[{"language":[{"iso":"eng"}],"user_id":"44006","department":[{"_id":"54"}],"_id":"11932","status":"public","abstract":[{"lang":"eng","text":"While the main objective of adaptive Filter-and-Sum beamforming is to obtain an enhanced speech signal for subsequent processing like speech recognition, we show how speaker localization information can be derived from the filter coefficients. To increase localization accuracy, speaker tracking is performed by non-linear Bayesian state estimation, which is realized by sequential Monte Carlo methods. Improved acquisition and tracking performance was achieved even in highly reverberant environments, in comparison with both a Kalman Filter and a recently proposed Particle Filter operating on the output of a nonadaptive Delay-and-Sum beamformer."}],"type":"conference","publication":"International Conference on Spoken Language Processing (ICSLP 2004)","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2004/WaHaPe04.pdf","open_access":"1"}],"title":"Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization","author":[{"first_name":"Ernst","last_name":"Warsitz","full_name":"Warsitz, Ernst"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"full_name":"Peschke, Sven","last_name":"Peschke","first_name":"Sven"}],"date_created":"2019-07-12T05:31:02Z","oa":"1","date_updated":"2022-01-06T06:51:12Z","citation":{"ama":"Warsitz E, Haeb-Umbach R, Peschke S. Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization. In: <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>. ; 2004.","chicago":"Warsitz, Ernst, Reinhold Haeb-Umbach, and Sven Peschke. “Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization.” In <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004.","ieee":"E. Warsitz, R. Haeb-Umbach, and S. Peschke, “Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization,” in <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004.","apa":"Warsitz, E., Haeb-Umbach, R., &#38; Peschke, S. (2004). Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization. In <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>.","short":"E. Warsitz, R. Haeb-Umbach, S. Peschke, in: International Conference on Spoken Language Processing (ICSLP 2004), 2004.","mla":"Warsitz, Ernst, et al. “Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization.” <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004.","bibtex":"@inproceedings{Warsitz_Haeb-Umbach_Peschke_2004, title={Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization}, booktitle={International Conference on Spoken Language Processing (ICSLP 2004)}, author={Warsitz, Ernst and Haeb-Umbach, Reinhold and Peschke, Sven}, year={2004} }"},"year":"2004"},{"title":"Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2003/Ha03.pdf"}],"date_updated":"2022-01-06T06:51:08Z","oa":"1","author":[{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_created":"2019-07-12T05:28:03Z","year":"2003","page":"68-71","citation":{"apa":"Haeb-Umbach, R. (2003). Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung. <i>Forschungsforum Paderborn</i>, 68–71.","mla":"Haeb-Umbach, Reinhold. “Auf Ein Wort - Moeglichkeiten Und Grenzen Der Automatischen Spracherkennung.” <i>Forschungsforum Paderborn</i>, 2003, pp. 68–71.","bibtex":"@article{Haeb-Umbach_2003, title={Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung}, journal={Forschungsforum Paderborn}, author={Haeb-Umbach, Reinhold}, year={2003}, pages={68–71} }","short":"R. Haeb-Umbach, Forschungsforum Paderborn (2003) 68–71.","ama":"Haeb-Umbach R. Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung. <i>Forschungsforum Paderborn</i>. 2003:68-71.","chicago":"Haeb-Umbach, Reinhold. “Auf Ein Wort - Moeglichkeiten Und Grenzen Der Automatischen Spracherkennung.” <i>Forschungsforum Paderborn</i>, 2003, 68–71.","ieee":"R. Haeb-Umbach, “Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung,” <i>Forschungsforum Paderborn</i>, pp. 68–71, 2003."},"language":[{"iso":"eng"}],"_id":"11777","department":[{"_id":"54"}],"user_id":"44006","status":"public","publication":"Forschungsforum Paderborn","type":"journal_article"},{"status":"public","abstract":[{"lang":"eng","text":"Automatic speech recognition of real-live broadcast news (BN) data (Hub-4) has become a challenging research topic in recent years. This paper summarizes our key efforts to build a large vocabulary continuous speech recognition system for the heterogenous BN task without inducing undesired complexity and computational resources. These key efforts included: - automatic segmentation of the audio signal into speech utterances; - efficient one-pass trigram decoding using look-ahead techniques; - optimal log-linear interpolation of a variety of acoustic and language models using discriminative model combination (DMC); - handling short-range and weak longer-range correlations in natural speech and language by the use of phrases and of distance-language models; - improving the acoustic modeling by a robust feature extraction, channel normalization, adaptation techniques as well as automatic script selection and verification. The starting point of the system development was the Philips 64k-NAB word-internal triphone trigram system. On the speaker-independent but microphone-dependent NAB-task (transcription of read newspaper texts) we obtained a word error rate of about 10\\%. Now, at the conclusion of the system development, we have arrived at Philips at an DMC-interpolated phrase-based crossword-pentaphone 4-gram system. This system transcribes BN data with an overall word error rate of about 17\\%."}],"publication":"Speech Communication","type":"journal_article","language":[{"iso":"eng"}],"department":[{"_id":"54"}],"user_id":"44006","_id":"11727","page":"109-131","citation":{"chicago":"Beyerlein, P., X. Aubert, Reinhold Haeb-Umbach, M. Harris, D. Klakow, A. Wendemuth, S. Molau, N. Ney, Michael Pitz, and A. Sixtus. “Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach.” <i>Speech Communication</i>, no. 37 (2002): 109–31.","ieee":"P. Beyerlein <i>et al.</i>, “Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach,” <i>Speech Communication</i>, no. 37, pp. 109–131, 2002.","ama":"Beyerlein P, Aubert X, Haeb-Umbach R, et al. Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach. <i>Speech Communication</i>. 2002;(37):109-131.","apa":"Beyerlein, P., Aubert, X., Haeb-Umbach, R., Harris, M., Klakow, D., Wendemuth, A., … Sixtus, A. (2002). Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach. <i>Speech Communication</i>, (37), 109–131.","mla":"Beyerlein, P., et al. “Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach.” <i>Speech Communication</i>, no. 37, 2002, pp. 109–31.","bibtex":"@article{Beyerlein_Aubert_Haeb-Umbach_Harris_Klakow_Wendemuth_Molau_Ney_Pitz_Sixtus_2002, title={Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach}, number={37}, journal={Speech Communication}, author={Beyerlein, P. and Aubert, X. and Haeb-Umbach, Reinhold and Harris, M. and Klakow, D. and Wendemuth, A. and Molau, S. and Ney, N. and Pitz, Michael and Sixtus, A.}, year={2002}, pages={109–131} }","short":"P. Beyerlein, X. Aubert, R. Haeb-Umbach, M. Harris, D. Klakow, A. Wendemuth, S. Molau, N. Ney, M. Pitz, A. Sixtus, Speech Communication (2002) 109–131."},"year":"2002","issue":"37","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2002/BeAuHaHaKlWeMoNePiSi02.pdf"}],"title":"Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach","date_created":"2019-07-12T05:27:05Z","author":[{"first_name":"P.","full_name":"Beyerlein, P.","last_name":"Beyerlein"},{"last_name":"Aubert","full_name":"Aubert, X.","first_name":"X."},{"last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold"},{"full_name":"Harris, M.","last_name":"Harris","first_name":"M."},{"full_name":"Klakow, D.","last_name":"Klakow","first_name":"D."},{"full_name":"Wendemuth, A.","last_name":"Wendemuth","first_name":"A."},{"last_name":"Molau","full_name":"Molau, S.","first_name":"S."},{"first_name":"N.","full_name":"Ney, N.","last_name":"Ney"},{"last_name":"Pitz","full_name":"Pitz, Michael","first_name":"Michael"},{"first_name":"A.","full_name":"Sixtus, A.","last_name":"Sixtus"}],"date_updated":"2022-01-06T06:51:07Z","oa":"1"},{"language":[{"iso":"eng"}],"user_id":"44006","department":[{"_id":"54"}],"_id":"11731","status":"public","abstract":[{"text":"Currently the future satellite navigation system Galileo and the third generation mobile communications system UMTS are on their way to the market in Europe. cdma2000 is under development in the USA and, furthermore, a new civil GPS signal in L2 band and the new frequency band L5 are added. In a hybrid receiver for satellite navigation and mobile radio communications, the possibility of an additional usage of the mobile radio signals for navigation purposes could also be a remedy to one problem of satellite navigation systems, which is the reduced location accuracy inside of buildings and urban canyons. A hybrid receiver with two fully separated receiver branches would lead to an increased bill of material and to increased power consumption in the receiver. This paper, therefore, introduces a hybrid receiver capable of evaluating Galileo/GPS as well as UMTS/cdma2000 signals with reduced computational efforts. Furthermore, the proposed structure performs a constructive superposition of the incoming paths to improve location accuracy.","lang":"eng"}],"type":"conference","publication":"ION-GPS 2002","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/BiHaHe02.pdf","open_access":"1"}],"title":"A Joint Time Multiplex Receiver for UMTS and Galileo","author":[{"first_name":"Renke","last_name":"Bischoff","full_name":"Bischoff, Renke"},{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"},{"full_name":"Heinrichs, Guenther","last_name":"Heinrichs","first_name":"Guenther"}],"date_created":"2019-07-12T05:27:10Z","oa":"1","date_updated":"2022-01-06T06:51:08Z","citation":{"ama":"Bischoff R, Haeb-Umbach R, Heinrichs G. A Joint Time Multiplex Receiver for UMTS and Galileo. In: <i>ION-GPS 2002</i>. ; 2002.","ieee":"R. Bischoff, R. Haeb-Umbach, and G. Heinrichs, “A Joint Time Multiplex Receiver for UMTS and Galileo,” in <i>ION-GPS 2002</i>, 2002.","chicago":"Bischoff, Renke, Reinhold Haeb-Umbach, and Guenther Heinrichs. “A Joint Time Multiplex Receiver for UMTS and Galileo.” In <i>ION-GPS 2002</i>, 2002.","mla":"Bischoff, Renke, et al. “A Joint Time Multiplex Receiver for UMTS and Galileo.” <i>ION-GPS 2002</i>, 2002.","short":"R. Bischoff, R. Haeb-Umbach, G. Heinrichs, in: ION-GPS 2002, 2002.","bibtex":"@inproceedings{Bischoff_Haeb-Umbach_Heinrichs_2002, title={A Joint Time Multiplex Receiver for UMTS and Galileo}, booktitle={ION-GPS 2002}, author={Bischoff, Renke and Haeb-Umbach, Reinhold and Heinrichs, Guenther}, year={2002} }","apa":"Bischoff, R., Haeb-Umbach, R., &#38; Heinrichs, G. (2002). A Joint Time Multiplex Receiver for UMTS and Galileo. In <i>ION-GPS 2002</i>."},"year":"2002"},{"year":"2002","intvolume":"         4","page":"1844-1848 vol.4","citation":{"ama":"Bischoff R, Haeb-Umbach R, Schulz W, Heinrichs G. Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver. In: <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>. Vol 4. ; 2002:1844-1848 vol.4. doi:<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>","chicago":"Bischoff, Renke, Reinhold Haeb-Umbach, Wolfgang Schulz, and Guenther Heinrichs. “Employment of a Multipath Receiver Structure in a Combined GALILEO/UMTS Receiver.” In <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, 4:1844–48 vol.4, 2002. <a href=\"https://doi.org/10.1109/VTC.2002.1002940\">https://doi.org/10.1109/VTC.2002.1002940</a>.","ieee":"R. Bischoff, R. Haeb-Umbach, W. Schulz, and G. Heinrichs, “Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver,” in <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, 2002, vol. 4, pp. 1844–1848 vol.4.","short":"R. Bischoff, R. Haeb-Umbach, W. Schulz, G. Heinrichs, in: IEEE 55th Vehicular Technology Conference (VTC 2002 Spring), 2002, pp. 1844–1848 vol.4.","mla":"Bischoff, Renke, et al. “Employment of a Multipath Receiver Structure in a Combined GALILEO/UMTS Receiver.” <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i>, vol. 4, 2002, pp. 1844–48 vol.4, doi:<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>.","bibtex":"@inproceedings{Bischoff_Haeb-Umbach_Schulz_Heinrichs_2002, title={Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver}, volume={4}, DOI={<a href=\"https://doi.org/10.1109/VTC.2002.1002940\">10.1109/VTC.2002.1002940</a>}, booktitle={IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)}, author={Bischoff, Renke and Haeb-Umbach, Reinhold and Schulz, Wolfgang and Heinrichs, Guenther}, year={2002}, pages={1844–1848 vol.4} }","apa":"Bischoff, R., Haeb-Umbach, R., Schulz, W., &#38; Heinrichs, G. (2002). Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver. In <i>IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)</i> (Vol. 4, pp. 1844–1848 vol.4). <a href=\"https://doi.org/10.1109/VTC.2002.1002940\">https://doi.org/10.1109/VTC.2002.1002940</a>"},"oa":"1","date_updated":"2022-01-06T06:51:08Z","volume":4,"author":[{"first_name":"Renke","last_name":"Bischoff","full_name":"Bischoff, Renke"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"first_name":"Wolfgang","last_name":"Schulz","full_name":"Schulz, Wolfgang"},{"first_name":"Guenther","last_name":"Heinrichs","full_name":"Heinrichs, Guenther"}],"date_created":"2019-07-12T05:27:12Z","title":"Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver","doi":"10.1109/VTC.2002.1002940","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/BiHaScHe02.pdf","open_access":"1"}],"publication":"IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)","type":"conference","abstract":[{"text":"Current navigation systems like GPS (Global Positioning System) and its Russian counterpart GLONASS (Global Navigation Satellite System) only evaluate the direct signal path. The receivers treat the reflected paths also reaching the receiver antenna as disturbance which has to be suppressed. Multipath affects the tracking accuracy by resulting in a degeneration of the S-curve of the DLL (delay locked loop). Nowadays the future European systems GALILEO and GPSIIF/III with two new signals are on the way to the market and it is time to think about new receiver structures. Therefore we investigated if it is possible to use multipath for navigation constructively.","lang":"eng"}],"status":"public","_id":"11733","department":[{"_id":"54"}],"user_id":"44006","keyword":["combined GALILEO/UMTS receiver","delay locked loop","delay lock loops","DLL","Global Positioning System","GLONASS","GPS","GPSIIF/III","mobile satellite communication","multipath channels","multipath receiver structure","radio receivers","RAKE receiver","S-curve"],"language":[{"iso":"eng"}]},{"_id":"11808","department":[{"_id":"54"}],"user_id":"44006","language":[{"iso":"eng"}],"publication":"International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)","type":"conference","abstract":[{"text":"Current location methods for cellular communication systems TOA and E-OTD exploit time delays and time differences of various base station signals measured in a mobile phone to determine its location. These methods assume line-of-sight (LOS) connections to all utilized base stations. Since mobile radio channels are mainly characterized by scattered propagation paths and non-line-of-sight (NLOS) propagation, bias errors occur when measured time delays and time differences are utilized in position calculation algorithms. In this paper, the distribution of the time error due to NLOS propagation is estimated based on the channel model proposed in [1]. In combination with actual channel measurements in [2] the NLOS time error and its probability distribution function is estimated. With this information being determined for each received signal, position calculation algorithms can utilize the reliability information to enhance positioning accuracy. [1] L. J. Greenstein, V. Erceg, Y. S. Yeh, M. V. Clark, {grqq}A new path-gain/delay-spread propagation model for digital cellular channels'', IEEE Transactions on Vehicular Technology, Vol. 46, No. 2, May 1997 [2] H. Asplund, {grqq}Wideband Channel Measurements in Central Stockholm'', T1P1.5/98-242r1","lang":"eng"}],"status":"public","oa":"1","date_updated":"2022-01-06T06:51:09Z","author":[{"first_name":"Thomas","full_name":"Hesse, Thomas","last_name":"Hesse"},{"first_name":"Renke","last_name":"Bischoff","full_name":"Bischoff, Renke"},{"first_name":"Wolfgang","full_name":"Schulz, Wolfgang","last_name":"Schulz"},{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_created":"2019-07-12T05:28:39Z","title":"Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2002/HeBiScHa02.pdf"}],"year":"2002","citation":{"apa":"Hesse, T., Bischoff, R., Schulz, W., &#38; Haeb-Umbach, R. (2002). Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System. In <i>International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)</i>.","bibtex":"@inproceedings{Hesse_Bischoff_Schulz_Haeb-Umbach_2002, title={Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System}, booktitle={International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)}, author={Hesse, Thomas and Bischoff, Renke and Schulz, Wolfgang and Haeb-Umbach, Reinhold}, year={2002} }","short":"T. Hesse, R. Bischoff, W. Schulz, R. Haeb-Umbach, in: International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002), 2002.","mla":"Hesse, Thomas, et al. “Estimation of Bias Location Error Due to Absence of the LOS-Signal in a UMTS-System.” <i>International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)</i>, 2002.","chicago":"Hesse, Thomas, Renke Bischoff, Wolfgang Schulz, and Reinhold Haeb-Umbach. “Estimation of Bias Location Error Due to Absence of the LOS-Signal in a UMTS-System.” In <i>International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)</i>, 2002.","ieee":"T. Hesse, R. Bischoff, W. Schulz, and R. Haeb-Umbach, “Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System,” in <i>International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)</i>, 2002.","ama":"Hesse T, Bischoff R, Schulz W, Haeb-Umbach R. Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System. In: <i>International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)</i>. ; 2002."}},{"year":"2001","citation":{"ieee":"R. Bischoff, R. Haeb-Umbach, W. Schulz, and G. Heinrichs, “Implementation of a Rake Receiver Architecture into a Galileo Receiver,” in <i>1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)</i>, 2001.","chicago":"Bischoff, R., Reinhold Haeb-Umbach, W. Schulz, and G. Heinrichs. “Implementation of a Rake Receiver Architecture into a Galileo Receiver.” In <i>1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)</i>, 2001.","ama":"Bischoff R, Haeb-Umbach R, Schulz W, Heinrichs G. Implementation of a Rake Receiver Architecture into a Galileo Receiver. In: <i>1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)</i>. ; 2001.","bibtex":"@inproceedings{Bischoff_Haeb-Umbach_Schulz_Heinrichs_2001, title={Implementation of a Rake Receiver Architecture into a Galileo Receiver}, booktitle={1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)}, author={Bischoff, R. and Haeb-Umbach, Reinhold and Schulz, W. and Heinrichs, G.}, year={2001} }","short":"R. Bischoff, R. Haeb-Umbach, W. Schulz, G. Heinrichs, in: 1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001), 2001.","mla":"Bischoff, R., et al. “Implementation of a Rake Receiver Architecture into a Galileo Receiver.” <i>1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)</i>, 2001.","apa":"Bischoff, R., Haeb-Umbach, R., Schulz, W., &#38; Heinrichs, G. (2001). Implementation of a Rake Receiver Architecture into a Galileo Receiver. In <i>1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)</i>."},"oa":"1","date_updated":"2022-01-06T06:51:08Z","author":[{"full_name":"Bischoff, R.","last_name":"Bischoff","first_name":"R."},{"last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242","first_name":"Reinhold"},{"last_name":"Schulz","full_name":"Schulz, W.","first_name":"W."},{"last_name":"Heinrichs","full_name":"Heinrichs, G.","first_name":"G."}],"date_created":"2019-07-12T05:27:14Z","title":"Implementation of a Rake Receiver Architecture into a Galileo Receiver","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2001/BiHaScHe01.pdf"}],"type":"conference","publication":"1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)","status":"public","_id":"11734","user_id":"44006","department":[{"_id":"54"}],"language":[{"iso":"eng"}]},{"department":[{"_id":"54"}],"user_id":"44006","_id":"11778","language":[{"iso":"eng"}],"keyword":["acoustic space","adaptation experiments","automatic generation","bottom-up clustering","broad phonetic class regression trees","correlation criterion","correlation methods","maximum likelihood estimation","maximum likelihood linear regression based speaker adaptation","MLLR adaptation","pattern clustering","phonetic regression class trees","speaker-independent training data","speech recognition","speech units","statistical analysis","trees (mathematics)"],"publication":"IEEE Transactions on Speech and Audio Processing","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"In this paper, it is shown that a correlation criterion is the appropriate criterion for bottom-up clustering to obtain broad phonetic class regression trees for maximum likelihood linear regression (MLLR)-based speaker adaptation. The correlation structure among speech units is estimated on the speaker-independent training data. In adaptation experiments the tree outperformed a regression tree obtained from clustering according to closeness in acoustic space and achieved results comparable with those of a manually designed broad phonetic class tree"}],"volume":9,"date_created":"2019-07-12T05:28:04Z","author":[{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"oa":"1","date_updated":"2022-01-06T06:51:08Z","doi":"10.1109/89.906003","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2001/Ha01.pdf"}],"title":"Automatic generation of phonetic regression class trees for MLLR adaptation","issue":"3","page":"299-302","intvolume":"         9","citation":{"chicago":"Haeb-Umbach, Reinhold. “Automatic Generation of Phonetic Regression Class Trees for MLLR Adaptation.” <i>IEEE Transactions on Speech and Audio Processing</i> 9, no. 3 (2001): 299–302. <a href=\"https://doi.org/10.1109/89.906003\">https://doi.org/10.1109/89.906003</a>.","ieee":"R. Haeb-Umbach, “Automatic generation of phonetic regression class trees for MLLR adaptation,” <i>IEEE Transactions on Speech and Audio Processing</i>, vol. 9, no. 3, pp. 299–302, 2001.","ama":"Haeb-Umbach R. Automatic generation of phonetic regression class trees for MLLR adaptation. <i>IEEE Transactions on Speech and Audio Processing</i>. 2001;9(3):299-302. doi:<a href=\"https://doi.org/10.1109/89.906003\">10.1109/89.906003</a>","apa":"Haeb-Umbach, R. (2001). Automatic generation of phonetic regression class trees for MLLR adaptation. <i>IEEE Transactions on Speech and Audio Processing</i>, <i>9</i>(3), 299–302. <a href=\"https://doi.org/10.1109/89.906003\">https://doi.org/10.1109/89.906003</a>","bibtex":"@article{Haeb-Umbach_2001, title={Automatic generation of phonetic regression class trees for MLLR adaptation}, volume={9}, DOI={<a href=\"https://doi.org/10.1109/89.906003\">10.1109/89.906003</a>}, number={3}, journal={IEEE Transactions on Speech and Audio Processing}, author={Haeb-Umbach, Reinhold}, year={2001}, pages={299–302} }","short":"R. Haeb-Umbach, IEEE Transactions on Speech and Audio Processing 9 (2001) 299–302.","mla":"Haeb-Umbach, Reinhold. “Automatic Generation of Phonetic Regression Class Trees for MLLR Adaptation.” <i>IEEE Transactions on Speech and Audio Processing</i>, vol. 9, no. 3, 2001, pp. 299–302, doi:<a href=\"https://doi.org/10.1109/89.906003\">10.1109/89.906003</a>."},"year":"2001"},{"issue":"7","year":"2001","date_created":"2019-07-12T05:29:51Z","title":"Multiclass linear dimension reduction by weighted pairwise Fisher criteria","publication":"IEEE Transactions on Pattern Analysis and Machine Intelligence","abstract":[{"lang":"eng","text":"We derive a class of computationally inexpensive linear dimension reduction criteria by introducing a weighted variant of the well-known K-class Fisher criterion associated with linear discriminant analysis (LDA). It can be seen that LDA weights contributions of individual class pairs according to the Euclidean distance of the respective class means. We generalize upon LDA by introducing a different weighting function"}],"keyword":["approximate pairwise accuracy","Bayes error","Bayes methods","error statistics","Euclidean distance","Fisher criterion","linear dimension reduction","linear discriminant analysis","pattern classification","statistical analysis","statistical pattern classification","weighting function"],"language":[{"iso":"eng"}],"citation":{"ama":"Loog M, Duin RPW, Haeb-Umbach R. Multiclass linear dimension reduction by weighted pairwise Fisher criteria. <i>IEEE Transactions on Pattern Analysis and Machine Intelligence</i>. 2001;23(7):762-766. doi:<a href=\"https://doi.org/10.1109/34.935849\">10.1109/34.935849</a>","ieee":"M. Loog, R. P. W. Duin, and R. Haeb-Umbach, “Multiclass linear dimension reduction by weighted pairwise Fisher criteria,” <i>IEEE Transactions on Pattern Analysis and Machine Intelligence</i>, vol. 23, no. 7, pp. 762–766, 2001.","chicago":"Loog, M., R.P.W. Duin, and Reinhold Haeb-Umbach. “Multiclass Linear Dimension Reduction by Weighted Pairwise Fisher Criteria.” <i>IEEE Transactions on Pattern Analysis and Machine Intelligence</i> 23, no. 7 (2001): 762–66. <a href=\"https://doi.org/10.1109/34.935849\">https://doi.org/10.1109/34.935849</a>.","apa":"Loog, M., Duin, R. P. W., &#38; Haeb-Umbach, R. (2001). Multiclass linear dimension reduction by weighted pairwise Fisher criteria. <i>IEEE Transactions on Pattern Analysis and Machine Intelligence</i>, <i>23</i>(7), 762–766. <a href=\"https://doi.org/10.1109/34.935849\">https://doi.org/10.1109/34.935849</a>","short":"M. Loog, R.P.W. Duin, R. Haeb-Umbach, IEEE Transactions on Pattern Analysis and Machine Intelligence 23 (2001) 762–766.","mla":"Loog, M., et al. “Multiclass Linear Dimension Reduction by Weighted Pairwise Fisher Criteria.” <i>IEEE Transactions on Pattern Analysis and Machine Intelligence</i>, vol. 23, no. 7, 2001, pp. 762–66, doi:<a href=\"https://doi.org/10.1109/34.935849\">10.1109/34.935849</a>.","bibtex":"@article{Loog_Duin_Haeb-Umbach_2001, title={Multiclass linear dimension reduction by weighted pairwise Fisher criteria}, volume={23}, DOI={<a href=\"https://doi.org/10.1109/34.935849\">10.1109/34.935849</a>}, number={7}, journal={IEEE Transactions on Pattern Analysis and Machine Intelligence}, author={Loog, M. and Duin, R.P.W. and Haeb-Umbach, Reinhold}, year={2001}, pages={762–766} }"},"page":"762-766","intvolume":"        23","oa":"1","date_updated":"2022-01-06T06:51:11Z","author":[{"first_name":"M.","full_name":"Loog, M.","last_name":"Loog"},{"first_name":"R.P.W.","full_name":"Duin, R.P.W.","last_name":"Duin"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"volume":23,"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2001/LoDuHa01.pdf"}],"doi":"10.1109/34.935849","type":"journal_article","status":"public","_id":"11870","user_id":"44006","department":[{"_id":"54"}]},{"language":[{"iso":"eng"}],"department":[{"_id":"54"}],"user_id":"44006","_id":"11758","status":"public","abstract":[{"lang":"eng","text":"The traditional way to find a linear solution to the feature extraction problem is based on the maximization of the class-between scatter over the class-within scatter (Fisher mapping). For the multi-class problem this is, however, sub-optimal due to class conjunctions, even for the simple situation of normal distributed classes with identical covariance matrices. We propose a novel, equally fast method, based on nonlinear PCA. Although still sub-optimal, it may avoid the class conjunction. The proposed method is experimentally compared with Fisher mapping and with a neural network based approach to nonlinear PCA. It appears to outperform both methods, the first one even in a dramatic way."}],"publication":"International Conference on Pattern Recognition (ICPR 2000)","type":"conference","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/DuLoHa2000paper.pdf","open_access":"1"}],"title":"Multi-class Linear Feature Extraction by Nonlinear PCA","date_created":"2019-07-12T05:27:41Z","author":[{"last_name":"Duin","full_name":"Duin, Robert P.W.","first_name":"Robert P.W."},{"full_name":"Loog, Marco","last_name":"Loog","first_name":"Marco"},{"first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold"}],"date_updated":"2022-01-06T06:51:08Z","oa":"1","citation":{"ama":"Duin RPW, Loog M, Haeb-Umbach R. Multi-class Linear Feature Extraction by Nonlinear PCA. In: <i>International Conference on Pattern Recognition (ICPR 2000)</i>. ; 2000.","chicago":"Duin, Robert P.W., Marco Loog, and Reinhold Haeb-Umbach. “Multi-Class Linear Feature Extraction by Nonlinear PCA.” In <i>International Conference on Pattern Recognition (ICPR 2000)</i>, 2000.","ieee":"R. P. W. Duin, M. Loog, and R. Haeb-Umbach, “Multi-class Linear Feature Extraction by Nonlinear PCA,” in <i>International Conference on Pattern Recognition (ICPR 2000)</i>, 2000.","apa":"Duin, R. P. W., Loog, M., &#38; Haeb-Umbach, R. (2000). Multi-class Linear Feature Extraction by Nonlinear PCA. In <i>International Conference on Pattern Recognition (ICPR 2000)</i>.","bibtex":"@inproceedings{Duin_Loog_Haeb-Umbach_2000, title={Multi-class Linear Feature Extraction by Nonlinear PCA}, booktitle={International Conference on Pattern Recognition (ICPR 2000)}, author={Duin, Robert P.W. and Loog, Marco and Haeb-Umbach, Reinhold}, year={2000} }","short":"R.P.W. Duin, M. Loog, R. Haeb-Umbach, in: International Conference on Pattern Recognition (ICPR 2000), 2000.","mla":"Duin, Robert P. W., et al. “Multi-Class Linear Feature Extraction by Nonlinear PCA.” <i>International Conference on Pattern Recognition (ICPR 2000)</i>, 2000."},"year":"2000"},{"title":"Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/Ha00.pdf","open_access":"1"}],"date_updated":"2022-01-06T06:51:08Z","oa":"1","author":[{"first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold"}],"date_created":"2019-07-12T05:28:05Z","year":"2000","citation":{"apa":"Haeb-Umbach, R. (2000). Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation. In <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>.","bibtex":"@inproceedings{Haeb-Umbach_2000, title={Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation}, booktitle={International Conference on Spoken Language Processing (ICSLP 2000)}, author={Haeb-Umbach, Reinhold}, year={2000} }","short":"R. Haeb-Umbach, in: International Conference on Spoken Language Processing (ICSLP 2000), 2000.","mla":"Haeb-Umbach, Reinhold. “Data-Driven Phonetic Regression Class Tree Estimation for MLLR Adaptation.” <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000.","ama":"Haeb-Umbach R. Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation. In: <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>. ; 2000.","ieee":"R. Haeb-Umbach, “Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation,” in <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000.","chicago":"Haeb-Umbach, Reinhold. “Data-Driven Phonetic Regression Class Tree Estimation for MLLR Adaptation.” In <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000."},"language":[{"iso":"eng"}],"_id":"11779","user_id":"44006","department":[{"_id":"54"}],"status":"public","type":"conference","publication":"International Conference on Spoken Language Processing (ICSLP 2000)"},{"_id":"11869","user_id":"44006","department":[{"_id":"54"}],"keyword":["acoustic echo cancellation algorithms","adverse environmental conditions","automatic speech recognition","cepstral analysis","cepstral features","cepstral mean normalization","command word task","delta-delta features","delta features","echo suppression","error rate reductions","feature vector components","FIR filters","LDA derived cepstral trajectory filters","linear discriminant analysis","long-range feature filters","phone accuracy","real-life room impulse responses","reverberant data","spectral parameters","speech recognition","standard TIMIT phone recognition task"],"language":[{"iso":"eng"}],"type":"conference","publication":"IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)","abstract":[{"text":"Amongst several data driven approaches for designing filters for the time sequence of spectral parameters, the linear discriminant analysis (LDA) based method has been proposed for automatic speech recognition. Here we apply LDA-based filter design to cepstral features, which better match the inherent assumption of this method that feature vector components are uncorrelated. Extensive recognition experiments have been conducted both on the standard TIMIT phone recognition task and on a proprietary 130-words command word task under various adverse environmental conditions, including reverberant data with real-life room impulse responses and data processed by acoustic echo cancellation algorithms. Significant error rate reductions have been achieved when applying the novel long-range feature filters compared to standard approaches employing cepstral mean normalization and delta and delta-delta features, in particular when facing acoustic echo cancellation scenarios and room reverberation. For example, the phone accuracy on reverberated TIMIT data could be increased from 50.7\\% to 56.0\\%","lang":"eng"}],"status":"public","date_updated":"2022-01-06T06:51:11Z","oa":"1","author":[{"first_name":"M.","last_name":"Lieb","full_name":"Lieb, M."},{"full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_created":"2019-07-12T05:29:50Z","volume":2,"title":"LDA derived cepstral trajectory filters in adverse environmental conditions","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/LiHa00.pdf","open_access":"1"}],"doi":"10.1109/ICASSP.2000.859157","year":"2000","citation":{"ieee":"M. Lieb and R. Haeb-Umbach, “LDA derived cepstral trajectory filters in adverse environmental conditions,” in <i>IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)</i>, 2000, vol. 2, pp. II1105-II1108 vol.2.","chicago":"Lieb, M., and Reinhold Haeb-Umbach. “LDA Derived Cepstral Trajectory Filters in Adverse Environmental Conditions.” In <i>IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)</i>, 2:II1105-II1108 vol.2, 2000. <a href=\"https://doi.org/10.1109/ICASSP.2000.859157\">https://doi.org/10.1109/ICASSP.2000.859157</a>.","ama":"Lieb M, Haeb-Umbach R. LDA derived cepstral trajectory filters in adverse environmental conditions. In: <i>IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)</i>. Vol 2. ; 2000:II1105-II1108 vol.2. doi:<a href=\"https://doi.org/10.1109/ICASSP.2000.859157\">10.1109/ICASSP.2000.859157</a>","bibtex":"@inproceedings{Lieb_Haeb-Umbach_2000, title={LDA derived cepstral trajectory filters in adverse environmental conditions}, volume={2}, DOI={<a href=\"https://doi.org/10.1109/ICASSP.2000.859157\">10.1109/ICASSP.2000.859157</a>}, booktitle={IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)}, author={Lieb, M. and Haeb-Umbach, Reinhold}, year={2000}, pages={II1105-II1108 vol.2} }","short":"M. Lieb, R. Haeb-Umbach, in: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000), 2000, pp. II1105-II1108 vol.2.","mla":"Lieb, M., and Reinhold Haeb-Umbach. “LDA Derived Cepstral Trajectory Filters in Adverse Environmental Conditions.” <i>IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)</i>, vol. 2, 2000, pp. II1105-II1108 vol.2, doi:<a href=\"https://doi.org/10.1109/ICASSP.2000.859157\">10.1109/ICASSP.2000.859157</a>.","apa":"Lieb, M., &#38; Haeb-Umbach, R. (2000). LDA derived cepstral trajectory filters in adverse environmental conditions. In <i>IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)</i> (Vol. 2, pp. II1105-II1108 vol.2). <a href=\"https://doi.org/10.1109/ICASSP.2000.859157\">https://doi.org/10.1109/ICASSP.2000.859157</a>"},"intvolume":"         2","page":"II1105-II1108 vol.2"},{"title":"Multi-class Linear Dimension Reduction by Generalized Fisher Criteria","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/LoHa00.pdf","open_access":"1"}],"oa":"1","date_updated":"2022-01-06T06:51:11Z","author":[{"first_name":"M.","full_name":"Loog, M.","last_name":"Loog"},{"last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242","first_name":"Reinhold"}],"date_created":"2019-07-12T05:29:52Z","year":"2000","citation":{"mla":"Loog, M., and Reinhold Haeb-Umbach. “Multi-Class Linear Dimension Reduction by Generalized Fisher Criteria.” <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000.","bibtex":"@inproceedings{Loog_Haeb-Umbach_2000, title={Multi-class Linear Dimension Reduction by Generalized Fisher Criteria}, booktitle={International Conference on Spoken Language Processing (ICSLP 2000)}, author={Loog, M. and Haeb-Umbach, Reinhold}, year={2000} }","short":"M. Loog, R. Haeb-Umbach, in: International Conference on Spoken Language Processing (ICSLP 2000), 2000.","apa":"Loog, M., &#38; Haeb-Umbach, R. (2000). Multi-class Linear Dimension Reduction by Generalized Fisher Criteria. In <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>.","ama":"Loog M, Haeb-Umbach R. Multi-class Linear Dimension Reduction by Generalized Fisher Criteria. In: <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>. ; 2000.","chicago":"Loog, M., and Reinhold Haeb-Umbach. “Multi-Class Linear Dimension Reduction by Generalized Fisher Criteria.” In <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000.","ieee":"M. Loog and R. Haeb-Umbach, “Multi-class Linear Dimension Reduction by Generalized Fisher Criteria,” in <i>International Conference on Spoken Language Processing (ICSLP 2000)</i>, 2000."},"language":[{"iso":"eng"}],"_id":"11871","department":[{"_id":"54"}],"user_id":"44006","status":"public","publication":"International Conference on Spoken Language Processing (ICSLP 2000)","type":"conference"},{"title":"The Philips/RWTH system for transcription of broadcast news","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/1999/Eurospeech_2_1999_Haeb_paper.pdf","open_access":"1"}],"date_updated":"2022-01-06T06:51:07Z","oa":"1","author":[{"full_name":"Beyerlein, Peter","last_name":"Beyerlein","first_name":"Peter"},{"last_name":"Aubert","full_name":"Aubert, Xavier L.","first_name":"Xavier L."},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"first_name":"Matthew J.","last_name":"Harris","full_name":"Harris, Matthew J."},{"last_name":"Klakow","full_name":"Klakow, Dietrich","first_name":"Dietrich"},{"first_name":"Andreas","last_name":"Wendemuth","full_name":"Wendemuth, Andreas"},{"full_name":"Molau, Sirko","last_name":"Molau","first_name":"Sirko"},{"last_name":"Pitz","full_name":"Pitz, Michael","first_name":"Michael"},{"first_name":"Achim","last_name":"Sixtus","full_name":"Sixtus, Achim"}],"date_created":"2019-07-12T05:27:07Z","year":"1999","citation":{"ama":"Beyerlein P, Aubert XL, Haeb-Umbach R, et al. The Philips/RWTH system for transcription of broadcast news. In: <i>Eurospeech</i>. ; 1999.","ieee":"P. Beyerlein <i>et al.</i>, “The Philips/RWTH system for transcription of broadcast news,” in <i>Eurospeech</i>, 1999.","chicago":"Beyerlein, Peter, Xavier L. Aubert, Reinhold Haeb-Umbach, Matthew J. Harris, Dietrich Klakow, Andreas Wendemuth, Sirko Molau, Michael Pitz, and Achim Sixtus. “The Philips/RWTH System for Transcription of Broadcast News.” In <i>Eurospeech</i>, 1999.","short":"P. Beyerlein, X.L. Aubert, R. Haeb-Umbach, M.J. Harris, D. Klakow, A. Wendemuth, S. Molau, M. Pitz, A. Sixtus, in: Eurospeech, 1999.","mla":"Beyerlein, Peter, et al. “The Philips/RWTH System for Transcription of Broadcast News.” <i>Eurospeech</i>, 1999.","bibtex":"@inproceedings{Beyerlein_Aubert_Haeb-Umbach_Harris_Klakow_Wendemuth_Molau_Pitz_Sixtus_1999, title={The Philips/RWTH system for transcription of broadcast news}, booktitle={Eurospeech}, author={Beyerlein, Peter and Aubert, Xavier L. and Haeb-Umbach, Reinhold and Harris, Matthew J. and Klakow, Dietrich and Wendemuth, Andreas and Molau, Sirko and Pitz, Michael and Sixtus, Achim}, year={1999} }","apa":"Beyerlein, P., Aubert, X. L., Haeb-Umbach, R., Harris, M. J., Klakow, D., Wendemuth, A., … Sixtus, A. (1999). The Philips/RWTH system for transcription of broadcast news. In <i>Eurospeech</i>."},"language":[{"iso":"eng"}],"_id":"11728","user_id":"44006","department":[{"_id":"54"}],"abstract":[{"lang":"eng","text":"This paper contains a description of the Philips/RWTH 1998 HUB4 system which has been build in a joint e ort of Philips Research Laboratories Aachen and Aachen University of Technology. We will focus our discussion on recent improvements compared to the original 1997 HUB4 system and evaluate them on the HUB4'97 evaluation data. The paper will deal with 1. a rough system overview including feature extraction, acoustic training, audio stream segmentation, and decoding 2. log-linear interpolation of distance-language models, 3. and the integration of various acoustic and language models via Discriminative Model Combination (DMC). The performance of the described system is 23% (relative) better than the performance of the 1997 Philips HUB4 system. A word error rate of 17.9% was achieved on the 1997 HUB4 evaluation set, compared to 23.5% using the original 1997 system."}],"status":"public","type":"conference","publication":"Eurospeech"},{"year":"1999","citation":{"apa":"Beyerlein, P., Aubert, X. L., Haeb-Umbach, R., Harris, M. J., Klakow, D., Wendemuth, A., … Sixtus, A. (1999). The Philips/RWTH System for Transcription of Broadcast News. In <i>Broadcast News Transcription and Understanding Workshop, Washington</i>.","bibtex":"@inproceedings{Beyerlein_Aubert_Haeb-Umbach_Harris_Klakow_Wendemuth_Molau_Pitz_Sixtus_1999, title={The Philips/RWTH System for Transcription of Broadcast News}, booktitle={Broadcast News Transcription and Understanding Workshop, Washington}, author={Beyerlein, Peter and Aubert, Xavier L. and Haeb-Umbach, Reinhold and Harris, Matthew J. and Klakow, Dietrich and Wendemuth, Andreas and Molau, Sirko and Pitz, Michael and Sixtus, Achim}, year={1999} }","mla":"Beyerlein, Peter, et al. “The Philips/RWTH System for Transcription of Broadcast News.” <i>Broadcast News Transcription and Understanding Workshop, Washington</i>, 1999.","short":"P. Beyerlein, X.L. Aubert, R. Haeb-Umbach, M.J. Harris, D. Klakow, A. Wendemuth, S. Molau, M. Pitz, A. Sixtus, in: Broadcast News Transcription and Understanding Workshop, Washington, 1999.","ieee":"P. Beyerlein <i>et al.</i>, “The Philips/RWTH System for Transcription of Broadcast News,” in <i>Broadcast News Transcription and Understanding Workshop, Washington</i>, 1999.","chicago":"Beyerlein, Peter, Xavier L. Aubert, Reinhold Haeb-Umbach, Matthew J. Harris, Dietrich Klakow, Andreas Wendemuth, Sirko Molau, Michael Pitz, and Achim Sixtus. “The Philips/RWTH System for Transcription of Broadcast News.” In <i>Broadcast News Transcription and Understanding Workshop, Washington</i>, 1999.","ama":"Beyerlein P, Aubert XL, Haeb-Umbach R, et al. The Philips/RWTH System for Transcription of Broadcast News. In: <i>Broadcast News Transcription and Understanding Workshop, Washington</i>. ; 1999."},"title":"The Philips/RWTH System for Transcription of Broadcast News","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/1999/Workshop_Washington_1999_Haeb_paper.pdf"}],"date_updated":"2022-01-06T06:51:07Z","oa":"1","author":[{"first_name":"Peter","full_name":"Beyerlein, Peter","last_name":"Beyerlein"},{"first_name":"Xavier L.","last_name":"Aubert","full_name":"Aubert, Xavier L."},{"first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach"},{"first_name":"Matthew J.","full_name":"Harris, Matthew J.","last_name":"Harris"},{"last_name":"Klakow","full_name":"Klakow, Dietrich","first_name":"Dietrich"},{"first_name":"Andreas","last_name":"Wendemuth","full_name":"Wendemuth, Andreas"},{"last_name":"Molau","full_name":"Molau, Sirko","first_name":"Sirko"},{"first_name":"Michael","last_name":"Pitz","full_name":"Pitz, Michael"},{"first_name":"Achim","last_name":"Sixtus","full_name":"Sixtus, Achim"}],"date_created":"2019-07-12T05:27:08Z","abstract":[{"text":"This paper contains a description of the Philips/RWTH 1998 HUB4 system which has been build in a joint e ort of Philips Research Laboratories Aachen and Aachen University of Technology. We will focus our discussion on recent improvements compared to the original 1997 HUB4 system and evaluate them on the HUB4'97 evaluation data. The paper will deal with 1. a rough system overview including feature extraction, acoustic training, audio stream segmentation, and decoding 2. log-linear interpolation of distance-language models, 3. and the integration of various acoustic and language models via Discriminative Model Combination (DMC). The performance of the described system is 23% (relative) better than the performance of the 1997 Philips HUB4 system. A word error rate of 17.9% was achieved on the 1997 HUB4 evaluation set, compared to 23.5% using the original 1997 system.","lang":"eng"}],"status":"public","type":"conference","publication":"Broadcast News Transcription and Understanding Workshop, Washington","language":[{"iso":"eng"}],"_id":"11729","user_id":"44006","department":[{"_id":"54"}]},{"department":[{"_id":"54"}],"user_id":"44006","_id":"11780","language":[{"iso":"eng"}],"publication":"ICASSP99 Phoenix, AZ","type":"conference","status":"public","abstract":[{"text":"We apply Fisher variate analysis to measure the effectiveness of speaker normalization techniques. A trace criterion, which measures the ratio of the variations due to different phonemes compared to variations due to different speakers, serves as a first assessment of a feature set without the need for recognition experiments. By using this measure and by recognition experiments we demonstrate that cepstral mean normalization also has a speaker normalization effect, in addition to the well-known channel normalization effect. Similarly vocal tract normalization (VTN) is shown to remove inter-speaker variability. For VTN we show that normalization on a per sentence basis performs better than normalization on a per speaker basis. Recognition results are given on Wall Street Journal and Hub-4 databases","lang":"eng"}],"author":[{"first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach"}],"date_created":"2019-07-12T05:28:07Z","oa":"1","date_updated":"2022-01-06T06:51:08Z","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/1999/ICASSP_1999_Haeb_paper.pdf"}],"title":"Investigations on inter-speaker variability in the feature space","citation":{"chicago":"Haeb-Umbach, Reinhold. “Investigations on Inter-Speaker Variability in the Feature Space.” In <i>ICASSP99 Phoenix, AZ</i>, 1999.","ieee":"R. Haeb-Umbach, “Investigations on inter-speaker variability in the feature space,” in <i>ICASSP99 Phoenix, AZ</i>, 1999.","ama":"Haeb-Umbach R. Investigations on inter-speaker variability in the feature space. In: <i>ICASSP99 Phoenix, AZ</i>. ; 1999.","short":"R. Haeb-Umbach, in: ICASSP99 Phoenix, AZ, 1999.","bibtex":"@inproceedings{Haeb-Umbach_1999, title={Investigations on inter-speaker variability in the feature space}, booktitle={ICASSP99 Phoenix, AZ}, author={Haeb-Umbach, Reinhold}, year={1999} }","mla":"Haeb-Umbach, Reinhold. “Investigations on Inter-Speaker Variability in the Feature Space.” <i>ICASSP99 Phoenix, AZ</i>, 1999.","apa":"Haeb-Umbach, R. (1999). Investigations on inter-speaker variability in the feature space. In <i>ICASSP99 Phoenix, AZ</i>."},"year":"1999"},{"language":[{"iso":"eng"}],"_id":"11791","department":[{"_id":"54"}],"user_id":"44006","abstract":[{"lang":"eng","text":"We examined variants of MFCC and PLP cepstral parameterisations in the context of large vocabulary continuous speech recognition under different acous-tical environmental conditions: Compared to MFCC, mel-frequency PLP uses a cubic root intensity-to-loudness law, and an LPC analysis is applied to the mel-warped spectrum. In LPC-smoothed MFCC, the only difference to MFCC is the additional LPC smoothing of the warped spectrum. While neither technique was able to significantly outperform the MFCC parameterisation in our setup which includes an LDA feature transformation, feature set combination via DMC at the acoustic likelihood level and via ROVER at the recognized word level delivered small but consistent improvements."}],"status":"public","publication":"Eurospeech","type":"conference","title":"An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/1999/Eurospeech_1999_Haeb_paper.pdf"}],"date_updated":"2022-01-06T06:51:08Z","oa":"1","date_created":"2019-07-12T05:28:19Z","author":[{"last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold"},{"first_name":"Marco","last_name":"Loog","full_name":"Loog, Marco"}],"year":"1999","citation":{"ama":"Haeb-Umbach R, Loog M. An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition. In: <i>Eurospeech</i>. ; 1999.","ieee":"R. Haeb-Umbach and M. Loog, “An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition,” in <i>Eurospeech</i>, 1999.","chicago":"Haeb-Umbach, Reinhold, and Marco Loog. “An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition.” In <i>Eurospeech</i>, 1999.","apa":"Haeb-Umbach, R., &#38; Loog, M. (1999). An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition. In <i>Eurospeech</i>.","bibtex":"@inproceedings{Haeb-Umbach_Loog_1999, title={An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition}, booktitle={Eurospeech}, author={Haeb-Umbach, Reinhold and Loog, Marco}, year={1999} }","mla":"Haeb-Umbach, Reinhold, and Marco Loog. “An Investigation of Cepstral Parameterisations for Large Vocabulary Speech Recognition.” <i>Eurospeech</i>, 1999.","short":"R. Haeb-Umbach, M. Loog, in: Eurospeech, 1999."}},{"abstract":[{"lang":"eng","text":"In transcription of broadcast news, dividing the signal into homogeneous segments, and clustering together similar segments is important. Decoding a complete broadcast news program in one chunk is technically di cult. Also, through creation of homogeneous clusters of segments, improvement from adaptation can be increased. Two systems of segmentation and clustering are compared. The best system used the BIC algorithm to produce long, homogeneous segments, and a nearest neighbour bottom-up agglomerative clustering algorithm to produce homogeneous clusters. Adaptation brought a word error rate (WER) improvement from 23:4% to 21:0% using the automatic segmentation and clustering, compared to an improvement from 21:8% to 20:0% using a handmade \\correct\" segmentation and clustering."}],"status":"public","type":"conference","publication":"Eurospeech","language":[{"iso":"eng"}],"_id":"11805","user_id":"44006","department":[{"_id":"54"}],"year":"1999","citation":{"mla":"Harris, Matthew J., et al. “A Study of Broadcast News Audio Stream Segmentation and Segment Clustering.” <i>Eurospeech</i>, 1999.","bibtex":"@inproceedings{Harris_Aubert_Haeb-Umbach_Beyerlein_1999, title={A study of broadcast news audio stream segmentation and segment clustering}, booktitle={Eurospeech}, author={Harris, Matthew J. and Aubert, Xavier L. and Haeb-Umbach, Reinhold and Beyerlein, Peter}, year={1999} }","short":"M.J. Harris, X.L. Aubert, R. Haeb-Umbach, P. Beyerlein, in: Eurospeech, 1999.","apa":"Harris, M. J., Aubert, X. L., Haeb-Umbach, R., &#38; Beyerlein, P. (1999). A study of broadcast news audio stream segmentation and segment clustering. In <i>Eurospeech</i>.","ieee":"M. J. Harris, X. L. Aubert, R. Haeb-Umbach, and P. Beyerlein, “A study of broadcast news audio stream segmentation and segment clustering,” in <i>Eurospeech</i>, 1999.","chicago":"Harris, Matthew J., Xavier L. Aubert, Reinhold Haeb-Umbach, and Peter Beyerlein. “A Study of Broadcast News Audio Stream Segmentation and Segment Clustering.” In <i>Eurospeech</i>, 1999.","ama":"Harris MJ, Aubert XL, Haeb-Umbach R, Beyerlein P. A study of broadcast news audio stream segmentation and segment clustering. In: <i>Eurospeech</i>. ; 1999."},"title":"A study of broadcast news audio stream segmentation and segment clustering","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/1999/Eurospeech_1_1999_Haeb_paper.pdf","open_access":"1"}],"date_updated":"2022-01-06T06:51:09Z","oa":"1","author":[{"first_name":"Matthew J.","full_name":"Harris, Matthew J.","last_name":"Harris"},{"first_name":"Xavier L.","full_name":"Aubert, Xavier L.","last_name":"Aubert"},{"first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach"},{"last_name":"Beyerlein","full_name":"Beyerlein, Peter","first_name":"Peter"}],"date_created":"2019-07-12T05:28:36Z"},{"language":[{"iso":"eng"}],"department":[{"_id":"54"}],"user_id":"44006","_id":"11730","status":"public","abstract":[{"text":"In this paper the Philips Broadcast News transcription system is described. The Broadcast News task aims at the recognition of \"found\" speech in radio and television broadcasts without any additional side information (e.g. speaking style, background conditions). The system was derived from the Philips continuous mixture density crossword HMM system, using MFCC features and Laplacian densities. A segmentation was performed to obtain sentence-like partitions of the broadcasts. Using data-driven clustering, the obtained segments were grouped into clusters with similar acoustic conditions for adaptation purposes. Gender independent word-internal and crossword triphone models were trained on 70 hours of the HUB4 training data. No focus condition specific training was applied. Channel and speaker normalization was done by mean and variance normalization as well as VTN and MLLR. The transcription was produced by an adaptive multiple pass decoder starting with phrase-bigram decoding using word-internal triphones and finishing with a phrase-trigram decoding using MLLR-adapted crossword models.","lang":"eng"}],"publication":"DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne","type":"conference","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/1998/Workshop_Lansdowne_1998_Haeb_paper.pdf"}],"title":"Automatic Transcription of English Broadcast News","date_created":"2019-07-12T05:27:09Z","author":[{"first_name":"Peter","last_name":"Beyerlein","full_name":"Beyerlein, Peter"},{"full_name":"Aubert, Xavier L.","last_name":"Aubert","first_name":"Xavier L."},{"first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach"},{"first_name":"Dietrich","last_name":"Klakow","full_name":"Klakow, Dietrich"},{"last_name":"Ullrich","full_name":"Ullrich, Meinhard","first_name":"Meinhard"},{"full_name":"Wendemuth, Andreas","last_name":"Wendemuth","first_name":"Andreas"},{"full_name":"Wilcox, Patricia","last_name":"Wilcox","first_name":"Patricia"}],"oa":"1","date_updated":"2022-01-06T06:51:08Z","citation":{"bibtex":"@inproceedings{Beyerlein_Aubert_Haeb-Umbach_Klakow_Ullrich_Wendemuth_Wilcox_1998, title={Automatic Transcription of English Broadcast News}, booktitle={DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne}, author={Beyerlein, Peter and Aubert, Xavier L. and Haeb-Umbach, Reinhold and Klakow, Dietrich and Ullrich, Meinhard and Wendemuth, Andreas and Wilcox, Patricia}, year={1998} }","short":"P. Beyerlein, X.L. Aubert, R. Haeb-Umbach, D. Klakow, M. Ullrich, A. Wendemuth, P. Wilcox, in: DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne, 1998.","mla":"Beyerlein, Peter, et al. “Automatic Transcription of English Broadcast News.” <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","apa":"Beyerlein, P., Aubert, X. L., Haeb-Umbach, R., Klakow, D., Ullrich, M., Wendemuth, A., &#38; Wilcox, P. (1998). Automatic Transcription of English Broadcast News. In <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>.","chicago":"Beyerlein, Peter, Xavier L. Aubert, Reinhold Haeb-Umbach, Dietrich Klakow, Meinhard Ullrich, Andreas Wendemuth, and Patricia Wilcox. “Automatic Transcription of English Broadcast News.” In <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","ieee":"P. Beyerlein <i>et al.</i>, “Automatic Transcription of English Broadcast News,” in <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","ama":"Beyerlein P, Aubert XL, Haeb-Umbach R, et al. Automatic Transcription of English Broadcast News. In: <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>. ; 1998."},"year":"1998"},{"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/1998/Workshop_Landsdowne_1998_Haeb2_paper.pdf"}],"title":"Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System","author":[{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"first_name":"Xavier L.","full_name":"Aubert, Xavier L.","last_name":"Aubert"},{"full_name":"Beyerlein, Peter","last_name":"Beyerlein","first_name":"Peter"},{"last_name":"Klakow","full_name":"Klakow, Dietrich","first_name":"Dietrich"},{"last_name":"Ullrich","full_name":"Ullrich, Meinhard","first_name":"Meinhard"},{"last_name":"Wendemuth","full_name":"Wendemuth, Andreas","first_name":"Andreas"},{"first_name":"Patricia","last_name":"Wilcox","full_name":"Wilcox, Patricia"}],"date_created":"2019-07-12T05:28:11Z","oa":"1","date_updated":"2022-01-06T06:51:08Z","citation":{"chicago":"Haeb-Umbach, Reinhold, Xavier L. Aubert, Peter Beyerlein, Dietrich Klakow, Meinhard Ullrich, Andreas Wendemuth, and Patricia Wilcox. “Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System.” In <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","ieee":"R. Haeb-Umbach <i>et al.</i>, “Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System,” in <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","ama":"Haeb-Umbach R, Aubert XL, Beyerlein P, et al. Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System. In: <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>. ; 1998.","apa":"Haeb-Umbach, R., Aubert, X. L., Beyerlein, P., Klakow, D., Ullrich, M., Wendemuth, A., &#38; Wilcox, P. (1998). Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System. In <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>.","mla":"Haeb-Umbach, Reinhold, et al. “Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System.” <i>DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne</i>, 1998.","short":"R. Haeb-Umbach, X.L. Aubert, P. Beyerlein, D. Klakow, M. Ullrich, A. Wendemuth, P. Wilcox, in: DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne, 1998.","bibtex":"@inproceedings{Haeb-Umbach_Aubert_Beyerlein_Klakow_Ullrich_Wendemuth_Wilcox_1998, title={Acoustic Modeling in the Philips Hub-4 Continuous-Speech Recognition System}, booktitle={DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne}, author={Haeb-Umbach, Reinhold and Aubert, Xavier L. and Beyerlein, Peter and Klakow, Dietrich and Ullrich, Meinhard and Wendemuth, Andreas and Wilcox, Patricia}, year={1998} }"},"year":"1998","language":[{"iso":"eng"}],"department":[{"_id":"54"}],"user_id":"44006","_id":"11784","status":"public","abstract":[{"lang":"eng","text":"In this paper we describe some characteristics of the acoustic modeling used in the Philips continuous-speech recognition system for the DARPA Hub-4 1997 evaluation, which are related to robustness issues. We aimed at a conceptually simple system: We trained two model sets on 70 hours of the Hub-4 training data, one for within-word and one for cross-word decoding. These model sets were used for both genders and all environmental conditions. In order to be able to do so, channel normalization (mean, variance normalization) and speaker normalization (vocal tract length normalization, realized by an appropriate shift of the center frequencies of the mel filter bank) have been applied, as well as adaptation techniques. MLLR-based unsupervised batch adaptation on clusters of segments was conducted both after a first within-word decoding and a cross-word decoding pass. The training strategy and the effects of the various normalization and adaptation techniques will be discussed in the paper."}],"publication":"DARPA Broadcast News Transcription and Understanding Workshop, Landsdowne","type":"conference"}]