[{"doi":"10.1109/ICASSP.2005.1416129","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2005/WaHa05.pdf","open_access":"1"}],"language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:51:12Z","intvolume":"         4","title":"Acoustic filter-and-sum beamforming by adaptive principal component analysis","year":"2005","author":[{"full_name":"Warsitz, Ernst","last_name":"Warsitz","first_name":"Ernst"},{"full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold","id":"242"}],"keyword":["acoustic filter-and-sum beamforming","acoustic room impulses","acoustic signal processing","adaptive principal component analysis","adaptive signal processing","architectural acoustics","constrained optimization problem","cross power spectral density","deterministic algorithm","deterministic algorithms","distant-talking environments","eigenvalues and eigenfunctions","eigenvector","enhanced signal","filter-and-sum beamformer","FIR filter coefficients","FIR filter coefficients","FIR filters","gradient methods","human-machine interfaces","iterative estimation","iterative methods","largest eigenvalue","microphone signals","multichannel signal processing","optimisation","principal component analysis","spectral analysis","stochastic gradient ascent algorithm","stochastic processes"],"type":"conference","department":[{"_id":"54"}],"date_created":"2019-07-12T05:31:00Z","abstract":[{"lang":"eng","text":"For human-machine interfaces in distant-talking environments multichannel signal processing is often employed to obtain an enhanced signal for subsequent processing. In this paper we propose a novel adaptation algorithm for a filter-and-sum beamformer to adjust the coefficients of FIR filters to changing acoustic room impulses, e.g. due to speaker movement. A deterministic and a stochastic gradient ascent algorithm are derived from a constrained optimization problem, which iteratively estimates the eigenvector corresponding to the largest eigenvalue of the cross power spectral density of the microphone signals. The method does not require an explicit estimation of the speaker location. The experimental results show fast adaptation and excellent robustness of the proposed algorithm."}],"publication":"IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)","user_id":"44006","volume":4,"page":"iv/797-iv/800 Vol. 4","_id":"11930","status":"public","oa":"1","citation":{"short":"E. Warsitz, R. Haeb-Umbach, in: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005), 2005, p. iv/797-iv/800 Vol. 4.","chicago":"Warsitz, Ernst, and Reinhold Haeb-Umbach. “Acoustic Filter-and-Sum Beamforming by Adaptive Principal Component Analysis.” In <i>IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)</i>, 4:iv/797-iv/800 Vol. 4, 2005. <a href=\"https://doi.org/10.1109/ICASSP.2005.1416129\">https://doi.org/10.1109/ICASSP.2005.1416129</a>.","ieee":"E. Warsitz and R. Haeb-Umbach, “Acoustic filter-and-sum beamforming by adaptive principal component analysis,” in <i>IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)</i>, 2005, vol. 4, p. iv/797-iv/800 Vol. 4.","apa":"Warsitz, E., &#38; Haeb-Umbach, R. (2005). Acoustic filter-and-sum beamforming by adaptive principal component analysis. In <i>IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)</i> (Vol. 4, p. iv/797-iv/800 Vol. 4). <a href=\"https://doi.org/10.1109/ICASSP.2005.1416129\">https://doi.org/10.1109/ICASSP.2005.1416129</a>","bibtex":"@inproceedings{Warsitz_Haeb-Umbach_2005, title={Acoustic filter-and-sum beamforming by adaptive principal component analysis}, volume={4}, DOI={<a href=\"https://doi.org/10.1109/ICASSP.2005.1416129\">10.1109/ICASSP.2005.1416129</a>}, booktitle={IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)}, author={Warsitz, Ernst and Haeb-Umbach, Reinhold}, year={2005}, pages={iv/797-iv/800 Vol. 4} }","ama":"Warsitz E, Haeb-Umbach R. Acoustic filter-and-sum beamforming by adaptive principal component analysis. In: <i>IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)</i>. Vol 4. ; 2005:iv/797-iv/800 Vol. 4. doi:<a href=\"https://doi.org/10.1109/ICASSP.2005.1416129\">10.1109/ICASSP.2005.1416129</a>","mla":"Warsitz, Ernst, and Reinhold Haeb-Umbach. “Acoustic Filter-and-Sum Beamforming by Adaptive Principal Component Analysis.” <i>IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2005)</i>, vol. 4, 2005, p. iv/797-iv/800 Vol. 4, doi:<a href=\"https://doi.org/10.1109/ICASSP.2005.1416129\">10.1109/ICASSP.2005.1416129</a>."}},{"citation":{"apa":"Haeb-Umbach, R., &#38; Schmalenstroeer, J. (2005). Speech Processing in the Networked Home Environment - A View on the Amigo Project. <i>Interspeech 2005</i>.","ieee":"R. Haeb-Umbach and J. Schmalenstroeer, “Speech Processing in the Networked Home Environment - A View on the Amigo Project,” 2005.","short":"R. Haeb-Umbach, J. Schmalenstroeer, in: Interspeech 2005, Lisboa, 2005.","chicago":"Haeb-Umbach, Reinhold, and Joerg Schmalenstroeer. “Speech Processing in the Networked Home Environment - A View on the Amigo Project.” In <i>Interspeech 2005</i>. Lisboa, 2005.","mla":"Haeb-Umbach, Reinhold, and Joerg Schmalenstroeer. “Speech Processing in the Networked Home Environment - A View on the Amigo Project.” <i>Interspeech 2005</i>, 2005.","ama":"Haeb-Umbach R, Schmalenstroeer J. Speech Processing in the Networked Home Environment - A View on the Amigo Project. In: <i>Interspeech 2005</i>. ; 2005.","bibtex":"@inproceedings{Haeb-Umbach_Schmalenstroeer_2005, place={Lisboa}, title={Speech Processing in the Networked Home Environment - A View on the Amigo Project}, booktitle={Interspeech 2005}, author={Haeb-Umbach, Reinhold and Schmalenstroeer, Joerg}, year={2005} }"},"publication":"Interspeech 2005","quality_controlled":"1","date_created":"2019-07-12T05:28:32Z","place":"Lisboa","department":[{"_id":"54"}],"oa":"1","type":"conference","author":[{"full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242"},{"first_name":"Joerg","last_name":"Schmalenstroeer","full_name":"Schmalenstroeer, Joerg","id":"460"}],"title":"Speech Processing in the Networked Home Environment - A View on the Amigo Project","year":"2005","status":"public","date_updated":"2023-10-26T08:09:00Z","language":[{"iso":"eng"}],"_id":"11802","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2005/HaSc05-2.pdf","open_access":"1"}],"user_id":"460"},{"oa":"1","department":[{"_id":"54"}],"type":"conference","date_created":"2019-07-12T05:28:31Z","quality_controlled":"1","citation":{"mla":"Haeb-Umbach, Reinhold, and Joerg Schmalenstroeer. “A Comparison of Particle Filtering Variants for Speech Feature Enhancement.” <i>Interspeech 2005</i>, 2005.","bibtex":"@inproceedings{Haeb-Umbach_Schmalenstroeer_2005, title={A Comparison of Particle Filtering Variants for Speech Feature Enhancement}, booktitle={Interspeech 2005}, author={Haeb-Umbach, Reinhold and Schmalenstroeer, Joerg}, year={2005} }","ama":"Haeb-Umbach R, Schmalenstroeer J. A Comparison of Particle Filtering Variants for Speech Feature Enhancement. In: <i>Interspeech 2005</i>. ; 2005.","ieee":"R. Haeb-Umbach and J. Schmalenstroeer, “A Comparison of Particle Filtering Variants for Speech Feature Enhancement,” 2005.","apa":"Haeb-Umbach, R., &#38; Schmalenstroeer, J. (2005). A Comparison of Particle Filtering Variants for Speech Feature Enhancement. <i>Interspeech 2005</i>.","chicago":"Haeb-Umbach, Reinhold, and Joerg Schmalenstroeer. “A Comparison of Particle Filtering Variants for Speech Feature Enhancement.” In <i>Interspeech 2005</i>, 2005.","short":"R. Haeb-Umbach, J. Schmalenstroeer, in: Interspeech 2005, 2005."},"publication":"Interspeech 2005","user_id":"460","_id":"11801","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2005/HaSc05-1.pdf"}],"date_updated":"2023-10-26T08:09:13Z","author":[{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"id":"460","full_name":"Schmalenstroeer, Joerg","last_name":"Schmalenstroeer","first_name":"Joerg"}],"year":"2005","status":"public","title":"A Comparison of Particle Filtering Variants for Speech Feature Enhancement"},{"date_updated":"2022-01-06T06:51:08Z","intvolume":"        58","year":"2004","status":"public","title":"Multipath-Resistant Time of Arrival Estimation for Satellite Positioning","author":[{"full_name":"Bischoff, R.","last_name":"Bischoff","first_name":"R."},{"full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242"},{"full_name":"Nammi, Sai Ramesh","last_name":"Nammi","first_name":"Sai Ramesh"}],"user_id":"44006","volume":58,"main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2004/BiHaNa04.pdf","open_access":"1"}],"_id":"11732","language":[{"iso":"eng"}],"abstract":[{"text":"Satellite positioning systems, such as GPS or the future European system Galileo, employ direct-sequence spread-spectrum signals. The positioning accuracy is strongly affected by the quality of the pseudo range measurements. These measurements necessitate code and carrier synchronization of the received signal with the internally generated reference signals. In this type of systems one major error source is the multipath phenomenon, which results in a sum of delayed and weighted copies of the original signal to be present at the receiver input. This can result in a systematic error of the code tracking loop resulting in range errors in the order of several tens of meters. In this paper we propose an extension of the standard code tracking loop capable of estimating the parameters of the line-of-sight (LOS) signal and separating the LOS from the reflected signal portions. It is based on an analysis of the cross correlation of the received signal with a locally generated code sequence in the vicinity of the tracking point of a Delay-Locked Loop (DLL). For this reason, we call this method Cross Correlation Function (CCF) Analysis. The proposed method achieves considerably more accurate estimates than a DLL. Its performance is comparable to the Multipath Estimating Delay-Locked Loop (MEDLL) which is considered to be the best method for reducing multipath induced errors, so far. However, the computational complexity of the CCF Analysis is by a factor of three smaller compared to the MEDLL. Extensive simulations have been conducted for the proposed method and the MEDLL in order to assess the robustness of the two approaches under various signal constellations.","lang":"eng"}],"issue":"1","publication":"AEUe, Int. Journal on Electronics and Communications","citation":{"short":"R. Bischoff, R. Haeb-Umbach, S.R. Nammi, AEUe, Int. Journal on Electronics and Communications 58 (2004).","chicago":"Bischoff, R., Reinhold Haeb-Umbach, and Sai Ramesh Nammi. “Multipath-Resistant Time of Arrival Estimation for Satellite Positioning.” <i>AEUe, Int. Journal on Electronics and Communications</i> 58, no. 1 (2004).","ieee":"R. Bischoff, R. Haeb-Umbach, and S. R. Nammi, “Multipath-Resistant Time of Arrival Estimation for Satellite Positioning,” <i>AEUe, Int. Journal on Electronics and Communications</i>, vol. 58, no. 1, 2004.","apa":"Bischoff, R., Haeb-Umbach, R., &#38; Nammi, S. R. (2004). Multipath-Resistant Time of Arrival Estimation for Satellite Positioning. <i>AEUe, Int. Journal on Electronics and Communications</i>, <i>58</i>(1).","bibtex":"@article{Bischoff_Haeb-Umbach_Nammi_2004, title={Multipath-Resistant Time of Arrival Estimation for Satellite Positioning}, volume={58}, number={1}, journal={AEUe, Int. Journal on Electronics and Communications}, author={Bischoff, R. and Haeb-Umbach, Reinhold and Nammi, Sai Ramesh}, year={2004} }","ama":"Bischoff R, Haeb-Umbach R, Nammi SR. Multipath-Resistant Time of Arrival Estimation for Satellite Positioning. <i>AEUe, Int Journal on Electronics and Communications</i>. 2004;58(1).","mla":"Bischoff, R., et al. “Multipath-Resistant Time of Arrival Estimation for Satellite Positioning.” <i>AEUe, Int. Journal on Electronics and Communications</i>, vol. 58, no. 1, 2004."},"type":"journal_article","department":[{"_id":"54"}],"oa":"1","date_created":"2019-07-12T05:27:11Z"},{"author":[{"full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold","id":"242"},{"last_name":"Ion","first_name":"Valentin","full_name":"Ion, Valentin"}],"year":"2004","status":"public","title":"Soft Features for Improved Distributed Speech Recognition over Wireless Networks","date_updated":"2022-01-06T06:51:08Z","language":[{"iso":"eng"}],"_id":"11790","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2004/HaIo04.pdf"}],"user_id":"44006","citation":{"mla":"Haeb-Umbach, Reinhold, and Valentin Ion. “Soft Features for Improved Distributed Speech Recognition over Wireless Networks.” <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004.","bibtex":"@inproceedings{Haeb-Umbach_Ion_2004, title={Soft Features for Improved Distributed Speech Recognition over Wireless Networks}, booktitle={International Conference on Spoken Language Processing (ICSLP 2004)}, author={Haeb-Umbach, Reinhold and Ion, Valentin}, year={2004} }","ama":"Haeb-Umbach R, Ion V. Soft Features for Improved Distributed Speech Recognition over Wireless Networks. In: <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>. ; 2004.","ieee":"R. Haeb-Umbach and V. Ion, “Soft Features for Improved Distributed Speech Recognition over Wireless Networks,” in <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004.","apa":"Haeb-Umbach, R., &#38; Ion, V. (2004). Soft Features for Improved Distributed Speech Recognition over Wireless Networks. In <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>.","short":"R. Haeb-Umbach, V. Ion, in: International Conference on Spoken Language Processing (ICSLP 2004), 2004.","chicago":"Haeb-Umbach, Reinhold, and Valentin Ion. “Soft Features for Improved Distributed Speech Recognition over Wireless Networks.” In <i>International Conference on Spoken Language Processing (ICSLP 2004)</i>, 2004."},"publication":"International Conference on Spoken Language Processing (ICSLP 2004)","abstract":[{"lang":"eng","text":"A major drawback of distributed versus terminal-based speech recognition is the fact that transmission errors can lead to degraded recognition performance. In this paper we employ soft features to mitigate the effect of bit errors on wireless transmission links: At the receiver a posteriori probabilities of the transmitted feature vectors are computed by combining bit reliability information provided by the channel decoder and a priori knowledge about residual redundancy in the feature vectors. While the first-order moment of the a posteriori probability function is the MMSE estimate, the second-order moment is a measure of the uncertainty in the reconstructed features. We conducted realistic simulations of GSM transmission and achieved significant improvements in word accuracy compared to the error mitigation strategy described in the ETSI standard."}],"date_created":"2019-07-12T05:28:18Z","department":[{"_id":"54"}],"oa":"1","type":"conference"},{"abstract":[{"lang":"eng","text":"The paper is concerned with binaural signal processing for a bimodal human-robot interface with hearing and vision. The two microphone signals are processed to obtain an enhanced single-channel input signal for the subsequent speech recognizer and to localize the acoustic source, an important information for establishing a natural human-robot communication. We utilize a robust adaptive algorithm for filter-and-sum beamforming (FSB) and extract speaker direction information from the resulting FIR filter coefficients. Further, particle filtering is applied which conducts a nonlinear Bayesian tracking of speaker movement. Good location accuracy can be achieved even in highly reverberant environments. The results obtained outperform the conventional generalized cross correlation (GCC) method."}],"publication":"IEEE Workshop on Multimedia Signal Processing (MMSP 2004)","citation":{"ieee":"E. Warsitz and R. Haeb-Umbach, “Robust speaker direction estimation with particle filtering,” in <i>IEEE Workshop on Multimedia Signal Processing (MMSP 2004)</i>, 2004, pp. 367–370.","apa":"Warsitz, E., &#38; Haeb-Umbach, R. (2004). Robust speaker direction estimation with particle filtering. In <i>IEEE Workshop on Multimedia Signal Processing (MMSP 2004)</i> (pp. 367–370). <a href=\"https://doi.org/10.1109/MMSP.2004.1436569\">https://doi.org/10.1109/MMSP.2004.1436569</a>","chicago":"Warsitz, Ernst, and Reinhold Haeb-Umbach. “Robust Speaker Direction Estimation with Particle Filtering.” In <i>IEEE Workshop on Multimedia Signal Processing (MMSP 2004)</i>, 367–70, 2004. <a href=\"https://doi.org/10.1109/MMSP.2004.1436569\">https://doi.org/10.1109/MMSP.2004.1436569</a>.","short":"E. Warsitz, R. Haeb-Umbach, in: IEEE Workshop on Multimedia Signal Processing (MMSP 2004), 2004, pp. 367–370.","mla":"Warsitz, Ernst, and Reinhold Haeb-Umbach. “Robust Speaker Direction Estimation with Particle Filtering.” <i>IEEE Workshop on Multimedia Signal Processing (MMSP 2004)</i>, 2004, pp. 367–70, doi:<a href=\"https://doi.org/10.1109/MMSP.2004.1436569\">10.1109/MMSP.2004.1436569</a>.","bibtex":"@inproceedings{Warsitz_Haeb-Umbach_2004, title={Robust speaker direction estimation with particle filtering}, DOI={<a href=\"https://doi.org/10.1109/MMSP.2004.1436569\">10.1109/MMSP.2004.1436569</a>}, booktitle={IEEE Workshop on Multimedia Signal Processing (MMSP 2004)}, author={Warsitz, Ernst and Haeb-Umbach, Reinhold}, year={2004}, pages={367–370} }","ama":"Warsitz E, Haeb-Umbach R. Robust speaker direction estimation with particle filtering. In: <i>IEEE Workshop on Multimedia Signal Processing (MMSP 2004)</i>. ; 2004:367-370. doi:<a href=\"https://doi.org/10.1109/MMSP.2004.1436569\">10.1109/MMSP.2004.1436569</a>"},"type":"conference","keyword":["bimodal human-robot interface","binaural signal processing","enhanced single-channel input signal","filter-and-sum beamforming","filtering theory","FIR filter coefficient","generalized cross correlation method","microphones","microphone signal","nonlinear Bayesian tracking","particle filtering","robust adaptive algorithm","robust speaker direction estimation","signal processing","speech enhancement","speech recognition","speech recognizer","user interfaces"],"department":[{"_id":"54"}],"oa":"1","date_created":"2019-07-12T05:31:01Z","date_updated":"2022-01-06T06:51:12Z","year":"2004","status":"public","title":"Robust speaker direction estimation with particle filtering","author":[{"full_name":"Warsitz, Ernst","last_name":"Warsitz","first_name":"Ernst"},{"full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242"}],"user_id":"44006","doi":"10.1109/MMSP.2004.1436569","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2004/WaHa04.pdf","open_access":"1"}],"page":"367-370","language":[{"iso":"eng"}],"_id":"11931"},{"author":[{"first_name":"Ernst","last_name":"Warsitz","full_name":"Warsitz, Ernst"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach"},{"full_name":"Peschke, Sven","last_name":"Peschke","first_name":"Sven"}],"status":"public","year":"2004","title":"Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization","date_updated":"2022-01-06T06:51:12Z","_id":"11932","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2004/WaHaPe04.pdf"}],"user_id":"44006","citation":{"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.","short":"E. Warsitz, R. Haeb-Umbach, S. Peschke, in: International Conference on Spoken Language Processing (ICSLP 2004), 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>.","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.","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.","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} }","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."},"publication":"International Conference on Spoken Language Processing (ICSLP 2004)","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."}],"date_created":"2019-07-12T05:31:02Z","department":[{"_id":"54"}],"oa":"1","type":"conference"},{"user_id":"44006","language":[{"iso":"eng"}],"_id":"11777","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2003/Ha03.pdf","open_access":"1"}],"page":"68-71","date_updated":"2022-01-06T06:51:08Z","author":[{"full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242"}],"title":"Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung","year":"2003","status":"public","department":[{"_id":"54"}],"oa":"1","type":"journal_article","date_created":"2019-07-12T05:28:03Z","citation":{"mla":"Haeb-Umbach, Reinhold. “Auf Ein Wort - Moeglichkeiten Und Grenzen Der Automatischen Spracherkennung.” <i>Forschungsforum Paderborn</i>, 2003, pp. 68–71.","ama":"Haeb-Umbach R. Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung. <i>Forschungsforum Paderborn</i>. 2003:68-71.","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} }","apa":"Haeb-Umbach, R. (2003). Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung. <i>Forschungsforum Paderborn</i>, 68–71.","ieee":"R. Haeb-Umbach, “Auf ein Wort - Moeglichkeiten und Grenzen der automatischen Spracherkennung,” <i>Forschungsforum Paderborn</i>, pp. 68–71, 2003.","chicago":"Haeb-Umbach, Reinhold. “Auf Ein Wort - Moeglichkeiten Und Grenzen Der Automatischen Spracherkennung.” <i>Forschungsforum Paderborn</i>, 2003, 68–71.","short":"R. Haeb-Umbach, Forschungsforum Paderborn (2003) 68–71."},"publication":"Forschungsforum Paderborn"},{"abstract":[{"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\\%.","lang":"eng"}],"citation":{"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.","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.","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.","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.","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."},"publication":"Speech Communication","issue":"37","department":[{"_id":"54"}],"oa":"1","type":"journal_article","date_created":"2019-07-12T05:27:05Z","date_updated":"2022-01-06T06:51:07Z","author":[{"full_name":"Beyerlein, P.","last_name":"Beyerlein","first_name":"P."},{"full_name":"Aubert, X.","first_name":"X.","last_name":"Aubert"},{"id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold"},{"full_name":"Harris, M.","last_name":"Harris","first_name":"M."},{"full_name":"Klakow, D.","last_name":"Klakow","first_name":"D."},{"last_name":"Wendemuth","first_name":"A.","full_name":"Wendemuth, A."},{"full_name":"Molau, S.","first_name":"S.","last_name":"Molau"},{"last_name":"Ney","first_name":"N.","full_name":"Ney, N."},{"full_name":"Pitz, Michael","last_name":"Pitz","first_name":"Michael"},{"full_name":"Sixtus, A.","last_name":"Sixtus","first_name":"A."}],"title":"Large Vocabulary Continuous Speech Recognition of Broadcast News - The Philips/RWTH Approach","status":"public","year":"2002","user_id":"44006","language":[{"iso":"eng"}],"_id":"11727","page":"109-131","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/BeAuHaHaKlWeMoNePiSi02.pdf","open_access":"1"}]},{"date_updated":"2022-01-06T06:51:08Z","author":[{"first_name":"Renke","last_name":"Bischoff","full_name":"Bischoff, Renke"},{"id":"242","last_name":"Haeb-Umbach","first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold"},{"first_name":"Guenther","last_name":"Heinrichs","full_name":"Heinrichs, Guenther"}],"title":"A Joint Time Multiplex Receiver for UMTS and Galileo","status":"public","year":"2002","user_id":"44006","language":[{"iso":"eng"}],"_id":"11731","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2002/BiHaHe02.pdf"}],"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"}],"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.","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} }","mla":"Bischoff, Renke, et al. “A Joint Time Multiplex Receiver for UMTS and Galileo.” <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.","short":"R. Bischoff, R. Haeb-Umbach, G. Heinrichs, in: ION-GPS 2002, 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>.","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."},"publication":"ION-GPS 2002","department":[{"_id":"54"}],"oa":"1","type":"conference","date_created":"2019-07-12T05:27:10Z"},{"department":[{"_id":"54"}],"type":"conference","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"],"date_created":"2019-07-12T05:27:12Z","abstract":[{"lang":"eng","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."}],"publication":"IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)","doi":"10.1109/VTC.2002.1002940","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/BiHaScHe02.pdf","open_access":"1"}],"intvolume":"         4","date_updated":"2022-01-06T06:51:08Z","author":[{"full_name":"Bischoff, Renke","first_name":"Renke","last_name":"Bischoff"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach"},{"last_name":"Schulz","first_name":"Wolfgang","full_name":"Schulz, Wolfgang"},{"first_name":"Guenther","last_name":"Heinrichs","full_name":"Heinrichs, Guenther"}],"year":"2002","title":"Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver","oa":"1","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>","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} }","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>.","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>.","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.","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>","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."},"volume":4,"user_id":"44006","_id":"11733","page":"1844-1848 vol.4","status":"public"},{"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"}],"citation":{"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.","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>.","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.","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.","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} }","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."},"publication":"International Symposium on Location Based Services for Cellular Users (LOCELLUS 2002)","oa":"1","department":[{"_id":"54"}],"type":"conference","date_created":"2019-07-12T05:28:39Z","date_updated":"2022-01-06T06:51:09Z","author":[{"full_name":"Hesse, Thomas","first_name":"Thomas","last_name":"Hesse"},{"last_name":"Bischoff","first_name":"Renke","full_name":"Bischoff, Renke"},{"full_name":"Schulz, Wolfgang","first_name":"Wolfgang","last_name":"Schulz"},{"last_name":"Haeb-Umbach","first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"title":"Estimation of Bias Location Error due to Absence of the LOS-Signal in a UMTS-System","year":"2002","status":"public","user_id":"44006","_id":"11808","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2002/HeBiScHa02.pdf","open_access":"1"}]},{"user_id":"44006","_id":"11734","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2001/BiHaScHe01.pdf","open_access":"1"}],"date_updated":"2022-01-06T06:51:08Z","author":[{"first_name":"R.","last_name":"Bischoff","full_name":"Bischoff, R."},{"last_name":"Haeb-Umbach","first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242"},{"full_name":"Schulz, W.","first_name":"W.","last_name":"Schulz"},{"full_name":"Heinrichs, G.","last_name":"Heinrichs","first_name":"G."}],"title":"Implementation of a Rake Receiver Architecture into a Galileo Receiver","status":"public","year":"2001","oa":"1","department":[{"_id":"54"}],"type":"conference","date_created":"2019-07-12T05:27:14Z","citation":{"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.","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} }","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.","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.","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>.","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.","short":"R. Bischoff, R. Haeb-Umbach, W. Schulz, G. Heinrichs, in: 1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001), 2001."},"publication":"1st ESA Workshop on Satellite Navigation User Equipment Technology (Navitec 2001)"},{"citation":{"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>.","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} }","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>","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.","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>","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>.","short":"R. Haeb-Umbach, IEEE Transactions on Speech and Audio Processing 9 (2001) 299–302."},"oa":"1","status":"public","user_id":"44006","volume":9,"page":"299-302","_id":"11778","abstract":[{"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","lang":"eng"}],"publication":"IEEE Transactions on Speech and Audio Processing","issue":"3","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)"],"type":"journal_article","department":[{"_id":"54"}],"date_created":"2019-07-12T05:28:04Z","date_updated":"2022-01-06T06:51:08Z","intvolume":"         9","year":"2001","title":"Automatic generation of phonetic regression class trees for MLLR adaptation","author":[{"id":"242","first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold"}],"doi":"10.1109/89.906003","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2001/Ha01.pdf","open_access":"1"}],"language":[{"iso":"eng"}]},{"oa":"1","citation":{"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>.","short":"M. Loog, R.P.W. Duin, R. Haeb-Umbach, IEEE Transactions on Pattern Analysis and Machine Intelligence 23 (2001) 762–766.","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.","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>","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} }","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>","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>."},"_id":"11870","page":"762-766","volume":23,"user_id":"44006","status":"public","date_created":"2019-07-12T05:29:51Z","department":[{"_id":"54"}],"type":"journal_article","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"],"publication":"IEEE Transactions on Pattern Analysis and Machine Intelligence","issue":"7","abstract":[{"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","lang":"eng"}],"language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2001/LoDuHa01.pdf"}],"doi":"10.1109/34.935849","author":[{"first_name":"M.","last_name":"Loog","full_name":"Loog, M."},{"full_name":"Duin, R.P.W.","last_name":"Duin","first_name":"R.P.W."},{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"year":"2001","title":"Multiclass linear dimension reduction by weighted pairwise Fisher criteria","intvolume":"        23","date_updated":"2022-01-06T06:51:11Z"},{"title":"Multi-class Linear Feature Extraction by Nonlinear PCA","status":"public","year":"2000","author":[{"full_name":"Duin, Robert P.W.","last_name":"Duin","first_name":"Robert P.W."},{"last_name":"Loog","first_name":"Marco","full_name":"Loog, Marco"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_updated":"2022-01-06T06:51:08Z","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/DuLoHa2000paper.pdf","open_access":"1"}],"language":[{"iso":"eng"}],"_id":"11758","user_id":"44006","publication":"International Conference on Pattern Recognition (ICPR 2000)","citation":{"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.","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} }","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.","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>.","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.","short":"R.P.W. Duin, M. Loog, R. Haeb-Umbach, in: International Conference on Pattern Recognition (ICPR 2000), 2000."},"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."}],"date_created":"2019-07-12T05:27:41Z","type":"conference","oa":"1","department":[{"_id":"54"}]},{"main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2000/Ha00.pdf"}],"language":[{"iso":"eng"}],"_id":"11779","user_id":"44006","status":"public","title":"Data-driven Phonetic Regression Class Tree Estimation for MLLR Adaptation","year":"2000","author":[{"id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold","last_name":"Haeb-Umbach"}],"date_updated":"2022-01-06T06:51:08Z","date_created":"2019-07-12T05:28:05Z","type":"conference","department":[{"_id":"54"}],"oa":"1","publication":"International Conference on Spoken Language Processing (ICSLP 2000)","citation":{"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.","short":"R. Haeb-Umbach, in: International Conference on Spoken Language Processing (ICSLP 2000), 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.","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} }","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>.","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.","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."}},{"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"],"type":"conference","department":[{"_id":"54"}],"date_created":"2019-07-12T05:29:50Z","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"}],"publication":"IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000)","doi":"10.1109/ICASSP.2000.859157","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2000/LiHa00.pdf"}],"language":[{"iso":"eng"}],"date_updated":"2022-01-06T06:51:11Z","intvolume":"         2","title":"LDA derived cepstral trajectory filters in adverse environmental conditions","year":"2000","author":[{"last_name":"Lieb","first_name":"M.","full_name":"Lieb, M."},{"first_name":"Reinhold","last_name":"Haeb-Umbach","full_name":"Haeb-Umbach, Reinhold","id":"242"}],"oa":"1","citation":{"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>.","short":"M. Lieb, R. Haeb-Umbach, in: IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2000), 2000, pp. II1105-II1108 vol.2.","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.","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>","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} }","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>","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>."},"user_id":"44006","volume":2,"page":"II1105-II1108 vol.2","_id":"11869","status":"public"},{"date_updated":"2022-01-06T06:51:11Z","title":"Multi-class Linear Dimension Reduction by Generalized Fisher Criteria","status":"public","year":"2000","author":[{"last_name":"Loog","first_name":"M.","full_name":"Loog, M."},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"user_id":"44006","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2000/LoHa00.pdf","open_access":"1"}],"_id":"11871","language":[{"iso":"eng"}],"publication":"International Conference on Spoken Language Processing (ICSLP 2000)","citation":{"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} }","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.","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.","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.","short":"M. Loog, R. Haeb-Umbach, in: International Conference on Spoken Language Processing (ICSLP 2000), 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.","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>."},"type":"conference","department":[{"_id":"54"}],"oa":"1","date_created":"2019-07-12T05:29:52Z"},{"main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/1999/Eurospeech_2_1999_Haeb_paper.pdf","open_access":"1"}],"_id":"11728","language":[{"iso":"eng"}],"user_id":"44006","status":"public","year":"1999","title":"The Philips/RWTH system for transcription of broadcast news","author":[{"first_name":"Peter","last_name":"Beyerlein","full_name":"Beyerlein, Peter"},{"full_name":"Aubert, Xavier L.","first_name":"Xavier L.","last_name":"Aubert"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"},{"full_name":"Harris, Matthew J.","last_name":"Harris","first_name":"Matthew J."},{"first_name":"Dietrich","last_name":"Klakow","full_name":"Klakow, Dietrich"},{"last_name":"Wendemuth","first_name":"Andreas","full_name":"Wendemuth, Andreas"},{"first_name":"Sirko","last_name":"Molau","full_name":"Molau, Sirko"},{"full_name":"Pitz, Michael","first_name":"Michael","last_name":"Pitz"},{"first_name":"Achim","last_name":"Sixtus","full_name":"Sixtus, Achim"}],"date_updated":"2022-01-06T06:51:07Z","date_created":"2019-07-12T05:27:07Z","type":"conference","department":[{"_id":"54"}],"oa":"1","publication":"Eurospeech","citation":{"mla":"Beyerlein, Peter, et al. “The Philips/RWTH System for Transcription of Broadcast News.” <i>Eurospeech</i>, 1999.","ama":"Beyerlein P, Aubert XL, Haeb-Umbach R, et al. The Philips/RWTH system for transcription of broadcast news. In: <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>.","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."},"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."}]}]