Conference paper

LOZANO-DIEZ Alicia, SILNOVA Anna, MATĚJKA Pavel, GLEMBEK Ondřej, PLCHOT Oldřich, PEŠÁN Jan, BURGET Lukáš and GONZALEZ-RODRIGUEZ Joaquin. Analysis and Optimization of Bottleneck Features for Speaker Recognition. In: Proceedings of Odyssey 2016. Bilbao: International Speech Communication Association, 2016, pp. 352-357. ISSN 2312-2846. Available from:
Publication language:english
Original title:Analysis and Optimization of Bottleneck Features for Speaker Recognition
Title (cs):Analýza a optimalizace bottle-neck parametrů pro rozpoznávání mluvčího
Proceedings:Proceedings of Odyssey 2016
Conference:Odyssey 2016
Place:Bilbao, ES
Journal:Proceedings of Odyssey: The Speaker and Language Recognition Workshop, Vol. 2016, No. 06, 4 Rue des Fauvettes - Lous Tourils, F-66390 BAIXAS, FR
Publisher:International Speech Communication Association
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bottleneck features, speaker recognition
In this work, we studied whether not fully optimized networks trained for ASR could provide better bottleneck features for speaker recognition. Then, we analyzed the influence of different aspects (input features, short-term mean and variance normalization, "under-trained" DNNs) when training DNNs to optimize the performance of speaker recognition systems based on bottleneck features.We evaluated the performance of the resulting bottleneck features in the NIST SRE10, condition 5, female task.
Recently, Deep Neural Network (DNN) based bottleneck features proved to be very effective in i-vector based speaker recognition. However, the bottleneck feature extraction is usually fully optimized for speech rather than speaker recognition task. In this paper, we explore whether DNNs suboptimal for speech recognition can provide better bottleneck features for speaker recognition. We experiment with different features optimized for speech or speaker recognition as input to the DNN. We also experiment with under-trained DNN, where the training was interrupted before the full convergence of the speech recognition objective. Moreover, we analyze the effect of normalizing the features at the input and/or at the output of bottleneck features extraction to see how it affects the final speaker recognition system performance. We evaluated the systems in the SRE10, condition 5, female task. Results show that the best configuration of the DNN in terms of phone accuracy does not necessary imply better performance of the final speaker recognition system. Finally, we compare the performance of bottleneck features and the standard MFCC features in i-vector/PLDA speaker recognition system. The best bottleneck features yield up to 37% of relative improvement in terms of EER.
   author = {Alicia Lozano-Diez and Anna Silnova and Pavel Mat{\v{e}}jka
	and Ond{\v{r}}ej Glembek and Old{\v{r}}ich Plchot and Jan
	Pe{\v{s}}{\'{a}}n and Luk{\'{a}}{\v{s}} Burget and Joaquin
   title = {Analysis and Optimization of Bottleneck Features for Speaker
   pages = {352--357},
   booktitle = {Proceedings of Odyssey 2016},
   journal = {Proceedings of Odyssey: The Speaker and Language Recognition
   volume = {2016},
   number = {06},
   year = {2016},
   location = {Bilbao, ES},
   publisher = {International Speech Communication Association},
   ISSN = {2312-2846},
   language = {english},
   url = {}

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