Channel selection measures for multi-microphone speech recognition
Channel selection measures for multi-microphone speech recognition (396,6Kb) (Restricted access) Request copy
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Rights accessRestricted access - publisher's policy
Automatic speech recognition in a room with distant microphones is strongly affected by noise and reverberation. In scenarios where the speech signal is captured by several arbitrarily located microphones the degree of distortion differs from one channel to another. In this work we deal with measures extracted from a given distorted signal that either estimate its quality or measure how well it fits the acoustic models of the recognition system. We then apply them to solve the problem of selecting the signal (i.e. the channel) that presumably leads to the lowest recognition error rate. New channel selection techniques are presented, and compared experimentally in reverberant environments with other approaches reported in the literature. Significant improvements in recognition rate are observed for most of the measures. A new measure based on the variance of the speech intensity envelope shows a good trade-off between recognition accuracy, latency and computational cost. Also, the combination of measures allows a further improvement in recognition rate.
CitationNadeu, C.; Wolf, M. Channel selection measures for multi-microphone speech recognition. "Speech communication", 01 Febrer 2014, vol. 57, p. 170-180.
|Channel selecti ... one speech recognition.pdf||Channel selection measures for multi-microphone speech recognition||396,6Kb||Restricted access|