Speech recognition in the blind condition based on multiple directivity patterns using a microphone array

Toshiyuki Sekiya, Tetsunori Kobayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A novel hands free speech recognition method using a microphone array is proposed and is applied to the multi-talk recognition in the blind condition, no prior information about the sound sources and the characteristics of room acoustics. The proposed system is constructed by the cascade of the sound localization system, MUSIC, and the sound segregation system, SMDP (Segregation using Multiple Directivity Patterns) proposed in our previous paper. SMDP is characterized by using redundant directivity patterns. Usually, it is difficult for this sort of cascade system to achieve high performance because the sound localization stage cannot be perfect and errors occurred in this first stage cause serious damages to the segregation stage. Particularly missing the sound source is critical. By arranging the virtual sound sources, we treat the excess sound sources. In the proposed method, contrarily, the errors in the localization stage hardly cause the problems as long as they are insertion. SMDP uses redundant directivity patterns from the first, so it tolerates the insertion errors. The proposed method achieved 70% word accuracy in the double-talk recognition experiment of 20 K vocabulary, which is 18 point better compared to the ICA-based blind source separation with the source-number-given condition.

Original languageEnglish
Title of host publication2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05 - Proceedings - Image and Multidimensional Signal Processing Multimedia Signal Processing
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesI373-I376
ISBN (Print)0780388747, 9780780388741
DOIs
Publication statusPublished - 2005 Jan 1
Event2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05 - Philadelphia, PA, United States
Duration: 2005 Mar 182005 Mar 23

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
VolumeI
ISSN (Print)1520-6149

Conference

Conference2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05
CountryUnited States
CityPhiladelphia, PA
Period05/3/1805/3/23

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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    Sekiya, T., & Kobayashi, T. (2005). Speech recognition in the blind condition based on multiple directivity patterns using a microphone array. In 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05 - Proceedings - Image and Multidimensional Signal Processing Multimedia Signal Processing (pp. I373-I376). [1415128] (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; Vol. I). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICASSP.2005.1415128