Perceptual speech coder and method

Details Perceptual speech coder and method Perceptual speech coder and method

1995-06-01

1998-01-06

Safourek, Benedict V.

395 236, G10L 918

Patent

active

057063923

ABSTRACT:
Simultaneous and temporal masking of digital speech data is applied to an MBE-based speech coding technique to achieve additional, substantial compression of coded speech over existing coding techniques, while enabling synthesis of coded speech with minimal perceptual degradation relative to the human auditory system. A real-time perceptual coder and decoder is disclosed in which speech may be sampled at 10 kHz, coded at an average rate of less than 2 bits/sample, and reproduced in a manner that is perceptually transparent to a human listener. The coder compresses speech segments that are inaudible due to simultaneous or temporal masking, while audible speech segments are not compressed.

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