Coding device and decoding device of speech signal, coding metho

Details Coding device and decoding device of speech signal, coding metho Coding device and decoding device of speech signal, coding metho

1997-11-25

1999-10-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704223, 704229, G10L 502

Patent

active

059743751

ABSTRACT:
A noise codebook selects a code most suitable to the characteristics of an input speech vector from an inside quantification table. Furthermore, a codebook renewal circuit determines a correlative value between a noise code selected by the noise codebook and the input speech vector, subsequently calculates a multiplication value for each of noise codes to generate a renewal code by using the multiplication value with respect to the code selected most frequently by the coding processing at the time of voice. Renewal processing is preformed by replacing a desired code of the codebook with the renewal code. Furthermore, the renewal code is sent to a multiplexing circuit together with a renewal flag value to be sent to a decoding device by using the superfluous bit portion of an unvoice frame.

REFERENCES:
patent: 5276765 (1994-01-01), Freeman et al.
patent: 5475712 (1995-12-01), Sasaki
patent: 5509102 (1996-04-01), Sasaki
patent: 5689615 (1997-11-01), Benyassine et al.
patent: 5778334 (1998-07-01), Ozawa et al.
patent: 5812965 (1998-09-01), Massaloux
Andrew DeJaco, William Gardner, Paul Jacobs, and Chong Lee, "QCELP: The North American CDMA Digital Cellular Variable Rate Speech Coding Standard", IEEE Workshop on Speech Coding for Telecommunication, pp. 5-6 (1993).

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