Method for adaptively controlling the pitch gain of a vocoder's

Details Method for adaptively controlling the pitch gain of a vocoder's Method for adaptively controlling the pitch gain of a vocoder's

1996-05-17

1999-09-28

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704205, 704206, G10L 500

Patent

active

059603860

ABSTRACT:
A pitch gain of the adaptive codebook portion of a vocoder's encoder is monitored to determine when an instability condition is about to occur by examining a pitch gain value and an averaged pitch gain value. When an instability is likely, the output of a gain control unit is set to an adaptive gain control value. When an instability is unlikely, the gain control unit passes the pitch gain to its output unmodified.

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Speech and audio coding for wireless and network applications, edited by Bishnu S. Atal, Vladimir Cuperman, and Allen Gersho, 1993, by Kluwer Academic Publishers.
"A Correction for the instability problem," Westgate Lakas Hotel, Orlando, Florida, Apr. 23, 1996.

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