Speech coding with comfort noise variability feature for...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

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C704S233000, C704S223000

Reexamination Certificate

active

07124079

ABSTRACT:
The quality of comfort noise generated by a speech decoder during non-speech periods is improved by modifying comfort noise parameter values normally used to generate the comfort noise. The comfort noise parameter values are modified in response to variability information associated with a background noise parameter. The modified comfort noise parameter values are then used to generate the comfort noise.

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IEEE Communications Magazine; vol. 35, No. 9, Sep. 1997; Benyassine, A.; Shlomot, E.; Su, H.; “ITU-T Recommendation G.729 Annex B: A Silence Compression Scheme for Use with G.729 Optimized for V.70 Digital Simultaneous Voice and Data Applications”; pp. 64-71.
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ISR PCT/SE 99/02023; Completed May 9, 2000.

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