Speech coder/decoder

Details Speech coder/decoder Speech coder/decoder

2006-07-11

2006-07-11

McFadden, Susan (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S221000, C704S219000, C704S223000

Reexamination Certificate

active

07076424

ABSTRACT:
A coding parameter control circuit31computes frame length from bit rate and coding delay, and provides the computed frame length data to a CELP coding circuit32.On the basis of the computed frame length, the coding parameter control circuit32selects control parameters from a table, in which a plurality of control parameters for controlling the operation of the CELP coding circuit are set, on the basis of the bit rate, and provides the selected control parameters to the CELP coding circuit. The coding parameter control circuit provides the sub-frame length, and bit number distributed to the multi-pulse signal to the multi-pulse signal generation parameter setting circuit33.The multi-pulse signal coding parameter setting circuit33computes pulse number of multi-pulse excitation signal, pulse position candidates of each pulse and candidate positions thereof from the sub-frame length and bit number of multi-pulse signal.

REFERENCES:
patent: 5727122 (1998-03-01), Hosoda et al.
patent: 2004/0024595 (2004-02-01), Nomura

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