Vocoder with efficient, fault tolerant excitation vector...

Details Vocoder with efficient, fault tolerant excitation vector... Vocoder with efficient, fault tolerant excitation vector...

H - Electricity

04

N

H04N 7/32 (2006.01) G10L 19/12 (2006.01) H04N 7/28 (2006.01) G10L 19/00 (2006.01) G10L 19/06 (2006.01)

Patent

CA 2254620

A CELP vocoder efficiently encodes an excitation vector in a way that is less sensitive to single bit errors. Each of the pulses composing the excitation vector are limited to one of four predetermined positions. As a result, only three bits are required to encode each pulse (two bits for position and one sign bit) and) in addition, a single bit error only produces an error in one pulse.

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