Speech parameter coding method and apparatus

Details Speech parameter coding method and apparatus Speech parameter coding method and apparatus

H - Electricity

03

M

H03M 7/30 (2006.01) G10L 19/02 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2061832

A speech parameter coding method and apparatus which can quantize a spectrum parameter of a speech signal with a smaller number of bits than ever. A dividing section divides a predetermined order number of spectrum parameters, obtained by division of a speech signal into frames, for each order number of spectrum parameters smaller than the divisional order number. A vector quantizing section searches codebooks for the divided spectrum parameters for each order number and outputs a plurality of candidates of codevector in order of magnitude from the minimum one. An accumulated distortion calculating section calculates accumulated distortions for the entire order number for combinations of codevectors. A minimum judging section selectively outputs a combination of codevectors which minimizes the accumulated distortion thereby to quantize the spectrum parameter.

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