Device, method, and program for encoding/decoding of speech...

Details Device, method, and program for encoding/decoding of speech... Device, method, and program for encoding/decoding of speech...

G - Physics

10

L

G10L 19/00 (2006.01)

Patent

CA 2485547

A speech decoding device of the invention smoothes, in decoding speech signal in a voice-less period, RMS and filter coefficients which is discontinuously transmitted, and provides them to a synthesis filter. Thereby, it is capable of preventing discontinuous changing of the filter coefficient caused by the intermittent transmission of the filter coefficient. As a result, a quality of decoding can ba improved. Also, to remove an effect, caused by the smoothing process, from the filter coefficients or the RMS which arse transmitted in the pest frames, a smoothing factor is adjusted not to perform smoothing while a certain time period (or a certain number of frames) from when a transition is made from a voice period from a voice-less period, or when a decoded feature parameter satisfies a predetermined condition.

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