Speech parameter encoder

Details Speech parameter encoder Speech parameter encoder

1994-12-12

1997-09-09

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704230, G10L 302, G10L 900

Patent

active

056664656

ABSTRACT:
A speech parameter encoder capable of encoding spectrum parameters at a bit rate of 1 kb/s or less with comparatively small amount of operations and memory capacity. A spectrum parameter calculation unit 130 derives a spectrum parameter representing the spectrum envelope of a discrete input speech signal through division thereof into frames each having a predetermined time length. A weighted coefficient calculation unit 150 derives a weighted coefficient corresponding to an auditory masking threshold value through derivation thereof from the speech signal. A spectrum parameter quantization unit 160 receives the weighted coefficient and the spectrum parameter and quantizes the spectrum parameter through search of a codebook such as to minimize the weighting distortion based on the weighted coefficient.

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