Adaptive subband scaling method and apparatus for quantization b

Details Adaptive subband scaling method and apparatus for quantization b Adaptive subband scaling method and apparatus for quantization b

1997-01-23

1999-07-27

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704500, G10L 704, H04B 1400

Patent

active

059307501

ABSTRACT:
A signal encoding method for encoding input digital data by so-called high-efficiency encoding, wherein it is possible to suppress degradation in the sound quality in case of raising the compression ratio. The range of values of subband-based signal components for quantization to zero, to which a short codelength is given, is set so as to be larger. Consequently the ratio of the subband-based signal components quantized to values of a shorter codelength will become higher than if the subband-based signal components are quantized in such a manner as to minimize the total quantization error energy in each frequency band.

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