Quantization noise suppression for encoder/decoder system

Details Quantization noise suppression for encoder/decoder system Quantization noise suppression for encoder/decoder system

1993-08-04

1995-09-19

Young, Brian K.

Coded data generation or conversion

Quantizer

H03M 700

Patent

active

054519543

ABSTRACT:
The invention relates in general to low bit-rate encoding and decoding of information such as audio information. More particularly, the invention relates to the suppression of quantizing noise which results from low bit-rate encoding and decoding of signal events such as transients. An encoder identifies intervals of an input signal in which a decoder is likely to generate audible artifacts caused by quantizing errors. Indications of these intervals are passed in the encoded signal to the decoder. The decoder uses these indications to eliminate quantizing artifacts by suppressing corresponding intervals in the output signal.

REFERENCES:
patent: 4464783 (1984-08-01), Beraud et al.
patent: 5109417 (1992-04-01), Fielder et al.
Schroeder, et al., "MSC: Stereo Audio Coding with CD-quality and 256 kBit/sec", IEEE Tran. Consumer Elec., Nov. 1987, pp. 512-519.
Brandenburg, "High Quality Sound Coding at 2.5 Bit/Sample," AES Convention, Apr. 1988, preprint 2582.

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