Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1998-11-24
2000-09-12
Lee, Richard
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348390, H04N 712
Patent
active
061188220
ABSTRACT:
A compression system and process include adaptive quantization for selection of one quantizer, for each video frame or frame portion, from a group of quantizers, where each quantizer is a set of predefined quantizer values, and coding of the quantized values using a common entropy coding table for all quantizers, or a separate entropy coding table for each quantizer. The entropy coding tables are obtained during a training procedure. The selection of the quantizer is based on a formula which takes into account the distortion and bit rate characteristics of each quantizer. A similar formula, based on the distortion and bit rate characteristics, is used to select the particular quantizer value within the chosen quantizer for each video signal value being coded.
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Conexant Systems Inc.
Lee Richard
LandOfFree
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