System, method and computer-readable medium for encoding a signal into macroblocks
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United States of America Patent
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Issued Date -
Nov 3, 2016
app pub date -
Jul 11, 2016
filing date -
Feb 14, 1997
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Abstract
A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small.
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