SIGNAL COMPRESSING SYSTEM
First Claim
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1. A video signal compression method comprising:
- transforming to output a set of video frequency coefficients of an individual sub-block;
quantizing to output a quantized set of video frequency coefficients;
scanning the quantized set of video frequency coefficients according to a scanning pattern which is selected from a plurality of scanning patterns to produce a set of reordered coefficients;
producing a scan selection signal indicating the scanning pattern;
entropy encoding the set of reordered coefficients and outputting an entropy encoded signal, andtransmitting the entropy encoded signal and the scan selection signal,wherein the scan selection signal is not entropy encoded.
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Abstract
A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient.
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Citations
2 Claims
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1. A video signal compression method comprising:
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transforming to output a set of video frequency coefficients of an individual sub-block; quantizing to output a quantized set of video frequency coefficients; scanning the quantized set of video frequency coefficients according to a scanning pattern which is selected from a plurality of scanning patterns to produce a set of reordered coefficients; producing a scan selection signal indicating the scanning pattern; entropy encoding the set of reordered coefficients and outputting an entropy encoded signal, and transmitting the entropy encoded signal and the scan selection signal, wherein the scan selection signal is not entropy encoded. - View Dependent Claims (2)
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Specification