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US 2011/0085599 A1Published application
Signal compressing system
AssigneeSamsung Electronics Co., Ltd.
InventorsJe-Chang JEONG, Hen-Hee MUN
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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.
Claims3
A video signal compression apparatus, comprising:
- a transformer which outputs a set of video frequency coefficients of an individual sub-block;
- a quantizer which outputs a quantized set of video frequency coefficients;
- a scanner which is operative to scan the quantized set of video frequency coefficients according to a scanning pattern which is selected from a plurality of scanning patterns, the scanning pattern scanning each of a plurality of sub-blocks having n X n coefficients, in a following sequence:
- M(0,0), M(1,0), M(0,1), M(0,2), M(1,1), M(2,0), M(3,0), M(2,1), M(1,2), . . . , M(n−1,n−1), from lowest frequency to highest frequency to produce a set of reordered coefficients;
- and
- an entropy coder which is operative to entropy encode the set of reordered coefficients and output an entropy encoded signal,
- wherein the scanning pattern is indicated by a scan selection signal which is not entropy encoded.
4 more elements
Dependencies are inferred from the claim text.