Patent ID: 7953150
Filing Date: 2011-05-31
Classification: H04N

Abstract:
1. 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×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.