Patent ID: 7684490

Claim:
A video decoding method comprising: receiving at a receiver, a compressed video signal, the compressed video signal containing entropy encoded data representing a set of video spatial frequency coefficients of an individual sub-block using a scanning pattern of a plurality of scanning patterns, the scanning pattern scanning each of a plurality of sub-blocks having n×n coefficients, in the 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 the scanning pattern completely scans all coefficients of one of the plurality of sub-blocks before scanning another of the plurality of sub-blocks, and containing a scanning mode signal indicating the scanning pattern, the scanning mode signal not being entropy encoded and multiplexed with the entropy encoded data; extracting the entropy encoded data and the scanning mode signal from the received compressed video signal; decoding the entropy encoded data; determining the scanning pattern of the plurality of scanning patterns by using the scanning mode signal; scanning the entropy decoded data according to the determined scanning pattern to generate scanned video signal; dequantizing the scanned video signal; and inverse transforming the dequantized video signal.