Patent ID: 6563953
Filing Date: 2003-05-13
Classification: H04N

Abstract:
A computer-readable medium storing computer-executable instructions for causing a video decoder programmed thereby to perform a method of reconstructing one or more video images in a video sequence, the method comprising:for each macroblock of plural macroblocks, decoding a coded block pattern, wherein the coded block pattern includes first coded block pattern information for plural luminance blocks of the macroblock, wherein the coded block pattern includes second coded block pattern information for plural chrominance blocks of the macroblock, wherein the coded block pattern indicates which of the plural luminance blocks and the plural chrominance blocks have corresponding transform coefficient data in a bitstream, wherein each of the plural macroblocks has a macroblock type, wherein the macroblock type is intra for at least one of the plural macroblocks, and wherein the decoding comprises for each macroblock of the plural macroblocks: receiving an entropy code in the bitstream, wherein the received entropy code reflects joint entropy encoding of the first coded block pattern information together with the second coded block pattern information, and determining the coded block pattern for the macroblock based at least in part upon the received entropy code; and using the coded block pattern for each macroblock of the plural macroblocks during reconstruction of the one or more video images.