Patent ID: 6351492
Filing Date: 2002-02-26
Classification: H04N

Abstract:
A method, for use in a video signal encoder, for coding texture information of a video signal which includes the texture information and shape information on each of macroblocks, each macroblock having MÃ—M pixels and being dividable into P number of equal-sized subblocks, M and P being positive integers, respectively, comprising the steps of:(a) determining an encoding_type of a target macroblock based on the texture information thereof, wherein the encoding_type represents a more effective coding technique between a progressive and an interlaced coding techniques for encoding the texture information thereof; (b) re-forming the shape information and the texture information on the target macroblock in response to the encoding_type to generate re-formed shape information and re-formed texture information thereof, respectively; (c) detecting the re-formed shape information on a DCT-block basis to find a CBPY (coded block pattern type) bit number of the target macroblock, wherein the CBPY bit number is the number of bits for non-transparent subblocks, each non-transparent subblock having a subblock size and containing at least one object pixel; (d) if the CBPY bit number is not zero, transforming the re-formed texture information of the target macroblock into a set of transformation coefficients for each non-transparent subblock based on the CBPY bit number and quantizing the set of transformation coefficients to thereby produce a set of quantized transformation coefficients; (e) detecting the set of quantized transformation coefficients for said each non-transparent subblock to generate CBPY information for the target macroblock, wherein the CBPY information represents whether or not the set of quantized transformation coefficients for said each non-transparent subblock contains at least one non-zero component therein; and (f) multiplexing the encoding_type and the CBPY information for the target macroblock to generate a bit stream.