H (H) .263 Error detection method in video bitstream

摘要

The present invention relates to a method and apparatus for efficiently detecting an error in an H.263 image bitstream reconstructed using intra-decoding (ITNRADC) information included in block data on a bit stream of an image frame, The present invention relates to a method for decoding an original image signal, which is obtained by restoring a original signal before being encoded through a decoding means, and successively performs a codeword search for a plurality of pieces of information included in each block Retrieving a codeword for INTRADC information of a predetermined bit; The INTRADC information in each block to be searched has a predetermined plurality of bit values having a predetermined bit length and checks whether the retrieved INTRADC information corresponds to one of a predetermined plurality of bit values; An error signal is not generated if the retrieved INTRADC information corresponds to any one of a predetermined plurality of bit values and an error signal is generated if not, and the error signal is provided to the error concealment and recovery means; And performing error detection in an image bitstream through error concealment and recovery in an error bit stream interval of the reconstructed image bit stream based on the generated error signal, It is possible to effectively detect the occurrence of an error in the error detection and error concealment and recovery using the same.