Patent ID: 7072403

Claim:
A video decoding device for decoding a coded video signal which is supplied to the video decoding device as packets each of which containing a plurality of coded block data units which have been generated by encoding blocks each of which is composed of a predetermined number of pixels of a frame of a video signal, comprising: an error detection means for judging whether or not an error has occurred to each of the packets and outputting a judgment signal indicating the result of the judgment; a packet partitioning means for partitioning the packet after the error detection by the error detection means into the coded block data units, while outputting an address signal indicating addresses of blocks that have been contained in the packets to which the errors have occurred; a video decoding means for successively decoding the coded block data units and outputting a decoded video signal containing block data units obtained by the decoding of the coded block data units; a first invalid block judgment means for judging whether or not each of the block data units corresponding to the addresses indicated by the address signal from the packet partitioning means is an invalid block which has been decoded abnormally, based on pixel values of adjacent blocks; and a first invalid block concealment means for conducting a concealment process with regard to the block data units that have been judged by the first invalid block judgment means as invalid blocks.