Error concealment apparatus for MPEG-like video data

Apparatus for processing motion compensated compressed video data wherein ones of frames of video signal are compressed according to intraframe processing and other frames of said video signal are compressed according to interframe processing, and wherein said intraframe and interframe processing generates compressed data on a block by block basis, and wherein motion vectors are generated for respective blocks of intraframe processed data, and respective motion vectors of intraframe processed blocks are attached to blocks of data other than blocks to which they respectively correspond, said apparatus comprising:

• a source of said motion compensated compressed video data;
• means for detecting errors in said motion compensated compressed video data and for discarding blocks of data including errors;
• means for separating said motion vectors from respective blocks of intraframe compressed data, and for storing said motion vectors in memory, and for applying blocks of intraframe compressed data without corresponding intraframe motion vectors to decompression means for decompression;
• means, responsive to said motion compensated compressed video data and said means for detecting errors, for providing blocks of synthesized data for said blocks of intraframe compressed data discarded by said means for detecting errors, said synthesized data formed using intraframe motion vectors corresponding to said discarded blocks, which said motion vectors are accessed from said memory;
• and
• means for substituting said blocks of synthesized data for corresponding said discarded blocks of intraframe compressed data.

Apparatus for processing motion compensated compressed video data wherein ones of frames of video signal are compressed according to intraframe processing and other frames of said video signal are compressed according to interframe processing, and wherein said intraframe and interframe processing generates compressed data on a block by block basis, and wherein motion vectors, MV.sub.intraframe, are generated for respective blocks of intraframe processed data, and respective motion vectors, MV.sub.intraframe, of intraframe processed blocks are attached to blocks of data other than blocks to which they respectively correspond, said apparatus comprising:

• a source of said motion compensated compressed video data;
• means for detecting errors in said motion compensated compressed video data and for discarding blocks of data including errors;
• means for separating motion vectors, MV.sub.intraframe, from said respective blocks of intraframe compressed data, for storing said motion vectors, MV.sub.intraframe, in memory, and for normally applying blocks of intraframe compressed data, without said motion vectors, MV.sub.intraframe, to decompression means for decompression;
• means, responsive to said means for detecting errors, and stored motion vectors, MV.sub.intraframe, in said memory, for generating substitute blocks of image data for discarded blocks of intraframe compressed data.