SPATIAL ERROR CONCEALMENT BASED ON THE INTRA-PREDICTION MODES TRANSMITTED IN A CODED STREAM

摘要

SPATIAL CONCEALMENT OF ERRORS IN AN INTRA PICTURE COMPRISED OF A STREAM OF MACROBLOCKS (120) IS ACHIEVED BY PREDICTING THE MISSING DATA IN MACROBLOCK BASED ON AN INTRA PREDICTION MODE SPECIFIED IN NEIGHBORING BLOCKS. IN PRACTICE, WHEN MACROBLOCKS WITHIN A STREAM ARE CODED BY A BLOCK-BASED CODING TECHNIQUE, SUCH AS CODING TECHNIQUE SPECIFIED IN THE H.264 ISO/ITU STANDARD, A MACROBLOCK CAN BE PREDICTED FOR CODING PURPOSES BASED ON NEIGHBORING INTRA PREDICTION MODES SPECIFIED BY THE CODING TECHNIQUE. THE PRESENT TECHNIQUE UTILIZES THE INTRA PREDICTION MODE INFORMATION NORMALLY USED IN CODING FOR SPATIAL ERROR CONCEALMENT PURPOSES. WHEN THE CODED DATA REFERRING TO A PARTICULAR MACROBLOCK IS LOST, THE INTRA PREDICTION MODES FROM NEIGHBORING MACROBLOCKS CAN PROVIDE IMPORTANT INFORMATION ABOUT WHICH IS THE BEST INTERPOLATION DIRECTION FOR CONCEALMENT.