关键词: 错误掩盖, 检测, 失真度估计, H.264/AVC

Abstract: In order to reduce the influence of transmission errors on the reconstructed image quality in decoder, a novel adaptive error concealment algorithm based on scene change detection for intra frames of H.264/AVC is proposed. The distribution difference of intra prediction mode for H.264/AVC is used to detect scene change. Then distortion estimation is carried out for these intra frames not happened at the moment of scene change. Finally, combined with distortion estimation, the new method adaptively selects the spatial-temporal error concealment schemes. Simulation results show that the presented algorithm can use the high correlation of adjacent frames sequence and effectively suppresses error propagation. Compared with other conventional methods, the proposed algorithm can achieve 1~2 dB gain in terms of average PSNR and provides much better error concealment results.

Key words: error concealment, scene change detection, distortion estimation, H.264/AVC