基于SVC的空域增强层帧级错误掩盖算法

基于SVC空域增强层宏块编码模式的特点，提出一种增强层帧级错误掩盖算法，综合利用层间预测信息和时域直接模式TD下的运动信息，预测丢失帧中的宏块是否采用TD模式编码运动信息。对于符合判决条件的宏块，使用TD模式来产生其运动矢量，以提高运动矢量恢复的精确度，从而提升丢失帧的错误掩盖效果。实验结果表明，与原JSVM算法相比，该算法以很小的运算复杂度，使增强层序列的解码PSNR平均提高了0.23 dB。

Frame Error Concealment Algorithm in Spatial Enhancement Layer Based on SVC

Based on characteristics of the macroblock mode in SVC spatial enhancement layer, a new algorithm is proposed. The algorithm synthetically utilizes the inter-layer prediction information and motion information of temporal direct mode to select the macroblocks that use temporal direct prediction mode to encode motion information. And the macroblocks according with the conditions recovers the motion vectors with temporal direct mode. Simulation result indicates that the proposed algorithm can increase the PSNR by 0.23 dB of enhancement layer, with slightly increasing of the computational complexity