Abstract: This paper studies the performance of H.264/AVC multi-generation coding, presents four mechanisms that contribute to the continued degradation: quantization-transform error, prediction mode re-estimation error, clipping error and deblocking error. To improve the multi-generation performance, it presents a multi-generation coding procedure by selecting the same prediction mode and disabling deblocking filter for each compression stage. Experimental results show that PSNR loss of multi-generation coding decreases 0.5 dB~1.4 dB.

Key words: H.264/AVC coding, multi-generation coding, performance

摘要： 研究H.264/AVC帧内重复编解码的性能，通过论证和实验把导致重复编解码PSNR损失的因素归纳为4个方面：量化-变换误差，预测模式再选择误差，Clipping误差和环路滤波误差。为了提高H.264/AVC帧内重复编解码的性能，通过选择相同的预测模式且不使用环路滤波的方法进行重复编码，实验结果表明该方法使重复编解码的PSNR损失减少0.5 dB~1.4 dB。

关键词: H.264/AVC编解码, 重复编解码, 性能

CLC Number: 

• TP37