【摘要】 提出一种基于无线传输信道的分级视频编码数据误码保护方案。该方案通过综合分析空间增强层数据、时间增强层数据、信噪比增强层数据的相对重要性,按重要性的不同将各增强层的数据归为3类,对不同级别数据采用不同冗余度的前向纠错保护方式。实验结果证明,该方案可以取得较好的传输效果,与传统的均匀误码保护及非均匀误码保护方案相比,可获得2 dB和0.5 dB的PSNR增益。更多还原

【Abstract】 This paper proposes a Unequal Error Protection(UEP) scheme for the scalable video with a combined spatial,temporal,and quality(SNR) scalability over wireless channels.The bit stream is divided into three types according to the importance to the reconstructed picture.Each sub-bit-stream is protected by unequal quantities of bits.Experimental results show the scheme can improve coding efficiency of PSNR by 2.0 dB and 0.5 dB compared with traditional Equal Error Protection(EEP) and UEP scheme.更多还原