摘要： 为提高可伸缩视频编码(SVC)在易错传输环境下的解码质量，研究帧内宏块刷新和参考帧选择2种容错技术，根据视频空间分层下SVC的层间预测特性，提出2种改进策略并进行对比。测试结果表明，在码率控制的情况下，改进的参考帧选择策略传输后重建图像的平均亮度峰值信噪比较高，更适用于低码率的传输环境。

关键词: 可伸缩视频编码, 反馈, H.264标准, 容错, 帧内刷新, 参考帧选择

Abstract: Aiming at the problems of the falling decoded video quality of Scalable Video Coding(SVC) under the error prone transmission network, this paper proposes the real-time feedback-based fault tolerant strategies suitable for low bit rate transmission. The strategies make full use of the inter-layer prediction of spatial layers and enhance feedback-based conventional intra Macro Block(MB) update and Reference Picture Selection(RPS) fault tolerant techniques. The strategies are tested by using SVC common test conditions, and results show that the strategy average Y-PSNR of decoded pictures is higher in rate control, and it is suitable to low bit rate transmission enviroment.

Key words: Scalable Video Coding(SVC), feedback, H.264 strandard, fault tolerant, intra update, Reference Picture Selection(RPC)

中图分类号: 

• TN919.8