关键词: 视频流传输, 数据分割, 视频容错, 误差扩散, 不等重错误保护

Abstract: In this paper,a novel data partitioning method is presented,aiming at reducing error propagation for video streaming.The proposed method modifies the approach defined in H.264,differentiating the importance level of every encoded macroblock by using the degree of the error propagation caused by the loss of the macroblock and then forming separate sub-bitstreams.Given the network bandwidth and packet loss rate,a bit rate allocation algorithm based on rate-distortion optimization is presented to protect individual sub-bitstreams at different levels,which enhances the possibility of correctly receiving the macroblocks of high level and improves the reconstructed quality of video streaming.The proposed method is easy to implement.Most important,the method effectively reduces the error propagation as packet loss happens.The simulations show that the proposed method gains 0.3-0.6dB than H.264 under the same channel conditions.

Key words: video streaming delivery, data partitioning, video error resilience, error propagation, UEP