关键词: 抗差错, 预测帧刷新, 场景参考帧, 视频传输, 无线网络

Abstract:

In order to avoid the error propagation due to packet loss and bit error during the video transmission in wireless network , a novel error-resilient scheme with predictive frame refreshment is proposed based on scene-context reference frame. By segmenting the video sequences , the corresponding predictive frames locating at the original frames and needing to be intra-frame refreshed are predictably coded based on the scene-context reference frame within the same scene scope. The predictive frame refreshment is then implemented by means of the scene-flag and refresh-signal synchronization between the encoder and the decoder. As compared with the traditional intra-frame refreshment method , the proposed scheme can obviously reduce the frame bit rate with a similar reconstructed video quality when the video transmits over an unreliable wireless network that requires high intra-frame refreshment rate.

Key words: error resilience, predictive frame refreshment, scene-context reference frame, video transmission, wireless network