基于H.26L的视频抗误码方法研究

H.26L based error-resilience techniques for video communication

根据视频编码标准H 26L算法的新特点,基于用户自定义信息域,提出多种视频抗误码方法.在编码端根据视频信息的重要程度相应采用了自适应不等保护算法,当恢复视频仍有误码时,则在解码端使用时/空误码掩盖方法提高恢复视频质量.通过编解码端的信息交互,使用SP帧来防止误码扩散.在高误码率环境下,与只使用简单误码掩盖和BCH(511,493)码保护相比,综合使用文中给出的视频抗误码方法,恢复图像的峰值信噪比可以提高7～18dB.该算法与H 26L标准兼容,具有实用价值.

According to the new characteristics of the H.26L standard, several error-resilience techniques for video transmission are proposed, including adaptive unequal-protection based on the SEI (Supplemental Enhancement Information) domain, error concealment and interactive error-propagation prevention. Simulation results show that the video quality is obviously improved using the proposed techniques over variable and error-prone channels. Furthermore, these methods are compatible with H.26L, and can be used in practice.