H.26L视频正向差错跟踪技术  

Forward Tracking of Errors in Video Based on H.26L

作　　者：蒋志平[1] 彭强[1] 李云峰[1] 

机构地区：[1]西南交通大学计算机与通信工程学院,四川成都610031

出　　处：《西南交通大学学报》2004年第2期229-233,共5页Journal of Southwest Jiaotong University

摘　　要：H.26L解码器端引入的差错掩盖技术在视频序列变化较为剧烈的情况下,效果并不十分理想.为更好地遏制差错的进一步传播,介绍了一种正向视频差错跟踪技术.这种技术只对当前帧中受到差错"污染"的宏块进行帧内编码,不会带来数据量的急剧增加.在此基础上提出了多帧分级更新策略,使得差错跟踪恢复后的数据量得以平滑地过渡.实验表明,该技术对于运动较为剧烈的图像的差错恢复效果较好.The error concealment technique introduced in H.26l decoder is not very effective on error resilience of high-motion pictures. An approach,named forward error tracking, compatible with the ITU-T video coding standard H.26L was introduced to stop the error propagation. The approach codes those corrupted macroblocks only by intra-update at the current frame to avoid too much increase in data volume. In addition, a new multi-frame updating method was proposed to get smooth data stream. The experimental result shows that this technique is effective to stop the error propagation of high-motion pictures.

关 键 词：视频 编码 差错跟踪 差错恢复 H.26L 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]