H.26L视频正向差错跟踪技术
Forward Tracking of Errors in Video Based on H.26L
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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.Abstract: 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 newmulti-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.
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Key words:
- video /
- coding /
- error tracking /
- error resilience /
- H.26L
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