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电子学报  2001 

地面数字电视广播系统中的视频传输容错算法

, PP. 1812-1815

Keywords: 差错隐藏,MPEG-2,地面数字电视广播(DTTB)

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Abstract:

本文提出了一套针对MPEG-2视频压缩数据传输的自适应容错机制,用于支持地面数字电视广播系统中的可靠电视传输.具体地,本文首先提出了一种基于时域隐藏和块匹配的差错隐藏算法,在保持较好隐藏效果的同时,通过有效地减小搜索窗口而显著降低了算法复杂度.同时,针对独立I帧图像还提出了独特的差错隐藏方法.将这两种差错隐藏算法与低运算复杂度的空域/时域运动检测方法相结合,又衍生出一种自适应空/时域结合差错隐藏算法.仿真结果表明,本文提出的算法即使在很高的数据差错率情况下,仍然可以实现地面数字电视广播系统中可靠而高效的视频传输.

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