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地面数字电视广播系统中的视频传输容错算法 被引量:2

Digital Terrestrial TV Broadcasting System with Enhanced Robustness
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摘要 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 。 In this paper,an error concealment scheme is developed to enhance the robustness of digital terrestrial TV broadcasting (DTTB).This scheme includes a low complexity error concealment algorithm,an effective reception for isolated I pictures,and an efficient detection of spatial/temporal activity.Specifically,the error concealment algorithm combines temporal motion compensation with block matching methodology to achieve effective concealment while keeping low complexity with small size of search window for block matching.Extensive simulations have verified that,even with high packet error rate,the proposed scheme may achieve efficient and robust video broadcasting over DTTB systems.
出处 《电子学报》 EI CAS CSCD 北大核心 2001年第z1期1812-1815,共4页 Acta Electronica Sinica
基金 国家重点基础研究项目 (No G1 9980 30 4 0 6) 国家自然科学基金项目 (No 60 0 72 0 0 8)
关键词 差错隐藏 MPEG-2 地面数字电视广播(DTTB) error concealment MPEG 2 DTTB
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