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    • 38. 发明授权
    • Systems and methods for decoding redundant motion vectors in compressed video bitstreams
    • 用于在压缩视频比特流中解码冗余运动矢量的系统和方法
    • US08135067B2
    • 2012-03-13
    • US11657466
    • 2007-01-25
    • Chang-Su KimIoannis Katsavounidis
    • Chang-Su KimIoannis Katsavounidis
    • H04B1/66
    • H03M7/30H03M7/40H03M13/00H04N5/147H04N19/29H04N19/573H04N19/65H04N21/234318H04N21/236H04N21/434H04N21/44012H04W84/14
    • The invention is related to methods and apparatus that decode robustly encoded video bitstreams. One embodiment of a decoder can advantageously reconstruct a predictive-coded video object plane (P-VOP) from a standard motion vector and the previous frame; from a redundant motion vector and a frame prior to the previous frame; or from both. Advantageously, this permits the decoder to display a frame based on a reconstructed VOP in the presence of unfavorable environmental conditions, such as interference, delays, and the like, which could otherwise corrupt a previous frame that is used as a reference by a standard decoder, such as a standard MPEG-4 decoder. One embodiment is advantageously backwards compatible with standard MPEG-4 compliant bitstreams and retrieves redundant motion vector information from user data video packets. One embodiment includes at least one extra frame buffer or memory, which stores a reference frame corresponding to a redundant motion vector.
    • 本发明涉及对鲁棒编码的视频比特流进行解码的方法和装置。 解码器的一个实施例可以有利地从标准运动矢量和先前帧重建预测编码视频对象平面(P-VOP); 从冗余运动矢量和前一帧之前的帧; 或从两者。 有利地,这允许解码器在存在不利的环境条件(例如干扰,延迟等)的情况下基于重构的VOP显示帧,否则可能会破坏用作标准解码器的参考的先前帧 ,如标准MPEG-4解码器。 一个实施例有利地与标准MPEG-4兼容比特流向后兼容,并从用户数据视频分组中检索冗余运动矢量信息。 一个实施例包括至少一个额外的帧缓冲器或存储器,其存储对应于冗余运动矢量的参考帧。