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    • 4. 发明申请
    • ADAPTIVE LOOP FILTERING
    • 自适应环路滤波
    • WO2012071417A1
    • 2012-05-31
    • PCT/US2011/061854
    • 2011-11-22
    • THOMSON LICENSINGCHEN, QianZHENG, YunfeiYIN, PengLU, XiaoanSOLE, Joel
    • CHEN, QianZHENG, YunfeiYIN, PengLU, XiaoanSOLE, Joel
    • H04N7/26G06T5/00H04N7/36
    • H04N19/86G06T5/002H04N19/439H04N19/51H04N19/82
    • Various implementations provide filtering for pictures. Several such implementations attempt to reduce artifacts caused by over-filtering in a decoding loop. Certain of these implementations provide multiple loop filters, and select a loop filter based on the result of a deblocking 5 filter. One particular implementation applies a first filter to a picture to produce a filtered picture. A second filter is selected based on a difference between a value of a particular pixel in the filtered picture and a value of a corresponding pixel in the picture. The second filter is applied to the particular pixel in the filtered picture. In another implementation, a signal or signal structure includes 10 an indication of the second filter, an encoding of at least a portion of a picture, and an encoding of at least a portion of a subsequent picture that has been encoded based on the output of the second filter above.
    • 各种实现为图片提供过滤。 几个这样的实现尝试减少由解码循环中的过滤引起的伪像。 这些实现中的某些实现提供多个环路滤波器,并且基于去块5滤波器的结果来选择环路滤波器。 一个特定的实施方案将第一滤波器应用于图像以产生滤波图像。 基于滤波图像中的特定像素的值与图像中的相应像素的值之间的差异来选择第二滤波器。 第二个滤波器被应用于滤波图像中的特定像素。 在另一实施方案中,信号或信号结构包括:第二滤波器的指示,图像的至少一部分的编码,以及基于输出的编码的后续图像的至少一部分的编码 上面的第二个过滤器。