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公开(公告)号：EP2870759A1
公开(公告)日：2015-05-13
申请号：EP13740073.5
申请日：2013-06-30
发明人： NORKIN, Andrey
IPC分类号： H04N7/00
CPC分类号： H04N19/80 , H04N19/117 , H04N19/14 , H04N19/167 , H04N19/176 , H04N19/182 , H04N19/61 , H04N19/86
摘要： A deblocking filtering control comprises checking whether pixel values of four pixels (12, 22) in a line (15) of pixels (12, 22) in a block (10) of pixels (12) and in a neighboring block (20) of pixels (22) form an approximate line. If the pixel values of the four pixels (12, 22) in the line (15) of pixels (12, 20) in both the block (10) of pixels (12) and in the neighboring block (20) of pixels (22) form an approximate line the deblocking filtering control selects to apply strong deblocking filtering to pixel values in the line (15) of pixels (12, 22). The subject and objective quality of the deblocking filtering is thereby improved by applying strong deblocking filter to areas where the signal in a picture (1) not only has the form of a flat line but also form a ramp.
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公开(公告)号：EP2681913B1
公开(公告)日：2015-11-25
申请号：EP11808966.3
申请日：2011-12-16
IPC分类号： H04N19/176 , H04N19/117 , H04N19/14 , H04N19/82 , H04N19/86
CPC分类号： H04N19/86 , H04N19/117 , H04N19/14 , H04N19/176 , H04N19/82
摘要： A first filter decision value is calculated for a block (10) of pixels (11, 13, 15, 17) in a video frame based on pixel values of pixels (11, 13, 15) in a first line (12) of pixels (11, 13, 15, 17) in the block (10). A second filter decision value is also calculated for the block (10) based on pixel values of pixels (21, 23, 25, 27) in a corresponding first line (22) of pixels (21, 23, 25, 27) in a neighboring block (20) in the video frame. The first filter decision value is used to determine how many pixels in a line (12) of pixels (11, 13, 15, 17) in the block (10) to filter relative to a block boundary (1) between the block (10) and the neighboring block (20). The second filter decision value is used to determine how many pixels in a corresponding line (22) of pixels (21, 23, 25, 27) in the neighboring block to filter relative to the block boundary (1).
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公开(公告)号：EP2749025A2
公开(公告)日：2014-07-02
申请号：EP12791453.9
申请日：2012-11-08
发明人： NORKIN, Andrey , SJÖBERG, Rickard
IPC分类号： H04N7/26
CPC分类号： H04N19/00 , H04N19/117 , H04N19/119 , H04N19/146 , H04N19/156 , H04N19/17 , H04N19/174 , H04N19/197 , H04N19/42 , H04N19/86
摘要： A video encoder arranged to encode a video sequence, the video encoder comprising: a partitioning module arranged to partition the video sequence into tiles, wherein the tile size is greater than a predetermined minimum tile size; and at least one encoding module arranged to encode the tiles.
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公开(公告)号：EP2684355A1
公开(公告)日：2014-01-15
申请号：EP11709672.7
申请日：2011-03-10
摘要： The solution according to embodiments of the present invention is to reconstruct image blocks where only the frequency coefficient that is most sensitive to changes of an average value of the residual image block, typically the lowest frequency coefficient, is present with a flat residual image. The other image blocks are reconstructed by applying an inverse spatial 2D transform. Hence, the other image blocks comprise image blocks with multiple coefficients and image blocks with a single coefficient and wherein the single coefficient is not the coefficient determining (703) that is most sensitive to changes of an average value of the residual image block.
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公开(公告)号：EP2681913A1
公开(公告)日：2014-01-08
申请号：EP11808966.3
申请日：2011-12-16
IPC分类号： H04N7/26
CPC分类号： H04N19/86 , H04N19/117 , H04N19/14 , H04N19/176 , H04N19/82
摘要： A first filter decision value is calculated for a block (10) of pixels (11, 13, 15, 17) in a video frame based on pixel values of pixels (11, 13, 15) in a first line (12) of pixels (11, 13, 15, 17) in the block (10). A second filter decision value is also calculated for the block (10) based on pixel values of pixels (21, 23, 25, 27) in a corresponding first line (22) of pixels (21, 23, 25, 27) in a neighboring block (20) in the video frame. The first filter decision value is used to determine how many pixels in a line (12) of pixels (11, 13, 15, 17) in the block (10) to filter relative to a block boundary (1) between the block (10) and the neighboring block (20). The second filter decision value is used to determine how many pixels in a corresponding line (22) of pixels (21, 23, 25, 27) in the neighboring block to filter relative to the block boundary (1).
摘要翻译： 基于像素的第一行（12）中的像素（11,13,15）的像素值为视频帧中的像素（11,13,15,17）的块（10）计算第一滤波器判决值 （11），（13,13），（15），（17）。 还基于像素（21,23,25,27）中的像素（21,23,25,27）的对应第一行（22）中的像素（21,23,25,27）的像素值来计算块（10）的第二滤波器判决值， 相邻块（20）在视频帧中。 第一滤波器判决值用于确定块（10）中的像素（11,13,15,17）的行（12）中的多少像素相对于块（10）之间的块边界（1）进行滤波 ）和相邻块（20）。 第二滤波器判定值用于确定相邻块中的像素（21,23,25,27）的对应线（22）中的多少像素相对于块边界（1）进行滤波。
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公开(公告)号：EP2684355B1
公开(公告)日：2014-11-12
申请号：EP11709672.7
申请日：2011-03-10
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公开(公告)号：EP2532161A1
公开(公告)日：2012-12-12
申请号：EP10845363.0
申请日：2010-12-29
CPC分类号： H04N19/86 , H04N19/117 , H04N19/14 , H04N19/176 , H04N19/182 , H04N19/82
摘要： A block-specific filter decision value is calculated for a pixel block (10) in a video frame. If the block-specific filter decision value is below a block-specific threshold, each row or column (12) in the block (10) is individually processed in order to select between a strong and a weak de-blocking filter. A respective line-specific filter decision value is thereby calculated for each row or column (12) in the block (10) and compared to a line-specific threshold. If the line-specific filter decision value calculated for a row or column (12) is below the line-specific threshold a strong de-blocking filter is selected for the row or column (12), otherwise a weak de-blocking filter is instead selected to combat any blocking artifacts.
摘要翻译： 针对视频帧中的像素块（10）计算块特定的滤波器决策值。 如果块特定的滤波器判决值低于特定于块的阈值，则单独处理块（10）中的每一行或列（12）以便在强和弱的去块滤波器之间进行选择。 由此为块（10）中的每个行或列（12）计算相应的行特定的过滤器决策值，并与行特定的阈值进行比较。 如果针对行或列（12）计算的线特定滤波器决策值低于线特定阈值，则为行或列（12）选择强解块滤波器，否则替代弱解块滤波器 被选中以对付任何阻塞伪影。
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