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    • 2. 发明申请
    • Method of and apparatus for lossless video encoding and decoding
    • 无损视频编码和解码的方法和装置
    • US20070065026A1
    • 2007-03-22
    • US11516603
    • 2006-09-07
    • Yung-lyul LeeDae-yeon KimKi-hun HanJao-ho Hur
    • Yung-lyul LeeDae-yeon KimKi-hun HanJao-ho Hur
    • G06K9/36
    • H04N19/12H04N19/147H04N19/176H04N19/593H04N19/61
    • Provided are a method of and apparatus for lossless video encoding and decoding, in which a differential residual block generated by calculating a difference between pixels of a residual block resulting from interprediction is encoded, thereby improving the compression rate. The method of lossless video encoding includes performing interprediction between a reference frame and a current frame in units of a predetermined-size block to generate a predicted block of a current block to be encoded, generating a residual block composed of residual signals corresponding to differences between pixels of the predicted block and the current block, calculating differences between the residual signals of the residual block in a predetermined direction and generating a differential residual block based on the calculated differences, and performing entropy-encoding on the differential residual block.
    • 提供了一种用于无损视频编码和解码的方法和装置,其中通过计算由间隔预测产生的残差块的像素之间的差异而产生的差分残差块被编码,从而提高了压缩率。 无损视频编码的方法包括以预定大小的块为单位执行参考帧和当前帧之间的间隔预测,以产生要编码的当前块的预测块,产生由对应于 计算预测块和当前块的像素,计算在预定方向上的残差块的残差信号之间的差异,并基于计算的差产生差分残差块,并对差分残差块进行熵编码。
    • 6. 发明申请
    • ENCODING METHOD, DECODING METHOD AND APPARATUS THEREOF
    • 编码方法,解码方法及其设备
    • US20110150072A1
    • 2011-06-23
    • US12883735
    • 2010-09-16
    • Ki-Hun HAN
    • Ki-Hun HAN
    • H04N7/26
    • H04N19/124H04N19/15H04N19/196H04N19/51
    • Video encoding and decoding methods and devices are provided which can efficiently switch a lossy mode and a lossless mode to each other. The video encoding device includes: a prediction section that generates a residual signal which is a difference between an input image and prediction values acquired by performing one or more of temporal prediction and spatial prediction on macro blocks of the input image; a transformation and quantization section that performs or skips transformation and quantization on the residual signal depending on mode information; an entropy-coding section that entropy-codes the residual signal output from the transformation and quantization section to generate a bitstream; a lossless-mode QP range determining section that determines a lossless-mode QP range using an amount of bits generated by the entropy-coding section and a quantization coefficient (QP); and a mode determining section that compares a current QP value with the determined lossless-mode QP range to determine one of a lossy mode and a lossless mode and transmits information on the determined mode to the transformation quantization section. Accordingly, by designating a lossless-mode quantization coefficient range, it is possible to reduce an amount of bits necessary for switching a lossy mode and a lossless mode.
    • 提供了可以有效地将有损模式和无损模式相互切换的视频编码和解码方法和装置。 视频编码装置包括:预测部,其生成作为输入图像与通过对输入图像的宏块执行时间预测和空间预测的一个或多个获取的预测值之间的差的残差信号; 变换和量化部分,其根据模式信息执行或跳过对残余信号的变换和量化; 熵编码部,对从所述变换和量化部输出的残留信号进行熵编码,生成比特流; 无损模式QP范围确定部,其使用由熵编码部生成的位数和量化系数(QP)来确定无损模式QP范围; 以及模式确定部分,其将当前QP值与所确定的无损模式QP范围进行比较,以确定有损模式和无损模式之一,并将关于所确定的模式的信息发送到变换量化部分。 因此,通过指定无损模式量化系数范围,可以减少切换有损模式和无损模式所需的位数。
    • 7. 发明授权
    • Method of and apparatus for lossless video encoding and decoding
    • 无损视频编码和解码的方法和装置
    • US07738714B2
    • 2010-06-15
    • US11516603
    • 2006-09-07
    • Yung-lyul LeeDae-yeon KimKi-hun HanJae-ho Hur
    • Yung-lyul LeeDae-yeon KimKi-hun HanJae-ho Hur
    • G06K9/36
    • H04N19/12H04N19/147H04N19/176H04N19/593H04N19/61
    • Provided are a method of and apparatus for lossless video encoding and decoding, in which a differential residual block generated by calculating a difference between pixels of a residual block resulting from interprediction is encoded, thereby improving the compression rate. The method of lossless video encoding includes performing interprediction between a reference frame and a current frame in units of a predetermined-size block to generate a predicted block of a current block to be encoded, generating a residual block composed of residual signals corresponding to differences between pixels of the predicted block and the current block, calculating differences between the residual signals of the residual block in a predetermined direction and generating a differential residual block based on the calculated differences, and performing entropy-encoding on the differential residual block.
    • 提供了一种用于无损视频编码和解码的方法和装置,其中通过计算由间隔预测产生的残差块的像素之间的差异而产生的差分残差块被编码,从而提高了压缩率。 无损视频编码的方法包括以预定大小的块为单位执行参考帧和当前帧之间的间隔预测,以产生要编码的当前块的预测块,产生由对应于 计算预测块和当前块的像素,计算在预定方向上的残差块的残差信号之间的差异,并基于计算的差产生差分残差块,并对差分残差块进行熵编码。