Method and apparatus for transforming and inverse-transforming image
    64.
    发明授权
    Method and apparatus for transforming and inverse-transforming image 有权
    用于变换和逆变换图像的方法和装置

    公开(公告)号:US08649624B2

    公开(公告)日:2014-02-11

    申请号:US13304073

    申请日:2011-11-23

    IPC分类号: G06K9/36 G06K9/46

    摘要: Provided are a method and apparatus for transforming an image, in which an input image is transformed into a frequency domain by selectively using a plurality of frequency transform algorithms according to a frequency characteristic of the input image. The method includes: selecting a frequency transform algorithm to be used for a current block from a plurality of frequency transform algorithms according to a result obtained by transforming frequencies of peripheral blocks adjacent to the current block; and transforming the current block into a frequency domain by using the selected frequency transform algorithm.

    摘要翻译: 提供了一种用于变换图像的方法和装置,其中通过根据输入图像的频率特性选择性地使用多个频率变换算法将输入图像变换为频域。 该方法包括:根据通过变换与当前块相邻的外围块的频率获得的结果,从多个频率变换算法中选择要用于当前块的频率变换算法; 并通过使用所选择的频率变换算法将当前块变换成频域。

    Method and apparatus for effectively compressing motion vectors in multi-layer structure
    66.
    发明授权
    Method and apparatus for effectively compressing motion vectors in multi-layer structure 失效
    多层结构中有效压缩运动矢量的方法和装置

    公开(公告)号:US08559520B2

    公开(公告)日:2013-10-15

    申请号:US13235012

    申请日:2011-09-16

    IPC分类号: H04N7/12

    CPC分类号: H04N19/53 H04N19/52

    摘要: A motion vector compression apparatus includes: a down-sampling module for down-sampling an original frame to have a size of a frame in each layer; a motion vector search module for obtaining a motion vector in which an error or a cost function is minimized with respect to the down-sampled frame; a reference vector generation module for generating a reference motion vector in a predetermined enhanced layer by means of a block of a lower layer corresponding to a predetermined block in the predetermined enhanced layer, and motion vectors in blocks around the block; and a motion difference module for calculating a difference between the obtained motion vector and the reference motion vector.

    摘要翻译: 运动矢量压缩装置包括:下采样模块,用于对原始帧进行下采样以具有每层中的帧的大小; 运动矢量搜索模块,用于获得相对于下采样帧最小化误差或成本函数的运动矢量; 参考矢量生成模块,用于通过与预定增强层中的预定块相对应的下层的块和在块周围的块中的运动矢量来生成预定增强层中的参考运动矢量; 以及用于计算所获得的运动矢量和参考运动矢量之间的差的运动差分模块。

    Method and apparatus for enhancing performance of entropy coding, video coding method and apparatus using the method
    67.
    发明授权
    Method and apparatus for enhancing performance of entropy coding, video coding method and apparatus using the method 失效
    用于增强熵编码性能的方法和装置,使用该方法的视频编码方法和装置

    公开(公告)号:US08514943B2

    公开(公告)日:2013-08-20

    申请号:US11509579

    申请日:2006-08-25

    IPC分类号: H04N7/12

    摘要: An apparatus for enhancing the performance of entropy coding in a multilayer-based codec and an entropy coding method includes obtaining a distribution of a second coefficient included in an area of a base layer corresponding to the block, selecting a lookup table which is appropriate to the obtained distribution among a plurality of lookup tables, and transforming the first coefficient into a value mapped to the selected lookup table.

    摘要翻译: 一种用于增强基于多层的编解码器中的熵编码的性能的装置和熵编码方法,包括获得包括在与该块对应的基本层的区域中的第二系数的分布,选择适合于该块的查找表 在多个查找表中获得分布,并将第一系数变换成映射到所选择的查找表的值。

    Method and apparatus for encoding and decoding based on intra prediction
    68.
    发明授权
    Method and apparatus for encoding and decoding based on intra prediction 失效
    基于帧内预测的编码和解码方法和装置

    公开(公告)号:US08391369B2

    公开(公告)日:2013-03-05

    申请号:US12016457

    申请日:2008-01-18

    申请人: Woo-jin Han

    发明人: Woo-jin Han

    IPC分类号: H04N7/12

    CPC分类号: H04N19/593 H04N19/61

    摘要: Provided are a method and apparatus for encoding and decoding based on intra prediction. In the method, information regarding a direction of intra prediction of a current block is encoded into one of a plurality of values, depending on whether the directions of intra prediction of neighboring blocks that have been encoded before encoding the current block are identical to one another and whether the direction of intra prediction of the current block is identical to those of the neighboring blocks. Accordingly, it is possible to increase the compression rate of intra prediction encoding with a higher probability.

    摘要翻译: 提供了一种基于帧内预测的编码和解码的方法和装置。 在该方法中,根据在当前块编码之前编码的相邻块的帧内预测方向是否彼此相同,将关于当前块的帧内预测方向的信息编码为多个值中的一个值 以及当前块的帧内预测方向是否与相邻块的帧内预测方向相同。 因此,可以以更高的概率提高帧内预测编码的压缩率。

    Method and apparatus for encoding/decoding motion vector
    69.
    发明授权
    Method and apparatus for encoding/decoding motion vector 有权
    用于编码/解码运动矢量的方法和装置

    公开(公告)号:US08369410B2

    公开(公告)日:2013-02-05

    申请号:US13553358

    申请日:2012-07-19

    IPC分类号: H04N7/12

    摘要: Provided are methods and apparatuses for encoding and decoding a motion vector. The method of encoding the motion vector includes: selecting, as a mode of encoding information about a motion vector predictor of the current block, a first mode in which information indicating the motion vector predictor from among at least one motion vector predictor is encoded or a second mode in which information indicating generation of the motion vector predictor based on blocks or pixels included in a previously encoded area adjacent to the current block is encoded; determining the motion vector predictor of the current block according to the selected mode and encoding the information about the motion vector predictor of the current block; and encoding a difference vector between the motion vector of the current block and the motion vector predictor of the current block.

    摘要翻译: 提供了用于对运动矢量进行编码和解码的方法和装置。 对运动矢量进行编码的方法包括:作为对当前块的运动矢量预测器的信息进行编码的模式,选择对从至少一个运动矢量预测器中的运动矢量预测器进行编码的信息进行编码的第一模式, 第二模式,其中编码基于与当前块相邻的先前编码区域中包括的块或像素的运动矢量预测器的生成的信息; 根据所选择的模式确定当前块的运动矢量预测器,并对关于当前块的运动矢量预测器的信息进行编码; 并且对当前块的运动矢量与当前块的运动矢量预测器之间的差矢量进行编码。

    Method and apparatus for adaptively selecting context model for entropy coding
    70.
    发明授权
    Method and apparatus for adaptively selecting context model for entropy coding 有权
    用于自适应选择熵编码的上下文模型的方法和装置

    公开(公告)号:US08351502B2

    公开(公告)日:2013-01-08

    申请号:US11405665

    申请日:2006-04-18

    IPC分类号: H04N7/12 H04N11/02 H04N11/04

    摘要: A method and apparatus for adaptively selecting a context model for entropy coding and a video decoder are provided. A method of coding a residual prediction flag indicating whether residual data for an enhancement layer block of a multi-layered video signal is predicted from residual data for a lower layer block corresponding to the residual data for the enhancement layer block includes the steps of calculating the energy of the residual data for the lower layer block, determining a coding method for the residual prediction flag according to the energy, and coding the residual prediction flag using the determined coding method.

    摘要翻译: 提供一种用于自适应地选择用于熵编码的上下文模型和视频解码器的方法和装置。 编码残差预测标志的方法,该残差预测标志指示用于与用于增强层块的残差数据相对应的下层块的残差数据的多层视频信号的增强层块的残差数据是否被预测包括以下步骤: 根据能量确定残差预测标志的编码方法,并使用所确定的编码方法对残差预测标记进行编码。