Method and apparatus for enhancing performance of entropy coding, and video coding method and apparatus using the entropy coding performance enhancing method
    31.
    发明授权
    Method and apparatus for enhancing performance of entropy coding, and video coding method and apparatus using the entropy coding performance enhancing method 有权
    用于增强熵编码性能的方法和装置,以及使用熵编码性能增强方法的视频编码方法和装置

    公开(公告)号:US07348903B2

    公开(公告)日:2008-03-25

    申请号:US11486175

    申请日:2006-07-14

    IPC分类号: H03M7/40

    摘要: A method and apparatus for enhancing the performance of entropy coding in a multilayer-based codec system are provided. In a variable length coding method for lossless-coding first coefficients among coefficients of a discrete layer and one or more fine granular scalability (FGS) layers, the variable length coding method includes determining a proportion of zeros included in a predetermined unit region to which the first coefficients belong, selecting one of a plurality of grouping units depending on whether or not the proportion exceeds a predetermined threshold, grouping absolute values of the first coefficients using the selected grouping unit, and transforming the grouped absolute values into a code word mapped thereto by referring to a VLC table corresponding to the selected group unit.

    摘要翻译: 提供了一种用于在基于多层的编解码系统中增强熵编码性能的方法和装置。 在可变长度编码方法中,对离散层和一个或多个细粒度可伸缩性(FGS)层的系数中的第一系数进行无损编码,所述可变长度编码方法包括确定包括在预定单位区域中的零比例, 第一系数属于,根据比例是否超过预定阈值来选择多个分组单元之一,使用所选择的分组单元分组第一系数的绝对值,并将分组的绝对值转换成由 参考对应于所选择的组单元的VLC表。

    Method and apparatus for encoding and decoding video signal depending on characteristics of coefficients included in block of FGS layer
    32.
    发明申请
    Method and apparatus for encoding and decoding video signal depending on characteristics of coefficients included in block of FGS layer 审中-公开
    根据FGS层块中包含的系数的特征对视频信号进行编码和解码的方法和装置

    公开(公告)号:US20070133676A1

    公开(公告)日:2007-06-14

    申请号:US11590833

    申请日:2006-11-01

    IPC分类号: H04B1/66 H04N7/12

    摘要: Encoding and decoding video signals according to the characteristics of coefficients included in the block of a fine granularity scalability layer is provided. Non-unitary coefficients that constitute the block and have absolute values that are not 0 or 1 are extracted from the video signal, a representative value from run values of the extracted non-unitary coefficients is calculated, the run values of the coefficients constituting the block and the representative value are compared, and codewords are assigned to the coefficients according to a result of the comparison.

    摘要翻译: 提供根据包含在细粒度可伸缩层的块中的系数的特性对视频信号进行编码和解码。 从视频信号中提取构成块并且具有不为0或1的绝对值的非单位系数,计算提取的非单位系数的运行值的代表值,构成块的系数的运行值 并比较代表值,根据比较结果将码字分配给系数。

    Video coding method and apparatus supporting independent parsing
    33.
    发明申请
    Video coding method and apparatus supporting independent parsing 审中-公开
    支持独立解析的视频编码方法和装置

    公开(公告)号:US20070237240A1

    公开(公告)日:2007-10-11

    申请号:US11705431

    申请日:2007-02-13

    IPC分类号: H04N11/02

    摘要: An apparatus and method are provided for independently parsing fine granular scalability (FGS) layers. A video-encoding method according to an exemplary embodiment of the present invention includes a frame-encoding unit which generates at least one quality layer from an input video frame, a coding-pass-selecting unit which selects a coding pass according to a coefficient of a reference block spatially neighboring a current block in order to code a coefficient of the current block included in the quality layer, and a pass-coding unit which losslessly codes the coefficient of the current block according to the selected coding pass.

    摘要翻译: 提供了一种用于独立解析精细粒度可伸缩性(FGS)层的装置和方法。 根据本发明的示例性实施例的视频编码方法包括:帧编码单元,其从输入视频帧生成至少一个质量层;编码通过选择单元,其根据系数 空间上相邻于当前块的参考块,以便对包括在质量层中的当前块的系数进行编码;以及通过编码单元,其根据所选择的编码通过对当前块的系数进行无损编码。

    Video coding method and apparatus for reducing mismatch between encoder and decoder
    34.
    发明申请
    Video coding method and apparatus for reducing mismatch between encoder and decoder 审中-公开
    用于减少编码器和解码器之间的不匹配的视频编码方法和装置

    公开(公告)号:US20070014356A1

    公开(公告)日:2007-01-18

    申请号:US11487980

    申请日:2006-07-18

    IPC分类号: H04N7/12 H04B1/66

    摘要: A method of reducing mismatch between an encoder and a decoder in a motion compensated temporal filtering process and a video coding method and apparatus using the same. The video coding method includes the steps of dividing input frames into one final low-pass frame and at least one high-pass frame through a motion compensated temporal filtering, coding the final low-pass frame and then decoding the coded final low-pass frame, re-estimating the high-pass frame by using the decoded final low-pass frame, and coding the re-estimation high-pass frame.

    摘要翻译: 一种在运动补偿时间滤波处理中减少编码器与解码器之间的失配的方法,以及使用其的视频编码方法和装置。 视频编码方法包括以下步骤:通过运动补偿时间滤波将输入帧分成一个最终低通帧和至少一个高通帧,对最终的低通帧进行编码,然后对编码的最终低通帧进行解码 ,通过使用解码的最终低通帧来重新估计高通帧,以及对重估估高通帧进行编码。

    Video/image coding method and system enabling region-of-interest
    35.
    发明申请
    Video/image coding method and system enabling region-of-interest 审中-公开
    视频/图像编码方法和使用感兴趣区域的系统

    公开(公告)号:US20050152611A1

    公开(公告)日:2005-07-14

    申请号:US11033876

    申请日:2005-01-13

    IPC分类号: H04N7/34 H04N7/26 G06K9/36

    摘要: A method and apparatus for compressing a video/image using a region-of-interest (ROI), which allows only a particular region to be emphasized within a single frame during wavelet-based scalable video/image coding. The method includes generating wavelet coefficients by performing wavelet transform on an input image, rearranging the wavelet coefficients in wavelet blocks according to spatial relevancy among the wavelet coefficients, and quantizing the wavelet coefficients in each of the wavelet blocks. According to the method and apparatus, blocking artifacts occurring when an image is segmented into blocks and an ROI method is used can be remarkably decreased.

    摘要翻译: 一种使用感兴趣区域(ROI)来压缩视频/图像的方法和装置,其仅允许在基于小波的可缩放视频/图像编码期间在单个帧内强调特定区域。 该方法包括通过对输入图像进行小波变换来生成小波系数,根据小波系数之间的空间相关性重新排列小波块中的小波系数,并量化每个小波块中的小波系数。 根据该方法和装置,当图像被分割成块并且使用ROI方法时发生的块伪影可以显着降低。

    Method and apparatus for enhancing performance of entropy coding, video coding method and apparatus using the method
    36.
    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 of encoding flags in layer using inter-layer correlation, method and apparatus for decoding coded flags
    38.
    发明申请
    Method of encoding flags in layer using inter-layer correlation, method and apparatus for decoding coded flags 审中-公开
    使用层间相关编码层中标记的方法,用于解码编码标志的方法和装置

    公开(公告)号:US20070086516A1

    公开(公告)日:2007-04-19

    申请号:US11476103

    申请日:2006-06-28

    IPC分类号: H04B1/66 H04N7/12

    摘要: A method and apparatus for efficiently encoding diverse flags being used in a multilayer-based scalable video codec, based on an inter-layer correlation. The encoding method includes judging whether flags of a current layer included in a specified unit area are all equal to flags of a base layer, setting a specified prediction flag according to the result of judgment, and if it is judged that the flags of the current layer are equal to the flags of the base layer, skipping the flags of the current layer and inserting the flags of the base layer and the prediction flag into a bitstream.

    摘要翻译: 一种用于在基于层间相关性的基于多层的可伸缩视频编解码器中有效地编码各种标记的方法和装置。 编码方法包括:判断包含在指定单位区域中的当前层的标志是否全部等于基本层的标志,根据判断结果设定指定的预测标志,如果判断为当前的标志 层等于基本层的标志,跳过当前层的标志,并将基本层的标志和预测标记插入到比特流中。

    Method and apparatus for entropy encoding and entropy decoding fine-granularity scalability layer video data
    39.
    发明申请
    Method and apparatus for entropy encoding and entropy decoding fine-granularity scalability layer video data 审中-公开
    用于熵编码和熵解码细粒度可扩展层视频数据的方法和装置

    公开(公告)号:US20070071088A1

    公开(公告)日:2007-03-29

    申请号:US11525912

    申请日:2006-09-25

    IPC分类号: H04B1/66 H04N11/04

    摘要: Methods and apparatuses for entropy encoding and decoding Fine-granularity Scalability (FGS) layer video data are provided. The encoding method includes extracting residual data between a first block and a second block in a layer lower than the FGS layer corresponding to the first block; obtaining transform coefficients; dividing the transform coefficients in the first block into at least two subblocks; calculating the length of a prefix of first coefficients in the subblocks; and combining the prefix with a suffix used to distinguish the first coefficients; and VLC encoding the first coefficients. The encoding apparatus includes a subblock divider, a prefix generator, and a significant coefficient encoding unit. The decoding method includes calculating a range of a transform coefficient using a length of a prefix of the transform coefficient; extracting a value of the transform coefficient; VLC decoding the value; and combining first and second subblocks having the decoded coefficients.

    摘要翻译: 提供熵编码和解码的方法和装置细粒度可扩展性(FGS)层视频数据。 所述编码方法包括:在与所述第一块相对应的所述FGS层以下的层中提取第一块与第二块之间的残差数据; 获得变换系数; 将第一块中的变换系数划分为至少两个子块; 计算子块中第一系数的前缀的长度; 以及将前缀与用于区分第一系数的后缀组合; 和VLC编码第一系数。 编码装置包括子块分割器,前缀生成器和有效系数编码单元。 解码方法包括使用变换系数的前缀的长度来计算变换系数的范围; 提取变换系数的值; VLC解码值; 以及组合具有解码系数的第一和第二子块。

    Video coding method and apparatus
    40.
    发明申请
    Video coding method and apparatus 审中-公开
    视频编码方法及装置

    公开(公告)号:US20060088222A1

    公开(公告)日:2006-04-27

    申请号:US11247147

    申请日:2005-10-12

    IPC分类号: G06K9/36

    摘要: A video coding method and apparatus are provided for improving compression efficiency or video/image quality by selecting a spatial transform method suitable for characteristics of an incoming video/image during video/image compression. The video coding apparatus includes a temporal transform module for removing temporal redundancy in an input frame to generate a residual frame, a wavelet transform module for performing wavelet transform on the residual frame to generate a wavelet coefficient, a Discrete Cosine Transform (DCT) module for performing DCT on the wavelet coefficient of each DCT block to create a DCT coefficient, and a quantization module for quantizing the DCT coefficient.

    摘要翻译: 提供一种用于通过在视频/图像压缩期间选择适合于输入视频/图像的特性的空间变换方法来提高压缩效率或视频/图像质量的视频编码方法和装置。 视频编码装置包括用于消除输入帧中的时间冗余以产生残余帧的时间变换模块,用于对残差帧执行小波变换以生成小波系数的小波变换模块,用于产生小波系数的离散余弦变换(DCT)模块 对每个DCT块的小波系数执行DCT以产生DCT系数,以及用于量化DCT系数的量化模块。