Methods and apparatuses for adaptive loop filtering for reducing blocking artifacts
    1.
    发明授权
    Methods and apparatuses for adaptive loop filtering for reducing blocking artifacts 有权
    用于减少块伪影的自适应环路滤波的方法和装置

    公开(公告)号:US07551793B2

    公开(公告)日:2009-06-23

    申请号:US11035066

    申请日:2005-01-14

    IPC分类号: G06K9/36

    摘要: A loop filtering method and apparatus are provided. The loop filtering method includes: calculating blocking effect strength based on coding type information, which specifies the coding type of a block to be filtered, a motion vector of the block, and reference frame information, which identifies a reference frame; determining a filtering unit to be used for filtering the block based on the calculated blocking effect strength; and performing filtering on the block using the determined filtering unit. Accordingly, it is possible to provide high-quality HDTV images by determining whether to perform loop filtering and adjusting the degree of loop filtering in consideration of the characteristics of HDTV images.

    摘要翻译: 提供了一种环路滤波方法和装置。 环路滤波方法包括:基于编码类型信息计算阻塞效应强度,该编码类型信息指定要被滤波的块的编码类型,块的运动矢量和标识参考帧的参考帧信息; 基于所计算的阻挡效应强度来确定要用于过滤所述块的过滤单元; 以及使用所确定的滤波单元对所述块执行滤波。 因此,考虑到HDTV图像的特性,可以通过确定是否执行环路滤波和调整环路滤波的程度来提供高质量的HDTV图像。

    Integer transform matrix selection method in video coding and related integer transform method
    2.
    发明申请
    Integer transform matrix selection method in video coding and related integer transform method 审中-公开
    整数变换矩阵选择方法在视频编码和相关整数变换方法中的应用

    公开(公告)号:US20050213835A1

    公开(公告)日:2005-09-29

    申请号:US11081829

    申请日:2005-03-17

    CPC分类号: G06F17/147

    摘要: An integer transform method for image data compression in a video codec is provided. In compliance with the first Audio and Video Coding Standard (AVS) of China in which 8×8 DCT integer transform is adopted, an integer transform base selection method, which is used to evaluate the quality of transform bases with both de-correlation efficiency and energy concentration efficiency, is provided. Computation complexity is also considered in the selection procedure. Based on the method, two groups of 8×8 transform bases (5, 6, 4, 1) and (4, 5, 3, 1) are selected and a fast transform algorithm for these two groups is provided.

    摘要翻译: 提供了一种用于视频编解码器中的图像数据压缩的整数变换方法。 根据采用8×8 DCT整数变换的中国第一个音视频编码标准(AVS),采用整数变换基选择方法,用于评估变相基的质量与去相关效率和能量集中度 提供效率。 选择过程中也考虑了计算复杂度。 基于该方法,选择了两组8×8变换基(5,6,4,1)和(4,5,3,1),并提供了这两组的快速变换算法。

    Loop filtering method and apparatus
    3.
    发明申请
    Loop filtering method and apparatus 有权
    环路滤波方法及装置

    公开(公告)号:US20050196063A1

    公开(公告)日:2005-09-08

    申请号:US11035066

    申请日:2005-01-14

    摘要: A loop filtering method and apparatus are provided. The loop filtering method includes: calculating blocking effect strength based on coding type information, which specifies the coding type of a block to be filtered, a motion vector of the block, and reference frame information, which identifies a reference frame; determining a filtering unit to be used for filtering the block based on the calculated blocking effect strength; and performing filtering on the block using the determined filtering unit. Accordingly, it is possible to provide high-quality HDTV images by determining whether to perform loop filtering and adjusting the degree of loop filtering in consideration of the characteristics of HDTV images.

    摘要翻译: 提供了一种环路滤波方法和装置。 环路滤波方法包括:基于编码类型信息计算阻塞效应强度,该编码类型信息指定要被滤波的块的编码类型,块的运动矢量和标识参考帧的参考帧信息; 基于所计算的阻挡效应强度来确定要用于过滤所述块的过滤单元; 以及使用所确定的滤波单元对所述块执行滤波。 因此,考虑到HDTV图像的特性,可以通过确定是否执行环路滤波和调整环路滤波的程度来提供高质量的HDTV图像。