Scalable video coding and decoding
    141.
    发明授权
    Scalable video coding and decoding 失效
    可扩展视频编码和解码

    公开(公告)号:US07586425B2

    公开(公告)日:2009-09-08

    申请号:US11775141

    申请日:2007-07-09

    IPC分类号: H03M7/40

    CPC分类号: H04N19/93 H04N19/13 H04N19/61

    摘要: A method for coding spatial and quality enhancement information in scalable video coding using variable length codes. Conventional systems have been capable of using variable length codes only with nonscalable video coding, In the present invention, the coded block pattern for each block of information, significance passes, and refinement passes can all be coded with different types of variable length codes. The present invention also provides for a variable length encoder/decoder that dynamically adapts to the actual symbol probability. The encoder/decoder of the present invention counts the number of times each symbol is coded. Based upon these counts, the encoder/decoder selects how many symbols to group when forming a code word. The encoder also uses these counts to select the specific codeword that should be used.

    摘要翻译: 一种使用可变长度码对可缩放视频编码中的空间和质量增强信息进行编码的方法。 传统的系统只能使用不可缩放的视频编码来使用可变长度码。在本发明中,每个信息块,重要性传递和细化遍的编码块模式都可以用不同类型的可变长度码进行编码。 本发明还提供了一种动态适应实际符号概率的可变长度编码器/解码器。 本发明的编码器/解码器对每个符号进行编码的次数进行计数。 基于这些计数,编码器/解码器在形成码字时选择要分组的符号数量。 编码器还使用这些计数来选择应使用的特定码字。

    SCALABLE VIDEO CODING AND DECODING
    142.
    发明申请
    SCALABLE VIDEO CODING AND DECODING 失效
    可扩展的视频编码和解码

    公开(公告)号:US20080048894A1

    公开(公告)日:2008-02-28

    申请号:US11775141

    申请日:2007-07-09

    IPC分类号: H03M7/40

    CPC分类号: H04N19/93 H04N19/13 H04N19/61

    摘要: A system and method for improved video encoding and decoding. The present invention addresses issues that arise in the H.264/AVC standard involving “high magnitude coefficients.” According to various embodiments of the present invention, an encoded end of block (EOB) symbol provides information comprising at least one of the maximum magnitude of values in a block, the number of values in the block with a magnitude greater than 1, and a variable length code (VLC) index indicating a VLC to be used in decoding precise magnitudes for non-zero values in the block. By including this information in the EOB symbol, improved coding efficiency is achieved.

    摘要翻译: 一种用于改进视频编码和解码的系统和方法。 本发明解决了涉及“高幅度系数”的H.264 / AVC标准中出现的问题。 根据本发明的各种实施例,编码的块结尾(EOB)符号提供包括块中最大值值中的至少一个,块中的值的数量大于1的信息,以及 可变长度码(VLC)索引,指示用于解码块中非零值的精确幅度的VLC。 通过将该信息包括在EOB符号中,实现了改进的编码效率。

    Method and apparatus for image detail enhancement without zigzagged edge artifact
    143.
    发明授权
    Method and apparatus for image detail enhancement without zigzagged edge artifact 失效
    不带锯齿形边缘伪影的图像细节增强的方法和装置

    公开(公告)号:US07333673B2

    公开(公告)日:2008-02-19

    申请号:US10697132

    申请日:2003-10-30

    申请人: Xianglin Wang

    发明人: Xianglin Wang

    IPC分类号: G06K9/40 G06K9/48 G09G5/00

    CPC分类号: G06T5/004

    摘要: A method and system for detecting slant edge areas in an image comprising a plurality of pixels, and for preventing zigzagged slant edge artifacts in an image detail enhancement process. Image pixels that belong to a slant image edge are detected and gain suppression factors are determined for the detected pixels. The image is detail enhanced while selectively reducing enhancement of the detected image pixels relative to enhancement of other image pixels based on the gain suppression factors.

    摘要翻译: 一种用于检测包括多个像素的图像中的倾斜边缘区域的方法和系统,并且用于在图像细节增强处理中防止锯齿形倾斜边缘伪像。 检测属于倾斜图像边缘的图像像素,并且为检测到的像素确定增益抑制因子。 图像是细节增强的,同时基于增益抑制因素选择性地减少检测到的图像像素相对于其他图像像素的增强的增强。

    Method and apparatus for detecting the location and luminance transition range of slant image edges
    144.
    发明授权
    Method and apparatus for detecting the location and luminance transition range of slant image edges 失效
    用于检测倾斜图像边缘的位置和亮度转变范围的方法和装置

    公开(公告)号:US07330592B2

    公开(公告)日:2008-02-12

    申请号:US10765529

    申请日:2004-01-27

    IPC分类号: G06K9/48 G06K9/40

    摘要: A system and method for detecting location and luminance transition range of slant image edge in a digital image. The variance value for the pixels inside a window in the image is calculated, based on which a current pixel is classified. If the current pixel is in a non-edge region, no further checking is needed, otherwise binary pattern data is generated from the pixels inside the window. Then it is determined whether the current pixel is a center pixel in a luminance transition range of a slant edge based on the binary pattern data at the current pixel location and its neighboring binary pattern data. If the current pixel is the center pixel in a luminance transition range of a slant edge, then the length of the luminance transition range of the slant edge is determined.

    摘要翻译: 一种用于检测数字图像中倾斜图像边缘的位置和亮度转变范围的系统和方法。 计算图像中的窗口内的像素的方差值,基于当前像素被分类。 如果当前像素处于非边缘区域,则不需要进一步检查,否则从窗口内的像素生成二进制图案数据。 然后,基于当前像素位置处的二进制图案数据及其相邻二进制图案数据,确定当前像素是否是倾斜边缘的亮度转变范围中的中心像素。 如果当前像素是倾斜边缘的亮度转变范围中的中心像素,则确定倾斜边缘的亮度转变范围的长度。

    Method and apparatus for entropy coding in fine granularity scalable video coding
    145.
    发明申请
    Method and apparatus for entropy coding in fine granularity scalable video coding 审中-公开
    用于精细粒度可伸缩视频编码的熵编码方法和装置

    公开(公告)号:US20070201550A1

    公开(公告)日:2007-08-30

    申请号:US11651910

    申请日:2007-01-09

    IPC分类号: H04B1/66 H04N11/04 H04N11/02

    摘要: An FGS entropy coding method is suitable for the case when the refinement coefficients at the FGS layer have different prediction from its base layer. When temporal prediction is used in FGS layer coding and the refinement coefficients at the FGS layer have different prediction from its base layer, drift problem may be caused if the FGS layer is partially decoded. Such drift problem may significantly affect coding performance. This new FGS entropy coding method that can solve or greatly alleviate such drift effect and therefore improve coding performance. Three different FGS methods can be used: FGS entropy coding based on spatial frequency location; FGS entropy coding for decoder oriented two-loop structure; and FGS entropy coding with block-confined coding pass.

    摘要翻译: FGS熵编码方法适用于当FGS层的细化系数与其基本层具有不同的预测时的情况。 当在FGS层编码中使用时间预测,并且FGS层的细化系数与其基本层具有不同的预测时,如果FGS层被部分解码,则可能引起漂移问题。 这种漂移问题可能会严重影响编码性能。 这种新的FGS熵编码方法可以解决或大大减轻这种漂移效应,从而提高编码性能。 可以使用三种不同的FGS方法:基于空间频率位置的FGS熵编码; 用于解码器取向的双环结构的FGS熵编码; 以及使用块限制编码的FGS熵编码。

    System and method for progressive quantization for scalable image and video coding
    146.
    发明申请
    System and method for progressive quantization for scalable image and video coding 审中-公开
    用于可缩放图像和视频编码的渐进式量化的系统和方法

    公开(公告)号:US20070147497A1

    公开(公告)日:2007-06-28

    申请号:US11490802

    申请日:2006-07-21

    IPC分类号: H04N11/04 H04N7/12

    CPC分类号: H04N19/126 H04N19/124

    摘要: An improved system and method for dequantizing progressively quantized signals in scalable image and video coding. A decoder performs simple dequantization, such as normal uniform dequantization, on coded content using a quantization index and a nominal quantization step size to obtain a nominal reconstruction level. The result is then adjusted by adding the reconstruction offset to obtain the final reconstruction value.

    摘要翻译: 一种用于在可缩放图像和视频编码中逐步量化信号的量化的改进的系统和方法。 解码器使用量化索引和标称量化步长对编码内容执行诸如正常均匀去量化的简单去量化,以获得标称重建级别。 然后通过添加重建偏移来获得最终重建值来调整结果。

    Method and apparatus for image detail enhancement using filter bank

    公开(公告)号:US07139036B2

    公开(公告)日:2006-11-21

    申请号:US10355721

    申请日:2003-01-31

    IPC分类号: H04N5/21

    CPC分类号: H04N5/208

    摘要: An image detail enhancement method and apparatus that is suitable for different types of digital images, regardless of their signal frequency range or noise level. The detail enhancement apparatus has multiple filters termed, detail filter bank. A detail filter can be e.g. a high pass filter (HPF) or a band pass filter (BPF). In a detail filter bank, each detail filter has a pass band covering a specific frequency range and can therefore be used to obtain the detail signal in the corresponding frequency range from the original signal. The detail signals from those detail filters can then be processed before added back to the original signal as enhancements. This provides image detail enhancement that is suitable for different types of digital images (regardless of their signal frequency range or noise level).

    FGS identification in scalable video coding
    149.
    发明申请
    FGS identification in scalable video coding 审中-公开
    可扩展视频编码中的FGS识别

    公开(公告)号:US20060233243A1

    公开(公告)日:2006-10-19

    申请号:US11402410

    申请日:2006-04-12

    摘要: A system and method for providing improved FGS identification in scalable video coding. According to the present invention, each FGS enhancement layer is assigned a unique dependency identifier and contains only FGS enhancement information. For subsequent enhancement layers, the base dependency identifier will point to either a base-quality layer or an FGS enhancement layer. Alternatively, two base dependency identifiers can be used. One identifier is used to identify the base quality layer, which does not contain FGS information, that is used for the prediction of coding mode and motion information for a subsequent enhancement layer. The other identifier is used to identify the FGS enhancement layer, which contains only FGS information, that is used for the prediction of sample and/or residual data for a subsequent enhancement layer.

    摘要翻译: 一种用于在可缩放视频编码中提供改进的FGS识别的系统和方法。 根据本发明,每个FGS增强层被分配唯一的相关性标识符,并且仅包含FGS增强信息。 对于随后的增强层,基本相关性标识符将指向基本质量层或FGS增强层。 或者,可以使用两个基本相关性标识符。 一个标识符用于识别不包含用于预测后续增强层的编码模式和运动信息的FGS信息的基本质量层。 另一个标识符用于识别仅包含FGS信息的FGS增强层,其用于预测后续增强层的样本和/或残差数据。