REGIONS OF INTEREST FOR QUALITY ADJUSTMENTS
    52.
    发明申请
    REGIONS OF INTEREST FOR QUALITY ADJUSTMENTS 有权
    质量调整区域

    公开(公告)号:US20120269266A1

    公开(公告)日:2012-10-25

    申请号:US13539730

    申请日:2012-07-02

    IPC分类号: H04N7/26

    摘要: Quality settings established by an encoder are adjusted based on information associated with regions of interest (“ROIs”). For example, quantization step sizes can be reduced (to improve quality) or increased (to reduce bit rate). ROIs can be identified and quality settings can be adjusted based on input received from a user interface. An overlap setting can be determined for a portion of a picture that corresponds to an ROI overlap area. For example, an overlap setting is chosen from step sizes corresponding to a first overlapping ROI and a second overlapping ROI, or from relative reductions in step size corresponding to the first ROI and the second ROI. ROIs can be parameterized by information (e.g., using data structures) that indicates spatial dimensions of the ROIs and quality adjustment information (e.g., dead zone information, step size information, and quantization mode information).

    摘要翻译: 基于与兴趣区域(ROI)相关联的信息来调整由编码器建立的质量设置。 例如,可以减小量化步长(提高质量)或增加(以减少比特率)。 可以识别ROI,并且可以基于从用户界面接收的输入来调整质量设置。 可以针对对应于ROI重叠区域的图像的一部分来确定重叠设置。 例如,从与第一重叠ROI和第二重叠ROI相对应的步长尺寸或从与第一ROI和第二ROI对应的步长的相对减小中选择重叠设置。 可以通过指示ROI的空间维度和质量调整信息(例如,死区信息,步长信息和量化模式信息)的信息(例如,使用数据结构)对ROI进行参数化。

    COMPLEXITY-BASED ADAPTIVE PREPROCESSING FOR MULTIPLE-PASS VIDEO COMPRESSION
    54.
    发明申请
    COMPLEXITY-BASED ADAPTIVE PREPROCESSING FOR MULTIPLE-PASS VIDEO COMPRESSION 有权
    用于多通道视频压缩的基于复杂度的自适应预处理

    公开(公告)号:US20080192822A1

    公开(公告)日:2008-08-14

    申请号:US11673516

    申请日:2007-02-09

    IPC分类号: H04N7/12

    摘要: Multiple-pass video encoding systems and techniques are described which utilize statistics taken during a first-pass encoding to create complexity measurements for video data which is to be encoded. By analyzing these complexity measurements, preprocessing decisions, such as, for example, the determination of strength of denoise filters, can be made with greater accuracy. In one implementation, these complexity measurements take the form of calculation of temporal and spatial complexity parameters, which are then used to compute a unified complexity parameter for each group of pictures being encoded.

    摘要翻译: 描述了多通道视频编码系统和技术,其利用在一次通过编码期间进行的统计以创建要被编码的视频数据的复杂度测量。 通过分析这些复杂性测量,可以更准确地进行预处理决策,例如去噪滤波器的强度的确定。 在一个实现中,这些复杂度测量采用时间和空间复杂度参数的计算形式,然后将其用于为正被编码的每组图像计算统一的复杂度参数。

    Dynamic selection of motion estimation search ranges and extended motion vector ranges
    55.
    发明授权
    Dynamic selection of motion estimation search ranges and extended motion vector ranges 有权
    运动估计搜索范围和扩展运动矢量范围的动态选择

    公开(公告)号:US08494052B2

    公开(公告)日:2013-07-23

    申请号:US11400051

    申请日:2006-04-07

    IPC分类号: H04N11/02

    CPC分类号: H04N19/192 H04N19/51

    摘要: Techniques and tools for selecting search ranges and/or motion vector ranges during motion estimation are described. For example, a video encoder performs motion estimation constrained by a first search range, which results in multiple motion vectors. The encoder computes motion vector distribution information for the motion vectors. To compute the distribution information, the encoder can track the motion vectors in a histogram and count how many of the motion vectors fall within each of multiple intervals for the distribution information. The encoder then selects a second search range and performs motion estimation constrained by the second search range. Selecting the second search range can include selecting a motion vector range, which in some cases in effect determines the second search range.

    摘要翻译: 描述了在运动估计期间选择搜索范围和/或运动矢量范围的技术和工具。 例如,视频编码器执行由第一搜索范围约束的运动估计,其导致多个运动矢量。 编码器计算运动矢量的运动矢量分布信息。 为了计算分布信息,编码器可以跟踪直方图中的运动矢量,并计算多少个运动矢量落在分布信息的多个间隔的每一个中。 然后,编码器选择第二搜索范围并执行受第二搜索范围约束的运动估计。 选择第二搜索范围可以包括选择运动矢量范围,其在某些情况下有效地确定第二搜索范围。

    Signaling coding and display options in entry point headers
    56.
    发明授权
    Signaling coding and display options in entry point headers 有权
    入口点标题中的信号编码和显示选项

    公开(公告)号:US07924921B2

    公开(公告)日:2011-04-12

    申请号:US10989845

    申请日:2004-11-15

    摘要: A decoder receives an entry point header comprising plural control parameters for an entry point segment corresponding to the entry point header. The entry point header is in an entry point layer of a bitstream comprising plural layers. The decoder decodes the entry point header. The plural control parameters can include various combinations of control parameters such as a pan scan on/off parameter, a reference frame distance on/off parameter, a loop filtering on/off parameter, a fast chroma motion compensation on/off parameter, an extended range motion vector on/off parameter, a variable sized transform on/off parameter, an overlapped transform on/off parameter, a quantization decision parameter, and an extended differential motion vector coding on/off parameter, a broken link parameter, a closed entry parameter, one or more coded picture size parameters, one or more range mapping parameters, a hypothetical reference decoder buffer parameter, and/or other parameter(s).

    摘要翻译: 解码器接收包括与入口点标题相对应的入口点段的多个控制参数的入口点标题。 入口点头在包含多个层的比特流的入口点层中。 解码器解码入口点标题。 多个控制参数可以包括控制参数的各种组合,例如平移扫描开启/关闭参数,参考帧距离开/关参数,循环滤波开/关参数,快速色度运动补偿开/关参数,扩展 范围运动矢量开/关参数,可变大小的变换开/关参数,重叠变换开/关参数,量化决定参数和扩展差分运动矢量编码开/关参数,断链接参数,关闭条目 参数,一个或多个编码图像大小参数,一个或多个范围映射参数,假设参考解码器缓冲器参数和/或其他参数。

    Adaptive deadzone size adjustment in quantization
    57.
    发明申请
    Adaptive deadzone size adjustment in quantization 有权
    量化中的适应性死区大小调整

    公开(公告)号:US20080240235A1

    公开(公告)日:2008-10-02

    申请号:US11728895

    申请日:2007-03-26

    IPC分类号: H04N7/24

    摘要: Techniques and tools are described for adaptive deadzone (“DZ”) resizing during quantization. For example, in some embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size of a selected quantizer depending on the texture of the block. In other embodiments, a video encoder adjusts DZ size depending on the frequency of a coefficient being quantized. In still other embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size depending on the texture of the block and the frequency of the coefficient being quantized.

    摘要翻译: 描述了在量化期间适应性死区(“DZ”)调整大小的技术和工具。 例如,在一些实施例中,对于块的AC频率系数的量化,视频编码器根据块的纹理来调整所选量化器的DZ大小。 在其他实施例中,视频编码器根据被量化的系数的频率来调整DZ大小。 在其他实施例中,对于块的AC频率系数的量化,视频编码器根据块的纹理和被量化的系数的频率来调整DZ大小。

    Regions of interest for quality adjustments
    58.
    发明授权
    Regions of interest for quality adjustments 有权
    感兴趣的地区进行质量调整

    公开(公告)号:US08576908B2

    公开(公告)日:2013-11-05

    申请号:US13539730

    申请日:2012-07-02

    IPC分类号: H04N11/02

    摘要: Quality settings established by an encoder are adjusted based on information associated with regions of interest (“ROIs”). For example, quantization step sizes can be reduced (to improve quality) or increased (to reduce bit rate). ROIs can be identified and quality settings can be adjusted based on input received from a user interface. An overlap setting can be determined for a portion of a picture that corresponds to an ROI overlap area. For example, an overlap setting is chosen from step sizes corresponding to a first overlapping ROI and a second overlapping ROI, or from relative reductions in step size corresponding to the first ROI and the second ROI. ROIs can be parameterized by information (e.g., using data structures) that indicates spatial dimensions of the ROIs and quality adjustment information (e.g., dead zone information, step size information, and quantization mode information).

    摘要翻译: 基于与感兴趣区域(“ROI”)相关联的信息来调整由编码器建立的质量设置。 例如,可以减小量化步长(提高质量)或增加(以减少比特率)。 可以识别ROI,并且可以基于从用户界面接收的输入来调整质量设置。 可以针对对应于ROI重叠区域的图像的一部分来确定重叠设置。 例如,从与第一重叠ROI和第二重叠ROI相对应的步长尺寸或从与第一ROI和第二ROI对应的步长的相对减小中选择重叠设置。 可以通过指示ROI的空间维度和质量调整信息(例如,死区信息,步长信息和量化模式信息)的信息(例如,使用数据结构)对ROI进行参数化。

    Switching distortion metrics during motion estimation
    59.
    发明授权
    Switching distortion metrics during motion estimation 有权
    运动估计过程中的切换失真度量

    公开(公告)号:US08155195B2

    公开(公告)日:2012-04-10

    申请号:US11400049

    申请日:2006-04-07

    CPC分类号: H04N19/567

    摘要: Techniques and tools for switching distortion metrics during motion estimation are described. For example, a video encoder determines a distortion metric selection criterion for motion estimation. The criterion can be based on initial results of the motion estimation. To evaluate the criterion, the encoder can compare the criterion to a threshold that depends on a current quantization parameter. The encoder selects between multiple available distortion metrics, which can include a sample-domain distortion metric (e.g., SAD) and a transform-domain distortion metric (e.g., SAHD). The encoder uses the selected distortion metric in the motion estimation. Selectively switching between SAD and SAHD provides rate-distortion performance superior to using only SAD or only SAHD. Moreover, due to the lower complexity of SAD, the computational complexity of motion estimation with SAD-SAHD switching is typically less than motion estimation that always uses SAHD.

    摘要翻译: 描述了在运动估计期间切换失真度量的技术和工具。 例如,视频编码器确定用于运动估计的失真度量选择标准。 该标准可以基于运动估计的初始结果。 为了评估标准,编码器可以将标准与​​取决于当前量化参数的阈值进行比较。 编码器在可以包括采样域失真度量(例如SAD)和变换域失真度量(例如,SAHD)的多个可用失真度量之间进行选择。 编码器在运动估计中使用所选择的失真度量。 选择性地切换SAD和SAHD之间的速率失真性能优于仅使用SAD或仅SAHD。 此外,由于SAD的较低的复杂度,SAD-SAHD切换的运动估计的计算复杂度通常小于始终使用SAHD的运动估计。

    Regions of interest for quality adjustments
    60.
    发明申请
    Regions of interest for quality adjustments 有权
    感兴趣的地区进行质量调整

    公开(公告)号:US20080240250A1

    公开(公告)日:2008-10-02

    申请号:US11731851

    申请日:2007-03-30

    IPC分类号: H04N11/04

    摘要: Quality settings established by an encoder are adjusted based on information associated with regions of interest (“ROIs”). For example, quantization step sizes can be reduced (to improve quality) or increased (to reduce bit rate). ROIs can be identified and quality settings can be adjusted based on input received from a user interface. An overlap setting can be determined for a portion of a picture that corresponds to an ROI overlap area. For example, an overlap setting is chosen from step sizes corresponding to a first overlapping ROI and a second overlapping ROI, or from relative reductions in step size corresponding to the first ROI and the second ROI. ROIs can be parameterized by information (e.g., using data structures) that indicates spatial dimensions of the ROIs and quality adjustment information (e.g., dead zone information, step size information, and quantization mode information).

    摘要翻译: 基于与感兴趣区域(“ROI”)相关联的信息来调整由编码器建立的质量设置。 例如,可以减小量化步长(提高质量)或增加(以减少比特率)。 可以识别ROI,并且可以基于从用户界面接收的输入来调整质量设置。 可以针对对应于ROI重叠区域的图像的一部分来确定重叠设置。 例如,从与第一重叠ROI和第二重叠ROI相对应的步长尺寸或从与第一ROI和第二ROI对应的步长的相对减小中选择重叠设置。 可以通过指示ROI的空间维度和质量调整信息(例如,死区信息,步长信息和量化模式信息)的信息(例如,使用数据结构)对ROI进行参数化。