Intelligent differential quantization of video coding
    6.
    发明授权
    Intelligent differential quantization of video coding 有权
    智能差分量化的视频编码

    公开(公告)号:US07602851B2

    公开(公告)日:2009-10-13

    申请号:US10623195

    申请日:2003-07-18

    IPC分类号: H04N7/12

    摘要: With intelligent differential quantization, a video codec intelligently quantizes video at differing strength levels within a frame, such as on a macroblock (MB) or a group of MB basis. This allows the codec to control bit usage on a finer granularity than a frame to meet hardware constraints, as well as providing perceptual optimization by coarsely quantizing unimportant regions, while finely quantizing important regions within a frame. The intelligent differential quantization uses motion information gathered from encoding and analysis of the video to classify the importance of different regions of the image, and quantizes the regions accordingly. In addition, the intelligent differential quantization include efficient signaling of information as to the differential quantization strengths in the compressed bit stream.

    摘要翻译: 通过智能差分量化,视频编解码器在帧内以不同的强度水平智能量化视频,例如在宏块(MB)或一组基于MB的基础上。 这允许编解码器以比帧更精细的粒度来控制比特使用以满足硬件约束,以及通过粗略量化不重要区域来提供感知优化,同时精细量化帧内的重要区域。 智能差分量化使用从视频的编码和分析中收集的运动信息来分类图像的不同区域的重要性,并且相应地量化该区域。 此外,智能差分量化包括关于压缩比特流中的差分量化强度的信息的有效信令。

    Signaling coding and display options in entry point headers
    9.
    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。

    Switching distortion metrics during motion estimation
    10.
    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。