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    SIGNALING AND USE OF CHROMA SAMPLE POSITIONING INFORMATION
    42.
    发明申请
    SIGNALING AND USE OF CHROMA SAMPLE POSITIONING INFORMATION 有权
    信号定位信息的信号和使用

    公开(公告)号：US20080198936A1

    公开(公告)日：2008-08-21

    申请号：US11772070

    申请日：2007-06-29

    Applicant: Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan ,  Gary J. Sullivan

    Inventor： Sridhar Srinivasan ,  Chengjie Tu ,  Shankar Regunathan ,  Gary J. Sullivan

    IPC: H04N7/12

    CPC classification number: H04N19/186 ,  H04N19/46 ,  H04N19/63 ,  H04N19/70

    Abstract: Rules for the signaling and interpretation of chroma position are described. One rule, called the short rule, defines fifteen discrete chroma centering positions and corresponding four-bit syntax element. Another rule, called the extended rule, defines 81 discrete chroma centering positions and corresponding seven-bit syntax elements. A described method includes receiving digital media data at a digital media encoder, determining chroma position information for the received digital media data, and representing the chroma position information with one or more syntax elements in an encoded bitstream. The one or more syntax elements are operable to communicate the chroma position information to a digital media decoder. The chroma position information facilitates an image rotation or flip.

    Abstract translation: 描述色度位置信号和解释规则。 称为短规则的一个规则定义了十五个离散色度对中位置和相应的四位语法元素。 称为扩展规则的另一个规则定义了81个离散色度对中位置和相应的七位语法元素。 所描述的方法包括在数字媒体编码器处接收数字媒体数据，确定接收到的数字媒体数据的色度位置信息，并用编码比特流中的一个或多个语法元素表示色度位置信息。 一个或多个语法元素可操作以将色度位置信息传送到数字媒体解码器。 色度位置信息有助于图像旋转或翻转。

    Field start code for entry point frames with predicted first field
    45.
    发明申请
    Field start code for entry point frames with predicted first field 有权
    具有预测第一个字段的入口点帧的现场起始码

    公开(公告)号：US20050099869A1

    公开(公告)日：2005-05-12

    申请号：US10989596

    申请日：2004-11-15

    Applicant: Regis Crinon ,  Thomas Holcomb ,  Shankar Regunathan ,  Sridhar Srinivasan

    Inventor： Regis Crinon ,  Thomas Holcomb ,  Shankar Regunathan ,  Sridhar Srinivasan

    IPC: G11C7/00 ,  H04N5/783 ,  H04N7/12

    CPC classification number: H04N19/44 ,  H04N19/70

    Abstract: A decoder receives a field start code for an entry point key frame. The field start code indicates a second coded interlaced video field in the entry point key frame following a first coded interlaced video field in the entry point key frame and indicates a point to begin decoding of the second coded interlaced video field. The first coded interlaced video field is a predicted field, and the second coded interlaced video field is an intra-coded field. The decoder decodes the second field without decoding the first field. The field start code can be followed by a field header. The decoder can receive a frame header for the entry point key frame. The frame header may comprise a syntax element indicating a frame coding mode for the entry point key frame and/or a syntax element indicating field types for the first and second coded interlaced video fields.

    Abstract translation: 解码器接收入口点关键帧的场起始码。 场起始码指示入口点关键帧中的第一编码隔行扫描视频字段之后的入口点关键帧中的第二编码隔行扫描视频字段，并且指示开始对第二编码交错视频字段进行解码的点。 第一编码隔行视频字段是预测字段，第二编码隔行视频字段是帧内编码字段。 解码器解码第二场而不解码第一场。 字段起始码可以后跟一个字段标题。 解码器可以接收入口点关键帧的帧头。 帧头可以包括指示用于入口点关键帧的帧编码模式的语法元素和/或指示第一和第二编码隔行视频字段的字段类型的语法元素。

    Flexible range reduction
    46.
    发明申请
    Flexible range reduction 有权
    弹性范围缩小

    公开(公告)号：US20050063471A1

    公开(公告)日：2005-03-24

    申请号：US10989702

    申请日：2004-11-15

    Applicant: Shankar Regunathan ,  Sridhar Srinivasan ,  Jie Liang ,  Chih-Lung Lin ,  Minghui Xia

    Inventor： Shankar Regunathan ,  Sridhar Srinivasan ,  Jie Liang ,  Chih-Lung Lin ,  Minghui Xia

    IPC: H04N7/32 ,  H03M7/36 ,  H04N20060101 ,  H04N7/01 ,  H04N7/12 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50

    CPC classification number: H04N19/00145 ,  H04N19/137 ,  H04N19/16 ,  H04N19/196 ,  H04N19/46 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70

    Abstract: Techniques and tools are described for flexible range reduction of samples of video. For example, an encoder signals a first set of one or more syntax elements for range reduction of luma samples and signals a second set of one or more syntax elements for range reduction of chroma samples. The encoder selectively scales down the luma samples and chroma samples in a manner consistent with the first syntax element(s) and second syntax element(s), respectively. Or, an encoder signals range reduction syntax element(s) in an entry point header for an entry point segment, where the syntax element(s) apply to pictures in the entry point segment. If range reduction is used for the pictures, the encoder scales down samples of the pictures. Otherwise, the encoder skips the scaling down. A decoder performs corresponding parsing and scaling up operations.

    Abstract translation: 描述了技术和工具，用于灵活地缩减视频样本。 例如，编码器用信号通知一个或多个语法元素的第一组，用于亮度样本的范围减小，并且为第二组一个或多个语法元素用于色度样本的范围缩小。 编码器分别以与第一语法元素和第二语法元素一致的方式选择性地缩小亮度样本和色度样本。 或者，编码器对入口点段的入口点标题中的范围缩小语法元素进行信号，其中语法元素适用于入口点段中的图像。 如果图像使用范围缩小，则编码器缩小图像的样本。 否则，编码器跳过缩小比例。 解码器执行相应的解析和放大操作。

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