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    Signaling and use of chroma sample positioning information
    11.
    发明授权
    Signaling and use of chroma sample positioning information 有权
    信号和使用色度样本定位信息

    公开(公告)号：US08054886B2

    公开(公告)日：2011-11-08

    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 ,  H04N11/02 ,  H04N11/20 ,  H04N7/01

    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。

    Signaling for entry point frames with predicted first field
    12.
    发明申请
    Signaling for entry point frames with predicted first field 有权
    对具有预测的第一场的入口点信号进行信令

    公开(公告)号：US20050152448A1

    公开(公告)日：2005-07-14

    申请号：US10989843

    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: H04N21/23424 ,  H04N19/44 ,  H04N19/70 ,  H04N21/44016 ,  H04N21/8455

    Abstract: A video decoder receives an entry point key frame comprising first and second interlaced video fields and decodes a first syntax element comprising information (e.g., frame coding mode) for the entry point key frame at a first syntax level (e.g., frame level) in a bitstream. The first interlaced video field is a predicted field, and the second interlaced video field is an intra-coded field. The information for the entry point key frame can be a frame coding mode (e.g., field interlace) for the entry point key frame. The decoder can decode a second syntax element at the first syntax level comprising second information (e.g., field type for each of the first and second interlaced video fields) for the entry point key frame.

    Abstract translation: 视频解码器接收包括第一和第二隔行视频字段的入口点关键帧，并且解码第一语法元素，该第一语法元素包括第一语法元素，其包括用于入口点关键帧的信息（例如，帧编码模式） 比特流。 第一隔行视频字段是预测字段，第二隔行视频字段是帧内编码字段。 入口点关键帧的信息可以是用于入口点关键帧的帧编码模式（例如，场交错）。 解码器可以解码第一语法级别的第二语法元素，其包括用于入口点关键帧的第二信息（例如，用于第一和第二隔行扫描视频字段中的每一个的场类型）。

    Reducing DC leakage in HD photo transform
    13.
    发明授权
    Reducing DC leakage in HD photo transform 有权
    降低高清摄影中的直流泄漏

    公开(公告)号：US08369638B2

    公开(公告)日：2013-02-05

    申请号：US12165474

    申请日：2008-06-30

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

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

    IPC: G06K9/36

    CPC classification number: H04N19/00909 ,  H04N19/122 ,  H04N19/60 ,  H04N19/86

    Abstract: In certain embodiments, to eliminate DC leakage into surrounding AC values, scaling stage within a photo overlap transform operator is modified such that the off-diagonal elements of the associated scaling matrix have the values of 0. In certain embodiments, the on-diagonal scaling matrix are given the values (0.5, 2). In some embodiments, the scaling is performed using a combination of reversible modulo arithmetic and lifting steps. In yet other embodiments, amount of DC leakage is estimated at the encoder, and preprocessing occurs to mitigate amount of leakage, with the bitstream signaling that preprocessing has occurred. A decoder may then read the signal and use the information to mitigate DC leakage.

    Abstract translation: 在某些实施例中，为了将DC泄漏消除到周围的AC值中，修改照片重叠变换算子内的缩放阶段，使得相关联的缩放矩阵的非对角元素具有值0.在某些实施例中， 矩阵给出值（0.5,2）。 在一些实施例中，使用可逆模运算和提升步骤的组合来执行缩放。 在其他实施例中，在编码器处估计DC泄漏量，并且发生预处理以减轻泄漏量，同时比特流指示已经发生预处理。 然后，解码器可以读取信号并使用该信息来减轻DC泄漏。

    Intensity estimation/compensation for interlaced forward-predicted fields
    14.
    发明授权
    Intensity estimation/compensation for interlaced forward-predicted fields 有权
    隔行前向预测场的强度估计/补偿

    公开(公告)号：US08009739B2

    公开(公告)日：2011-08-30

    申请号：US10933907

    申请日：2004-09-02

    Applicant: Thomas W. Holcomb ,  Sridhar Srinivasan ,  Shankar Regunathan

    Inventor： Thomas W. Holcomb ,  Sridhar Srinivasan ,  Shankar Regunathan

    IPC: H04N7/12 ,  H04N11/02

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

    Abstract: Techniques and tools for intensity compensation for interlaced forward-predicted fields are described. For example, a video decoder receives and decodes a variable length code that indicates which of two reference fields for an interlaced forward-predicted field use intensity compensation (e.g., both, only the first, or only the second). The decoder performs intensity compensation on each of the two reference fields that uses intensity compensation. A video encoder performs corresponding intensity estimation/compensation and signaling.

    Abstract translation: 描述了用于交错前向预测场的强度补偿的技术和工具。 例如，视频解码器接收并解码可变长度码，该可变长度码指示用于隔行的前向预测场使用强度补偿（例如，两者，仅第一个，或仅第二个）的两个参考场中的哪一个。 解码器对使用强度补偿的两个参考场中的每一个进行强度补偿。 视频编码器执行相应的强度估计/补偿和信令。

    REDUCING DC LEAKAGE IN HD PHOTO TRANSFORM
    16.
    发明申请
    REDUCING DC LEAKAGE IN HD PHOTO TRANSFORM 有权
    降低HD照相变换中的直流泄漏

    公开(公告)号：US20090297054A1

    公开(公告)日：2009-12-03

    申请号：US12165474

    申请日：2008-06-30

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

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

    IPC: G06K9/36

    CPC classification number: H04N19/00909 ,  H04N19/122 ,  H04N19/60 ,  H04N19/86

    Abstract: In certain embodiments, to eliminate DC leakage into surrounding AC values, scaling stage within a photo overlap transform operator is modified such that the off-diagonal elements of the associated scaling matrix have the values of 0. In certain embodiments, the on-diagonal scaling matrix are given the values (0.5, 2). In some embodiments, the scaling is performed using a combination of reversible modulo arithmetic and lifting steps. In yet other embodiments, amount of DC leakage is estimated at the encoder, and preprocessing occurs to mitigate amount of leakage, with the bitstream signaling that preprocessing has occurred. A decoder may then read the signal and use the information to mitigate DC leakage.

    Abstract translation: 在某些实施例中，为了将DC泄漏消除到周围的AC值中，修改照片重叠变换算子内的缩放阶段，使得相关联的缩放矩阵的非对角元素具有值0.在某些实施例中， 矩阵给出值（0.5,2）。 在一些实施例中，使用可逆模运算和提升步骤的组合来执行缩放。 在其他实施例中，在编码器处估计DC泄漏量，并且发生预处理以减轻泄漏量，同时比特流指示已经发生预处理。 然后，解码器可以读取信号并使用该信息来减轻DC泄漏。

    SIGNALING AND USE OF CHROMA SAMPLE POSITIONING INFORMATION
    18.
    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
    20.
    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。

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