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    Coding of scene cuts in video sequences using non-reference frames
    21.
    发明申请
    Coding of scene cuts in video sequences using non-reference frames 审中-公开
    使用非参考帧对视频序列中的场景进行编码

    公开(公告)号：US20050286629A1

    公开(公告)日：2005-12-29

    申请号：US10875265

    申请日：2004-06-25

    Applicant: Adriana Dumitras ,  Barin Haskell

    Inventor： Adriana Dumitras ,  Barin Haskell

    IPC: H04B1/66 ,  H04N5/14 ,  H04N7/12 ,  H04N7/26 ,  H04N7/46 ,  H04N7/50 ,  H04N9/64 ,  H04N11/02 ,  H04N11/04

    CPC classification number: H04N19/114 ,  H04N19/124 ,  H04N19/137 ,  H04N19/142 ,  H04N19/577 ,  H04N19/61

    Abstract: A coding scheme for groups of frames that include scene cuts causes frames before and after the scene cut to be coded as non-reference frames with increased quantization parameters to reduce bandwidth. Although greater coding distortion can be expected for such frames, the distortion should be less or even not perceptible to a viewer owing to the dynamically changing image content caused by the scene change. Quantization parameter increases may vary based on: a viewing rate expected at a decoder, proximity of a frame to the scene cut, and observable motion speed both before and after the scene cut. Additionally, non-reference frames in the GOF may be coded using spatial direct mode coding.

    Abstract translation: 包括场景切换的帧组的编码方案使得在场景剪切之前和之后的帧被编码为具有增加的量化参数的非参考帧以减少带宽。 尽管对于这样的帧可以预期更大的编码失真，但是由于由场景变化引起的动态变化的图像内容，因此观看者的失真应该更少或甚至不能察觉。 量化参数增加可以基于：解码器预期的观看速率，帧到场景切换的接近度以及在场景切割之前和之后的可观察的运动速度可以变化。 另外，可以使用空间直接模式编码对GOF中的非参考帧进行编码。

    H.264/AVC coder incorporating rate and quality controller
    22.
    发明授权
    H.264/AVC coder incorporating rate and quality controller 有权
    H.264 / AVC编码器并入速率和质量控制器

    公开(公告)号：US07986731B2

    公开(公告)日：2011-07-26

    申请号：US10811983

    申请日：2004-03-30

    Applicant: Barin Haskell ,  Adriana Dumitras ,  James Normile ,  Hsi-Jung Wu ,  Xiaochun Nie ,  Atul Puri

    Inventor： Barin Haskell ,  Adriana Dumitras ,  James Normile ,  Hsi-Jung Wu ,  Xiaochun Nie ,  Atul Puri

    IPC: H04N7/12

    CPC classification number: H04N19/198 ,  H04N19/115 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/152 ,  H04N19/172 ,  H04N19/196 ,  H04N19/61 ,  H04N19/82

    Abstract: A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters.

    Abstract translation: 公开了一种用于视频编码应用的速率控制系统。 速率控制器响应于表示图像的空间复杂度，运动复杂度和/或每像素的复杂度指示符，为图像中的视频数据分配量化参数。 基于虚拟缓冲区丰满度分析和目标速率估计提出了一种基于虚拟缓冲器的量化器参数，该参数是从复杂性指标中得出的。 从用于对先前编码的类似类型的图像（例如，I图像，P图像或B图像）进行编码的量化器参数的线性回归分析提出了第二量化参数。 编码策略决定单元根据两个提出的量化器参数的比较来定义最终的量化器参数。

    METHOD AND APPARATUS FOR VARIABLE ACCURACY INTER-PICTURE TIMING SPECIFICATION FOR DIGITAL VIDEO ENCODING
    24.
    发明申请
    METHOD AND APPARATUS FOR VARIABLE ACCURACY INTER-PICTURE TIMING SPECIFICATION FOR DIGITAL VIDEO ENCODING 有权
    用于数字视频编码的可变精度互联时序规范的方法和装置

    公开(公告)号：US20070189378A1

    公开(公告)日：2007-08-16

    申请号：US11621969

    申请日：2007-01-10

    Applicant: Barin Haskell ,  David Singer ,  Adriana Dumitras ,  Atul Puri

    Inventor： Barin Haskell ,  David Singer ,  Adriana Dumitras ,  Atul Puri

    IPC: H04B1/66

    CPC classification number: H04N19/513 ,  G06T9/005 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/40 ,  H04N19/43 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/587 ,  H04N19/61 ,  H04N19/91 ,  H04N21/4305

    Abstract: A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.

    Abstract translation: 公开了一种用于数字视频编码的可变精度画面间时序规范的方法和装置。 具体地说，本发明公开了一种允许以非常有效的方式编码附近视频图像的相对定时的系统。 在一个实施例中，确定当前视频图像和附近视频图像之间的显示时间差。 然后将显示时间差编码为视频图像的数字表示。 在优选实施例中，附近的视频图像是最近发送的存储图像。 对于编码效率，可以使用可变长度编码系统或算术编码对显示时间差进行编码。 在替代实施例中，显示时间差被编码为2的幂，以减少发送的比特数。

    Multi-pass video encoding
    27.
    发明申请
    Multi-pass video encoding 有权
    多路视频编码

    公开(公告)号：US20060013298A1

    公开(公告)日：2006-01-19

    申请号：US11118616

    申请日：2005-04-28

    Applicant: Xin Tong ,  Hsi Jung Wu ,  Thomas Pun ,  Adriana Dumitras ,  Barin Haskell ,  Jim Normile

    Inventor： Xin Tong ,  Hsi Jung Wu ,  Thomas Pun ,  Adriana Dumitras ,  Barin Haskell ,  Jim Normile

    IPC: H04N11/04 ,  H04N11/02 ,  H04B1/66 ,  H04N7/12

    CPC classification number: H04N19/00193 ,  H04N19/00 ,  H04N19/152 ,  H04N19/194

    Abstract: Some embodiments of the invention provide a multi-pass encoding method that encodes several images (eg., several frames of a video sequence). The method iteratively performs an encoding operation that encodes these images. The encoding operation is based on a nominal quantization parameter, which the method uses to compute quantization parameters for the images. During several different iterations of the encoding operation, the method uses several different nominal quantization parameters. The method stops its iterations when it reaches a terminating criterion (e.g., it identifies an acceptable encoding of the images).

    Abstract translation: 本发明的一些实施例提供了对多个图像（例如，视频序列的几个帧）进行编码的多遍编码方法。 该方法迭代地执行编码这些图像的编码操作。 编码操作基于标称量化参数，该方法用于计算图像的量化参数。 在编码操作的几个不同迭代期间，该方法使用几个不同的标称量化参数。 该方法在达到终止标准（例如，它识别图像的可接受编码）时停止迭代。

    Determining the number of unidirectional and bidirectional motion compensated frames to be encoded for a video sequence and detecting scene cuts in the video sequence
    28.
    发明申请
    Determining the number of unidirectional and bidirectional motion compensated frames to be encoded for a video sequence and detecting scene cuts in the video sequence 有权
    确定要为视频序列编码的单向和双向运动补偿帧的数量，并检测视频序列中的场景切换

    公开(公告)号：US20050053135A1

    公开(公告)日：2005-03-10

    申请号：US10658938

    申请日：2003-09-09

    Applicant: Barin Haskell ,  Adriana Dumitras ,  Atul Puri

    Inventor： Barin Haskell ,  Adriana Dumitras ,  Atul Puri

    IPC: H04N7/26 ,  H04N7/12

    CPC classification number: H04N19/87 ,  H04N19/114 ,  H04N19/142 ,  H04N19/147 ,  H04N19/177

    Abstract: Methods for processing a set of successive video frames in two passes to determine the number of bidirectional (B) and unidirectional (P) motion compensated frames to be encoded in a video coding system. During the first pass, motion vectors and motion costs are computed for each frame and a derived cost value is computed based on the motion cost of at least one frame. The derived cost value is used to determine the number (NB) of B-frames to be encoded in the set of successive frames. In the second pass, the set of successive frames are encoded where NB frames are encoded as B-frames and some or all motion vectors computed in the first pass are re-used in the second pass. A scene cut detection method is also provided where an impulse-like increase in a ratio of motion costs is monitored.

    Abstract translation: 用于在两遍中处理一组连续视频帧的方法，以确定要在视频编码系统中编码的双向（B）和单向（P）运动补偿帧的数量。 在第一次通过期间，针对每个帧计算运动矢量和运动成本，并且基于至少一帧的运动成本来计算导出成本值。 导出成本值用于确定要在该组连续帧中编码的B帧的数量（NB）。 在第二遍中，连续帧的集合被编码，其中NB帧被编码为B帧，并且在第二遍中重新使用在第一遍中计算的一些或全部运动矢量。 还提供了一种场景切断检测方法，其中监测运动成本比例的脉冲状增加。

    Rate and quality controller for H.264/AVC video coder and scene analyzer therefor
    29.
    发明授权
    Rate and quality controller for H.264/AVC video coder and scene analyzer therefor 有权
    H.264 / AVC视频编码器和场景分析仪的速率和质量控制器

    公开(公告)号：US07869503B2

    公开(公告)日：2011-01-11

    申请号：US10811982

    申请日：2004-03-30

    Applicant: Barin Haskell ,  Adriana Dumitras ,  James Normile ,  Hsi-Jung Wu ,  Xiaochun Nie ,  Atul Puri

    Inventor： Barin Haskell ,  Adriana Dumitras ,  James Normile ,  Hsi-Jung Wu ,  Xiaochun Nie ,  Atul Puri

    IPC: H04N7/12

    CPC classification number: H04N19/198 ,  H04N19/115 ,  H04N19/124 ,  H04N19/132 ,  H04N19/137 ,  H04N19/14 ,  H04N19/149 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172 ,  H04N19/18 ,  H04N19/194 ,  H04N19/196 ,  H04N19/51 ,  H04N19/59 ,  H04N19/61

    Abstract: A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters.

    Abstract translation: 公开了一种用于视频编码应用的速率控制系统。 速率控制器响应于表示图像的空间复杂度，运动复杂度和/或每像素的复杂度指示符，为图像中的视频数据分配量化参数。 基于虚拟缓冲区丰满度分析和目标速率估计提出了一种基于虚拟缓冲器的量化器参数，该参数是从复杂性指标中得出的。 从用于对先前编码的类似类型的图像（例如，I图像，P图像或B图像）进行编码的量化器参数的线性回归分析提出了第二量化参数。 编码策略决定单元根据两个提出的量化器参数的比较来定义最终的量化器参数。

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