H.264/AVC coder incorporating rate and quality controller
    5.
    发明申请
    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:US20050175092A1

    公开(公告)日:2005-08-11

    申请号:US10811983

    申请日:2004-03-30

    IPC分类号: H04N7/12 H04N7/26 H04N7/50

    摘要: 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.

    摘要翻译: 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 IMPROVED CODING MODE SELECTION
    8.
    发明申请
    METHOD AND APPARATUS FOR IMPROVED CODING MODE SELECTION 有权
    改进编码模式选择的方法和装置

    公开(公告)号:US20070127579A1

    公开(公告)日:2007-06-07

    申请号:US11671463

    申请日:2007-02-05

    IPC分类号: H04B1/66

    摘要: Some embodiments provide a method for selecting an encoding mode from several encoding modes. For each encoding mode from several encoding modes, the method computes a Lagrangian value based on a distortion value that is identified by using a function that reduces the impact of outliers. The method selects a particular encoding mode based on the computed Lagrangian values. In some embodiments, the function is a Huber function. In some embodiments, the computed Lagrangian value is further based on a bit rate value and a Lagrangian multiplier.

    摘要翻译: 一些实施例提供了一种从几种编码模式中选择编码模式的方法。 对于来自若干编码模式的每个编码模式,该方法基于通过使用减少异常值的影响的函数来识别的失真值来计算拉格朗日值。 该方法基于所计算的拉格朗日值来选择特定编码模式。 在一些实施例中,该函数是Huber函数。 在一些实施例中,计算的拉格朗日值进一步基于比特率值和拉格朗日乘数。

    H.264/AVC coder incorporating rate and quality controller
    9.
    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

    IPC分类号: H04N7/12

    摘要: 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.

    摘要翻译: 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
    10.
    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

    IPC分类号: H04B1/66

    摘要: 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.

    摘要翻译: 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。