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    Method and apparatus for selecting a coding mode
    1.
    发明授权
    Method and apparatus for selecting a coding mode 有权
    用于选择编码模式的方法和装置

    公开(公告)号：US08582652B2

    公开(公告)日：2013-11-12

    申请号：US11928440

    申请日：2007-10-30

    申请人： Limin Wang ,  Yue Yu ,  Robert O. Eifrig ,  Jian Zhou ,  David M. Baylon ,  Krit Panusopone ,  Xue Fang ,  Ajay K. Luthra

    发明人： Limin Wang ,  Yue Yu ,  Robert O. Eifrig ,  Jian Zhou ,  David M. Baylon ,  Krit Panusopone ,  Xue Fang ,  Ajay K. Luthra

    IPC分类号： H04N11/02

    CPC分类号： H04N19/13 ,  H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/61

    摘要： A method and apparatus for selecting a coding mode for a block of a current picture are disclosed. For example, the method selects a coding mode in accordance with a cost function, for coding the block, wherein the cost function comprises a coding distortion parameter and a number of coding bits parameter, wherein said coding distortion parameter is measured in accordance with at least one of: between a prediction residual and a reconstructed prediction residual, or between a transformed prediction residual and a dequantized transformed prediction residual, wherein the number of coding bits parameter is computed in accordance with at least one of: from a true number of compressed bits resulting from coding said block, directly from a plurality of bins, or directly from a plurality of quantized transform coefficients.

    摘要翻译： 公开了一种用于选择当前画面的块的编码模式的方法和装置。 例如，该方法根据成本函数选择用于编码块的编码模式，其中成本函数包括编码失真参数和编码比特数量，其中所述编码失真参数至少根据 在预测残差和重构预测残差之间，或在变换预测残差与去量化变换预测残差之间的其中之一，其中根据以下至少一个来计算编码位参数的数目：从真实数量的压缩位 这是由直接从多个箱中或直接从多个量化变换系数对所述块进行编码而产生的。

    Method and Apparatus for Selecting a Coding Mode
    2.
    发明申请
    Method and Apparatus for Selecting a Coding Mode 有权
    用于选择编码模式的方法和装置

    公开(公告)号：US20090110066A1

    公开(公告)日：2009-04-30

    申请号：US11928440

    申请日：2007-10-30

    申请人： Limin Wang ,  Yue Yu ,  Robert O. Eifrig ,  Jian Zhou ,  David M. Baylon ,  Krit Panusopone ,  Xue Fang ,  Ajay K. Luthra

    发明人： Limin Wang ,  Yue Yu ,  Robert O. Eifrig ,  Jian Zhou ,  David M. Baylon ,  Krit Panusopone ,  Xue Fang ,  Ajay K. Luthra

    IPC分类号： H04N7/32

    CPC分类号： H04N19/13 ,  H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/61

    摘要： A method and apparatus for selecting a coding mode for a block of a current picture are disclosed. For example, the method selects a coding mode in accordance with a cost function, for coding the block, wherein the cost function comprises a coding distortion parameter and a number of coding bits parameter, wherein said coding distortion parameter is measured in accordance with at least one of: between a prediction residual and a reconstructed prediction residual, or between a transformed prediction residual and a dequantized transformed prediction residual, wherein the number of coding bits parameter is computed in accordance with at least one of: from a true number of compressed bits resulting from coding said block, directly from a plurality of bins, or directly from a plurality of quantized transform coefficients.

    摘要翻译： 公开了一种用于选择当前画面的块的编码模式的方法和装置。 例如，该方法根据成本函数选择用于编码块的编码模式，其中成本函数包括编码失真参数和编码比特数量，其中所述编码失真参数至少根据 在预测残差和重构预测残差之间，或在变换预测残差与去量化变换预测残差之间的其中之一，其中根据以下的至少一个来计算编码位参数的数目：从真实数量的压缩位 这是由直接从多个箱中或直接从多个量化变换系数对所述块进行编码而产生的。

    Rate control for an MPEG transcoder without a priori knowledge picture type
    5.
    发明授权
    Rate control for an MPEG transcoder without a priori knowledge picture type 有权

    公开(公告)号：US07020198B2

    公开(公告)日：2006-03-28

    申请号：US10131414

    申请日：2002-04-22

    申请人： Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    发明人： Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    IPC分类号： H04N7/12 ,  H04N11/04 ,  H04N11/02

    CPC分类号： H04N21/23655 ,  H04N19/114 ,  H04N19/152 ,  H04N19/157 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/40 ,  H04N19/577 ,  H04N19/61

    摘要： A rate control system suitable for use with a digital video transcoder, such as one conforming to the MPEG standard. The proposed rate control system starts coding with any reasonable set of assumed Group of Pictures (GOP) parameters, thereby avoiding a processing delay of about one GOP which would otherwise be incurred to extract the complete GOP structure information from a pre-compressed bit stream. In addition, the system avoids the need to store the data corresponding to the GOP, thereby reducing the memory required for transcoding. Encoding of a first picture in a sequence or GOP begins without a priori knowledge of the picture type of subsequent pictures. A reasonable set of GOP parameters is assumed to determine an encoding bit budget. The bit budget is gradually corrected as successive pictures are coded according to their picture types. Changes in the GOP structure of pre-compressed bitstreams can be addressed, for example, when switching channels, inserting commercials, and the like. Target rates with incorrect starting GOP parameters will converge within a few GOPs.

    Rate control for an MPEG transcoder without a priori knowledge of picture type
    6.
    发明授权
    Rate control for an MPEG transcoder without a priori knowledge of picture type 有权
    没有图像类型的先验知识的MPEG代码转换器的速率控制

    公开(公告)号：US06570922B1

    公开(公告)日：2003-05-27

    申请号：US09198867

    申请日：1998-11-24

    申请人： Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    发明人： Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    IPC分类号： H04N712

    CPC分类号： H04N21/23655 ,  H04N19/114 ,  H04N19/152 ,  H04N19/157 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/40 ,  H04N19/577 ,  H04N19/61

    摘要： A rate control system suitable for use with a digital video transcoder, such as one conforming to the MPEG standard. The proposed rate control system starts coding with any reasonable set of assumed Group of Pictures (GOP) parameters, thereby avoiding a processing delay of about one GOP which would otherwise be incurred to extract the complete GOP structure information from a pre-compressed bit stream. In addition, the system avoids the need to store the data corresponding to the GOP, thereby reducing the memory required for transcoding. Encoding of a first picture in a sequence or GOP begins without a priori knowledge of the picture type of subsequent pictures. A reasonable set of GOP parameters is assumed to determine an encoding bit budget. The bit budget is gradually corrected as successive pictures are coded according to their picture types. Changes in the GOP structure of pre-compressed bitstreams can be addressed, for example, when switching channels, inserting commercials, and the like. Target rates with incorrect starting GOP parameters will converge within a few GOPs.

    摘要翻译： 一种适用于数字视频转码器的速率控制系统，例如符合MPEG标准的数字视频转码器。 所提出的速率控制系统以任何合理的假想图像组（GOP）参数开始编码，从而避免了大约一个GOP的处理延迟，否则将从预压缩位流中提取完整的GOP结构信息。 此外，系统避免了存储对应于GOP的数据的需要，从而减少了转码所需的存储器。 序列或GOP中的第一图像的编码开始于对随后图像的图像类型的先验知识。 假设合理的GOP参数集合来确定编码比特预算。 随着连续的图像根据图像的类型被编码，位预算逐渐被校正。 可以解决预压缩比特流的GOP结构的变化，例如，当切换频道，插入商业广告等时。 具有不正确起始GOP参数的目标速率将在几个GOP内收敛。

    Method of architecture for converting MPEG-2 4:2:2-profile bitstreams into main-profile bitstreams
    7.
    发明授权
    Method of architecture for converting MPEG-2 4:2:2-profile bitstreams into main-profile bitstreams 有权
    将MPEG-2 4：2：2配置比特流转换为主配置文件位流的架构方法

    公开(公告)号：US06259741B1

    公开(公告)日：2001-07-10

    申请号：US09252135

    申请日：1999-02-18

    申请人： Xuemin Chen ,  Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    发明人： Xuemin Chen ,  Limin Wang ,  Ajay Luthra ,  Robert O. Eifrig

    IPC分类号： H04N712

    CPC分类号： H04N19/186 ,  H04N19/40

    摘要： A system for converting the color format of a digital video bitstream. The system accounts for the allowable formats of the pre- and-post-conversion bitstreams, including quantizer precision level, and whether luma and chroma data have separate quantization matrices, or share a common quantization matrix. In a particular implementation, an MPEG-2 4:2:2 P bitstream having a color format of 4:2:2 or 4:2:0 is converted to a MP bitstream having a color format of 4:2:0. Coding efficiencies are achieved by using the luma quantization matrix to re-quantize the chroma data, and re-using luma motion vectors for performing motion compensation of the chroma data. Further efficiencies can be achieved by representing a 4:2:2 reference picture in a 4:2:0 format for converting inter coded frames, and changing the position of a pixel downsizing filter and clip function. Adjustment of the quantization precision is provided as required. A transcoding function can also be achieved.

    摘要翻译： 一种用于转换数字视频比特流的颜色格式的系统。 系统考虑了前后转换比特流的允许格式，包括量化器精度级别，以及亮度和色度数据是否具有单独的量化矩阵，或共享公共量化矩阵。 在具体实现中，将具有4:2:2或4:2:0的颜色格式的MPEG-2 4：2：2比特流转换为具有4:2:0的颜色格式的MP比特流。 通过使用亮度量化矩阵来重新量化色度数据并且重新使用亮度运动矢量来执行色度数据的运动补偿来实现编码效率。 通过以4：2：0格式表示4：2：2参考图像来转换帧间编码帧，并改变像素缩小滤波器和剪辑功能的位置，可以实现更高的效率。 根据需要提供量化精度的调整。 还可以实现转码功能。

    Method and apparatus for determining timing information from a bit stream
    8.
    发明授权
    Method and apparatus for determining timing information from a bit stream 有权
    用于从比特流确定定时信息的方法和装置

    公开(公告)号：US08503541B2

    公开(公告)日：2013-08-06

    申请号：US11037446

    申请日：2005-01-18

    申请人： Mandayam A. Narasimhan ,  Robert O. Eifrig

    发明人： Mandayam A. Narasimhan ,  Robert O. Eifrig

    IPC分类号： H04N7/12

    CPC分类号： H04N21/2368 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/4341 ,  H04N21/8451

    摘要： A method and apparatus for determining timing information from an MPEG-2 stream carrying Advanced Video Coding (AVC) content is disclosed. The method includes receiving an initial access unit from the MPEG-2 stream, and determining whether the MPEG-2 stream contains a temporal picture order count (POC) parameter. If the temporal POC parameter is contained in the MPEG-2 stream, the temporal POC parameter is used to compute a presentation time stamp (pts) for a next presentation unit (m).

    摘要翻译： 公开了一种从携带高级视频编码（AVC）内容的MPEG-2流确定定时信息的方法和装置。 该方法包括从MPEG-2流接收初始接入单元，并确定MPEG-2流是否包含时间图像顺序计数（POC）参数。 如果时间POC参数包含在MPEG-2流中，则使用时间POC参数来计算下一个呈现单元（m）的呈现时间戳（pts）。

    Method and Apparatus for Real-Time Video Encoding
    9.
    发明申请
    Method and Apparatus for Real-Time Video Encoding 审中-公开
    用于实时视频编码的方法和装置

    公开(公告)号：US20080137726A1

    公开(公告)日：2008-06-12

    申请号：US11609572

    申请日：2006-12-12

    申请人： Chanchal Chatterjee ,  Robert O. Eifrig ,  Robert S. Nemiroff

    发明人： Chanchal Chatterjee ,  Robert O. Eifrig ,  Robert S. Nemiroff

    IPC分类号： H04N11/04

    CPC分类号： H04N19/436 ,  H04N19/61

    摘要： A real-time encoder, e.g., a real-time H.264 compliant encoder or a real-time AVC compliant encoder is disclosed. For example, the encoder comprises a first digital signal processor (DSP) for processing a first panel of an input image and a second digital signal processor (DSP) for processing a second panel of the input image. Finally, the encoder comprises a field programmable gate array (FPGA) for supporting both the first DSP and the second DSP.

    摘要翻译： 公开了实时编码器，例如实时H.264兼容编码器或符合实时AVC的编码器。 例如，编码器包括用于处理输入图像的第一面板的第一数字信号处理器（DSP）和用于处理输入图像的第二面板的第二数字信号处理器（DSP）。 最后，编码器包括用于支持第一DSP和第二DSP的现场可编程门阵列（FPGA）。

    Method, protocol, and apparatus for transporting advanced video coding content
    10.
    发明授权
    Method, protocol, and apparatus for transporting advanced video coding content 有权
    用于传送高级视频编码内容的方法，协议和装置

    公开(公告)号：US08351514B2

    公开(公告)日：2013-01-08

    申请号：US11037439

    申请日：2005-01-18

    申请人： Mandayam A. Narasimhan ,  Robert O. Eifrig

    发明人： Mandayam A. Narasimhan ,  Robert O. Eifrig

    IPC分类号： H04N7/12

    CPC分类号： H04N21/2368 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/4341 ,  H04N21/8451

    摘要： A method, protocol and apparatus for transporting Advanced Video Coding (AVC) content, e.g., using MPEG-2 systems is disclosed. Specifically, the present method is related to the carriage of various flavors of AVC streams in a uniform fashion over MPEG-2 systems (e.g., both transport and program streams). The method includes generating the AVC content from an input stream, and thereafter transporting the AVC content in a transport stream or a program stream over MPEG-2. The AVC content is generated in accordance with at least one constraint that is associated with the transport stream or the program stream.

    摘要翻译： 公开了一种用于传送高级视频编码（AVC）内容的方法，协议和装置，例如使用MPEG-2系统。 具体地说，本方法涉及通过MPEG-2系统（例如，传输和程序流两者）以统一方式运送各种口味的AVC流。 该方法包括从输入流生成AVC内容，然后通过MPEG-2传输传输流或节目流中的AVC内容。 AVC内容根据与传输流或节目流相关联的至少一个约束来生成。