Bit rate control mechanism for digital image and video data compression
    1.
    发明授权
    Bit rate control mechanism for digital image and video data compression 失效
    用于数字图像和视频数据压缩的比特率控制机制

    公开(公告)号:US5995151A

    公开(公告)日:1999-11-30

    申请号:US932681

    申请日:1997-09-18

    摘要: A bit rate control mechanism for a digital image or video compression system estimates a complexity parameter for a current picture, or block of samples, of a video signal as a function of parameters for a prior picture of the video signal, which parameters include a bit rate. From the complexity parameter a quality factor for the current picture is determined and applied to a quantizer to compress the current picture. A complexity pre-processor may also be used to detect scene changes in the video signal prior to estimating the complexity parameter. If there is a scene change detected, then the rate control mechanism is reset prior to estimating the complexity parameter for the first picture in the new scene. Also a video buffer verifier is controlled so that the buffer occupancy at the end of a specified image sequence is at a target value so that looping and editing applications are facilitated.

    摘要翻译: 用于数字图像或视频压缩系统的比特率控制机构估计作为视频信号的先前图像的参数的视频信号的当前图像或采样块的复杂度参数,哪些参数包括位 率。 根据复杂度参数确定当前图像的质量因子并将其应用于量化器以压缩当前图像。 在估计复杂度参数之前,还可以使用复杂度预处理器来检测视频信号中的场景变化。 如果检测到场景变化,则在估计新场景中的第一画面的复杂度参数之前,速率控制机构被重置。 还控制视频缓冲器验证器,使得指定图像序列末尾的缓冲器占用是目标值,从而便于循环和编辑应用。

    Bit rate control mechanism for digital image and video data compression
    2.
    发明授权
    Bit rate control mechanism for digital image and video data compression 失效
    用于数字图像和视频数据压缩的比特率控制机制

    公开(公告)号:US5686964A

    公开(公告)日:1997-11-11

    申请号:US566100

    申请日:1995-12-04

    摘要: A bit rate control mechanism for a digital image or video compression system estimates a complexity parameter for a current picture, or block of samples, of a video signal as a function of parameters for a prior picture of the video signal, which parameters include a bit rate. From the complexity parameter a quality factor for the current picture is determined and applied to a quantizer to compress the current picture. A complexity pre-processor may also be used to detect scene changes in the video signal prior to estimating the complexity parameter. If there is a scene change detected, then the rate control mechanism is reset prior to estimating the complexity parameter for the first picture in the new scene.

    摘要翻译: 用于数字图像或视频压缩系统的比特率控制机构估计作为视频信号的先前图像的参数的视频信号的当前图像或采样块的复杂度参数,哪些参数包括位 率。 根据复杂度参数确定当前图像的质量因子并将其应用于量化器以压缩当前图像。 在估计复杂度参数之前,还可以使用复杂度预处理器来检测视频信号中的场景变化。 如果检测到场景变化,则在估计新场景中的第一画面的复杂度参数之前,速率控制机构被重置。

    Method and apparatus for determining timing information from a bit stream
    3.
    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

    IPC分类号: H04N7/12

    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
    4.
    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

    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
    5.
    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

    IPC分类号: H04N7/12

    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。

    Method and Apparatus for Motion Estimation in a Video Encoder
    6.
    发明申请
    Method and Apparatus for Motion Estimation in a Video Encoder 审中-公开
    视频编码器中运动估计的方法和装置

    公开(公告)号:US20080025395A1

    公开(公告)日:2008-01-31

    申请号:US11460341

    申请日:2006-07-27

    IPC分类号: H04N7/12

    摘要: Method and apparatus for motion estimation in a video encoder is described. In one example, a motion estimator includes registers, first-in-first out (FIFO) logic, costing logic, and processing logic. The registers are configured to store an even field and an odd field of a current macroblock pair in a current frame in a video stream. The FIFO logic is configured to store a reference window of a reference frame in the video stream. The costing logic is configured to produce cost data. The processing logic is coupled to the registers, the FIFO logic, and the costing logic. The processing logic is configured to generate common sums of absolute differences (SADs) for the current macroblock pair, generate SADs for partitions of the current macroblock pair from combinations of the common SADs, and cost and minimize the SADs for the partitions.

    摘要翻译: 描述了视频编码器中运动估计的方法和装置。 在一个示例中,运动估计器包括寄存器,先进先出(FIFO)逻辑,成本核算逻辑和处理逻辑。 寄存器被配置为在视频流中的当前帧中存储当前宏块对的偶数场和奇数场。 FIFO逻辑被配置为将参考帧的参考窗口存储在视频流中。 成本核算逻辑被配置为产生成本数据。 处理逻辑耦合到寄存器,FIFO逻辑和成本核算逻辑。 处理逻辑被配置为产生当前宏块对的绝对差(SAD)的公差总和,从公共SAD的组合生成用于当前宏块对的分区的SAD和成本,并使分区的SAD最小化。

    Method and apparatus for selecting a coding mode
    9.
    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

    IPC分类号: H04N11/02

    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
    10.
    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

    IPC分类号: H04N7/32

    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。