Method and Apparatus for Variable Accuracy Inter-Picture Timing Specification for Digital Video Encoding
    63.
    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图像间时序规范的方法和装置

    公开(公告)号:US20100183073A1

    公开(公告)日:2010-07-22

    申请号:US12689157

    申请日:2010-01-18

    IPC分类号: H04N7/26

    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。

    Method and apparatus for variable accuracy inter-picture timing specification for digital video encoding
    64.
    发明授权
    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画面间时序规范的方法和装置

    公开(公告)号:US07668240B2

    公开(公告)日:2010-02-23

    申请号:US11621974

    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。

    Using order difference for calculating motion vector
    65.
    发明授权
    Using order difference for calculating motion vector 有权
    使用顺序差来计算运动矢量

    公开(公告)号:US07551674B2

    公开(公告)日:2009-06-23

    申请号:US11835739

    申请日:2007-08-08

    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。

    Method and apparatus for improved coding mode selection
    68.
    发明授权
    Method and apparatus for improved coding mode selection 有权
    用于改进编码模式选择的方法和装置

    公开(公告)号:US07194035B2

    公开(公告)日:2007-03-20

    申请号:US10614929

    申请日:2003-07-07

    IPC分类号: H04N7/12

    摘要: Some embodiments provide a method of performing mode selection in a video compression and encoding system. The method encodes with several encoding modes from a set of encoding modes. The method computes a distortion value for each encoding mode from the several encoding modes. The method computes a bit rate value for each encoding mode from the several encoding modes. The method computes a Lagrangian value for each encoding mode from the several encoding modes, using the distortion value, the bit rate value, and a Lagrangian multiplier. The method selects an encoding mode based on the Lagrangian values.In some embodiments, computing the distortion value includes using a function that reduces the effects of outliers. In some embodiments, the Lagrangian multiplier is a slow varying Lagrangian multiplier that varies at a slower rate than a varying reference Lagrangian multiplier for a reference encoding mode. In yet some embodiments, the method clusters the Lagrangian values.

    摘要翻译: 一些实施例提供了在视频压缩和编码系统中执行模式选择的方法。 该方法使用一组编码模式对几种编码模式进行编码。 该方法从几种编码模式计算每个编码模式的失真值。 该方法从几种编码模式计算每个编码模式的比特率值。 该方法使用失真值,比特率值和拉格朗日乘数从几种编码模式计算每个编码模式的拉格朗日值。 该方法基于拉格朗日值来选择编码模式。 在一些实施例中,计算失真值包括使用减少异常值的影响的函数。 在一些实施例中,拉格朗日乘数是慢变化的拉格朗日乘数,其以比用于参考编码模式的变化的参考拉格朗日乘数更慢的速率变化。 在一些实施例中,该方法聚集拉格朗日值。

    Method and apparatus for control of rate-distortion tradeoff by mode selection in video encoders
    70.
    发明授权
    Method and apparatus for control of rate-distortion tradeoff by mode selection in video encoders 有权
    用于通过视频编码器中的模式选择来控制速率失真折衷的方法和装置

    公开(公告)号:US07822118B2

    公开(公告)日:2010-10-26

    申请号:US11344591

    申请日:2006-01-30

    IPC分类号: H04B1/66

    摘要: A Method And Apparatus For Control of Rate-Distortion Tradeoff by Mode Selection in Video Encoders is Disclosed. The system of the present invention first selects a distortion value D near a desired distortion value. Next, the system determines a quantizer value Q using the selected distortion value D. The system then calculates a Lagrange multiplier lambda using the quantizer value Q. Using the selected Lagrange multiplier lambda and quantizer value Q, the system begins encoding pixelblocks. If the system detects a potential buffer overflow, then the system will increase the Lagrange multiplier lambda. If the Lagrange multiplier lambda exceeds a maximum lambda threshold then the system will increase the quantizer value Q. If the system detects a potential buffer underflow, then the system will decrease the Lagrange multiplier lambda. If the Lagrange multiplier lambda falls below a minimum lambda threshold then the system will decrease the quantizer value Q.

    摘要翻译: 公开了一种用于通过视频编码器中的模式选择来控制速率失真折衷的方法和装置。 本发明的系统首先在期望的失真值附近选择失真值D. 接下来,系统使用所选择的失真值D来确定量化器值Q.然后,系统使用量化器值Q计算拉格朗日乘数λ。使用所选的拉格朗日乘数λ和量化器值Q,系统开始对像素块进行编码。 如果系统检测到潜在的缓冲区溢出,则系统将增加拉格朗日乘数lambda。 如果拉格朗日乘数λ超过最大λ阈值,则系统将增加量化器值Q.如果系统检测到潜在的缓冲器下溢,则系统将减小拉格朗日乘数λ。 如果拉格朗日乘数λ低于最小λ阈值,则系统将降低量化器值Q。