-
公开(公告)号：US08948266B2
公开(公告)日：2015-02-03
申请号：US11025297
申请日：2004-12-28
IPC分类号： H04N7/12 , H04N19/176 , H04N19/164 , H04N19/89 , H04N19/14 , H04N19/107 , H04N19/172 , H04N19/147 , H04N19/61
CPC分类号： H04N19/00278 , H04N19/107 , H04N19/14 , H04N19/147 , H04N19/164 , H04N19/172 , H04N19/176 , H04N19/61 , H04N19/89
摘要： An adaptive Intra-refresh (IR) technique for digital video encoding adjusts IR rate based on video content, or a combination of video content and channel condition. The IR rate may be applied at the frame level or macroblock (MB) level. At the frame level, the IR rate specifies the percentage of MBs to be Intra-coded within the frame. At the MB level, the IR rate defines a statistical probability that a particular MB is to be Intra-coded. The IR rate is adjusted in proportion to a combined metric that weighs estimated channel loss probability, frame-to-frame variation, and texture information. The IR rate can be determined using a close-form solution that requires relatively low implementation complexity. For example, such a close-form does not require iteration or an exhaustive search. In addition, the IR rate can be determined from parameters that are available before motion estimation and compensation are performed.
摘要翻译： 用于数字视频编码的自适应内部刷新（IR）技术基于视频内容或视频内容和频道条件的组合来调整IR速率。 可以在帧级或宏块（MB）级应用IR速率。 在帧级别，IR速率指定帧内帧内编码的百分比。 在MB级别，IR率定义了特定MB被内部编码的统计概率。 IR速率与重量估计的信道丢失概率，帧到帧变化和纹理信息的组合度量成比例地调整。 IR速率可以使用需要较低实现复杂度的紧密形式的解决方案来确定。 例如，这种关闭形式不需要迭代或穷尽搜索。 另外，可以在执行运动估计和补偿之前可用的参数来确定IR速率。
-
公开(公告)号：US08594180B2
公开(公告)日：2013-11-26
申请号：US11677335
申请日：2007-02-21
IPC分类号： G06F21/00
CPC分类号： H04N19/194 , H04N13/122 , H04N19/124 , H04N19/147 , H04N19/149 , H04N19/172 , H04N19/176 , H04N19/597 , H04N19/61
摘要： A stereo 3D video frame includes left and right components that are combined to produce a stereo image. For a given amount of distortion, the left and right components may have different impacts on perceptual visual quality of the stereo image due to asymmetry in the distortion response of the human eye. A 3D video encoder adjusts an allocation of coding bits between left and right components of the 3D video based on a frame-level bit budget and a weighting between the left and right components. The video encoder may generate the bit allocation in the rho (ρ) domain. The weighted bit allocation may be derived based on a quality metric that indicates overall quality produced by the left and right components. The weighted bit allocation compensates for the asymmetric distortion response to reduce overall perceptual distortion in the stereo image and thereby enhance or maintain visual quality.
摘要翻译： 立体3D视频帧包括组合以产生立体图像的左和右组件。 对于给定量的失真，由于人眼的失真响应的不对称，左和右分量可能对立体图像的感知视觉质量具有不同的影响。 3D视频编码器基于帧级比特预算和左右分量之间的加权来调整3D视频的左和右分量之间的编码比特的分配。 视频编码器可以在rho（rho）域中生成比特分配。 可以基于指示左组件和右组件产生的总体质量的质量度量来导出加权比特分配。 加权比特分配补偿非对称失真响应，以减少立体图像中的整体感知失真，从而增强或维持视觉质量。
-
公开(公告)号：US08090577B2
公开(公告)日：2012-01-03
申请号：US10215533
申请日：2002-08-08
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/0208 , G10L19/12 , G10L2019/0005
摘要： Methods and apparatus are presented for determining the type of acoustic signal and the type of frequency spectrum exhibited by the acoustic signal in order to selectively delete parameter information before vector quantization. The bits that would otherwise be allocated to the deleted parameters can then be re-allocated to the quantization of the remaining parameters, which results in an improvement of the perceptual quality of the synthesized acoustic signal. Alternatively, the bits that would have been allocated to the deleted parameters are dropped, resulting in an overall bit-rate reduction.
摘要翻译： 提出了用于确定声信号的类型和声信号显示的频谱的类型的方法和装置，以便在矢量量化之前选择性地删除参数信息。 否则将分配给删除的参数的位可以被重新分配给剩余参数的量化，这导致合成声信号的感知质量的改善。 或者，将分配给删除的参数的位将被丢弃，导致整体比特率降低。
-
公开(公告)号：US20080198920A1
公开(公告)日：2008-08-21
申请号：US11677335
申请日：2007-02-21
IPC分类号： G06T15/00
CPC分类号： H04N19/194 , H04N13/122 , H04N19/124 , H04N19/147 , H04N19/149 , H04N19/172 , H04N19/176 , H04N19/597 , H04N19/61
摘要： A stereo 3D video frame includes left and right components that are combined to produce a stereo image. For a given amount of distortion, the left and right components may have different impacts on perceptual visual quality of the stereo image due to asymmetry in the distortion response of the human eye. A 3D video encoder adjusts an allocation of coding bits between left and right components of the 3D video based on a frame-level bit budget and a weighting between the left and right components. The video encoder may generate the bit allocation in the rho (ρ) domain. The weighted bit allocation may be derived based on a quality metric that indicates overall quality produced by the left and right components. The weighted bit allocation compensates for the asymmetric distortion response to reduce overall perceptual distortion in the stereo image and thereby enhance or maintain visual quality.
摘要翻译： 立体3D视频帧包括组合以产生立体图像的左和右组件。 对于给定量的失真，由于人眼的失真响应的不对称，左和右分量可能对立体图像的感知视觉质量具有不同的影响。 3D视频编码器基于帧级比特预算和左右分量之间的加权来调整3D视频的左和右分量之间的编码比特的分配。 视频编码器可以在rho（rho）域中生成比特分配。 可以基于指示左组件和右组件产生的总体质量的质量度量来导出加权比特分配。 加权比特分配补偿非对称失真响应，以减少立体图像中的整体感知失真，从而增强或维持视觉质量。
-
公开(公告)号：US07406096B2
公开(公告)日：2008-07-29
申请号：US10313264
申请日：2002-12-06
IPC分类号： H04J3/16
CPC分类号： G10L19/173 , H04W88/181
摘要： Techniques are presented herein to provide tandem-free operation between two wireless terminals through two otherwise incompatible wireless networks. Specifically, embodiments provide tandem-free operation between a wireless terminal communicating through a continuous transmission (CTX) wireless channel to a wireless terminal communicating through a discontinuous transmission (DTX) wireless channel. In a first aspect, inactive speech frames are translated between DTX and CTX formats. In a second aspect, each wireless terminal includes an active speech decoder that is compatible with the active speech encoder on the opposite end of the mobile-to-mobile connection.
摘要翻译： 本文提供了技术，以通过两个否则不兼容的无线网络在两个无线终端之间提供无串联操作。 具体地，实施例在通过连续传输（CTX）无线信道通信到通过不连续传输（DTX）无线信道进行通信的无线终端的无线终端之间提供无串联操作。 在第一方面，非活动语音帧在DTX和CTX格式之间被转换。 在第二方面，每个无线终端包括与移动到移动连接的相对端上的活动语音编码器兼容的活动语音解码器。
-
公开(公告)号：US20080288245A1
公开(公告)日：2008-11-20
申请号：US12181972
申请日：2008-07-29
IPC分类号： G10L19/00
CPC分类号： G10L19/173 , H04W88/181
摘要： Techniques are presented herein to provide tandem-free operation between two wireless terminals through two otherwise incompatible wireless networks. Specifically, embodiments provide tandem-free operation between a wireless terminal communicating through a continuous transmission (CTX) wireless channel to a wireless terminal communicating through a discontinuous transmission (DTX) wireless channel. In a first aspect, inactive speech frames are translated between DTX and CTX formats. In a second aspect, each wireless terminal includes an active speech decoder that is compatible with the active speech encoder on the opposite end of the mobile-to-mobile connection.
摘要翻译： 本文提供了技术，以通过两个否则不兼容的无线网络在两个无线终端之间提供无串联操作。 具体地，实施例在通过连续传输（CTX）无线信道通信到通过不连续传输（DTX）无线信道进行通信的无线终端的无线终端之间提供无串联操作。 在第一方面，非活动语音帧在DTX和CTX格式之间被转换。 在第二方面，每个无线终端包括与移动到移动连接的相对端上的活动语音编码器兼容的活动语音解码器。
-
7.发明授权Deblock filtering techniques for video coding according to multiple video standards 有权根据多种视频标准进行视频编码的去块滤波技术公开(公告)号：US08045615B2
公开(公告)日：2011-10-25
申请号：US11136980
申请日：2005-05-25
申请人： Yi Liang , Sharath Manjunath
发明人： Yi Liang , Sharath Manjunath
IPC分类号： H04B1/66
CPC分类号： H04N19/86 , H04N19/117 , H04N19/42 , H04N19/61 , H04N19/82
摘要： This disclosure describes deblock filtering techniques in which an in-loop deblock filter of a first codec is used as a post deblock filter of a second codec. A number of techniques are also described to facilitate input parameter adjustments and allow for the effective use of the filter with both codecs. The techniques can simplify the architecture of a device that includes multiple codecs operating according to different coding standards. Specifically, the different codecs can use the same deblocking filter regardless of whether the coding standard calls for in-loop filtering or whether post filtering is used. For example, a filter designed as an in-loop deblocking filter for a codec that complies with the ITU-T H.264 coding standard can be used as a post deblocking filter for MPEG-4 video.
摘要翻译： 本公开描述了去块滤波技术，其中第一编解码器的循环去块滤波器被用作第二编解码器的后去块滤波器。 还描述了许多技术来促进输入参数调整并允许有效地使用具有两个编解码器的滤波器。 这些技术可以简化包括根据不同编码标准操作的多个编解码器的设备的架构。 具体来说，不管编码标准是要求进行环路过滤还是使用后置过滤，不同的编解码器都可以使用相同的去块滤波器。 例如，设计为符合ITU-T H.264编码标准的编解码器的内循环去块滤波器的滤波器可以用作MPEG-4视频的后去块滤波器。
-
公开(公告)号：US20060078051A1
公开(公告)日：2006-04-13
申请号：US11025297
申请日：2004-12-28
申请人： Yi Liang , Khaled El-Maleh , Sharath Manjunath
发明人： Yi Liang , Khaled El-Maleh , Sharath Manjunath
CPC分类号： H04N19/00278 , H04N19/107 , H04N19/14 , H04N19/147 , H04N19/164 , H04N19/172 , H04N19/176 , H04N19/61 , H04N19/89
摘要： An adaptive Intra-refresh (IR) technique for digital video encoding adjusts IR rate based on video content, or a combination of video content and channel condition. The IR rate may be applied at the frame level or macroblock (MB) level. At the frame level, the IR rate specifies the percentage of MBs to be Intra-coded within the frame. At the MB level, the IR rate defines a statistical probability that a particular MB is to be Intra-coded. The IR rate is adjusted in proportion to a combined metric that weighs estimated channel loss probability, frame-to-frame variation, and texture information. The IR rate can be determined using a close-form solution that requires relatively low implementation complexity. For example, such a close-form does not require iteration or an exhaustive search. In addition, the IR rate can be determined from parameters that are available before motion estimation and compensation are performed.
-
9.发明申请Deblock filtering techniques for video coding according to multiple video standards 有权根据多种视频标准进行视频编码的去块滤波技术公开(公告)号：US20060268985A1
公开(公告)日：2006-11-30
申请号：US11136980
申请日：2005-05-25
申请人： Yi Liang , Sharath Manjunath
发明人： Yi Liang , Sharath Manjunath
IPC分类号： H04B1/66
CPC分类号： H04N19/86 , H04N19/117 , H04N19/42 , H04N19/61 , H04N19/82
摘要： This disclosure describes deblock filtering techniques in which an in-loop deblock filter of a first codec is used as a post deblock filter of a second codec. A number of techniques are also described to facilitate input parameter adjustments and allow for the effective use of the filter with both codecs. The techniques can simplify the architecture of a device that includes multiple codecs operating according to different coding standards. Specifically, the different codecs can use the same deblocking filter regardless of whether the coding standard calls for in-loop filtering or whether post filtering is used. For example, a filter designed as an in-loop deblocking filter for a codec that complies with the ITU-T H.264 coding standard can be used as a post deblocking filter for MPEG-4 video.
摘要翻译： 本公开描述了去块滤波技术，其中第一编解码器的循环去块滤波器被用作第二编解码器的后去块滤波器。 还描述了许多技术来促进输入参数调整并允许有效地使用具有两个编解码器的滤波器。 这些技术可以简化包括根据不同编码标准操作的多个编解码器的设备的架构。 具体来说，不管编码标准是要求进行环路过滤还是使用后置过滤，不同的编解码器都可以使用相同的去块滤波器。 例如，设计为符合ITU-T H.264编码标准的编解码器的内循环去块滤波器的滤波器可以用作MPEG-4视频的后去块滤波器。
-
公开(公告)号：US08379734B2
公开(公告)日：2013-02-19
申请号：US11690132
申请日：2007-03-23
申请人： Chia-Yuan Teng , Sharath Manjunath
发明人： Chia-Yuan Teng , Sharath Manjunath
IPC分类号： H04N7/68
CPC分类号： H04N19/00939 , H04N19/107 , H04N19/117 , H04N19/142 , H04N19/159 , H04N19/166 , H04N19/174 , H04N19/895
摘要： Error concealment is used to hide the effects of errors detected within digital video information. A complex error concealment mode decision is disclosed to determine whether spatial error concealment (SEC) or temporal error concealment (TEC) should be used. The error concealment mode decision system uses different methods depending on whether the damaged frame is an intra-frame or an inter-frame. If the video frame is an intra-frame then a similarity metric is used to determine if the intra-frame represents a scene-change or not. If the video frame is an intra-frame, a complex multi-termed equation is used to determine whether SEC or TEC should be used. A novel spatial error concealment technique is disclosed for use when the error concealment mode decision determines that spatial error concealment should be used for reconstruction. The novel spatial error concealment technique divides a corrupt macroblock into four different regions, a corner region, a row adjacent to the corner region, a column adjacent to the corner region, and a remainder main region. Those regions are then reconstructed in that order and information from earlier reconstructed regions may be used in later reconstructed regions. Finally, a macroblock refreshment technique is disclosed for preventing error propagation from harming non-corrupt inter-blocks. Specifically, an inter-macroblock may be ‘refreshed’ using spatial error concealment if there has been significant error caused damage that may cause the inter-block to propagate the errors.
摘要翻译： 错误隐藏用于隐藏数字视频信息中检测到的错误的影响。 公开了一种复杂的错误隐藏模式决定，以确定是否应使用空间误差隐藏（SEC）或时间误差隐藏（TEC）。 错误隐藏模式决策系统使用不同的方法，取决于损坏的帧是帧内还是帧间。 如果视频帧是帧内帧，则使用相似性度量来确定帧内是否表示场景改变。 如果视频帧是帧内帧，则使用复数多方程来确定是否应使用SEC或TEC。 当错误隐藏模式决定确定空间误差隐藏应用于重建时，公开了一种新颖的空间误差隐藏技术。 新颖的空间误差隐藏技术将腐败的宏块分为四个不同的区域，一个角区域，一个与拐角区域相邻的一行，一个邻近拐角区域的列以及一个剩余的主区域。 然后按照该顺序重建那些区域，并且可以在稍后的重建区域中使用来自较早重建区域的信息。 最后，公开了一种宏块刷新技术，用于防止错误传播损害非损坏的块间。 具体地，如果存在可能导致块间传播错误的严重错误引起的损坏，则可以使用空间错误隐藏来刷新宏块间宏块。
-
-
-
-
-
-
-
-
-
搜索结果
71 条记录 (耗时 0.023 秒)
