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1. 发明申请

US20110019736A1 IMAGE ENCODING DEVICE AND IMAGE ENCODING METHOD 有权
标题翻译：图像编码设备和图像编码方法
公开(公告)号：US20110019736A1
公开(公告)日：2011-01-27
申请号：US12840672
申请日：2010-07-21
申请人： Kyohei KOYABU , Takaaki Fuchie
发明人： Kyohei KOYABU , Takaaki Fuchie
IPC分类号： H04N7/26
CPC分类号： H04N19/00187 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/159 , H04N19/176 , H04N19/194
摘要： An image encoding device includes: a first encoding unit for calculating a generated code amount when encoding image data using a fixed quantizing parameter, and block distinction regarding whether a macro block is a block for performing temporal prediction or block for performing spatial prediction regarding a picture for predicting a temporal direction; a code amount control unit for setting the offset amount of a quantizing parameter so as to have great code amount to be assigned to a picture including many images to be referenced according to a percentage between the block for temporal prediction, and the block for spatial prediction based on the results of the block distinction, and determining a quantizing parameter based on the generated code amount calculated at the first encoding unit; and a second encoding unit for encoding the image data using the offset quantizing parameter for realizing a target generated code amount.
摘要翻译：一种图像编码装置包括：第一编码单元，用于当使用固定的量化参数对图像数据进行编码时计算生成的代码量，以及关于宏块是否是用于执行时间预测的块或用于执行关于图像的空间预测的块的块区分用于预测时间方向; 编码量控制单元，用于将量化参数的偏移量设置为具有根据用于时间预测的块之间的百分比来分配给包括要参考的许多图像的图像的大代码量，以及用于空间预测的块基于所述块区分的结果，并且基于在所述第一编码单元计算出的所生成的代码量来确定量化参数; 以及第二编码单元，用于使用用于实现目标生成代码量的偏移量化参数对图像数据进行编码。

2. 发明申请

US20080247469A1 METHOD AND DEVICE FOR TRACKING ERROR PROPAGATION AND REFRESHING A VIDEO STREAM 有权
标题翻译：用于跟踪错误传播和刷新视频流的方法和设备
公开(公告)号：US20080247469A1
公开(公告)日：2008-10-09
申请号：US11696196
申请日：2007-04-04
申请人： Sarat Chandra Vadapalli , Sriram Sethuraman
发明人： Sarat Chandra Vadapalli , Sriram Sethuraman
IPC分类号： H04N11/02
CPC分类号： H04N19/00187 , H04N19/107 , H04N19/15 , H04N19/176 , H04N19/194 , H04N19/61 , H04N19/89 , H04N19/90
摘要： A method and device for tracking error propagation and refreshing a video stream is provided. The proposed subject matter comprises of an error propagation tracking method that works in the sub-sampled domain to reduce computational cycles and memory bandwidth. Further, the tracking based update of the error propagation metric is done differently for static and non-static regions to avoid unnecessary refresh of static areas. Through suitable thresholding of the metric at a macroblock (MB) level, a set of refresh MBs are selected for each frame. These refresh MBs are coded either as an intra MB or as an inter MB that is predicted from one or more reliable reference frames (—frames that are known to be available at the decoder with negligible errors—). Such inter coding of refresh MBs improves the compression efficiency when compared to pure intra coding of refresh MBs. Further, variants to the threshold selection are presented that result in temporally uniform distribution of the number of refresh MBs and a strict refresh scheme wherein all MBs are guaranteed to be with negligible errors following a packet loss within a committed refresh period. In addition, to using the error propagation metric, spatial connectivity to already chosen refresh MBs is used in the selection of additional refresh MBs within a frame and across frames; this reduces the rate of error propagation due to part of a macroblock predicting from older, erroneous neighboring MBs and in turn requiring more refresh MBs on the average per frame.
摘要翻译：提供了用于跟踪误差传播和刷新视频流的方法和装置。提出的主题包括在子采样域中工作的误差传播跟踪方法，以减少计算周期和存储器带宽。此外，对于静态和非静态区域，错误传播度量的基于跟踪的更新是不同的，以避免不必要的刷新静态区域。通过对宏块（MB）级别的度量的适当阈值处理，为每个帧选择一组刷新MB。这些刷新MB被编码为内部MB或作为从一个或多个可靠参考帧（已知在解码器处可用的可忽略错误的帧）预测的帧间MB）。与刷新MB的纯内部编码相比，刷新MB的这种帧间编码提高了压缩效率。此外，呈现阈值选择的变体，其导致刷新MB的数量的时间上均匀分布，以及严格刷新方案，其中所有MB在保证的刷新周期内的分组丢失之后被保证具有可忽略的错误。此外，为了使用误差传播度量，在已经选择的刷新MB的空间连接性被用于选择帧内和跨帧的附加刷新MB; 这降低了由于从旧的错误的相邻MB预测的宏块的一部分而导致的误差传播速率，并且进而需要每帧平均更多的刷新MB。

3. 发明授权

US08861596B2 Image encoding device and image encoding method 有权
标题翻译：图像编码装置和图像编码方法
公开(公告)号：US08861596B2
公开(公告)日：2014-10-14
申请号：US12840672
申请日：2010-07-21
申请人： Kyohei Koyabu , Takaaki Fuchie
发明人： Kyohei Koyabu , Takaaki Fuchie
IPC分类号： H04N11/02 , H04N11/04 , H04N7/12 , H04N19/15 , H04N19/176 , H04N19/115 , H04N19/194 , H04N19/124
CPC分类号： H04N19/00187 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/159 , H04N19/176 , H04N19/194
摘要： An image encoding device includes: a first encoding unit for calculating a generated code amount when encoding image data using a fixed quantizing parameter, and block distinction regarding whether a macro block is a block for performing temporal prediction or block for performing spatial prediction regarding a picture for predicting a temporal direction; a code amount control unit for setting the offset amount of a quantizing parameter so as to have great code amount to be assigned to a picture including many images to be referenced according to a percentage between the block for temporal prediction, and the block for spatial prediction based on the results of the block distinction, and determining a quantizing parameter based on the generated code amount calculated at the first encoding unit; and a second encoding unit for encoding the image data using the offset quantizing parameter for realizing a target generated code amount.
摘要翻译：一种图像编码装置包括：第一编码单元，用于当使用固定的量化参数对图像数据进行编码时计算生成的代码量，以及关于宏块是否是用于执行时间预测的块或用于执行关于图像的空间预测的块的块区分用于预测时间方向; 编码量控制单元，用于将量化参数的偏移量设置为具有根据用于时间预测的块之间的百分比来分配给包括要参考的许多图像的图像的大代码量，以及用于空间预测的块基于所述块区分的结果，并且基于在所述第一编码单元计算出的所生成的代码量来确定量化参数; 以及第二编码单元，用于使用用于实现目标生成代码量的偏移量化参数对图像数据进行编码。

4. 发明授权

US08824567B2 Method and device for tracking error propagation and refreshing a video stream 有权
标题翻译：用于跟踪错误传播和刷新视频流的方法和设备
公开(公告)号：US08824567B2
公开(公告)日：2014-09-02
申请号：US11696196
申请日：2007-04-04
申请人： Sarat Chandra Vadapalli , Sriram Sethuraman
发明人： Sarat Chandra Vadapalli , Sriram Sethuraman
IPC分类号： H04N7/12 , H04N7/50 , H04N7/26
CPC分类号： H04N19/00187 , H04N19/107 , H04N19/15 , H04N19/176 , H04N19/194 , H04N19/61 , H04N19/89 , H04N19/90
摘要： A method and device for tracking error propagation and refreshing a video stream is provided. The proposed subject matter comprises of an error propagation tracking method that works in the sub-sampled domain to reduce computational cycles and memory bandwidth. Further, the tracking based update of the error propagation metric is done differently for static and non-static regions to avoid unnecessary refresh of static areas. Through suitable thresholding of the metric at a macroblock (MB) level, a set of refresh MBs are selected for each frame. These refresh MBs are coded either as an intra MB or as an inter MB that is predicted from one or more reliable reference frames (—frames that are known to be available at the decoder with negligible errors—). Such inter coding of refresh MBs improves the compression efficiency when compared to pure intra coding of refresh MBs. Further, variants to the threshold selection are presented that result in temporally uniform distribution of the number of refresh MBs and a strict refresh scheme wherein all MBs are guaranteed to be with negligible errors following a packet loss within a committed refresh period. In addition, to using the error propagation metric, spatial connectivity to already chosen refresh MBs is used in the selection of additional refresh MBs within a frame and across frames; this reduces the rate of error propagation due to part of a macroblock predicting from older, erroneous neighboring MBs and in turn requiring more refresh MBs on the average per frame.
摘要翻译：提供了用于跟踪误差传播和刷新视频流的方法和装置。提出的主题包括在子采样域中工作的误差传播跟踪方法，以减少计算周期和存储器带宽。此外，对于静态和非静态区域，错误传播度量的基于跟踪的更新是不同的，以避免不必要的刷新静态区域。通过对宏块（MB）级别的度量的适当阈值处理，为每个帧选择一组刷新MB。这些刷新MB被编码为内部MB或作为从一个或多个可靠参考帧（已知在解码器处可用的可忽略错误的帧）预测的帧间MB）。与刷新MB的纯内部编码相比，刷新MB的这种帧间编码提高了压缩效率。此外，呈现阈值选择的变体，其导致刷新MB的数量的时间上均匀分布，以及严格刷新方案，其中所有MB在保证的刷新周期内的分组丢失之后被保证具有可忽略的错误。此外，为了使用误差传播度量，在已经选择的刷新MB的空间连接性被用于选择帧内和跨帧的附加刷新MB; 这降低了由于从旧的错误的相邻MB预测的宏块的一部分而导致的误差传播速率，并且进而需要每帧平均更多的刷新MB。

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