公开(公告)号：US20120250772A1

公开(公告)日：2012-10-04

申请号：US13078852

申请日：2011-04-01

申请人： Wenfeng Gao ,  Yongjun Wu ,  Shyam Sadhwani

发明人： Wenfeng Gao ,  Yongjun Wu ,  Shyam Sadhwani

IPC分类号： H04N7/26

CPC分类号： H04N19/865 ,  H04N19/117 ,  H04N19/127 ,  H04N19/157 ,  H04N19/159 ,  H04N19/16 ,  H04N19/172 ,  H04N19/436 ,  H04N19/82 ,  H04N19/86

摘要： Multi-threaded implementations of deblock filtering improve encoding and/or decoding efficiency. For example, a video encoder or decoder partitions a video picture into multiple segments. The encoder/decoder selects between multiple different patterns for splitting operations of deblock filtering into multiple passes. The encoder/decoder organizes the deblock filtering as multiple tasks, where a given task includes the operations of one of the passes for one of the segments. The encoder/decoder then performs the tasks with multiple threads. The performance of the tasks is constrained by task dependencies which, in general, are based at least in part on which lines of the picture are in the respective segments and which deblock filtering operations are in the respective passes. The task dependencies can include a cross-pass, cross-segment dependency between a given pass of a given segment and an adjacent pass of an adjacent segment.

摘要翻译： 去块滤波的多线程实现提高了编码和/或解码效率。 例如，视频编码器或解码器将视频图像分割成多个段。 编码器/解码器在多个不同的模式之间进行选择，用于将去块滤波的分割操作分成多个通道。 编码器/解码器将去块滤波器组织为多个任务，其中给定任务包括其中一个段的一个通路的操作。 然后，编码器/解码器使用多个线程执行任务。 任务的执行受到任务依赖性的约束，通常，至少部分地基于图片的哪些行在相应的段中，以及哪些去块过滤操作在相应的遍历中。 任务依赖性可以包括给定段的给定遍和相邻段的相邻段之间的交叉遍，跨段依赖性。

公开(公告)号：US09042458B2

公开(公告)日：2015-05-26

申请号：US13078852

申请日：2011-04-01

申请人： Wenfeng Gao ,  Yongjun Wu ,  Shyam Sadhwani

发明人： Wenfeng Gao ,  Yongjun Wu ,  Shyam Sadhwani

IPC分类号： H04N7/26 ,  H04N19/86 ,  H04N19/159 ,  H04N19/172 ,  H04N19/127 ,  H04N19/16 ,  H04N19/436 ,  H04N19/82

CPC分类号： H04N19/865 ,  H04N19/117 ,  H04N19/127 ,  H04N19/157 ,  H04N19/159 ,  H04N19/16 ,  H04N19/172 ,  H04N19/436 ,  H04N19/82 ,  H04N19/86

摘要： Multi-threaded implementations of deblock filtering improve encoding and/or decoding efficiency. For example, a video encoder or decoder partitions a video picture into multiple segments. The encoder/decoder selects between multiple different patterns for splitting operations of deblock filtering into multiple passes. The encoder/decoder organizes the deblock filtering as multiple tasks, where a given task includes the operations of one of the passes for one of the segments. The encoder/decoder then performs the tasks with multiple threads. The performance of the tasks is constrained by task dependencies which, in general, are based at least in part on which lines of the picture are in the respective segments and which deblock filtering operations are in the respective passes. The task dependencies can include a cross-pass, cross-segment dependency between a given pass of a given segment and an adjacent pass of an adjacent segment.

摘要翻译： 去块滤波的多线程实现提高了编码和/或解码效率。 例如，视频编码器或解码器将视频图像分割成多个段。 编码器/解码器在多个不同的模式之间进行选择，用于将去块滤波的分割操作分成多个通道。 编码器/解码器将去块滤波器组织为多个任务，其中给定任务包括其中一个段的一个通路的操作。 然后，编码器/解码器使用多个线程执行任务。 任务的执行受到任务依赖性的约束，通常，至少部分地基于图片的哪些行在相应的段中以及哪些去块过滤操作在相应的遍历中。 任务依赖性可以包括给定段的给定遍和相邻段的相邻段之间的交叉，跨段依赖性。

公开(公告)号：US20120147973A1

公开(公告)日：2012-06-14

申请号：US12966914

申请日：2010-12-13

申请人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani

发明人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani

IPC分类号： H04N7/26

CPC分类号： H04N19/188 ,  H04N19/103 ,  H04N19/156 ,  H04N19/1883 ,  H04N19/42 ,  H04N19/44 ,  H04N19/70

摘要： Techniques and tools for reducing latency in video decoding for real-time communication applications that emphasize low delay. For example, a tool such as a video decoder selects a low-latency decoding mode. Based on the selected decoding mode, the tool adjusts output timing determination, picture boundary detection, number of pictures in flight and/or jitter buffer utilization. For low-latency decoding, the tool can use a frame count syntax element to set initial output delay for a decoded picture buffer, and the tool can use auxiliary delimiter syntax elements to detect picture boundaries. To further reduce delay in low-latency decoding, the tool can reduce number of pictures in flight for multi-threaded decoding and reduce or remove jitter buffers. The tool receives encoded data, performs decoding according to the selected decoding mode to reconstruct pictures, and outputs the pictures for display.

摘要翻译： 用于减少视频解码中延迟延迟的技术和工具，用于强调低延迟的实时通信应用。 例如，诸如视频解码器的工具选择低延迟解码模式。 基于选择的解码模式，该工具调整输出定时确定，图像边界检测，飞行中的图像数和/或抖动缓冲器利用率。 对于低延迟解码，该工具可以使用帧计数语法元素为解码图像缓冲区设置初始输出延迟，并且该工具可以使用辅助分隔符语法元素来检测图像边界。 为了进一步减少低延迟解码的延迟，该工具可以减少飞行中用于多线程解码的图片数量，并减少或删除抖动缓冲区。 该工具接收编码数据，根据选择的解码模式执行解码以重构图像，并输出用于显示的图像。

公开(公告)号：US08885729B2

公开(公告)日：2014-11-11

申请号：US12966914

申请日：2010-12-13

申请人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani

发明人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani

IPC分类号： H04N11/02 ,  H04N19/103 ,  H04N19/44 ,  H04N19/42 ,  H04N19/70 ,  H04N19/156

CPC分类号： H04N19/188 ,  H04N19/103 ,  H04N19/156 ,  H04N19/1883 ,  H04N19/42 ,  H04N19/44 ,  H04N19/70

摘要： Techniques and tools for reducing latency in video decoding for real-time communication applications that emphasize low delay. For example, a tool such as a video decoder selects a low-latency decoding mode. Based on the selected decoding mode, the tool adjusts output timing determination, picture boundary detection, number of pictures in flight and/or jitter buffer utilization. For low-latency decoding, the tool can use a frame count syntax element to set initial output delay for a decoded picture buffer, and the tool can use auxiliary delimiter syntax elements to detect picture boundaries. To further reduce delay in low-latency decoding, the tool can reduce number of pictures in flight for multi-threaded decoding and reduce or remove jitter buffers. The tool receives encoded data, performs decoding according to the selected decoding mode to reconstruct pictures, and outputs the pictures for display.

摘要翻译： 用于减少视频解码中延迟延迟的技术和工具，用于强调低延迟的实时通信应用。 例如，诸如视频解码器的工具选择低延迟解码模式。 基于选择的解码模式，该工具调整输出定时确定，图像边界检测，飞行中的图像数和/或抖动缓冲器利用率。 对于低延迟解码，该工具可以使用帧计数语法元素为解码图像缓冲区设置初始输出延迟，并且该工具可以使用辅助分隔符语法元素来检测图像边界。 为了进一步减少低延迟解码的延迟，该工具可以减少飞行中用于多线程解码的图片数量，并减少或删除抖动缓冲区。 该工具接收编码数据，根据选择的解码模式执行解码以重构图像，并输出用于显示的图像。

公开(公告)号：US20130051478A1

公开(公告)日：2013-02-28

申请号：US13223079

申请日：2011-08-31

申请人： Yongjun Wu ,  Shyam Sadhwani

发明人： Yongjun Wu ,  Shyam Sadhwani

IPC分类号： H04N7/26

CPC分类号： H04N19/423 ,  H04N19/0049 ,  H04N19/127 ,  H04N19/136 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/426 ,  H04N19/44

摘要： Techniques and tools described herein help manage memory efficiently during video decoding, especially when multiple video clips are concurrently decoded. For example, with clip-adaptive memory usage, a decoder determines first memory usage settings expected to be sufficient for decoding of a video clip. The decoder also determines second memory usage settings known to be sufficient for decoding of the clip. During decoding, memory usage is initially set according to the first settings. Memory usage is adaptively increased during decoding, subject to theoretical limits in the second settings. With adaptive early release of side information, the decoder can release side information memory for a picture earlier than the decoder releases image plane memory for the picture. The decoder can also adapt memory usage for decoded transform coefficients depending on whether the coefficients are for intra-coded blocks or inter-coded blocks, and also exploit the relative sparseness of non-zero coefficient values.

摘要翻译： 这里描述的技术和工具有助于在视频解码期间有效地管理存储器，特别是当多个视频片段被同时解码时。 例如，利用剪辑自适应存储器使用，解码器确定预期对视频剪辑的解码足够的第一存储器使用设置。 解码器还确定已知足以解码剪辑的第二存储器使用设置。 在解码期间，最初根据第一个设置设置内存使用。 存储器使用在解码期间自适应地增加，受到第二设置中的理论限制。 利用辅助信息的适应性早期释放，解码器可以在解码器释放用于图像的图像平面存储器之前释放用于图像的侧信息存储器。 解码器还可以根据系数是用于帧内编码块还是帧间编码块来适应解码变换系数的存储器使用，并且还利用非零系数值的相对稀疏度。

公开(公告)号：US09589540B2

公开(公告)日：2017-03-07

申请号：US13310812

申请日：2011-12-05

申请人： Yongjun Wu ,  Shyam Sadhwani ,  Naveen Thumpudi ,  Stephen Estrop ,  Glenn Evans

发明人： Yongjun Wu ,  Shyam Sadhwani ,  Naveen Thumpudi ,  Stephen Estrop ,  Glenn Evans

IPC分类号： G06F3/14 ,  G09G5/12 ,  G09G5/36 ,  G06F1/32 ,  G09G3/20

CPC分类号： G09G5/363 ,  G06F1/3265 ,  G06F3/1407 ,  G09G3/2092 ,  G09G5/12 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2370/04 ,  G09G2370/20 ,  Y02D10/153

摘要： A battery operated device, having a display with two or more available refresh rates, has its refresh rate selected so as to match the video frame rate of video data played back on the display. This selection is made by coordinating the resources in the device that are used to process the video from its reception through to its display.

摘要翻译： 具有具有两个或多个可用刷新率的显示器的电池供电装置具有选择其刷新率，以便与在显示器上播放的视频数据的视频帧速率相匹配。 该选择是通过协调用于处理从其接收到其显示的视频的设备中的资源来进行的。

公开(公告)号：US20110013889A1

公开(公告)日：2011-01-20

申请号：US12505444

申请日：2009-07-17

申请人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani ,  Naveen Thumpudi ,  Eric S. Christoffersen

发明人： Yongjun Wu ,  Gang Ji ,  Shyam Sadhwani ,  Naveen Thumpudi ,  Eric S. Christoffersen

IPC分类号： H04N5/91 ,  H04N11/04 ,  H04N7/26

CPC分类号： H04N5/93 ,  H04N5/783 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/44 ,  H04N19/61 ,  H04N19/70 ,  H04N19/89 ,  H04N21/23424 ,  H04N21/4384 ,  H04N21/44016 ,  H04N21/485

摘要： A video bit stream with pictures comprising inter-coded content can be decoded upon receiving a channel start or file seek instruction. Pictures for beginning decoding and display of the bit stream can be selected based at least in part on one or more tuning parameters that set a preference between a latency of beginning to display video and possible defects in the displayed video. In some embodiments, to implement decoding upon a channel start or file seek, one or more types of data are generated for one or more pictures. For example, picture order counts are generated for pictures after a channel start or file seek operation. As another example, a decoder generates a frame number value that triggers re-initialization of a reference picture buffer before decoding after a channel start or file seek operation.

摘要翻译： 可以在接收到频道开始或文件搜索指令时解码包括帧间编码内容的图像的视频比特流。 可以至少部分地基于在开始显示视频的等待时间和显示的视频中的可能缺陷之间设置偏好的一个或多个调谐参数来选择用于开始解码和显示比特流的图片。 在一些实施例中，为了在信道开始或文件寻找中实现解码，为一个或多个图像生成一个或多个类型的数据。 例如，在通道开始或文件搜索操作之后，为图像生成图像顺序计数。 作为另一示例，解码器生成在通道开始或文件搜索操作之前解码之前触发参考图像缓冲器的重新初始化的帧编号值。

公开(公告)号：US09706214B2

公开(公告)日：2017-07-11

申请号：US12978501

申请日：2010-12-24

申请人： Yongjun Wu ,  Shyam Sadhwani ,  Daniele Terdina

发明人： Yongjun Wu ,  Shyam Sadhwani ,  Daniele Terdina

IPC分类号： H04N7/50 ,  H04N19/44 ,  H04N19/176 ,  H04N19/122 ,  H04N19/127 ,  H04N19/14 ,  H03M7/40 ,  H04N19/46 ,  H04N19/436

CPC分类号： H04N19/44 ,  H04N19/122 ,  H04N19/127 ,  H04N19/14 ,  H04N19/176 ,  H04N19/436 ,  H04N19/46

摘要： Efficient operations in image or video decoding. For example, a tool such as an image or video decoder receives and decodes encoded data for a picture in a bitstream. As part of the decoding, the tool adapts a multi-symbol lookup table to use in decoding of symbols then decodes the symbols using the multi-symbol lookup table, producing exactly correct results. The tool can also perform selectively truncated inverse frequency transforms. For a given block, the tool identifies upper horizontal and vertical frequencies among non-zero coefficients for the block and, based on the upper frequency values, selectively applies a simplified inverse frequency transform to transform coefficients for the block without hurting decoding quality. Using restart markers in the bitstream, the tool can organize multiple blocks of the picture as partitions. The tool decodes at least some of the partitions in parallel on a partition-by-partition basis using multiple processing cores.

公开(公告)号：US08896715B2

公开(公告)日：2014-11-25

申请号：US12704047

申请日：2010-02-11

申请人： Yongjun Wu ,  Nikola Borisov ,  Weidong Zhao ,  Shyam Sadhwani ,  Naveen Thumpudi

发明人： Yongjun Wu ,  Nikola Borisov ,  Weidong Zhao ,  Shyam Sadhwani ,  Naveen Thumpudi

IPC分类号： H04N5/228 ,  H04N5/232

CPC分类号： H04N5/23267 ,  G06T3/0093 ,  G06T7/207 ,  H04L67/10 ,  H04N5/145 ,  H04N5/23248 ,  H04N5/23254 ,  H04N21/4223 ,  H04N21/44

摘要： Video image stabilization provides better performance on a generic platform for computing devices by evaluating available multimedia digital signal processing components, and selecting the available components to utilize according to a hierarchy structure for video stabilization performance for processing parts of the video stabilization. The video stabilization has improved motion vector estimation that employs refinement motion vector searching according to a pyramid block structure relationship starting from a downsampled resolution version of the video frames. The video stabilization also improves global motion transform estimation by performing a random sample consensus approach for processing the local motion vectors, and selection criteria for motion vector reliability. The video stabilization achieves the removal of hand shakiness smoothly by real-time one-pass or off-line two-pass temporal smoothing with error detection and correction.

摘要翻译： 视频图像稳定通过评估可用的多媒体数字信号处理组件，以及根据用于处理视频稳定化的部分的视频稳定性能的层次结构来选择可利用的组件来在计算设备的通用平台上提供更好的性能。 视频稳定已经改进了运动矢量估计，其采用根据从视频帧的下采样分辨率版本开始的金字塔块结构关系的细化运动矢量搜索。 视频稳定还通过执行用于处理局部运动矢量的随机样本共享方法以及用于运动矢量可靠性的选择标准来改进全局运动变换估计。 视频稳定通过具有错误检测和校正的实时一次或离线两遍时间平滑实现平滑地去除手抖动。

公开(公告)号：US20130215978A1

公开(公告)日：2013-08-22

申请号：US13399769

申请日：2012-02-17

申请人： Yongjun Wu ,  Shyam Sadhwani ,  Naveen Thumpudi

发明人： Yongjun Wu ,  Shyam Sadhwani ,  Naveen Thumpudi

IPC分类号： H04N7/26

CPC分类号： H04N19/44 ,  H04N19/103 ,  H04N19/12 ,  H04N19/129 ,  H04N19/157 ,  H04N19/174 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

摘要： A video decoder is disclosed that uses metadata in order to make optimization decisions. In one embodiment, metadata is used to choose which of multiple available decoder engines should receive a video sequence. In another embodiment, the optimization decisions can be based on length and location metadata information associated with a video sequence. Using such metadata information, a decoder engine can skip start-code scanning to make the decoding process more efficient. Also based on the choice of decoder engine, it can decide whether emulation prevention byte removal shall happen together with start code scanning or not.

摘要翻译： 公开了使用元数据以进行优化决定的视频解码器。 在一个实施例中，使用元数据来选择多个可用解码器引擎应当接收视频序列中的哪一个。 在另一个实施例中，优化决定可以基于与视频序列相关联的长度和位置元数据信息。 使用这样的元数据信息，解码器引擎可以跳过起始码扫描，以使解码过程更有效率。 同样基于解码器引擎的选择，它可以决定是否与启动代码扫描一起发生仿真预防字节删除。