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1. 发明授权

US09924184B2 Error detection, protection and recovery for video decoding 有权
公开(公告)号：US09924184B2
公开(公告)日：2018-03-20
申请号：US12217037
申请日：2008-06-30
申请人： Yongjun Wu , Eric S. Christoffersen , Naveen Thumpudi
发明人： Yongjun Wu , Eric S. Christoffersen , Naveen Thumpudi
IPC分类号： H04N7/12 , H04N19/44 , H04N19/61 , H04N19/89
CPC分类号： H04N19/44 , H04N19/61 , H04N19/89
摘要： Error detecting and protection innovations for video decoders are described. For example, in a multithreaded video decoder, a picture extent discovery (PED) task detects an error in a video bitstream which corrupts a picture. The PED task then determines any PED sub-stage which have been completed for the picture, and based on this determination, performs error-handing PED operations. In another example, an entropy decoding (ED) task checks validity on a macroblock-by-macroblock basis using a redundant buffer to avoid overflows. Additionally, error recovery innovations are described which facilitate playback of a video bit stream at an arbitrary position. For example, a video decoder chooses a picture in the bit stream after the arbitrary position at which to begin decoding based on a determination of acceptable recovery time and/or acceptable picture quality.

2. 发明申请

US20110013889A1 IMPLEMENTING CHANNEL START AND FILE SEEK FOR DECODER 有权
标题翻译：执行解码器的通道启动和文件查看
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。

3. 发明授权

US08340510B2 Implementing channel start and file seek for decoder 有权
标题翻译：实现解码器的通道启动和文件搜索
公开(公告)号：US08340510B2
公开(公告)日：2012-12-25
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： H04N5/93 , H04N5/783
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寻道指令时解码包含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。

4. 发明申请

US20090323820A1 Error detection, protection and recovery for video decoding 有权
标题翻译：视频解码的错误检测，保护和恢复
公开(公告)号：US20090323820A1
公开(公告)日：2009-12-31
申请号：US12217037
申请日：2008-06-30
申请人： Yongjun Wu , Eric S. Christoffersen , Naveen Thumpudi
发明人： Yongjun Wu , Eric S. Christoffersen , Naveen Thumpudi
IPC分类号： H04N7/26
CPC分类号： H04N19/44 , H04N19/61 , H04N19/89
摘要： Error detecting and protection innovations for video decoders are described. For example, in a multithreaded video decoder, a picture extent discovery (PED) task detects an error in a video bitstream which corrupts a picture. The PED task then determines any PED sub-stage which have been completed for the picture, and based on this determination, performs error-handing PED operations. In another example, an entropy decoding (ED) task checks validity on a macroblock-by-macroblock basis using a redundant buffer to avoid overflows. Additionally, error recovery innovations are described which facilitate playback of a video bit stream at an arbitrary position. For example, a video decoder chooses a picture in the bit stream after the arbitrary position at which to begin decoding based on a determination of acceptable recovery time and/or acceptable picture quality.
摘要翻译：描述视频解码器的错误检测和保护创新。例如，在多线程视频解码器中，图像扩展发现（PED）任务检测损坏图像的视频比特流中的错误。然后，PED任务确定已经为图像完成的任何PED子级，并且基于该确定，执行错误处理PED操作。在另一示例中，熵解码（ED）任务使用冗余缓冲器以逐个宏块为基础检查有效性以避免溢出。另外，描述了有助于在任意位置播放视频比特流的错误恢复创新。例如，视频解码器在基于可接受的恢复时间和/或可接受的图像质量的确定开始解码的任意位置之后的比特流中选择图像。

5. 发明授权

US09848209B2 Adaptive error detection for MPEG-2 error concealment 有权
公开(公告)号：US09848209B2
公开(公告)日：2017-12-19
申请号：US12061567
申请日：2008-04-02
申请人： Gang Ji , Yongjun Wu , Florin Folta , Naveen Thumpudi
发明人： Gang Ji , Yongjun Wu , Florin Folta , Naveen Thumpudi
IPC分类号： H04N19/46 , H04N19/895 , H04N19/176 , H04N19/134 , H04N19/61 , H04N19/18
CPC分类号： H04N19/895 , H04N19/134 , H04N19/176 , H04N19/18 , H04N19/46 , H04N19/61
摘要： A decoder which can detect errors in MPEG-2 coefficient blocks can identify syntactically-correct blocks which have out-of-bounds coefficients. The decoder computes coefficient bounds based on quantization scalers and quantization matrices and compares these to coefficient blocks during decoding; if a block has out-of-bounds coefficients, concealment is performed on the block. In a decoder implemented all in software, coefficient bounds checking is performed on iDCT coefficients against upper and lower bounds in a spatial domain. In a decoder which performs iDCT in hardware, DCT coefficients are compared to an upper energy bound.

6. 发明授权

US08189666B2 Local picture identifier and computation of co-located information 有权
标题翻译：本地图片标识符和共址信息的计算
公开(公告)号：US08189666B2
公开(公告)日：2012-05-29
申请号：US12364325
申请日：2009-02-02
申请人： Yongjun Wu , Naveen Thumpudi , Kim-chyan Gan
发明人： Yongjun Wu , Naveen Thumpudi , Kim-chyan Gan
IPC分类号： H04N7/36 , H04N11/02
CPC分类号： H04N19/44 , H04N19/102 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/513 , H04N19/61 , H04N19/70
摘要： Video decoding innovations for using local picture identifiers and computing co-located information are described. In one aspect, a decoder identifies reference pictures in a reference picture list of a temporal direct prediction mode macroblock that match reference pictures used by a co-located macroblock using local picture identifiers. In another aspect, a decoder determines whether reference pictures used by blocks are the same by comparing local picture identifiers during calculation of boundary strength. In yet another aspect, a decoder determines a picture type of a picture and based on the picture type selectively skips or simplifies computation of co-located information for use in reconstructing direct prediction mode macroblocks outside the picture.
摘要翻译：描述了使用本地图片标识符和计算共址信息的视频解码创新。在一个方面，解码器识别与使用本地图像标识符的同位置宏块使用的参考图片相匹配的时间直接预测模式宏块的参考图片列表中的参考图片。在另一方面，解码器通过在计算边界强度期间比较局部图像标识符来确定块使用的参考图片是否相同。在另一方面，解码器确定图像的图像类型并且基于图像类型有选择地跳过或简化用于重建图像外部的直接预测模式宏块的共位信息的计算。

7. 发明申请

US20100195721A1 LOCAL PICTURE IDENTIFIER AND COMPUTATION OF CO-LOCATED INFORMATION 有权
标题翻译：本地图像识别器和协同定位信息的计算
公开(公告)号：US20100195721A1
公开(公告)日：2010-08-05
申请号：US12364325
申请日：2009-02-02
申请人： Yongjun Wu , Naveen Thumpudi , Kim-chyan Gan
发明人： Yongjun Wu , Naveen Thumpudi , Kim-chyan Gan
IPC分类号： H04N7/32
CPC分类号： H04N19/44 , H04N19/102 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/513 , H04N19/61 , H04N19/70
摘要： Video decoding innovations for using local picture identifiers and computing co-located information are described. In one aspect, a decoder identifies reference pictures in a reference picture list of a temporal direct prediction mode macroblock that match reference pictures used by a co-located macroblock using local picture identifiers. In another aspect, a decoder determines whether reference pictures used by blocks are the same by comparing local picture identifiers during calculation of boundary strength. In yet another aspect, a decoder determines a picture type of a picture and based on the picture type selectively skips or simplifies computation of co-located information for use in reconstructing direct prediction mode macroblocks outside the picture.
摘要翻译：描述了使用本地图片标识符和计算共址信息的视频解码创新。在一个方面，解码器识别与使用本地图像标识符的同位置宏块使用的参考图片相匹配的时间直接预测模式宏块的参考图片列表中的参考图片。在另一方面，解码器通过在计算边界强度期间比较局部图像标识符来确定块使用的参考图片是否相同。在另一方面，解码器确定图像的图像类型并且基于图像类型有选择地跳过或简化用于重建图像外部的直接预测模式宏块的共位信息的计算。

8. 发明申请

US20090323826A1 Error concealment techniques in video decoding 有权
标题翻译：视频解码中的错误隐藏技术
公开(公告)号：US20090323826A1
公开(公告)日：2009-12-31
申请号：US12217039
申请日：2008-06-30
申请人： Yongjun Wu , Naveen Thumpudi , Daniel Dinu , William R. Sanders
发明人： Yongjun Wu , Naveen Thumpudi , Daniel Dinu , William R. Sanders
IPC分类号： H04N7/26
CPC分类号： H04N19/895
摘要： Error concealment techniques for video decoding are described. For example, a video decoder after finding a corrupted picture in a bit stream, finds a suitable neighbor for the corrupted picture. For example, the video decoder favors pictures with the same parity as the corrupted picture and considers picture order count and picture corruption in choosing a neighbor. The decoder then modifies syntax elements for the encoded video in the bit stream to allow the neighbor to be used in concealing the corruption in the corrupted picture. The modification of syntax elements can depend on the particular video decoder implementation. For example, in a software-only multithreaded video decoder, a task graph is modified, while in a system utilizing video acceleration, syntax elements for reference lists are modified.
摘要翻译：描述视频解码的错误隐藏技术。例如，在比特流中找到损坏的图像之后的视频解码器找到用于损坏的图像的合适的邻居。例如，视频解码器有利于与损坏的图像具有相同奇偶性的图像，并且在选择邻居时考虑图像顺序计数和图像损坏。然后，解码器修改比特流中编码视频的语法元素，以允许邻居用于隐藏损坏的图像中的损坏。语法元素的修改可以取决于特定的视频解码器实现。例如，在仅软件多线程视频解码器中，任务图被修改，而在利用视频加速的系统中，用于参考列表的语法元素被修改。

9. 发明申请

US20090252233A1 ADAPTIVE ERROR DETECTION FOR MPEG-2 ERROR CONCEALMENT 有权
标题翻译： MPEG-2错误隐藏的自适应错误检测
公开(公告)号：US20090252233A1
公开(公告)日：2009-10-08
申请号：US12061567
申请日：2008-04-02
申请人： Gang Ji , Yongjun Wu , Florin Folta , Naveen Thumpudi
发明人： Gang Ji , Yongjun Wu , Florin Folta , Naveen Thumpudi
IPC分类号： H04N7/26
CPC分类号： H04N19/895 , H04N19/134 , H04N19/176 , H04N19/18 , H04N19/46 , H04N19/61
摘要： A decoder which can detect errors in MPEG-2 coefficient blocks can identify syntactically-correct blocks which have out-of-bounds coefficients. The decoder computes coefficient bounds based on quantization scalers and quantization matrices and compares these to coefficient blocks during decoding; if a block has out-of-bounds coefficients, concealment is performed on the block. In a decoder implemented all in software, coefficient bounds checking is performed on iDCT coefficients against upper and lower bounds in a spatial domain. In a decoder which performs iDCT in hardware, DCT coefficients are compared to an upper energy bound.
摘要翻译：可以检测MPEG-2系数块中的错误的解码器可以识别具有超出界限系数的语法上正确的块。解码器基于量化缩放器和量化矩阵来计算系数界限，并在解码期间将其与系数块进行比较; 如果块具有超出范围的系数，则在块上执行隐藏。在以软件实现的解码器中，针对空间域中的上限和下限对iDCT系数执行系数边界检查。在硬件中执行iDCT的解码器中，将DCT系数与上限能量相比较。

10. 发明授权

US08896715B2 Generic platform video image stabilization 有权
标题翻译：通用平台视频图像稳定
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。

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