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1. 发明授权

US06950463B2 Non-compensated transcoding of a video stream 失效
标题翻译：视频流的非补偿转码
公开(公告)号：US06950463B2
公开(公告)日：2005-09-27
申请号：US09880243
申请日：2001-06-13
申请人： Shankar Moni , Andrew W. Walters , John A. Tardif , Padma Parthasarathy
发明人： Shankar Moni , Andrew W. Walters , John A. Tardif , Padma Parthasarathy
IPC分类号： G06T9/00 , H04N7/26 , H04N7/30 , H04N7/50 , H04N7/12
CPC分类号： H04N19/40 , H04N19/115 , H04N19/126 , H04N19/152 , H04N19/162 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/42 , H04N19/60 , H04N19/61
摘要： Systems and methods for transcoding a transport stream or a video stream. A video stream includes a quantization matrix and a quantization scale that define how DCT frequency coefficients are quantized. A transport stream is transcoded by updating the quantization matrix and/or the quantization scale such that a new set of DCT frequency coefficients may be generated. Typically the quantization scale and/or the quantization matrix are updated such that the DCT frequency coefficients are more coarsely quantized such that their encoding consumes fewer bits. The quantization matrix can be updated such that select frequency coefficients are affected. Transcoding can operate at any level of the video stream, such as the frame level, the slice level, or the macroblock level. The bit rate of the video stream can therefore be adjusted or altered according to a current quantization level and a current bit rate.
摘要翻译：用于对传输流或视频流进行代码转换的系统和方法。视频流包括定义DCT频率系数如何量化的量化矩阵和量化比例。通过更新量化矩阵和/或量化尺度来转码传输流，使得可以生成新的DCT频率系数集合。通常，量化尺度和/或量化矩阵被更新，使得DCT频率系数被更粗略量化，使得它们的编码消耗较少的位。可以更新量化矩阵，使得选择频率系数受到影响。转码可以在视频流的任何级别（例如帧级，片级或宏块级）上操作。因此，可以根据当前的量化级别和当前比特率来调整或改变视频流的比特率。

2. 发明授权

US07636392B2 Non-compensated transcoding of a video stream 有权
标题翻译：视频流的非补偿转码
公开(公告)号：US07636392B2
公开(公告)日：2009-12-22
申请号：US10968252
申请日：2004-10-19
申请人： Shankar Moni , Andrew W. Walters , John A. Tardif , Padma Parthasarathy
发明人： Shankar Moni , Andrew W. Walters , John A. Tardif , Padma Parthasarathy
IPC分类号： H04N7/12 , G06K9/36
CPC分类号： H04N19/40 , H04N19/115 , H04N19/126 , H04N19/152 , H04N19/162 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/42 , H04N19/60 , H04N19/61
摘要： Systems and methods for transcoding a transport stream or a video stream. A video stream includes a quantization matrix and a quantization scale that define how DCT frequency coefficients are quantized. A transport stream is transcoded by updating the quantization matrix and/or the quantization scale such that a new set of DCT frequency coefficients may be generated. Typically the quantization scale and/or the quantization matrix are updated such that the DCT frequency coefficients are more coarsely quantized such that their encoding consumes fewer bits. The quantization matrix can be updated such that select frequency coefficients are affected. Transcoding can operate at any level of the video stream, such as the frame level, the slice level, or the macroblock level. The bit rate of the video stream can therefore be adjusted or altered according to a current quantization level and a current bit rate.
摘要翻译：用于对传输流或视频流进行代码转换的系统和方法。视频流包括定义DCT频率系数如何量化的量化矩阵和量化比例。通过更新量化矩阵和/或量化尺度来转码传输流，使得可以生成新的DCT频率系数集合。通常，量化尺度和/或量化矩阵被更新，使得DCT频率系数被更粗略量化，使得它们的编码消耗较少的位。可以更新量化矩阵，使得选择频率系数受到影响。转码可以在视频流的任何级别（例如帧级，片级或宏块级）上操作。因此，可以根据当前的量化级别和当前比特率来调整或改变视频流的比特率。

3. 发明申请

US20050078748A1 Non-compensated transcoding of a video stream 有权
公开(公告)号：US20050078748A1
公开(公告)日：2005-04-14
申请号：US10968252
申请日：2004-10-19
申请人： Shankar Moni , Andrew Walters , John Tardif , Padma Parthasarathy
发明人： Shankar Moni , Andrew Walters , John Tardif , Padma Parthasarathy
IPC分类号： G06T9/00 , H04N7/26 , H04N7/30 , H04N7/50 , H04N7/12
CPC分类号： H04N19/40 , H04N19/115 , H04N19/126 , H04N19/152 , H04N19/162 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/42 , H04N19/60 , H04N19/61
摘要： Systems and methods for transcoding a transport stream or a video stream. A video stream includes a quantization matrix and a quantization scale that define how DCT frequency coefficients are quantized. A transport stream is transcoded by updating the quantization matrix and/or the quantization scale such that a new set of DCT frequency coefficients may be generated. Typically the quantization scale and/or the quantization matrix are updated such that the DCT frequency coefficients are more coarsely quantized such that their encoding consumes fewer bits. The quantization matrix can be updated such that select frequency coefficients are affected. Transcoding can operate at any level of the video stream, such as the frame level, the slice level, or the macroblock level. The bit rate of the video stream can therefore be adjusted or altered according to a current quantization level and a current bit rate.

4. 发明授权

US06868124B2 Method and systems for compressing a video stream with minimal loss after subsampled decoding 失效
标题翻译：用于在采样解码后以最小损失压缩视频流的方法和系统
公开(公告)号：US06868124B2
公开(公告)日：2005-03-15
申请号：US09886693
申请日：2001-06-18
申请人： Shankar Moni , John A. Tardif
发明人： Shankar Moni , John A. Tardif
IPC分类号： H04N7/26 , H04N7/46 , H04N7/12
CPC分类号： H04N19/40 , H04N19/59
摘要： Transcoding of a video stream to reduce the size of the video stream with little, if any, loss in video quality after subsampling. After accessing a video stream of video pictures (i.e., video frames or fields), the blocks of the video picture are each subject to matrix pre-multiplication and post-multiplication. Such matrix multiplication does degrade the video quality if subsampling was not to occur. However, the pre-multiplication and post-multiplication matrices are calculated based on the subsampling matrices that will be used to ultimately subsample the video stream such that after subsampling eventually occurs, the matrix multiplications result in minimal loss of video quality.
摘要翻译：视频流的代码转换，以减少视频流的大小，如果有的话，二次抽样后的视频质量损失很小。在访问视频图像（即，视频帧或场）的视频流之后，视频图像的块各自经受矩阵预乘和后乘法。如果不进行子采样，这种矩阵乘法会降低视频质量。然而，基于将用于最终对视频流进行子采样的子采样矩阵来计算预乘法和后乘法矩阵，使得在子采样最终发生之后，矩阵乘法导致视频质量的最小损失。

5. 发明授权

US07627038B2 Methods and systems for compressing a video stream with minimal loss after subsampled decoding 有权
公开(公告)号：US07627038B2
公开(公告)日：2009-12-01
申请号：US10968529
申请日：2004-10-19
申请人： Shankar Moni , John A. Tardif
发明人： Shankar Moni , John A. Tardif
IPC分类号： H04N7/12 , G06K9/36
CPC分类号： H04N19/40 , H04N19/59
摘要： Transcoding of a video stream to reduce the size of the video stream with little, if any, loss in video quality after subsampling. After accessing a video stream of video pictures (i.e., video frames or fields), the blocks of the video picture are each subject to matrix pre-multiplication and post-multiplication. Such matrix multiplication does degrade the video quality if subsampling was not to occur. However, the pre-multiplication and post-multiplication matrices are calculated based on the subsampling matrices that will be used to ultimately subsample the video stream such that after subsampling eventually occurs, the matrix multiplications result in minimal loss of video quality.

6. 发明授权

US06804299B2 Methods and systems for reducing requantization-originated generational error in predictive video streams using motion compensation 有权
标题翻译：使用运动补偿来减少预测视频流中再次发生的代数误差的方法和系统
公开(公告)号：US06804299B2
公开(公告)日：2004-10-12
申请号：US09882736
申请日：2001-06-15
申请人： Shankar Moni , John A. Tardif
发明人： Shankar Moni , John A. Tardif
IPC分类号： H04N712
CPC分类号： H04N19/40 , H04N19/126 , H04N19/61 , H04N19/86
摘要： Adaptive compensation for requantization. A reference picture is decoded. Another copy of the reference picture is then requantized and then decoded. Next, an error picture is calculated and stored. The error picture represents the difference between the reference picture as decoded without requantization and the reference picture as decoded with requantization. The error picture and the requantized reference picture are used to generate a predictive picture that at least partially compensates for generational error introduced by requantization. This compensation for error may be adaptively performed based on system conditions.
摘要翻译：自适应补偿。参考图片被解码。然后对参考图片的另一个副本进行再编码，然后进行解码。接下来，计算并存储错误图。错误图表示不需要重新解码的参考图像与通过再量化解码的参考图像之间的差异。误差图像和再量化参考图像用于生成至少部分地补偿由重新量化引入的代数误差的预测图像。可以根据系统条件自适应地进行误差补偿。

7. 发明授权

US07436889B2 Methods and systems for reducing requantization-originated generational error in predictive video streams using motion compensation 有权
标题翻译：使用运动补偿来减少预测视频流中再次发生的代数误差的方法和系统
公开(公告)号：US07436889B2
公开(公告)日：2008-10-14
申请号：US10867268
申请日：2004-06-14
申请人： Shankar Moni , John A. Tardif
发明人： Shankar Moni , John A. Tardif
IPC分类号： H04N7/12
CPC分类号： H04N19/40 , H04N19/126 , H04N19/61 , H04N19/86
摘要： Adaptive compensation for requantization. A reference picture is decoded. Another copy of the reference picture is then requantized and then decoded. Next, an error picture is calculated and stored. The error picture represents the difference between the reference picture as decoded without requantization and the reference picture as decoded with requantization. The error picture and the requantized reference picture are used to generate a predictive picture that at least partially compensates for generational error introduced by requantization. This compensation for error may be adaptively performed based on system conditions.
摘要翻译：自适应补偿。参考图片被解码。然后对参考图片的另一个副本进行再编码，然后进行解码。接下来，计算并存储错误图。错误图表示不需要重新解码的参考图像与通过再量化解码的参考图像之间的差异。误差图像和再量化参考图像用于生成至少部分地补偿由重新量化引入的代数误差的预测图像。可以根据系统条件自适应地进行误差补偿。

8. 发明授权

US06697126B2 Intra-frame video error concealment 有权
标题翻译：帧内视频错误隐藏
公开(公告)号：US06697126B2
公开(公告)日：2004-02-24
申请号：US09780081
申请日：2001-02-09
申请人： Shankar Moni , John A. Tardif
发明人： Shankar Moni , John A. Tardif
IPC分类号： H04N521
CPC分类号： G06T5/005 , G06T5/20 , G06T2207/10016 , H04N5/21 , H04N19/895
摘要： Systems and methods for concealing video errors encountered in a frame of a static or moving image that can be used independently or in combination with conventional error concealment techniques, and can be used to conceal an error segment of any shape or location in a frame of a static or moving image. An error segment is identified. A first pixel set adjacent to the error segment and optionally one or more other pixel sets also adjacent to the error segment are selected corresponding the pixel set of the error segment and are flipped toward the error segment. The flipped pixel sets are then selectively weighted. Where only one pixel set is used, the flipped and weighted pixel set replaces the error segment to conceal the error segment. Where more than one pixel set is utilized, the pixel sets are added together to create a sum pixel set that replaces the pixels of the error segment to produce a smooth transition between the error segment and the adjacent, non-corrupt sets of pixels without any distracting boundaries. The smooth transition diminishes the visual impact of the error segment in the frame of the static or moving image.
摘要翻译：用于隐藏静态或运动图像帧中遇到的视频错误的系统和方法，其可以独立使用或与常规错误隐藏技术组合使用，并且可以用于隐藏任何形状或位置的错误段静态或运动图像。识别错误段。与误差段相邻的第一像素集合和可选地还与错误段相邻的一个或多个其它像素集合被选择，对应于误差段的像素集合并被朝向错误段翻转。然后，将翻转的像素组选择性地加权。在仅使用一个像素集合的情况下，翻转和加权像素集合替换错误段以隐藏错误段。在利用多于一个像素组的情况下，将像素集合相加在一起以产生替代误差段的像素的和像素集合，以在误差段和相邻的非损坏像素集合之间产生平滑过渡，而没有任何分心的边界平滑过渡减少了静态或运动图像帧中误差段的视觉冲击。

9. 发明授权

US08705630B2 Adapting one type of encoder to another type of encoder 有权
标题翻译：将一种类型的编码器适配到另一种类型的编码器
公开(公告)号：US08705630B2
公开(公告)日：2014-04-22
申请号：US11636104
申请日：2006-12-08
申请人： Derek Pappas , Atul Garg , Shankar Moni , Harikrishna M. Reddy , Matthew R. Longnecker , Christopher L. Mills , Ignatius B. Tjandrasuwita
发明人： Derek Pappas , Atul Garg , Shankar Moni , Harikrishna M. Reddy , Matthew R. Longnecker , Christopher L. Mills , Ignatius B. Tjandrasuwita
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04
CPC分类号： H04N19/196 , H04N19/436 , H04N19/51 , H04N19/513
摘要： Described are methods and systems for processing data. A motion estimator uses a block of an input frame of video data and a block of a reference frame of video data to generate motion vectors according to a first encoding scheme. A motion compensator produces half pel motion vectors from the motion vectors according to a second encoding scheme that is different from the first encoding scheme.
摘要翻译：描述了用于处理数据的方法和系统。运动估计器使用视频数据的输入帧的块和视频数据的参考帧的块来生成根据第一编码方案的运动矢量。运动补偿器根据与第一编码方案不同的第二编码方案从运动矢量产生半像素运动矢量。

10. 发明申请

US20100128788A1 SYSTEM AND METHOD FOR INTRA REFRESH IMPLEMENTATION WITH PSEUDO RANDOM NUMBER GENERATION 有权
标题翻译：用PSEUDO随机数生成进行内部实现的系统和方法
公开(公告)号：US20100128788A1
公开(公告)日：2010-05-27
申请号：US12650233
申请日：2009-12-30
申请人： Iole Moccagatta , Atul Garg , Shankar Moni , Dipankar Talukdar , Ignatius B. Tjandrasuwita , Sandeep Shyamsukha
发明人： Iole Moccagatta , Atul Garg , Shankar Moni , Dipankar Talukdar , Ignatius B. Tjandrasuwita , Sandeep Shyamsukha
IPC分类号： H04N7/32
CPC分类号： H04N19/17 , H04N19/107 , H04N19/136 , H04N19/176 , H04N19/61
摘要： Embodiments of the present invention include a method and system for encoding video data comprising accessing a picture to be encoded, wherein the picture comprises a plurality of macro-blocks. A plurality of programmable counters is associated with each macro-block to be encoded. A counter associated with a macro-block of the plurality of macro-blocks is accessed and a value of the counter is determined. The method further includes determining whether to encode the macro-block as an Intra or non-Intra based on the value of the counter. If the macro-block is encoded as Intra, its counter is reset. If the macro-block is encoded as non-Intra, its counter value is updated. The counter value may be reset with a random number. Counters can be programmed such that a region of interest is defined for updating associated macro-blocks with greater frequency.
摘要翻译：本发明的实施例包括一种用于对视频数据进行编码的方法和系统，包括访问要编码的图像，其中该图像包括多个宏块。多个可编程计数器与要编码的每个宏块相关联。访问与多个宏块中的宏块相关联的计数器，并且确定计数器的值。该方法还包括基于计数器的值来确定是否将宏块编码为Intra或非Intra。如果宏块被编码为Intra，则其计数器被复位。如果宏块被编码为非Intra，则其计数器值被更新。计数器值可以用随机数复位。可以对计数器进行编程，使得定义感兴趣区域以更新频率更新相关联的宏块。

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