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1. 发明授权

US08817884B2 Techniques for perceptual encoding of video frames 有权
标题翻译：视频帧感知编码技术
公开(公告)号：US08817884B2
公开(公告)日：2014-08-26
申请号：US12951035
申请日：2010-11-20
申请人： Arun Shankar Kudana , Ajit Venkat Rao , Soyeb Nagori , Manoj Koul , Zhan Ma , Do-Kyoung Kwon
发明人： Arun Shankar Kudana , Ajit Venkat Rao , Soyeb Nagori , Manoj Koul , Zhan Ma , Do-Kyoung Kwon
IPC分类号： H04N7/18 , H04N7/26
CPC分类号： H04N19/00175 , H04N19/107 , H04N19/109 , H04N19/124 , H04N19/14 , H04N19/147 , H04N19/167 , H04N19/17 , H04N19/18 , H04N19/182 , H04N19/19 , H04N19/80 , H04N19/87
摘要： In a video encoder, pixel values of a macro-block are processed to determine an activity measure indicative of the type of content in the macro-block. Several techniques are employed for determining the activity measure of a macro-block. In an embodiment, a default quantization scale for quantizing a macro-block is modified based on the activity measure of the macro-block. In another embodiment, the macro-block is classified into one of multiple classes based on its activity measure. The default quantization scale for quantizing the macro-block is modified based on the classification of the macro-block. In yet another embodiment, an encoding mode to be used for encoding a macro-block is also determined on the basis of the class of the macro-block. Several of the techniques exploit the fact that the human visual system (HVS) has different sensitivities in perceiving a (rendered) macro-block or video frame, depending on the type of macro-block content.
摘要翻译：在视频编码器中，处理宏块的像素值以确定指示宏块中的内容类型的活动度量。采用几种技术来确定宏块的活动度量。在一个实施例中，基于宏块的活动度量来修改用于量化宏块的默认量化尺度。在另一个实施例中，基于其活动度量将宏块分类为多个类别之一。基于宏块的分类修改用于量化宏块的默认量化尺度。在另一个实施例中，还根据宏块的类确定用于编码宏块的编码模式。几种技术利用人类视觉系统（HVS）根据宏块内容的类型在感知（渲染）宏块或视频帧时具有不同的灵敏度。

2. 发明申请

US20110122942A1 TECHNIQUES FOR PERCEPTUAL ENCODING OF VIDEO FRAMES 有权
标题翻译：用于视频编码视频框架的技术
公开(公告)号：US20110122942A1
公开(公告)日：2011-05-26
申请号：US12951035
申请日：2010-11-20
申请人： Arun Shankar Kudana , Ajit Venkat Rao , Soyeb Nagori , Manoj Koul , Zhan Ma , Do-Kyoung Kwon
发明人： Arun Shankar Kudana , Ajit Venkat Rao , Soyeb Nagori , Manoj Koul , Zhan Ma , Do-Kyoung Kwon
IPC分类号： H04N7/26
CPC分类号： H04N19/00175 , H04N19/107 , H04N19/109 , H04N19/124 , H04N19/14 , H04N19/147 , H04N19/167 , H04N19/17 , H04N19/18 , H04N19/182 , H04N19/19 , H04N19/80 , H04N19/87
摘要： In a video encoder, pixel values of a macro-block are processed to determine an activity measure indicative of the type of content in the macro-block. Several techniques are employed for determining the activity measure of a macro-block. In an embodiment, a default quantization scale for quantizing a macro-block is modified based on the activity measure of the macro-block. In another embodiment, the macro-block is classified into one of multiple classes based on its activity measure. The default quantization scale for quantizing the macro-block is modified based on the classification of the macro-block. In yet another embodiment, an encoding mode to be used for encoding a macro-block is also determined on the basis of the class of the macro-block. Several of the techniques exploit the fact that the human visual system (HVS) has different sensitivities in perceiving a (rendered) macro-block or video frame, depending on the type of macro-block content.
摘要翻译：在视频编码器中，处理宏块的像素值以确定指示宏块中的内容类型的活动度量。采用几种技术来确定宏块的活动度量。在一个实施例中，基于宏块的活动度量来修改用于量化宏块的默认量化尺度。在另一个实施例中，基于其活动度量将宏块分类为多个类别之一。基于宏块的分类修改用于量化宏块的默认量化尺度。在另一个实施例中，还根据宏块的类确定用于编码宏块的编码模式。几种技术利用人类视觉系统（HVS）根据宏块内容的类型在感知（渲染）宏块或视频帧时具有不同的灵敏度。

3. 发明申请

US20100309981A1 REUSE OF A SEARCH REGION IN MOTION ESTIMATION OF MULTIPLE TARGET FRAMES 审中-公开
标题翻译：多个目标框架的运动估计搜索区域的重用
公开(公告)号：US20100309981A1
公开(公告)日：2010-12-09
申请号：US12477963
申请日：2009-06-04
申请人： SOYEB NAGORI , Arun Shankar Kudana , Ajit Venkat Rao
发明人： SOYEB NAGORI , Arun Shankar Kudana , Ajit Venkat Rao
IPC分类号： H04N7/26
CPC分类号： H04N19/57 , H04N19/423 , H04N19/43 , H04N19/61
摘要： Several methods and a system to reuse a search region in motion estimation of multiple target frames are disclosed. In an embodiment, a method includes acquiring a search region of a reference frame. The method also includes maintaining the search region in a memory. In addition, the method includes performing motion estimation of a macroblock of a target frame in a direction using a processor and the search region. The method also includes reusing the search region maintained in the memory to perform motion estimation of an additional macroblock of an additional target frame in an additional direction. The method may include reusing the search region maintained in the memory to perform motion estimation of a separate macroblock of a separate target frame in a separate direction.
摘要翻译：公开了在多个目标帧的运动估计中重用搜索区域的几种方法和系统。在一个实施例中，一种方法包括获取参考帧的搜索区域。该方法还包括将搜索区域保持在存储器中。此外，该方法包括使用处理器和搜索区域在方向上执行目标帧的宏块的运动估计。该方法还包括重新使用保持在存储器中的搜索区域，以在附加方向上执行附加目标帧的附加宏块的运动估计。该方法可以包括重新使用保持在存储器中的搜索区域来执行单独目标帧在单独方向上的单独宏块的运动估计。

4. 发明授权

US08213515B2 Interpolated skip mode decision in video compression 有权
标题翻译：视频压缩中插补跳过模式决定
公开(公告)号：US08213515B2
公开(公告)日：2012-07-03
申请号：US12352172
申请日：2009-01-12
申请人： Arun Shankar Kudana , Soyeb N. Nagori , Ajit Venkat Rao , Manoj Koul
发明人： Arun Shankar Kudana , Soyeb N. Nagori , Ajit Venkat Rao , Manoj Koul
IPC分类号： H04N7/12
CPC分类号： H04N19/523 , H04N19/132 , H04N19/147 , H04N19/176 , H04N19/61
摘要： A video encoding method determines the best video encoding mode for a macroblock in the SKIP mode and comparing this cost with other modes. This avoids sub-pixel interpolations for fractional pixels. This models the cost function in a quadratic model and computes the cost for a nearest integer pel and plural adjacent integer pels. This permits determination of the coefficients of the quadratic model. An estimated cost is obtained using the actual fractional pel position in the quadratic model. This can be used for obtaining the cost of a P Skip mode. This can be used for the decision of B direct or B skip modes in B frames.
摘要翻译：视频编码方法确定SKIP模式中宏块的最佳视频编码模式，并将该成本与其他模式进行比较。这样可以避免分数像素的子像素内插。这在二次模型中模拟成本函数，并计算最接近的整数像素和多个相邻整数像素的成本。这允许确定二次模型的系数。使用二次模型中的实际小数像素位置获得估计成本。这可以用于获得P Skip模式的成本。这可以用于B帧中的B直接或B跳过模式的决定。

5. 发明申请

US20090180539A1 Interpolated Skip Mode Decision in Video Compression 有权
标题翻译：视频压缩中的内插跳过模式决策
公开(公告)号：US20090180539A1
公开(公告)日：2009-07-16
申请号：US12352172
申请日：2009-01-12
申请人： Arun Shankar Kudana , Soyeb N. Nagori , Ajit Venkat Rao , Manoj Koul
发明人： Arun Shankar Kudana , Soyeb N. Nagori , Ajit Venkat Rao , Manoj Koul
IPC分类号： H04N7/26 , H04N7/32
CPC分类号： H04N19/523 , H04N19/132 , H04N19/147 , H04N19/176 , H04N19/61
摘要： This invention enables determination of the best video encoding mode for a macroblock in the SKIP mode and comparing this cost with other modes. This invention avoids sub-pixel interpolations for fractional pixels. This invention models the cost function in a quadratic model and computes the cost for a nearest integer pel and plural adjacent integer pels. This permits determination of the coefficients of the quadratic model. An estimated cost is obtained using the actual fractional pel position in the quadratic model. This method can be used for obtaining the cost of a P Skip mode. This method can be used for the decision of B direct or B skip modes in B frames.
摘要翻译：本发明能够确定SKIP模式中的宏块的最佳视频编码模式，并将该成本与其他模式进行比较。本发明避免了对于小数像素的子像素插值。本发明对二次模型中的成本函数进行建模，并计算最近整数像素和多个相邻整数像素的成本。这允许确定二次模型的系数。使用二次模型中的实际小数像素位置获得估计成本。该方法可用于获得P Skip模式的成本。该方法可用于B帧中B直接或B跳模式的决定。

6. 发明授权

US08443275B2 Lossy compression technique for video encoder bandwidth reduction using compression error data 有权
标题翻译：使用压缩误差数据的视频编码器带宽降低的有损压缩技术
公开(公告)号：US08443275B2
公开(公告)日：2013-05-14
申请号：US12211830
申请日：2008-09-17
申请人： Ajit Deepak Gupte , Mahesh Madhukar Mehendale , Hetul Sanghvi , Ajit Venkat Rao
发明人： Ajit Deepak Gupte , Mahesh Madhukar Mehendale , Hetul Sanghvi , Ajit Venkat Rao
IPC分类号： G06F7/02
CPC分类号： H04N19/00763 , H04N19/428 , H04N19/433 , H04N19/593 , H04N19/61
摘要： A method, system and apparatus of lossy compression technique for video encoder bandwidth reduction using compression error data are disclosed. In one embodiment, a method includes storing an error data from a compression of an original reference data in an off-chip memory, accessing the error data during a motion compensation operation, and performing the motion compensation operation by applying the error data through an algorithm (e.g., determined by the method of storing the error data). The method may include generating a predicted frame in the motion compensation operation using a motion vector and an on-chip video data. In addition, the method may include determining the error data as a difference between a compressed reference data (e.g., is created by compressing the original reference data) and an original reference data (e.g., reconstructed from a prior predicted frame and a decompressed encoder data).
摘要翻译：公开了使用压缩误差数据的视频编码器带宽减小的有损压缩技术的方法，系统和装置。在一个实施例中，一种方法包括将来自原始参考数据的压缩的错误数据存储在片外存储器中，在运动补偿操作期间访问错误数据，以及通过算法应用错误数据来执行运动补偿操作（例如，通过存储错误数据的方法确定）。该方法可以包括使用运动矢量和片上视频数据在运动补偿操作中生成预测帧。此外，该方法可以包括将误差数据确定为压缩参考数据（例如，通过压缩原始参考数据产生）与原始参考数据之间的差异（例如，从先前预测帧和解压缩编码器数据重建）。

7. 发明申请

US20090183059A1 LOSSY COMPRESSION TECHNIQUE FOR VIDEO ENCODER BANDWIDTH REDUCTION USING COMPRESSION ERROR DATA 有权
标题翻译：使用压缩错误数据进行视频编码器带宽减少的损耗压缩技术
公开(公告)号：US20090183059A1
公开(公告)日：2009-07-16
申请号：US12211830
申请日：2008-09-17
申请人： Ajit Deepak Gupte , Mahesh Madhukar Mehendale , Hetul Sanghvi , Ajit Venkat Rao
发明人： Ajit Deepak Gupte , Mahesh Madhukar Mehendale , Hetul Sanghvi , Ajit Venkat Rao
IPC分类号： G06F11/07
CPC分类号： H04N19/00763 , H04N19/428 , H04N19/433 , H04N19/593 , H04N19/61
摘要： A method, system and apparatus of lossy compression technique for video encoder bandwidth reduction using compression error data are disclosed. In one embodiment, a method includes storing an error data from a compression of an original reference data in an off-chip memory, accessing the error data during a motion compensation operation, and performing the motion compensation operation by applying the error data through an algorithm (e.g., determined by the method of storing the error data). The method may include generating a predicted frame in the motion compensation operation using a motion vector and an on-chip video data. In addition, the method may include determining the error data as a difference between a compressed reference data (e.g., is created by compressing the original reference data) and an original reference data (e.g., reconstructed from a prior predicted frame and a decompressed encoder data).
摘要翻译：公开了使用压缩误差数据的视频编码器带宽减小的有损压缩技术的方法，系统和装置。在一个实施例中，一种方法包括将来自原始参考数据的压缩的错误数据存储在片外存储器中，在运动补偿操作期间访问错误数据，以及通过算法应用错误数据来执行运动补偿操作（例如，通过存储错误数据的方法确定）。该方法可以包括使用运动矢量和片上视频数据在运动补偿操作中生成预测帧。此外，该方法可以包括将误差数据确定为压缩参考数据（例如，通过压缩原始参考数据产生）与原始参考数据之间的差异（例如，从先前预测帧和解压缩编码器数据重建）。

8. 发明授权

US07532672B2 Codecs providing multiple bit streams 有权
标题翻译：编解码器提供多个比特流
公开(公告)号：US07532672B2
公开(公告)日：2009-05-12
申请号：US11308601
申请日：2006-04-11
申请人： Ajit Venkat Rao , Pankaj Rabha
发明人： Ajit Venkat Rao , Pankaj Rabha
IPC分类号： H04L27/00
CPC分类号： G10L19/24 , G10L25/18
摘要： According to an aspect of the present invention two streams data encoding corresponding information contained in a multimedia signal are generated with one bitstream (“first stream”) providing for reproduction of the information with a base quality (e.g., according to a corresponding standard), and the second bitstream (“second stream”) containing information which can be used to further enhance the quality of reproduction.
摘要翻译：根据本发明的一个方面，使用一个比特流（“第一流”）生成用于以基本质量（例如，根据对应的标准）再现信息的两个数据编码对包含在多媒体信号中的对应信息的流数据，和包含可用于进一步增强再现质量的信息的第二比特流（“第二流”）。

9. 发明授权

US08386523B2 Random access audio decoder 有权
标题翻译：随机存取音频解码器
公开(公告)号：US08386523B2
公开(公告)日：2013-02-26
申请号：US11292882
申请日：2005-12-02
申请人： Mihir Narendra Mody , Ashish Jain , Ajit Venkat Rao
发明人： Mihir Narendra Mody , Ashish Jain , Ajit Venkat Rao
IPC分类号： G06F7/00
CPC分类号： G10L19/167
摘要： Random access decoding start points (audio frame headers) for AMR-type files are found by sequential elimination of types of file points from consideration for a block of file points following a random access selected point. Chaining of file points according to frame header format interpretation gives paths of points through the block, and selection of maximal path(s) includes sums of weights of the points of a path. The next-to-initial points of such a maximal path provides a decoding start point.
摘要翻译：通过随机访问选择点之后的文件点块的顺序消除文件点的类型，找到用于AMR型文件的随机存取解码起始点（音频帧头）。根据帧头格式解释的文件点的链接给出通过块的点的路径，并且最大路径的选择包括路径的点的权重的和。这样一个最大路径的下一个初始点提供一个解码起始点。

10. 发明授权

US5890110A Variable dimension vector quantization 失效
标题翻译：可变维矢量量化
公开(公告)号：US5890110A
公开(公告)日：1999-03-30
申请号：US411436
申请日：1995-03-27
申请人： Allen Gersho , Amitava Das , Ajit Venkat Rao
发明人： Allen Gersho , Amitava Das , Ajit Venkat Rao
IPC分类号： G10L19/00 , G10L19/02 , G10L5/06 , H04B1/66
CPC分类号： G10L19/02
摘要： A variable dimension vector quantization method that uses a single "universal" codebook. The method can be given the interpretation of sampling full-dimensioned codevectors in the universal codebook and generating subcodevectors of the same dimension as input data subvector, which dimension may vary in time. A subcodevector is selected from the codebook to have minimum distortion between it and the input data subvector. The subcodevector with minimum distortion corresponds to the representative, full-dimensioned codevector in the codebook. The codebook is designed by inverse sampling of training subvectors to obtain full-dimension vectors, then iteratively clustering the training set until a stable centroid vector is obtained.
摘要翻译：使用单个“通用”码本的可变维度向量量化方法。该方法可以给出通用码本中采样全尺寸代码矢量的解释，并生成与输入数据子向量相同维度的子代码矢量，该维度可能随时间变化。从码本中选择一个子代码向量，使其与输入数据子向量之间具有最小的失真。具有最小失真的子码矢量对应于码本中的代表性的，全尺寸的码矢量。该码本是通过对训练子向量进行逆采样来设计的，以获得全维向量，然后迭代地聚类训练集，直到获得稳定的质心向量。

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