公开(公告)号：US08170356B2

公开(公告)日：2012-05-01

申请号：US12060887

申请日：2008-04-02

申请人： Manu Mathew ,  Soyeb Nagori ,  Pramod Kumar Swami

发明人： Manu Mathew ,  Soyeb Nagori ,  Pramod Kumar Swami

IPC分类号： G06K9/36

CPC分类号： H04N19/31 ,  H04N19/107 ,  H04N19/114 ,  H04N19/124 ,  H04N19/139 ,  H04N19/142 ,  H04N19/159 ,  H04N19/164 ,  H04N19/172 ,  H04N19/177 ,  H04N19/56 ,  H04N19/61

摘要： The method, system, and apparatus of linear temporal reference scheme having non-reference predictive frames is disclosed. In one embodiment, a method of a temporal reference scheme includes creating a non-reference predictive frame and a reference predictive frame from a reference frame, increasing a quantization factor of the non-reference predictive frame by a threshold value, and decreasing the quantization factor of the reference predictive frame by the threshold value. The method may include toggling between the temporal reference scheme and another temporal reference scheme in which there may be no non-reference predictive frames and only reference predictive frames based on a scenario. The method may also include calculating a target bit rate across a communication channel through a bit rate calculation algorithm that considers a bandwidth capacity across the communication channel.

摘要翻译： 公开了具有非参考预测帧的线性时间参考方案的方法，系统和装置。 在一个实施例中，时间参考方案的方法包括从参考帧创建非参考预测帧和参考预测帧，将非参考预测帧的量化因子增加阈值，并且减小量化因子 的参考预测帧的阈值。 该方法可以包括在时间参考方案和另一个时间参考方案之间切换，其中可以不存在基于场景的非参考预测帧和仅参考预测帧。 该方法还可以包括通过考虑跨通信信道的带宽容量的比特率计算算法来计算跨通信信道的目标比特率。

公开(公告)号：US20100315557A1

公开(公告)日：2010-12-16

申请号：US12794942

申请日：2010-06-07

申请人： Manu Mathew ,  Soyeb Nagori ,  Akira Osamoto

发明人： Manu Mathew ,  Soyeb Nagori ,  Akira Osamoto

IPC分类号： H04N5/00

CPC分类号： H04N19/198 ,  H04N19/126 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/61

摘要： Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.

摘要翻译： 视频流的图像帧被编码，目的是在显示时减少视频流中的闪烁。 在一个实施例中，用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中，用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中，如果图像帧被认为包含高活动性，则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中，在被编码之前，源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。

公开(公告)号：US09152875B2

公开(公告)日：2015-10-06

申请号：US12777433

申请日：2010-05-11

申请人： Manu Mathew ,  Soyeb Nagori

发明人： Manu Mathew ,  Soyeb Nagori

IPC分类号： G06K9/32 ,  H04N19/149 ,  H04N19/61 ,  H04N19/124 ,  H04N19/14 ,  H04N19/152

CPC分类号： G06K9/3266 ,  H04N19/124 ,  H04N19/14 ,  H04N19/149 ,  H04N19/152 ,  H04N19/61

摘要： A video encoder receives a macro-block of an image frame, and determines whether the macro-block contains text. The video encoder computes a quantization parameter for quantizing the macro-block, with the quantization parameter computed to be smaller if the macro-block is determined to contain text. The video encoder encodes the macro-block using the quantization parameter. Text quality in the encoded macro-block is preserved.

摘要翻译： 视频编码器接收图像帧的宏块，并且确定宏块是否包含文本。 视频编码器计算用于量化宏块的量化参数，如果宏块被确定为包含文本，则计算的量化参数更小。 视频编码器使用量化参数对宏块进行编码。 编码宏块中的文本质量得以保留。

公开(公告)号：US08675737B2

公开(公告)日：2014-03-18

申请号：US12899897

申请日：2010-10-07

申请人： Soyeb Nagori

发明人： Soyeb Nagori

IPC分类号： H04B1/66

CPC分类号： H04N19/51 ,  H04N5/145 ,  H04N19/176 ,  H04N19/433 ,  H04N19/523 ,  H04N19/61

摘要： A method and apparatus for predicting reference data transfer scheme for motion estimation. The method includes computing, via the processor, hypothetical rectangle region in reference frame containing all the predicting and reference data for doing motion estimation search around the region, if the macroblock is not the first in a row, utilizing overlap with previously fetched reference data, computing overlap with previously fetched reference data, and transferring needed data, invalidating any predictor, wherein the predictor is not part of the fetched data, and regulating the motion estimation and setting the motion vector to an effective value based on the fetched and computed data.

摘要翻译： 一种用于预测用于运动估计的参考数据传输方案的方法和装置。 该方法包括：通过处理器计算包含所有预测和参考数据的参考帧中的假想矩形区域，用于在该区域周围进行运动估计搜索，如果宏块不是第一行，利用与先前获取的参考数据的重叠， 计算与先前获取的参考数据的重叠，以及传送所需数据，使任何预测器无效，其中预测器不是所获取的数据的一部分，并且基于获取和计算的数据来调节运动估计并将运动矢量设置为有效值。

公开(公告)号：US08582645B2

公开(公告)日：2013-11-12

申请号：US12794942

申请日：2010-06-07

申请人： Manu Mathew ,  Soyeb Nagori ,  Akira Osamoto

发明人： Manu Mathew ,  Soyeb Nagori ,  Akira Osamoto

IPC分类号： H04N5/00

CPC分类号： H04N19/198 ,  H04N19/126 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/196 ,  H04N19/61

摘要： Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.

摘要翻译： 视频流的图像帧被编码，目的是在显示时减少视频流中的闪烁。 在一个实施例中，用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中，用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中，如果图像帧被认为包含高活动性，则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中，在被编码之前，源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。

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。

公开(公告)号：US20110103481A1

公开(公告)日：2011-05-05

申请号：US12899897

申请日：2010-10-07

申请人： Soyeb Nagori

发明人： Soyeb Nagori

IPC分类号： H04N11/02

CPC分类号： H04N19/51 ,  H04N5/145 ,  H04N19/176 ,  H04N19/433 ,  H04N19/523 ,  H04N19/61

摘要： A method and apparatus for predicting reference data transfer scheme for motion estimation. The method includes computing, via the processor, hypothetical rectangle region in reference frame containing all the predicting and reference data for doing motion estimation search around the region, if the macroblock is not the first in a row, utilizing overlap with previously fetched reference data, computing overlap with previously fetched reference data, and transferring needed data, invalidating any predictor, wherein the predictor is not part of the fetched data, and regulating the motion estimation and setting the motion vector to an effective value based on the fetched and computed data.

摘要翻译： 一种用于预测用于运动估计的参考数据传输方案的方法和装置。 该方法包括：通过处理器计算包含所有预测和参考数据的参考帧中的假想矩形区域，用于在该区域周围进行运动估计搜索，如果宏块不是第一行，利用与先前获取的参考数据的重叠， 计算与先前获取的参考数据的重叠，以及传送所需数据，使任何预测器无效，其中预测器不是所获取的数据的一部分，并且基于获取和计算的数据来调节运动估计并将运动矢量设置为有效值。

公开(公告)号：US09788010B2

公开(公告)日：2017-10-10

申请号：US12773145

申请日：2010-05-04

申请人： Soyeb Nagori ,  Arun Shankar Kudana ,  Pramod Kumar Swami

发明人： Soyeb Nagori ,  Arun Shankar Kudana ,  Pramod Kumar Swami

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/523 ,  H04N19/105 ,  H04N19/176 ,  H04N19/147 ,  H04N19/172 ,  H04N19/61 ,  H04N19/109 ,  H04N19/114 ,  H04N19/117 ,  H04N19/156 ,  H04N19/157

CPC分类号： H04N19/523 ,  H04N19/105 ,  H04N19/109 ,  H04N19/114 ,  H04N19/117 ,  H04N19/147 ,  H04N19/156 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/61

摘要： Several techniques aimed at reducing computational complexity when encoding uses bi-predictively encoded frames (B-frames) are implemented in a video encoder. In an embodiment, B-frames are not used as reference frames for encoding P-frames and other B-frames. Non-use of B-frames allows a de-blocking filter used in the video encoder to be switched off when reconstructing encoded B-frames, and use of a lower complexity filter for fractional-resolution motion search for B-frames. In another embodiment, cost functions used in motion estimation for B-frames are simplified to reduce computational complexity. In one more embodiment, fractional pixel refinement in motion search for B-frames is simplified. In yet another embodiment, predictors used in motion estimation for a macro-block in a P-frame are selected from a B-frame that uses a same reference frame as the P-frame.

公开(公告)号：US20130202036A1

公开(公告)日：2013-08-08

申请号：US12751211

申请日：2010-03-31

申请人： Soyeb Nagori ,  Manu Mathew ,  Pramod Kumar Swami

发明人： Soyeb Nagori ,  Manu Mathew ,  Pramod Kumar Swami

IPC分类号： H04N7/26

CPC分类号： H04N19/107 ,  H04N19/147 ,  H04N19/176 ,  H04N19/50

摘要： This invention predicts that intra mode prediction is more effective for the macroblocks where motion estimation in inter mode prediction fails. This failure is indicated by a large value of the inter mode SAD. This invention performs intra mode prediction for only macro blocks have larger inter mode SADs. The definition of a large inter mode SAD differs for different content. This invention compares the inter mode SAD of a current macroblock with an adaptive threshold. This adaptive threshold depends on the average and variance of the SADs of the previous predicted frame. An adaptive threshold is calculated for each new predictive frame.

摘要翻译： 本发明预测帧模式预测对于帧间模式预测中的运动估计失败的宏块更有效。 该故障由间隔模式SAD的大值指示。 本发明仅对具有较大的帧间模式SAD的宏块执行帧内模式预测。 大型inter模式SAD的定义因不同内容而异。 本发明将当前宏块的帧间模式SAD与自适应阈值进行比较。 该自适应阈值取决于先前预测帧的SAD的平均值和方差。 为每个新的预测帧计算自适应阈值。

公开(公告)号：US08031946B2

公开(公告)日：2011-10-04

申请号：US12056331

申请日：2008-03-27

申请人： Soyeb Nagori

发明人： Soyeb Nagori

IPC分类号： G06K9/48

CPC分类号： G06K9/6282 ,  H04N19/11 ,  H04N19/119 ,  H04N19/14 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

摘要： The method, system, and apparatus of source statistics based intra prediction type is disclosed. In one embodiment, a method includes classifying a four-pixel square block in an edge class (e.g., may include a DC edge class, a vertical edge class, a horizontal edge class, a diagonal edge class, and/or a planar edge class) based on an edge classifier, classifying an eight-pixel square block having the four-pixel square block and other four-pixel square blocks as a homogenous class if the four-pixel square block and the other four-pixel square blocks of the eight-pixel square block belong to the edge class, assigning a direction to the edge class of the eight-pixel square block, and determining an optimal intra-prediction type through the classification such that empirical testing of all possible ones of the edge class and the direction is avoided when the homogenous class is identified.

摘要翻译： 公开了基于源统计的帧内预测类型的方法，系统和装置。 在一个实施例中，一种方法包括对边缘类中的四像素平方块进行分类（例如，可以包括DC边缘类，垂直边缘类，水平边缘类，对角边缘类和/或平面边缘类 ）基于边缘分类器，如果八像素的四像素方块和四像素平方块的四像素平方块和四像素平方块的四像素平方块 像素平方块属于边缘类，向八像素平方块的边缘类分配方向，并且通过分类确定最佳帧内预测类型，使得对边缘类和所有边缘类的所有可能的经验检验 当确定同质类时，避免了方向。