专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5852473A 3-2 pulldown detector 失效
标题翻译： 3-2下拉探测器
公开(公告)号：US5852473A
公开(公告)日：1998-12-22
申请号：US603302
申请日：1996-02-20
申请人： Caspar Horne , Ali Tabatabai
发明人： Caspar Horne , Ali Tabatabai
IPC分类号： H04N7/01 , H04N7/26 , H04N5/46
CPC分类号： H04N7/0112 , H04N19/139 , H04N19/142 , H04N19/179 , H04N19/87 , Y10S348/911
摘要： A 3-2 pulldown detector for a video compression encoder initially converts each frame of an input video signal that includes converted film material as well as original video material into top and bottom fields. Consecutive fields from the top and bottom fields are then input to respective sum of absolute difference circuits, the outputs of which are subtracted from each other to produce a difference signal. The difference signal is processed to remove spikes that represent scene changes and to generate a flag signal during the periods of the input video signal when the converted film material is present. The flag signal is then used by a frame rate reduction circuit to eliminate the repeated fields in the converted film material prior to input to a video encoder that outputs a compressed video signal.
摘要翻译：用于视频压缩编码器的3-2下拉检测器首先将包括转换的胶片材料以及原始视频材料的输入视频信号的每一帧转换成顶部和底部场。然后将来自顶部和底部场的连续场输入到相应的绝对差分电路之和，并将其输出相互相减以产生差分信号。处理差分信号以去除表示场景变化的尖峰，并且当转换的胶片材料存在时在输入视频信号的周期期间产生标志信号。然后，标记信号由帧速率降低电路使用，以在输入到输出压缩视频信号的视频编码器之前消除转换的胶片材料中的重复场。

2. 发明授权

US10057577B2 Pre-charge phase data compression 有权
公开(公告)号：US10057577B2
公开(公告)日：2018-08-21
申请号：US14736597
申请日：2015-06-11
申请人： Hye-Yeon Cheong , Ali Tabatabai
发明人： Hye-Yeon Cheong , Ali Tabatabai
IPC分类号： G06T9/00 , H04N19/124 , H04N19/13 , H04N19/136 , H04N19/184 , H04N19/192 , H04N19/176 , H04N19/593 , H04N19/146
CPC分类号： H04N19/124 , H04N19/13 , H04N19/136 , H04N19/146 , H04N19/176 , H04N19/184 , H04N19/192 , H04N19/593
摘要： Implementations generally relate to pre-charge phase data compression. In some implementations, a method includes computing prediction values for image data, where the image data is pre-charge phase data. The method also includes computing residual data based on the prediction values. The method also includes quantizing the residual data. The method also includes entropy encoding the quantized residual data. The method also includes refining an inverse quantized residual data based on one or more of the residual data and a number of left-over bit-budget after entropy encoding.

3. 发明授权

US08908755B2 Multi-parameter motion for efficient prediction in video compression 有权
标题翻译：多参数运动用于视频压缩中的高效预测
公开(公告)号：US08908755B2
公开(公告)日：2014-12-09
申请号：US13176124
申请日：2011-07-05
申请人： Ehsan Maani , Wei Liu , Ali Tabatabai
发明人： Ehsan Maani , Wei Liu , Ali Tabatabai
IPC分类号： H04N7/12 , H04N19/51 , H04N19/46 , H04N7/50
CPC分类号： H04N19/52 , H04N19/46 , H04N19/547 , H04N19/56 , H04N19/70
摘要： Motion Compensated Prediction (MCP) has been a key factor in most advanced video compression schemes. For further reduction in the residual signal energy in B-frames, bidirectional prediction where two motion-compensated signals are superimposed has also been utilized in most prior video coding standards such as MPEG-2 or MPEG-4/AVC. Syntax changes and appropriate motion vector prediction that allows efficient use of multi-parameter MCP is described. The prediction signal is constructed by linearly combining the motion-compensated signals from each parameter (or motion vector).
摘要翻译：运动补偿预测（MCP）一直是大多数高级视频压缩方案的关键因素。为了进一步降低B帧中的残留信号能量，在大多数先前的视频编码标准（例如MPEG-2或MPEG-4 / AVC）中也已经使用了叠加两个运动补偿信号的双向预测。描述了允许有效使用多参数MCP的语法改变和适当的运动矢量预测。通过线性组合来自每个参数（或运动矢量）的运动补偿信号来构造预测信号。

4. 发明授权

US08792549B2 Decoder-derived geometric transformations for motion compensated inter prediction 有权
标题翻译：用于运动补偿帧间预测的解码器导出的几何变换
公开(公告)号：US08792549B2
公开(公告)日：2014-07-29
申请号：US13037054
申请日：2011-02-28
申请人： Wei Liu , Mohammad Gharavi-Alkhansari , Ehsan Maani , Ali Tabatabai
发明人： Wei Liu , Mohammad Gharavi-Alkhansari , Ehsan Maani , Ali Tabatabai
IPC分类号： H04N7/12 , H04N11/04 , H04N11/02
CPC分类号： H04N19/395 , H04N19/103 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/51 , H04N19/513
摘要： A method of estimating motion by estimating motion parameters of a complex motion model using reconstructed neighboring pixels of the current block and then applying the estimated motion parameters to the coordinates of the current block to determine motion compensated in a corresponding reference block. The parameters are not transmitted to a decoder and are derived at the decoder side. The encoder only sends a 1-bit control-flag to indicate whether the derived parameters should be used.
摘要翻译：通过使用当前块的重建相邻像素估计复运动模型的运动参数，然后将所估计的运动参数应用于当前块的坐标以确定在相应参考块中补偿的运动来估计运动的方法。这些参数不被传送到解码器，并且在解码器侧导出。编码器只发送一个1位控制标志来指示是否应该使用派生参数。

5. 发明授权

US08787449B2 Optimal separable adaptive loop filter 有权
标题翻译：最优可分离自适应环路滤波器
公开(公告)号：US08787449B2
公开(公告)日：2014-07-22
申请号：US13071258
申请日：2011-03-24
申请人： Cheung Ayeung , Ali Tabatabai , Minh Do
发明人： Cheung Ayeung , Ali Tabatabai , Minh Do
IPC分类号： H04B1/66 , H04N7/26
CPC分类号： H04N7/26978 , H04N19/117 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/192 , H04N19/82 , H04N19/96
摘要： An adaptive loop filter utilizing separable filters within a quadtree-based adaptive loop filter (QALF). The filters for at least the P and B pictures are replaced with a separable filter to provide Separable QALF (SQALF). In a preferred embodiment the filter comprises a Wiener filter as a best fit approximation of the non-separable filter. In response to decoding with the SQALF approach, computational complexity in the decoder is reduced without lowering perceived visual quality. Estimation of the separable filter is obtained in the encoder by iteratively minimizing the sum of squares error with the separable filter. The SQALF filtering is described within a video decoder.
摘要翻译：一种利用基于四叉树的自适应环路滤波器（QALF）中的可分离滤波器的自适应环路滤波器。用于至少P和B图像的滤波器被替换为可分离滤波器以提供可分离的QALF（SQALF）。在优选实施例中，滤波器包括作为不可分离滤波器的最佳拟合近似的维纳滤波器。响应于使用SQALF方法的解码，解码器中的计算复杂度降低而不降低感知的视觉质量。通过迭代地使可分离滤波器的平方和误差最小化，可以在编码器中获得可分离滤波器的估计。在视频解码器中描述了SQALF滤波。

6. 发明授权

US08787444B2 Differential coding of intra directions (DCIC) 失效
标题翻译：内部差分编码（DCIC）
公开(公告)号：US08787444B2
公开(公告)日：2014-07-22
申请号：US13176132
申请日：2011-07-05
申请人： Ehsan Maani , Wei Liu , Ali Tabatabai
发明人： Ehsan Maani , Wei Liu , Ali Tabatabai
IPC分类号： H04N7/32 , H04N7/34 , H04N7/26
CPC分类号： H04N19/00551 , H04N19/463 , H04N19/593
摘要： Spatial domain directional intra prediction has been shown to be very effective to remove the correlation between the pixels in the current block and reconstructed neighbors. In AVC, 8 directional prediction modes (plus the DC prediction mode) are defined. The prediction mode number is signaled to the decoder using a simple predictive coding method. The previous intra prediction methods have two major disadvantages: lack of precision for arbitrary directional patterns and accuracy lack of accuracy to exploit geometric dependency between blocks. To address these issues, a new method accurately predicts the intra directions from reconstructed neighboring pixels and differentially encode the intra directions. This allows a more precise directional prediction without the significant increase in the cost for transmitting the side information.
摘要翻译：已经显示空间域定向帧内预测对于去除当前块中的像素与重建的邻居之间的相关性非常有效。在AVC中，定义了8种方向预测模式（加上DC预测模式）。使用简单的预测编码方法将预测模式信号发送给解码器。以前的帧内预测方法有两个主要缺点：对于任意方向模式缺乏精度，精度缺乏利用块之间的几何依赖关系。为了解决这些问题，一种新的方法准确地预测重建的相邻像素的帧内方向，并对帧内方向进行差分编码。这允许更精确的方向预测，而不会显着增加用于发送侧信息的成本。

7. 发明申请

US20120044988A1 FAST ALGORITHM ADAPTIVE INTERPOLATION FILTER (AIF) 审中-公开
标题翻译：快速算法自适应滤波器（AIF）
公开(公告)号：US20120044988A1
公开(公告)日：2012-02-23
申请号：US12859070
申请日：2010-08-18
申请人： Cheung Auyeung , Ali Tabatabai
发明人： Cheung Auyeung , Ali Tabatabai
IPC分类号： H04N7/12
CPC分类号： H04N19/523 , H04N19/117 , H04N19/147 , H04N19/176 , H04N19/194 , H04N19/61
摘要： An apparatus and method are taught for estimating an optimized sub-pixel interpolation filter using iterative and non-iterative estimations as needed for sub-pixel motion compensation and motion estimation in a video codec for improving coding efficiency. Motion vector information and mode decisions are passed from the first encoding stage which uses predetermined interpolation to at least a second encoding stage which uses an estimated adaptive interpolation filter determined during the first encoding stage. Processing overhead is reduced within the subsequent stages. Embodiments are described in which additional stages perform iterative encoding and estimation of interpolation filter in an n-th iteration.
摘要翻译：教导了一种装置和方法，用于根据视频编解码器中的子像素运动补偿和运动估计所需的迭代和非迭代估计来估计优化的子像素内插滤波器，以提高编码效率。运动矢量信息和模式决定从使用预定插值的第一编码级传递到使用在第一编码阶段期间确定的估计自适应内插滤波器的至少第二编码级。处理开销在后续阶段减少。描述了其中附加级在第n次迭代中执行内插滤波器的迭代编码和估计的实施例。

8. 发明申请

US20120014443A1 DIFFERENTIAL CODING OF INTRA DIRECTIONS (DCIC) 失效
标题翻译：内部方向的差分编码（DCIC）
公开(公告)号：US20120014443A1
公开(公告)日：2012-01-19
申请号：US13176132
申请日：2011-07-05
申请人： Ehsan Maani , Wei Liu , Ali Tabatabai
发明人： Ehsan Maani , Wei Liu , Ali Tabatabai
IPC分类号： H04N7/32
CPC分类号： H04N19/00551 , H04N19/463 , H04N19/593
摘要： Spatial domain directional intra prediction has been shown to be very effective to remove the correlation between the pixels in the current block and reconstructed neighbors. In AVC, 8 directional prediction modes (plus the DC prediction mode) are defined. The prediction mode number is signaled to the decoder using a simple predictive coding method. The previous intra prediction methods have two major disadvantages: lack of precision for arbitrary directional patterns and accuracy lack of accuracy to exploit geometric dependency between blocks. To address these issues, a new method accurately predicts the intra directions from reconstructed neighboring pixels and differentially encode the intra directions. This allows a more precise directional prediction without the significant increase in the cost for transmitting the side information.
摘要翻译：已经显示空间域定向帧内预测对于去除当前块中的像素与重建的邻居之间的相关性非常有效。在AVC中，定义了8种方向预测模式（加上DC预测模式）。使用简单的预测编码方法将预测模式信号发送给解码器。以前的帧内预测方法有两个主要缺点：对于任意方向模式缺乏精度，精度缺乏利用块之间的几何依赖关系。为了解决这些问题，一种新的方法准确地预测重建的相邻像素的帧内方向，并对帧内方向进行差分编码。这允许更精确的方向预测，而不会显着增加用于发送侧信息的成本。

9. 发明申请

US20110305276A1 ITERATIVE COMPUTATION OF ADAPTIVE INTERPOLATION FILTER 失效
标题翻译：自适应插值滤波器的迭代计算
公开(公告)号：US20110305276A1
公开(公告)日：2011-12-15
申请号：US12797873
申请日：2010-06-10
申请人： Cheung Auyeung , Ali Tabatabai
发明人： Cheung Auyeung , Ali Tabatabai
IPC分类号： H04N11/02
CPC分类号： H04N19/523 , H04N19/117 , H04N19/172 , H04N19/192
摘要： The invention is an apparatus and method for estimating an optimized sub-pixel interpolation filter using iterative estimations as needed for sub-pixel motion compensation and motion estimation in a video codec for improving coding efficiency. Multiple iterations of adaptive interpolation filter estimation are performed including more than one iteration based on sub-pixel motion vectors. During testing of the inventive apparatus and method on various video segments, average bit rate reductions were exhibited of approximately 5%.
摘要翻译：本发明是一种用于根据视频编解码器中的子像素运动补偿和运动估计所需的迭代估计来估计优化的子像素内插滤波器的装置和方法，用于提高编码效率。执行自适应内插滤波估计的多次迭代，其包括基于子像素运动矢量的多次迭代。在针对各种视频片段的本发明装置和方法的测试期间，显示出大约5％的平均比特率降低。

10. 发明申请

US20110249725A1 OPTIMAL SEPARABLE ADAPTIVE LOOP FILTER 有权
标题翻译：最佳分离自适应滤波器
公开(公告)号：US20110249725A1
公开(公告)日：2011-10-13
申请号：US13071258
申请日：2011-03-24
申请人： Cheung Auyeung , Ali Tabatabai , Minh Do
发明人： Cheung Auyeung , Ali Tabatabai , Minh Do
IPC分类号： H04N7/26
CPC分类号： H04N7/26978 , H04N19/117 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/192 , H04N19/82 , H04N19/96
摘要： An adaptive loop filter utilizing separable filters within a quadtree-based adaptive loop filter (QALF). The filters for at least the P and B pictures are replaced with a separable filter to provide Separable QALF (SQALF). In a preferred embodiment the filter comprises a Wiener filter as a best fit approximation of the non-separable filter. In response to decoding with the SQALF approach, computational complexity in the decoder is reduced without lowering perceived visual quality. Estimation of the separable filter is obtained in the encoder by iteratively minimizing the sum of squares error with the separable filter. The SQALF filtering is described within a video decoder.
摘要翻译：一种利用基于四叉树的自适应环路滤波器（QALF）中的可分离滤波器的自适应环路滤波器。用于至少P和B图像的滤波器被替换为可分离滤波器以提供可分离的QALF（SQALF）。在优选实施例中，滤波器包括作为不可分离滤波器的最佳拟合近似的维纳滤波器。响应于使用SQALF方法的解码，解码器中的计算复杂度降低而不降低感知的视觉质量。通过迭代地使可分离滤波器的平方和误差最小化，可以在编码器中获得可分离滤波器的估计。在视频解码器中描述了SQALF滤波。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式