公开(公告)号：US10390024B2

公开(公告)日：2019-08-20

申请号：US14760457

申请日：2014-04-08

申请人： SONY CORPORATION ,  Cheung Auyeung ,  Jun Xu ,  Ohji Nakagami ,  Ali Tabatabai

发明人： Cheung Auyeung ,  Jun Xu ,  Ohji Nakagami ,  Ali Tabatabai

IPC分类号： H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/167 ,  H04N19/187 ,  H04N19/36 ,  H04N19/70 ,  H04N19/115 ,  H04N19/463 ,  H04N19/174 ,  H04N19/33

摘要： Region of Interest (ROI) scalability with SHVC is able to be implemented where scalability is used for part of a picture but not the whole picture. Applications of ROI scalability include traffic monitoring, security monitoring and tiled streaming.

公开(公告)号：US20120230402A1

公开(公告)日：2012-09-13

申请号：US13415554

申请日：2012-03-08

申请人： Cheung Auyeung ,  Wei Liu

发明人： Cheung Auyeung ,  Wei Liu

IPC分类号： H04N7/32

CPC分类号： H04N19/00121 ,  H04N19/13 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

摘要： A context reduced last transform (CRLT) coding technique which enhances parallel context processing, such as utilized in JCTVC-D262, to reduce complexity by reducing the number of context models using for coding the position of the last significant transform coefficient. Selected context models are removed and additional bins are shared which reduce the number of contexts required. In one benchmark test for YUV 4:2:0 video, the number of context models were reduced from 120 for the proposed entropy encoding of JCTVC-D262 test model HM 2.0, versus 82 context models required for CRLT coding.

摘要翻译： 上下文减少最后变换（CRLT）编码技术，其增强了诸如JCTVC-D262中使用的并行上下文处理，以通过减少用于对最后一个有效变换系数的位置进行编码的上下文模型的数量来降低复杂度。 删除所选的上下文模型，并共享额外的数据仓库，从而减少所需的上下文数量。 在YUV 4：2：0视频的一个基准测试中，对于JCTVC-D262测试模型HM 2.0的所提出的熵编码，上下文模型的数量从120减少到CRLT编码所需的82个上下文模型。

公开(公告)号：US20090257488A1

公开(公告)日：2009-10-15

申请号：US12103470

申请日：2008-04-15

申请人： Cheung Auyeung

发明人： Cheung Auyeung

IPC分类号： H04N7/26

CPC分类号： H04N19/177 ,  H04N19/102 ,  H04N19/139 ,  H04N19/14 ,  H04N19/149 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/91

摘要： Rate-QP estimation for an I picture is disclosed which involves the steps of: providing an input group of pictures (GOP); selecting an input I picture within the GOP; and outputting, to a computer readable medium, a bit rate corrected Rate-QP, R(QP), for the input I picture. The outputting step may involve calculating intra luma and chroma Rate-QP estimates from corresponding intra luma and chroma histograms; offsetting the intra chroma Rate-QP estimate to form an offset intra chroma estimate; and setting a bit rate corrected Rate-QP for the input I picture to a corrected sum of the previous estimates. The histograms are formed with estimates of intra prediction coefficients, where an intra/non-intra mode is selected that results in a lowest SATD for each macroblock in the GOP. The methods may be implemented into a computer program, possibly resident in an advanced video encoder.

摘要翻译： 公开了一种I图像的速率QP估计，其涉及以下步骤：提供输入图像组（GOP）; 在GOP内选择输入I图像; 并且向计算机可读介质输出用于输入I图像的比特率校正后的速率QP，R（QP）。 输出步骤可以包括从对应的内部亮度和色度直方图计算内部亮度和色度Rate-QP估计; 偏移内部色度Rate-QP估计以形成偏移色差估计; 并且将用于输入I图像的比特率校正的Rate-QP设置为先前估计的校正和。 直方图由内部预测系数的估计形成，其中选择了对GOP中的每个宏块产生最低SATD的帧内/非帧内模式。 这些方法可以被实现到可能驻留在高级视频编码器中的计算机程序中。

公开(公告)号：US20080232459A1

公开(公告)日：2008-09-25

申请号：US11688106

申请日：2007-03-19

申请人： Cheung Auyeung

发明人： Cheung Auyeung

IPC分类号： H04B1/66

CPC分类号： H04N19/177 ,  H04N19/115 ,  H04N19/124 ,  H04N19/147 ,  H04N19/152 ,  H04N19/154 ,  H04N19/172 ,  H04N19/61

摘要： Picture level rate control systems, apparatuses and methods are described which indirectly control bit rate through peak signal to noise ratio (PSNR), thereby providing a stable PSNR while maintaining a given target average bit rate. In a preferred implementation, encoding is performed in conjunction with macroblock QP modulation. In this way, the picture level rate control provides stable temporal quality and the macroblock QP modulation provides stable spatial quality. By way of example, the number of bits generated in a group of pictures (GOP) is controlled by modulating the target bit allocation for a group of pictures (GOP) based on coded picture buffer (CPB) fullness. Macroblocks are encoded for each picture based on a rate-distortion model, which is modified in response to the relative fluctuation of PSNR of pictures within a group of pictures.

摘要翻译： 描述了通过峰值信噪比（PSNR）间接控制比特率的图像比特率控制系统，装置和方法，从而在保持给定的目标平均比特率的同时提供稳定的PSNR。 在优选实现中，结合宏块QP调制执行编码。 以这种方式，图像电平速率控制提供稳定的时间质量，并且宏块QP调制提供稳定的空间质量。 作为示例，通过基于编码图像缓冲器（CPB）饱和度调制用于一组图像（GOP）的目标比特分配来控制在一组图像（GOP）中生成的比特数。 基于速率失真模型对每个图像编码宏块，该模型根据一组图像内的图像的PSNR的相对波动进行修改。

公开(公告)号：US07136541B2

公开(公告)日：2006-11-14

申请号：US10273781

申请日：2002-10-18

申请人： Huipin Zhang ,  Cheung Auyeung ,  Takao Yamazaki

发明人： Huipin Zhang ,  Cheung Auyeung ,  Takao Yamazaki

IPC分类号： G06K9/32

CPC分类号： G06T3/403

摘要： A method of generating a value for a missing pixel “x” by determining a “least harmful” local edge direction between pixels, or sub-pixels, on substantially opposing sides of the missing pixel, and interpolating the difference to arrive at a value for pixel “x”. The method involves generating sub-pixel values for locations within neighboring pixels, the sub-pixels may comprise half-pixels, quarter-pixels, three-quarter pixels, and so forth, wherein any fractional pixel quantity may be created. Absolute difference values are calculated between neighboring pixels, or sub-pixel values, to determine a least harmful local edge direction along which a value is generated for pixel “x” by interpolation.

摘要翻译： 通过在缺失像素的基本相对的侧面上确定像素或子像素之间的“最不利的”局部边缘方向来产生缺失像素“x”的值的方法，并且内插差值以得到 像素“x”。 该方法涉及为相邻像素内的位置生成子像素值，子像素可以包括半像素，四分之一像素，四分之三像素等，其中可以创建任何分数像素数量。 在相邻像素或子像素值之间计算绝对差值，以确定通过插值为像素“x”生成值的最不利的局部边缘方向。

公开(公告)号：US08861599B2

公开(公告)日：2014-10-14

申请号：US13415554

申请日：2012-03-08

申请人： Cheung Auyeung ,  Wei Liu

发明人： Cheung Auyeung ,  Wei Liu

IPC分类号： H04N7/50 ,  H04N19/136 ,  H04N19/176 ,  H04N19/13 ,  H04N19/132

CPC分类号： H04N19/00121 ,  H04N19/13 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

摘要： A context reduced last transform (CRLT) coding technique which enhances parallel context processing, such as utilized in JCTVC-D262, to reduce complexity by reducing the number of context models using for coding the position of the last significant transform coefficient. Selected context models are removed and additional bins are shared which reduce the number of contexts required. In one benchmark test for YUV 4:2:0 video, the number of context models were reduced from 120 for the proposed entropy encoding of JCTVC-D262 test model HM 2.0, versus 82 context models required for CRLT coding.

摘要翻译： 上下文减少最后变换（CRLT）编码技术，其增强了诸如JCTVC-D262中使用的并行上下文处理，以通过减少用于对最后一个有效变换系数的位置进行编码的上下文模型的数量来降低复杂度。 删除所选的上下文模型，并共享额外的数据仓库，从而减少所需的上下文数量。 在YUV 4：2：0视频的一个基准测试中，对于JCTVC-D262测试模型HM 2.0的所提出的熵编码，上下文模型的数量从120减少到CRLT编码所需的82个上下文模型。

公开(公告)号：US08249150B2

公开(公告)日：2012-08-21

申请号：US12344029

申请日：2008-12-24

申请人： Cheung Auyeung

发明人： Cheung Auyeung

IPC分类号： H04N7/12

CPC分类号： H04N19/124 ,  H04N19/436 ,  H04N19/61

摘要： A method and apparatus for performing quantization during video compression, such as within an MPEG-2 encoder. Inter-quantization is particularly described, although the teachings may be applied to intra-quantization as well. Computationally intensive portions of the quantization process are split into multiple components in response to differing execution probability. A first component is executed within each quantization iteration, and preferably is performed in parallel, such as using SIMD processing. At least one additional component, such as a second component, is serially processed in response to detecting a condition that does not arise with each loop iteration. One configuration replaces division operations with a combination of multiply and shift operations, while making extended use of table lookup procedures to reduce processing overhead.

摘要翻译： 一种用于在视频压缩期间执行量化的方法和装置，例如在MPEG-2编码器内。 特别描述了互量化，尽管也可以将教导应用于量化内。 响应于不同的执行概率，量化处理的计算密集部分被分成多个分量。 在每个量化迭代中执行第一分量，并且优选地并行地执行，例如使用SIMD处理。 响应于检测到每个循环迭代不产生的条件，至少一个附加组件，例如第二组件被连续处理。 一个配置通过乘法和移位操作的组合替代了划分操作，同时扩展了使用表查找过程来减少处理开销。

公开(公告)号：US20120183236A1

公开(公告)日：2012-07-19

申请号：US13349267

申请日：2012-01-12

申请人： Cheung Auyeung ,  Wei Liu

发明人： Cheung Auyeung ,  Wei Liu

IPC分类号： G06K9/36

CPC分类号： H04N19/18 ,  H04N19/129 ,  H04N19/13

摘要： A fast implementation context selection of a significance map includes caching the significance of each coefficient in a buffer, storing an extended significance map in an extended buffer and updating the extended significance map after the significance of a transform coefficient is determined by the encoder or the decoder.

摘要翻译： 重要性映射的快速实现上下文选择包括将缓冲器中的每个系数的重要性缓存，将扩展的有效映射存储在扩展缓冲器中，并且在由编码器或解码器确定变换系数的重要性之后更新扩展的有效映射 。

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。

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。