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1. 发明申请

US20130329799A1 PREDICTIVE VIDEO CODER WITH LOW POWER REFERENCE PICTURE TRANSFORMATION 有权
标题翻译：具有低功率参考图像转换的预测视频编码器
公开(公告)号：US20130329799A1
公开(公告)日：2013-12-12
申请号：US13755928
申请日：2013-01-31
申请人： Yao-Chung Lin , Xiaosong Zhou , Hsi-Jung Wu , Douglas Scott Price , Chris Y. Chung , Dazhong Zhang
发明人： Yao-Chung Lin , Xiaosong Zhou , Hsi-Jung Wu , Douglas Scott Price , Chris Y. Chung , Dazhong Zhang
IPC分类号： H04N7/26
CPC分类号： H04N19/51 , H04N19/503
摘要： Video coders may perform perspective transformation of reference frames during coding in a manner that conserves processing resources. When a new input frame is available for coding, a camera position for the input frame may be estimated. A video coder may search for reference pictures having similar camera positions as the position of the input frame and, for each reference picture identified, the video coder may perform a prediction search to identify a reference picture that is the best prediction match for the input frame. Once the video coder identifies a reference picture to serve as a prediction source for the input frame, the video coder may derive a transform to match the reference frame data to the input frame data and may transform the reference picture accordingly. The video coder may code the input frame using the transformed reference picture as a prediction reference and may transmit coded frame data and the camera position of the input frame to a decoder. Thus, the video coder may perform derivation and execution of transforms on a limited basis which conserves system resources.
摘要翻译：视频编码器可以在编码期间以保存处理资源的方式执行参考帧的透视变换。当新的输入帧可用于编码时，可以估计用于输入帧的摄像机位置。视频编码器可以搜索具有与输入帧的位置相似的相机位置的参考图像，并且对于识别的每个参考图像，视频编码器可以执行预测搜索以识别作为输入帧的最佳预测匹配的参考图像。一旦视频编码器识别用作输入帧的预测源的参考图像，则视频编码器可以导出将参考帧数据与输入帧数据相匹配的变换，并且可以相应地变换参考图像。视频编码器可以使用变换的参考图片作为预测参考来对输入帧进行编码，并且可以将编码的帧数据和输入帧的摄像机位置发送到解码器。因此，视频编码器可以在有限的基础上进行变换的推导和执行，从而节省系统资源。

2. 发明申请

US20120207214A1 WEIGHTED PREDICTION PARAMETER ESTIMATION 审中-公开
标题翻译：加权预测参数估计
公开(公告)号：US20120207214A1
公开(公告)日：2012-08-16
申请号：US13077803
申请日：2011-03-31
申请人： Xiaosong Zhou , Douglas Scott Price , Yao-Chung Lin , Hsi-Jung Wu
发明人： Xiaosong Zhou , Douglas Scott Price , Yao-Chung Lin , Hsi-Jung Wu
IPC分类号： H04N7/26
CPC分类号： H04N19/85 , H04N19/105 , H04N19/137 , H04N19/14 , H04N19/17 , H04N19/176 , H04N19/61 , H04N19/80
摘要： Video coding systems incorporate techniques for deriving scalars W and/or O for use in weighted prediction. W represents a scaling factor and O represents an offset value. Given a frame of input video to be coded, a prediction match may be established one or more reference frames. The input frame may be parsed into a plurality of regions. Thereafter the scaling factor W and/or offset value O may be derived by developing a system of equations relating a predicted pixel to the pixel in the frame by the scaling factor W and/or offset value O. Equations within the system may be prioritized according to priority among regions, and scaling factor W and/or offset value O may be solved for. The scaling factor W and/or offset value O may be used during weighted prediction of the input frame.
摘要翻译：视频编码系统包括用于导出用于加权预测的标量W和/或O的技术。 W表示缩放因子，O表示偏移值。给定要编码的输入视频的帧，可以建立一个或多个参考帧的预测匹配。输入框可以被解析成多个区域。此后，可以通过将预测像素与帧中的像素相关联的等式系数通过缩放因子W和/或偏移值O来开发来推定比例因子W和/或偏移值O.系统内的等式可以根据在区域之间优先，并且可以求解缩放因子W和/或偏移值O. 缩放因子W和/或偏移值O可以在输入帧的加权预测期间使用。

3. 发明授权

US10205953B2 Object detection informed encoding 有权
公开(公告)号：US10205953B2
公开(公告)日：2019-02-12
申请号：US13359377
申请日：2012-01-26
申请人： Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou , Dazhong Zhang
发明人： Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou , Dazhong Zhang
IPC分类号： H04N19/20 , H04N19/176 , H04N19/115 , H04N19/124 , H04N19/137 , H04N19/17 , G06K9/34 , G06K9/00 , G06K9/46 , G06K9/62 , G06T7/10 , G06T7/11 , G06T7/12 , G06T7/13 , G06T7/136 , G06T7/181 , G06T7/143 , G06T7/187 , G06T7/194
摘要： Embodiments of the present invention provide techniques for coding video data efficiently based on detection of objects within video sequences. A video coder may perform object detection on the frame and when an object is detected, develop statistics of an area of the frame in which the object is located. The video coder may compare pixels adjacent to the object location to the object's statistics and may define an object region to include pixel blocks corresponding to the object's location and pixel blocks corresponding to adjacent pixels having similar statistics as the detected object. The coder may code the video frame according to a block-based compression algorithm wherein pixel blocks of the object region are coded according to coding parameters generating relatively high quality coding and pixel blocks outside the object region are coded according to coding parameters generating relatively lower quality coding.

4. 发明申请

US20130195178A1 OBJECT DETECTION INFORMED ENCODING 审中-公开
标题翻译：对象检测通知编码
公开(公告)号：US20130195178A1
公开(公告)日：2013-08-01
申请号：US13359377
申请日：2012-01-26
申请人： Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou , Dazhong Zhang
发明人： Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou , Dazhong Zhang
IPC分类号： H04N7/26
CPC分类号： H04N19/20 , G06K9/00221 , G06K9/00234 , G06K9/00248 , G06K9/0061 , G06K9/342 , G06K9/4638 , G06K9/6202 , G06T7/10 , G06T7/11 , G06T7/12 , G06T7/13 , G06T7/136 , G06T7/143 , G06T7/181 , G06T7/187 , G06T7/194 , G06T2207/20012 , G06T2207/20016 , G06T2207/20116 , G06T2207/20121 , G06T2207/20124 , G06T2207/20128 , G06T2207/20132 , G06T2207/20152 , G06T2207/20156 , G06T2207/20161 , G06T2207/20164 , G06T2207/20168 , G06T2207/30201 , H04N19/115 , H04N19/124 , H04N19/137 , H04N19/17 , H04N19/176
摘要： Embodiments of the present invention provide techniques for coding video data efficiently based on detection of objects within video sequences. A video coder may perform object detection on the frame and when an object is detected, develop statistics of an area of the frame in which the object is located. The video coder may compare pixels adjacent to the object location to the object's statistics and may define an object region to include pixel blocks corresponding to the object's location and pixel blocks corresponding to adjacent pixels having similar statistics as the detected object. The coder may code the video frame according to a block-based compression algorithm wherein pixel blocks of the object region are coded according to coding parameters generating relatively high quality coding and pixel blocks outside the object region are coded according to coding parameters generating relatively lower quality coding.
摘要翻译：本发明的实施例提供了基于视频序列内的对象的检测来有效地对视频数据进行编码的技术。视频编码器可以在帧上执行对象检测，并且当检测到对象时，开发对象所在的帧的区域的统计。视频编码器可以将与物体位置相邻的像素与对象的统计信息进行比较，并且可以定义对象区域以包括对应于对象的位置的像素块和对应于具有与检测对象相似的统计信息的相邻像素的像素块。编码器可以根据基于块的压缩算法对视频帧进行编码，其中根据产生相对较高质量编码的编码参数来编码对象区域的像素块，并且根据生成相对较低质量的编码参数对目标区域外的像素块进行编码编码。

5. 发明授权

US08493499B2 Compression-quality driven image acquisition and processing system 有权
标题翻译：压缩质量驱动图像采集和处理系统
公开(公告)号：US08493499B2
公开(公告)日：2013-07-23
申请号：US12794475
申请日：2010-06-04
申请人： Xiaosong Zhou , Douglas Scott Price , Hsi-Jung Wu , Dazhong Zhang
发明人： Xiaosong Zhou , Douglas Scott Price , Hsi-Jung Wu , Dazhong Zhang
IPC分类号： H04N5/235 , H04N7/12 , G06K9/36
CPC分类号： H04N5/232 , H04N19/102 , H04N19/117 , H04N19/134 , H04N19/146 , H04N19/154 , H04N19/85
摘要： Embodiments of the present invention provide a video encoding system in which a video coding engine establishes coding quality metrics that govern its own operation as well as the operation of a camera and/or a pre-processor. An imaging system may include an image acquisition system, a pre-processor and a coding engine. The coding engine may output a quality indicator identifying, for each portion of a video sequence currently being coded, a relatively level of coding quality that is being achieved. The imaging system further may include an image acquisition controller and a pre-processor controller that impose respective operating parameters upon the image acquisition system and the pre-processor in response to these quality indicators. In this manner, overall performance of the imaging system may be improved.
摘要翻译：本发明的实施例提供了一种视频编码系统，其中视频编码引擎建立控制其自身操作以及照相机和/或预处理器的操作的编码质量度量。成像系统可以包括图像采集系统，预处理器和编码引擎。编码引擎可以输出质量指示符，对于正在编码的视频序列的每个部分，识别正在实现的相对级别的编码质量。成像系统还可以包括图像采集控制器和预处理器控制器，其响应于这些质量指示器，在图像采集系统和预处理器上施加相应的操作参数。以这种方式，可以提高成像系统的整体性能。

6. 发明申请

US20120170654A1 VIDEO CODING SYSTEM USING IMPLIED REFERENCE FRAMES 有权
标题翻译：使用暗示参考框架的视频编码系统
公开(公告)号：US20120170654A1
公开(公告)日：2012-07-05
申请号：US12986703
申请日：2011-01-07
申请人： Ke Zhang , Dazhong Zhang , Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou
发明人： Ke Zhang , Dazhong Zhang , Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou
IPC分类号： H04N7/32 , H04N7/26
CPC分类号： H04N7/26 , H04N19/23 , H04N19/58
摘要： A video coding/decoding system builds implied reference frames from a plurality of reference frames developed during coding. Coded data of reference pictures are decoded and stored in a reference picture cache. An implied reference frame may be derived from a plurality of reference frames and may be stored in the reference picture cache. Thereafter, coding of new input data may proceed using the implied reference frame as a source of prediction. The method may be used to identify visual elements such as background elements that may persist in video over a longer period that can be captured by the system under conventional reference frames assembly and eviction. Implied reference frames may be built at both an encoder and a decoder to serve as sources of prediction.
摘要翻译：视频编码/解码系统从编码期间开发的多个参考帧构建隐含的参考帧。参考图像的编码数据被解码并存储在参考图像缓存中。可以从多个参考帧导出隐含的参考帧，并且可以将其存储在参考图像高速缓存中。此后，可以使用隐含参考帧作为预测源来进行新输入数据的编码。该方法可以用于识别视觉元素，例如可以在可在常规参考帧组装和驱逐下由系统捕获的较长时间段内持续存在视频的背景元素。可以在编码器和解码器两者构建隐含的参考帧以用作预测的源。

7. 发明授权

US08842723B2 Video coding system using implied reference frames 有权
标题翻译：视频编码系统使用隐含的参考帧
公开(公告)号：US08842723B2
公开(公告)日：2014-09-23
申请号：US12986703
申请日：2011-01-07
申请人： Ke Zhang , Dazhong Zhang , Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou
发明人： Ke Zhang , Dazhong Zhang , Douglas Scott Price , Hsi-Jung Wu , Xiaosong Zhou
IPC分类号： H04N7/26 , H04N7/32 , H04N19/00 , H04N19/50
CPC分类号： H04N7/26 , H04N19/23 , H04N19/58
摘要： A video coding/decoding system builds implied reference frames from a plurality of reference frames developed during coding. Coded data of reference pictures are decoded and stored in a reference picture cache. An implied reference frame may be derived from a plurality of reference frames and may be stored in the reference picture cache. Thereafter, coding of new input data may proceed using the implied reference frame as a source of prediction. The method may be used to identify visual elements such as background elements that may persist in video over a longer period that can be captured by the system under conventional reference frames assembly and eviction. Implied reference frames may be built at both an encoder and a decoder to serve as sources of prediction.
摘要翻译：视频编码/解码系统从编码期间开发的多个参考帧构建隐含的参考帧。参考图像的编码数据被解码并存储在参考图像缓存中。可以从多个参考帧导出隐含的参考帧，并且可以将其存储在参考图像高速缓存中。此后，可以使用隐含参考帧作为预测源来进行新输入数据的编码。该方法可以用于识别视觉元素，例如可以在可在常规参考帧组装和驱逐下由系统捕获的较长时间段内持续存在视频的背景元素。可以在编码器和解码器两者构建隐含的参考帧以用作预测的源。

8. 发明申请

US20130003845A1 ADAPTIVE CONFIGURATION OF REFERENCE FRAME BUFFER BASED ON CAMERA AND BACKGROUND MOTION 有权
标题翻译：基于相机和背景运动的参考框架缓冲器的自适应配置
公开(公告)号：US20130003845A1
公开(公告)日：2013-01-03
申请号：US13175143
申请日：2011-07-01
申请人： Xiaosong Zhou , Hsi-Jung Wu , Yao-Chung Lin
发明人： Xiaosong Zhou , Hsi-Jung Wu , Yao-Chung Lin
IPC分类号： H04N7/32
CPC分类号： H04N19/58 , H04N19/105 , H04N19/109 , H04N19/139 , H04N19/172 , H04N19/197 , H04N19/46 , H04N19/61
摘要： In a video coding/decoding system, reference picture caches in a video coder and decoder may be partitioned dynamically based on camera and background motion can lead to improved coding efficiency and coding quality. When a camera is fixed and therefore exhibits low motion, a system may allocate larger portions of the reference picture cache to storage of long term reference frames. In this case, foreground elements of an image (for example, a person) may move in front of a relatively fixed background. Increasing the number of long term reference frames can increase the chances that, no matter where the foreground elements are within a frame currently being coded, the reference picture cache will contain at least one frame that provides an adequate prediction match to background elements within the new frame. Thus the background elements uncovered in the current frame can be coded at high quality with a low number of bits. When a camera exhibits high motion, the system may allocate larger portions of the reference picture cache to storage of short term reference frames.
摘要翻译：在视频编码/解码系统中，视频编码器和解码器中的参考图像高速缓存可以基于相机进行动态分割，并且背景运动可以提高编码效率和编码质量。当照相机固定并因此表现出低运动时，系统可以将较大部分的参考图像高速缓存分配给长期参考帧的存储。在这种情况下，图像的前景元素（例如，人）可以在相对固定的背景之前移动。增加长期参考帧的数量可以增加机会，无论前景元素在当前正被编码的帧内的何处，参考图像高速缓存将包含至少一个帧，其提供与新的背景元素内的足够的预测匹配帧。因此，当前帧中未覆盖的背景元素可以以低位数的高质量被编码。当相机呈现高运动时，系统可以将较大部分的参考图像高速缓存分配给短期参考帧的存储。

9. 发明授权

US09635374B2 Systems and methods for coding video data using switchable encoders and decoders 有权
公开(公告)号：US09635374B2
公开(公告)日：2017-04-25
申请号：US13564686
申请日：2012-08-01
申请人： Xiaosong Zhou , Hsi-Jung Wu , Chris Y. Chung , Feng Yi
发明人： Xiaosong Zhou , Hsi-Jung Wu , Chris Y. Chung , Feng Yi
IPC分类号： H04N19/42 , H04N19/12
CPC分类号： H04N19/42 , H04N19/12
摘要： A system and method for switching between multiple encoders or decoders may be implemented to quickly and seamlessly transfer coding operations between two encoders. Before switching from a first encoder to a second encoder, the second encoder is initialized and updated with a copy of the necessary information from the first encoder. Similarly when switching from a first decoder to a second decoder, the second decoder is initialized and the necessary information from the first decoder is passed to the second decoder. A controller may monitor the system to identify a condition that would trigger an encoder switch and identify the encoder that best suits the system conditions. A shared memory unit accessible by either encoder may store the initialization information. A shared decode unit accessible by either encoder may transmit decoded frames between encoders.

10. 发明申请

US20120106632A1 METHOD AND APPARATUS FOR ERROR RESILIENT LONG TERM REFERENCING BLOCK REFRESH 审中-公开
标题翻译：用于错误恢复长期参考块修改的方法和装置
公开(公告)号：US20120106632A1
公开(公告)日：2012-05-03
申请号：US12914650
申请日：2010-10-28
申请人： Dazhong Zhang , Xiaosong Zhou , Hsi-Jung Wu
发明人： Dazhong Zhang , Xiaosong Zhou , Hsi-Jung Wu
IPC分类号： H04N7/50
CPC分类号： H04N19/89 , H04N19/107 , H04N19/14 , H04N19/176 , H04N19/61
摘要： A system and method for coding video data wherein a pixel block may be coded for refresh with reference to an LTR frame that was successfully transmitted, or has a high probability of having been successfully transmitted from the encoder to the decoder. Not all pixel blocks in the frame may be refreshed at the same rate. Pixel blocks containing edge details, containing a significant object, or containing foreground image data may be refreshed more often than pixel blocks containing smooth, background, or relatively less significant image data.
摘要翻译：一种用于对视频数据进行编码的系统和方法，其中像素块可以被编码用于参考已经成功发送的LTR帧进行刷新，或者具有从编码器成功发送到解码器的高概率。不是帧中的所有像素块可以以相同的速率刷新。包含重要对象或包含前景图像数据的边缘细节的像素块可能比包含平滑，背景或相对不太重要的图像数据的像素块更频繁地刷新。

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