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51. 发明授权

US06608867B2 Detection and proper scaling of interlaced moving areas in MPEG-2 compressed video 有权
标题翻译： MPEG-2压缩视频中隔行移动区域的检测和适当缩放
公开(公告)号：US06608867B2
公开(公告)日：2003-08-19
申请号：US09823361
申请日：2001-03-30
申请人： Zhun Zhong , Tse-hua Lan , Yingwei Chen
发明人： Zhun Zhong , Tse-hua Lan , Yingwei Chen
IPC分类号： H04N712
CPC分类号： H04N19/137 , H04N19/112 , H04N19/61
摘要： The present invention provides a method of and system for determining whether a local area of a compressed video stream represented by a plurality of DCT encoded blocks subject to decoding and filtering/scaling is a stationary area or an interlaced moving area. Further, given such information, the invention relates to dynamically switching between frame- or field-based operations in a smart way, thus optimizing the output picture quality. Also, a DCT-domain-filtering scheme for field-based filtering/scaling of frame-DCT data is provided herein.
摘要翻译：本发明提供了一种用于确定经过解码和滤波/缩放的多个DCT编码块表示的压缩视频流的局部区域是静止区域还是隔行移动区域的方法和系统。此外，给定这样的信息，本发明涉及以智能方式动态地切换基于帧或场的操作，从而优化输出画面质量。此外，本文提供了用于帧DCT数据的基于场的滤波/缩放的DCT域滤波方案。

52. 发明授权

US06501797B1 System and method for improved fine granular scalable video using base layer coding information 有权
标题翻译：使用基层编码信息改进细粒度可伸缩视频的系统和方法
公开(公告)号：US06501797B1
公开(公告)日：2002-12-31
申请号：US09347881
申请日：1999-07-06
申请人： Mihaela van der Schaar , Yingwei Chen , Hayder Radha
发明人： Mihaela van der Schaar , Yingwei Chen , Hayder Radha
IPC分类号： H04B1404
CPC分类号： H04N19/34 , H04N19/103 , H04N19/137 , H04N19/146 , H04N19/187 , H04N19/29 , H04N19/33 , H04N19/37
摘要： There is disclosed an apparatus for controlling the transmission of enhancement layer video data for use in a video encoder containing a base layer encoder and an enhancement layer encoder. The base layer encoder receives input video frames and generates compressed base layer video frames suitable for transmission at a base layer bit rate to a streaming video receiver. The enhancement layer encoder compares the input video frames and a processed version of the compressed base layer video frames and generates enhancement layer video data suitable for transmission at a modifiable enhancement layer bit rate to the streaming video receiver. The apparatus comprises a base layer parameter monitor for receiving at least one base layer parameter and, in response thereto, modifying an allocation of the enhancement layer video data among corresponding ones of the compressed base layer video frames.
摘要翻译：公开了一种用于控制在包含基本层编码器和增强层编码器的视频编码器中使用的增强层视频数据的传输的装置。基层编码器接收输入视频帧，并产生适合于以基层比特率传输的压缩基层视频帧到流视频接收机。增强层编码器比较输入视频帧和经压缩的基本层视频帧的处理版本，并生成适于以可修改的增强层比特率传输到流式视频接收机的增强层视频数据。该装置包括用于接收至少一个基本层参数的基本层参数监视器，并且响应于此，在相应的压缩基本层视频帧中修改增强层视频数据的分配。

53. 发明授权

US6101278A System for extracting coding parameters from video data 失效
标题翻译：用于从视频数据中提取编码参数的系统
公开(公告)号：US6101278A
公开(公告)日：2000-08-08
申请号：US16038
申请日：1998-01-30
申请人： Yingwei Chen , Kiran Challapali , Mahesh Balakrishnan
发明人： Yingwei Chen , Kiran Challapali , Mahesh Balakrishnan
IPC分类号： H04N7/26 , H04N7/30 , G06K9/36 , H04N7/12
CPC分类号： H04N19/40 , H04N19/124 , H04N19/126 , H04N19/136 , H04N19/14 , H04N19/172 , H04N19/176 , H04N19/60 , H04N19/85 , H04N19/146 , H04N19/149 , H04N19/15
摘要： A system extracts, from uncoded video data, coding parameters that correspond substantially to coding parameters used in a coding operation that was previously performed on the video data. The system generates a histogram for at least one AC frequency band in the uncoded video data and calculates a correlation function for the histogram. A maximum value of the correlation function is then identified, and a coding parameter for the at least one AC frequency band is determined using the maximum value of the correlation function.
摘要翻译：系统从未编码的视频数据中提取与以前对视频数据执行的编码操作中使用的编码参数基本相符的编码参数。系统为未编码视频数据中的至少一个AC频带生成直方图，并计算直方图的相关函数。然后识别相关函数的最大值，并且使用相关函数的最大值来确定用于至少一个AC频带的编码参数。

54. 发明授权

US6067118A Method of frame-by-frame calculation of quantization matrices 失效
标题翻译：量化矩阵逐帧计算的方法
公开(公告)号：US6067118A
公开(公告)日：2000-05-23
申请号：US991521
申请日：1997-12-16
申请人： Yingwei Chen , Kiran Challapali
发明人： Yingwei Chen , Kiran Challapali
IPC分类号： G06T9/00 , H04N7/26 , H04N7/30
CPC分类号： H04N19/126 , H04N19/60 , H04N19/124
摘要： A method of reducing distortion in a video signal by coding a video frame utilizing a quantization matrix specifically determined for the video frame. The method includes the steps of determining the degree to which the video signal is spread about an average value, determining an average quantizer scale-value Q for the video frame, determining a reference weighted distortion for all DCT frequency bands in the video frame, determining the quantization parameter through a normalized distortion function, determining each weight for each DCT frequency band and coding the video frame taking into account the determined weights in the quantization matrix.
摘要翻译：一种通过使用专门为视频帧确定的量化矩阵对视频帧进行编码来减少视频信号中的失真的方法。该方法包括以下步骤：确定视频信号关于平均值的扩展程度，确定视频帧的平均量化器比例值Q，确定视频帧中所有DCT频带的参考加权失真，确定通过归一化失真函数的量化参数，确定每个DCT频带的每个权重，并且考虑到量化矩阵中确定的权重对视频帧进行编码。

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