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    Method of chroma-keying for a digital video compression system
    4.
    发明授权
    Method of chroma-keying for a digital video compression system 失效
    数字视频压缩系统色度键控方法

    公开(公告)号：US6084982A

    公开(公告)日：2000-07-04

    申请号：US992291

    申请日：1997-12-17

    申请人： Kiran Challapali ,  Yingwei Chen

    发明人： Kiran Challapali ,  Yingwei Chen

    IPC分类号： H04N9/75 ,  H04N7/26 ,  H04N11/04

    CPC分类号： H04N9/75 ,  H04N19/124 ,  H04N19/14 ,  H04N19/152 ,  H04N19/176 ,  H04N19/186 ,  H04N19/20

    摘要： A method of performing chroma-key coding including the steps of defining color regions and quantifying the number of pixels in the regions, classifying macroblocks in accordance with the number of pixels thus quantified, assigning chroma complexity weights for use in the computation of quantization step-size based on the classification of the macroblocks, computing the quantization step-size, performing quantization and performing variable length coding.

    摘要翻译： 一种执行色键编码的方法，包括定义颜色区域和量化该区域中的像素数量的步骤，根据如此量化的像素数量对宏块进行分类，分配用于计算量化步长的色度复杂度权重， 基于宏块的分类，计算量化步长，执行量化和执行可变长度编码。

    System for detecting redundant images in a video sequence by comparing two predetermined threshold values
    5.
    发明授权
    System for detecting redundant images in a video sequence by comparing two predetermined threshold values 失效
    用于通过比较两个预定阈值来检测视频序列中的冗余图像的系统

    公开(公告)号：US06298090B1

    公开(公告)日：2001-10-02

    申请号：US09090594

    申请日：1998-06-04

    申请人： Kiran Challapali ,  Yingwei Chen

    发明人： Kiran Challapali ,  Yingwei Chen

    IPC分类号： H04N718

    CPC分类号： H04N19/587 ,  H04N19/132

    摘要： A system for detecting redundant images in a video sequence includes dividing a target image in the video sequence into a plurality of regions, and determining, for each of the plurality of regions, a local value comprising a sum of differences between individual pixels of each region and corresponding pixels in at least one other image in the video sequence. The local value for each of the plurality of regions is then compared to a first predetermined threshold. The system also includes determining a global value comprising a sum of differences between substantially all pixels in the target image and corresponding pixels in the at least one other image, and comparing the global value to a second predetermined threshold. An indication that the target image is redundant is then output in a case that the local value does not exceed the first predetermined threshold for all regions, and the global value does not exceed the second predetermined threshold.

    摘要翻译： 一种用于检测视频序列中的冗余图像的系统，包括将视频序列中的目标图像划分为多个区域，并且针对多个区域中的每一个确定包括每个区域的各个像素之间的差异之和的局部值 以及视频序列中的至少一个其他图像中的对应像素。 然后将多个区域中的每一个的局部值与第一预定阈值进行比较。 该系统还包括确定包括目标图像中的基本上所有像素与至少一个其它图像中的相应像素之间的差的总和，并将全局值与第二预定阈值进行比较的全局值。 然后在本地值不超过所有区域的第一预定阈值并且全局值不超过第二预定阈值的情况下输出目标图像是冗余的指示。

    Method of frame-by-frame calculation of quantization matrices
    7.
    发明授权
    Method of frame-by-frame calculation of quantization matrices 失效
    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。

    Cyclic resynchronization marker for error tolerate video coding
    9.
    发明授权
    Cyclic resynchronization marker for error tolerate video coding 失效
    用于容错视频编码的循环重新同步标记

    公开(公告)号：US07242714B2

    公开(公告)日：2007-07-10

    申请号：US10284218

    申请日：2002-10-30

    申请人： Jong Chul Ye ,  Yingwei Chen

    发明人： Jong Chul Ye ,  Yingwei Chen

    IPC分类号： H04N1/66 ,  G06K9/36

    CPC分类号： H04N21/4143 ,  H04N19/66 ,  H04N19/68 ,  H04N19/89

    摘要： A system and method are disclosed that provide an advanced design of coded video packets using a resynchronization maker for video transmission applications. The resynchronization marker has a fixed ranged bit length within each video object plane or video frame and is cyclically updated video frame by video frame. This coded video packet structure allows decoders to automatically find the video object plane boundary without additional bit stream overhead. This has a particular advantage when a video object plane header is lost during transmission.

    摘要翻译： 公开了一种系统和方法，其提供使用用于视频传输应用的再同步制造者的编码视频分组的高级设计。 再同步标记在每个视频对象平面或视频帧内具有固定的范围位长度，并且通过视频帧循环更新视频帧。 这种编码的视频分组结构允许解码器自动找到视频对象平面边界，而不需要额外的比特流开销。 当在传输期间视频对象平面头丢失时，这具有特别的优点。

    System and method for combining advanced data partitioning and fine granularity scalability for efficient spatiotemporal-snr scalability video coding and streaming
    10.
    发明申请
    System and method for combining advanced data partitioning and fine granularity scalability for efficient spatiotemporal-snr scalability video coding and streaming 审中-公开
    用于结合高级数据分区和精细粒度可扩展性的高效时空snr可扩展性视频编码和流式传输的系统和方法

    公开(公告)号：US20070121719A1

    公开(公告)日：2007-05-31

    申请号：US10573747

    申请日：2004-09-27

    申请人： Mihaela Van Der Schaar ,  Yingwei Chen

    发明人： Mihaela Van Der Schaar ,  Yingwei Chen

    IPC分类号： H04B1/66 ,  H04N7/12

    CPC分类号： H04N21/234327 ,  H04N19/103 ,  H04N19/115 ,  H04N19/14 ,  H04N19/147 ,  H04N19/172 ,  H04N19/34 ,  H04N19/40 ,  H04N19/61 ,  H04N21/234363 ,  H04N21/2662 ,  H04N21/64322

    摘要： A system and method is provided for combining advanced data partitioning and fine granularity scalability in the transmission of digital video signals. A partition unit 440 located in a base layer encoding unit 410 of a video encoder 400 partitions a base layer bit stream 310, 320 into a base layer first partition bit stream 310 and a base layer second partition bit stream 320. Each of the two base layer bit streams 310, 320 may be output directly or may be encoded before output. The two base layer bit streams 310, 320 may be encoded with a scalable encoder unit 442 or with a non-scalable encoder unit 444. Fine granularity scalability is improved by providing an extended base layer bit rate. The bit rate range for advanced data partitioning is also extended. The invention provides improved video coding efficiency, complexity scalability, and spatial scalability.

    摘要翻译： 提供了一种系统和方法，用于在数字视频信号的传输中组合高级数据分割和精细粒度可伸缩性。 位于视频编码器400的基本层编码单元410中的分区单元440将基本层比特流310,320划分为基本层第一分区比特流310和基本层第二分割比特流320.两个基底 可以直接输出层位流310,320，或者可以在输出之前进行编码。 两个基本层比特流310,320可以用可缩放编码器单元442或不可缩放编码器单元444进行编码。通过提供扩展的基本层比特率来提高细粒度可伸缩性。 高级数据分区的比特率范围也得到扩展。 本发明提供了改进的视频编码效率，复杂度可扩展性和空间可伸缩性。