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    Method and apparatus for scaling a compressed video bitstream
    1.
    发明授权
    Method and apparatus for scaling a compressed video bitstream 失效
    用于缩放压缩视频比特流的方法和装置

    公开(公告)号：US5889561A

    公开(公告)日：1999-03-30

    申请号：US334282

    申请日：1994-11-04

    申请人： Wilson Kwok ,  Joel Walter Zdepski ,  Huifang Sun

    发明人： Wilson Kwok ,  Joel Walter Zdepski ,  Huifang Sun

    IPC分类号： H04N5/765 ,  G06T9/00 ,  H04N5/92 ,  H04N7/26 ,  H04N7/50 ,  H04N7/18

    CPC分类号： H04N19/40 ,  H04N19/149 ,  H04N19/15 ,  H04N19/61

    摘要： A method and apparatus for scaling the bitstream of a compressed video signal includes partial decoding hardware (38, 41) to permit excising of higher frequency AC DCT coefficients or re-quantizing quantized data with a coarser quantization factor. The scaling is performed on a block (macroblock) basis in a manner which linearly scales the amount of compressed data per block. An analyzer (40) generates a profile of cumulative partially decompressed data over a video frame, and bitstream scaling (42) is performed in a manner which insures that a profile of the scaled signal substantially comports with the profile of the original data.

    摘要翻译： 用于缩放压缩视频信号的比特流的方法和装置包括部分解码硬件（38,41），以允许更高频AC DCT系数的切换或者用较粗略的量化因子重新量化量化的数据。 以块（宏块）为基础，以每个块的压缩数据的数量线性缩放的方式执行缩放。 分析器（40）通过视频帧生成累积部分解压缩数据的简档，并且以确保缩放信号的简档基本上与原始数据的简档相一致的方式执行比特流缩放（42）。

    System for processing data in variable segments and with variable data resolution
    2.
    发明授权
    System for processing data in variable segments and with variable data resolution 失效
    用于处理可变段和可变数据分辨率数据的系统

    公开(公告)号：US5828788A

    公开(公告)日：1998-10-27

    申请号：US572844

    申请日：1995-12-14

    申请人： Tihao Chiang ,  Huifang Sun ,  Joel Walter Zdepski

    发明人： Tihao Chiang ,  Huifang Sun ,  Joel Walter Zdepski

    IPC分类号： G06T9/00 ,  H03M7/30 ,  H04N7/26 ,  G06K9/46 ,  H04N7/12

    CPC分类号： H04N19/37 ,  H04N19/30

    摘要： A dynamically configurable video signal processing system partitions and encodes data using a variable number of data segments and variable data resolution. The system partitions data into a variable number of data segments by predicting, as a function of the data rate, first and second distortion factors for the data partitioned into first and second numbers of data segments. The first and second distortion factors are mutually compared and the data is partitioned into the number of data segments which exhibits the lower distortion factor value. First and second distortion factors for the data encoded with first and second data resolutions are also predicted. The first and second distortion factors are similarly compared and the data is encoded with the resolution exhibiting the lower distortion factor value.

    摘要翻译： 动态可配置的视频信号处理系统使用可变数量的数据段和可变数据分辨率对数据进行分区和编码。 该系统通过根据数据速率预测分割为第一和第二数量数据段的数据的第一和第二失真因子来将数据分割成可变数量的数据段。 相互比较第一和第二失真因子，并将数据划分成具有较低失真因子值的数据段的数量。 还预测了用第一和第二数据分辨率编码的数据的第一和第二失真因子。 类似地比较第一和第二失真因子，并且数据以表现出较低失真因子值的分辨率进行编码。

    System for encoding and decoding layered compressed video data
    3.
    发明授权
    System for encoding and decoding layered compressed video data 失效
    分层压缩视频数据的编码和解码系统

    公开(公告)号：US06553072B1

    公开(公告)日：2003-04-22

    申请号：US08890192

    申请日：1997-07-09

    申请人： Tihao Chiang ,  Huifang Sun ,  Joel Walter Zdepski

    发明人： Tihao Chiang ,  Huifang Sun ,  Joel Walter Zdepski

    IPC分类号： H04N712

    CPC分类号： H04N19/37 ,  H04N19/30

    摘要： A dynamically configurable video signal processing system including an encoder and decoder processes data in the form of hierarchical layers. The system partitions data between hierarchical layers and allows variation in the number of layers employed. Data is automatically partitioned into one or more hierarchical layers as a function of one or more parameters selected from available system bandwidth, input data rate, and output signal quality. In addition, the image resolution and corresponding number of pixels per image of the data may be varied as a function of system parameters.

    摘要翻译： 包括编码器和解码器的可动态配置的视频信号处理系统以层级的形式处理数据。 系统在层次层之间划分数据，并允许使用层数的变化。 根据从可用系统带宽，输入数据速率和输出信号质量中选择的一个或多个参数，数据被自动分割成一个或多个分级层。 此外，数据图像的图像分辨率和相应的像素数可以作为系统参数的函数而变化。

    Error concealment apparatus for video signal processors
    4.
    发明授权
    Error concealment apparatus for video signal processors 失效
    视频信号处理器的错误隐藏装置

    公开(公告)号：US5365604A

    公开(公告)日：1994-11-15

    申请号：US4358

    申请日：1993-01-14

    申请人： Wilson Kwok ,  Huifang Sun

    发明人： Wilson Kwok ,  Huifang Sun

    IPC分类号： H03M13/00 ,  H04N5/92 ,  H04N5/94 ,  H04N19/895 ,  G06K9/40

    CPC分类号： H04N19/895

    摘要： Error concealment apparatus for correcting errors in signals representing video images includes means for detecting image gradients in an area surrounding a lost block of image data. Circuitry responsive to these image gradients generates a plurality of blocks of directionally interpolated pixel values. The pixel values in the respective blocks of directionally interpolated pixel values are sorted according to amplitude, and then pixel values from mutually exclusive positions in the respective blocks are selected to form a block of pixel values for error concealment.

    摘要翻译： 用于校正表示视频图像的信号中的错误的错误隐藏装置包括用于检测围绕丢失的图像数据块的区域中的图像梯度的装置。 响应于这些图像梯度的电路产生多个定向内插像素值的块。 根据幅度对定向插值像素值的各个块中的像素值进行排序，然后选择各个块中来自互斥位置的像素值，以形成用于错误隐藏的像素值块。

    Apparatus and method for selecting a coding mode in a block-based coding system
    5.
    发明授权
    Apparatus and method for selecting a coding mode in a block-based coding system 失效
    用于在基于块的编码系统中选择编码模式的装置和方法

    公开(公告)号：US06192081B1

    公开(公告)日：2001-02-20

    申请号：US09549244

    申请日：1995-10-26

    申请人： Tihao Chiang ,  Max Chien ,  Wilson Kwok ,  Huifang Sun

    发明人： Tihao Chiang ,  Max Chien ,  Wilson Kwok ,  Huifang Sun

    IPC分类号： H04N736

    CPC分类号： H04N19/567 ,  H04N19/107 ,  H04N19/124 ,  H04N19/14 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/176 ,  H04N19/192 ,  H04N19/51 ,  H04N19/61

    摘要： An apparatus and concomitant method for selecting a macroblock coding mode based upon the quantization scale selected for the macroblock. The total number of bits needed to code each macroblock consists of two parts, bits needed for coding motion vectors and bits for coding the predictive residual. The number of bits for coding the motion vectors is generally obtained from a look-up table. The number of bits for coding the predictive residual is obtained by an estimation which assumes that the number of bits for encoding the predictive residuals is directly proportional to the value of its variance and inversely proportional to the value of quantizer steps (quantizer scale). Using this estimation, the total number of bits necessary to code a macroblock is calculated and compared for each coding mode. By selecting the coding mode with the least number of bits, a near-optimal solution of low complexity for practical implementation is acquired.

    摘要翻译： 一种用于基于为宏块选择的量化尺度来选择宏块编码模式的装置和并发方法。 编码每个宏块所需的总位数由两部分组成：编码运动矢量所需的位和用于编码预测残差的位。 用于编码运动矢量的比特数通常从查找表中获得。 用于对预测残差进行编码的比特数是通过估计假定用于编码预测残差的比特数与其方差的值成正比并与量化器步长（量化比例）成反比的方式获得的。 使用该估计，对于每个编码模式，计算并比较对宏块进行编码所需的总位数。 通过选择具有最少位数的编码模式，获得了用于实际实现的低复杂度的近似最优解。

    Method and System for Decoding Multiview Videos with Prediction Dependencies
    7.
    发明申请
    Method and System for Decoding Multiview Videos with Prediction Dependencies 有权
    用预测依赖关系解码多视点视频的方法和系统

    公开(公告)号：US20100322311A1

    公开(公告)日：2010-12-23

    申请号：US12871249

    申请日：2010-08-30

    申请人： Anthony Vetro ,  Huifang Sun ,  Jun Xin ,  Emin Martinian ,  Alexander Behrens

    发明人： Anthony Vetro ,  Huifang Sun ,  Jun Xin ,  Emin Martinian ,  Alexander Behrens

    IPC分类号： H04N7/32

    CPC分类号： H04N19/615 ,  H04N19/105 ,  H04N19/13 ,  H04N19/46 ,  H04N19/597 ,  H04N19/61 ,  H04N19/63

    摘要： Multiview videos are acquired of a scene with corresponding cameras arranged at poses, such that there is view overlap between any pair of cameras. V-frames are generated from the multiview videos. The V-frames are encoded using only spatial prediction. Then, the V-frames are inserted periodically in an encoded bit stream to provide random temporal access to the multiview videos. Additional view dependency information enables the decoding of a reduced number of frames prior to accessing randomly a target frame for a specified view and time, and decoding the target frame. The method also decodes multiview videos by maintaining a reference picture list for a current frame of a plurality of multiview videos, and predicting each current frame of the plurality of multiview videos according to reference pictures indexed by the associated reference picture list.

    摘要翻译： 多视点视频被采集到具有以姿势布置的相应摄像机的场景，使得在任何一对摄像机之间存在视图重叠。 V帧是从多视角视频生成的。 V帧仅使用空间预测编码。 然后，将V帧周期性地插入到编码比特流中，以便为多视点视频提供随机的时间访问。 附加的视图依赖性信息使得能够在对指定的视图和时间的随机访问目标帧之前对减少数量的帧进行解码，以及对目标帧进行解码。 该方法还通过维护多个多视角视频的当前帧的参考图片列表，并根据由相关参考图片列表索引的参考图片来预测多个多视角视频中的每个当前帧来对多视点视频进行解码。