公开(公告)号：US07088780B2

公开(公告)日：2006-08-08

申请号：US09854020

申请日：2001-05-11

申请人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

发明人： Anthony Vetro ,  Huifang Sun ,  Peng Yin ,  Bede Liu ,  Tommy C. Poon

IPC分类号： H04N7/12

CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/40 ,  H04N19/51 ,  H04N19/61

摘要： A method compensates for drift in macroblocks of a partially decoded input bitstream. The macroblocks include intra-mode and inter-mode macroblocks, and each macroblock includes DCT coefficients, and at least one motion vector. An estimate of drift is measured in the partially decoded input bitstream. The estimated drift is translated into an intra refresh rate. The modes of inter-mode macroblock are mapped to intra-mode macroblock according to the refresh rate. The DCT coefficients and the motion vector for each changed macroblock are modified in accordance with the mapping for each changed macroblock.

摘要翻译： 一种补偿部分解码的输入比特流的宏块中的漂移的方法。 宏块包括帧内模式和帧间模式宏块，并且每个宏块包括DCT系数和至少一个运动矢量。 在部分解码的输入比特流中测量漂移的估计。 估计漂移被转换成内部刷新率。 模式间宏块的模式根据刷新率映射到模式内宏块。 根据每个改变的宏块的映射来修改每个改变的宏块的DCT系数和运动矢量。

公开(公告)号：US20050276493A1

公开(公告)日：2005-12-15

申请号：US10858162

申请日：2004-06-01

申请人： Jun Xin ,  Anthony Vetro ,  Huifang Sun

发明人： Jun Xin ,  Anthony Vetro ,  Huifang Sun

IPC分类号： H04N7/32 ,  G06K9/36 ,  G06K9/46 ,  H04N7/26

CPC分类号： H04N19/122 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/40

摘要： A method selects an optimal coding mode for each macroblock in a video. Each macroblock can be coded according a number of candidate coding modes. A difference between an input macroblock and a predicted macroblock is determined in a transform-domain. The difference is quantized to yield a quantized difference. An inverse quantization is performed on the quantized difference to yield a reconstructed difference. A rate required to code the quantized difference is determined. A distortion is determined according to the difference and the reconstructed difference. Then, a cost is determined for each candidate mode based on the rate and the distortion, and the candidate coding mode that yields a minimum cost is selected as the optimal coding mode for the macroblock.

摘要翻译： 一种方法为视频中的每个宏块选择最佳编码模式。 每个宏块可以根据多个候选编码模式进行编码。 在变换域中确定输入宏块与预测宏块之间的差异。 该差异被量化以产生量化差异。 对量化差异执行逆量化以产生重建的差异。 确定编码量化差异所需的速率。 根据差异和重建差异确定失真。 然后，基于速率和失真来确定每个候选模式的成本，并且选择产生最小成本的候选编码模式作为宏块的最佳编码模式。

公开(公告)号：US06650705B1

公开(公告)日：2003-11-18

申请号：US09579889

申请日：2000-05-26

申请人： Anthony Vetro ,  Huifang Sun

发明人： Anthony Vetro ,  Huifang Sun

IPC分类号： H04N718

CPC分类号： G06T9/20 ,  H04N19/21 ,  H04N19/29 ,  H04N19/31 ,  H04N19/40

摘要： A video is first partitioned into video objects. If the video is uncompressed, then the partitioning is done with segmentation planes. In the case where the video is compressed, a demultiplexer is used for the partitioning. Over time, shape features are extracted from each partitioned object. The extracted shape features are combined to determined a temporal resolution for each object over time. The temporal resolutions are subsequently used to encode or transcode the video objects as an output compressed video.

摘要翻译： 视频首先被分割成视频对象。 如果视频未压缩，则使用分割平面进行分区。 在视频被压缩的情况下，使用解复用器进行分割。 随着时间的推移，从每个分区对象中提取形状特征。 提取的形状特征被组合以确定每个对象随时间的时间分辨率。 时间分辨率随后用于将视频对象编码或转码为输出压缩视频。

公开(公告)号：US06519288B1

公开(公告)日：2003-02-11

申请号：US09035969

申请日：1998-03-06

申请人： Anthony Vetro ,  Huifang Sun ,  Tommy Poon

发明人： Anthony Vetro ,  Huifang Sun ,  Tommy Poon

IPC分类号： H04N0718

CPC分类号： H04N19/59

摘要： The apparatus for decoding a digital signal includes a composite picture forming unit for forming a composite picture from a first digital video signal and a second digital video signal. The first digital video signal includes inter-coded picture data. A down-converter receives a third digital video signal, and outputs the third digital video signal to the composite picture forming unit as the first digital signal in a first mode. However, the down-converter down-converts the third digital video signal into a fourth digital video signal in a second mode, and outputs the fourth digital video signal to the composite picture forming unit in the second mode. A memory stores the anchor pictures output from the composite picture forming unit, and a motion compensator generates the second digital signal based on the stored anchor pictures.

摘要翻译： 用于对数字信号进行解码的装置包括用于从第一数字视频信号和第二数字视频信号形成合成图像的合成图像形成单元。 第一数字视频信号包括帧间编码图像数据。 下变频器接收第三数字视频信号，并以第一模式将第三数字视频信号作为第一数字信号输出到合成图像形成单元。 然而，下变频器在第二模式中将第三数字视频信号下变频为第四数字视频信号，并在第二模式中将第四数字视频信号输出到复合图像形成单元。 存储器存储从复合图像形成单元输出的锚图像，并且运动补偿器基于存储的锚图像生成第二数字信号。

公开(公告)号：US06493386B1

公开(公告)日：2002-12-10

申请号：US09504323

申请日：2000-02-14

申请人： Anthony Vetro ,  Huifang Sun ,  Yao Wang

发明人： Anthony Vetro ,  Huifang Sun ,  Yao Wang

IPC分类号： H04N726

CPC分类号： H04L65/605 ,  G06T9/20 ,  H04L29/06 ,  H04L29/06027 ,  H04L47/10 ,  H04L65/80 ,  H04L67/2819 ,  H04L67/2823 ,  H04L69/04 ,  H04L69/329 ,  H04N19/124 ,  H04N19/147 ,  H04N19/152 ,  H04N19/172 ,  H04N19/19 ,  H04N19/20 ,  H04N19/25 ,  H04N19/29 ,  H04N19/33 ,  H04N19/40 ,  H04N19/436 ,  H04N19/61 ,  H04N21/84

摘要： A compressed bitstream is scaled down to a reduced rate bitstream by first demultiplexing a compressed input bitstream to extract video objects as elementary input bitstreams having a first bit rate. A transcoder converts each elementary input bitstream to an elementary output bitstream having a second bit rate. The first bit rate is less than the second bit rate. A transcoding control unit, coupled to the transcoder, supplies control information for the transcoder. A multiplexer composes the elementary output bitstreams into a compressed output bitstream having the second bit rate.

摘要翻译： 通过首先对压缩的输入比特流进行解复用以将视频对象提取为具有第一比特率的基本输入比特流，将经压缩的比特流缩小到降低的比特流。 代码转换器将每个基本输入比特流转换为具有第二比特率的基本输出比特流。 第一个比特率小于第二个比特率。 耦合到代码转换器的代码转换控制单元提供代码转换器的控制信息。 多路复用器将基本输出比特流组合成具有第二比特率的压缩输出比特流。

公开(公告)号：US06192080B1

公开(公告)日：2001-02-20

申请号：US09206032

申请日：1998-12-04

申请人： Huifang Sun ,  Anthony Vetro ,  Yen-Kuang Chen ,  Sun-Yuan Kung

发明人： Huifang Sun ,  Anthony Vetro ,  Yen-Kuang Chen ,  Sun-Yuan Kung

IPC分类号： H04N712

CPC分类号： H04N19/577

摘要： A method determines true motion vectors associated with a sequence of images. The images include fields made up of blocks of pixels. The method selects candidate feature blocks from the blocks of pixels. The candidate feature blocks have intensity variances above a threshold indicative of texture features. Candidate feature blocks in similarly numbered adjacent field intervals are compared to determine sets of displaced frame differences parameters for each candidate feature block. The true motion vectors for each candidate feature block are determined from a minimum weighted score derived from the difference parameters.

摘要翻译： 一种方法确定与图像序列相关联的真实运动矢量。 图像包括由像素块组成的场。 该方法从像素块中选择候选特征块。 候选特征块具有高于指示纹理特征的阈值的强度方差。 将相似编号的相邻场间隔中的候选特征块进行比较，以确定每个候选特征块的位移帧差参数的集合。 每个候选特征块的真实运动矢量是从差分参数导出的最小加权得分确定的。

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。

公开(公告)号：US07006572B2

公开(公告)日：2006-02-28

申请号：US10141742

申请日：2002-05-09

申请人： Fatih M. Porikli ,  Huifang Sun

发明人： Fatih M. Porikli ,  Huifang Sun

IPC分类号： H04N7/12

CPC分类号： H04N19/59 ,  H04N19/122 ,  H04N19/129 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/61

摘要： A method decodes a video encoded as a compressed bitstream including frames constructed as blocks. The bitstream is variable length decoded and inverse quantized to determine motion vectors and DCT coefficients of the blocks of the bitstream. The DCT coefficients are then inverse discrete cosine transformed. A low-resolution block is generated for each reconstructed block, and the reconstructed blocks are motion compensated with the low-resolution blocks to decode the video.

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）。

公开(公告)号：US5442400A

公开(公告)日：1995-08-15

申请号：US53760

申请日：1993-04-29

申请人： Huifang Sun ,  Joel W. Zdepski ,  Kamil M. Uz

发明人： Huifang Sun ,  Joel W. Zdepski ,  Kamil M. Uz

IPC分类号： G06T9/00 ,  H04N5/44 ,  H04N7/36 ,  H04N7/50 ,  H04N19/895 ,  H04N7/64 ,  H04N7/66

CPC分类号： H04N19/00 ,  H04N19/51 ,  H04N19/61 ,  H04N19/895 ,  H04N19/70 ,  H04N5/4401

摘要： A video signal compression system includes motion compensated predictive compression apparatus for compressing respective frames of video signal according to either intraframe processing or interframe processing on a block by block basis to generate blocks of compressed data and associated motion vectors. A compressed signal formatter arranges the blocks of compressed data and the associated motion vectors according to a desired signal protocol wherein motion vectors of interframe processed frames are associated with corresponding blocks of compressed data and motion vectors of intraframe processed frames are associated with blocks substantially adjacent to corresponding blocks of compressed data. The motion vectors are included with intraframe compressed data to facilitate error concealment at respective receiver apparatus.

摘要翻译： 视频信号压缩系统包括运动补偿预测压缩装置，用于根据帧内处理或帧间处理逐帧地压缩视频信号的各个帧，以生成压缩数据块和相关联的运动矢量。 压缩信号格式化器根据期望的信号协议排列压缩数据块和相关联的运动矢量，其中帧间处理帧的运动矢量与对应的压缩数据块相关联，并且帧内处理帧的运动矢量与基本相邻的块相关联 对应的压缩数据块。 运动矢量被包括在帧内压缩数据中，以便于在各个接收机设备处的错误隐藏。