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81. 发明授权

US06519288B1 Three-layer scaleable decoder and method of decoding 失效
标题翻译：三层可扩展解码器和解码方法
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。

82. 发明授权

US06493386B1 Object based bitstream transcoder 有权
标题翻译：基于对象的比特流代码转换器
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。

83. 发明授权

US06192081B1 Apparatus and method for selecting a coding mode in a block-based coding system 失效
标题翻译：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。

84. 发明授权

US06192080B1 Motion compensated digital video signal processing 失效
标题翻译：运动补偿数字视频信号处理
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。

85. 发明授权

US6160846A Apparatus and method for optimizing the rate control in a coding system 失效
标题翻译：用于优化编码系统中的速率控制的装置和方法
公开(公告)号：US6160846A
公开(公告)日：2000-12-12
申请号：US738228
申请日：1996-10-23
申请人： Tihao Chiang , Huifang Sun , Wilson Kwok , Max Chien , Ya-Qin Zhang
发明人： Tihao Chiang , Huifang Sun , Wilson Kwok , Max Chien , Ya-Qin Zhang
IPC分类号： H04N7/30 , G06T9/00 , H04N7/26 , H04N7/50
CPC分类号： H04N19/517 , H04N19/10 , H04N19/115 , H04N19/124 , H04N19/126 , H04N19/14 , H04N19/146 , H04N19/147 , H04N19/152 , H04N19/176 , H04N19/186 , H04N19/192 , H04N19/61 , H04N19/63 , H04N19/64
摘要： A method and apparatus for selecting a quantizer scale for each macroblock to maintain the overall quality of the video image while optimizing the coding rate. A quantizer scale is selected for each macroblock such that target bit rate for the picture is achieved while an optimal quantization scale ratio is maintained for successive macroblocks to produce a uniform visual quality over the entire picture. One embodiment applies the method to the frame level while another embodiment applies the method in conjunction with a wavelet transform.
摘要翻译：一种用于为每个宏块选择量化器尺度以在优化编码率的同时维持视频图像的整体质量的方法和装置。为每个宏块选择一个量化器标尺，以便实现图像的目标比特率，同时为连续的宏块保持最佳量化比例比，以在整个图像上产生均匀的视觉质量。一个实施例将该方法应用于帧级，而另一实施例将该方法应用于小波变换。

86. 发明授权

US5835151A Method and apparatus for down-converting a digital signal 失效
标题翻译：用于下变频数字信号的方法和装置
公开(公告)号：US5835151A
公开(公告)日：1998-11-10
申请号：US648358
申请日：1996-05-15
申请人： Huifang Sun , Jay Bao , Tommy C. Poon
发明人： Huifang Sun , Jay Bao , Tommy C. Poon
IPC分类号： H04N7/01 , H04N7/26
CPC分类号： H04N7/0125 , H04N19/40 , H04N19/85
摘要： A method and apparatus for down-converting a digital video signal includes a synthesizer and a converter. The synthesizer receives a digital video signal including at least first and second DCT blocks of DCT coefficients, and synthesizes the first and second DCT blocks into a single synthesized DCT block having dimensions equal to the first and second DCT blocks. The converter converts the synthesized DCT block from the DCT domain to the spatial domain to produce an output digital video signal.
摘要翻译：用于下变频数字视频信号的方法和装置包括合成器和转换器。合成器接收包括DCT系数的至少第一和第二DCT块的数字视频信号，并将第一和第二DCT块合成为具有等于第一和第二DCT块的尺寸的单个合成DCT块。转换器将合成DCT块从DCT域转换为空间域，以产生输出数字视频信号。

87. 发明授权

US5455629A Apparatus for concealing errors in a digital video processing system 失效
标题翻译：用于隐藏数字视频处理系统中的错误的装置
公开(公告)号：US5455629A
公开(公告)日：1995-10-03
申请号：US17455
申请日：1993-02-12
申请人： Huifang Sun , Joel W. Zdepski
发明人： Huifang Sun , Joel W. Zdepski
IPC分类号： H04N5/44 , H04N7/24 , H04N7/54 , H04N7/60 , H04N19/895 , H04N21/438 , H04N21/442 , H04N7/12
CPC分类号： H04N21/4382 , H04N19/152 , H04N19/174 , H04N19/30 , H04N19/37 , H04N19/423 , H04N19/577 , H04N19/61 , H04N19/895 , H04N21/44209 , H04N5/4401 , H04N7/54 , H04N19/50 , H04N19/70
摘要： A digital video signal processing system includes apparatus for concealing errors which might occur in reproduced images due to image data lost during signal transmission. The system includes circuitry for detecting transmitted video data, generating error signals if errors are present in segments (transport blocks) of the received data, and excising segments having errors from the data stream. The received data is applied to a decoder/decompressor system which decodes and decompresses the transmitted video data according to a predetermined sequence and applies the decompressed video data to a memory (for subsequent display or recording, etc.). The decompressor is responsive to the error signals for altering the predetermined sequence.
摘要翻译：数字视频信号处理系统包括用于在信号传输期间由于图像数据丢失而隐藏在再现图像中可能发生的错误的装置。该系统包括用于检测传输的视频数据的电路，如果在接收到的数据的段（传输块）中存在错误，则产生误差信号，以及从数据流切除具有错误的段。所接收的数据被应用于解码器/解压缩器系统，该解码器/解压缩器系统根据预定的顺序解码和解压缩传输的视频数据，并将解压缩的视频数据应用于存储器（用于随后的显示或记录等）。解压缩器响应于错误信号来改变预定的顺序。

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