公开(公告)号：EP0524625A3

公开(公告)日：1994-01-19

申请号：EP92112592.8

申请日：1992-07-23

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Heegard, Chris ,  Krause, Edward A. ,  Heller, Jerrold A.

IPC分类号： H04N7/13 ,  H04L27/34 ,  H04N7/00

CPC分类号： H04L1/0057 ,  H04L1/0071 ,  H04L27/3438 ,  H04N7/015 ,  H04N21/2383 ,  H04N21/4382

摘要： A method and apparatus for communicating high definition television signals is provided. Video signals are divided into blocks of PCM data. The PCM data is processed using motion estimation and compensation (150) to provide DPCM data. For each block, one of PCM and DPCM data is selected for transmission based on a predetermined criteria. The selected data is compressed using the discrete cosine transform (133,134) to provide blocks of transform coefficients. The coefficients are quantized (135,136) to improve their coding efficiency and then variable length coded (138). The variable length coded coefficients are coded using a concatenated coding scheme with a Reed-Solomon outer code and trellis inner code to provide coded signals for transmission. The coded signals are transmitted using QAM.

摘要翻译： 提供了一种用于传送高清晰度电视信号的方法和设备。 视频信号被分成PCM数据块。 使用运动估计和补偿（150）来处理PCM数据以提供DPCM数据。 对于每个块，PCM和DPCM数据中的一个被选择用于基于预定标准进行传输。 所选数据使用离散余弦变换（133,134）进行压缩以提供变换系数块。 量化系数（135,136）以提高其编码效率，然后进行可变长度编码（138）。 可变长度编码系数使用具有Reed-Solomon外部码和网格内部码的级联编码方案进行编码，以提供用于传输的编码信号。 编码信号使用QAM传输。

公开(公告)号：EP0574724A2

公开(公告)日：1993-12-22

申请号：EP93108225.9

申请日：1993-05-20

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Krause, Edward A. ,  Liu, Vincent

IPC分类号： H04N7/13

CPC分类号： H04N19/102 ,  H04N19/10 ,  H04N19/103 ,  H04N19/124 ,  H04N19/14 ,  H04N19/146 ,  H04N19/15 ,  H04N19/176 ,  H04N19/192 ,  H04N19/30 ,  H04N19/39 ,  H04N19/50 ,  H04N19/60 ,  H04N19/61

摘要： An apparatus and method for adaptively compressing blocks of video image data provide a local coding level (34) for use in compressing successive blocks of video image data. Each block is preliminarily compressed (30) using a global coding level. The preliminarily compressed data is processed (32) to provide a measure of the randomness of an image area represented by the block of video image data. A local coding level is generated (34) based on the randomness measure. The video image data is then compressed (36) using the local coding level to provide compressed data for transmission. One or more intermediate compression stages (16, 18) can be provided, each generating an intermediate coding level (ICL), to better refine the randomness measure for use in generating the local coding level.

摘要翻译： 用于自适应地压缩视频图像数据块的装置和方法提供用于压缩视频图像数据的连续块的本地编码级（34）。 使用全局编码级别预先压缩（30）每个块。 处理预先压缩的数据（32）以提供由视频图像数据块表示的图像区域的随机性的度量。 基于随机度量产生局部编码级（34）。 然后使用本地编码级压缩视频图像数据（36），以提供用于传输的压缩数据。 可以提供一个或多个中间压缩级（16,18），每个中间压缩级（16,18）生成中间编码级（ICL），以更好地改进用于产生本地编码级的随机度量。

公开(公告)号：EP0562422B1

公开(公告)日：1998-01-21

申请号：EP93104294.9

申请日：1993-03-16

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Fox, John M.

IPC分类号： H04L27/00

CPC分类号： H04L1/0059 ,  H04L1/0071 ,  H04L27/0012 ,  H04N5/211

公开(公告)号：EP0451545B1

公开(公告)日：1996-06-12

申请号：EP91104132.5

申请日：1991-03-18

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Krause, Edward A. ,  Paik, Woo H.

IPC分类号： H04N7/32

CPC分类号： H04N19/154 ,  H04N19/112 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60 ,  H04N19/61

公开(公告)号：EP0574724A3

公开(公告)日：1994-09-21

申请号：EP93108225.9

申请日：1993-05-20

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Krause, Edward A. ,  Liu, Vincent

IPC分类号： H04N7/13

CPC分类号： H04N19/102 ,  H04N19/10 ,  H04N19/103 ,  H04N19/124 ,  H04N19/14 ,  H04N19/146 ,  H04N19/15 ,  H04N19/176 ,  H04N19/192 ,  H04N19/30 ,  H04N19/39 ,  H04N19/50 ,  H04N19/60 ,  H04N19/61

摘要： An apparatus and method for adaptively compressing blocks of video image data provide a local coding level (34) for use in compressing successive blocks of video image data. Each block is preliminarily compressed (30) using a global coding level. The preliminarily compressed data is processed (32) to provide a measure of the randomness of an image area represented by the block of video image data. A local coding level is generated (34) based on the randomness measure. The video image data is then compressed (36) using the local coding level to provide compressed data for transmission. One or more intermediate compression stages (16, 18) can be provided, each generating an intermediate coding level (ICL), to better refine the randomness measure for use in generating the local coding level.

公开(公告)号：EP0524560A3

公开(公告)日：1993-05-19

申请号：EP92112306.3

申请日：1992-07-18

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Wu, Allen

IPC分类号： H04L25/03

CPC分类号： H04L25/03038 ,  H04L2025/0342 ,  H04L2025/03477 ,  H04L2025/03617

摘要： Convergence of a complex adaptive equalizer (18) used in digital communications is substantially improved by updating all coefficients of the equalizer during each filter clock cycle. Complex signal data is passed through a plurality of successive delay stages (94) to provide N sets of delayed complex signal data. The product of each set and a complex error signal is obtained (100). Each product is concurrently updated with previous product data for the set to provide N sets of updated complex coefficients for selective input to equalizer filters. In an illustrated embodiment, the updated coefficients are truncated (108) and their gain is adjusted prior to input to the filters (34 ... 34 M ). The updated coefficients can be multiplexed (110) to provide a clocked stream of coefficient sets for input to the equalizer filters. A VLSI implementation (120) of the equalizer is also disclosed.

公开(公告)号：EP0524625A2

公开(公告)日：1993-01-27

申请号：EP92112592.8

申请日：1992-07-23

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H. ,  Lery, Scott A. ,  Heegard, Chris ,  Krause, Edward A. ,  Heller, Jerrold A.

IPC分类号： H04N7/13 ,  H04L27/34 ,  H04N7/00

CPC分类号： H04L1/0057 ,  H04L1/0071 ,  H04L27/3438 ,  H04N7/015 ,  H04N21/2383 ,  H04N21/4382

摘要： A method and apparatus for communicating high definition television signals is provided. Video signals are divided into blocks of PCM data. The PCM data is processed using motion estimation and compensation (150) to provide DPCM data. For each block, one of PCM and DPCM data is selected for transmission based on a predetermined criteria. The selected data is compressed using the discrete cosine transform (133,134) to provide blocks of transform coefficients. The coefficients are quantized (135,136) to improve their coding efficiency and then variable length coded (138). The variable length coded coefficients are coded using a concatenated coding scheme with a Reed-Solomon outer code and trellis inner code to provide coded signals for transmission. The coded signals are transmitted using QAM.

摘要翻译： 本发明提供一种用于传送高清晰度电视信号的方法和装置。 视频信号被分成PCM数据块。 该PCM数据是使用运动估计和补偿（150），以提供DPCM数据进行处理。 对于每个块，PCM和DPCM数据的一个被选择用于基于预定标准的传输。 所选择的数据是使用离散余弦变换（133，134），以提供变换系数的块压缩。 该系数被量化（135，136），以改善编码效率及其然后可变长度编码（138）。 该可变长度编码系数使用与里德 - 所罗门外码（200）和格状内码（204）级联编码方案（180）以提供用于传输编码信号编码。 的编码信号是使用QAM（184）反式mitted。

公开(公告)号：EP0499088A2

公开(公告)日：1992-08-19

申请号：EP92101401.5

申请日：1992-01-29

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Shen, Paul ,  Krause, Edward A. ,  Paik, Woo H.

IPC分类号： H04N7/137 ,  H04N11/00

CPC分类号： H04N19/00 ,  H04N19/107 ,  H04N19/30 ,  H04N19/436 ,  H04N19/577 ,  H04N19/61 ,  H04N19/70 ,  H04N21/236 ,  H04N21/434

摘要： Digital video signals are processed by a plurality of independently operating processors (42, 44, 46, 48) to provide data for transmission in a compressed, motion compensated form. A video image frame area (10) is divided into a set of subframes (12, 16, 20, 24). The set of subframes is systematically shifted such that the individual subframes progressively cycle across and wrap around the video image frame area. For each successive video frame, video image data bounded by each of the different subframes is independently compressed using motion estimation to reduce data redundancy among the successive frames. The motion estimation is limited for each subframe of a current video frame to areas of a previous video frame that were bounded by the same subframe in the previous frame. In an illustrated embodiment, the set of subframes (12, 16, 20, 24) is shifted once for each successive video frame, and each subframe includes a refresh region (14, 18, 22, 26) whereby the video image frame area (10) is progressively refreshed as the subframes are shifted thereacross. Receiver apparatus (60-82) for use in decoding the independently processed subframe data is also disclosed.

摘要翻译： 数字视频信号由unabhängig操作处理器的多个（42，44，46，48）以压缩，运动补偿形式，以提供用于传输的数据处理。一种视频图像帧区域（10）被划分为一组子帧（ 12，16，20，24）。 该组子帧的系统地移检测所做的个体子帧周期逐步跨越并围绕视频图象帧区包裹。 对于每个连续的视频帧，视频图像数据由每个不同的子帧的边界是unabhängig利用运动估计以降低连续帧之间的数据冗余压缩。 运动估计被限制对于当前视频帧的每个子帧中的先前视频帧的区域thatwere由前一帧相同的子帧边界。 在图示的实施方式中，该组子帧的（12，16，20，24）被用于每个连续视频帧移位一次，并且每个子帧包括刷新区域（14，18，22，26），由此视频图像帧区域（ 10）作为子帧被移位跨过被渐进刷新的。 因此在处理unabhängig子帧数据进行解码使用的接收器装置（60-82）是圆盘游离缺失。

公开(公告)号：EP0467040A2

公开(公告)日：1992-01-22

申请号：EP91108087.7

申请日：1991-05-18

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Krause, Edward A. ,  Paik, Woo H. ,  Liu, Vincent ,  Esserman, Jim

IPC分类号： H04N7/137

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

摘要： A method and apparatus are provided for processing digital video signals for transmission in a compressed form. A set of pixel data is compressed without motion compensation to provide a first compressed video signal. The pixel data is compressed using motion compensation to provide a second compressed video signal. The data in the first and second compressed video signals is quantified. A comparison is made to determine which of the signals contains the least data. Successive sets of pixel data are sequentially compressed and quantified and the compressed video signal having the least data for each particular set is selected. The selected signals are encoded to identify them as motion compensated or non-motion compensated signals, and combined to provide a compressed video signal data stream for transmission. Apparatus for receiving and decoding the signals is also disclosed.

摘要翻译： 提供了一种用于处理数字视频信号以便以压缩形式传输的方法和装置。 一组像素数据被压缩而没有运动补偿以提供第一压缩视频信号。 使用运动补偿压缩像素数据以提供第二压缩视频信号。 量化第一和第二压缩视频信号中的数据。 进行比较以确定哪些信号包含最少的数据。 顺序压缩和量化连续的像素数据集，并且选择具有每个特定集合的最小数据的压缩视频信号。 所选择的信号被编码以将其识别为运动补偿或非运动补偿信号，并且被组合以提供用于传输的压缩视频信号数据流。 还公开了用于接收和解码信号的装置。

公开(公告)号：EP0346700A3

公开(公告)日：1991-11-06

申请号：EP89109971.5

申请日：1989-06-02

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paik, Woo H.

IPC分类号： H04N7/167

CPC分类号： H04N7/1713

摘要： A descrambler for a scrambled channel having a suppressed horizontal synchronization pulse which scrambled channel is provided in a broadband cable television signal along with nonscrambled channels. A signal splitter receives the broadband CATV signal and provides first and second split outputs. A switch coupled to the second output of the signal splitter passes the horizontal synchronization pulse of the scrambled channel and blocks the video signal of the scrambled channel. The horizontal synchronization pulse passing through the switch is then phase adjusted to synchronize with the horizontal synchronization pulse of the scrambled channel provided at the first output of the signal splitter, and both horizontal synchronization pulses are summed in a combiner along with the video/audio signal provided at the first output of the signal splitter. Consequently, the full synchronization pulse is provided at the output of the combiner to descramble the scrambled channel. No band reject filter is required between the first output of the power splitter and the power combiner so that the nonscrambled channels are unaffected by the descrambler.