公开(公告)号：US5093720A

公开(公告)日：1992-03-03

申请号：US570157

申请日：1990-08-20

申请人： Edward A. Krause ,  Woo H. Paik ,  Vincent Liu ,  James N. Esserman

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

IPC分类号： H04N7/26 ,  H04N7/36

CPC分类号： H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/51

摘要： Motion compensated coding of interlaced digital video signals is provided. Pixel data from successive interlaced video fields is compared to similarly situated pixel data in a plurality of previous fields to find a preferred counterpart for each current field set of pixel data. A prediction error signal is generated for each current field set of pixel data indicative of the difference between it and its preferred counterpart from a previous field. Each prediction error signal is encoded with data indicative of the previous field in which the preferred counterpart can be found. In a preferred embodiment, each set of current field pixel data is compared to a range of similarly situated pixels in each of the previous fields, and the prediction error signal is also encoded with motion vector data indicative of the location of the preferred counterpart in its previous field.

摘要翻译： 提供了隔行数字视频信号的运动补偿编码。 将来自连续隔行视频场的像素数据与多个先前场中的类似位置的像素数据进行比较，以找到每个当前像素数据集合的优选对应物。 针对象征数据的每个当前场集合生成一个预测误差信号，指示其与先前场的优先对应物之间的差异。 每个预测误差信号用指示可以找到优选对应物的前一场的数据进行编码。 在优选实施例中，将每组当前场像素数据与先前场的每个场中的类似位置的像素的范围进行比较，并且预测误差信号也用表示优选对应物位置的运动矢量数据进行编码 以前的字段。

公开(公告)号：US5216503A

公开(公告)日：1993-06-01

申请号：US809561

申请日：1991-12-24

申请人： Woo H. Paik ,  Edward A. Krause ,  Vincent Liu ,  Paul Shen ,  Henry Derovanessian

发明人： Woo H. Paik ,  Edward A. Krause ,  Vincent Liu ,  Paul Shen ,  Henry Derovanessian

IPC分类号： H04N1/41 ,  G06T9/00 ,  H04N7/08 ,  H04N7/081 ,  H04N7/58 ,  H04N19/00 ,  H04N21/2365 ,  H04N21/434

CPC分类号： H04N21/2365 ,  H04N19/115 ,  H04N19/124 ,  H04N19/15 ,  H04N19/152 ,  H04N19/176 ,  H04N21/23655 ,  H04N21/4347 ,  H04N19/30

摘要： A multichannel image compression system uses a plurality of encoders to compress image data. A coding level command is provided to each of the encoders to specify a level of quality to be provided by each encoder. Encoded image data, provided by the encoders in response to the coding level command, is multiplexed into a combined signal for transmission. The coding level command is adjusted in response to an accumulated amount of data from the combined signal, to maintain the accumulated data within a throughput capability of a communication channel. Although the coding level command may specify a global coding level that is the same for all of the encoders, the encoders can derive local coding levels from the global coding level to provide different encoding qualities. Decoder apparatus is provided to recover an image from the compressed image data.

公开(公告)号：US5068724A

公开(公告)日：1991-11-26

申请号：US538823

申请日：1990-06-15

申请人： Edward A. Krause ,  Woo H. Paik ,  Vincent Liu ,  Jim Essserman

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

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50

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.

公开(公告)号：US5291281A

公开(公告)日：1994-03-01

申请号：US900904

申请日：1992-06-18

申请人： Woo H. Paik ,  Edward A. Krause ,  Vincent Liu

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

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50 ,  H04N7/133

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

摘要： An apparatus and method for adaptively compressing blocks of video image data provide a local coding level for use in compressing successive blocks of video image data. Each block is preliminarily compressed using a global coding level. The preliminarily compressed data is processed 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 based on the randomness measure. The video image data is then compressed using the local coding level to provide compressed data for transmission. One or more intermediate compression stages can be provided, each generating an intermediate coding level, 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别。 使用全局编码级别预先压缩每个块。 处理预先压缩的数据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别。 然后使用本地编码级压缩视频图像数据，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，每个中间压缩级产生中间编码级别，以便更好地改进用于产生本地编码级别的随机性度量。

公开(公告)号：US5241382A

公开(公告)日：1993-08-31

申请号：US871996

申请日：1992-04-25

申请人： Woo H. Paik ,  Vincent Liu ,  Paul Shen ,  Edward A. Krause

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

IPC分类号： H04N5/44 ,  H04N7/50 ,  H04N7/54 ,  H04N11/04 ,  H04N11/24 ,  H04N19/89 ,  H04N21/236 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/40 ,  H04N21/434 ,  H04N21/438

CPC分类号： H04N11/044 ,  H04N11/008 ,  H04N11/042 ,  H04N19/61 ,  H04N19/89 ,  H04N21/2383 ,  H04N21/4382 ,  H04N5/4401 ,  H04N7/54

摘要： A macroblock packet format is provided for use in a digital HDTV system wherein successive video frames are divided into a plurality of macroblocks. The macroblocks comprise a plurality of superblocks, each containing a plurality of luminance and chrominance video data blocks. A DLEN field is provided in the macroblock packet format to identify the length of the macroblock packet. The packets also include variable length encoded portions of video data. The macroblock packets are transmitted in a data multiplex that also includes a next macroblock position (NMP) word. A receiver compares the DLEN information with the NMP word to verify synchronization, and reacquires the signal if synchronization has been lost.

摘要翻译： 提供了一种在数字HDTV系统中使用的宏块分组格式，其中连续的视频帧被分成多个宏块。 宏块包括多个超块，每个超块包含多个亮度和色度视频数据块。 以宏块分组格式提供DLEN字段以识别宏块分组的长度。 分组还包括视频数据的可变长度编码部分。 在包含下一个宏块位置（NMP）字的数据复用中发送宏块包。 接收机将DLEN信息与NMP字进行比较以验证同步，并且如果同步丢失，则重新获取信号。

公开(公告)号：US5687257A

公开(公告)日：1997-11-11

申请号：US336801

申请日：1994-11-09

申请人： Woo H. Paik ,  Edward A. Krause ,  Vincent Liu

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

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50 ,  G06K9/36

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

摘要： An apparatus and method for adaptively compressing blocks of video image data provide a local coding level for use in compressing successive blocks of video image data. Each block is preliminarily compressed using a global coding level. The preliminarily compressed data is processed 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 based on the randomness measure. The video image data is then compressed using the local coding level to provide compressed data for transmission. One or more intermediate compression stages can be provided, each generating an intermediate coding level, 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别。 使用全局编码级别预先压缩每个块。 处理预先压缩的数据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别。 然后使用本地编码级压缩视频图像数据，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，每个中间压缩级产生中间编码级别，以便更好地改进用于产生本地编码级别的随机性度量。

公开(公告)号：US5057916A

公开(公告)日：1991-10-15

申请号：US614939

申请日：1990-11-16

申请人： Edward Krause ,  Woo H. Paik ,  Vincent C. Liu ,  Jerrold A. Heller ,  Paul Shen ,  James N. Esserman

发明人： Edward Krause ,  Woo H. Paik ,  Vincent C. Liu ,  Jerrold A. Heller ,  Paul Shen ,  James N. Esserman

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50 ,  H04N11/04

CPC分类号： H04N19/55 ,  H04N19/51 ,  H04N19/61 ,  H04N19/107

摘要： An image area is refreshed during the transmission of a set of motion compensated sequential video images. The video images are divided into a plurality of adjacent regions. The image area is refreshed during a refresh cycle by communicating a different region in each successive video image of the set without motion compensation. Motion compensation of the previously refreshed regions of the image area during the refresh cycle is restricted to an area containing only the previously refreshed regions. Video image data from a current region being refreshed is encoded for use by a decoder in identifying it as non-motion compensated data.

公开(公告)号：US5315388A

公开(公告)日：1994-05-24

申请号：US791369

申请日：1991-11-19

申请人： Paul Shen ,  Woo H. Paik ,  Edward A. Krause

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

IPC分类号： H03M7/00 ,  G06T1/60 ,  G11C7/10 ,  H04N5/907 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50

CPC分类号： G11C7/1075 ,  G11C7/1036 ,  H04N19/423 ,  H04N19/433 ,  H04N19/51 ,  H04N19/61

摘要： A multiple serial access memory which includes a dynamic random access memory array is disclosed. The array is randomly addressed to input blocks of data. Address signals are provided to the array to output rows of data. A plurality of serial output ports are coupled to the output of the array for selectively latching different rows of data output from the array. The serial output ports are clocked to output the latched data therefrom. In an illustrated embodiment, each of the serial output ports contains a shift register having a length equal to the width of the memory array. The shift register is responsive to a first timing signal for latching a row of data from the array. A second timing signal actuates the shift register to shift a row of latched data. The serial access selector coupled to the shift register outputs a selected portion of the shifted data from the serial output port. The serial access memory has particular application as the frame store for a motion compensated interframe image coding/decoding system.

摘要翻译： 公开了一种包括动态随机存取存储器阵列的多串行存取存储器。 阵列随机地被寻址到输入数据块。 地址信号被提供给阵列以输出数据行。 多个串行输出端口耦合到阵列的输出端，用于选择性地锁存从阵列输出的不同数据行。 串行输出端口被计时以从其输出锁存的数据。 在所示实施例中，每个串行输出端口包含具有等于存储器阵列宽度的长度的移位寄存器。 移位寄存器响应于第一定时信号来锁存来自阵列的一行数据。 第二定时信号启动移位寄存器以移位一行锁存数据。 耦合到移位寄存器的串行访问选择器从串行输出端口输出移位数据的选定部分。 串行访问存储器具有特定的应用程序作为运动补偿帧间图像编码/解码系统的帧存储。

公开(公告)号：US5138447A

公开(公告)日：1992-08-11

申请号：US653779

申请日：1991-02-11

申请人： Paul Shen ,  Edward A. Krause ,  Woo H. Paik

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

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N7/60 ,  H04N11/04 ,  H04N19/00 ,  H04N21/236 ,  H04N21/434

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

摘要： Digital video signals are processed by a plurality of independently operating processors to provide data for transmission in a compressed, motion compensated form. A video image frame area is divided into a set of subframes. 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 is shifted once for each successive video frame, and each subframe includes a refresh region whereby the video image frame area is progressively refreshed as the subframes are shifted thereacross. Receiver apparatus for use in decoding the independently processed subframe data is also disclosed.

公开(公告)号：US5376968A

公开(公告)日：1994-12-27

申请号：US23251

申请日：1993-03-11

申请人： Allen Wu ,  Edward A. Krause ,  Woo H. Paik

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

IPC分类号： H04N7/30 ,  G06T9/00 ,  H03M7/30 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50 ,  H04N7/137

CPC分类号： H04N19/90 ,  H04N19/12 ,  H04N19/186 ,  H04N19/503 ,  H04N19/51 ,  H04N19/517 ,  H04N19/61

摘要： Digital video signals are adaptively compressed for communication to a receiver. Superblocks, each containing a plurality of blocks of digital video data, are compressed using PCM, DPCM with a general motion vector for the entire superblock, and DPCM with a specific motion vector for each block contained within a superblock. The result of each compression mode is compared after accounting for overhead data, to determine which results in the least amount of data for each block. These blocks are assembled into a superblock, and compared together with necessary overhead and motion vector data to the same superblock processed using all PCM as well as the superblock processed using all DPCM. The comparison determines which compression mode produces the least amount of data for the superblock. The most compact superblock is selected for transmission. The transmitted superblocks are decoded by a decoder that recovers the necessary motion vectors and overhead information which identifies the type of compression used to provide the superblock.

摘要翻译： 数字视频信号被自适应地压缩以用于与接收机的通信。 使用具有用于整个超块的通用运动矢量的PCM，DPCM以及包含在超级块内的每个块的特定运动矢量的DPCM对每个包含多个数字视频数据块的超块进行压缩。 在计算开销数据后，对每个压缩模式的结果进行比较，以确定每个块的数据量最少的结果。 这些块被组装成超级块，并且与必要的开销和运动矢量数据一起与使用所有PCM处理的相同的超级块以及使用所有DPCM处理的超级块进行比较。 该比较确定哪个压缩模式为超级块产生最少量的数据。 选择最紧凑的超级块进行传输。 发送的超块被解码器解码，该解码器恢复必要的运动矢量和标识用于提供超级块的压缩类型的开销信息。