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公开(公告)号：US5533138A
公开(公告)日：1996-07-02
申请号：US239848
申请日：1994-05-09
IPC分类号： H04N5/92 , G06T9/00 , H03M7/00 , H04N1/41 , H04N5/783 , H04N5/926 , H04N7/26 , H04N7/28 , H04N7/30 , H04N7/12 , G06K9/36
CPC分类号： H04N5/9264 , H04N19/124 , H04N19/14 , H04N19/147 , H04N19/15 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/196 , H04N19/60 , H04N19/94 , H04N19/146 , H04N5/783
摘要： Television images to be digitally recorded are divided into blocks and the discrete cosine transform DCT of each block is taken. The DC coefficient of each DCT block is scalar-quantized, and its AC coefficients are classified-vector-quantized (CVQ). The square of the value that part or all the AC coefficients among horizontal AC coefficients including a first AC coefficient and vertical AC coefficients including a second AC coefficient, according to the zigzag scanning sequence of DCT block, are subtracted from a representative value of a preset reference class. Using a multilevel compression method, lowest level codes are vector-partitioned by P-units at equal intervals with respect to each classified DCT block, and code books of representative vectors corresponding to the partitioned vectors are provided. Indices of corresponding representative vectors in respective code books and the classified codes are taken as encoding data corresponding to AC coefficients to keep a constant number of bits in the lowest level codes. Then, errors created in a preceding level are corrected. Code books of S-units of representative vectors corresponding to the errors are provided again, and corresponding indices and parity data in the respective code books are provided. Here, codes are output in which an image is more compactly compressed in lower levels, and higher levels have more elaborate picture quality. During tape recording, the codes descriptive of the scalar quantized DC term, the classification of the AC terms and the lowest-level vector-quantization index for each successive DCT block are grouped together for recording in a respective one of regularly spaced equal-length segments of the recording tracks. Decoding is performed in the reverse sequence of encoding. During a high speed search, only lowest level codes having a constant number of bits are decoded regardless of the complexity of the picture, so that picture quality is good enough to discern the nature of the images.
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2.发明授权Data coding for a digital video tape recorder suitable for high speed picture playback 失效适用于高速图像播放的数字录像机的数据编码
公开(公告)号：US5526131A
公开(公告)日：1996-06-11
申请号：US214153
申请日：1994-03-17
IPC分类号： H04N5/92 , H04N5/7826 , H04N5/783 , H04N5/93 , H04N7/26 , H04N9/804 , H04N5/76 , H04N5/78 , H04N7/12
CPC分类号： H04N9/8042 , H04N19/186 , H04N19/63 , H04N19/30 , H04N5/78263 , H04N5/783
摘要： A method and apparatus for compression encoding successive input images into a plurality of sync blocks which are sequentially recorded on a record carrier, comprises digitally processing each of the input images in accordance with a first image compression encoding technique so as to provide a first digital signal representative of a low resolution version of each of the input images. The input images are also digitally processed in accordance with a second image compression encoding technique which is different from the first image compression encoding technique so as to provide a second digital signal representative of a higher resolution version of each of the input images. Consecutive portions of both of the first and second digital signals are combined into sequential sync blocks which are then sequentially recorded on a record carrier.
摘要翻译： 一种用于将连续输入图像压缩编码成顺序记录在记录载体上的多个同步块的方法和装置，包括根据第一图像压缩编码技术对每个输入图像进行数字处理，以便提供第一数字信号 代表每个输入图像的低分辨率版本。 输入图像也根据与第一图像压缩编码技术不同的第二图像压缩编码技术进行数字处理，以便提供表示每个输入图像的较高分辨率版本的第二数字信号。 第一和第二数字信号的连续部分被组合成顺序同步块，然后顺序地记录在记录载体上。
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3.发明授权Data placement on tape for a digital video tape recorder suitable for high speed picture playback 失效适用于高速图像播放的数字录像机的磁带上的数据放置
公开(公告)号：US5574565A
公开(公告)日：1996-11-12
申请号：US335211
申请日：1994-10-28
IPC分类号： G11B5/09 , G11B5/008 , G11B5/02 , G11B15/18 , H04N5/76 , H04N5/7826 , H04N5/783 , H04N5/92 , H04N9/804 , G11B5/00 , H04N5/78
CPC分类号： G11B15/1875 , G11B5/0086 , H04N9/8042 , H04N5/78263 , H04N5/783
摘要： A video tape includes a plurality of parallel slant tracks formed therein. Each track includes a plurality of successively recorded sync blocks. In each sync block, a respective portion of a first digital signal recorded therein represents a predetermined portion of an input image with relatively low resolution, and a respective portion of a second digital signal recorded therein represents substantially the same predetermined portion of the input image with relatively high resolution. Successive sync blocks include consecutive portions of the first digital signal, which portions correspond to spatially adjacent portions of the input image. Preferably, each sync block includes a fixed number of bits of the first digital signal, which is decodable without reference to any image coded signal from other sync blocks. The first digital signal codes the input images as raster scanned in reduced-resolution form for reproduction during a trickplay mode and the second digital signal comprises variable-bit-length codes permitting reproduction of the input images in full-resolution form during a normal-play mode. The second digital signal is not decodable unless there is reference to the portion of the first digital signal recorded in the same sync block, or portions of the second digital signal in other ones of the sync blocks, or to the portion of the first digital signal recorded in the same sync block and portions of the second digital signal in other ones of the sync blocks.
摘要翻译： 视频磁带包括形成在其中的多个平行斜线。 每个轨道包括多个连续记录的同步块。 在每个同步块中，其中记录的第一数字信号的相应部分表示具有相对低分辨率的输入图像的预定部分，并且其中记录的第二数字信号的相应部分表示输入图像的基本相同的预定部分， 相对较高的分辨率。 连续同步块包括第一数字信号的连续部分，哪些部分对应于输入图像的空间相邻部分。 优选地，每个同步块包括第一数字信号的固定数量的比特，其可解码，而不参考来自其他同步块的任何图像编码信号。 第一数字信号将输入图像编码为在特技播放模式期间以降低分辨率形式扫描的光栅进行再现，并且第二数字信号包括允许在正常播放期间以全分辨率形式再现输入图像的可变比特长度码 模式。 第二数字信号不能解码，除非参考记录在同一同步块中的第一数字信号的部分，或其他同步块中的第二数字信号的部分，或第一数字信号的部分 记录在相同的同步块中，并且第二数字信号的部分在其他同步块中。
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4.发明授权Data placement on tape for a digital video tape recorder suitable for high speed picture playback 失效适用于高速图像播放的数字录像机的磁带上的数据放置
公开(公告)号：US5398143A
公开(公告)日：1995-03-14
申请号：US983741
申请日：1992-12-01
IPC分类号： G11B5/09 , G11B5/008 , G11B5/02 , G11B15/18 , H04N5/76 , H04N5/7826 , H04N5/783 , H04N5/92 , H04N9/804
CPC分类号： G11B15/1875 , G11B5/0086 , H04N9/8042 , H04N5/78263 , H04N5/783
摘要： An image carrier for storing video information including a plurality of slant tracks recorded thereon, wherein each of the tracks is characterized as including a predetermined number of sync blocks defining a predetermined track length, wherein each of the sync blocks is divided into first and second portions storing respective first and second digital signals coded therein. The first digital signal permits reconstruction of an input image during a trickplay mode of operation while the second digital signal permits reconstruction of an input image with a comparable resolution during a normal play mode of operation. On the average, the first digital signal of each sync block represents a complete scan line of the input image.
摘要翻译： 一种用于存储包括记录在其上的多个倾斜轨道的视频信息的图像载体，其中每个轨道的特征在于包括预定数量的定义预定轨道长度的同步块，其中每个同步块被分成第一和第二部分 存储其中编码的相应的第一和第二数字信号。 第一数字信号允许在特技播放操作模式期间重建输入图像，而第二数字信号允许在正常播放操作模式期间以相当的分辨率重建输入图像。 平均而言，每个同步块的第一个数字信号表示输入图像的完整扫描线。
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5.发明授权Apparatus for generating timing signals for a digital television signal receiver 失效一种用于产生数字电视信号接收机的定时信号的装置
公开(公告)号：US5872815A
公开(公告)日：1999-02-16
申请号：US602943
申请日：1996-02-16
IPC分类号： H03D3/00 , H03J7/04 , H04L7/027 , H04L7/033 , H04L25/03 , H04L27/00 , H04N5/44 , H03D1/00 , H04L27/22
CPC分类号： H04L27/0008 , H03J7/04 , H04L25/0307 , H04L7/0278 , H04N5/4401 , H03D3/007 , H04L2025/03382 , H04L2025/0342 , H04L2025/0349 , H04L7/0334
摘要： A QAM/VSB digital receiver is disclosed which includes a source of a QAM/VSB signal. An analog-to-digital converter is coupled to the QAM/VSB signal source, and is further responsive to a sample clock signal. A filter/complement is coupled to the analog-to-digital converter and has a first output terminal which produces a low-pass filtered QAM/VSB signal, and a second output terminal which produces a high-pass filtered QAM/VSB signal complementary to the low-pass filtered QAM/VSB signal. A sample clock generating circuit is coupled to the second output terminal of the filter/complement and produces the sample clock signal in response to the high-pass filtered QAM/VSB signal.
摘要翻译： 公开了一种包括QAM / VSB信号源的QAM / VSB数字接收机。 模数转换器耦合到QAM / VSB信号源，并进一步响应采样时钟信号。 滤波器/补码耦合到模数转换器，并且具有产生低通滤波QAM / VSB信号的第一输出端和产生高通滤波QAM / VSB信号的第二输出端 低通滤波QAM / VSB信号。 采样时钟发生电路耦合到滤波器/补码的第二输出端，并响应于高通滤波QAM / VSB信号产生采样时钟信号。
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6.发明申请公开(公告)号：US20090051821A1
公开(公告)日：2009-02-26
申请号：US12255182
申请日：2008-10-21
申请人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
发明人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
IPC分类号： H04N5/455
CPC分类号： H04L25/0224 , H04L27/0008 , H04L2025/03503
摘要： An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.
摘要翻译： 公开了用于最佳地接收和处理信号的自适应接收机。 接收机利用一个或多个存储器块来存储输入符号组。 符号组由信道估计子系统处理以确定信道特性。 接收机根据确定的信道特性确定适当的解调和解码策略来实现。 接收机包括多个解调和解码方案，其中之一是基于信道估计分析的结果来选择的。
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公开(公告)号：US08948240B2
公开(公告)日：2015-02-03
申请号：US12255182
申请日：2008-10-21
申请人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
发明人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
CPC分类号： H04L25/0224 , H04L27/0008 , H04L2025/03503
摘要： An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.
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公开(公告)号：US5757855A
公开(公告)日：1998-05-26
申请号：US565608
申请日：1995-11-29
CPC分类号： H04L25/03267
摘要： A data detector is disclosed which includes a source of a data signal representing a sequence of symbols. A maximum likelihood sequence detector, is coupled to the data signal source, and produces a most likely survivor sequence, which includes a plurality of symbols. A decision feedback equalizer and a phase detector, controlling the timing of the sampling of the data signal, are made responsive to the most likely survivor sequence.
摘要翻译： 公开了一种数据检测器，其包括表示符号序列的数据信号源。 最大似然序列检测器耦合到数据信号源，并且产生最可能的存活序列，其包括多个符号。 对最可能的幸存者序列作出响应，决定反馈均衡器和相位检测器控制数据信号的采样定时。
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公开(公告)号：US07953193B2
公开(公告)日：2011-05-31
申请号：US10386795
申请日：2003-03-12
CPC分类号： H04L25/0218 , H04L25/03057 , H04L25/03987 , H04L2025/0349 , H04L2025/03617 , H04L2025/0377
摘要： Sparse channel equalization may be achieved by receiving a signal via a multi-path communication channel. The equalization then continues by extracting sparse information regarding the multiple path communication channel from the signal. Such sparse information generally indicates the position of the signals received via each of the multiple paths. The equalization then continues by estimating a channel response of the multiple path communication channel based on the sparse information. The equalization then continues by generating equalization taps (or coefficients) based on the channel response. The equalization then continues by equalizing the signal based on the equalization taps.
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公开(公告)号：US07440520B2
公开(公告)日：2008-10-21
申请号：US11754866
申请日：2007-05-29
申请人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
发明人： Randall Perlow , Charles Brooks , Steven Jaffe , Tianmin Liu
IPC分类号： H04L27/06
CPC分类号： H04L25/0224 , H04L27/0008 , H04L2025/03503
摘要： An adaptive receiver is disclosed for optimally receiving and processing signals. The receiver utilizes one or more memory blocks to store groups of incoming symbols. The groups of symbols are processed by a channel estimation subsystem to determine channel characteristics. The receiver determines the appropriate demodulation and decoding strategy to implement based on the determined channel characteristics. The receiver includes a plurality of demodulation and decoding schemes, one of which is selected based on the results of a channel estimation analysis.
摘要翻译： 公开了用于最佳地接收和处理信号的自适应接收机。 接收机利用一个或多个存储器块来存储输入符号组。 符号组由信道估计子系统处理以确定信道特性。 接收机根据确定的信道特性确定适当的解调和解码策略来实现。 接收机包括多个解调和解码方案，其中之一是基于信道估计分析的结果来选择的。
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