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。

公开(公告)号：US5533138A

公开(公告)日：1996-07-02

申请号：US239848

申请日：1994-05-09

申请人： Yong-Kyu Kim ,  Tianmin Liu ,  Steven T. Jaffe ,  Christopher H. Strolle

发明人： Yong-Kyu Kim ,  Tianmin Liu ,  Steven T. Jaffe ,  Christopher H. Strolle

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.

公开(公告)号：US5872815A

公开(公告)日：1999-02-16

申请号：US602943

申请日：1996-02-16

申请人： Christopher Hugh Strolle ,  Tianmin Liu ,  Steven Todd Jaffe

发明人： Christopher Hugh Strolle ,  Tianmin Liu ,  Steven Todd Jaffe

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。

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

IPC分类号： H03H7/30 ,  H04L25/02 ,  H04L27/00 ,  H04L25/03

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.

公开(公告)号：US5757855A

公开(公告)日：1998-05-26

申请号：US565608

申请日：1995-11-29

申请人： Christopher Hugh Strolle ,  Tianmin Liu ,  Steven Todd Jaffe

发明人： Christopher Hugh Strolle ,  Tianmin Liu ,  Steven Todd Jaffe

IPC分类号： G11B20/10 ,  G11B20/18 ,  H04L25/03 ,  H04L25/08 ,  H04L25/497 ,  H04L5/12 ,  H04L23/02

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。

公开(公告)号：US5526131A

公开(公告)日：1996-06-11

申请号：US214153

申请日：1994-03-17

申请人： Christopher H. Strolle ,  Steven T. Jaffe ,  Tianmin Liu

发明人： Christopher H. Strolle ,  Steven T. Jaffe ,  Tianmin Liu

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。

公开(公告)号：US20110002242A9

公开(公告)日：2011-01-06

申请号：US10386795

申请日：2003-03-12

申请人： Randall Perlow ,  Nabil Yousef ,  Charles Brooks ,  Tianmin Liu

发明人： Randall Perlow ,  Nabil Yousef ,  Charles Brooks ,  Tianmin Liu

IPC分类号： H04B7/005

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.

摘要翻译： 可以通过经由多径通信信道接收信号来实现稀疏信道均衡。 然后通过从信号中提取关于多路径通信信道的稀疏信息来继续均衡。 这种稀疏信息通常表示通过多路径中的每一条接收到的信号的位置。 然后通过基于稀疏信息估计多路径通信信道的信道响应来继续均衡。 然后通过基于信道响应产生均衡抽头（或系数）来继续均衡。 然后通过基于均衡抽头均衡信号来继续均衡。

公开(公告)号：US20070223563A1

公开(公告)日：2007-09-27

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： H04B1/00

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。

公开(公告)号：US07224726B2

公开(公告)日：2007-05-29

申请号：US10109496

申请日：2002-03-28

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： H04H7/40

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。

公开(公告)号：US07034893B2

公开(公告)日：2006-04-25

申请号：US09923676

申请日：2001-08-06

申请人： Tianmin Liu ,  Randall B. Perlow

发明人： Tianmin Liu ,  Randall B. Perlow

IPC分类号： H04N5/44

CPC分类号： H04N5/4401 ,  H04L1/0045 ,  H04L25/03057 ,  H04L27/06 ,  H04L2025/03426 ,  H04N5/211

摘要： A digital television signal is intercepted by a plurality of antennas to produce a corresponding plurality of input signals. The antennas have different directionality so they can be combined in a way that reduces multipath echoes. In one embodiment, the antennas are arranged to operate in a diversity or scanned array mode. In another embodiment, the antennas are arranged to operate in a adaptive phased array mode. The input signals intercepted by the antenna are subjected to vestigial sideband (VSB) processing to produce a single VSB processed signal, which is decoded to form a display drive signal. A plurality of input signals in a VSB receiver having a plurality of antennas with different directionality are evaluated to determine how the input signals should be combined to reduce multipath echoes. The quality of the input signals from the antennas is evaluated at one of a number of different points in the VSB receiver, such as at the outputs of the antennas, the outputs of the VSB processors, or the output of the forward error correction (FEC) decoder. Within the VSB processors themselves, the quality of the input signals can be evaluated at a number of different points, including the outputs at the front end, the outputs at the back end, or inside the back end the outputs at the feed forward equalizer.