公开(公告)号：US4752953A

公开(公告)日：1988-06-21

申请号：US895150

申请日：1986-08-11

申请人： Woo H. Paik ,  Jerrold A. Heller ,  Gordon K. Walker

发明人： Woo H. Paik ,  Jerrold A. Heller ,  Gordon K. Walker

IPC分类号： G11B20/10 ,  G11B20/18 ,  H04K1/02 ,  H04N9/802 ,  H04L9/00

CPC分类号： H04N9/802 ,  G11B20/10527 ,  G11B20/1809 ,  H04K1/02

摘要： In a system for scrambling an audio signal for transmission with a video signal having non-video information intervals, an analog audio signal is converted into a scrambled compressed digital audio signal; individual bits from the scrambled compressed digital audio signal are combined to provide 2-bit digital words; each digital word is converted into an 8-bit digital PAM data signal having a binary value bearing a predetermined relationship to the binary value of the converted 2-bit digital word; the 8-bit digital PAM data signal is converted into a 4-level PAM analog signal; and the PAM analog signals are inserted into the non-video information intervals of the video signal for transmission. A descrambling system descrambles the 4-level PAM analog signals by a complementary scheme.

摘要翻译： 在具有用于具有非视频信息间隔的视频信号进行发送的音频信号加扰的系统中，模拟音频信号被转换成加扰的压缩数字音频信号; 来自加扰的压缩数字音频信号的各个比特被组合以提供2比特的数字字; 每个数字字被转换成具有与转换的2位数字字的二进制值具有预定关系的二进制值的8位数字PAM数据信号; 8位数字PAM数据信号被转换为4级PAM模拟信号; 并将PAM模拟信号插入视频信号的非视频信息间隔中进行传输。 解扰系统通过互补方案解扰4电平PAM模拟信号。

公开(公告)号：US4608456A

公开(公告)日：1986-08-26

申请号：US498824

申请日：1983-05-27

申请人： Woo H. Paik ,  Jerrold A. Heller ,  Gordon K. Walker

发明人： Woo H. Paik ,  Jerrold A. Heller ,  Gordon K. Walker

IPC分类号： G11B20/10 ,  G11B20/18 ,  H04B14/04 ,  H04K1/02 ,  H04N7/167 ,  H04N9/802 ,  H04M1/70

CPC分类号： G11B20/10527 ,  G11B20/1809 ,  H04K1/02 ,  H04N9/802

摘要： In the scrambling system, an analog audio signal is converted into a digital signal to provide a sequence of digital signal samples corresponding to the analog audio signal. Each digital signal sample is compressed to provide compressed signal samples having a sign bit, three exponent bits and seven mantissa bits. Each bit of each compressed signal sample is exclusive-OR'd with a unique keystream to thereby scramble the audio signal. A Hamming code generator generates code bits for correcting singular errors in a combination of the sign bit, the exponent bits and the code bits; and a parity bit generator generates a parity bit for detecting double errors in a combination of the sign bit, the exponent bits and the code bits and for further detecting an error in the most significant mantissa bit and/or the parity bit. The bits from a plurality of successive compressed, error-encoded signal samples are interleaved and serialized in order to separate the bits from any single sample by at least a predetermined duration associated with an FM discriminator click. The serialized, interleaved, error-encoded, compressed signal samples are combined to provide two-bit digital words. The digital words are converted to digital PAM data signals which when converted to an analog signal by digital-to-analog conversion, provide a pulse-amplitude-modulated signal having a level related to the binary value of the digital words. The digital PAM data signals are converted to an analog signal to provide the pulse-amplitude-modulated signal. The descrambler system descrambles the scrambled audio signal by a process that is the converse of the scrambling process. Singular errors in a scrambled signal sample are detected and corrected by a Hamming error corrector. Double errors in a scrambled signal sample are detected by a parity bit check and compensated for by repeating the last received error free signal sample.

摘要翻译： 在加扰系统中，模拟音频信号被转换成数字信号以提供对应于模拟音频信号的一系列数字信号采样。 每个数字信号样本被压缩以提供具有符号位，三个指数位和七个尾数位的压缩信号样本。 每个压缩信号采样的每个位都与独有的密钥流进行异或运算，从而对音频信号进行加扰。 汉明码发生器产生用于在符号位，指数位和码位的组合中纠正奇异误差的码位; 并且奇偶校验位发生器产生用于在符号位，指数位和代码位的组合中检测双重误差的奇偶校验位，并且用于进一步检测最高有效尾数位和/或奇偶校验位中的误差。 来自多个连续压缩的，错误编码的信号样本的比特被交错和串行化，以便将与任何单个样本的比特分开至少一个与FM鉴别器点击相关联的预定持续时间。 串行化，交错的，错误编码的压缩信号样本被组合以提供两位数字字。 数字字被转换为数字PAM数据信号，当通过数模转换转换为模拟信号时，提供具有与数字字的二进制值相关的电平的脉冲幅度调制信号。 数字PAM数据信号被转换为模拟信号以提供脉冲幅度调制信号。 解扰器系统通过与加扰过程相反的过程来解扰加扰的音频信号。 加扰信号样本中的奇异误差由汉明误差校正器检测和校正。 通过奇偶校验位检查来检测加扰信号样本中的双重误差，并通过重复最后接收的无错误信号样本进行补偿。

公开(公告)号：US5313215A

公开(公告)日：1994-05-17

申请号：US911460

申请日：1992-07-10

申请人： Gordon K. Walker ,  John K. Taylor

发明人： Gordon K. Walker ,  John K. Taylor

IPC分类号： H01Q1/12 ,  H01Q3/00 ,  H04B7/185

CPC分类号： H01Q1/1257 ,  H01Q3/005

摘要： A satellite identification system for identifying a communications satellite from which a broadcast communication signal is being received by an antenna, wherein the communication signal includes data identifying a programmer that broadcast the communication signal and/or an uplink location from which the communication signal is broadcast. The system includes a memory storing a look-up table correlating satellite identification data for a plurality of satellites with the programmer identification data and/or the uplink location data for the plurality of satellites; means for detecting the programmer identification data and/or the uplink location data from a communication signal received by the antenna from one of the plurality of satellites; and means for accessing the look-up table in response to the detected programmer identification data and/or the uplink location data to retrieve the satellite identification data for the satellite from which the communication signal is received. The satellite identification system is included in a satellite antenna alignment system for automatically identifying reference satellites. The satellite antenna alignment system also automatically aligns the antenna to a position at which optimum quality is achieved for a communication signal received from a reference satellite; and the alignment positions of the antenna are measured and stored for at least two reference satellites to which the antenna is automatically aligned. Current correlated data is provided in the look-up tables by detecting updated correlated data in a communication signal received by the antenna and loading the updated correlated data into the look-up tables.

摘要翻译： 一种用于识别通过天线正在接收广播通信信号的通信卫星的卫星识别系统，其中通信信号包括识别广播通信信号的编程器和/或广播通信信号的上行链路位置的数据。 该系统包括：存储器，用于存储将多个卫星的卫星识别数据与用于多个卫星的编程器标识数据和/或上行链路位置数据相关联的查找表; 用于从所述天线从所述多个卫星之一接收的通信信号中检测所述编程器识别数据和/或所述上行链路位置数据的装置; 以及用于响应于检测到的编程器标识数据和/或上行链路位置数据访问查找表的装置，以检索用于从其接收通信信号的卫星的卫星识别数据。 卫星识别系统包括在卫星天线对准系统中，用于自动识别参考卫星。 卫星天线对准系统还自动将天线对准到从参考卫星接收的通信信号达到最佳质量的位置; 并测量和存储天线的对准位置，用于天线自动对准的至少两个参考卫星。 通过检测由天线接收的通信信号中的更新的相关数据并将更新的相关数据加载到查找表中，在查找表中提供当前相关数据。

公开(公告)号：US20100260266A1

公开(公告)日：2010-10-14

申请号：US12756922

申请日：2010-04-08

申请人： RALPH A. GHOLMIEH ,  Gordon K. Walker

发明人： RALPH A. GHOLMIEH ,  Gordon K. Walker

IPC分类号： H04N11/02

CPC分类号： H04L1/0075 ,  H04L1/005 ,  H04L1/0065 ,  H04L1/0066

摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media for encoding data for transmission on a communication link of a content delivery system includes: receiving data to be communicated to a device, the data received as a multiple data link layer packets of a logical channel carrying broadcast data; encoding the multiple data link layer packets of the logical channel as one outer codeword using an outer code at an outer code rate; encoding symbols of the outer codeword with an inner code; and indicating the outer code and the outer code rate through signaling, including setting a first value for a first field of a control channel and setting a second value for a second field of the control channel, wherein the first value is determined by the outer code, and the second value is determined by the outer code rate.

摘要翻译： 方法，系统和装置，包括在计算机存储介质上编码的用于编码数据以在内容传送系统的通信链路上传输的计算机程序包括：接收要传送到设备的数据，作为多个数据链路层分组 携带广播数据的逻辑信道; 使用外部码率的外部码将所述逻辑信道的多个数据链路层分组编码为一个外部码字; 用内码对外码字的码元进行编码; 以及通过信令指示外部码和外部码率，包括为控制信道的第一字段设置第一值并为控制信道的第二字段设置第二值，其中第一个值由外部码 ，第二个值由外码率决定。

公开(公告)号：US08355354B2

公开(公告)日：2013-01-15

申请号：US12646520

申请日：2009-12-23

申请人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon K. Walker ,  Murali R. Chari ,  Ashok Mantravadi ,  Anand D. Subramaniam

发明人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon K. Walker ,  Murali R. Chari ,  Ashok Mantravadi ,  Anand D. Subramaniam

IPC分类号： H04H20/71

CPC分类号： H04L5/0041 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L12/189 ,  H04W72/005

摘要： To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.

摘要翻译： 为了在无线广播网络中广播具有不同层次的不同类型的传输，每个基站根据第一模式（或编码和调制方案）处理广域传输的数据，以产生广域的数据符号 根据第二模式传输和处理用于本地传输的数据，以产生用于本地传输的数据符号。 分别基于广域和本地传输的期望覆盖来选择第一和第二模式。 基站还为本地和广域传输生成导频和开销信息。 用于本地和广域传输的数据，导频和开销信息被复用到它们的传输跨度，其可以是不同组的频率子带，不同时间段或不同时间段中的不同子带组。 多于两种不同类型的传输也可以被复用和广播。

公开(公告)号：US4809274A

公开(公告)日：1989-02-28

申请号：US091911

申请日：1987-09-04

申请人： Gordon K. Walker ,  Ron D. Katznelson ,  Paul Moroney ,  Karl E. Moerder

发明人： Gordon K. Walker ,  Ron D. Katznelson ,  Paul Moroney ,  Karl E. Moerder

IPC分类号： H04B14/04 ,  H03G7/00 ,  H03K7/02 ,  H03M20060101 ,  H03M7/30 ,  H04B1/64 ,  H04B15/00 ,  H04H20/88 ,  H04L1/08 ,  G06F11/10

CPC分类号： H03G7/007 ,  H03M7/3053

摘要： A system for companding digital audio signal samples processes the digital audio signal samples to correct errors induced by the compression and expansion processes. These errors are calculated prior to compressing the samples. Such errors are calculated in accordance with a predetermined compression process and a predetermined expansion process; and the digital audio signal samples are corrected in accordance with such calculations prior to compression. The compression process includes providing a 3-bit gain word for a block of 70 samples. The gain word is computed in accordance with the position of the most significant "1" bit in the sample(s) having the peak magnitude. Each individual sample is processed in accordance with the block gain word to compress the sample by reducing the number of magnitude bits. The error calculation process includes calculating an error signal by subtracting a calculated reproduced digital audio signal sample from the digital audio signal sample to be compressed, filtering the error signal by noise-spectral filtering and adding the filtered error signal to the next-providing digital audio signal sample to provide a corrected digital audio signal sample for compression. The error calculation process also includes calculating an error value based upon the effect of using a single gain word for compressing a block of samples. The error value is subtracted from the corrected digital audio signal sample prior to compression. The gain word is forward error corrected by (5,1) encoding to enable detection and correction of both single-bit and double-bit errors in transfer by majority voting. The sign bit and the most significant magnitude bits of the compressed samples are forward error corrected to enable detection and correction of single-bit errors in transfer and to enable detection and concealment of double-bit errors in transfer.

摘要翻译： 用于压缩数字音频信号样本的系统处理数字音频信号样本以校正由压缩和扩展过程引起的误差。 在压缩样品之前计算这些误差。 这样的误差根据预定的压缩处理和预定的扩展处理来计算; 并且在压缩之前根据这样的计算校正数字音频信号样本。 压缩过程包括为70个样本的块提供3位增益字。 根据具有峰值幅度的采样中最高有效“1”位的位置来计算增益字。 根据块增益字来处理每个单独的样本，以通过减少幅度比特数来压缩样本。 误差计算处理包括通过从要压缩的数字音频信号样本中减去计算出的再现数字音频信号样本来计算误差信号，通过噪声频谱滤波对误差信号进行滤波，并将滤波后的误差信号加到下一个提供的数字音频 信号采样以提供用于压缩的校正数字音频信号样本。 误差计算处理还包括基于使用单个增益字来压缩采样块的效果来计算误差值。 在压缩之前从校正的数字音频信号样本中减去误差值。 增益字是通过（5,1）编码进行前向误差校正，以便通过多数表决来传输单位和双位错误的检测和校正。 压缩样本的符号位和最高有效幅度位是前向纠错的，以便能够检测和校正传输中的单位错误，并能够检测和隐藏传输中的双位错误。

公开(公告)号：US5463403A

公开(公告)日：1995-10-31

申请号：US180574

申请日：1994-01-12

申请人： Gordon K. Walker ,  Paul Moroney

发明人： Gordon K. Walker ,  Paul Moroney

IPC分类号： H04B1/18 ,  H01Q1/12 ,  H01Q3/00 ,  H04B1/10 ,  H04B1/16 ,  H04H20/00

CPC分类号： H01Q1/125 ,  H01Q3/005 ,  H04B1/1027 ,  H04B1/16

摘要： Alignment of an antenna and a polarizer for the antenna are automatically adjusted and the frequency setting of a frequency-tunable receiver is automatically adjusted while receiving a broadcast communication signal that is forward-error-correction coded by processing the forward-error-correction code of the received signal to measure a channel-bit-error-rate-affected parameter for the received signal; by realigning the antenna and the polarizer from their respective initial positions in response to the measured parameter until the measured parameter is minimized; and by retuning the receiver from its initial frequency setting in response to the measured parameter until the measured parameter is minimized. A Viterbi decoder processes the forward-error-correction code of the received signal to compute path metrics affected by the bit-error rate of the received signal and normalizes the computed path metrics; and a counter counts the normalizations over fixed intervals to measure a path metric normalization rate as the measured parameter.

摘要翻译： 自动调整用于天线的天线和偏振器的对准，并且在接收通过处理前向纠错码的前向纠错编码的广播通信信号的同时自动调整频率可调接收机的频率设置 所接收的信号用于测量接收信号的信道 - 比特误码率影响参数; 通过响应于测量的参数将天线和偏振器从其各自的初始位置重新对准，直到测量的参数最小化; 并且通过响应于测量的参数将接收器从其初始频率设置重新调度，直到所测量的参数被最小化。 维特比解码器处理接收信号的前向纠错码以计算受接收信号的误码率影响的路径度量，并对计算出的路径量度进行归一化; 并且计数器对固定间隔的归一化进行计数，以测量路径度量标准化率作为测量参数。

公开(公告)号：US4736420A

公开(公告)日：1988-04-05

申请号：US909763

申请日：1986-09-19

申请人： Ron D. Katznelson ,  Gordon K. Walker ,  Paul Moroney

发明人： Ron D. Katznelson ,  Gordon K. Walker ,  Paul Moroney

IPC分类号： H04K1/06 ,  H04N7/169 ,  H04N7/167

CPC分类号： H04N7/1696

摘要： A system for scrambling a video signal having a plurality of horizontal lines, each of which includes a video information portion and a non-video information portion. The scrambling system includes a memory; means for storing the video information portion of each video signal line in the memory; and means for forming scrambled horizontal lines by retrieving each of a plurality of said stored video information lines in a plurality of segments preceded by a non-video segment and separated by non-video segment(s). The retrieval means include means for varying the respective durations of the retrieved video information segments in individual scrambled horizontal lines in accordance with an encryption keystream; and means for varying the total duration of the non-video segments for individual scrambled horizontal lines in accordance with a predetermined timing pattern. A complementary descrambling system also is disclosed.

摘要翻译： 一种用于对具有多个水平行的视频信号进行加扰的系统，每个水平行包括视频信息部分和非视频信息部分。 加扰系统包括存储器; 用于将每个视频信号线的视频信息部分存储在存储器中的装置; 以及用于通过在由非视频段前面并由非视频段分隔的多个段中检索多个所述存储的视频信息行中的每一个来形成加扰的水平线的装置。 检索装置包括用于根据加密密钥流改变检索到的各个加扰水平行中的视频信息段的持续时间的装置; 以及用于根据预定定时模式改变针对各个加扰水平线的非视频段的总持续时间的装置。 还公开了补充解扰系统。

公开(公告)号：US08655294B2

公开(公告)日：2014-02-18

申请号：US12787062

申请日：2010-05-25

申请人： Gordon K. Walker ,  Murali R. Chari ,  Fuyun Ling

发明人： Gordon K. Walker ,  Murali R. Chari ,  Fuyun Ling

IPC分类号： H04B1/16

CPC分类号： H04L27/2688 ,  H04L1/20 ,  H04L25/0216 ,  H04L27/2665 ,  H04L27/2695

摘要： Methods and circuits for positioning a signal sampling window within a wireless receiver device for use in a multi-transmitter wireless broadcast network include generating a long channel model based upon a signal identifying transmitters that can be processed without aliases, and positioning the signal sampling window based upon the long channel model. For example, in a MediaFLO® broadcast, the long channel model may be generated by receiving positioning pilot channel (PPC) signals. Positions for the signal sampling window may be determined by identifying hypothetical signal sampling window positions, calculating signal to interference and noise ratio (SINR) values for each identified hypothetical, and selecting the hypothetical with the best SINR. Using a long channel model to position the signal sampling window may provide improved window placement, reduce destructive aliasing, and reduce a time guard in the window placement. The long channel model may be used in conjunction with terrain databases.

摘要翻译： 用于在无线接收机设备内定位用于多发射机无线广播网络中的信号采样窗口的方法和电路包括基于识别可以在没有别名的情况下被处理的发射机的信号来生成长信道模型，并且基于信号采样窗口 在长渠道模式。 例如，在MediaFLO广播中，可以通过接收定位导频信道（PPC）信号来生成长信道模型。 信号采样窗口的位置可以通过识别假设信号采样窗口位置，为每个识别的假设计算信号与干扰和噪声比（SINR）值并选择具有最佳SINR的假设来确定。 使用长通道模型来定位信号采样窗口可以提供改进的窗口放置，减少破坏性混叠，并减少窗口位置中的时间守卫。 长通道模型可以与地形数据库结合使用。

公开(公告)号：US20110085499A1

公开(公告)日：2011-04-14

申请号：US12876962

申请日：2010-09-07

申请人： KRISHNA K. MUKKAVILLI ,  Ralph A. Gholmieh ,  Durk L. van Veen ,  Raghuraman Krishnamoorthi ,  Neville J. Meijers ,  Gordon K. Walker

发明人： KRISHNA K. MUKKAVILLI ,  Ralph A. Gholmieh ,  Durk L. van Veen ,  Raghuraman Krishnamoorthi ,  Neville J. Meijers ,  Gordon K. Walker

IPC分类号： H04W40/00

CPC分类号： H04H20/30 ,  H04H60/91 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/2389 ,  H04N21/435 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/4385 ,  H04W72/005 ,  H04W72/1273

摘要： A system for transmitting a data stream, includes a transmitter for broadcasting a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein, and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe. A system for receiving data includes a receiver configured to receive a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein; and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe.

摘要翻译： 一种用于发送数据流的系统，包括：发射机，用于广播包括至少一个其中编码的至少一个第一数据流的超帧的射频通信信号和在该超帧中承载的开销信息，所述开销信息包括控制信道， 控制信道具有用于将至少一个第一数据流与在至少一个超帧中编码的任何其他数据流分离的控制信道信息。 一种用于接收数据的系统包括：接收机，被配置为接收射频通信信号，所述射频通信信号包括至少一个其中编码有至少第一数据流的超帧; 以及在所述超帧中承载的开销信息，所述开销信息包括控制信道，所述控制信道具有用于将所述至少一个第一数据流与在所述至少一个超帧中编码的任何其它数据流分离的控制信道信息。