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公开(公告)号：US20160182174A1
公开(公告)日：2016-06-23
申请号：US14910111
申请日：2013-12-18
发明人： John Sidney STEWART
CPC分类号： H04H60/51 , H04H20/67 , H04H20/72 , H04H60/50 , H04N5/4401
摘要： A time reference field is added to an L1 pre-signaling table of a broadcast DVB-T2 signal and location information is added to a Cell List Descriptor of a Network Information Table (NIT) of the broadcast DVB-T2 signal. A DVB-T2 receiver uses the time reference field and the location information from 5 the received broadcast DVB-T2 signal to determine its location.
摘要翻译： 将时间参考字段添加到广播DVB-T2信号的L1预信令表中，并将位置信息添加到广播DVB-T2信号的网络信息表（NIT）的信元列表描述符。 DVB-T2接收机使用来自接收的广播DVB-T2信号的时间参考场和来自5的位置信息来确定其位置。
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公开(公告)号：US06707861B1
公开(公告)日：2004-03-16
申请号：US09427316
申请日：1999-10-26
申请人： John Sidney Stewart
发明人： John Sidney Stewart
IPC分类号： H03D124
CPC分类号： H03J7/04 , H03D7/166 , H04N5/211 , H04N5/4401 , H04N5/455
摘要： A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information and a pilot component includes a carrier recovery network (22; FIG. 3) that produces a demodulated baseband signal. The carrier recovery network additionally responds to a locally generated control signal (Ph. Offset; 360) representing an unwanted phase offset of the pilot signal due to multipath distortion, for example. The control signal is used to compensate for the pilot phase offset before the demodulated signal is equalized. The control signal is produced by correlating received sync values with both a reference sync value (362) and a Hilbert transform of the reference sync value (363). The output of the carrier recovery network signal is phase compensated twice.
摘要翻译： 用于处理包含地面广播高分辨率电视信息和导频分量的VSB调制信号的接收机包括产生解调基带信号的载波恢复网络（22;图3）。 载波恢复网络还例如响应于表示由于多径失真导致的导频信号的不需要的相位偏移的本地产生的控制信号（Ph。Offset; 360）。 控制信号用于在解调信号相等之前补偿导频相位偏移。 通过将接收到的同步值与参考同步值（362）和参考同步值（363）的希尔伯特变换相关联来产生控制信号。 载波恢复网络信号的输出被相位补偿两次。
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3.发明授权公开(公告)号：US06574769B1
公开(公告)日：2003-06-03
申请号：US09581192
申请日：2000-11-15
IPC分类号： H03M1300
CPC分类号： H04L1/0083 , H04L1/0009 , H04L1/0014 , H04L1/0025 , H04L1/0071 , H04L1/0079
摘要： A wireless telephone system comprising a base unit coupleable to one or more external telephone lines and having a base transceiver, and at least one wireless handset. The wireless handset has a handset transceiver for establishing a digital link with the base unit via the base transceiver over a wireless channel, wherein the handset and base unit communicate via the digital link by fixed-size audio packets comprising a plurality of audio data samples and a plurality of error correction bits. Qualities of the digital link are monitored to determine whether a change in error rate occurs. In response to the determination, a packet structure of subsequent audio packets is changed from a first packet structure to a second packet structure to change the relative number of bits devoted to audio data samples and to error correction bits.
摘要翻译： 一种无线电话系统，包括可耦合到一个或多个外部电话线并具有基本收发器的基本单元以及至少一个无线手机。 无线手机具有手机收发器，用于通过无线信道经由基站收发器建立与基本单元的数字链路，其中手持机和基站单元经由数字链路通过包括多个音频数据样本的固定大小的音频分组进行通信， 多个纠错位。 监视数字链路的质量，以确定是否发生错误率的变化。 响应于该确定，后续音频分组的分组结构从第一分组结构改变为第二分组结构，以改变专用于音频数据样本的比特的相对数目和纠错比特。
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4.发明授权System for acquiring and processing video data and program guides transmitted in different coding formats 失效用于获取和处理以不同编码格式发送的视频数据和节目指南的系统
公开(公告)号：US5946052A
公开(公告)日：1999-08-31
申请号：US818592
申请日：1997-03-18
IPC分类号： H04L1/00 , H04L27/00 , H04N5/44 , H04N5/445 , H04N7/08 , H04N7/081 , H04N7/26 , H04N19/00 , H04N5/46
CPC分类号： H04N5/4401 , H04L1/0009 , H04L1/0046 , H04L27/0012 , H04N21/4345 , H04N21/4382 , H04N21/4383 , H04N21/4621 , H04N21/482 , H04N21/6112 , H04N21/4305 , H04N5/445
摘要： A receiver system automatically adaptively tunes to broadcast signals that are variable in the number of channels that are transmitted, their signal coding type and their modulation format. A system receives a digital bitstream representing video information encoded in one of a plurality of different formats, and transmitted on one of a plurality of transmission channels. The system includes a processor for identifying and capturing program guide information including a plurality of channel maps. A channel map associates a transmission channel with a video channel output and the channel map is also associated with an encoding format. The system also includes an adaptive decoder for decoding the bitstream to provide the video channel output in response to the program guide information.
摘要翻译： 接收机系统自动自适应地调谐到发射信道数量可变的广播信号，它们的信号编码类型及其调制格式。 系统接收表示以多种不同格式之一编码的视频信息的数字比特流，并在多个传输信道之一上发送。 该系统包括用于识别和捕获包括多个频道图的节目指南信息的处理器。 频道映射将传输频道与视频频道输出相关联，并且频道映射也与编码格式相关联。 该系统还包括一个自适应解码器，用于解码比特流以响应节目指南信息提供视频信道输出。
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公开(公告)号：US20090197553A1
公开(公告)日：2009-08-06
申请号：US12085418
申请日：2005-12-01
申请人： John Sidney Stewart
发明人： John Sidney Stewart
IPC分类号： H04B1/16
CPC分类号： H04L27/0014 , H04L2027/0034 , H04L2027/0053
摘要： The disclosed embodiments relate to a method and apparatus for determining the frequency offset in a receiver. The apparatus includes a link circuit. The link circuit includes a frequency translator for translating the input signal, a detector for measuring the magnitude of the translated signal, and a controller for determining a maximum value of magnitude of a plurality of magnitudes measured by the detector as a result of controlling the frequency translator. The method includes receiving an input signal, mixing the signal with a plurality of frequencies, processing the plurality of second signals to generate a plurality of magnitudes and a plurality of associated frequency values, and determining a maximum magnitude from the plurality of magnitudes.
摘要翻译： 所公开的实施例涉及用于确定接收机中的频率偏移的方法和装置。 该装置包括链路电路。 链路电路包括用于转换输入信号的频率转换器，用于测量转换信号的大小的检测器，以及用于确定由检测器测量的多个量值的幅度的最大值作为控制频率的结果的控制器 翻译者 该方法包括接收输入信号，将信号与多个频率进行混合，处理多个第二信号以产生多个幅度和多个相关联的频率值，以及从多个幅度确定最大幅度。
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6.发明授权Selective gain adjustment to aid carrier acquisition in a high definition television receiver 有权选择性增益调整，以帮助高清晰度电视接收机中的载波采集公开(公告)号：US06985192B1
公开(公告)日：2006-01-10
申请号：US10031020
申请日：2000-07-13
IPC分类号： H04N5/50
CPC分类号： H04L27/08 , H04L2027/0057 , H04L2027/0087 , H04N5/4401 , H04N5/455 , H04N5/52
摘要： In a receiver for processing a vestigial sideband modulated signal containing terrestrial broadcast high definition television information and a pilot component, and for which multipath interference can lead to significant attenuation within narrow bands of the received signal spectrum containing the pilot tone of an Advanced Television Systems Committee high definition television broadcast signal, it has been found desirable to amplify the input signal in order to achieve synchronization of the receiver's phase-locked loop to the received pilot tone. Once this initial acquisition has been established, the amplification applied to the received signal can be reduced to a level appropriate for remaining blocks in the demodulation chain without upsetting the pilot tone synchronization. Thus, according to the present invention, the gain applied to the received ATSC VSB signal is set higher during pilot tone acquisition than it is during the remaining stages of demodulation.
摘要翻译： 在用于处理包含地面广播高分辨率电视信息和导频分量的残留边带调制信号的接收机中，并且多径干扰可以导致包含高级电视系统委员会的导频音的接收信号频谱的窄带内的显着衰减 高分辨率电视广播信号，已经发现放大输入信号是为了实现接收机的锁相环与所接收的导频音的同步。 一旦建立了该初始采集，则可以将施加到接收信号的放大率减小到适于解调链中的剩余块的电平，而不会使导频音同步失真。 因此，根据本发明，在导频音调获取期间，应用于接收到的ATSC VSB信号的增益比在剩余的解调阶段期间被设置得更高。
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公开(公告)号：US06490007B1
公开(公告)日：2002-12-03
申请号：US09566159
申请日：2000-05-05
IPC分类号： H04N521
CPC分类号： H04N5/211 , H04L25/03038 , H04L2025/03382 , H04L2025/0363 , H04L2025/03687 , H04N5/4401
摘要： In a receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information including data packets, the received signal is converted to a digital signal (19), demodulated (22) and equalized by an adaptive channel equalizer (34). An equalized signal is processed by decoding networks including a Reed-Solomon FEC error detecting and correcting network (44). The equalizer filter coefficient step size is dynamically adjusted during the adaption process as a function of the packet error rate. A local microcontroller (60) monitors the packet error rate at the Reed-Solomon error detector and instructs the equalizer to adjust the coefficient step size in a direction to reduce the packet error rate.
摘要翻译： 在用于处理包含包含数据分组的地面广播高清晰度电视信息的VSB调制信号的接收机中，接收信号被转换成数字信号（19），由自适应信道均衡器（34）解调（22）并均衡。 通过解码包括Reed-Solomon FEC错误检测和校正网络（44）的网络来处理均衡的信号。 均衡器滤波器系数步长在适应过程中作为分组错误率的函数进行动态调整。 本地微控制器（60）监视Reed-Solomon误差检测器的分组错误率，并指示均衡器沿一个方向调整系数步长以减小分组错误率。
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8.发明授权公开(公告)号：US08819518B2
公开(公告)日：2014-08-26
申请号：US12085502
申请日：2005-12-01
申请人： John Sidney Stewart
发明人： John Sidney Stewart
CPC分类号： H03M13/6566 , H03M13/1105 , H03M13/1137
摘要： The disclosed embodiments relate to an apparatus and method for decoding signals in a receiver, such as signals using low density parity check error correction. The apparatus includes a link circuit. The link circuit may include a first memory, a first and second processing block, and also include a first shift circuit for shifting data before entering one of the processing blocks and a second shift circuit for reversing the first shift after exiting the processing block. The link circuit may also include a second memory used for intermediate storage and shared by the first and second processing block. The method includes reading data from a memory, shifting the data prior to processing, processing the data, and then reverse shifting the data prior to writing it back to the memory.
摘要翻译： 所公开的实施例涉及用于对接收机中的信号进行解码的装置和方法，例如使用低密度奇偶校验错误校正的信号。 该装置包括链路电路。 链路电路可以包括第一存储器，第一和第二处理块，并且还包括用于在进入处理块之一之前移位数据的第一移位电路和用于在退出处理块之后反转第一移位的第二移位电路。 链路电路还可以包括用于中间存储并由第一和第二处理块共享的第二存储器。 该方法包括从存储器读取数据，在处理之前移动数据，处理数据，然后在将数据写回存储器之前将数据反向移位。
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公开(公告)号：US07962944B2
公开(公告)日：2011-06-14
申请号：US10055758
申请日：2002-01-23
申请人： John Sidney Stewart
发明人： John Sidney Stewart
IPC分类号： H04N7/173
CPC分类号： H04N21/26275 , H04N7/17318 , H04N21/2543 , H04N21/4147 , H04N21/4334 , H04N21/458 , H04N21/47202 , H04N21/6334 , H04N21/8456 , H04N21/8549
摘要： A method for providing multimedia presentations on demand in a near on demand environment. The method comprises providing beginning segments for pre-recording by subscribers. Each beginning segment corresponds to ones of a plurality of multimedia presentations and each beginning segment has a duration at least as long as a predetermined time interval. Each one of the plurality of multimedia presentations are transmitted concurrently on a plurality of channels with identical presentations transmitted on different channels with start times of each transmission having a periodic interval not exceeding the predetermined time interval.
摘要翻译： 一种在近需要环境下按需提供多媒体演示的方法。 该方法包括提供用户预录录的开始段。 每个起始段对应于多个多媒体呈现中的一个，并且每个起始段具有至少等于预定时间间隔的持续时间。 多个多媒体呈现中的每一个在具有在不同信道上发送的相同呈现的多个信道上同时发送，每个传输的开始时间具有不超过预定时间间隔的周期性间隔。
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公开(公告)号：US20080104474A1
公开(公告)日：2008-05-01
申请号：US11662565
申请日：2005-09-19
申请人： Wen Gao , Kumar Ramaswamy , John Sidney Stewart
发明人： Wen Gao , Kumar Ramaswamy , John Sidney Stewart
CPC分类号： H03M13/616 , H03M13/1105 , H03M13/1111 , H03M13/1137 , H03M13/1165 , H03M13/1168 , H03M13/1185
摘要： A satellite receiver comprises a front-end, demodulator and an LDPC decoder. The front-end receives a DVB-S2 LDPC coded signal and provides a down-converted signal to the demodulator. The latter demodulates the down-converted signal and provides a demodulated signal to the LDPC decoder. The LDPC decoder has a partially parallel architecture and partitions the bit node messages into N/360 groups and the check node messages into q groups, where q=M/360. Each group is processed by 360 bit node processors or 360 check node processors, respectively. Illustratively, the LDPC decoder includes a memory that is partitioned such that messages associated with bit node groups are consecutively addressed. Alternatively, the LDPC decoder includes a memory that is partitioned such that messages associated with check node groups are consecutively addressed.
摘要翻译： 卫星接收机包括前端，解调器和LDPC解码器。 前端接收DVB-S2 LDPC编码信号，并向解调器提供下变频信号。 后者解调下变频信号并向LDPC解码器提供解调信号。 LDPC解码器具有部分并行架构，并将比特节点消息划分为N / 360组，并将校验节点消息分为q组，其中q = M / 360。 每个组分别由360位节点处理器或360个校验节点处理器处理。 说明性地，LDPC解码器包括分区的存储器，使得与位节点组相关联的消息被连续寻址。 或者，LDPC解码器包括被分区的存储器，使得与校验节点组相关联的消息被连续寻址。
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