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1.发明授权
公开(公告)号：US5739874A
公开(公告)日：1998-04-14
申请号：US579782
申请日：1995-12-28
IPC分类号： H04N5/44 , H03J1/00 , H03J7/02 , H03L7/107 , H04B1/26 , H04N5/455 , H04N5/46 , H04N5/50 , H04N7/20
CPC分类号： H03L7/0805 , H03J1/005 , H03L7/107
摘要： An economical tuning system for a digital satellite television receiver includes a phase locked loop (PLL) tuning control IC of the which is normally used in a tuning system of a conventional terrestrial broadcast or cable television reciever to control the frequency of the local oscillator (LO). Unfortunately, the PLL IC is only capable of changing the frequency of the LO in relatively large steps. As a result, the operation of a carrier recovery loop which demodulates the digitally encoded IF signal produced by the tuner may be interrupted during a fine tuning mode because the carrier recovery loop may not be able to track frequency changes of the LO. To reduce such possibility, the integrator filter associated with the PLL IC is modified to decrease the rate of change of the LO frequency during the fine tuning mode.
摘要翻译： 用于数字卫星电视接收机的经济调谐系统包括锁相环（PLL）调谐控制IC，其通常用于常规地面广播或有线电视接收机的调谐系统中，以控制本地振荡器（LO ）。 不幸的是，PLL IC只能在相对较大的步骤中改变LO的频率。 因此，由于载波恢复环路可能无法跟踪LO的频率变化，所以在微调模式期间，解调由调谐器产生的数字编码的IF信号的载波恢复环路的操作可能被中断。 为了减少这种可能性，修改了与PLL IC相关联的积分滤波器，以在微调模式期间降低LO频率的变化率。
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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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3.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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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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6.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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7.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：US20090310624A1
公开(公告)日：2009-12-17
申请号：US11919199
申请日：2006-03-29
CPC分类号： H04B1/18
摘要： The disclosed embodiments relate to a system and method for receiving multiple channels in a communications receiver. The system includes a first module further including an analog to digital converter for converting an input signal to a first and second digital signal and a first processor for processing the first digital signal, and a second module further including a second processor to process the second digital signal. The method involves receiving an analog signal, converting the analog signal to a first and second digital signal, passing the first digital signal through a first interface, processing the first digital signal to a produce a first plurality of output signals, passing the second digital signal through a second interface, and processing the second digital signal to produce a second plurality of output signals.
摘要翻译： 所公开的实施例涉及用于在通信接收机中接收多个信道的系统和方法。 该系统包括第一模块，其还包括用于将输入信号转换为第一和第二数字信号的模数转换器和用于处理第一数字信号的第一处理器，以及第二模块，还包括第二处理器，以处理第二数字信号 信号。 该方法包括接收模拟信号，将模拟信号转换为第一和第二数字信号，使第一数字信号通过第一接口，处理第一数字信号以产生第一多个输出信号，使第二数字信号 通过第二接口，并处理第二数字信号以产生第二多个输出信号。
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公开(公告)号：US07263141B1
公开(公告)日：2007-08-28
申请号：US09391059
申请日：1999-09-07
CPC分类号： H03M13/256 , H03M13/3776 , H03M13/3961 , H03M13/4107 , H03M13/4169 , H03M13/6508
摘要： A trellis decoder system uses a feed-forward trellis demapping configuration to prevent error propagation. In a system for processing encoded binary data symbols representable as a symbol constellation, a decoder includes a delay for delaying received encoded symbol data. The decoder also includes a re-encoder for re-coding decoded symbol representative data and a processor for deriving decoded symbol data. The processor derives decoded symbol data using the delayed encoded symbol data and re-encoded data representative of a difference between successive symbols computed using an error propagation-free, feed-forward configuration.
摘要翻译： 网格解码器系统使用前馈网格解映射配置来防止错误传播。 在用于处理可表示为符号星座的编码二进制数据符号的系统中，解码器包括用于延迟接收的编码符号数据的延迟。 解码器还包括用于重新编码解码的符号代表数据的重新编码器和用于导出解码符号数据的处理器。 处理器使用延迟编码的符号数据和代表使用无差错传播的前馈配置计算的连续符号之间的差异的重新编码的数据来导出解码的符号数据。
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10.发明授权公开(公告)号：US07102692B1
公开(公告)日：2006-09-05
申请号：US10089904
申请日：2000-10-11
IPC分类号： H03M1/12
CPC分类号： H04N5/4401 , H04N5/06 , H04N5/126 , H04N5/46 , H04N7/088 , H04N9/64 , H04N9/642 , H04N21/4305 , H04N21/4307 , H04N21/4316 , H04N21/4622
摘要： A digital and analog television signal digitization and processing device that performs the digitization and processing functions using a common reference frequency source that is used to generate multiple subclock signals, wherein the reference frequency source is independent of any synchronizing characteristic of the input signal. For dual channel analog signal processing, the common frequency source is not locked to either channel/input signal. Digital signal processing is accomplished based on the same common reference frequency source. Advantageously, the present invention allows all of the analog-to-digital converters and decoder circuitry/logic necessary for simultaneously digitizing and processing several analog and digital television signals to be integrated on a single integrated circuit as well as eliminating duplicate frequency generation circuits.
摘要翻译： 一种数字和模拟电视信号数字化处理装置，其使用用于产生多个副时钟信号的公共参考频率源来执行数字化和处理功能，其中参考频率源与输入信号的任何同步特性无关。 对于双通道模拟信号处理，公共频率源不被锁定到任一通道/输入信号。 基于相同的公共参考频率源实现数字信号处理。 有利地，本发明允许将同时数字化和处理若干模拟和数字电视信号所需的所有模数转换器和解码器电路/逻辑集成在单个集成电路上以及消除重复的频率产生电路。
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