专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US09154851B2 Tunable RF return path filter with automatic channel plan detection 有权
标题翻译：可调谐射频返回路径滤波器，具有自动信道计划检测功能
公开(公告)号：US09154851B2
公开(公告)日：2015-10-06
申请号：US13293541
申请日：2011-11-10
申请人： David B. Bowler , John Holobinko
发明人： David B. Bowler , John Holobinko
IPC分类号： H04N7/173 , H04N21/61 , H04H60/43 , H04H60/97 , H04L27/00 , H04N7/10 , H04N21/437 , H04N21/442 , H04L12/28 , H04N21/24
CPC分类号： H04N21/6168 , H04H60/43 , H04H60/97 , H04L12/2801 , H04L27/0006 , H04N7/104 , H04N7/173 , H04N21/2408 , H04N21/437 , H04N21/44245
摘要： A method and computing device that provides a tunable RF filter for a two-way communication system. The method receives a downstream video signal, and filters the downstream video signal into at least one downstream bandwidth band, each downstream bandwidth band related to desired upstream/downstream bandwidth splits. The method performs an energy detection on each downstream bandwidth band, and determines a lowest frequency of said at least one downstream bandwidth band that contains downstream video content. The method sets a diplex filter upstream/downstream frequency cutoff to a maximum upstream bandwidth that does not conflict with the lowest frequency of said at least one downstream bandwidth band that contains downstream video content.
摘要翻译：一种为双向通信系统提供可调谐RF滤波器的方法和计算设备。该方法接收下行视频信号，并且将下游视频信号滤波成至少一个下行带宽带，每个下行带宽带与期望的上行/下行带宽分离相关。该方法对每个下行带宽频带执行能量检测，并且确定包含下游视频内容的所述至少一个下行带宽带的最低频率。该方法将上行/下行频率截止的双工滤波器设置为不与包含下游视频内容的所述至少一个下行带宽频带的最低频率冲突的最大上行带宽。

2. 发明授权

US5943047A Two-way information transmission system, two-way information transmission method and subscriber terminal device 失效
标题翻译：双向信息传输系统，双向信息传输方式和用户终端设备
公开(公告)号：US5943047A
公开(公告)日：1999-08-24
申请号：US824488
申请日：1997-03-27
申请人： Mitsuhiro Suzuki
发明人： Mitsuhiro Suzuki
IPC分类号： H04H20/33 , H04H20/69 , H04H20/76 , H04H20/79 , H04H60/04 , H04H60/97 , H04N7/173 , H04N7/22 , H04N21/226 , H04N21/258 , H04N21/262 , H04N21/472 , H04N7/10 , H04N7/14
CPC分类号： H04N7/17309 , H04H20/33 , H04H20/69 , H04H20/76 , H04H20/79 , H04H60/04 , H04H60/97
摘要： The subscriber terminal ms sends the demand including at least information for identifying the demand subscriber terminal, information for identifying the requested information, and information relating to the urgency of the requested information to the information distribution transmission center HE through an going-up line. The information distribution transmission center HE plans a transmission schedule of the information to be transmitted based on the demand from the subscriber terminal ms, and transmits the transmission schedule information included in the down-going control data to the subscriber terminal which sent the demand prior to the actual transmission, and transmits the requested information according to the above-mentioned transmission schedule. The subscriber terminal ms receives and analyzes the down-going control data from the information distribution transmission center HE and is informed of the transmission schedule, and acquires the information to be transmitted based on the obtained transmission plan, stores the acquired information in a large scale memory, and reads the information from the memory means for use. A video on-demand system can be realized without introducing a large scale system such as video server and with a relatively small investment, and the centralization of traffic is mitigated, and the network resource is used efficiently.
摘要翻译：订户终端ms通过上行线路将至少包括用于识别需求用户终端的信息，用于识别所请求信息的信息和与请求信息的紧急性有关的信息发送到信息分发传输中心HE。信息分发传输中心HE根据来自用户终端ms的需求来计划要发送的信息的传输调度，并将包含在下行控制数据中的传输调度信息发送给发送请求之前的用户终端实际发送，并根据上述发送调度发送所请求的信息。用户终端ms接收并分析来自信息分发传输中心HE的下行控制数据，并通知传输时间表，并且基于获得的传输计划获取要发送的信息，大量存储所获取的信息存储器，并从存储器装置读取信息以供使用。可以实现视频点播系统，而不需要引入诸如视频服务器的大规模系统，投资相对较小，并且减轻流量集中，有效利用网络资源。

3. 发明授权

US5930231A Block spectrum receiver for a broadband communications system 失效
标题翻译：用于宽带通信系统的频谱接收机
公开(公告)号：US5930231A
公开(公告)日：1999-07-27
申请号：US625399
申请日：1996-03-27
申请人： Kevin L. Miller , Ramin Borazjani
发明人： Kevin L. Miller , Ramin Borazjani
IPC分类号： H04N7/10 , H04B1/26 , H04H20/34 , H04H20/42 , H04H20/79 , H04H20/80 , H04H40/27 , H04H60/97 , H04J11/00 , H04L5/02 , H04L5/14 , H04L7/02 , H04L12/28 , H04M3/00 , H04M7/00 , H04M7/12 , H04M9/02 , H04N7/173 , H04J1/00 , H04J3/16
CPC分类号： H04H20/80 , H04H20/34 , H04H20/42 , H04H20/79 , H04H40/27 , H04H60/97 , H04L12/2801 , H04L5/023 , H04L5/143 , H04M7/006 , H04N7/10 , H04N7/17309 , H04L7/0062 , H04M7/12 , H04M9/027
摘要： A communication system for coupling telephony or other signals to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers upstream to a headend unit (HIU) are modulated onto the reverse band of the broadband network in a frequency division multiple access (FDMA) arrangement. The upstream modulated telephony signals are received at a telephony network interface at the HIU coupled to the broadband network. A group of reverse band modulated telephony signals are received at a group receiver or channelizer. The group receiver processes all upstream telephony signals within a selected spectral subband in the reverse band to apply a receiver matched filter with a weighted overlap and add circuit, and are then converted to baseband by an FFT circuit. The group receiver provides a serial data stream representing the baseband telephony signals. The baseband telephony signals are processed to derive demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.
摘要翻译：用于将电话或其他信号耦合到诸如CATV网络的宽带网络的通信系统。该系统在宽带网络的前向频带中发送电话信号的复用，其中各个信号被定向到寻址的用户。从用户上游返回到前端单元（HIU）的电话信号在频分多址（FDMA）布置中被调制到宽带网络的反向频带上。在耦合到宽带网络的HIU处的电话网络接口处接收上行调制电话信号。一组反向频带调制电话信号在组接收机或信道发送器处被接收。组接收机处理反向频带内所选择的频谱子带内的所有上行电话信号，以将具有加权重叠和相加电路的接收机匹配滤波器应用于FFT电路。组接收器提供表示基带电话信号的串行数据流。处理基带电话信号以导出解调的电话信号。解调的电话信号耦合到电话网络。

4. 发明授权

US5917810A Two-way multiple access communication system, and a central station and a user station for use in such a system 失效
标题翻译：双向多址通信系统，以及用于这种系统的中心站和用户站
公开(公告)号：US5917810A
公开(公告)日：1999-06-29
申请号：US767460
申请日：1996-12-16
申请人： Paulus G. M. De Bot
发明人： Paulus G. M. De Bot
IPC分类号： H04N7/08 , H04H20/38 , H04H20/79 , H04H60/91 , H04H60/96 , H04H60/97 , H04L12/28 , H04N7/081 , H04N7/16 , H04N7/173 , H04N21/21 , H04N21/23 , H04Q7/24 , H04Q7/38 , H04J3/00
CPC分类号： H04H20/38 , H04H60/96 , H04L12/2801 , H04N21/21 , H04N21/23 , H04N7/165 , H04N7/17309 , H04H20/79 , H04H60/91 , H04H60/97
摘要： A CATV system (1) operating as a two-way multiple access communication system in which a plurality of user stations (US1 to US5) communicate with a central station (CS) which can provide video programs. The system (1) can be an interactive TV system in which the user stations (US1 to US5) can order a specific program, or can respond to multiple choice questions in a program, or the like. For exchanging session accompanying information between the central station (CS) and the user stations (US1 to US5) a common control channel is provided. For true interactivity in high capacity and high user density systems, session accompanying control information is exchanged between the central station (CS) and the user stations (US1 to US5) via dedicated control channels (DSCS, USCS). Such a system (1) satisfies the needs of all kinds of multi-media systems, interactivity being an important feature in such systems.
摘要翻译：作为双向多址通信系统的CATV系统（1），其中多个用户站（US1至US5）与可以提供视频节目的中心站（CS）通信。系统（1）可以是交互式电视系统，其中用户站（US1至US5）可以订购特定节目，或者可以对节目中的多项选择题作出反应等。为了在中心站（CS）和用户站（US1至US5）之间交换伴随信息，提供公共控制信道。为了在高容量和高用户密度系统中实现真正的交互性，通过专用控制信道（DSCS，USCS）在中心站（CS）和用户站（US1至US5）之间交换伴随的控制信息。这种系统（1）满足各种多媒体系统的需要，交互性是这种系统的重要特征。

5. 发明授权

US5793759A Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes 失效
标题翻译：使用正交循环码通过视频电缆进行数字数据传输的装置和方法
公开(公告)号：US5793759A
公开(公告)日：1998-08-11
申请号：US588650
申请日：1996-01-19
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H03M13/25 , H03M13/41 , H04B1/707 , H04B7/26 , H04H60/97 , H04J3/06 , H04J11/00 , H04J13/00 , H04J13/18 , H04J14/00 , H04L5/02 , H04L5/06 , H04L7/04 , H04L12/28 , H04L12/56 , H04L25/03 , H04L27/36 , H04N7/173 , H04B1/69 , H04B7/216
CPC分类号： H04W48/16 , H04B1/707 , H04J13/00 , H04J13/004 , H04J13/18 , H04J3/0608 , H04J3/0682 , H04L12/2801 , H04L25/03343 , H04L27/362 , H04L5/023 , H04L5/026 , H04L5/06 , H04N7/10 , H04N7/17309 , H04B2201/709709 , H04B7/2668 , H04H60/97 , H04J14/007 , H04L2025/03414 , H04L7/041 , H04W28/24 , H04W28/26 , H04W4/18 , H04W74/0866
摘要： A method and apparatus for carrying out synchronous co-division multiple access (SCDMA,) communication of multiple channels of digital data over a shared transmission media such as a cable television system coaxial cable, a fiber optic or copper conductor telephone link, terrestial microwave, satellite link, local or wide area network, wireless including cellur network or some combination of these media using suitable interface circuitry. The system includes modems at remote units and a central unit to receive time division multiplexed digital data arranged into timeslots or channels and uses orthogonal codes to encode each channel of multiple data and spread the energy of each channel data over a frame of data transmitted in the code domain. Spreading the data this way makes the system less susceptible to impulse noise. Frames are synchronized as between remote and central units using a ranging scheme which is also useful in any other system transmitting data by frames in a distributed system where synchronizing the frames as between all units regardless of differences in propagation delays is necessary. Each frame in the SCDMA modulation scheme includes a gap or guardband containing no other data. The ranging process involves training each remote unit to impose enough delay prior to re-transmission of a barker code received from the CU such that a barker code sent by the RU arrives at the CU during the gap. The process of setting the delay in each RU is a trial and error process, and each RU starts the ranging process asynchronously. Contention resolution protocols such that only one RU is aligning to the gap at any particular time are taught.
摘要翻译：一种用于在诸如有线电视系统同轴电缆，光纤或铜导体电话链路，陆地微波等共享传输介质上进行多信道数字数据的同步并行多址（SCDMA）通信的方法和装置，卫星链路，本地或广域网，包括蜂窝网络的无线网络或使用合适的接口电路的这些媒体的某些组合。该系统包括远程单元的调制解调器和中央单元，用于接收布置在时隙或信道中的时分复用数字数据，并使用正交码来对多个数据的每个信道进行编码，并将每个信道数据的能量扩展到代码域。以这种方式传播数据使得系统不易受到脉冲噪声的影响。帧在远程和中央单元之间使用测距方案同步，该测距方案对于在分布式系统中以帧的方式传输数据的任何其他系统也是有用的，其中在不考虑传播延迟之间的差异的情况下，在所有单元之间同步帧。 SCDMA调制方案中的每个帧包括不包含其他数据的间隙或保护带。测距过程涉及训练每个远程单元以在重新发送从CU接收到的巴克码之前施加足够的延迟，使得由RU发送的巴克码在间隙期间到达CU。在每个RU中设置延迟的过程是一个试错过程，每个RU异步启动测距过程。教导了在任何特定时间只有一个RU与间隙对齐的竞争解决协议。

6. 发明授权

US5790523A Testing facility for a broadband communications system 失效
公开(公告)号：US5790523A
公开(公告)日：1998-08-04
申请号：US690628
申请日：1996-07-31
申请人： John A. Ritchie, Jr. , Steve Idler , Gregory T. Dubberly
发明人： John A. Ritchie, Jr. , Steve Idler , Gregory T. Dubberly
IPC分类号： H04N17/00 , H04H20/78 , H04H20/81 , H04H60/97 , H04J1/12 , H04J3/16 , H04L12/28 , H04L12/413 , H04M3/00 , H04M3/26 , H04M7/00 , H04M11/06 , H04N7/10 , H04N7/14 , H04N7/173 , H04Q11/04 , H04J1/16
CPC分类号： H04H20/12 , H04H20/78 , H04H20/81 , H04H60/97 , H04J1/12 , H04J3/1623 , H04L12/2801 , H04M7/006 , H04N7/10 , H04N7/14 , H04N7/17309 , H04Q11/0478 , H04J2203/0041 , H04J2203/0089 , H04L12/413 , H04N2007/1739 , H04Q2213/13332
摘要： A test system for evaluating the operating state of a headend of a broadband communications network for communicating telephony signals between a telephony system and subscribers of communications services. Modulators at the headend transmit telephony signals in the forward band of the broadband communications network. The forward telephony channels are demodulated and demultiplexed by a plurality of subscriber terminals into individual telephony signals directed to an addressed subscriber. Signals returning from subscribers are digitized into standard telephony signals onto the reverse band of the broadband communications network, and demodulated by demodulators of the headend into a standard telephony signal that is interfaced to the telephony network. The test system evaluates the operating state of a selected demodulator of the headend by modulating a carrier with a predetermined data pattern to generate a upstream test signal. The upstream test signal is transmitted to the selected demodulator, which responds by outputting a detected upstream test signal. The test system compares the detected upstream test signal to the data pattern to generate error measurements that support an evaluation of the operating state of the selected demodulator. For an ingress test, the upstream signals present on the selected upstream channel are combined with the upstream test signal, and this signal combination is analyzed to determine the status of the selected upstream channel and the selected demodulator. The test system evaluates the operating state of a selected modulator of the headend in response to receiving a downstream test signal generated by the selected modulator. The test system outputs a detected downstream test signal in response to the downstream test signal. In turn, the test system conducts error measurements in response to the detected downstream test signal that support an evaluation of the operating state of the selected modulator.

7. 发明授权

US5745837A Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA 失效
标题翻译：使用ATM传输协议和SCDMA在CATV系统上进行数字数据传输的装置和方法
公开(公告)号：US5745837A
公开(公告)日：1998-04-28
申请号：US616071
申请日：1996-03-14
申请人： Amir Michael Fuhrmann
发明人： Amir Michael Fuhrmann
IPC分类号： H03M13/25 , H03M13/41 , H04B1/707 , H04B7/26 , H04H60/97 , H04J3/06 , H04J11/00 , H04J13/00 , H04J13/02 , H04J14/00 , H04L5/02 , H04L5/06 , H04L7/04 , H04L12/28 , H04L12/56 , H04L25/03 , H04L27/36 , H04N7/173
CPC分类号： H04B1/707 , H04J13/00 , H04J13/004 , H04J13/18 , H04J3/0652 , H04J3/0682 , H04L12/2801 , H04L25/03343 , H04L27/362 , H04L5/023 , H04L5/026 , H04L5/06 , H04L7/04 , H04N7/10 , H04N7/17309 , H04W48/16 , H04B2201/709709 , H04B7/2668 , H04H60/97 , H04J14/007 , H04J3/0694 , H04L2025/03414 , H04L7/041 , H04W28/24 , H04W28/26 , H04W4/18 , H04W74/0866
摘要： A method and apparatus for carrying an ATM communication protocol on a hybrid fiber coax CATV system. Point to point communication is supported by use of synchronous code division multiplexing on the physical and by assigning on the MAC layer one or more orthogonal SCDMA codes exclusively for use by pairs of devices needing to communicate such the head end and any customer premises equipment. Quality of service or guaranteed bandwidth availability is implemented by controlling the code space at the MAC layer such that certain CPEs having in use peripherals which cannot tolerate interruptions in data flow may reserve one or more SCDMA codes for use exclusively by them. Standard ATM cells are modified by the addition of a two byte virtual link header which identifies to which CPE a particular ATM packet is destined. This virtual header also makes possible broadcast and multicast of packets from the head end to all CPEs. Each byte in each ATM cell has 8 bits of data and a 9th bit which is encoded with to indicate where the ATM cell starts and includes CRC data for error detection and correction. Bandwidth is allocated by the head end computer which executes algorithms on the MAC layer to collect actual bandwidth usage information and requests for bandwidth and prioritize them in accordance with the channel allocation/reservation scheme currently use. The channel allocation/reservation scheme can be changed on the fly and reallocation calculations to adjust bandwidth allocations are calculated every 10 milliseconds and the new allocations are distributed in downstream messages which are transmitted to all CPEs.
摘要翻译：一种用于在混合光纤同轴电缆系统上携带ATM通信协议的方法和装置。通过在物理上使用同步码分复用来支持点对点通信，并且通过在MAC层上分配一个或多个正交的SCDMA码，专门用于需要通信这样的头端的设备和任何客户驻地设备。通过控制MAC层的代码空间来实现服务质量或保证带宽可用性，使得具有不能容忍数据流中断的使用外围设备的某些CPE可以预留一个或多个SCDMA代码供其专门使用。标准ATM信元通过添加一个两字节的虚拟链路报头来进行修改，该标题标识特定ATM信息包指向哪个CPE。该虚拟头还使得从头端到所有CPE的分组的广播和多播成为可能。每个ATM信元中的每个字节具有8位数据，第9位被编码以指示ATM信元起始的位置，并包括用于错误检测和校正的CRC数据。带宽由头端计算机分配，前端计算机在MAC层执行算法，以收集实际带宽使用信息和请求带宽，并根据当前使用的信道分配/预留方案对其进行优先级排序。信道分配/预留方案可以在飞行中进行更改，并且重新分配计算以调整带宽分配，每10毫秒计算一次，并且新的分配被分发到发送给所有CPE的下游消息中。

8. 发明授权

US5734853A Set top terminal for cable television delivery systems 失效
标题翻译：设置电视传送系统的顶级终端
公开(公告)号：US5734853A
公开(公告)日：1998-03-31
申请号：US160193
申请日：1993-12-02
申请人： John S. Hendricks , Alfred E. Bonner , Eric C. Berkobin
发明人： John S. Hendricks , Alfred E. Bonner , Eric C. Berkobin
IPC分类号： G06Q30/00 , G06F15/00 , G06F17/00 , G06F17/30 , G08C23/04 , H03J9/00 , H04B1/06 , H04H20/42 , H04H20/78 , H04H20/79 , H04H20/95 , H04H60/13 , H04H60/22 , H04H60/23 , H04H60/31 , H04H60/39 , H04H60/47 , H04H60/66 , H04H60/72 , H04H60/74 , H04H60/94 , H04H60/96 , H04H60/97 , H04J3/00 , H04L9/32 , H04L29/12 , H04M1/57 , H04N20060101 , H04N5/00 , H04N5/44 , H04N5/445 , H04N5/45 , H04N5/60 , H04N7/025 , H04N7/08 , H04N7/088 , H04N7/10 , H04N7/12 , H04N7/14 , H04N7/15 , H04N7/16 , H04N7/173 , H04N7/24 , H04N17/00 , H04N21/218 , H04N21/2187 , H04N21/222 , H04N21/235 , H04N21/236 , H04N21/2362 , H04N21/2381 , H04N21/2389 , H04N21/25 , H04N21/2543 , H04N21/258 , H04N21/262 , H04N21/2668 , H04N21/418 , H04N21/422 , H04N21/426 , H04N21/431 , H04N21/433 , H04N21/434 , H04N21/435 , H04N21/4385 , H04N21/442 , H04N21/443 , H04N21/45 , H04N21/454 , H04N21/462 , H04N21/466 , H04N21/47 , H04N21/472 , H04N21/475 , H04N21/478 , H04N21/4786 , H04N21/4788 , H04N21/482 , H04N21/643 , H04N21/6543 , H04N21/6547 , H04N21/81 , H04N21/858 , H04N7/167
CPC分类号： H04N21/4786 , H04H20/06 , H04H20/10 , H04H20/42 , H04H20/79 , H04H60/04 , H04H60/13 , H04H60/39 , H04H60/47 , H04H60/72 , H04N21/2181 , H04N21/21815 , H04N21/2187 , H04N21/2221 , H04N21/235 , H04N21/23608 , H04N21/2362 , H04N21/2381 , H04N21/2389 , H04N21/252 , H04N21/2543 , H04N21/258 , H04N21/25891 , H04N21/26208 , H04N21/26283 , H04N21/2668 , H04N21/4181 , H04N21/4184 , H04N21/42204 , H04N21/42653 , H04N21/4312 , H04N21/4314 , H04N21/4316 , H04N21/4331 , H04N21/4344 , H04N21/4345 , H04N21/435 , H04N21/4385 , H04N21/44204 , H04N21/44222 , H04N21/443 , H04N21/4532 , H04N21/454 , H04N21/4622 , H04N21/4668 , H04N21/47 , H04N21/472 , H04N21/47211 , H04N21/47214 , H04N21/4755 , H04N21/478 , H04N21/4788 , H04N21/482 , H04N21/4821 , H04N21/64307 , H04N21/6543 , H04N21/6547 , H04N21/812 , H04N21/8146 , H04N21/8166 , H04N21/8173 , H04N21/8586 , H04N5/4403 , H04N5/44504 , H04N5/44543 , H04N5/44582 , H04N5/44591 , H04N5/602 , H04N7/088 , H04N7/0882 , H04N7/0884 , H04N7/0887 , H04N7/10 , H04N7/102 , H04N7/163 , H04N7/165 , H04N7/173 , H04N7/17318 , H04N7/17336 , H04N7/17354 , H04H20/02 , H04H20/78 , H04H20/95 , H04H2201/70 , H04H60/22 , H04H60/23 , H04H60/66 , H04H60/74 , H04H60/94 , H04H60/96 , H04H60/97 , H04M1/57 , H04N2005/4405 , H04N5/4401 , H04N5/445 , H04N5/45
摘要： A viewer interface for a television program delivery system is described. The innovation relates to methods and devices for viewer pathways to television programs. Specifically, the interface involves hardware and software used in conjunction with a television at the viewer home to create a user friendly menu based approach to television program access. The device is particularly useful in a program delivery system with hundreds of programs and a data signal carrying program information. The disclosure describes menu generation and menu selection of television programs.
摘要翻译：描述用于电视节目传送系统的观看者界面。该创新涉及用于观看电视节目的路径的方法和装置。具体地说，该界面涉及与观众家庭的电视机一起使用的硬件和软件，以便创建基于用户友好的基于菜单的电视节目存取方法。该装置在具有数百个节目和携带节目信息的数据信号的节目传送系统中特别有用。本公开描述了电视节目的菜单生成和菜单选择。

9. 发明授权

US5606725A Broadband network having an upstream power transmission level that is dynamically adjusted as a function of the bit error rate 失效
标题翻译：具有作为比特错误率的函数动态调整的上行功率传输电平的宽带网络
公开(公告)号：US5606725A
公开(公告)日：1997-02-25
申请号：US346497
申请日：1994-11-29
申请人： Gaylord A. Hart
发明人： Gaylord A. Hart
IPC分类号： H04H20/42 , H04H20/77 , H04H60/97 , H04N7/10 , H04N7/173 , H04N7/14
CPC分类号： H04H20/42 , H04H60/97 , H04N7/102 , H04N7/173 , H04H20/12 , H04H20/77
摘要： A broadband network, such as a cable television (CATV) system, for two-way digital communications between a headend and a number of remote terminals dynamically adjusts the power of the upstream signal transmitted by each remote terminal to maintain the bit error rate (BER) of the upstream signal received by the headend below a predetermined limit. In particular, each remote terminal includes a data receiver for receiving signals from the headend (including control signals), and a data transmitter for transmitting digital data signals upstream to the headend. The power level of the data transmitter can be adjustably controlled by the control signals from the headend. The headend includes a data receiver for receiving upstream signals from each of the remote terminals, error detection circuitry for detecting errors in the upstream signals, a data transmitter for transmitting signals to the remote terminals (including control signals), and a processor for calculating the rate at which errors are detected by the error detection circuitry for each remote terminal. The processor directs the data transmitter to transmit control signals to: (1) increment the transmitting power level for any remote terminal having an error rate exceeding a predetermined limit; and (2) decrement the transmitting power level for any remote terminal having an error rate remaining below the limit.
摘要翻译：用于前端和多个远程终端之间的双向数字通信的诸如有线电视（CATV）系统的宽带网络动态地调整由每个远程终端发送的上行信号的功率，以维持误码率（BER ）由头端接收的上行信号低于预定极限。特别地，每个远程终端包括用于从头端（包括控制信号）接收信号的数据接收器和用于在头端上游发送数字数据信号的数据发送器。数据发射机的功率电平可以通过来自前端的控制信号进行可调节的控制。前端包括用于接收来自每个远程终端的上行信号的数据接收器，用于检测上游信号中的错误的误差检测电路，用于向远程终端发送信号的数据发送器（包括控制信号），以及用于计算用于每个远程终端的错误检测电路检测到错误的速率。处理器指示数据发射机发送控制信号，以：（1）增加错误率超过预定限制的任何远程终端的发射功率电平; 和（2）降低误差率低于极限的任何远程终端的发射功率电平。

10. 发明授权

US5592540A Method and apparatus for selectively delivering telephony signals on a hybrid coaxial cable network 失效
标题翻译：用于在混合同轴电缆网络上有选择地传送电话信号的方法和装置
公开(公告)号：US5592540A
公开(公告)日：1997-01-07
申请号：US540365
申请日：1995-10-06
申请人： Gregory J. Beveridge
发明人： Gregory J. Beveridge
IPC分类号： H04H20/79 , H04H60/94 , H04H60/97 , H04N7/173 , H04Q11/02 , H04N7/10 , H04H1/00 , H04M13/00 , H04N7/14
CPC分类号： H04H20/79 , H04H60/94 , H04H60/97 , H04N7/17354 , H04Q11/02
摘要： An interdiction device and method to jam or delete selected video and telephony signals. The interdiction device includes amplifiers and forward couplers to prevent the telephony signals from appearing at other undesired subscriber locations on the network.
摘要翻译：拦截设备和方法来阻塞或删除所选择的视频和电话信号。截断装置包括放大器和正向耦合器，以防止电话信号出现在网络上的其他不期望的用户位置处。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式