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    • 5. 发明授权
    • Broadband communication system and method therefor
    • 宽带通信系统及其方法
    • US5802449A
    • 1998-09-01
    • US612419
    • 1996-03-07
    • Dieter BellerGert GrammelGerhard Elze
    • Dieter BellerGert GrammelGerhard Elze
    • H04B10/272H04H20/79H04H60/15H04H60/80H04H60/97H04L12/28H04N7/173
    • H04H20/79H04B10/272H04H60/80H04H60/97H04L12/2801H04N7/17318H04H2201/70H04H60/15
    • A broadband communication system (SYS), which is used to distribute television, radio and video signals, is additionally used for transmitting data signals from one subscriber (TN) to another subscriber (TN). The center (ZE) of the broadband communication system (SYS) has a service-on-demand server (SOD) which contains a control facility (CONTROL). The control facility (CONTROL) receives information transmitted by a subscriber (TN) via the return channel (R) to the center, performs a frequency conversion and transmits the information via the downstream channel (V) to all the subscribers (TN) of the broadband communication system (SYS). The information contains a source address, a destination address and the subscriber-specific data to be transmitted. Only subscribers (TN) whose address coincides with the destination address are able to interpret the information through a modem MODEM.
    • 用于分发电视,无线电和视频信号的宽带通信系统(SYS)还用于将数据信号从一个用户(TN)发送到另一个用户(TN)。 宽带通信系统(SYS)的中心(ZE)具有包含控制设备(CONTROL)的服务点播服务器(SOD)。 控制设备(CONTROL)通过返回信道(R)将由用户(TN)发送的信息接收到中心,执行频率转换,并且经由下游信道(V)将信息发送到所有的用户(TN) 宽带通信系统(SYS)。 该信息包含要发送的源地址,目的地地址和用户特定数据。 只有地址与目的地地址一致的用户(TN)能够通过调制解调器MODEM来解释信息。
    • 8. 发明授权
    • Frequency agile broadband communications system
    • 频率捷捷宽带通信系统
    • US5594726A
    • 1997-01-14
    • US219848
    • 1994-03-30
    • Leo J. ThompsonGregory T. DubberlyJohn A. Ritchie, Jr.
    • Leo J. ThompsonGregory T. DubberlyJohn A. Ritchie, Jr.
    • H04J1/00H04H20/79H04H20/81H04H60/96H04H60/97H04J1/12H04J3/16H04L12/28H04L12/413H04M3/00H04M7/00H04N7/10H04N7/173H04Q11/04
    • H04H20/79H04H20/81H04H60/97H04J1/12H04J3/1623H04L12/2801H04M7/006H04N7/10H04N7/17309H04Q11/0478H04H60/96H04J2203/0041H04J2203/0089H04L12/413H04N2007/1739H04Q2213/13332
    • A broadband communications system for coupling telephony or other digital networks to a CATV network. The system transmits a multiplex of telephony signals in the forward band of the CATV network. Each forward channel is QPR modulated on a carrier and contains multiple subscriber telephony signals. The forward telephony channels are demodulated and demultiplexed by a plurality of subscriber terminals into the individual telephony signals directed to an addressed subscriber. Audio and control signals returning from the subscriber are digitized into standard telephony signals and QPSK modulated on a carrier onto the reverse band of the CATV network. The multiplicity of reverse band telephony channels are demodulated and multiplexed into a standard telephony signal which is directly interfaced to the telephony network. The reverse band modulators are frequency agile and modulate telephony signals from a subscriber in a selected one or more frequency subbands in the reverse band of the subscription network, so as to provide selectably changeable frequencies and selectably variable bandwidth in the reverse band commensurate with a selected subscriber communication feature. e.g. a single voice line, multiple voice lines, ISDN service, data communications services, security monitoring services, etc.
    • 用于将电话或其他数字网络耦合到CATV网络的宽带通信系统。 该系统在CATV网络的前向频带中发送电话信号的复用。 每个前向信道在载波上进行QPR调制,并包含多个用户电话信号。 前向电话信道由多个用户终端解调和解复用为针对寻址订户的各个电话信号。 从用户返回的音频和控制信号被数字化为标准电话信号,并在载波上QPSK调制到CATV网络的反向频带上。 反向频带电话信道的多样性被解调和多路复用到与电话网络直接接口的标准电话信号中。 反向频带调制器是对来自订阅网络的反向频带中所选择的一个或多个频率子带中的用户的频率敏捷和调制电话信号,以便提供可选择地可变频率和可选择地在与所选择的 用户通信功能。 例如 单个语音线路,多条语音线路,ISDN服务,数据通信服务,安全监控服务等。
    • 10. 发明授权
    • System for delivering digital sound, graphics, real time files and data
via cable
    • 通过电缆传送数字声音,图形,实时文件和数据的系统
    • US5394182A
    • 1995-02-28
    • US34307
    • 1993-03-22
    • Walter R. KlappertMichael L. La Jole
    • Walter R. KlappertMichael L. La Jole
    • H04H20/79H04N7/04H04N7/08H04N7/10H04N7/16
    • H04H20/79H04N7/04H04N7/08H04N7/10H04N7/16
    • A method and apparatus for sending digital audio data and/or digital graphics within available bandwidth used to carry television signals into end-user homes and offices, such as, additional bandwidth which will become available as optical fiber replaces cable currently in use to carry cable television programming. The invention also makes it possible for digital audio and graphics, including computer generated data such as output from a word processing, paint or real time file builder program, to be sent over any regular television channel on any cable system. The system could even be used on a television signal broadcast at a normal broadcast frequency if the signal received in the home is of high enough quality. The system utilizes existing cable decoder boxes which have been improved by the addition of a decoder which decodes a composite or RF video signal containing digitized audio to audio, and optional additional signal processing, for playback or recording by existing consumer electronics audio equipment.
    • 一种用于在可用带宽内发送数字音频数据和/或数字图形的方法和装置,用于将电视信号传送到最终用户家庭和办公室,例如当光纤替代当前使用的电缆以承载电缆时将成为可用的附加带宽 电视节目制作。 本发明还使得包括计算机生成的数据(例如来自文字处理,绘画或实时文件构建程序的输出)的数字音频和图形可以通过任何电缆系统上的任何常规电视频道发送。 如果在家庭中接收到的信号质量足够高,则该系统甚至可以用于以正常广播频率的电视信号广播。 该系统利用已经通过添加解码器而改进的现有电缆解码器盒,解码器将包含数字化音频的复合或RF视频信号解码为音频,以及可选的附加信号处理,用于由现有的消费电子音频设备进行回放或记录。