公开(公告)号：WO1997045953A1

公开(公告)日：1997-12-04

申请号：PCT/US1997009233

申请日：1997-05-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  VOGT, Stephan, W.

IPC: H03F03/66

CPC classification number: H03G3/005 ,  H03G3/30

Abstract: The automatic gain control circuit of the present invention improves upon conventional techniques using a pilot carrier for control by monitoring (13) for the presence of the pilot carrier. If the pilot carrier level is at an undetectable level, it will switch control of the level control section (2) of the automatic gain control circuit to the equivalent thermal setting by means of a switch (24). The switch (24) connects the output of a temperature-sensing network (14) to a Bode driving circuit (23) that approximates attenuation of a given transmission medium over temperature. The gain setting will therefore be based on an approximation of what the cable losses should be at the detected temperature of the amplifier housing. The present invention provides dynamic gain adjustment, even in the event of pilot carrier signal loss.

Abstract translation: 本发明的自动增益控制电路改进了使用导频载波进行控制的常规技术，用于通过监视（13）导频载波的存在来进行控制。 如果导频载波电平处于不可检测的水平，则通过开关（24）将自动增益控制电路的电平控制部分（2）的控制切换到等效的热设定。 开关（24）将温度感测网络（14）的输出连接到波特驱动电路（23），该驱动电路近似于给定的传输介质在温度下的衰减。 因此，增益设置将基于电缆损耗应在放大器外壳的检测温度下的近似值。 本发明即使在导频载波信号丢失的情况下也提供动态增益调整。

公开(公告)号：WO1997037493A1

公开(公告)日：1997-10-09

申请号：PCT/US1997004738

申请日：1997-03-24

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  KOPERDA, Francis, Richard

IPC: H04N07/10

CPC classification number: H04L49/3081 ,  H04L12/2801 ,  H04L2012/5619 ,  H04L2012/5626 ,  H04L2012/563 ,  H04L2012/5642 ,  H04N7/147 ,  H04N7/17318 ,  H04Q11/0478

Abstract: A cable network architecture includes a master head-end, at least one distribution hub connected to the master head end via a first communications link, and one or more user modem connected to the distribution hubs via a second communication link. The master head-end includes an inter-hub communication switch (101), a network controller (104), a network element manager (106), and one or more external communication link. The distribution hub includes at least one modulator (201), and at least one demodulator (202), a link access computer (204) for controlling transmission and reception of data by the distribution hub, a hub element manager (209) for detecting faulty communications, and a local switch for switching data between the modulators, demodulator, the link access computer and the hub element manager within the distribution hub.

Abstract translation: 有线网络架构包括主头端，经由第一通信链路连接到主头端的至少一个分配集线器，以及经由第二通信链路连接到分配集线器的一个或多个用户调制解调器。 主机头端包括集线器间通信交换机（101），网络控制器（104），网络元件管理器（106）和一个或多个外部通信链路。 分配集线器包括至少一个调制器（201）和至少一个解调器（202），用于控制由分配集线器发送和接收数据的链路接入计算机（204），用于检测故障的集线器元件管理器（209） 通信和用于在调度器，解调器，链路接入计算机和分配集线器内的集线器元件管理器之间切换数据的本地交换机。

公开(公告)号：WO1997036390A1

公开(公告)日：1997-10-02

申请号：PCT/US1997005145

申请日：1997-03-26

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  MILLER, Kevin, L. ,  BORAZJANI, Ramin

IPC: H04H01/06

CPC classification number: H04H20/80 ,  H04H20/34 ,  H04H20/42 ,  H04H20/79 ,  H04H40/27 ,  H04H60/97 ,  H04L5/023 ,  H04L5/143 ,  H04L7/0062 ,  H04L12/2801 ,  H04M7/006 ,  H04M7/12 ,  H04M9/027 ,  H04N7/10 ,  H04N7/17309

Abstract: 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.

Abstract translation: 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的所选频谱子带内的所有上行电话信号，以将加权重叠和加法电路应用于接收机匹配滤波器，然后由FFT电路转换为基带。 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。

公开(公告)号：WO1997020432A1

公开(公告)日：1997-06-05

申请号：PCT/US1996019077

申请日：1996-11-27

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LETT, David, B.

IPC: H04N07/16

CPC classification number: H04N21/435 ,  A63F13/12 ,  A63F13/338 ,  A63F2300/409 ,  H04N7/163 ,  H04N7/1675 ,  H04N21/235 ,  H04N21/8166

Abstract: A home communications terminal (40) for use in a communications network is provided. The home communications terminal includes an applications module (300) and a subscriber terminal module (140). The applications module has a memory including a first memory portion (329) and a processing unit (326) for executing program code stored in the first memory portion of the memory of the applications module. The subscriber terminal module has a memory including a first memory portion for storing a first boot-loader program and a second memory portion (134) for storing a second-boot loader program. A processing unit (128) of the subscriber terminal executes the first boot-loader program to load program code in the second memory portion of the memory of the subscriber terminal module and executes the second boot-loader program to load program code in the first memory portion of the memory of the applications module.

Abstract translation: 提供了一种用于通信网络的家庭通信终端（40）。 家庭通信终端包括应用模块（300）和用户终端模块（140）。 应用模块具有包括用于执行存储在应用模块的存储器的第一存储器部分中的程序代码的第一存储器部分（329）和处理单元（326）的存储器。 用户终端模块具有包括用于存储第一引导加载程序的第一存储器部分和用于存储第二引导加载程序的第二存储器部分（134）的存储器。 用户终端的处理单元（128）执行第一引导加载程序以将程序代码加载到用户终端模块的存储器的第二存储器部分中，并执行第二引导加载程序以将程序代码加载到第一存储器 部分应用程序模块的内存。

公开(公告)号：WO1997016895A1

公开(公告)日：1997-05-09

申请号：PCT/US1996016721

申请日：1996-10-18

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BOUCHUNG, Lin ,  KOPERDA, Francis, R.

IPC: H04J03/16

CPC classification number: H04N21/6583 ,  H04J3/1694 ,  H04J3/247 ,  H04L2012/561 ,  H04L2012/5616 ,  H04L2012/563 ,  H04L2012/5632 ,  H04L2012/5675 ,  H04L2012/5679 ,  H04N7/17309 ,  H04N7/17318 ,  H04N21/2385 ,  H04N21/2393 ,  H04N21/2402 ,  H04Q11/0478

Abstract: In a two way cable system that includes a controller and a plurality of user terminals (Fig. 1), a method of granting rights for upstream data transmission from the user terminals includes processing contention requests to generate contention grants and maintaining a list of connections, each connection having specified therefor a predetermined bit rate. The controller sends a downstream data stream to the user terminals and receives an upstream data stream from the user terminals. The downstream data stream includes a plurality of grant fields, and the upstream data stream includes upstream data slots and upstream control slots.

Abstract translation: 在包括控制器和多个用户终端（图1）的双向电缆系统中，从用户终端授权上游数据传输的权利的方法包括处理争用请求以产生竞争授权并维护连接列表， 每个连接已经指定了预定的比特率。 控制器向用户终端发送下​​行数据流，并从用户终端接收上行数据流。 下游数据流包括多个授权字段，并且上行数据流包括上游数据时隙和上游控制时隙。

公开(公告)号：WO1997013208A1

公开(公告)日：1997-04-10

申请号：PCT/US1995012459

申请日：1995-10-06

Applicant: SCIENTIFIC-ATLANTA, INC. ,  HOUSER, Peter, B.

Inventor： SCIENTIFIC-ATLANTA, INC.

IPC: G06F17/40

CPC classification number: G07C5/008 ,  G07C5/0858

Abstract: A method and apparatus for maintaining an electronic vehicle log (1) involves the formation of protected data packets (411) which are electronically signed by certified users. The electronic vehicle log (1) preferably comprises a secure non-volatile memory (2) that may be removed from the vehicle (200). Preferably the apparatus, referred to herein as a date processing interface unit (DPIU) (1), has access to date and real time of day and location data so that the protected data packets (411) further include, besides data to be protected, the date and time of day and the location of the vehicle (200) for comparison with expected data as further protection against fraudulent or forged data entry. Preferably, on-board sensors (6) collect in-transit monitoring and cargo monitoring data for access by various certified users. Event data such as governmental inspection or border crossing data may be entered into the log by governmental authorities.

Abstract translation: 用于维护电子车辆日志（1）的方法和装置涉及形成被认证用户电子签名的受保护数据分组（411）。 电子车辆日志（1）优选地包括可以从车辆（200）移除的安全的非易失性存储器（2）。 优选地，在本文中称为日期处理接口单元（DPIU）（1）的设备可以访问日期和实时的日期和位置数据，使得受保护的数据分组（411）除了要被保护的数据之外还包括， 一天中的日期和时间以及与预期数据进行比较的车辆（200）的位置，以进一步防止欺诈或伪造的数据输入。 优选地，车载传感器（6）收集在过境监视和货物监控数据以供各种认证用户访问。 诸如政府检查或过境数据的事件数据可以由政府当局记入日志。

公开(公告)号：WO1996037999A1

公开(公告)日：1996-11-28

申请号：PCT/US1996007421

申请日：1996-05-21

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, J.

IPC: H04N07/00

CPC classification number: H04N21/4383 ,  H04N5/4401 ,  H04N5/50 ,  H04N7/0887 ,  H04N7/10 ,  H04N21/2362 ,  H04N21/4345 ,  H04N21/482

Abstract: The Logical Channel Table (LCT), utilizing simple conventional channels or Composite Channels, provides mapping between a Logical Channel Number (LCN) representing a service and the transport stream (TSID) / program number (PN) on which the service can be found. The LCT entry contains a Composite Channel Indicator (CCI), which when set to '1', indicates that the selected channel is a composite channel thereby indicating the home channel of the Composite Channel. The LCT provides the Composite Channel Table (CCT) to the decoder (10) so that the tuner (12) can be returned to the actual program designated in the CCT for current viewing. Each entry in the CCT associates a Composite Channel Number (CCN) with a LCN and represents the "present" definition for the composite channel. As time progresses, the CCN is used as a "pointer" to the LCN which is the currently active service for the composite channel. These tables work with conventional MPEG-2 service definitions to decode multi-service transport streams.

Abstract translation: 使用简单的常规信道或复合信道的逻辑信道表（LCT）提供了表示服务的逻辑信道号（LCN）和可以在其上找到服务的传输流（TSID）/节目号（PN）之间的映射。 LCT条目包含复合信道指示符（CCI），当被设置为“1”时，指示所选择的信道是复合信道，从而指示复合信道的归属信道。 LCT向解码器（10）提供复合频道表（CCT），使得调谐器（12）可以返回到CCT中指定的实际程序，以便当前观看。 CCT中的每个条目将复合通道号（CCN）与LCN相关联，并表示复合通道的“当前”定义。 随着时间的推移，CCN被用作指向LCN的“指针”，LCN是组合通道的当前活动服务。 这些表适用于传统的MPEG-2服务定义来解码多业务传输流。

公开(公告)号：WO1996029781A1

公开(公告)日：1996-09-26

申请号：PCT/US1996003453

申请日：1996-03-13

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC.

IPC: H03H07/48

CPC classification number: H01R24/52 ,  H01R9/0509 ,  H01R2107/00 ,  H03H7/48

Abstract: A method and system for distributing multimedia signals to a subscriber (14) from a headend unit (12). The multimedia signals are transmitted on a network media as an RF signal. The RF signal is fed to an input terminal (50) of a tap (20) which has an RF circuit (58) that splits the RF signal and distributes to an output terminal (52). The RF circuit (58) splits the RF signals, and feeds the split signal to a plurality of connectors (30-36) on the tap's front panel (70). The RF signals on the output terminal (52) are fed downstream to a plurality of subscribers (14). A switch (42) is placed in the tap such that when the RF circuit (58) is removed for repair, maintenance or service, an electrical connection is maintained between the input (50) and output (52) terminal to prevent a disconnection of service downstream.

Abstract translation: 一种用于从头端单元（12）向多个订户（14）分发多媒体信号的方法和系统。 多媒体信号作为RF信号在网络媒体上传送。 RF信号被馈送到具有分解RF信号并分配到输出端子（52）的RF电路（58）的抽头（20）的输入端子（50）。 RF电路（58）分离RF信号，并将分离信号馈送到抽头的前面板（70）上的多个连接器（30-36）。 输出端子（52）上的RF信号被向下游馈送给多个用户（14）。 开关（42）放置在抽头中，使得当RF电路（58）被移除用于修理，维护或维修时，在输入（50）和输出（52）端子之间保持电连接，以防止断开 服务下游

公开(公告)号：WO1996026597A1

公开(公告)日：1996-08-29

申请号：PCT/US1996002067

申请日：1996-02-23

Applicant: SCIENTIFIC-ATLANTA, INC. ,  WILSON, John, Bryan ,  LEWIS, Donald, Ray, Jr. ,  FUNDERBORK, Jason, J. ,  MOBLEY, Joseph, Graham ,  SUMMERS, Macy, Webb

Inventor： SCIENTIFIC-ATLANTA, INC.

IPC: H04N01/00

CPC classification number: H04H40/90 ,  H04B7/18571 ,  H04B7/18597 ,  H04N7/20

Abstract: An antenna apparatus (806) for receiving and transmitting signals having a frequency less than one gigahertz is disclosed. The antenna apparatus (806) includes a dish portion (1101) having at least one wire antenna (1102) mounted thereon or embedded therein. The dish portion (1101) receives signals having frequencies greater than one gigahertz, while the wire antenna (1102) is capable of transmitting and receiving signals having frequencies less than one gigahertz. The antenna apparatus (806) may optionally include plural wire antennas (1102, 1103) for communications in different frequency bands below one gigahertz. In a preferred embodiment, an extension (1104) made of a dielectric material is coupled to the periphery of the dish (1101) and the wire antenna or antennas (1102, 1103) are embedded in the extension (1104) by thermal copper spraying or by spraying conductive ink thereon to form the wire antenna or antennas (1102, 1103).

Abstract translation: 公开了一种用于接收和发送频率小于1千兆赫兹的信号的天线装置（806）。 天线装置（806）包括具有安装在其上或嵌入其中的至少一个线天线（1102）的盘部分（1101）。 盘部分（1101）接收频率大于1千兆赫兹的信号，而有线天线（1102）能够发送和接收频率小于1千兆赫兹的信号。 天线装置（806）可以可选地包括用于在一千兆赫以下的不同频带中通信的多个有线天线（1102,1103）。 在一个优选实施例中，由电介质材料制成的延伸部（1104）与盘（1101）的周边连接，并且金属丝天线（1102,1103）通过热铜喷涂嵌入在延伸部（1104）中，或 通过在其上喷射导电油墨以形成有线天线或天线（1102,1103）。

公开(公告)号：WO1996011526A1

公开(公告)日：1996-04-18

申请号：PCT/US1995012220

申请日：1995-09-29

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  MONTREUIL, Leo

IPC: H03C01/60

CPC classification number: H03C3/40 ,  H03C3/04 ,  H03D1/2245 ,  H03D1/2254 ,  H03D3/007 ,  H03D3/245 ,  H03D2200/0031 ,  H04L27/0008 ,  H04L27/02 ,  H04L27/38 ,  H04L27/3836 ,  H04N5/4401

Abstract: A digital data demodulator/decoder (30) for either a quadrature amplitude (QAM) or vestigial sideband (VSB) modulated signal includes a quadrature detector (32, 33) feeding through digital filters (38, 39) to a decoder (50) which switches between the in-phase and quadrature outputs of the digital filters (38, 39).

Abstract translation: 用于正交幅度（QAM）或残留边带（VSB）调制信号的数字数据解调器/解码器（30）包括通过数字滤波器（38,39）馈送到解码器（50）的正交检测器（32,33） 在数字滤波器（38,39）的同相和正交输出之间切换。