公开(公告)号：WO1998023054A1

公开(公告)日：1998-05-28

申请号：PCT/US1997019888

申请日：1997-10-27

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  DAVIS, Glenn, A. ,  HUDDLESTON, Paul, Michael

IPC: H04J03/16

CPC classification number: H04Q11/0478 ,  H04L12/2801 ,  H04L12/2803 ,  H04L12/2818 ,  H04L12/2836 ,  H04L12/2856 ,  H04L12/2872 ,  H04L29/06 ,  H04L69/08 ,  H04M11/00

Abstract: A distribution system architecture provide a platform for communicating energy and non-traditional services as part of an overall communications infrastructure. A native message, regardless of the source of the message's application, is divided into data packets that are encapsulated and transmitted through an open network from a headend to a gateway (40a-40c) or from the gateway (40a-40c) to the headend. The receiver of the encapsulated data reassembles the original native message from the encapsulated data packets. The encapsulating information can include a header which incorporates a time division multiple access transport scheme. The encapsulating information at the headend provisions the gateways (40a-40c) from the headend in a real time fashion and the headend dynamically allocates the gateway functions of listening, talking and acknowledging. A third of the time slots are allocated for polling each of the gateways during a predetermined period, a second third of the time slots are allocated to asynchronous, unsolicited communications from the gateways (40a-40c), and the final third of the time slots are reserved for either polled or asynchronous communications. The reserved slots are dynamically allocated by the headend based on system and gateway needs.

Abstract translation: 分配系统架构提供了一个平台，用于将能源和非传统服务作为整体通信基础设施的一部分进行通信。 无论消息的应用的来源如何，本地消息被划分为通过开放网络从前端到网关（40a-40c）或从网关（40a-40c）到头端的封装和传输的数据分组 。 封装数据的接收者重新组合了封装数据包的原始本机消息。 封装信息可以包括包含时分多址传输方案的报头。 头端的封装信息以实时方式从前端提供网关（40a-40c），并且头端动态地分配收听，通话和确认的网关功能。 三分之一的时隙被分配用于在预定时段期间对每个网关进行轮询，将第二三分之一的时隙分配给来自网关（40a-40c）的异步非主动通信，并且最后三分之一的时隙 保留用于轮询或异步通信。 保留的时隙由头端根据系统和网关的需要动态分配。

公开(公告)号：WO1998018219A1

公开(公告)日：1998-04-30

申请号：PCT/US1997007808

申请日：1997-05-08

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ATLAS, Dogan

IPC: H04B10/04

CPC classification number: H04B10/2537

Abstract: An optical modulator (20) for a high power laser transmitter includes a laser source (22) coupled through a phase modulator (24) to a signal modulator (26). A noise source or continuous wave sources may provide signals to the laser source or the phase modulator or both.

Abstract translation: 用于大功率激光发射器的光调制器（20）包括通过相位调制器（24）耦合到信号调制器（26）的激光源（22）。 噪声源或连续波源可以向激光源或相位调制器或两者提供信号。

公开(公告)号：WO1997041469A1

公开(公告)日：1997-11-06

申请号：PCT/US1997006737

申请日：1997-04-23

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  HODGE, Ronald, L.

IPC: G02B06/00

CPC classification number: G02B6/4455 ,  G02B6/4452 ,  G02B6/4453

Abstract: A transceiver module support apparatus comprising a support tray (24) received in a chassis (22). The tray (24) is specially configured for receiving and supporting a plurality of modules (38) with a front portion of the tray (24) including cable routing (34) and supporting features with curved contours of predetermined bending radii to prevent excessive bending or twisting of the cables. The guide portions (36, 30) have smooth contours with the desired bending radii extending in at least two directions to allow for different cable routings. The tray (24) also includes integral structural features for mounting cooling fan units and interconnecting them.

Abstract translation: 一种收发器模块支撑装置，包括容纳在底盘（22）中的支撑盘（24）。 托盘（24）被特别地构造成用于容纳和支撑具有托盘（24）的前部的多个模块（38），包括电缆布线（34）和具有预定弯曲半径的弯曲轮廓的支撑特征，以防止过度弯曲或 电缆扭曲。 引导部分（36,30）具有平滑的轮廓，其中期望的弯曲半径在至少两个方向上延伸以允许不同的电缆布线。 托盘（24）还包括用于安装冷却风扇单元并将其互连的整体结构特征。

公开(公告)号：WO1996034464A1

公开(公告)日：1996-10-31

申请号：PCT/US1996005318

申请日：1996-04-22

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  MORRIS, Rodney, Alan

IPC: H04B10/06

CPC classification number: H04B10/672

Abstract: An automatic gain control circuit (110) for use in a multichannel RF system using fiber optic links. The circuit samples the power levels from a number of attenuated RF signals simultaneously and adjusts the gain in all of the channels by the amount required to keep the highest power channel below a predetermined power level determined by the power capacity of the fiber optic link while maintaining the signal strength relationship between the attenuated signals as was existing between the RF input signals.

Abstract translation: 一种在使用光纤链路的多通道RF系统中使用的自动增益控制电路（110）。 该电路同时从多个衰减的RF信号中对功率电平进行采样，并将所有信道中的增益调整为将最高功率信道保持在由光纤链路的功率容量确定的预定功率电平以下，同时维持 衰减信号之间的信号强度关系存在于RF输入信号之间。

公开(公告)号：WO1996029825A1

公开(公告)日：1996-09-26

申请号：PCT/US1996004193

申请日：1996-03-20

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC.

IPC: H04N07/16

CPC classification number: H04N7/104 ,  H01R31/005 ,  H04N7/102 ,  H04N7/16

Abstract: A method and system for distributing multimedia signals to a subscriber from a headend unit (12). The multimedia signals are transmitted on a network media as a composite RF (130-136) and AC (38) signal. A passive unit is upgraded by with a circuit having connectors that separates the AC from the RF signal. The signals are split in the upgraded passive unit. The AC signal is fed to a power distribution unit (22) which generates an AC output signal that is surge protected, RF filtered and current limited. The RF signal and AC output signal are separately fed to a customer interface unit (24) where the RF signal is decoded and transmitted to a subscriber. By providing a passive unit where the AC and RF signals are separated in the same unit, the system can be upgraded with a power distribution unit (22) when AC signals are required to supply power to subscriber equipment.

Abstract translation: 一种用于从头端单元（12）向用户分发多媒体信号的方法和系统。 多媒体信号作为复合RF（130-136）和AC（38）信号在网络媒体上传输。 无源单元通过具有将AC与RF信号分离的连接器的电路升级。 信号在升级的被动单元中分裂。 AC信号被馈送到配电单元（22），该配电单元产生浪涌保护，RF滤波和电流限制的AC输出信号。 RF信号和AC输出信号分别馈送到客户接口单元（24），其中RF信号被解码并发送给用户。 通过提供一个无源单元，其中AC和RF信号在相同的单元中分离，当需要AC信号为用户设备供电时，系统可以用配电单元（22）进行升级。

公开(公告)号：WO1996009720A1

公开(公告)日：1996-03-28

申请号：PCT/US1995011981

申请日：1995-09-19

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  AKINS, Glen, L., III ,  BANKER, Robert, O. ,  LETT, David, B.

IPC: H04N05/445

CPC classification number: H04N21/6547 ,  G06F8/60 ,  G09G2340/12 ,  H04N5/272 ,  H04N5/44504 ,  H04N5/44513 ,  H04N5/44543 ,  H04N5/44591 ,  H04N5/45 ,  H04N7/025 ,  H04N7/03 ,  H04N7/06 ,  H04N7/08 ,  H04N7/088 ,  H04N7/0884 ,  H04N7/10 ,  H04N7/16 ,  H04N7/161 ,  H04N7/163 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/17354 ,  H04N21/2743 ,  H04N21/4104 ,  H04N21/4184 ,  H04N21/4316 ,  H04N21/4432 ,  H04N21/4435 ,  H04N21/472 ,  H04N21/4786 ,  H04N21/4788 ,  H04N21/488 ,  H04N21/4884 ,  H04N21/8166

Abstract: A method of downloading on-screen graphics and captions to a television terminal for display comprises a system manager computer (22) and data transmission apparatus coupled thereto for transmitting program code, cube definition data and downloadable display commands to the terminal (14). Manufacturer intervention is minimized in that the system operator scans (2) a graphic image (1) to create a bit map and encodes the bit map into the cube definition data (4). The system manager also generates display control commands for downloading to the terminal without manufacturer intervention which control when, how long, where and how the graphic image is displayed. The program code, the cube definition data and the downloadable display commands may be globally or addressably downloaded via in band video, in band audio or outband data transmission. The output graphics for display may be accompanied by a predetermined audio signal.

Abstract translation: 将屏幕上的图形和字幕下载到电视终端进行显示的方法包括系统管理计算机（22）和耦合到其上的数据传输装置，用于向终端（14）发送程序代码，立方体定义数据和可下载的显示命令。 制造商干预最小化，因为系统操作员扫描（2）图形图像（1）以创建位图并将位图编码到立方体定义数据（4）中。 系统管理员还生成用于下载到终端的显示控制命令，无需制造商干预，从而可以控制显示图形图像的时间，时间，时间和方式。 程序代码，立方体定义数据和可下载的显示命令可以通过带内视频，带内音频或带外数据传输全局地或可寻址地下载。 用于显示的输出图形可以伴随有预定的音频信号。

公开(公告)号：WO1996008925A1

公开(公告)日：1996-03-21

申请号：PCT/US1995010899

申请日：1995-08-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  JELINEK, Catherine, W. ,  KRUSE, Herman, A. ,  AL-KHALIL, Munther, A. ,  THOMPSON, Leo, J.

IPC: H04N07/14

CPC classification number: H04N7/173 ,  H04N7/17309

Abstract: A cable television system employs two-way communication between a headend (30) and at least one subscriber terminal (10). The two-way communication is provided by having separate frequency bands for each communication path. The frequency bands do not overlap and the higher frequency band is used for subscriber terminal to headend transmissions. A line amplifier (100) is provided that employs two diplex filters (110, 140) each connected to both a forward and reverse amplifier (120, 130). The high pass portions of the diplex filters (330, 340, 201) are formed from both lumped and distributed components.

Abstract translation: 有线电视系统在前端（30）和至少一个用户终端（10）之间采用双向通信。 通过为每个通信路径具有单独的频带来提供双向通信。 频带不重叠，较高的频带用于用户终端头端传输。 提供一种线路放大器（100），其使用两个分别连接到正向和反向放大器（120,130）的双工滤波器（110,140）。 双工过滤器（330,340,201）的高通部分由集总和分布的部件形成。

公开(公告)号：WO1995027330A1

公开(公告)日：1995-10-12

申请号：PCT/US1995004225

申请日：1995-04-05

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H03D03/18

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

Abstract: A synchronous detector (200) has first and second mixer circuits (206, 208) and a voltage-controlled oscillator (212). The voltage-controlled oscillator provides a local oscillator signal directly to the second mixer circuit and indirectly to the first mixer circuit through a phase transformer (210). The output of the first and second mixer circuits are combined in a combiner circuitry (220) to produce a jitter cancelled output signal. The jitter cancelled output signal is filtered in a loop filter (214) and applied to the voltage-controlled oscillator to control the frequency and phase of the local oscillator signal. The combiner circuitry includes a summer (222) and a jitter cancellation filter (228). The jitter cancellation filter is preferably a high pass filter matched to spectrum of the signal detected. The output of the first mixer circuit is passed through the high pass filter into one input of the summer while the output of the second mixer circuit is passed to the second input of the summer. The output of the summer is passed to the loop filter.

Abstract translation: 同步检测器（200）具有第一和第二混频器电路（206,208）和压控振荡器（212）。 压控振荡器将本地振荡器信号直接提供给第二混频器电路，并通过相位变压器（210）间接地提供给第一混频器电路。 第一和第二混频器电路的输出在组合器电路（220）中组合以产生抖动消除的输出信号。 抖动消除的输出信号在环路滤波器（214）中被滤波，并且被施加到压控振荡器以控制本地振荡器信号的频率和相位。 组合器电路包括加法器（222）和抖动消除滤波器（228）。 抖动消除滤波器优选地是与所检测的信号的频谱匹配的高通滤波器。 第一混频器电路的输出通过高通滤波器进入夏季的一个输入端，而第二混频器电路的输出被传递到夏季的第二输入端。 夏季的输出将传递给环路滤波器。

公开(公告)号：WO1995005607A2

公开(公告)日：1995-02-23

申请号：PCT/US1994005730

申请日：1994-05-23

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  GRANERE, Verne, Robert

IPC: G01P21/00

CPC classification number: G01P21/02 ,  G01P21/00

Abstract: A transducer testing system for low frequency vibrations incorporates an electric motor/gearbox assembly (16) with an output shaft (18) and mechanical means for converting low frequency shaft rotation of the output shaft (18) to uniform low frequency sinusoidal excitation of an accelerometer (10). Simultaneously, a data processing unit (14) measures the response of the accelerometer (10) to the uniform low frequency excitation within predetermined frequency ranges. The data processing unit (14) then compares the measured response with predetermined accelerometer response limits to ascertain whether the accelerometer (10) is function. The transducer testing system overcomes the limitations of electrodynamic testers to provide a means for accurately testing the low frequency response of the accelerometer (10).

Abstract translation: 用于低频振动的换能器测试系统包括具有输出轴（18）的电动机/齿轮箱组件（16）和用于将输出轴（18）的低频轴旋转转换为加速度计的均匀低频正弦激励的机械装置 （10）。 同时，数据处理单元（14）在预定频率范围内测量加速度计（10）对均匀低频激励的响应。 然后，数据处理单元（14）将测量的响应与预定的加速度计响应极限进行比较，以确定加速度计（10）是否起作用。 换能器测试系统克服了电动测试仪的局限性，为精确测试加速度计（10）的低频响应提供了一种手段。

公开(公告)号：WO1994023511A1

公开(公告)日：1994-10-13

申请号：PCT/US1994003319

申请日：1994-03-28

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  THATCHER, William, Bradford, Jr.

IPC: H04L09/00

CPC classification number: H04L9/065 ,  G06T9/005 ,  H04L2209/30 ,  H04L2209/34

Abstract: Methods and apparatus for encoding compressed data streams efficiently, and methods and apparatus for decoding the encrypted data streams are disclosed. In an encoder (10'), an incoming data stream is fed to a Huffman coding block (10) that performs data compression. The output codewords are fed to a forward error correction block (30). The data blocks are fed to an error insertion block (32), which inserts a one-bit error in each data block. The parity data is fed to a first encryption block (34) that produces encrypted parity data. The output of the error insertion block (32), the encrypted parity data, and a synchronization word output by a sync generator (50) are fed to a multiplexer (48). A seed generator block (36) generates random numbers for use by the first encryption block (34) as seeds for encrypting the parity data. A multisession key register (40) stores a multisession key employed as a seed in a second encryption block (38) to encrypt the random number seed. A secret serial number (SSN) read from a database (46) and stored in an SSN register (44) is employed by a third encryption block (42) as a seed for encrypting the multisession key. A decoder (14') receives the multiplex data and recovers the original data.

Abstract translation: 公开了用于对压缩数据流进行有效地编码的方法和装置，以及用于对加密的数据流进行解码的方法和装置。 在编码器（10'）中，输入数据流被馈送到执行数据压缩的霍夫曼编码块（10）。 输出码字被馈送到前向纠错块（30）。 数据块被馈送到错误插入块（32），其在每个数据块中插入一位错误。 奇偶校验数据被馈送到产生加密奇偶校验数据的第一加密块（34）。 错误插入块（32）的输出，加密的奇偶校验数据和由同步发生器（50）输出的同步字被馈送到多路复用器（48）。 种子生成器块（36）生成用于由第一加密块（34）使用的随机数作为加密奇偶校验数据的种子。 多区段密钥寄存器（40）将用作种子的多会话密钥存储在第二加密块（38）中，以加密随机数种子。 从数据库（46）读取并存储在SSN寄存器（44）中的秘密序列号（SSN）被第三加密块（42）用作用于加密多区段密钥的种子。 解码器（14'）接收多路复用数据并恢复原始数据。