公开(公告)号：WO1993005621A1

公开(公告)日：1993-03-18

申请号：PCT/US1992007471

申请日：1992-09-03

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LaBICHE, Michael ,  LIONS, Gary ,  HANSON, Ronald, J.

IPC: H04Q03/52

CPC classification number: H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0081

Abstract: A fiber optics communications system is provided. The system includes a transmitter apparatus located at a first location and having a plurality of laser transmitters and a plurality of optical switches coupling optical signals from the laser transmitters to optical fibers. A receiver apparatus is located at a second location remote from the first location and includes a plurality of receivers and a plurality of optical switches coupling optical signals from the optical fibers to the optical receivers. A first control circuit controls the switches of the transmitter apparatus in accordance with conditions at the first and the second locations. A second control circuit controls the switches of the receiver apparatus in accordance with conditions at the first and second locations. The backing up of a plurality of transmitting lasers by a single back up laser and the backing up of a plurality of receivers by a single back up receiver are also described.

公开(公告)号：WO1993005571A1

公开(公告)日：1993-03-18

申请号：PCT/US1992007470

申请日：1992-09-03

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LITTLE, Frank ,  KRUSE, Herman ,  MEGNA, John ,  PIGEON, Rezin

IPC: H03F03/08

CPC classification number: H03G3/3084 ,  H03F3/082 ,  H03F3/265 ,  H04B10/6931 ,  H04B10/6972 ,  H04B10/6973

Abstract: A receiver is described for optical signals which are amplitude modulated with broadband radio frequency signals. The receiver includes an optical detector which receives the incoming optical signal and generates a radio frequency electrical signal which varies with the power level of the incoming optical signal. This electrical signal is applied to a pair of amplifiers which are connected in a push-pull relationship. A gain control circuit controls the gain of the amplifier pair.

Abstract translation: 描述了用宽带射频信号进行幅度调制的光信号的接收机。 接收机包括光检测器，其接收输入光信号并产生随输入光信号的功率电平而变化的射频电信号。 该电信号被施加到以推挽关系连接的一对放大器。 增益控制电路控制放大器对的增益。

公开(公告)号：WO1992017027A1

公开(公告)日：1992-10-01

申请号：PCT/US1992002211

申请日：1992-03-19

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, C.

IPC: H04N07/00

CPC classification number: H04N7/17309 ,  H04H60/22 ,  H04H60/39 ,  H04H60/66 ,  H04H60/97 ,  H04H2201/70 ,  H04N7/10 ,  H04N21/25891 ,  H04N21/44222

Abstract: A method and apparatus for generating and collecting viewing statistics in a cable television system (100) is provided. A system manager (310) transmits one or more record times downstream to one or more remote terminals (120, 315a-315c) indicating a future point in time at which the terminal (120, 315a-315c) is to record the viewing statistics. The remote terminals (120, 315a-315c) store the one ore more record times in memory (503) and when the record time matches the current real time, the remote terminals (120, 315a-315c) store in memory (503) the viewing statistics. Thereafter, in response to a polling signal from the system manager (310), the set-top terminals (120, 315a-315c) transmit the previously recorded viewing statistics along with a time code corresponding to the time at which the viewing statistics were recorded upstream to the system manager (310), and the system manager (310) processes this information accordingly.

Abstract translation: 提供了一种在有线电视系统（100）中生成和收集观看统计信息的方法和装置。 系统管理器（310）向一个或多个远程终端（120,315a-315c）发送下一个或多个记录时间，指示终端（120,315a-315c）将要记录观看统计信息的未来时间点。 远程终端（120,315a-315c）将一个以上的记录时间存储在存储器（503）中，并且当记录时间与当前实时匹配时，远程终端（120,315a-315c）存储在存储器（503）中 查看统计。 此后，响应于来自系统管理器（310）的轮询信号，机顶终端（120,315a-315c）发送先前记录的观看统计数据以及对应于观看统计记录的时间的时间码 上游到系统管理器（310），并且系统管理器（310）相应地处理该信息。

公开(公告)号：WO1992010062A1

公开(公告)日：1992-06-11

申请号：PCT/US1991008921

申请日：1991-11-26

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WEST, Lamar, E., Jr.

IPC: H04N07/167

CPC classification number: H04K3/825 ,  H04K3/42 ,  H04K3/43 ,  H04K2203/14 ,  H04N7/102 ,  H04N7/166

Abstract: A compensation control for an off-premises CATV system includes an automatic gain control and an automatic slope control. A first feedback control (302, 306, 310) is used to compare a first portion of a television signal to a first reference level and null the error. A second feedback control (304, 308, 312) is used to compare a second portion of the signal to a second reference level and null the error. In a second embodiment, the second feedback control differences first and second portions of the television signal. The reference level for automatic gain control is equal to the attenuation between the off-premises equipment and the subscriber premises plus the desired level at the subscriber premises. The level of a jamming signal is set to fall within a range of power levels related to the reference level.

Abstract translation: 用于室外CATV系统的补偿控制包括自动增益控制和自动斜坡控制。 第一反馈控制（302,306,310）用于将电视信号的第一部分与第一参考电平进行比较，并将误差置零。 第二反馈控制（304,308,312）用于将信号的第二部分与第二参考电平进行比较，并将误差置零。 在第二实施例中，第二反馈控制使电视信号的第一和第二部分不同。 用于自动增益控制的参考电平等于室外设备与用户房屋之间的衰减加上用户房屋的期望水平。 干扰信号的电平被设置为落在与参考电平相关的功率电平的范围内。

公开(公告)号：WO1991012658A1

公开(公告)日：1991-08-22

申请号：PCT/US1991000929

申请日：1991-02-11

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LITTLE, Frank ,  KRUSE, Herman, A. ,  MEGNA, John

IPC: H03F03/38

CPC classification number: H04B10/6911 ,  H03F3/082 ,  H03F3/265 ,  H04B10/69 ,  H04B10/6973

Abstract: A receiver is described for optical signals which are amplitude modulated with broadband radio frequency signals. The receiver includes an optical detector (20) which receives the incoming optical signal and generates a radio frequency electrical signal which varies with the power level of the incoming optical signal. This electrical signal is applied to a pair of amplifiers (100, 200) which are connected in a push-pull relationship. In a preferred embodiment, a tuning network (500) is connected between the two amplifiers for optimizing the amplification of a selected band of radio frequencies.

Abstract translation: 描述了用宽带射频信号进行幅度调制的光信号的接收机。 该接收机包括接收入射光信号的光检测器（20），并产生随入射光信号的功率电平而变化的射频电信号。 该电信号被施加到以推挽关系连接的一对放大器（100,200）。 在优选实施例中，调谐网络（500）连接在两个放大器之间，用于优化所选频带的放大。

公开(公告)号：WO1991011884A1

公开(公告)日：1991-08-08

申请号：PCT/US1991000501

申请日：1991-01-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  GAMMIE, Keithy, Beverly

IPC: H04N07/167

CPC classification number: H04N7/1675

Abstract: A decoder for descrambling encoded satellite transmissions comprises an internal security element (1019) and a replaceable security module (1014). The program signal (SYS) is scrambled with a key (KOM1) and then the key itself is twice-encrypted and multiplexed with the scrambled program signal. The key (KOM1) is first encrypted with a first secrete serial number (SSN1) which is assigned to a given replaceable security module (1014). The key is then encrypted with a second secret serial number (SSN0) which is assigned to a given internal security element (1019). The internal security element (1019) performs a first key decryption using the second secret serial number (SSN0) stored within the internal security element (1019). The partially decrypted key (ESSN1(KOM1)) is then further decrypted by the replaceable security module (1014) using the first secret serial number (SSN1) stored within the replaceable security module (1014). The decoder then descrambles the program using the twice-decrypted key (KOM1). The replaceable security module (1014) can be replaced, allowing the security system to be upgraded or changed following a system breach.

公开(公告)号：WO1991001611A1

公开(公告)日：1991-02-07

申请号：PCT/US1990003942

申请日：1990-07-18

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ROVIRA, Luis, A. ,  WOMBLE, David, P. ,  WALTER, Allen ,  DENNISON, Robert

IPC: H04N07/04

CPC classification number: H04N7/045 ,  H04N7/08

Abstract: A multiplication circuit for use in an FM television transmitter and receiver is provided. The multiplication circuit includes a limiting circuit for limiting a subcarrier supplied thereto and a dividing circuit coupled to the limiting circuit and dividing theoutput of the limiting circuit by a predetermined factor. A mixer is coupled to the dividing circuit and mixes the output of the dividing circuit with the subcarrier.

Abstract translation: 提供了一种用于FM电视发射机和接收机的乘法电路。 乘法电路包括用于限制提供给它的副载波的限制电路和耦合到限制电路并将限制电路的输出除以预定因子的分频电路。 混频器耦合到分频电路，并将分频电路的输出与副载波进行混频。

公开(公告)号：WO1990013207A1

公开(公告)日：1990-11-01

申请号：PCT/US1990002032

申请日：1990-04-19

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  JOHNSON, Lee, R. ,  SMITH, Elizabeth, A. ,  MYERS, Howard, L. ,  KUBAN, Curt, M.

IPC: H04N07/167

CPC classification number: H04N5/44543 ,  H04N7/0888 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/173 ,  H04N7/17318 ,  H04N21/2143 ,  H04N21/25875 ,  H04N21/433 ,  H04N21/4532 ,  H04N21/47211 ,  H04N21/478 ,  H04N21/8549

Abstract: A terminal apparatus for use in a cable television system which provides a plurality of channels capable of being tuned for display at a television receiver is provided. The apparatus includes a memory for storing data for generating a plurality of predetermined character screens and for storing deauthorization data, a character generator for generating character screens from the stored character screen data at the television receiver, a deauthorization mechanism responsive to the deauthorization data in the memory means for deauthorizing selected ones of the plurality of channels, and a controller for controlling the memory and the character generator, and for composing at least one predetermined character screen for display at the television receiver in accordance with the deauthorization of a channel by the deauthorization mechanism.

Abstract translation: 提供一种在有线电视系统中使用的终端装置，其提供能够被调谐以在电视接收机上显示的多个频道。 该装置包括用于存储用于生成多个预定字符屏幕并用于存储取消授权数据的数据的存储器，用于从电视接收器处存储的字符屏幕数据生成字符屏幕的字符发生器，响应于所述电视接收器中的去授权数据的去授权机制 存储装置，用于对多个频道中选定的频道进行取消授权;以及控制器，用于控制存储器和字符发生器，并且用于组合至少一个预定的字符屏幕，以便根据通过取消授权对信道进行去授权在电视接收机处进行显示 机制。

公开(公告)号：WO1990013204A1

公开(公告)日：1990-11-01

申请号：PCT/US1990002030

申请日：1990-04-19

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  JOHNSON, Lee, R. ,  SMITH, Elizabeth, A.

IPC: H04N07/087

CPC classification number: H04N5/44543 ,  H04N5/445 ,  H04N7/0882 ,  H04N7/0888 ,  H04N7/16 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/173 ,  H04N7/17318 ,  H04N21/4104 ,  H04N21/472 ,  H04N21/478 ,  H04N21/488

Abstract: Apparatus for use in a television terminal selectively provides a background audio or video signal or both to accompany display of a screen of textual information. The apparatus comprises a tuning circuit for tuning to a predetermined background channel determined by user selection of a particular textual information screen for display. As a result, dinner music may accompany textual informative screens related to the choice of a meal. Alternatively, instructions on how to purchase a movie might be accompanied in the background by the movie. Either the movie picture or the sound or both may accompany the instruction screen.

Abstract translation: 用于电视终端的装置选择性地提供背景音频或视频信号或两者以伴随显示文本信息的屏幕。 该装置包括用于调谐到通过用户选择用于显示的特定文本信息屏幕确定的预定背景频道的调谐电路。 因此，晚餐音乐可能伴随着与膳食选择相关的文字信息。 或者，有关如何购买电影的说明可能会伴随着电影的背景。 电影图片或声音或两者都可能伴随指令画面。

公开(公告)号：WO1990013194A1

公开(公告)日：1990-11-01

申请号：PCT/US1990002035

申请日：1990-04-19

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  JOHNSON, Lee, R.

IPC: H04L12/40

CPC classification number: H04N5/44543 ,  H04L12/403 ,  H04L12/413 ,  H04N7/0888 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/173 ,  H04N7/17318 ,  H04N21/2143 ,  H04N21/478 ,  H04N21/6402

Abstract: A method of transferring data from a plurality of remote terminals to a central location over a communication network is disclosed. First random numbers are respectively generated for each of the remote terminals. A mask value is then determined. The random numbers associated with the remote terminals are compared with the mask value to determine whether a respective terminal attempts to transfer data to the central location. In a disclosed embodiment the method is used to locate new terminals in a hotel or hospital system.

Abstract translation: 公开了一种通过通信网络将数据从多个远程终端传送到中央位置的方法。 分别为每个远程终端生成第一随机数。 然后确定掩码值。 将与远程终端相关联的随机数与掩码值进行比较，以确定相应终端是否尝试将数据传输到中心位置。 在公开的实施例中，该方法用于在酒店或医院系统中定位新的终端。