公开(公告)号：WO1994017630A1

公开(公告)日：1994-08-04

申请号：PCT/US1994000593

申请日：1994-01-27

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  INGRAM, Eric, James ,  FARMER, James, O.

IPC: H04N05/60

CPC classification number: H04N19/597 ,  H04N5/44 ,  H04N5/607 ,  H04N5/62 ,  H04N7/06 ,  H04N13/156 ,  H04N13/161 ,  H04N13/194

Abstract: An apparatus and method for demodulating and remodulating a transmitted signal prior to presentation to a television receiver, the transmitted signal comprising a video signal, a first channel signal, and a second channel signal, wherein one of the two channel signals is selected, demodulated and remodulated with the video signal prior to presentation to the television receiver. The apparatus allows the viewer of a television receiver which accepts a single channel signal to select between one of two alternate channels signals associated with a video broadcast without the need to modify the television receiver. The apparatus is particularly well suited for television broadcasts using a dual carrier transmission format. A novel varactor diode tuning means is used in one embodiment for changing the center frequency of a frequency modulation demodulator. The disclosed apparatus also transparently allows stereo demodulation for television receivers which are capable of such stereo demodulation.

Abstract translation: 一种用于在呈现给电视接收机之前对发射信号进行解调和再调制的装置和方法，所发送的信号包括视频信号，第一信道信号和第二信道信号，其中两个信道信号之一被选择，解调和 在呈现给电视接收机之前用视频信号再调制。 该装置允许接收单个信道信号的电视接收机的观看者在与视频广播相关联的两个替代频道信号中的一个之间进行选择，而不需要修改电视接收机。 该装置特别适用于使用双载波传输格式的电视广播。 在一个实施例中使用新的变容二极管调谐装置来改变频率调制解调器的中心频率。 所公开的装置还透明地允许能够进行这种立体声解调的电视接收机的立体声解调。

公开(公告)号：WO1994013096A1

公开(公告)日：1994-06-09

申请号：PCT/US1993011649

申请日：1993-12-01

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LETT, David, B. ,  HAMILTON, Scott, L. ,  BACON, Kinney, C. ,  RALEY, Michael

IPC: H04N01/00

CPC classification number: H04N5/44543 ,  H04N5/44582 ,  H04N5/50 ,  H04N5/765 ,  H04N5/782 ,  H04N7/10 ,  H04N7/17354 ,  H04N21/4334 ,  H04N21/4622 ,  H04N21/47 ,  H04N21/47214 ,  H04N21/84 ,  H04N2007/1739

Abstract: An auxiliary device control for a subscriber terminal includes a four wire ribbon cable (306) defining a bidirectional communication and data interface from the terminal (40) to one or more auxiliary devices (310, 312, 314). A communication and data protocol for the bidirectional transfer of instructions, status, and data over the interface includes an address field, command or reply field, data length field, and checksum field (fig. 6) transmitted at 9600 baud. In a preferred implementation, the auxiliary device to be controlled is an IR peripheral controller (300) which can tune a VCR (350), and switch it on and off. Several transactions in the communications and data protocol are used to effect the operation where a control VCR command and reply transaction cause the control of the tuning and recording of the VCR. A set-up VCR command and a brand reply transaction is used to provide information to configure the controller with brands and model of the VCRs. A program event code command and a program event timer reply transaction provide for the automatic recording of a program event based on an event code listed in a television schedule. A channel map command and a reply transaction provide for the downloading of the local cable system channel line up into the controller.

Abstract translation: 用于用户终端的辅助设备控制包括四线带状电缆（306），其定义从终端（40）到一个或多个辅助设备（310,312,314）的双向通信和数据接口。 用于通过接口双向传送指令，状态和数据的通信和数据协议包括以9600波特传输的地址字段，命令或应答字段，数据长度字段和校验和字段（图6）。 在优选的实施方案中，待控制的辅助设备是IR外围控制器（300），其可以调谐VCR（350）并将其打开和关闭。 使用通信和数据协议中的多个事务来实现控制VCR命令和应答事务导致对VCR的调谐和记录的控制的操作。 使用设置VCR命令和品牌回复交易来提供信息来配置控制器的品牌和型号的VCR。 节目事件代码命令和节目事件定时器回复交易提供基于电视节目表中列出的事件代码自动记录节目事件。 频道映射命令和应答事务提供将本地电缆系统信道线路下载到控制器中。

公开(公告)号：WO1994013042A1

公开(公告)日：1994-06-09

申请号：PCT/US1993011650

申请日：1993-12-01

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  PIDGEON, Rezin, E., Jr. ,  MARTIN, Grover, H.

IPC: H01S03/00

CPC classification number: H01S5/042

Abstract: A broadband matching network (220) closely matches the output impedance of a broadband amplifier to the input impedance of a laser over a broad frequency band to facilitate efficient transfer of power therebetween. As a result, the broadband amplifier does not have to generate high output power levels that cause intermodulation distortion. The matching network includes a pair of matching transformers having toroidal cores (510) and a filter circuit (430, 435, 420, 425, 440 and 445).

Abstract translation: 宽带匹配网络（220）将宽带放大器的输出阻抗与宽频带上的激光器的输入阻抗紧密匹配，以便有效地传递功率。 结果，宽带放大器不必产生引起互调失真的高输出功率电平。 匹配网络包括具有环形磁芯（510）和滤波器电路（430,435,420,425,440和445）的一对匹配变压器。

公开(公告)号：WO1993026129A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005559

申请日：1993-06-10

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  PARIKH, Himanshu ,  RUSTAGI, Vibha ,  BORSETTI, Paul, Jr. ,  THATCHER, W., Brad

IPC: H04N07/167

CPC classification number: H04N7/17354

Abstract: A diagnostic method and apparatus for a cable television interdiction system is provided. One or more diagnostic modes each corresponding to a particular problem or state associated with the interdiction unity may be entered into by the interdiction unit. The cycle of disabling the television signal provided to the receiving apparatus and pulsing either or both the television signal provided to the receiving apparatus and/or the LED is repeated until a transaction is received from the headend cancelling the diagnostic mode. Thus, the pulsing of the television signal provided to the receiving apparatus alerts the user of the receiving apparatus that a problem has occurred to the interdiction unit, and this information may be provided by the user to the cable television operator. Likewise, the pulsing LED coupled to the interdiction unit may alert a technician working on the interdiction unit as to the cause of the problem. In a preferred embodiment, the LED may be located on a tamper override module (TOM) (400) inserted into the interdiction unit by a technician in order to service the interdiction unit.

公开(公告)号：WO1993026127A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005504

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ROBERTSON, Neil, Charles ,  SCHUTTE, Mark, E.

IPC: H04N07/167

CPC classification number: H04K3/825 ,  H04K3/41 ,  H04K3/42 ,  H04K3/43 ,  H04K2203/14 ,  H04N7/166

Abstract: Each subscriber module circuit comprises a plurality of latches (322) each of which is associated with one of a plurality of digital to analog converters (324). Each of the digital to analog converters (324) drives one or more frequency agile oscillators (326) with its analog output to generate the jamming signals. The subscriber module is based on a sequential state machine which loads frequency control words corresponding to the jammed channels from a frequency control memory (320) into each latch (322) on a cyclic basis. In this manner, the jamming signals generated by each latch (322), digital to analog converter (324), and oscillator (326) combination can be varied easily and quickly by a memory to memory transfer and be sustained between frequency hops without any change in frequency. The circuitry lends itself easily to large scale integration and miniaturization while eliminating the need to refresh the circuit to prevent frequency change because of voltage drop.

Abstract translation: 每个用户模块电路包括多个锁存器（322），每个锁存器与多个数模转换器之一相关联。 每个数模转换器（324）用其模拟输出驱动一个或多个频率捷变振荡器（326）以产生干扰信号。 订户模块基于顺序状态机，其将循环的来自频率控制存储器（320）的对应于卡塞通道的频率控制字加载到每个锁存器（322）中。 以这种方式，每个锁存器（322），数模转换器（324）和振荡器（326）组合产生的干扰信号可以通过存储器容易且快速地改变到存储器传输，并且可以在跳频之间维持而无任何改变 频率。 该电路很容易实现大规模集成和小型化，同时不需要刷新电路以防止由于电压降而引起的频率变化。

公开(公告)号：WO1993026126A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005495

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  THATCHER, William, B. ,  SCHUTTE, Mark, E.

IPC: H04N07/167

CPC classification number: H04K3/825 ,  H04K3/41 ,  H04K3/42 ,  H04K2203/14 ,  H04N7/166

Abstract: An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal. The subscriber module is based on a sequential state machine (432) which loads frequency control words corresponding to the jammed channels from a frequency control memory (404) into each latch (406-412) on a cyclic basis. In addition, according to one illustrated implementation, the loading of frequency control words to the latches (406-412) in the sequence can be inhibited without changing the words in the memory. The sequential state machine (432) will then in effect skip the deauthorized frequency control words and produce jamming signals at the previous frequencies. This provides flexibility in the system for either jamming or unjamming a specific channel to a subscriber for short periods of time. This allows a simple authorization and deauthorization technique (428) without having to reload the frequency control memory or recalibrate a frequency control word for the specific channel selected.

Abstract translation: 一种用于阻止宽带有线电视信号的未授权频道的外部方法和装置。 订户模块基于顺序状态机（432），其循环地将来自频率控制存储器（404）的对应于卡塞通道的频率控制字加载到每个锁存器（406-412）中。 此外，根据所示的实施方式，可以禁止将频率控制字加载到序列中的锁存器（406-412），而不改变存储器中的字。 然后，顺序状态机（432）实际上将跳过去授权的频率控制字并产生先前频率的干扰信号。 这在系统中提供了在短时间内对用户进行干扰或解除特定频道的灵活性。 这允许简单的授权和取消授权技术（428），而不必重新加载频率控制存储器或重新校准用于所选择的特定频道的频率控制字。

公开(公告)号：WO1993010637A1

公开(公告)日：1993-05-27

申请号：PCT/US1992009841

申请日：1992-11-17

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ISRAELSEN, Paul, D. ,  LUCAS, Keith

IPC: H04N07/13

CPC classification number: G10L19/038 ,  G06T9/008 ,  H04N5/765 ,  H04N7/10 ,  H04N19/94

Abstract: A method and apparatus wherein fixed-rate vector quantized data is transmitted from a first location (12) to a second location (14) via a first medium (18). The fixed-rate vector quantized data is received at the second location (14) and transformed (28) to variable-rate vector quantized data. Then, the transformed variable-rate vector quantized data is transmitted (30) to a third location (32) via a second medium. At the third location, the variable rate vector quantized data may be received, and if desired, transformed back to fixed-rate form (34). A distortion adaptive vector quantization method is employed to transform the fixed rate vector quantization data to variable rate vector quantization data.

公开(公告)号：WO1993010624A2

公开(公告)日：1993-05-27

申请号：PCT/US1992009996

申请日：1992-11-17

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ISRAELSEN, Paul, D.

IPC: H04N0

CPC classification number: G06T9/008 ,  H04N19/154 ,  H04N19/39 ,  H04N19/60 ,  H04N19/94

Abstract: A distortion adaptive vector quantization method is employed to select, for each input vector, several codevectors from a tree structured codebook. The first codevector defines a basis signal, and each subsequent codevector defines an enhancement signal. The basic signal is indicative of the full codebook address from which the first codevector was selected. Each enhancement signal is indicative of only so much of the additional address bits that are required, in combination with the basic signal, to identify the address of the codebook from which the subsequent codevectors were selected. The basic signal and each enhancement signal are transmitted to a decoder which may employ only the basic signal, or the basic signal and one or more of the enhancement signals to reproduce the input vector. The reproduction quality of the input vector increases with the number of enhancement signals chosen.

Abstract translation: 依赖于失真的矢量量化方法使得可以为每个输入矢量从树结构编码表中选择多个编码矢量。 第一编码矢量定义基本信号，并且每个后续编码矢量定义增强信号。 基本信号给出了从中选择第一编码矢量的编码表的完整地址的指示。 每个增强信号仅指示与基本信号相结合所需的附加地址比特的数量，该附加地址比特标识出编码表格的地址，从该编码表格开始，跟随第一编码矢量的编码矢量 选择。 基本信号和每个增强信号被发送到只能使用基本信号或基本信号和一个或多个增强信号来再现输入矢量的解码器。 输入矢量的再现质量随着所选增强信号的数量而增加。

公开(公告)号：WO1993005619A1

公开(公告)日：1993-03-18

申请号：PCT/US1992007325

申请日：1992-09-03

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  SKROBKO, John

IPC: H04N07/22

CPC classification number: H04N7/173 ,  H04N7/22

Abstract: A fiber optic status monitoring system for a fiber optic cable television system is disclosed in which a computer serially polls a plurality of optical transmitter modules, optical receiver modules, or other cable television component modules to determine their operation. Each of the monitored components at a given location are connected together by a common bus. In addition, each of the transmitter modules and the receiver modules include a monitoring/control unit. The computer transmits a command signal to an interface unit. The interface unit transmits the command signal to the transmitter modules via a bus. The command signal is modulated at the interface unit and transmitted over a bidirectional link. The modulated command signal is received and demodulated by a status monitoring interface unit. The status monitoring interface unit distributes the command signal to each of the monitored modules at that location. If the command signal is a query command signal, a monitoring unit transmits information on the operation of the module. If the command signal is a control command signal, a monitoring unit serves to supply control signals to the module.

Abstract translation: 公开了一种用于光纤电缆电视系统的光纤状态监视系统，其中计算机连续轮询多个光发射器模块，光接收器模块或其它有线电视组件模块以确定其操作。 每个受监视的组件通过公共总线连接在一起。 另外，发射机模块和接收机模块中的每一个包括监控/控制单元。 计算机向接口单元发送命令信号。 接口单元通过总线将命令信号发送到发射机模块。 命令信号在接口单元处被调制，并通过双向链路传输。 调制的命令信号由状态监视接口单元接收和解调。 状态监视接口单元将命令信号分配到该位置处的每个监视模块。 如果命令信号是查询命令信号，则监视单元发送关于模块的操作的信息。 如果命令信号是控制命令信号，则监视单元用于向模块提供控制信号。

公开(公告)号：WO1992010038A1

公开(公告)日：1992-06-11

申请号：PCT/US1991008922

申请日：1991-11-26

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  HARNEY, Michael, P. ,  PARIKH, Himanshu, R. ,  WEST, Lamar, E., Jr. ,  FARMER, James, O. ,  SCHUTTE, Mark, J.

IPC: H04H01/02

CPC classification number: H04N7/17354 ,  H04H60/22 ,  H04H60/97 ,  H04K3/41 ,  H04K3/42 ,  H04K3/825 ,  H04K2203/14 ,  H04N7/166

Abstract: A CATV system includes a headend (10) which transmits programming including pay-per-view programming and a cable distribution system which distributes the programming. Service providing equipment (20) is coupled to the cable distribution system for supplying the programming to at least one subscriber. A subscriber terminal (500) is coupled to the service providing equipement (20) over a communication link. The subscriber terminal (500) includes an input device (520) for inputting subscriber-supplied signals indicative of a pay-per-view event to generate a message. A transmitter (540) responsive to the subscriber-supplied signals transmits the message to the service providing equipment (20) over the communication link. The service providing equipment (20) includes a service apparatus (400) coupled between first and second diplexers (295; 395). The diplexers (295; 395) separate the transmission path between the headend (10) and the subscriber terminal into downstream or forward and upstream or reverse transmission paths.

Abstract translation: CATV系统包括头端（10），其传送包括按次付费节目的节目以及分发节目的电缆分配系统。 服务提供设备（20）耦合到电缆分配系统，用于将编程提供给至少一个用户。 用户终端（500）通过通信链路耦合到服务提供设备（20）。 用户终端（500）包括输入设备（520），用于输入表示按次付费事件的用户提供的信号以生成消息。 响应于用户提供的信号的发射机（540）通过通信链路将消息发送到服务提供设备（20）。 服务提供设备（20）包括耦合在第一和第二双工器（295; 395）之间的服务设备（400）。 双工器（295; 395）将前端（10）和用户终端之间的传输路径分离成下行或前向和上行或反向传输路径。