公开(公告)号：WO1994010802A1

公开(公告)日：1994-05-11

申请号：PCT/US1993010527

申请日：1993-11-02

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, J. ,  BAGLEY, Julius, B.

IPC: H04N07/167

CPC classification number: H04N21/2362 ,  H04N7/1675 ,  H04N21/2221 ,  H04N21/2347 ,  H04N21/23608 ,  H04N21/23614 ,  H04N21/2365 ,  H04N21/4345 ,  H04N21/4347 ,  H04N21/4405 ,  H04N21/6332

Abstract: A system and method for multiplexing a plurality of digital programs for transmission to a plurality of remote locations is claimed (20). An encoder (16) is provided that first generates a plurality of subframe data streams (60) each comprising a continuous sequence of subframes. For each subframe data stream, portions of the program data region of each of the subframes in that subframe data stream are allocated to selected ones of the plurality of programs. Mapping information is provided in the transport layer region of each subframe for use by a decoder in extracting a selected program from each subframe. A multiplex data stream is then generated at the encoder that comprises a continuous sequence of superframes (66). A portion of the subframe data region of each superframe is allocated to at least one subframe from each of the plurality of subframe data streams. The multiplex data stream is then transmitted to the plurality of remote locations.

Abstract translation: （20）要求保护用于将多个用于传输的数字节目复用到多个远程位置的系统和方法。 提供了一种编码器（16），其首先产生多个子帧数据流（60），每个子帧数据流包括连续的子帧序列。 对于每个子帧数据流，将该子帧数据流中的每个子帧的节目数据区的部分分配给多个节目中的选定节目。 在每个子帧的传输层区域中提供映射信息，供解码器从每个子帧提取所选择的节目。 然后在包括超帧的连续序列的编码器处生成复用数据流（66）。 每个超帧的子帧数据区域的一部分被分配给多个子帧数据流中的每一个的至少一个子帧。 然后将多路复用数据流发送到多个远程位置。

公开(公告)号：WO1993026125A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005488

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04N07/167

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

Abstract: 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 (404) into each latch on the cyclic basis. The state machine is adapted to modify the sequence in which the frequency control words are read out memory to vary the jamming pattern of the subscriber. The addresses of the memory are read out in a pseudo-random sequence to produce varying jamming patterns but without changing a selected jamming factor for a selected group of channels. The pseudo-random pattern is generated by logically combining (403) a predetermined address sequence with a random number seed from a seed generator. The random number seed can be varied either programmably or addressably to generate other pseudo-random jamming patters. In another implementation the seed generator will evenly distribute the jamming energy of unused time slots to all the other active time slots.

Abstract translation: 用户模块基于顺序状态机，该循环状态机将周期性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中。 状态机适于修改频率控制字读出存储器的顺序，以改变用户的干扰模式。 以伪随机序列读出存储器的地址以产生变化的干扰模式，但是不改变所选择的信道组的所选择的干扰因子。 通过将来自种子发生器的预定地址序列与随机数种子进行逻辑组合（403）来生成伪随机模式。 随机数种子可以可编程地或可寻址地改变以产生其他伪随机干扰模式。 在另一个实施方式中，种子发生器将将未使用的时隙的干扰能量均匀地分配给所有其他活动时隙。

公开(公告)号：WO1993019543A1

公开(公告)日：1993-09-30

申请号：PCT/US1993002261

申请日：1993-03-16

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04J03/00

CPC classification number: H04N21/2383 ,  H04B7/18523 ,  H04H20/28 ,  H04H20/79 ,  H04N5/4401 ,  H04N5/765 ,  H04N7/10 ,  H04N7/16 ,  H04N7/22 ,  H04N19/89 ,  H04N21/2365 ,  H04N21/4347 ,  H04N21/4382

Abstract: A digital audio communication system (8) includes a digital modulation and demodulation scheme which efficiently uses the bandwidth and channel spacing of a cable television system. A 30 channel digital bit stream is demultiplexed (71) into six groups of five channels. Each group modulates a carrier by quadrature partial response (QRP) process. The demodulators (125) are of the decision feedback type. The decision feedback decoding is implemented in simple current nodes where a bilevel output from the decoded data is subtracted from a tertiary level output of a mixer. The error voltage is generated by differencing the outputs of two analog switches which have as their inputs analog signals representative of the amplitude level of the data and its inverse of one phase. The sign of the data bit of the opposite phase is used to control the switch and thus select which signal is used.

Abstract translation: 数字音频通信系统（8）包括有效地使用有线电视系统的带宽和信道间隔的数字调制和解调方案。 30通道数字比特流被解复用（6）成5组通道。 每组通过正交部分响应（QRP）处理来调制载波。 解调器（125）具有判决反馈类型。 决策反馈解码在简单的电流节点中实现，其中来自解码数据的双向输出从混频器的第三级输出中减去。 误差电压通过差分两个模拟开关的输出产生，这两个模拟开关的输入具有代表数据幅度电平的模拟信号及其一相的反相。 反相位数据位的符号用于控制开关，从而选择使用哪个信号。

公开(公告)号：WO1992017010A1

公开(公告)日：1992-10-01

申请号：PCT/US1992002224

申请日：1992-03-19

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04H01/02

CPC classification number: H04N7/17309 ,  H04H20/38 ,  H04H20/42 ,  H04H60/22 ,  H04H60/96 ,  H04H60/97 ,  H04H2201/70 ,  H04L5/06 ,  H04L27/2035 ,  H04L27/2276 ,  H04N7/10 ,  H04N21/25891 ,  H04N21/44222

Abstract: A method for automatically selecting optimum frequencies for transmitting data from remote terminals (120, 315a-315c) upstream to a system manager (310) is provided. The system manager (310) initially selects a set of frequencies from a larger set of available frequencies and transmits a comand downstream to each remote terminal (120, 315a-315c) indicating which frequencies to use. Each remote terminal (120, 315a-315c) transmits data messages on each selected frequency in response to addressed commands generated by the system manager (310). The system manager (310) receives and counts the data messages on each of the frequencies, and, after a statistically significant number of messages are received, removes from use the frequency with the lowest number of data messages received. This frequency is replaced with either (1) a previously untried frequency, or if all frequencies have been tried, (2) a previously tried frequency with the highest number of data messages received.

Abstract translation: 提供了一种用于自动选择从上游向系统管理器（310）的远程终端（120,315a-315c）发送数据的最佳频率的方法。 系统管理器（310）最初从更大的一组可用频率中选择一组频率，并向下游发送指示要使用哪些频率的每个远程终端（120,315a-315c）的信号。 每个远程终端（120,315a-315c）响应于由系统管理器（310）生成的寻址命令，在每个选定频率上发送数据消息。 系统管理器（310）接收并对每个频率上的数据消息进行计数，并且在接收到统计上显着数量的消息之后，从接收到的数据消息的数量最少的频率中删除。 该频率被替换为（1）以前未经测试的频率，或者如果已经尝试所有频率，则（2）先前尝试的接收到数据消息数最多的频率。

公开(公告)号：WO1992010040A1

公开(公告)日：1992-06-11

申请号：PCT/US1991008920

申请日：1991-11-26

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  ROVIRA, Luis, A. ,  WALL, William, E., Jr.

IPC: H04J03/00

CPC classification number: H04H20/28 ,  H04B7/18523 ,  H04H20/63 ,  H04H20/78 ,  H04H20/79 ,  H04H20/81 ,  H04H20/84 ,  H04H20/91 ,  H04H40/27 ,  H04H60/23 ,  H04H60/74 ,  H04N5/4401 ,  H04N5/765 ,  H04N7/16 ,  H04N21/23614 ,  H04N21/23895 ,  H04N21/2665 ,  H04N21/42207 ,  H04N21/42209 ,  H04N21/42225 ,  H04N21/4348 ,  H04N21/43853 ,  H04N21/8113 ,  H04N21/84

Abstract: An apparatus and method is described for transmitting, receiving and communicating program data signals which are combined with digital data signals. Preferably, the present invention compresses 30 digital audio signals (10-1 - 10-n), multiplexes them with title, track, artist, record label, year, etc., program information (20-1 - 20-m and 30-1 - 30-K) and transmits the combined signals via satellite (50) to a receiving station (60). The receiving station demultiplexes (70) the signals and sends them via a cable distribution system to a subscriber's digital music tuner (100). This tuner further demultiplexes (143) and decodes (147) the signals so that the digital audio signals may be converted to analog (160) and output for listening, while the corresponding data signals are communicated to the subscriber. In an alternative preferred embodiment, the program data signals are transmitted to a remote control receiver (200) where they are displayed. The system described in the present invention may be used for transmitting video, software or games with program data to subscribers.

公开(公告)号：WO1991014312A1

公开(公告)日：1991-09-19

申请号：PCT/US1991001568

申请日：1991-03-07

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  CURRIE, Charles, H. ,  CALDWELL, Owen, M.

IPC: H04B01/26

CPC classification number: H04B1/0007 ,  H03D7/161 ,  H04B1/0003 ,  H04B1/26

Abstract: An offset frequency converter (10) for the intermediate frequency (IF) stages of a multi-channel radio frequency (RF) phase/amplitude measurement receiver (8). The converter allows use of noncoherent transmitter and receiver local oscillator sources which utilize digital frequency synthesizers and enables harmonic mixing to be employed. The converter samples an incoming first intermediate frequency signal IF1 in a reference channel (38b). The IF1 sample is then upconverted to a higher frequency, filtered and downconverted to an IF1+IF2 signal offset from the IF1 sample by a lower second intermediate frequency IF2. The added frequency offset IF2 is derived from a time stabilized source independent of the transmitter but coherent with the receiver LO. The mixed IF1+IF2 signal is heterodyned with signals in both the signal channel (38a) from the antenna under test and the reference channel to obtain coherent outputs at IF2 which differ by phase and magnitude corresponding to the characteristics of the antenna under test.

公开(公告)号：WO1990013973A1

公开(公告)日：1990-11-15

申请号：PCT/US1990002245

申请日：1990-04-27

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  MURPHY, William, T. ,  FARMER, James, O. ,  WEST, Lamar, E., Jr.

IPC: H04N07/167

CPC classification number: H04N7/1713 ,  H04N7/1716

Abstract: The invention is directed to an improved scrambler capable of self-calibrating output signals. In one embodiment, the scrambler provides an encoded signal along separate signal pulses. A portion of one signal is made to correspond to a portion of another signal to thereby self-calibrate the signals. Also, portions of the incoming video signal are forced to correspond with internally generated voltage level signals.

Abstract translation: 本发明涉及能够自校准输出信号的改进的加扰器。 在一个实施例中，加扰器沿着分离的信号脉冲提供经编码的信号。 使一个信号的一部分对应于另一个信号的一部分，从而自校准信号。 此外，输入视频信号的一部分被强制对应于内部产生的电压电平信号。

公开(公告)号：WO1990013088A1

公开(公告)日：1990-11-01

申请号：PCT/US1990002033

申请日：1990-04-19

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: G06F15/24

CPC classification number: G07F17/0014 ,  G06Q10/087 ,  G07F9/02 ,  H04N5/44543 ,  H04N7/0884 ,  H04N7/0888 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/173 ,  H04N7/17318 ,  H04N21/2143 ,  H04N21/2543 ,  H04N21/47202 ,  H04N21/478

Abstract: A cable television transaction terminal comprises a keyboard for entry of selection and field completion data and a teletext screen generator for actuating a visual display of teletext screens comprising selection items or completion fields. Each screen is uniquely identified and stored in terminal memory prior to display with an associated key template for defining selection and field completion data. A review of transactions is actuated by display of a first teletext screen and entry of an associated key response. Payment for transaction is actuated by display of a second teletext screen and entry of an associated key response. For example, a hotel guest may check out of a hotel room without visiting the front desk via the cable television terminal in his room or order room service for delivery at a particular time.

Abstract translation: 有线电视交易终端包括用于输入选择和现场完成数据的键盘和用于启动包括选择项目或完成字段的图文电视屏幕的视觉显示的图文电视屏幕生成器。 在显示之前，每个屏幕被唯一标识并存储在终端存储器中，并具有用于定义选择和字段完成数据的关联的键模板。 通过显示第一图文电视屏幕和相关键响应的输入来启动交易审查。 通过显示第二图文电视屏幕并输入相关的键响应来启动交易支付。 例如，酒店客人可以通过客房内的有线电视终端或特定时间的客房服务来查看酒店客房，无需前台前台。

公开(公告)号：WO1997047093A1

公开(公告)日：1997-12-11

申请号：PCT/US1997009554

申请日：1997-06-02

Applicant: SCIENTIFIC-ATLANTA, INC. ,  BRICKELL, John, W. ,  NASH, Wayne, H.

Inventor： SCIENTIFIC-ATLANTA, INC.

IPC: H04B03/36

CPC classification number: H04B3/36 ,  H04B3/04 ,  H04N7/102 ,  H04N17/00

Abstract: An apparatus for indicating the configuration of a cable television line amplifier (26). The line amplifier contains a controller (70) that senses a preset voltage on a status indication line. When the amplifier is reconfigured, such as by adding new circuits containing new functions of features, these new circuits contain resisters that are shunted to modify the preset voltage level on the appropriate status indication line. The controller senses the modified voltages and provides an indication of the new function of the new circuit to a headend through a cable television distribution system.

Abstract translation: 一种用于指示有线电视线路放大器（26）的配置的装置。 线路放大器包含感测状态指示线上的预设电压的控制器（70）。 当重新配置放大器时，例如通过添加包含新功能功能的新电路，这些新电路包含被分流的电阻，以修改相应状态指示线上的预设电压电平。 控制器感测修改的电压，并通过有线电视分配系统向前端提供新电路的新功能的指示。

公开(公告)号：WO1997047081A1

公开(公告)日：1997-12-11

申请号：PCT/US1997008908

申请日：1997-05-27

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  VOGT, Stephan, W. ,  BRICKELL, John, A. ,  ACOSTA, Alfedo, E.

IPC: H03F01/30

CPC classification number: H03F1/302 ,  H03F1/307

Abstract: The present invention solves the gain, noise figure, and distortion problems of prior art thermal compensation circuits by incorporating a temperature-compensating circuit (10) in the feedback loop of a transistor amplifier (2) arrangement. Using this method, the insertion loss is reduced as the gain of the amplifier varies proportionately to the temperature. This method has a negligible effect on the noise figure and distortion. Furthermore, the present invention can be used in both single-ended (2) or push-pull dual amplifier (2, 4) configurations.

Abstract translation: 本发明通过将温度补偿电路（10）并入晶体管放大器（2）布置的反馈回路来解决现有技术的热补偿电路的增益，噪声系数和失真问题。 使用该方法，随着放大器的增益与温度成比例地变化，插入损耗减小。 该方法对噪声系数和失真的影响可以忽略不计。 此外，本发明可以用于单端（2）或推挽双放大器（2,4）配置中。