公开(公告)号：WO1996012351A1

公开(公告)日：1996-04-25

申请号：PCT/US1995012517

申请日：1995-10-12

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  GREEN, Brian, J.

IPC: H04B01/26

CPC classification number: H04N5/4446 ,  H04N7/104

Abstract: A filter diplexer (133) is provided for matching a filter (132) to a mixer (134) upconverting an intermediate frequency signal to an output signal by mixing the intermediate frequency signal with a local oscillator (152). The filter (132) filters the intermediate frequency before applying it to the mixer (134). A diplexer (133) is provided between the filter (132) and the mixer (134) for matching the impedance of the filter (132) to that of the mixer (134). The diplexer (133) includes an inductor (302) connecting the filter (132) to the mixer (134) and a capacitor (306) and a resistor (308) in series in shunt configuration with the inductor (302).

Abstract translation: 提供了一种滤波器双工器（133），用于通过将中频信号与本地振荡器（152）混合来将滤波器（132）与混频器（134）匹配，以将中频信号上变频到输出信号。 过滤器（132）在将其施加到混合器（134）之前对其进行过滤。 在过滤器（132）和混合器（134）之间提供了一个双工器（133），用于将过滤器（132）的阻抗与混合器（134）的阻抗相匹配。 双工器（133）包括将滤波器（132）连接到混频器（134）的电感器（302）和与电感器（302）串联配合的电容器（306）和电阻器（308）。

公开(公告)号：WO1995019076A1

公开(公告)日：1995-07-13

申请号：PCT/US1995000240

申请日：1995-01-03

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04H01/08

CPC classification number: H04H20/33 ,  H04H20/106 ,  H04H20/16 ,  H04H20/26 ,  H04H20/42 ,  H04H40/09 ,  H04H60/06 ,  H04H60/41 ,  H04N5/4401 ,  H04N5/50 ,  H04N7/088 ,  H04N7/16 ,  H04N7/162 ,  H04N7/1675 ,  H04N7/173 ,  H04N7/17318 ,  H04N7/20 ,  H04N7/52 ,  H04N21/23617 ,  H04N21/2362 ,  H04N21/26291 ,  H04N21/4345 ,  H04N21/4383 ,  H04N21/482 ,  H04N21/6118 ,  H04N21/6143

Abstract: Methods and apparatus are disclosed for providing program selection in a packet-based communications system. A program definition (110) is generated for each program (BS , BS , ...BS ) that specifies which of the elementary streams carried on a particular frequency channel comprise that program. The program definition for each program is periodically, and frequently, transmitted to each subscriber location (72, 74) on the frequency channel carrying the elementary streams of the selected program, extracts a program definition for the selected program from the tuned frequency channel, and then obtains from the frequency channel the elementary streams (V, A, CC) specified in the extracted program definition as comprising the selected program.

Abstract translation: 公开了用于在基于分组的通信系统中提供节目选择的方法和装置。 对于规定在特定频率信道上携带的基本流中的哪一个包括该程序的每个节目（BS <1>，BS <2>，... BS ）生成节目定义（110）。 每个节目的节目定义周期地并频繁地传送到携带所选节目的基本流的频道上的每个用户位置（72,74），从所调谐的频道中提取所选节目的节目定义，以及 然后从频道获得在提取的节目定义中指定为包括所选择的节目的基本流（V，A，CC）。

公开(公告)号：WO1995015640A1

公开(公告)日：1995-06-08

申请号：PCT/US1994013665

申请日：1994-12-05

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  D'SYLVA, Mark, J. ,  LAWRENCE, Steven, S. ,  STROTHER-STEWART, Robert

IPC: H04L27/30

CPC classification number: H04L27/00 ,  H04L27/2271

Abstract: At the Power On Reset mode of the receiver, the search mode (201) is entered and the tuner AFC is swept in a search for the QPSK carrier. In the detect signal step (202), a low OOS signal is sought. If the low OOS signal is not found, the false lock detect step (205) checks to see if the AFC voltage is remaining constant. If it is, then the loop is broken in the break loop step (206). In the break loop step (206), the loop is held open for about 20 milliseconds, then the search mode (201) is entered again.

Abstract translation: 在接收机的上电复位模式下，输入搜索模式（201），并在搜索QPSK载波​​时扫描调谐器AFC。 在检测信号步骤（202）中，寻找低OOS信号。 如果没有找到低OOS信号，则假锁定检测步骤（205）检查AFC电压是否保持不变。 如果是，则在断开循环步骤（206）中循环被破坏。 在中断循环步骤（206）中，循环保持打开约20毫秒，然后再次进入搜索模式（201）。

公开(公告)号：WO1995005043A1

公开(公告)日：1995-02-16

申请号：PCT/US1994008864

申请日：1994-08-04

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  GAMMIE, Keith ,  SHELDRICK, Wayne, S. ,  WOO, Arthur, S. ,  WASILEWSKI, Anthony, J.

IPC: H04L09/00

CPC classification number: H04H20/28 ,  H04B7/2041 ,  H04L9/16 ,  H04N7/163 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/26606 ,  H04N21/4405

Abstract: The encryption apparatus for encrypting each of a plurality of services (22) comprises a random signal generator (24), which generates a random quantity that comprises a global seed and a random seed. The encryption apparatus (22) further includes an SK memory (52), a seed encryptor (50), seed generators (38, 40, 42), service encryptors (26, 28, 30), a multiplexer (54), spreading function generators, and a transmitter (56).

Abstract translation: 用于加密多个服务（22）中的每一个的加密装置包括随机信号发生器（24），其生成包括全局种子和随机种子的随机数量。 加密装置（22）还包括SK存储器（52），种子加密器（50），种子生成器（38,40,42），服务加密器（26,28,30），多路复用器（54），扩展功能 发电机和发射机（56）。

公开(公告)号：WO1994030008A1

公开(公告)日：1994-12-22

申请号：PCT/US1994006340

申请日：1994-06-06

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BANKER, Robert, O. ,  ITH, Cham ,  BACON, Kinney, C. ,  BURLESON, David, B.

IPC: H04N05/262

CPC classification number: H04N21/4316 ,  G09G2340/12 ,  H04N5/272 ,  H04N5/44504 ,  H04N5/44513 ,  H04N5/44543 ,  H04N5/44591 ,  H04N5/45 ,  H04N7/088 ,  H04N7/16 ,  H04N7/161 ,  H04N21/2743 ,  H04N21/4104 ,  H04N21/4786 ,  H04N21/4788 ,  H04N21/488 ,  H04N21/4884 ,  H04N21/6547

Abstract: An on screen display system for a subscription television system includes a display processor (127) which can be preprogrammed by the control processor (128) with a plurality of display attributes including different symbol sets, color palettes, whether the screen is to comprise text, graphics, or a combination thereof, and the size and location of each screen display area. The display processor (127) includes a digital processor (302) which controls accessing of the display data from the memory and converting the data to timed digital pixels and an analog processor (300) with digital-to-analog converter (314), which produces analog pixels from the digital pixels in a timed relation to an input video signal, and multiplexer (316), which substitutes the analog pixels for the pixels of the input video signal when the display processor is active.

Abstract translation: 一种用于订阅电视系统的屏幕显示系统包括可由控制处理器（128）预编程的显示处理器（127），其具有包括不同符号组，调色板，屏幕是否包括文本的多个显示属性， 图形或其组合，以及每个屏幕显示区域的尺寸和位置。 显示处理器（127）包括数字处理器（302），该数字处理器（302）控制来自存储器的显示数据的访问并将数据转换为定时的数字像素，以及具有数模转换器（314）的模拟处理器（300） 以与输入视频信号的定时关系从数字像素产生模拟像素，以及多路复用器（316），当显示处理器处于活动状态时，其将模拟像素替换为输入视频信号的像素。

公开(公告)号：WO1994024826A1

公开(公告)日：1994-10-27

申请号：PCT/US1994001487

申请日：1994-02-16

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BEYERS, Robert, J., II ,  DURDEN, Gregory, S. ,  IVEY, M., Kent ,  KUBAN, Curt, M.

IPC: H04N07/167

CPC classification number: G06Q30/04 ,  H04H20/28 ,  H04H60/15 ,  H04H2201/70 ,  H04N1/00098 ,  H04N7/165 ,  H04N7/167 ,  H04N7/1675 ,  H04N7/17345 ,  H04N21/4786 ,  H04N21/4788

Abstract: A method of transmitting addressed messages to subscribers comprises the steps of defining the group or individual subscriber to be adddessed, creating the message, assigning the message to the individual or group to be addressed, scheduling the message from transmission, transmitting the message, and recording the transmission of the message. A system control computer (120), according to the present invention, comprises a billing computer interface for interfacing with a billing computer (110) and a user interface for providing access to messaging services to a system operator, each of the billing and user interfaces for providing data to a group queuing subsystem and a system event scheduler, respectively. The user interface further accesses a database, the database shared by the system event scheduler and message, device and group manager. The device manager in turn, when scheduled by the system event scheduler, coordinates the tansmission of addressed messages via either a headend controller (130) (via an inband channel) or an addressable data transmitter (via an out-of-band channel) (140).

Abstract translation: 向订户发送寻址消息的方法包括以下步骤：定义要添加的组或单个订户，创建消息，将消息分配给待寻址的个人或组，从传输调度消息，发送消息和记录 传输消息。 根据本发明的系统控制计算机（120）包括用于与计费计算机（110）接口的计费计算机接口和用于向系统操作者提供对消息传递服务的访问的用户界面，每个计费和用户界面 用于分别向组排队子系统和系统事件调度器提供数据。 用户界面还访问数据库，由系统事件调度程序和消息，设备和组管理器共享的数据库。 当由系统事件调度器调度时，设备管理器依次经由头端控制器（130）（经由带内通道）或可寻址数据发送器（经由带外频道）来协调寻址消息的传送（ 140）。

公开(公告)号：WO1994013101A1

公开(公告)日：1994-06-09

申请号：PCT/US1993011538

申请日：1993-11-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LUCAS, Keith

IPC: H04N05/262

CPC classification number: H04N21/4347 ,  H04N5/262 ,  H04N5/45 ,  H04N19/48 ,  H04N19/90 ,  H04N21/2365

Abstract: A method for generating a picture-in-picture digital television frame comprising the step of: converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels; deriving a mean-only frame (20) from the first digital frame, the mean-only frame comprising a second prescribed number of pixels; creating an insertion (50) frame on the basis of the mean-only frame; and inserting (40) the insertion frame into a second digital frame, thereby generating a picture-in-picture digital frame.

Abstract translation: 一种用于产生画中画数字电视帧的方法，包括以下步骤：将第一模拟电视信号转换成包括第一规定数量的像素的第一数字帧; 从所述第一数字帧导出仅平均帧（20），所述均值帧包括第二规定数量的像素; 基于均值帧创建插入（50）帧; 并将插入帧插入（40）到第二数字帧中，从而生成画中画数字帧。

公开(公告)号：WO1994003963A1

公开(公告)日：1994-02-17

申请号：PCT/US1993006797

申请日：1993-07-20

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H02M07/538

CPC classification number: H04N7/10 ,  H02M7/538 ,  H04B3/44 ,  H04H20/78

Abstract: A polarity reversing DC power inserter circuit (204) for other signal control apparatus used in a cable or community antenna television (CATV) signal distribution system. A power transformer circuit (210) receives a 117 volts AC power source at a subscriber's premise and converts it to a lower voltage positive and negative DC. A polar reversing circuit (204) comprising switching transistors (220, 221) and a 50 % duty cycle multivibrator (230) switches between the lower voltage DC at a frequency less than 10 Hz so as to avoid shock hazards associated with normal alternating current, while alternating sufficiently often to avoid electrolysis and corrosion problems associated with use of direct current (DC) a cable drop (115) to be provided uplink to the signal control apparatus. At the signal control apparatus, the polarity reversing DC is converted into DC by a power utilization circuit, and then utilized to power the signal control apparatus.

Abstract translation: 用于电缆或社区天线电视（CATV）信号分配系统中的其他信号控制装置的极性反转DC电力插入器电路（204）。 电力变压器电路（210）在用户的前提下接收117伏交流电源，并将其转换为较低电压正和负的DC。 包括开关晶体管（220,221）和50％占空比多谐振荡器（230）的极性反转电路（204）在小于10Hz的频率的低电压DC之间切换，以避免与正常交流电流相关的冲击危险， 同时充分交替地交替以避免与使用直流电（DC）相关的电解和腐蚀问题，以提供到信号控制装置的上行链路。 在信号控制装置中，极性反转DC由功率利用电路转换为DC，然后用于为信号控制装置供电。

公开(公告)号：WO1993026124A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005482

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  PARIKH, Himanshu, R. ,  HARNEY, Michael, P. ,  BORSETTI, Paul, Jr. ,  RUSTAGI, Vibha ,  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 includes common circuitry for adjusting the amplitude and equalization levels of the broadband (CATV) signals and one or more subscriber modules for generating jamming signals of different frequencies which are used to interdict one or more unauthorized channels. Each subscriber module (134) is associated with a subscriber and is programmable and addressable to adjust the jamming parameters of that subscriber independently of other subscribers. Each subscriber module circuit (224) 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 drives (300) one or more frequency agile oscillators (328) with its analog output to generate the jamming signals. The subscriber module (134) is based on a sequential state machine (400, 402) which loads frequency control words corresponding to the jammed channels from a frequency control memory into each latch on a cyclic basis.

公开(公告)号：WO1993019545A1

公开(公告)日：1993-09-30

申请号：PCT/US1993002262

申请日：1993-03-16

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, C., Jr. ,  JOHNSON, Lee, R.

IPC: H04L01/20

CPC classification number: H04N5/945 ,  G11B20/1806 ,  G11B20/1876 ,  G11B20/24 ,  H04L1/20 ,  H04N5/9265

Abstract: A system (222) and method for disabling the output of a data transmission system when a high error rate is detected. In the case of audio data, the output is disabled by muting. Error rate detection functions as a digital equivalent of a leaky integrator with hysteresis. A predetermined value (400) is added to an accumulator (406) when an error is detected. More serious errors are given greater values (402, 404). The accumulator is also decremented (410) at a programmable rate (408) that is proportional to the maximum acceptable error rate. The accumulator sum is continuously compared (414) to a programmable error threshold (412), and if the threshold is exceeded, the output of the data transmission system is disabled. The output is not re-enabled until the accumulator is decremented to a lower threshold. In one embodiment, the accumulator is decremented at a different rate (500) when the output is disabled.

Abstract translation: 一种当检测到高错误率时禁止数据传输系统的输出的系统（222）和方法。 在音频数据的情况下，通过静音禁用输出。 误差率检测功能作为具有迟滞的泄漏积分器的数字等效。 当检测到错误时，将预定值（400）添加到累加器（406）。 给出更严重的错误更大的值（402,404）。 累加器也以与最大可接受错误率成比例的可编程速率（408）递减（410）。 累加器和被连续地比较（414）到可编程错误阈值（412），如果超过阈值，则数据传输系统的输出被禁止。 在累加器递减到较低的阈值之前，输出不会被重新使能。 在一个实施例中，当禁用输出时，累加器以不同的速率（500）递减。