公开(公告)号：WO1994010775A1

公开(公告)日：1994-05-11

申请号：PCT/US1993010491

申请日：1993-11-01

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04K01/02

CPC classification number: H04H20/28 ,  H04N7/1675 ,  H04N7/17318 ,  H04N7/20 ,  H04N21/2221 ,  H04N21/2347 ,  H04N21/23608 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2365 ,  H04N21/4345 ,  H04N21/4347 ,  H04N21/4405 ,  H04N21/6332

Abstract: A plurality of digital services (V'1-V'N' and A'1-A'N') are carried in a multiplex data stream (162) to a plurality of remote locations. The multiplex data stream (162) comprises a continuous sequence of frames (156). Each frame (156) comprises two consecutive fields, and each field comprises a plurality of lines. A first group of the lines in each field defines a transport layer region of that field, and a second group of the lines defines a service data region. Portions of the service data region of each field are allocated to respective ones of the video services in proportion to respective data rates of each service. A multiplex control packet is generated (104) for each field that specifies, for each service, which portion of the service data region is allocated to that service. A multiplex map (104) is transmitted with each field, and therefore, the number and location of packets may be dynamically adjusted on a per field basis.

Abstract translation: 多个数字服务（V'1-V'N'和A'1-A'N'）在多路复用数据流（162）中被携带到多个远程位置。 复用数据流（162）包括连续的帧序列（156）。 每个帧（156）包括两个连续的场，并且每个场包括多个行。 每个字段中的第一组行定义该字段的传输层区域，并且第二组行定义服务数据区域。 每个视频服务的服务数据区域的部分按照每个服务的相应数据速率的比例分配给视频服务的相应的一部分。 为每个字段生成多路复用控制分组（104），对于每个服务，为服务数据区域的哪个部分分配给该服务。 与每个字段一起发送复用映射（104），因此可以在每个字段的基础上动态地调整数据包的数量和位置。

公开(公告)号：WO1993026130A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005560

申请日：1993-06-10

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04N07/167

CPC classification number: H04N7/17354

Abstract: Apparatus for broadband signal distribution is equipped with a detector (555) for detecting when the apparatus is open and is further adapted to receive an entry code generator. If the entry code generator is not installed or, if installed, fails to generate an entry code which matches an authorized entry code stored in the apparatus, the apparatus enters a particular mode of operation whereby service provided by the apparatus is interfered with. The entry code generator comprises a circuit board for coupling with an electrical connector of the apparatus having at least one ear which precludes closure of a cover to the apparatus. A method of screening access to the apparatus from others than authorized service personnel includes waiting a predetermined period of time for coupling the access code generator before service is interfered with. Furthermore, the stored access code may be changed or the predetermined time varied by addressable command from a headend of a broadband signal distribution system.

公开(公告)号：WO1993026123A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005477

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  SHUTTE, Mark, E. ,  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 into each latch (406-412) on a cyclic basis. The basis cycle of the jamming machine includes the blanking of the frequency agile oscillator, the loading of a frequency control word into an associated latch and digital to analog converter (414-422) to hop the oscillator to the next frequency, and then the unblanking of the oscillator to generate the new frequency. The state machine is adapted to vary the hopping rate, the frequency at which the system moves from channel to channel, to provide flexibility in providing various jamming effectiveness. The hopping rate is programmable and addressable and can be adjusted over a considerable range without affecting the substantially constant blanking period between hops.

Abstract translation: 订户模块基于顺序状态机，其将周期性地将来自频率控制存储器的对应于干扰信道的频率控制字加载到每个锁存器（406-412）中。 干扰机的基本周期包括频率敏捷振荡器的消隐，将频率控制字加载到相关联的锁存器和数模转换器（414-422）中，以将振荡器跳到下一个频率，然后将非空白 的振荡器产生新的频率。 状态机适于改变跳频率，系统从频道向频道移动的频率，以提供提供各种干扰效果的灵活性。 跳频率可编程和可寻址，并且可以在相当大的范围内进行调整，而不会影响跳数之间的基本恒定的消隐周期。

公开(公告)号：WO1993026122A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005476

申请日：1993-06-09

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  STIRLING, Ronald, C. ,  SCHUTTE, Mark, E. ,  ROBERTSON, Neil, C.

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 cable television. Each subscriber module is programmable and addressable to adjust the jamming parameters of that subscriber independently of other subscribers. The subscriber module loads frequency control words corresponding to the jammed channels from a frequency control memory (404) into each latch (406-412) on a cyclic basis. The state machine (432) is adapted to vary the sequence in which frequency control words are read out of the memory (404) to modify the jamming pattern. Corresponding to each frequency control word in the memory is stored one or more mode control bits (444) which are read out contemporaneously with the frequency control words. The mode control bits (444) are used to allow a single digital to analog converter to control one or more voltage control oscillators with different frequency ranges, or to allow control of a single voltage control oscillator with multiple frequency ranges.

公开(公告)号：WO1993026121A1

公开(公告)日：1993-12-23

申请号：PCT/US1993005021

申请日：1993-06-01

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  EDWARDS, Robert, J. ,  DURDEN, Gregory, S. ,  PARIKH, Himanshu ,  BORSETTI, Paul, Jr. ,  RUSTAGI, Vibha

IPC: H04N07/167

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

Abstract: A method and apparatus of providing periodic subscription television services where a microprocessor (300) controls a service denying switch (389) and a high frequency amplifier (387) such that service may be denied using the service denying switch (389) or the high frequency amplifier (387). In addition, the high frequency amplifier (387) may be set by the microprocessor (300) at various amplitude levels depending upon the number of television receivers and VCR's at the subscriber location. Also, the high frequency amplifier (387) may include bandpass filter circuits under microprocessor control for limiting service to the subscriber.

公开(公告)号：WO1993022851A1

公开(公告)日：1993-11-11

申请号：PCT/US1993003810

申请日：1993-04-28

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04H01/00

CPC classification number: H04N7/104 ,  H03H7/461 ,  H04H20/78

Abstract: A combination surge and diplex filter is provided for a CATV distribution amplifier. In a first preferred implementation, an integrated surge and high pass filter section (40) is provided when the CATV amplifier is used only in the forward direction. Provision is made for a plug-in low pass filter section (45) which is matched to the high pass filter section (40). The plug-in low pass section (45) is used to form a diplex filter if the reverse direction capability of the CATV system is required from the distribution amplifier. In a second preferred implementation, the integrated surge and high pass filter section is segmented into a surge filter segment which is designed as a divisible part of the high pass filter section.

Abstract translation: 为CATV分配放大器提供组合浪涌和双工滤波器。 在第一优选实施例中，当CATV放大器仅在向前方向上使用时，提供集成浪涌和高通滤波器部分（40）。 规定了与高通滤波器部分（40）匹配的插入式低通滤波器部分（45）。 如果要求分配放大器需要CATV系统的反方向性能，则插入式低通部分（45）用于形成双工滤波器。 在第二优选实施例中，集成浪涌和高通滤波器部分被分段为被设计为高通滤波器部分的可分割部分的浪涌滤波器段。

公开(公告)号：WO1993019549A1

公开(公告)日：1993-09-30

申请号：PCT/US1993002238

申请日：1993-03-16

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  MYERS, Howard, L. ,  JOHNSON, Lee, R.

IPC: H04L09/00

CPC classification number: H04L9/0891 ,  H04L9/3226 ,  H04L2209/56 ,  H04N7/1675

Abstract: A system and method for using two simple transactions to enable the disconnection of unauthorized receiver terminals (108). This is accomplished in accordance with the invention by sending an addressed transaction to every known valid receiver terminal (108), giving each one the current authorization code. After this command has been sent several times to each valid receiver terminal (108), a global transaction is sent to all terminal containing the current and previous authorization codes. If any receiver terminal (108) receiving this transaction does not find a match between its stored authorization code it will deauthorize itself. Once into the transmission cycle (306, 308), and either of the transmitted authorization codes, it will deauthorize itself. Once into the transmission cycle, the current authorization code will become the previous authorization code and a new authorization code will be generated. The global command will be sent periodically while all the valid receiver terminals (108) are updated with the new authorization code.

公开(公告)号：WO1993011638A1

公开(公告)日：1993-06-10

申请号：PCT/US1992010108

申请日：1992-11-30

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  BANKER, Robert, O. ,  BACON, Kinney, C. ,  BAGLEY, Julius, B.

IPC: H04N07/16

CPC classification number: H04N7/165

Abstract: A subscriber terminal apparatus for a television in an in-band subscription television system is provided. The subscriber terminal is adapted to receive a television signal including video, audio, and data information. A tuner of the subscriber terminal tunes channels of the television signal and an on-screen display control circuit selectively provides a display of characters on the television. A tuner control tunes the tuner to a channel having in-band data when the display of characters is provided on the television.

公开(公告)号：WO1993010628A1

公开(公告)日：1993-05-27

申请号：PCT/US1992010236

申请日：1992-11-17

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04N05/21

CPC classification number: H04N7/012 ,  H04N5/144 ,  H04N19/112 ,  H04N19/132 ,  H04N19/587 ,  H04N19/80

Abstract: A method and apparatus for processing fields (XA, XB, XC) of a video signal that are to be combined (28) into a frame, compressed and communicated over a digital communications system. The processing technique increases the spatial correlation between pixels at a cost of slightly reduced resolution in area of the frame where there is movement. The method employs a motion detector (14, 16, 18) to separate moving and non-moving areas of the frame. A simple combination of lines from a first field and second field can be used in static areas. In moving areas, a digital filter (20) is applied to the fields to increase correlation in the resulting field. A digital compression technique such as vector quantization is applied to the resulting frame-based signal.

公开(公告)号：WO1993010606A1

公开(公告)日：1993-05-27

申请号：PCT/US1992009963

申请日：1992-11-18

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, C., Jr. ,  BURLESON, David, B. ,  HUNTLEY, Donald, R. ,  SCHAUBS, Randolph, J.

IPC: H04H01/04

CPC classification number: H04H40/90 ,  H04H20/30 ,  H04H20/79 ,  H04H60/15 ,  H04H60/23 ,  H04H2201/70 ,  H04N7/10 ,  H04N21/2365 ,  H04N21/4347

Abstract: A headend method and apparatus for a digital transmission system is provided which includes inputs for receiving first and second program information from first and second program sources and inputs for receiving first and second control information from first and second control sources. The first and second program information is applied to a switching circuit and a switch control controls the switching circuit to output channels of program information comprising combinations of the first and second program information for output to a subscriber. Processing circuitry allows for selectively providing the first and second control information to the channels output from the switching circuit.

Abstract translation: 提供了一种用于数字传输系统的前端方法和装置，其包括用于从第一和第二节目源接收第一和第二节目信息的输入以及用于从第一和第二控制源接收第一和第二控制信息的输入。 第一和第二节目信息被应用于切换电路，并且开关控制控制切换电路以输出包括第一和第二节目信息的组合的节目信息的频道，以输出到用户。 处理电路允许选择性地将第一和第二控制信息提供给从开关电路输出的通道。