公开(公告)号：WO1997038464A1

公开(公告)日：1997-10-16

申请号：PCT/US1997003730

申请日：1997-03-14

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  COOK, James, H., Jr. ,  COOK, David, C. ,  DISHMAN, William, Keith

IPC: H01Q03/00

CPC classification number: H01Q19/028 ,  G01R29/10

Abstract: An apparatus for obtaining corrected antenna data includes a processor (40) and a compact range, the corrected antenna data containing co-polarization and cross-polarization properties of an antenna. The compact range defines a quiet zone (QZ) and has a reflector (12) and a feed (16), the reflector being characterized by a paraboloidal shape having a vertex point and focus point, the feed being located at the focus point and being characterized by a feed boresight pointed at the vertex point. The compact range further has a transmitter (20) coupled to the feed and a receiver (30) coupled between the antenna and the processor to provide a received signal to the processor. The processor determines aperture field data from the received signal, the aperture field data containing values based on properties of the compact range and the co-polarization and cross-polarization properties of the antenna. The processor further calculates theoretical field data, the theoretical field data characterizing the properties of the compact range. The processor further combines the aperture field data and the theoretical field data to provide the corrected antenna data.

Abstract translation: 用于获得校正的天线数据的装置包括处理器（40）和紧凑范围，所述校正的天线数据包含天线的共极化和交叉极化特性。 紧凑范围限定了安静区（QZ）并具有反射器（12）和进料（16），所述反射器的特征在于具有顶点和焦点的抛物面形状，所述进料位于焦点处，并且是 其特征在于指向顶点的进给视轴。 紧凑范围还具有耦合到馈电的发射器（20）和耦合在天线和处理器之间的接收器（30），以向处理器提供接收的信号。 处理器根据接收信号确定孔径场数据，孔径场数据包含基于紧凑范围的特性和天线的共极化和交叉极化特性的值。 处理器进一步计算理论场数据，表征紧凑范围特性的理论场数据。 处理器进一步组合孔径场数据和理论场数据以提供经校正的天线数据。

公开(公告)号：WO1997024832A1

公开(公告)日：1997-07-10

申请号：PCT/US1996013743

申请日：1996-08-22

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, John ,  WOODHEAD, Douglas, F. ,  LOGSTON, Gary, Lee

IPC: H04L09/14

CPC classification number: H04L63/0442 ,  H04J2203/008 ,  H04L63/045 ,  H04L63/062 ,  H04L63/12 ,  H04L2463/101 ,  H04N7/1675 ,  H04N7/17354 ,  H04N21/23476

Abstract: Methods and apparatus are described for ensuring that programs comprising at least one of video, audio, and data that are requested by a customer from a service provider (SP) (110) via an interactive information services system (10), which transmits the requested programs in program bearing packets to a set top unit (STU) (90) associated with the customer (130), are accessible by only authorized customers (130). The apparatus is positioned between the SP (110) and the STU (90) and comprises: means for receiving the program bearing packets in a first network protocol from a first data link (40) and removing the packets from the first network protocol; means for adding conditional access to the program bearing packets; and, means for re-encapsulating the program bearing bpackets in a second network protocol and outputting the program bearing packets over a second data link (50). Methods and apparatus for applying conditional access are described that comprise encrypting selected program bearing packets with a first key; encrypting the first key with a second key; and, encrypting the second key according to a public-key encryption algorithm using a public key corresponding to a private key stored within the STU (90) associated with the customer (130).

Abstract translation: 描述了用于确保包括由客户从服务提供商（SP）（110）经由交互式信息服务系统（10）请求的视频，音频和数据中的至少一个的程序的方法和装置，所述交互式信息服务系统（10）发送所请求的 只有经过授权的客户才能访问与客户（130）相关联的机顶单元（STU）（90）的程序承载数据包中的程序。 该设备位于SP（110）和STU（90）之间，并且包括：用于从第一数据链路（40）接收第一网络协议中承载数据包的程序并从第一网络协议中移除数据包的装置; 用于向携带数据包的程序添加条件访问的手段; 以及用于将携带bpackets的程序重新封装在第二网络协议中并通过第二数据链路（50）输出承载数据包的程序的装置。 描述了用于应用条件访问的方法和装置，其包括用第一密钥加密所选择的具有程序的分组; 用第二个密钥加密第一个密钥; 以及使用与存储在与所述客户（130）相关联的所述STU（90）内的私钥对应的公开密钥，根据公开密钥加密算法加密所述第二密钥。

公开(公告)号：WO1996017475A1

公开(公告)日：1996-06-06

申请号：PCT/US1995012219

申请日：1995-09-29

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  McMULLAN, Jay, C., Jr. ,  BURLESON, David, B. ,  BORSETTI, Paul, Jr. ,  FILION, John, T.

IPC: H04N07/16

CPC classification number: A63F13/73 ,  A63F13/12 ,  A63F13/71 ,  A63F13/77 ,  A63F2300/206 ,  A63F2300/401 ,  A63F2300/409 ,  A63F2300/532 ,  A63F2300/552 ,  A63F2300/636 ,  H04N7/165 ,  H04N7/1675 ,  H04N21/8166

Abstract: A communications system for the delivery of digital data programs to a remote location includes a transmitter for transmitting a signal having the digital data programs and a communications terminal (177) located at the remote location. The communications terminal (177) includes a control circuit (200) including authorizing circuitry responsive to authorization data for authorizing the communications terminal to access authorized ones of the digital data programs in one of a first and second authorization mode. For example, automatic authorization modes for game play may comprise an arcade mode and a rental mode, simulating manual access methods i.e. paying for play at a video arcade or for rental of games from a video game store. Moreover, new games may be accessed without charge by the game player if authorized according to a free service authorization map.

Abstract translation: 用于将数字数据节目传送到远程位置的通信系统包括用于发送具有数字数据节目的信号的发射机和位于远程位置的通信终端（177）。 通信终端（177）包括控制电路（200），该控制电路（200）包括响应授权数据的授权电路，用于授权通信终端以第一和第二授权模式之一访问授权的数字数据程序。 例如，用于游戏的自动授权模式可以包括街机模式和租赁模式，模拟手动访问方法，即在视频游戏中进行游戏或从视频游戏商店租赁游戏。 此外，如果根据免费服务授权图授权，游戏玩家可以免费获得新游戏。

公开(公告)号：WO1995028799A1

公开(公告)日：1995-10-26

申请号：PCT/US1995004330

申请日：1995-04-18

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LETT, David, B. ,  RALEY, William, Michael, Jr. ,  HAYASHI, Michael, T.

IPC: H04N01/00

CPC classification number: H04N21/2543 ,  G06K7/0047 ,  G06K7/0086 ,  H04N1/00098 ,  H04N7/163 ,  H04N7/165 ,  H04N7/1675 ,  H04N7/17318 ,  H04N21/47202 ,  H04N21/8166 ,  H04N21/84

Abstract: A subscription television system is provided that transmits a plurality of television signals to a plurality of subscribers. The television signals include pay-per-view programs (purchased by feature) or near-video-on-demand programs (purchased for a period of time for unlimited viewing) that are provided only to subscribers that purchase the programs. Data (16) representing an electronic programming guide is also transmitted. The electronic programming guide can be displayed by a subscriber terminal at the subscriber's location. The electronic programming guide is a grid (Fig. 4A and 4B) listing television programs by date, time and channel. A subscriber can select programs for watching or recording from the electronic program guide. Moreover, the subscriber can purchase pay-per-view or near-video-on-demand programs from the electronic programming guide.

Abstract translation: 提供了向多个用户发送多个电视信号的订阅电视系统。 电视信号包括仅为购买节目的用户提供的按次付费节目（按功能购买）或近视频点播节目（购买一段时间无限制观看）。 也传送代表电子节目指南的数据（16）。 电子节目指南可以由用户位置处的用户终端显示。 电子节目指南是按日期，时间和频道列出电视节目的网格（图4A和4B）。 用户可以从电子节目指南中选择观看或录制节目。 此外，用户可以从电子节目指南中购买按次付费或近视频点播节目。

公开(公告)号：WO1995026597A1

公开(公告)日：1995-10-05

申请号：PCT/US1994007863

申请日：1994-07-11

Applicant: SCIENTIFIC-ATLANTA, INC.

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

IPC: H04J03/26

CPC classification number: H04H60/15 ,  H04H60/19 ,  H04N7/1675 ,  H04N7/20 ,  H04N21/2347 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2365 ,  H04N21/26606 ,  H04N21/4345 ,  H04N21/4347 ,  H04N21/4348 ,  H04N21/4405 ,  H04N21/4623

Abstract: In a packet-based multiplexed communications system, a method of providing different sets of conditional access information to a remote location comprises the steps of: (a) for each different set of conditional access information, inserting the set of conditional access information into a respective sequence of transport packets and assigning a unique packet ID to the transport packet of that sequence; (b) generating a table (90) that specifies, for each of the different sets of conditional access information (94), the packet ID (98) of the transport packets that carry that set of conditional access information; and (c) transmitting the table (90) and the transport packets that carry each of the different sets of conditional access information to the remote location along with other information bearing transport packets. A decoder at the remote location can employ the transmitted table (90) to identify and extract the transport packets that carry a selected one of the sets of conditional access information.

Abstract translation: 在基于分组的复用通信系统中，向远程位置提供不同条件访问信息集合的方法包括以下步骤：（a）对于每个不同的条件访问信息集合，将条件访问信息集合插入相应的 传输分组的顺序并且将唯一分组ID分配给该序列的传输分组; （b）产生一个表格（90），用于为每个条件访问信息（94）中的每一个指定携带该组条件访问信息的传输分组的分组ID（98）; 以及（c）将携带每个不同条件访问信息的表格（90）和携带的数据传输到远程位置以及其他携带信息的传输分组。 在远程位置处的解码器可以使用传输的表（90）来识别和提取携带选定的一组条件访问信息的传输分组。

公开(公告)号：WO1995026596A1

公开(公告)日：1995-10-05

申请号：PCT/US1994007775

申请日：1994-07-11

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, J. ,  LOGSTON, Gary, L.

IPC: H04J03/06

CPC classification number: H04N21/242 ,  H04J3/0632 ,  H04L2012/5616 ,  H04L2012/5649 ,  H04L2012/5652 ,  H04N21/23608 ,  H04N21/4305 ,  H04N21/64307 ,  H04N21/64784 ,  H04Q11/0478

Abstract: A method preserving an original timestamp value in a packet (70) of data to be transmitted from a transmission site to a reception site wherein the original timestamp value may require adjustment at the reception site to account for delays experienced by that packet (70) during multiplexing and/or transmission. The method comprises the steps of (a) defining at least first (88) and second (96) fields within the packet (70); (b) inserting, at the transmission site, an original timestamp value in the first field (88) of the packet (70), and thereafter not modifying the value in the first field (88); and (c) adding the value of any multiplexing or transmission delays experienced by that packet (70) to an initial value in the second field (96). At the reception site, the second field (96) will reflect any delays experienced by the packet (70) while the original timestamp value is preserved in the first field (88).

Abstract translation: 一种在从传输站点发送到接收站点的数据包（70）中保留原始时间戳值的方法，其中原始时间戳值可能需要在接收站点进行调整，以解决该数据包（70）在 复用和/或传输。 该方法包括以下步骤：（a）限定分组（70）内的至少第一（88）和第二（96）场; （b）在发送站点插入分组（70）的第一字段（88）中的原始时间戳值，然后不修改第一字段（88）中的值; 以及（c）将所述分组（70）经历的任何复用或传输延迟的值加到第二字段（96）中的初始值。 在接收站点，第二字段（96）将反映分组（70）所经历的任何延迟，同时在第一字段（88）中保留原始时间戳值。

公开(公告)号：WO1995026595A1

公开(公告)日：1995-10-05

申请号：PCT/US1994007864

申请日：1994-07-11

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  WASILEWSKI, Anthony, J. ,  LOGSTON, Gary, L.

IPC: H04J03/02

CPC classification number: H04N19/61 ,  H04L29/06 ,  H04N7/52 ,  H04N19/00 ,  H04N19/70 ,  H04N21/2365 ,  H04N21/4347

Abstract: A method of packetizing a data stream (80) for transmission comprises the steps of (a) segmenting the data stream (80) and inserting successive segments of the data stream into a plurality of successive program packets (82), each program packet having a header followed by a payload section; (b) for each of the successive program packets, (i) inserting successive segments of the program packet into the payload sections of a consecutive sequence of transport packets (90-98) such that the header of the program packet is aligned with the beginning of the payload section of a first transport packet in the sequence; and (ii) repeating step (b) (i) until the last segment of the program packet is reached. If the last segment of the program packet does not fill the entire payload section of a last transport packet in the sequence, then stuffing bytes are added to the last transport packet to fill out the remainder of the payload section of that transport packet. In this manner, the header of each program packet is always aligned with the beginning of a transport packet payload.

Abstract translation: 打包用于传输的数据流（80）的方法包括以下步骤：（a）分割数据流（80）并将数据流的连续段插入到多个连续的程序分组（82）中，每个程序分组具有 标题后跟有效载荷部分; （b）对于每个连续的程序分组，（i）将程序分组的连续段插入到传输分组（90-98）的连续序列的有效载荷部分中，使得程序分组的报头与开始对齐 的序列中的第一传输分组的有效载荷部分; 和（ii）重复步骤（b）（i），直到达到节目包的最后一段。 如果节目包的最后一段不填充序列中最后一个传输包的整个有效载荷部分，则将填充字节添加到最后一个传输包中以填充该传输包的有效载荷部分的剩余部分。 以这种方式，每个节目分组的报头总是与传输分组有效载荷的开始对齐。

公开(公告)号：WO1995015645A1

公开(公告)日：1995-06-08

申请号：PCT/US1994013666

申请日：1994-12-05

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  LO, Tsai ,  MUNICH, Randy, K. ,  NICHOLAS, Paul, D.

IPC: H04N05/03

CPC classification number: H04N7/56 ,  H04L1/0045 ,  H04L1/0052 ,  H04L1/0057 ,  H04L1/0071 ,  H04N5/4401 ,  H04N21/4383 ,  H04N21/4435

Abstract: A receiver (79) is provided for receiving a digital data stream over a communication path. The digital data is arranged as a sequence of frames, each frame including a plurality of lines of data. The beginning of each frame is indicated by a frame synchronization word (42); the beginning of each line is indicated by a horizontal synchronization byte (46). The data is interleaved by an encoder (162) prior to transmission. The decoder (79-82, 84, 86, 88) contains circuitry (92) for locating the horizontal and frame synchronization data and contains circuitry (96) for deinterleaving the digital data. Both the synchronization locating circuitry and deinterleaving circuitry require access to a memory (86), but not at the same time. Therefore, a single memory is used with the synchronization recovery circuitry and deinterleaving circuitry alternatively addressing the memory.

Abstract translation: 提供了一种用于通过通信路径接收数字数据流的接收机（79）。 数字数据被布置为一系列帧，每帧包括多行数据。 每帧的开始由帧同步字（42）表示; 每行的开始由水平同步字节（46）表示。 数据在传输之前由编码器（162）交织。 解码器（79-82,84,86,88）包含用于定位水平和帧同步数据的电路（92），并且包含用于对数字数据进行解交织的电路（96）。 同步定位电路和解交织电路都需要访问存储器（86），但不需要同时访问存储器（86）。 因此，使用单个存储器与同步恢复电路和解交织电路交替地寻址存储器。

公开(公告)号：WO1995015634A1

公开(公告)日：1995-06-08

申请号：PCT/US1994013844

申请日：1994-12-02

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  SHELDRICK, Wayne, S. ,  GAMMIE, Keith, B. ,  WOO, Arthur, S. ,  CHAN, Gary, W., C.

IPC: H04L09/32

CPC classification number: H04H20/28 ,  H04B7/2041 ,  H04N7/163 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/4405 ,  H04N21/4524 ,  H04N21/4627 ,  H04N21/8355

Abstract: Authorization information, such as blackout and spotlight regions, circular blackout and spotlight regions, and tier pointers are transmitted from an encoder to a decoder in a plurality of sessions of data frames. Service data are fed to a multiplexer unit (110) for uplink to a satellite (160), which feeds the data to decoders in various areas. The entire process at the headend is overseen by a control computer (120).

Abstract translation: 诸如停电和聚光灯区域之类的授权信息，圆形遮光和聚光灯区域以及层指针在多个数据帧会话中从编码器传送到解码器。 服务数据被馈送到多路复用器单元（110），用于上行链路到卫星（160），其将数据馈送到各个区域中的解码器。 前端的整个过程由控制计算机（120）监视。

公开(公告)号：WO1994029811A1

公开(公告)日：1994-12-22

申请号：PCT/US1994006361

申请日：1994-06-06

Applicant: SCIENTIFIC-ATLANTA, INC.

Inventor： SCIENTIFIC-ATLANTA, INC. ,  HAMILTON, Scott ,  HAMAN, Ray, Thomas ,  DURDEN, Gregory, Steven ,  CHRISTENSEN, Jan, L. ,  PAULICK, Melvin

IPC: G06F15/62

CPC classification number: H04N7/10 ,  H04N1/00098 ,  H04N7/03 ,  H04N7/0888

Abstract: A data controller (16) which manages the flow of text and electronic program guide (EPG) information to a cable television viewer. The data controller (16) receives text and EPG information from one or a plurality of authorized data sources (20) via a communications link, processes the received data in its internal database manager to perform data compression and the like, and then transmits this text information to the viewer under control of the head end controller (34). In a preferred embodiment, the text data is formatted on a screen basis into transactions of a predetermined length and the EPG data is formatted on a program basis into transactions of the same length. The transactions are then inserted into the vertical blanking interval of a channel to which the corresponding text or electronic program data has been assigned.

Abstract translation: 一种用于管理文本和电子节目指南（EPG）信息流向有线电视观众的数据控制器（16）。 数据控制器（16）经由通信链路从一个或多个授权数据源（20）接收文本和EPG信息，处理其内部数据库管理器中的接收数据以执行数据压缩等，然后将该文本 在头端控制器（34）的控制下向观察者提供信息。 在优选实施例中，将文本数据在屏幕上格式化为预定长度的事务，并且EPG数据以程序形式被格式化为具有相同长度的事务。 然后将交易插入到已经分配相应文本或电子节目数据的频道的垂直消隐间隔中。