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1. 发明申请

WO1997035410A1 DYNAMIC BANDWIDTH ALLOCATION FOR A COMMUNICATION NETWORK 审中-公开
标题翻译：通信网络的动态带宽分配
公开(公告)号：WO1997035410A1
公开(公告)日：1997-09-25
申请号：PCT/US1997004163
申请日：1997-03-17
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , HOU, Victor, T. , FELLOWS, Jonathon, A.
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
IPC分类号： H04L12/56
CPC分类号： H04L47/822 , H04L12/2801 , H04L12/5602 , H04L47/70 , H04L47/762 , H04L2012/561 , H04L2012/5632 , H04Q11/0067 , H04Q11/0478 , H04Q2011/0064
摘要： Bandwidth is adaptively allocated in an upstream channel of a layered data communication network such as that used for carrying messages from a number of subscriber units (250, 252, ..., 254) to a central controller (210), for example, to allow the subscriber units to send data for Internet access, videoconferencing, or voice communication. A running total of unallocated bandwidth (BWA(j)) is maintained in successive control intervals. A traffic count (C(i)) is determined for each subscriber unit by measuring the bandwidth which is used, for example, by counting the number of slots used in a control interval. The assigned bandwidth (B(i)) of the subscriber units is then adjusted when a ratio (K) of the traffic count to the assigned bandwidth is at or below a lower threshold (T1), and the running total of unallocated bandwidth is incremented by the decrease in the assigned bandwidth. The assigned bandwidth may be increased when a ratio (K) of the traffic count to the assigned bandwidth is at or above an upper threshold (T2) by distributing the unallocated bandwidth among the subscriber units. A subscriber unit hierarchy may be used to grant priority to selected users.
摘要翻译：带宽被自适应地分配在分层数据通信网络的上行信道中，例如用于将来自多个用户单元（250,252，...，254）的消息传送到中央控制器（210）的上行信道，例如，允许用户单元发送用于因特网接入，视频会议或语音通信的数据。在连续的控制间隔中保持运行总共的未分配带宽（BWA（j））。通过测量例如通过对在控制间隔中使用的时隙数进行计数而使用的带宽来确定每个用户单元的业务量（C（i））。然后，当业务量与分配带宽的比（K）等于或低于下限阈值（T1）时，用户单元的分配带宽（B（i））被调整，并且未分配带宽的运行总和增加通过分配带宽的减少。当通过在订户单元之间分配未分配的带宽，当业务量与分配的带宽的比率（K）处于或高于上限阈值（T2）时，可以增加分配的带宽。订户单元层级可以用于向所选择的用户授予优先权。

2. 发明申请

WO1997005720A2 CRYPTOGRAPHIC SYSTEM WITH CONCEALED WORK FACTOR 审中-公开
标题翻译：具有隐蔽工作因素的CRYPTOGRAPHIC系统
公开(公告)号：WO1997005720A2
公开(公告)日：1997-02-13
申请号：PCT/US1996012296
申请日：1996-07-26
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , SPRUNK, Eric
IPC分类号： H04L00/00
CPC分类号： H04N21/2347 , H04L9/0625 , H04L9/0662 , H04L9/088 , H04L9/0894 , H04N7/1675
摘要： A method and apparatus for generating cryptographic keys in a cryptographic system. First, a key is generated by reducing the distribution space of the cryptographic key (320). Next, a key is generated by increasing the distribution space of the reduced space key (330). This reduced-increased-space key is used to encrypt information (340). Persons that know the specific distribution reducing and expanding procedures would required much reduced work factor to decrypt information encrypted by these keys. Cryptographic keys generated by this method and apparatus would meet U.S. Export limitations on keys as applied to cryptographic applications and technologies.
摘要翻译：一种用于在密码系统中生成加密密钥的方法和装置。首先，通过减小加密密钥的分配空间来生成密钥（320）。接下来，通过增加缩小空间密钥（330）的分配空间来生成密钥。这种减少增加空间的密钥用于加密信息（340）。知道具体分布减少和扩展程序的人员将需要大大减少工作因素来解密由这些密钥加密的信息。由该方法和装置生成的加密密钥将符合美国出口限制，适用于密码应用和技术。

3. 发明申请

WO1997001930A1 BANDWIDTH EFFICIENT COMMUNICATION OF USER DATA IN DIGITAL TELEVISION DATA STREAM 审中-公开
标题翻译：数字电视数据流中用户数据的带宽高效通信
公开(公告)号：WO1997001930A1
公开(公告)日：1997-01-16
申请号：PCT/US1996010840
申请日：1996-06-27
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , NUBER, Ray , MORONEY, Paul , HOOGENBOOM, Chris
IPC分类号： H04N07/087
CPC分类号： H04N19/00 , H04N5/4401 , H04N7/088 , H04N7/0885 , H04N19/61 , H04N19/70 , H04N21/435 , H04N21/4621 , H04N21/4884
摘要： A method and apparatus are provided for communicating VBI user information for digital television. A syntax is provided which allows the transport of closed captions (41), non-realtime video (43), sampled video (45) and AMOL (47). Non-realtime video can be used to transport various types of data, such as a vertical interval test signal (VITS) through the system at full resolution. The provision in the syntax of a count for each type of VBI user information enables the adjustment of a digital television data stream to accommodate variable amounts and types of such information without space being reserved in advance. The provision of a priority number in the syntax enables decoders to discard VBI user information priorities which are not supported by the particular decoder.
摘要翻译：提供了一种用于传送数字电视的VBI用户信息的方法和装置。提供了允许传送隐藏字幕（41），非实时视频（43），采样视频（45）和AMOL（47）的语法。非实时视频可用于通过系统以全分辨率传输各种类型的数据，如垂直间隔测试信号（VITS）。用于每种类型的VBI用户信息的计数语法的提供使得能够调整数字电视数据流以适应可变数量和类型的这种信息，而没有预先保留的空间。在语法中提供优先权号码使解码器能够丢弃特定解码器不支持的VBI用户信息优先级。

4. 发明申请

WO1997016046A1 VARIABLE LENGTH BURST TRANSMISSION OVER THE PHYSICAL LAYER OF A MULTILAYER TRANSMISSION FORMAT 审中-公开
标题翻译：多层传输格式的物理层可变长度爆发传输
公开(公告)号：WO1997016046A1
公开(公告)日：1997-05-01
申请号：PCT/US1996016923
申请日：1996-10-23
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , KOLZE, Thomas, J. , ANDERSON, Steven, E. , HOU, Victor, T.
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
IPC分类号： H04Q11/04
CPC分类号： H04L1/0065 , H04L1/0002 , H04L1/0003 , H04L1/0006 , H04L1/0007 , H04L1/0009 , H04L1/0018 , H04L1/0071 , H04L1/1809 , H04L12/2801 , H04L2012/5607 , H04L2012/5645 , H04L2012/5647 , H04L2012/5652 , H04Q11/0478
摘要： Apparatus is provided for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme. Each burst contains information data (40, 50, 60, 64, 74, 78, 82) and overhead (30, 32, 34, 36, 38, 42, 44, 62, 66, 76, 80, 84). The overhead includes forward error control (FEC) data (42, 62, 66, 76, 80, 84). Different burst modes (Figs. 2, 3, 4, 5) are provided to enable a trade-off to be made between bandwidth efficiency and data transmission robustness. The burst modes provide different combinations of modulation (such as QPSK and 16-QAM), symbol rates, FEC coding levels and frame and preamble structure. The apparatus is particularly suitable for use in upstream communications over hybrid fiber coax cable television plants.
摘要翻译：提供了用于在多层数据通信方案中在物理层上以可变长度突发传送数据分组的装置。每个突发包含信息数据（40,50,60,64,74,78,82）和头顶（30,32,34,36,38,42,44,62,66,76,80,84）。开销包括前向错误控制（FEC）数据（42,62,66,76,80,84）。提供了不同的突发模式（图2,3,4,5），以便能够在带宽效率和数据传输鲁棒性之间进行权衡。突发模式提供了不同的调制组合（如QPSK和16-QAM），符号率，FEC编码电平以及帧和前导码结构。该装置特别适用于混合光纤同轴电缆电视设备的上行通信。

5. 发明申请

WO1996003838A1 SUBSCRIPTION TELEVISION PICTURE SCRAMBLING AND DESCRAMBLING SYSTEM PROVIDING COMPATIBILITY WITH DIFFERENT SUCH SYSTEMS 审中-公开
标题翻译：订阅电视画面和不同系统提供兼容性的DESCRAMBLING系统
公开(公告)号：WO1996003838A1
公开(公告)日：1996-02-08
申请号：PCT/US1995010004
申请日：1995-07-25
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , MARTIN, Thomas, Forde
IPC分类号： H04N07/167
CPC分类号： H04N7/1716 , H04N7/1675 , H04N7/1713
摘要： Video signal scrambling and descrambling methods and apparatus for a subscription TV system (10) are provided which are compatible with other equipment (46) operating in accordance with pre-existing modes of signal scrambling and descrambling. Coded indicator signals (92, 96) generated in accordance with the invention are inserted into selected lines of video signals (90) before they are scrambled by a previously installed scrambler (18) located at a central office. The scrambled video signals, with indicator signals inserted, are then sent (55) to all subscriber locations within the TV system. At new subscriber locations (22), descrambling receivers, in accordance with the present invention, detect and decode the indicator signals and in accordance with a new mode of operation properly descramble the video signals. At old subscriber locations (46), previously installed descrambling receivers ignore the indicator signals and descramble the video signals in accordance with pre-existing modes of operation.
摘要翻译：提供了用于订阅电视系统（10）的视频信号加扰和解扰方法和装置，其与根据预先存在的信号加扰和解扰模式操作的其他设备（46）兼容。根据本发明生成的编码指示符信号（92,96）在被先前安装的位于中心局的加扰器（18）加扰之前被插入到视频信号（90）的选定行中。然后，将插入有指示符信号的扰频视频信号（55）发送到TV系统内的所有用户位置。在新用户位置（22），根据本发明的解扰接收机检测和解码指示符信号，并根据新的操作模式对视频信号进行解扰。在旧用户位置（46），先前安装的解扰接收机忽略指示符信号，并根据预先存在的操作模式对视频信号进行解扰。

6. 发明申请

WO1995023385A1 CABLE TELEVISION CONVERTER BOX WITH A SMART CARD CONNECTOR UNDERNEATH 审中-公开
标题翻译：带智能卡连接器的电缆电视转换盒
公开(公告)号：WO1995023385A1
公开(公告)日：1995-08-31
申请号：PCT/US1995002340
申请日：1995-02-27
申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE
发明人： GENERAL INSTRUMENT CORPORATION OF DELAWARE , HERRMANN, Charles , MIGGELS, Stephen, Gerard
IPC分类号： G06K07/06
CPC分类号： G07F7/1008 , G06Q20/341 , G06Q20/40975 , H04N7/163 , H04N7/17345
摘要： A Cable Television (CATV) Converter box (10) or computer has a Smart Card connector (16) mounted in a bottom wall (22) thereof. The Converter box includes a case (12) having a top wall, the bottom wall, and four side walls (14), a main printed circuit (PC) board (50) mounted within the Converter box and parallel to the top and bottom walls thereof, and the Smart Card connector. The Smart Card connector is mounted directly onto the PC board and within a protrusion (17) of the bottom wall of the Converter box. The Smart Card connector defines an opening (19) which is aligned with a first end of a groove (18) defined in the bottom wall of the case for receiving a Smart Card storing a predetermined signal security decrypting algorithm. A second end of the groove is either formed in one of the side walls of the device or in the bottom wall of the case. The Smart Card is installed by inserting the Smart Card in the groove and placing it into contact with the Smart Card connector.
摘要翻译：有线电视（CATV）转换器盒（10）或计算机具有安装在其底壁（22）中的智能卡连接器（16）。转换器盒包括具有顶壁，底壁和四个侧壁（14）的壳体（12），安装在转换器箱内并平行于顶壁和底壁的主印刷电路板（PC）板（50）和智能卡连接器。智能卡连接器直接安装在PC板上和转换盒底壁的突起（17）内。智能卡连接器限定开口（19），其与限定在壳体的底壁中的凹槽（18）的第一端对准，用于接收存储预定信号安全解密算法的智能卡。槽的第二端或者形成在装置的一个侧壁中或者形成在壳体的底壁中。通过将智能卡插入凹槽中并将其与智能卡连接器接触来安装智能卡。

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