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1. 发明申请

WO2004114645A2 NARROWBAND INTERFERENCE AND IDENTIFICATION AND DIGITAL PROCESSING FOR CABLE TELEVISION RETURN PATH PERFORMANCE ENHANCEMENT 审中-公开
标题翻译：窄带干扰和识别和数字处理电缆电视返回路径性能提升
公开(公告)号：WO2004114645A2
公开(公告)日：2004-12-29
申请号：PCT/US2004/018309
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION , BOOTH, Ted, Nelson , HOWALD, Robert, L.
发明人： BOOTH, Ted, Nelson , HOWALD, Robert, L.
IPC分类号： H04N
CPC分类号： H04N7/102 , H04N7/17309 , H04N21/6118 , H04N21/6168
摘要： An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.
摘要翻译：自适应数据流过滤器在网络中组合这些路径之前，从CATV返回路径中去除窄带干扰。用于从CATV返回路径去除窄带干扰的方法实时检测潜在的窄带干扰，并适配滤波器以去除该潜在的窄带干扰。上述方法的示例性实施例使用先前创建的滤波器，其基于检测到的干扰以自适应方式组合以连续适应新的干扰源。上述方法的另一示例性实施例基于检测到的干扰来计算数据流滤波器的新的滤波器系数。在另一个实施例中，对于被标识为上述阈值的每个干扰频带，以乒乓方式操作两个滤波器。这使得能够更新一个过滤器，而另一个过滤器正在执行数据流过滤器操作。

2. 发明申请

WO2004114058A3 DIGITAL SIGNAL PROCESSING SCHEME FOR HIGH PERFORMANCE HFC DIGITAL RETURN PATH SYSTEM WITH BANDWIDTH CONSERVATION 审中-公开
公开(公告)号：WO2004114058A3
公开(公告)日：2004-12-29
申请号：PCT/US2004/018337
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION, A CORPORATION OF THE STATE OF DELAWARE , ZHANG, Mao, Zhu , HOWALD, Robert, L.
发明人： ZHANG, Mao, Zhu , HOWALD, Robert, L.
IPC分类号： H03M7/38
摘要： In a cable return path system (70) a method for performing digital companding (72) add a predetermined offset (73) to digital value to be companded and employs a modified m-law or a-law companding technique to obtain reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this reduction when compared to current transmission methods without this technique.

3. 发明申请

WO2004098170A2 PROCESSING MULTIPLE ENCRYPTED TRANSPORT STREAMS 审中-公开
标题翻译：处理多个加密运输流程
公开(公告)号：WO2004098170A2
公开(公告)日：2004-11-11
申请号：PCT/US2004/012149
申请日：2004-04-20
申请人： GENERAL INSTRUMENT CORPORATION , HOBROCK, Lance , BOYKOV, Boyko , HERRING, Matthew , TIWARI, Ashish , DAILY, Mack
发明人： HOBROCK, Lance , BOYKOV, Boyko , HERRING, Matthew , TIWARI, Ashish , DAILY, Mack
IPC分类号： H04N
CPC分类号： H04L63/0428 , H04N7/1675 , H04N21/2347 , H04N21/23473 , H04N21/23608 , H04N21/23611 , H04N21/23895 , H04N21/26609 , H04N21/4181 , H04N21/43853 , H04N21/4405 , H04N21/4623 , H04N21/63345
摘要： A single decryption engine (140) is used for decrypting a plurality of encrypted transport streams (112A, 112B). Packets in each of the plurality of encrypted transport streams are tagged (116A, 116B) with a tag value to indicate their origin stream. The tagged packets from the plurality of encrypted transport streams are merged (120) into a merged transport stream (120A). The packets in the merged transport stream (120A) are decrypted with the decryption engine (140) to produce a decrypted merged transport stream (130A). The decrypted merged transport stream is split into a plurality of decrypted transport streams (122), equal in number to the plurality of encrypted transport streams, by routing packets in the decrypted merged transport stream to specific decrypted transport streams according to their tag value. A null-packet padding technique, a gapped-clock technique and a multi-port static RAM controller technique are disclosed.
摘要翻译：单个解密引擎（140）用于解密多个加密的传输流（112A，112B）。多个加密传输流中的每一个中的分组被标记（116A，116B），具有标签值以指示其原始流。来自多个加密传输流的标记分组被合并（120）到合并的传输流（120A）中。合并的传输流（120A）中的分组用解密引擎（140）解密，以产生解密的合并传输流（130A）。解密的合并传输流通过根据其标签值将经解密的合并传输流中的分组路由到特定解密传输流，将其分解为数个等于多个加密传输流的多个解密传输流（122）。公开了空分组填充技术，间隔时间技术和多端口静态RAM控制器技术。

4. 发明申请

WO2004075530A2 METHODS AND APPARATUS FOR INTEGRATING ONE-WAY AND TWO-WAY SECURITY SYSTEMS TO ENABLE SECURE DISTRIBUTION OF ENCRYPTED SERVICES 审中-公开
标题翻译：用于集成单向和双向安全系统以启用加密服务的安全分发的方法和设备
公开(公告)号：WO2004075530A2
公开(公告)日：2004-09-02
申请号：PCT/US2004/004308
申请日：2004-02-12
申请人： GENERAL INSTRUMENT CORPORATION , BOOTH, Robert, C.
发明人： BOOTH, Robert, C.
IPC分类号： H04N
CPC分类号： H04L63/0464 , H04L63/166 , H04L2463/101
摘要： The present invention provides methods and apparatus for integrating one-way and two-way security systems to enable secure distribution of services. A decryption device (110) securely receives and decrypts encrypted services from one or more service providers (150). A consumer device (100) securely communicates with the decryption device (110). A user interface (130) associated with the consumer device (100) initiates a service request (140) for a requested service from a service provider (150). In operation, the service request (140) is communicated from the consumer device (100) to the decryption device (110). The requested service (140) is then acquired by the decryption device (110) as an encrypted requested service (120). The acquired requested service (120) is then decrypted by the decryption device (110). The requested service (120) is re-encrypted and securely communicated from the decryption device (110) to the consumer device (100). The re-encrypted requested service (105) is then decrypted and decoded at the consumer device (100) to provide the requested service.
摘要翻译：本发明提供了用于集成单向和双向安全系统以实现服务的安全分发的方法和设备。解密设备（110）安全地接收并解密来自一个或多个服务提供商（150）的加密服务。消费者设备（100）与解密设备（110）安全地通信。与消费者设备（100）相关联的用户界面（130）为来自服务提供者（150）的所请求服务发起服务请求（140）。在操作中，服务请求（140）从消费者设备（100）传送到解密设备（110）。然后，解密设备（110）获取所请求的服务（140）作为加密的请求服务（120）。然后，解密设备（110）解密所获取的请求的服务（120）。所请求的服务（120）被重新加密并且从解密设备（110）安全地传送到消费者设备（100）。然后在消费者设备（100）解密和解码重新加密的请求服务（105）以提供所请求的服务。

5. 发明申请

WO2004062279A1 METHOD AND APPARATUS FOR PROVIDING ANYTIME TELEVISION INTERACTIVITY 审中-公开
标题翻译：提供电视电视交互性的方法和装置
公开(公告)号：WO2004062279A1
公开(公告)日：2004-07-22
申请号：PCT/US2003/041792
申请日：2003-12-30
申请人： GENERAL INSTRUMENT CORPORATION
发明人： HALGAS, Joseph, F., Jr. , STONE, Christopher, J. , KAMIENIECKI, John
IPC分类号： H04N5/76
CPC分类号： H04N21/42676 , H04N5/4401 , H04N5/44582 , H04N5/76 , H04N5/765 , H04N5/775 , H04N5/85 , H04N5/9201 , H04N21/4126 , H04N21/4135 , H04N21/4147 , H04N21/433 , H04N21/43637 , H04N21/4622 , H04N21/47214 , H04N21/4884 , H04N21/6118 , H04N21/6543 , H04N21/8545 , H04N21/858 , H04N21/8586
摘要： A method and apparatus for recording a television program with interactive content includes recording data supporting interactive features of the television program in addition to recording the television program. In particular, the present invention provides for a television display (115) that is communicatively connected to an interactive set-top box (101), wherein a wireless webpad, or other remote control unit (201), is placed in communication with the interactive set-top box (101) to provide enhanced user control and interaction with the system. The interactive set-top box (101) is also connected to a source of a television signal, such a cable television system cable television connection (100).
摘要翻译：用于记录具有互动内容的电视节目的方法和装置包括除了记录电视节目之外，支持电视节目的互动特征的记录数据。特别地，本发明提供一种电视显示器（115），其通信地连接到交互式机顶盒（101），其中无线网页板或其他遥控单元（201）被放置为与交互式机顶盒机顶盒（101），以提供增强的用户控制和与系统的交互。交互式机顶盒（101）也连接到诸如有线电视系统有线电视连接（100）的电视信号源。

6. 发明申请

WO2002075891A1 ELECTROSTATIC DISCHARGE PROTECTION STRUCTURES FOR HIGH SPEED TECHNOLOGIES WITH MIXED AND ULTRA-LOW VOLTAGE SUPPLIES 审中-公开
标题翻译：具有混合和超低电压供应的高速技术的静电放电保护结构
公开(公告)号：WO2002075891A1
公开(公告)日：2002-09-26
申请号：PCT/US2002/007895
申请日：2002-03-15
申请人： SARNOFF CORPORATION , SARNOFF EUROPE
发明人： MERGENS, Marcus , VERHAEGE, Koen , ARMER, John , RUSS, Christian
IPC分类号： H02H3/22
CPC分类号： H01L27/0262 , H01L27/0251 , H01L29/866 , H03K17/0812 , H03K17/0814 , H03K17/305
摘要： An electrostatic discharge (ESD) protection circuit (302) in a semiconductor integrated circuit (IC) (100) having protected circuitry. In one embodiment, the ESD protection circuit (302) includes a pad (104), adapted for connection to a protected circuit node of the IC, and an ESD protection device (306), which is coupled between the pad and ground (112). A diode turn-on device (308) is coupled in a forward conduction direction from the pad to a first gate (336) of the ESD protection device. In a second embodiment, the ESD protection circuit (2002) is an SCR having an anode (322) coupled to a first voltage supply line, and a cathode coupled to ground. A parasitic capacitance (2004) is coupled between each the voltage supply line and the grounded cathode.
摘要翻译：具有受保护电路的半导体集成电路（IC）（100）中的静电放电（ESD）保护电路（302）。在一个实施例中，ESD保护电路（302）包括适于连接到IC的受保护电路节点的焊盘（104）和耦合在焊盘和接地（112）之间的ESD保护装置（306）。二极管接通装置（308）从正面传导方向耦合到ESD保护装置的第一栅极（336）。在第二实施例中，ESD保护电路（2002）是具有耦合到第一电压供应线的阳极（322）和耦合到地的阴极的SCR。寄生电容（2004）耦合在每个电源线和接地阴极之间。

7. 发明申请

WO2004114645A3 NARROWBAND INTERFERENCE AND IDENTIFICATION AND DIGITAL PROCESSING FOR CABLE TELEVISION RETURN PATH PERFORMANCE ENHANCEMENT 审中-公开
公开(公告)号：WO2004114645A3
公开(公告)日：2004-12-29
申请号：PCT/US2004/018309
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION , BOOTH, Ted, Nelson , HOWALD, Robert, L.
发明人： BOOTH, Ted, Nelson , HOWALD, Robert, L.
IPC分类号： H04N7/173
摘要： An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.

8. 发明申请

WO2004095653A3 OPTICAL FREQUENCY SYNTHESIZER 审中-公开
公开(公告)号：WO2004095653A3
公开(公告)日：2004-11-04
申请号：PCT/US2004/012150
申请日：2004-04-20
申请人： GENERAL INSTRUMENT CORPORATION , LITVIN, Kerry, I.
发明人： LITVIN, Kerry, I.
IPC分类号： H01S3/10
摘要： An optical frequency synthesizer controls a tunable laser to output signals having specific wavelengths. The synthesizer includes a wavelength discriminating device, a wavelength tuning device and a phase locked loop (PLL) circuit. The wavelength discriminating device receives a sample of the signals outputted by the tunable laser, processes the sample signals and passes the processed sample signals to the PLL circuit. Based on the processed sample signals, the PLL circuit controls the wavelength tuning device to tune the laser to output the signals having specific wavelengths.

9. 发明申请

WO2004072792A3 METHODS, SYSTEMS AND APPARATUS FOR DETERMINING TRANSPORT STREAM CHANNELS FOR VIDEO-ON-DEMAND APPLICATIONS 审中-公开
公开(公告)号：WO2004072792A3
公开(公告)日：2004-08-26
申请号：PCT/US2004/003540
申请日：2004-02-06
申请人： GENERAL INSTRUMENT CORPORATION , MACK, Robert, E. , JOST, Arthur, P. , RABINOWITZ, Larry , BRUMBAUGH, David , GREGOTSKI, Mark
发明人： MACK, Robert, E. , JOST, Arthur, P. , RABINOWITZ, Larry , BRUMBAUGH, David , GREGOTSKI, Mark
IPC分类号： H04N7/173
摘要： The present invention enables determination of transport stream channels for video-on-demand (VOD) applications. A television terminal (50, 52, 54) is provided which includes a tuner for tuning to a home channel. An application program interface in the terminal (50, 52, 54) retrieves a transport stream identifier of a transport stream carrying the home channel. The home channel transport stream identifier defines a plurality of transport stream identifiers of a corresponding plurality of transport streams visible to the terminal (50, 52, 54). A video service controller (21) receives the home channel transport stream identifier from the application program interface. A VOD subsystem controller (26) controls distribution of a requested VOD service in response to video service controller (21) commands. A video pump (30, 32, 34) provides the requested VOD service to a re-multiplexing QAM device (31, 33, 35) for distribution on one of the transport streams visible to the terminal (50, 52, 54) based on commands from the VOD subsystem controller (26).

10. 发明申请

WO2004072690A2 OPTICAL SWITCH HAVING AN AUTORESTORATION FEATURE FOR SWITCHING FROM A BACKUP OPTICAL PATH TO A PRIMARY OPTICAL PATH 审中-公开
标题翻译：具有用于从备用光路切换到主光路的自动特征的光学开关
公开(公告)号：WO2004072690A2
公开(公告)日：2004-08-26
申请号：PCT/US2004/003538
申请日：2004-02-06
申请人： GENERAL INSTRUMENT CORPORATION , JASTI, Chandra, Sekhar
发明人： JASTI, Chandra, Sekhar
IPC分类号： G02B
CPC分类号： H04B10/032 , G02B6/2852 , G02B6/4214
摘要： Optical switches (210, 220) are provided in an optical transmission system having at least two optical nodes in optical communication over a primary optical path (212) and a backup optical path (214). An optical switch (210, 220) is located in each of the optical nodes. Each of the optical switches (210, 220) includes a switching element (216, 224) having an input port and a plurality of output ports coupled to the primary (212) and backup (214) optical paths, respectively. The switching element has a first state optically coupling an optical signal from the input port to the primary path (212) and a second state optically coupling an optical signal from the input port to the backup path (214). First and second optical taps (230, 218) are located in the primary optical path. Third and fourth optical taps (232, 217) are located in the backup optical path. A first photodetector (222) is optically coupled to the second optical tap (218) for receiving a portion of the optical signal traveling in the primary optical path (212). A second photodetector (221) is optically coupled to the third optical tap (217) for receiving a portion of the optical signal traveling in the secondary optical path (214). A first optical path (234) optically couples the first optical tap (230) to the fourth optical tap (232) such that a portion of an optical signal traveling in the secondary path (214) is coupled onto the primary path. Finally, a controller (223) is electrically coupled to each of the optical switches. The controller (223) is configured so that when each of the switching elements are in the second state and the first photodetector (222, 228) in each of the optical switches detects an optical signal, the controller (223) returns the switching elements to the first state.
摘要翻译：在具有通过主光路（212）和备用光路（214）的光通信中的至少两个光节点的光传输系统中提供光开关（210,220）。光开关（210,220）位于每个光节点中。光开关（210,220）中的每一个包括具有输入端口和耦合到初级（212）和备用（214）光路的多个输出端口的开关元件（216,224）。开关元件具有将来自输入端口到主路径（212）的光学信号光耦合的第一状态和将光学信号从输入端口光学耦合到备用路径（214）的第二状态。第一和第二光学抽头（230,218）位于主光路中。第三和第四光学抽头（232,217）位于备用光路中。第一光电检测器（222）光耦合到第二光学抽头（218），用于接收在主光路（212）中行进的光信号的一部分。第二光电检测器（221）光耦合到第三光学抽头（217），用于接收在次光路（214）中行进的光信号的一部分。第一光路（234）将第一光学抽头（230）光耦合到第四光学抽头（232），使得在辅助路径（214）中行进的光信号的一部分耦合到主路径上。最后，控制器（223）电耦合到每个光开关。控制器（223）被构造成使得当每个开关元件处于第二状态并且每个光开关中的第一光电检测器（222,228）检测到光信号时，控制器（223）将开关元件返回到第一个状态。

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