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51. 发明授权

US07274653B1 Hierarchical QAM transmission system with varying grouping factor 有权
标题翻译：具有不同分组因子的分层QAM传输系统
公开(公告)号：US07274653B1
公开(公告)日：2007-09-25
申请号：US10130589
申请日：2000-11-22
申请人： Timothy Forrest Settle , Thomas Peter Krauss , Kumar Ramaswamy
发明人： Timothy Forrest Settle , Thomas Peter Krauss , Kumar Ramaswamy
IPC分类号： H04J11/00
CPC分类号： H04L25/062 , H04L27/3488 , H04L27/38
摘要： A hierarchical QAM system allows the transmission of different sources by embedding the relative constellation points. A QAM transmitting system, includes a source of a level 1 and a level 2 data stream, each data stream carrying successive symbols. A hierarchical QAM transmitter, coupled to the level 1 and level 2 data stream source, generates a hierarchical QAM signal in which a level 1 symbol is represented by a data point in one of four quadrants in the I-Q plane, and a level 2 symbol is represented by the data point in one of four sub-quadrants surrounding a center point of the quadrant containing the level 1 data point. The level 2 data point is spaced away from the center point by a grouping factor set to more closely match the bit error rate performance of the level 1 and level 2 data streams.
摘要翻译：分层QAM系统允许通过嵌入相对星座点来传输不同的源。 QAM发送系统包括1级和2级数据流的源，每个数据流承载连续符号。耦合到1级和2级数据流源的分级QAM发射机产生分级QAM信号，其中1级符号由IQ平面中的四个象限之一的数据点表示，2级符号为由围绕包含1级数据点的象限的中心点的四个子象限之一的数据点表示。 2级数据点与中心点间隔一个分组因子，以更加紧密地匹配1级和2级数据流的误码率性能。

52. 发明申请

US20070011716A1 Unified receiver for layered and hierarchical modulation systems 失效
标题翻译：用于分层和分层调制系统的统一接收机
公开(公告)号：US20070011716A1
公开(公告)日：2007-01-11
申请号：US10556544
申请日：2004-04-24
申请人： Joshua Koslov , Kumar Ramaswamy
发明人： Joshua Koslov , Kumar Ramaswamy
IPC分类号： H04N7/16 , H04N7/20 , H03K9/06 , H03C5/00 , H03K7/06 , H04L27/02
CPC分类号： H04L27/183 , H04L27/0008 , H04L27/3488 , H04L27/38 , H04L2025/03401 , H04L2025/0342
摘要： A satellite receiver includes a down converter for providing a received signal and a demodulator having at least two demodulation modes for demodulating the received signal, wherein one demodulation mode is hierarchical demodulation and another demodulation mode is layered demodulation.
摘要翻译：卫星接收机包括用于提供接收信号的下变频器和具有解调接收信号的至少两个解调模式的解调器，其中一个解调模式是分层解调，另一个解调模式是分层解调。

53. 发明授权

US07073116B1 Error detection/correction coding for hierarchical QAM transmission systems 有权
标题翻译：分层QAM传输系统的错误检测/校正编码
公开(公告)号：US07073116B1
公开(公告)日：2006-07-04
申请号：US10148155
申请日：2000-11-22
申请人： Timothy Forrest Settle , Thomas Peter Krauss , Kumar Ramaswamy
发明人： Timothy Forrest Settle , Thomas Peter Krauss , Kumar Ramaswamy
IPC分类号： H03M13/03
CPC分类号： H03M13/25 , H04L27/3488
摘要： The power of the respective codes used by the first and second error detection/correction circuitry are such that the coded bit error rate of the first data stream is more closely matched to the coded bit error rate of the second data stream. A hierarchical QAM system allows the transmission of different sources by embedding the relative constellation points. The hierarchical QAM transmitter encodes the first data stream using a code having a first detection/correction power and encodes the second data stream using a code having a second detection/correction power.
摘要翻译：由第一和第二错误检测/校正电路使用的各个代码的功率使得第一数据流的编码误码率与第二数据流的编码误码率更紧密地匹配。分层QAM系统允许通过嵌入相对星座点来传输不同的源。分层QAM发射机使用具有第一检测/校正功率的码对第一数据流进行编码，并且使用具有第二检测/校正功率的码对第二数据流进行编码。

54. 发明申请

US20060117360A1 Robust mode staggercasting fast channel change 有权
标题翻译：稳健模式交错快速通道更改
公开(公告)号：US20060117360A1
公开(公告)日：2006-06-01
申请号：US10543481
申请日：2004-01-23
申请人： Jeffrey Cooper , Jill Boyce , Kumar Ramaswamy
发明人： Jeffrey Cooper , Jill Boyce , Kumar Ramaswamy
IPC分类号： H04N7/173 , H04N7/16
CPC分类号： H04N21/4349 , H04N7/17318 , H04N21/26275 , H04N21/4384 , H04N21/44209
摘要： A method and apparatus for staggercasting a plurality of content representative signals includes encoding a first and a corresponding second signal representing each of the plurality of content representative signals. A composite signal is generated comprising the plurality of first and second encoded signals. In the composite signal, each respective second encoded signal is delayed with respect to the corresponding first encoded signal. The first and second encoded signal representing a selected one of the content representative signals is extracted to reproduce the selected content representative signal. The extracted first encoded signal is decoded if an error is detected in the extracted second encoded signal, otherwise the extracted second encoded signal is decoded. When a different content representative signal is newly selected, the first extracted encoded signal is decoded until the delayed second extracted encoded signal is available.
摘要翻译：用于交错多个内容代表信号的方法和装置包括编码表示多个内容代表信号中的每一个的第一和相应的第二信号。产生包括多个第一和第二编码信号的复合信号。在复合信号中，每个相应的第二编码信号相对于对应的第一编码信号被延迟。提取表示选择的一个内容代表信号的第一和第二编码信号，以再现所选择的内容代表信号。如果在提取的第二编码信号中检测到错误，则提取的第一编码信号被解码，否则提取的第二编码信号被解码。当新选择不同的内容代表信号时，第一提取的编码信号被解码，直到延迟的第二提取的编码信号可用。

55. 发明申请

US20060056505A1 Robust mode staggercasting 有权
标题翻译：鲁棒的模式交错
公开(公告)号：US20060056505A1
公开(公告)日：2006-03-16
申请号：US10543044
申请日：2004-01-20
申请人： Kumar Ramaswamy , Jeffrey Cooper , Jill Boyce
发明人： Kumar Ramaswamy , Jeffrey Cooper , Jill Boyce
IPC分类号： H04N11/04 , H04N11/02 , H04N7/12 , H04B1/66
CPC分类号： H04N9/8042 , H04L1/02 , H04L1/08 , H04L27/02 , H04L2001/0098 , H04N5/85 , H04N19/00 , H04N19/107 , H04N19/12 , H04N19/142 , H04N19/164 , H04N19/169 , H04N19/172 , H04N19/176 , H04N19/188 , H04N19/20 , H04N19/36 , H04N19/37 , H04N19/39 , H04N19/61 , H04N19/63 , H04N19/89 , H04N19/895 , H04N21/234327 , H04N21/234363 , H04N21/234381 , H04N21/2362 , H04N21/2365 , H04N21/2383 , H04N21/2662 , H04N21/4347 , H04N21/4382 , H04N21/4383 , H04N21/631
摘要： A method and apparatus for staggercasting, encodes a first signal representing content and encodes a second signal representing the content using encoding relatively more robust than the encoding of the first encoded content representative signal. A composite signal including at least the first and second encoded signals is generated, in which one of the first and second encoded signals is delayed with respect to the other encoded signal. If an error is detected in the composite signal, then the undelayed encoded signal is decoded to reproduce the content. Otherwise, the delayed encoded signal is decoded to reproduce the content.
摘要翻译：一种用于交错广播的方法和装置，对表示内容的第一信号进行编码，并使用比第一编码内容代表信号的编码更加鲁棒的编码对使用表示内容的第二信号进行编码。生成包括至少第一和第二编码信号的复合信号，其中第一和第二编码信号中的一个相对于另一编码信号被延迟。如果在复合信号中检测到错误，则对未延迟的编码信号进行解码以再现内容。否则，对延迟编码的信号进行解码以再现内容。

56. 发明授权

US06980651B2 Method for using an access card to create a secure sub-network on a public network 失效
标题翻译：使用访问卡在公共网络上创建安全子网的方法
公开(公告)号：US06980651B2
公开(公告)日：2005-12-27
申请号：US09884722
申请日：2001-06-19
申请人： Louis Robert Litwin, Jr. , Kumar Ramaswamy , Michael Arthur Derrenberger
发明人： Louis Robert Litwin, Jr. , Kumar Ramaswamy , Michael Arthur Derrenberger
IPC分类号： H04L29/06 , H04L9/00 , H04K1/00
CPC分类号： H04L63/0442 , H04L63/062 , H04L63/0876
摘要： A method for creating a secure sub-network on a public network that includes a set of devices. The secure sub-network is to include a subset of devices from among the set of devices. An access card is provided having a first private key comprised thereon. The access card is scanned to determine the first private key, by the subset of devices. A master device is determined from among the subset of devices. A second private key is selected and a public key is computed based on the second private key, by the master device. The second private key is only known to the master device. The public key is sent to the set of devices, by the master device. A shared encryption key is computed, and an encryption is requested of any subsequent messages between any of the devices comprising the subset of devices using the shared encryption key.
摘要翻译：一种用于在包括一组设备的公共网络上创建安全子网的方法。该安全子网络将包括一组设备中的设备子集。提供具有包括在其上的第一私钥的访问卡。通过设备的子集来扫描访问卡以确定第一私钥。从设备的子集中确定主设备。主设备选择第二私钥并基于第二私钥计算公钥。第二个私钥只有主设备才知道。公钥由主设备发送到设备集。计算共享加密密钥，并且对包括使用共享加密密钥的设备子集的任何设备之间的任何后续消息请求加密。

57. 发明申请

US20050246751A1 Video on demand server system and method 有权
标题翻译：视频点播服务器系统和方法
公开(公告)号：US20050246751A1
公开(公告)日：2005-11-03
申请号：US10527125
申请日：2003-09-10
申请人： Jill Boyce , Kumar Ramaswamy
发明人： Jill Boyce , Kumar Ramaswamy
IPC分类号： H04L12/28 , H04L12/56 , H04N5/00 , H04N7/173 , H04N7/24 , H04N7/58
CPC分类号： H04N21/23655 , H04N21/23439 , H04N21/2365 , H04N21/2662 , H04N21/4347
摘要： A Video-on-Demand Server architecture transmits a plurality of pre-coded programs having different bit rates across a fixed bandwidth channel. For each program, a generator generates a plurality of different bit rate representations for each program. Each generator also provides control information at each of a plurality of successive time windows T for each bit rate representation. The control information provides a bit rate and a quality measure during each time window T. The control information enables a statistical multiplexer to select a bit rate representation for each program during each time window T to maximize the quality of the selected representations while not exceeding the total available channel capacity.
摘要翻译：视频点播服务器架构在固定带宽信道上发送具有不同比特率的多个预编码节目。对于每个程序，发生器为每个程序生成多个不同的比特率表示。每个发生器还在每个比特率表示的多个连续时间窗口T的每一个处提供控制信息。控制信息在每个时间窗口T期间提供比特率和质量测量。控制信息使得统计多路复用器能够在每个时间窗口T期间为每个节目选择比特率表示，以使所选表示的质量最大化，而不超过总可用频道容量。

58. 发明申请

US20050237389A1 Tuner input filter with electronically adjustable response for adapting to antenna characteristic 有权
标题翻译：调谐器输入滤波器，具有电子可调响应，适应天线特性
公开(公告)号：US20050237389A1
公开(公告)日：2005-10-27
申请号：US10512525
申请日：2003-04-25
申请人： Michael Pugel , Kumar Ramaswamy
发明人： Michael Pugel , Kumar Ramaswamy
IPC分类号： H03J3/22 , H03J1/00 , H03J3/18 , H03J3/20 , H04B1/18 , H04N5/33 , H04N5/50 , H04N5/52
CPC分类号： H04N5/50 , H03J1/0066 , H03J3/185 , H03J3/20 , H03J2200/28 , H04N5/52 , H04N21/4383 , H04N21/44209
摘要： A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to the RF tuner. The frequency response adjustment is preferably accomplished dynamically and/or with respect to each frequency tuned. Particularly, the system, method and/or apparatus provides compensation at the RF tuner level for mistuning effects produced on the RF tuner by antenna system impedance presented at the antenna input that is other than a designed for impedance. Frequency response of an RF input filter for the RF tuner is electronically adjustable with an independent or semi-independent control voltage signal based on one or more measured parameters of a tuning frequency. Frequency response adjustment may include adjustment of a center frequency of the RF input filter bandpass frequency range and/or altering the bandpass frequency range of the RF input filter. The subject invention expands the capability of an RF signal receiver, particularly one using at least one electronically adjustable RF filter at the input of an electronic alignment type tuner.
摘要翻译：系统，装置和/或方法基于向RF调谐器提供RF信号的接收的天线系统的阻抗来提供RF调谐器的RF输入滤波器的频率响应调整。频率响应调整优选地动态地和/或关于调谐的每个频率实现。特别地，系统，方法和/或设备在RF调谐器级别提供对在RF调谐器上产生的失谐效应的补偿，该天线系统阻抗呈现在除了被设计为阻抗之外的天线输入处。用于RF调谐器的RF输入滤波器的频率响应可以使用基于调谐频率的一个或多个测量参数的独立或半独立控制电压信号进行电子调节。频率响应调整可以包括调整RF输入滤波器带通频率范围的中心频率和/或改变RF输入滤波器的带通频率范围。本发明扩展了RF信号接收机的能力，特别是在电子对准型调谐器的输入处使用至少一个电子可调节RF滤波器的能力。

59. 发明授权

US06954793B2 Pre-paid data card authentication in a public wireless LAN access system 失效
标题翻译：公共无线局域网接入系统中的预付费数据卡认证
公开(公告)号：US06954793B2
公开(公告)日：2005-10-11
申请号：US10183081
申请日：2002-06-27
申请人： Kumar Ramaswamy , Charles Chuanming Wang , Junbaio Zhang , Sachin Satish Mody
发明人： Kumar Ramaswamy , Charles Chuanming Wang , Junbaio Zhang , Sachin Satish Mody
IPC分类号： H04L12/14 , G06Q20/02 , G06Q20/08 , G06Q20/38 , G06Q20/40 , G06Q30/04 , H04L9/32 , H04L12/28 , H04L29/06 , H04M17/00 , H04W12/06 , G06F15/173
CPC分类号： H04L63/0428 , G06Q20/027 , G06Q20/085 , G06Q20/0855 , G06Q20/382 , G06Q20/4012 , G06Q30/04 , H04L12/14 , H04L12/1403 , H04L12/1457 , H04L12/1467 , H04L12/2856 , H04L63/0823 , H04L63/083 , H04M17/00 , H04M17/10 , H04M2215/2033 , H04M2215/22 , H04M2215/32 , H04W4/24 , H04W12/06 , H04W74/00 , H04W84/12
摘要： A user (121, 122) can gain access to a Local Area Network (LAN) (20) on a fee basis without the risk of having to transmit an un-encrypted PIN at upon initial access. The user initially sends a request to the LAN identifying a Billing Agent (26) that maintains an account associated with the user for payment of LAN access charges. In practice, the account can take the form of a pre-paid account identified only by a PIN known to the user. After the user has identified the Billing Agent, the LAN queries the Billing Agent for its digital certificate, which the LAN forwards to the user. The user utilizes the certificate to encrypt a PIN for transmission via the LAN to the Billing Agent for authentication. Upon successful authentication, the Billing Agent authorizes the LAN to grant access to the user, thus allowing the user to obtain a connection via the LAN to a private network (14) or a public network (16).
摘要翻译：用户（12 1，12 2）可以以费用方式获得对局域网（LAN）（20）的访问，而不必发送un 加密PIN在初次访问时。用户最初向LAN识别出一个账单代理（26）的请求，该计费代理（26）维护与该用户相关联的帐户以支付LAN访问费用。实际上，该帐户可以采用仅由用户熟知的PIN识别的预付费帐户的形式。在用户识别出计费代理之后，LAN会向计费代理查询其数字证书，LAN将转发给用户。用户利用证书加密PIN，以便经由LAN传送到计费代理进行认证。在成功认证后，计费代理授权LAN授予对用户的访问，从而允许用户通过LAN获得到专用网络（14）或公共网络（16）的连接。

60. 发明授权

US06900828B2 Fade resistant digital transmission and reception system 有权
标题翻译：防褪色数字收发系统
公开(公告)号：US06900828B2
公开(公告)日：2005-05-31
申请号：US10484066
申请日：2002-07-19
申请人： Kumar Ramaswamy , Paul Gothard Knutson , Jeffrey Allen Cooper
发明人： Kumar Ramaswamy , Paul Gothard Knutson , Jeffrey Allen Cooper
IPC分类号： H04B1/16 , H04L1/00 , H04L12/56 , H04N5/21 , H04N5/44 , H04N7/24 , H04N7/26 , H04N19/89 , H04W24/00 , H04W28/14 , H04W72/12 , H04N7/06
CPC分类号： H04L1/08 , H04H20/30 , H04H20/42 , H04H20/72 , H04L1/007 , H04L1/0086 , H04L2001/0093 , H04N5/211 , H04N5/4401 , H04N19/37 , H04N19/39 , H04N19/67 , H04N19/89 , H04N21/234327 , H04N21/2365 , H04N21/2383 , H04N21/4347 , H04N21/4382 , H04N21/4392 , H04N21/44004 , H04N21/44209
摘要： In a digital broadcast communications system, a higher priority component and a lower priority component are broadcast from a transmitter to a receiver. Each of these components generates a main and a supplemental signal, and each supplemental signal is advanced in time with respect to the corresponding main signal. The main and supplemental signals for both the higher and lower priority components are combined into a single signal, which is broadcast to a receiver. In the receiver, the time advanced supplemental signals are stored in a buffer to time align them with their corresponding main signals. Both main signals are processed in the normal manner in the receiver, and are also monitored to detect a fading event. When a fading event is detected, the corresponding buffered supplemental signals are substituted for the faded main signals and normal processing continues.
摘要翻译：在数字广播通信系统中，从发射机到接收机广播较高优先权分量和较低优先权分量。这些部件中的每一个产生主要信号和补充信号，并且每个补充信号相对于相应的主信号在时间上提前。用于较高和较低优先级组件的主要和补充信号被组合成单个信号，其被广播到接收机。在接收机中，时间先进的补充信号被存储在缓冲器中以使它们与其相应的主信号对准。两个主信号在接收机中以正常方式进行处理，并被监控以检测衰落事件。当检测到衰落事件时，相应的缓冲补充信号代替衰落的主信号，并继续正常处理。

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