专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明授权

US06577650B1 Method of setting-up and controlling synchronization within a modem 有权
标题翻译：在调制解调器内设置和控制同步的方法
公开(公告)号：US06577650B1
公开(公告)日：2003-06-10
申请号：US09364132
申请日：1999-07-30
申请人： Christopher Neville Tate , Leslie Derek Humphrey , Roger James Williamson , Igor Kajetan Czajkowski
发明人： Christopher Neville Tate , Leslie Derek Humphrey , Roger James Williamson , Igor Kajetan Czajkowski
IPC分类号： H04J306
CPC分类号： H04L5/0048 , H04L5/1469 , H04L27/2655 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： To facilitate acquisition of lock in a multiple sub-channel carrier scheme, a plurality of time-continuous pilots (102) on known sub-channels are made available to an addressed unit across the frequency spectrum. The addressed unit is then able to select one of these pilots for training purposes and specifically for frequency and phase acquisition (106). The selection is based, typically, on the pilot with either the best signal to noise ratio or the first pilot to satisfy the minimum quality requirements for effective training. Discontinuous carriers, of which there can be several, are then used to identify a symbol boundary at the addressed unit. Once acquisition has been established, the pilots can, if desired, be released to carry low-bit rate traffic, although it is preferable to retain pilot tones for use within the system. Selection of the pilot from one of a number of alternative sub-channels distributed through the spectrum therefore ensures accurate synchronisation irrespective of whether portions of the spectrum are generally noisy and unclean.
摘要翻译：为了便于在多子载波方案中获取锁定，已知子信道上的多个时间连续的导频（102）对频谱上的寻址单元是可用的。所寻址的单元然后能够选择这些导频中的一个用于训练目的，特别是用于频率和相位采集（106）。该选择通常是基于具有最佳信噪比的飞行员或第一飞行员来满足有效训练的最低质量要求。然后使用其中可以有几个的不连续载波来识别寻址单元的符号边界。一旦获取已经建立，如果需要，导频可以被释放以携带低比特率业务，尽管优选地保留在系统内使用的导频音。因此，通过频谱分配的多个备选子信道之一选择导频，可以确保准确的同步，而不管频谱的各个部分是否一般噪声和不清洁。

82. 发明授权

US06574244B1 Determining time stamps in a data acquisition system 有权
标题翻译：确定数据采集系统中的时间戳
公开(公告)号：US06574244B1
公开(公告)日：2003-06-03
申请号：US09187582
申请日：1998-11-04
申请人： Robert William Petrie , Paul Richard Walton
发明人： Robert William Petrie , Paul Richard Walton
IPC分类号： H04J306
CPC分类号： H04J3/0644 , G01S5/0036
摘要： Streams of data packets and timing pulses are received from a source. Time stamping of the data packets is carried out largely independent of individual timing pulses. A normalised pulse time of arrival is calculated, preferably as a running average over the most recent arrivals. Times of applicability for the content of the packets can then be calculated according to a predetermined relationship between the order of arrival and of corresponding pulses and packets. Data acquisition may take place from an external or internal data source. An example external source is a GPS receiver.
摘要翻译：从源接收数据包流和定时脉冲数据流。数据包的时间戳在很大程度上独立于各个定时脉冲进行。计算归一化脉冲到达时间，优选地作为最近到达的运行平均值。然后可以根据到达顺序和对应的脉冲和分组之间的预定关系来计算分组内容的适用时间。数据采集可能来自外部或内部数据源。外部来源的示例是GPS接收器。

83. 发明授权

US06574225B2 Clock recovery in a packet-based data network 有权
标题翻译：基于数据包的数据网络中的时钟恢复
公开(公告)号：US06574225B2
公开(公告)日：2003-06-03
申请号：US09544737
申请日：2000-04-07
申请人： John C. Reynolds , Mike D. Nakamura
发明人： John C. Reynolds , Mike D. Nakamura
IPC分类号： H04J306
CPC分类号： H04J3/0632 , H04J3/0658 , H04L12/403 , H04N21/4305
摘要： A method for recovering clock signals includes generating a media sync signal to synchronize processing of digital media, and generating a transmission reference clock signal to define a duration of a transaction through a packet-based data network. The media sync and transmission clock signals may have different frequency and phase. The media is sent to a slave node of the network. The media sync and transmission clock signals are correlated to generate phase correlation information, and the phase correlation information is also sent to the slave node. Accordingly, a relatively low cost and reliable clock recovery technique suitable for synchronizing media streams across a packet-based data network is disclosed.
摘要翻译：一种用于恢复时钟信号的方法包括产生媒体同步信号以同步数字媒体的处理，并且通过基于分组的数据网络生成传输参考时钟信号以定义事务的持续时间。媒体同步和传输时钟信号可能具有不同的频率和相位。媒体被发送到网络的从节点。媒体同步传输时钟信号被相关联以产生相位相关信息，相位相关信息也被发送到从节点。因此，公开了一种适用于跨基于分组的数据网络同步媒体流的相对低成本且可靠的时钟恢复技术。

84. 发明授权

US06556590B1 Apparatus and methods for transmitting an MPEG-information signal and a method for reproducing that signal 失效
标题翻译：用于发送MPEG信息信号的装置和方法以及用于再现该信号的方法
公开(公告)号：US06556590B1
公开(公告)日：2003-04-29
申请号：US09187875
申请日：1998-11-06
申请人： Ronald W. J. .J. Saeijs , Imran A. Shah , Takashi Sato
发明人： Ronald W. J. .J. Saeijs , Imran A. Shah , Takashi Sato
IPC分类号： H04J306
CPC分类号： H04L12/40117 , G11B5/09 , G11B15/1875 , G11B20/12 , G11B20/1208 , G11B27/005 , G11B27/3027 , G11B27/3054 , G11B27/3063 , G11B27/309 , G11B2220/90 , H04N5/78263 , H04N5/78266 , H04N5/783 , H04N9/8042 , H04N9/8227 , H04N21/23406 , H04N21/23608 , H04N21/2381 , H04N21/4147 , H04N21/4305 , H04N21/4334 , H04N21/4344 , H04N21/4363 , H04N21/43632 , H04N21/4381 , H04N21/44004 , H04N21/8126 , H04N21/8455
摘要： A method of transmitting timing critical data via an asynchronous channel without changing any datum to be transmitted. The timing critical data can be an MPEG transport stream. The asynchronous channel can be a computer or telephone network, a digital storage media such as a digital VCR, or a digital interface. The method involves tagging each transmission unit of the data stream, before inputting to the channel, with timing information, and using the timing information at the output end of the channel to recreate the proper data timing. Various schemes are described for packing the timing information tags with each or a plurality of transmission units.
摘要翻译：一种通过异步通道发送定时关键数据的方法，而不改变要发送的任何数据。时序关键数据可以是MPEG传输流。异步通道可以是计算机或电话网络，诸如数字VCR的数字存储介质或数字接口。该方法包括在输入到信道之前用定时信息标记数据流的每个发送单元，并使用信道的输出端的定时信息来重建正确的数据定时。描述了用于利用每个或多个传输单元来打包定时信息标签的各种方案。

85. 发明授权

US06538656B1 Video and graphics system with a data transport processor 有权
标题翻译：具有数据传输处理器的视频和图形系统
公开(公告)号：US06538656B1
公开(公告)日：2003-03-25
申请号：US09640869
申请日：2000-08-18
申请人： Francis Cheung , Carolyn B. Walker , Glen A. Grover , Ben S. Giese
发明人： Francis Cheung , Carolyn B. Walker , Glen A. Grover , Ben S. Giese
IPC分类号： H04J306
CPC分类号： G06T9/007 , G09G5/001 , G09G5/02 , G09G5/024 , G09G5/026 , G09G5/06 , G09G5/12 , G09G5/14 , G09G5/28 , G09G5/346 , G09G5/36 , G09G2310/0224 , G09G2320/0247 , G09G2340/02 , G09G2340/0407 , G09G2340/10 , G09G2340/125 , G09G2360/02 , G09G2360/121 , G09G2360/125 , G09G2360/128 , H04N5/126 , H04N5/14 , H04N5/4401 , H04N5/44504 , H04N5/44508 , H04N5/44591 , H04N5/45 , H04N5/46 , H04N7/0135 , H04N9/45 , H04N9/641 , H04N9/642 , H04N11/143 , H04N11/20 , H04N19/42 , H04N19/423 , H04N19/436 , H04N19/44 , H04N19/61 , H04N21/42204 , H04N21/42653 , H04N21/4305 , H04N21/4316 , H04N21/434 , H04N21/4438 , H04N21/47
摘要： A video and graphics system uses multiple transport processors to receive compressed data streams to perform PID and section filtering as well as DVB and DES decryption and to demultiplex them. The compressed data streams may include in-band and out-of-band MPEG Transport streams. The video and graphics system processes the PES into digital audio, MPEG video and message data. A core transport processor includes a PCR recovery module for extracting PCRs contained in the compressed data streams and for providing the extracted PCRs to a video transport processor and an audio decode processor. The PCR recovery module has a direct load capability for receiving user defined PCRs and outputting them instead of outputting the extracted PCRs. The PCR recovery module extracts PCRs from both MPEG Transport streams and DIRECTV transport streams. The core transport processor may also include a transport recorder for storing portions of compressed data streams and a playback circuit for reading the stored portions of the compressed data streams. The playback circuit includes a throttling mechanism and a hold mechanism to prevent buffer overflow.
摘要翻译：视频和图形系统使用多个传输处理器来接收压缩数据流，以执行PID和部分滤波以及DVB和DES解密，并将其解复用。压缩数据流可以包括带内和带外MPEG传输流。视频和图形系统将PES处理成数字音频，MPEG视频和消息数据。核心传输处理器包括用于提取压缩数据流中包含的PCR的PCR恢复模块，以及将提取的PCR提供给视频传输处理器和音频解码处理器。 PCR恢复模块具有用于接收用户定义的PCR并输出它们的直接负载能力，而不是输出提取的PCR。 PCR恢复模块从MPEG传输流和DIRECTV传输流中提取PCR。核心传输处理器还可以包括用于存储压缩数据流的部分的传输记录器和用于读取压缩数据流的存储部分的重放电路。回放电路包括节流机构和保持机构以防止缓冲器溢出。

86. 发明授权

US06535527B1 Low latency, low power deserializer 有权
标题翻译：低延迟，低功耗解串器
公开(公告)号：US06535527B1
公开(公告)日：2003-03-18
申请号：US09302193
申请日：1999-04-29
申请人： Michael L. Duffy
发明人： Michael L. Duffy
IPC分类号： H04J306
CPC分类号： H03M9/00 , H03L7/06 , H04J3/0685 , H04L7/033 , H04L7/0331 , H04L7/04 , Y10S370/914
摘要： An apparatus comprising a first circuit, a deserializer circuit and a framer circuit. The first circuit may be configured to present a clock signal and a data signal having a second data rate in response to an input signal having a first data rate. The deserializer circuit may comprise (a) a parallel register bank configured to generate an output signal in response to (i) the clock signal, (ii) the data signal and (iii) one or more select signals and (b) a state machine configured to generate the one or more select signals in response to one or more control signals. The framer circuit may be configured to generate the one or more control signals in response to (i) one or more input control signals and (ii) the output signal.
摘要翻译：一种包括第一电路，解串行器电路和成帧器电路的装置。第一电路可以被配置为响应于具有第一数据速率的输入信号呈现具有第二数据速率的时钟信号和数据信号。解串行器电路可以包括（a）并行寄存器组，其被配置为响应于（i）时钟信号，（ii）数据信号和（iii）一个或多个选择信号而产生输出信号，以及（b）状态机被配置为响应于一个或多个控制信号而生成所述一个或多个选择信号。成帧器电路可以被配置为响应于（i）一个或多个输入控制信号和（ii）输出信号而产生一个或多个控制信号。

87. 发明授权

US06529527B1 Method and apparatus for carrying packetized voice and data in wireless communication networks 有权
标题翻译：用于在无线通信网络中传送分组语音和数据的方法和装置
公开(公告)号：US06529527B1
公开(公告)日：2003-03-04
申请号：US09612075
申请日：2000-07-07
申请人： Tao Chen , Nikolai K. N. Leung , Raymond Tah-Sheng Hsu
发明人： Tao Chen , Nikolai K. N. Leung , Raymond Tah-Sheng Hsu
IPC分类号： H04J306
CPC分类号： H04W28/06 , H04L1/18
摘要： A method and apparatus for reducing transmission delay in a wireless communication system that carries packetized voice and data information. Interruptions in the traffic channels cause loss of synchronization between a header compressor and a header decompressor. Rather than transmitting resynchronization information on the traffic channel, the information dropped by an interruption is re-transmitted on a non-traffic channel in parallel with the traffic channel. At the remote station, information from the traffic channel and the non-traffic channel is reassembled before input into the decompressor. Alternatively, the non-traffic channel can be used to carry overflow information so that a higher average data rate can be achieved than the average data rate of the traffic channel alone.
摘要翻译：一种在携带分组语音和数据信息的无线通信系统中减少传输延迟的方法和装置。业务信道中的中断导致报头压缩器和报头解压缩器之间的同步丢失。不是在业务信道上发送再同步信息，而是在与业务信道并行的非业务信道上重新发送由中断丢弃的信息。在远程站处，在输入到解压缩器之前重新组合来自业务信道和非业务信道的信息。或者，非业务信道可以用于承载溢出信息，使得可以实现比单独的业务信道的平均数据速率更高的平均数据速率。

88. 发明授权

US06516005B1 Apparatus and method for data decoding 有权
标题翻译：数据解码装置及方法
公开(公告)号：US06516005B1
公开(公告)日：2003-02-04
申请号：US09224052
申请日：1998-12-31
申请人： Shu Murayama , Takeshi Mio , Hiroshi Honma , Susumu Oka
发明人： Shu Murayama , Takeshi Mio , Hiroshi Honma , Susumu Oka
IPC分类号： H04J306
CPC分类号： H04N21/4307 , H04N21/4341
摘要： The object of this invention is to realize the correct and prompt synchronization of data in decoding and reproducing multiplexed coded data multiplexed with a plurality of media coded data in the unit of packet without regard to the configuration or characteristics of the apparatus. To achieve a data decoder that can synchronize the video and audio data correctly, the timing controller obtains a buffering time indicated by the time difference between the decoding end time and the specified presentation time contained in the data, and data buffering is performed by buffer memory. The video decoding end time is latched from the system time counter according to a timing pulse generated by the video decoder when the first decoded data is output from video decoder after the data decoder is activated.
摘要翻译：本发明的目的是在数据单元内实现解码和再现与多个媒体编码数据多路复用的多路复用编码数据中的数据的正确和迅速的同步，而不考虑设备的配置或特性。为了实现能够正确同步视频和音频数据的数据解码器，定时控制器获得由解码结束时间和包含在数据中的指定呈现时间之间的时间差指示的缓冲时间，并且数据缓冲由缓冲存储器。在数据解码器被激活之后，当从视频解码器输出第一解码数据时，根据由视频解码器产生的定时脉冲，从系统时间计数器锁存视频解码结束时间。

89. 发明授权

US06496488B1 Modularly clustered radiotelephone system 失效
标题翻译：模块化集群无线电话系统
公开(公告)号：US06496488B1
公开(公告)日：2002-12-17
申请号：US09704318
申请日：2000-11-02
申请人： David M. Cooley , Joseph J. DiGiovanni , John D. Kaewell , Scott D. Kurtz , Mark A. Lemmo , Michael W. Regensburg , David Vessal , Eric Johns
发明人： David M. Cooley , Joseph J. DiGiovanni , John D. Kaewell , Scott D. Kurtz , Mark A. Lemmo , Michael W. Regensburg , David Vessal , Eric Johns
IPC分类号： H04J306
CPC分类号： H04J3/0685 , H04B1/1615 , H04B7/2643 , H04B7/2656 , H04W48/08 , H04W52/0216 , H04W56/00 , H04W72/042 , H04W72/0446 , H04W72/10 , H04W74/0891 , H04W84/14 , H04W88/00 , H04W88/021 , H04W88/08 , Y02D70/40 , Y02D70/449
摘要： A power-conserving time division multiple access (TDMA) radio telephone system is disclosed in which a cluster of subscriber stations, remote from a base station, employs a common pool of frequency-agile modems each of-which digitally synthesizes, on a timeSlot-by-timeSlot basis, the different channel-identifying intermediate frequencies needed to support communications between several of the subscriber stations and the base station. Power conservation is facilitated inter alia by controlling the assignment of modems to calls, maintaining unassigned modems in a powered-down state and by controlling the number of calls using the same time slot. Delay in assigning a powered-down modem to a call is eliminated by making available to all modems the highest quality synchronization information obtained by any of the active modems.
摘要翻译：公开了一种功率节省时分多址（TDMA）无线电话系统，其中远离基站的用户站群在时隙上采用每个频率合成调制解调器的数字合成调制解调器，用于支持几个用户站和基站之间的通信所需的不同的信道识别中间频率。通过控制调制解调器对呼叫的分配，维护未分配的调制解调器处于掉电状态以及通过使用相同的时隙控制呼叫的数量来促进功率节省。通过向所有调制解调器提供由任何活动调制解调器获得的最高质量的同步信息，可以消除将分配掉电调制解调器的延迟分配给呼叫。

90. 发明授权

US06477183B1 Economical synchronization system for asynchronous transfer mode mobile communication network without dependence on external system 失效
标题翻译：用于异步传输模式的经济同步系统移动通信网络，而不依赖于外部系统
公开(公告)号：US06477183B1
公开(公告)日：2002-11-05
申请号：US09189635
申请日：1998-11-10
申请人： Masatoshi Yamamoto
发明人： Masatoshi Yamamoto
IPC分类号： H04J306
CPC分类号： H04J3/0682 , H04J3/0658 , H04L2012/5674
摘要： An asynchronous transfer mode network includes a high-level station and a mobile station in a boundary zone between service cells of wireless base stations connected to the high-level station through asynchronous transfer mode channels, wherein the high level station transmits a control message through the asynchronous transfer mode channels and the wireless base stations to the mobile station and receives response messages from the mobile station through the wireless base stations and the asynchronous transfer mode channels, and determines a difference between transmission time lags along the asynchronous transfer mode channels so as to make built-in clocks provided for the wireless base stations synchronous with one another.
摘要翻译：异步传输模式网络包括在通过异步传输模式信道连接到高级站的无线基站的服务小区之间的边界区域中的高级站和移动站，其中高级站通过该高级站发送控制消息异步传输模式信道和无线基站到移动站，并且通过无线基站和异步传输模式信道接收来自移动站的响应消息，并且确定沿着异步传输模式信道的传输时间滞后之间的差异，以便使无线基站的内置时钟彼此同步。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式