-
1.发明授权Cable television radio frequency subscriber data transmission apparatus and RF return method 失效电缆电视无线电频率订户数据传输设备和RF返回方法
公开(公告)号：US5235619A
公开(公告)日：1993-08-10
申请号：US498083
申请日：1990-03-20
申请人： Robert J. Beyers, II , Charles R. Bramhall , Gregory S. Durden , Robert J. Edwards , Ray T. Haman, Jr. , Douglas J. Hoder , Donald R. Huntley , John A. Kennedy , Emory L. McGinty, Jr. , Jay C. McMullan, Jr. , David J. Naddor , Randolph J. Schaubs , Jesse M. Still , Anthony J. Wasilewski , Lamar E. West, Jr. , Donovan S. White
发明人： Robert J. Beyers, II , Charles R. Bramhall , Gregory S. Durden , Robert J. Edwards , Ray T. Haman, Jr. , Douglas J. Hoder , Donald R. Huntley , John A. Kennedy , Emory L. McGinty, Jr. , Jay C. McMullan, Jr. , David J. Naddor , Randolph J. Schaubs , Jesse M. Still , Anthony J. Wasilewski , Lamar E. West, Jr. , Donovan S. White
IPC分类号： H04J1/00 , H04L27/20 , H04N21/258 , H04N21/442
CPC分类号： H04N21/44222 , H04L27/2035 , H04N21/25891
摘要： A method of transferring a data message from a remote unit to a central location is provided. A plurality of data channels is selected for transmitting the data message from the remote unit to the central location. At least one random transmit time is generated for transmitting the data message for each of the plurality of data channels. The data message is transmitted over the plurality of data channels at the transmit times. An apparatus for transferring a data message from a remote unit to a central location is also provided.
摘要翻译： 提供了将数据消息从远程单元传送到中心位置的方法。 选择多个数据信道用于将数据消息从远程单元发送到中心位置。 生成用于发送多个数据信道中的每一个的数据消息的至少一个随机发送时间。 数据消息在发送时通过多个数据信道发送。 还提供了一种用于将数据消息从远程单元传送到中心位置的装置。
-
公开(公告)号：US5155590A
公开(公告)日：1992-10-13
申请号：US498084
申请日：1990-03-20
申请人： Robert J. Beyers, II , Charles R. Bramhall , Gregory S. Durden , Robert J. Edwards , Ray T. Haman, Jr. , Douglas J. Hoder , Donald R. Huntley , John A. Kennedy , Emory L. McGinty, Jr. , Jay C. McMullan, Jr. , David J. Naddor , Randolph J. Schaubs , Jesse M. Still , Anthony J. Wasilewski , Lamar E. West, Jr. , Donovan S. White
发明人： Robert J. Beyers, II , Charles R. Bramhall , Gregory S. Durden , Robert J. Edwards , Ray T. Haman, Jr. , Douglas J. Hoder , Donald R. Huntley , John A. Kennedy , Emory L. McGinty, Jr. , Jay C. McMullan, Jr. , David J. Naddor , Randolph J. Schaubs , Jesse M. Still , Anthony J. Wasilewski , Lamar E. West, Jr. , Donovan S. White
IPC分类号： G06F21/10 , H04H20/76 , H04H20/78 , H04H60/32 , H04L1/00 , H04L5/06 , H04L27/20 , H04L27/227 , H04N7/10 , H04N7/173 , H04N21/258 , H04N21/442
CPC分类号： H04N21/44222 , H04L27/2035 , H04L27/2276 , H04L5/06 , H04N21/25891 , H04N7/10 , H04N7/17309
摘要： Automatic level calibration apparatus for transmitting data from a cable television terminal to the headend of a cable television system comprises programmable transmitter apparatus of the terminal, programmable receiving apparatus at the headend and a calibration controller. Responsive to an addressed command from the headend, the programmable transmitter apparatus returns a sequence of levels at a particular calibration frequency. The programmable receiver apparatus determines an indication of the received signal strength of each of the levels of the sequence of levels. The controller determines an optimum level for transmissions from the terminal.
摘要翻译： 用于将数据从有线电视终端发送到有线电视系统的前端的自动电平校准装置包括终端的可编程发送装置，头端的可编程接收装置和校准控制器。 响应于来自头端的寻址命令，可编程发射机设备以特定校准频率返回级别序列。 可编程接收机装置确定每个级别级别的接收信号强度的指示。 控制器确定来自终端的传输的最佳等级。
-
公开(公告)号：US5550825A
公开(公告)日：1996-08-27
申请号：US794477
申请日：1991-11-19
IPC分类号： H04H20/30 , H04H20/79 , H04H40/90 , H04H60/15 , H04H60/23 , H04N7/10 , H04N21/2365 , H04N21/434 , H04J1/00 , H04N7/14
CPC分类号： H04H40/90 , H04H20/30 , H04H20/79 , H04N21/2365 , H04N21/4347 , H04N7/10 , H04H2201/70 , H04H60/15 , H04H60/23
摘要： A headend method and apparatus for a digital transmission system is provided which includes inputs for receiving first and second program information from first and second program sources and inputs for receiving first and second control information from first and second control sources. The first and second program information is applied to a switching circuit and a switch control controls the switching circuit to output channels of program information comprising combinations of the first and second program information for output to a subscriber. Processing circuitry allows for selectively providing the first and second control information to the channels output from the switching circuit.
摘要翻译： 提供了一种用于数字传输系统的前端方法和装置，其包括用于从第一和第二节目源接收第一和第二节目信息的输入以及用于从第一和第二控制源接收第一和第二控制信息的输入。 第一和第二节目信息被应用于切换电路，并且开关控制控制切换电路以输出包括第一和第二节目信息的组合的节目信息的频道，以输出到用户。 处理电路允许选择性地将第一和第二控制信息提供给从开关电路输出的通道。
-
公开(公告)号：US5142690A
公开(公告)日：1992-08-25
申请号：US503422
申请日：1990-04-02
CPC分类号： H04N21/44222 , H04L27/2035 , H04L27/2276 , H04L5/06 , H04N21/25891 , H04N7/10 , H04N7/17309
摘要： A cable television radio frequency data processor for receiving and processing data transmitted from a cable television terminal to the headend of a cable television system comprises a plurality of data receivers for receiving the returned data, detectors associated with each receiver for providing an indication of received signal strength and a data processor. The data processor responsive to the data receivers eliminates redundant data and collects statistics on data throughput and, responsive to the detectors, collects statistics on received signal strength. The data processor then may initiate recalibration of transmit signal levels or an appropriate selection of data transmit channels as required.
摘要翻译： 用于接收和处理从有线电视终端发送到有线电视系统的头端的数据的有线电视射频数据处理器包括用于接收返回数据的多个数据接收器，与每个接收机相关联的检测器，用于提供接收信号的指示 实力和数据处理器。 响应于数据接收器的数据处理器消除冗余数据并且收集关于数据吞吐量的统计信息，并且响应于检测器收集关于接收信号强度的统计。 然后，数据处理器可以根据需要启动发送信号电平的重新校准或数据发送信道的适当选择。
-
-
-
搜索结果
4 条记录 (耗时 0.064 秒)
