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    Cable television radio frequency data processor
    3.
    发明授权
    Cable television radio frequency data processor 失效
    电缆电视无线电频率数据处理器

    公开(公告)号：US5142690A

    公开(公告)日：1992-08-25

    申请号：US503422

    申请日：1990-04-02

    申请人： Jay C. McMullan, Jr. ,  Douglas J. Hoder ,  Donald R. Huntley

    发明人： Jay C. McMullan, Jr. ,  Douglas J. Hoder ,  Donald R. Huntley

    IPC分类号： H04H20/76 ,  H04L1/00 ,  H04L5/06 ,  H04L27/20 ,  H04L27/227 ,  H04N7/10 ,  H04N7/173

    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。

    In-band controller
    5.
    发明授权
    In-band controller 失效
    带内控制器

    公开(公告)号：US5058160A

    公开(公告)日：1991-10-15

    申请号：US593329

    申请日：1990-10-01

    申请人： Robert O. Banker ,  Randolph Schaubs ,  Michael Harney ,  Jay C. McMullan, Jr. ,  Anthony Wasilewski ,  Gregory S. Durden ,  Rdy T. Haman, Jr. ,  David Naddor ,  William B. Thatcher, Jr.

    发明人： Robert O. Banker ,  Randolph Schaubs ,  Michael Harney ,  Jay C. McMullan, Jr. ,  Anthony Wasilewski ,  Gregory S. Durden ,  Rdy T. Haman, Jr. ,  David Naddor ,  William B. Thatcher, Jr.

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1675

    摘要： The present invention discloses a method and apparatus for providing a cable TV system with the ability to issue information from a system manager, determine whether the information is intended for a set top designed to receive out-of-band information or in-band information, send the information to the appropriate circuitry. Reformatting of some information is necessary and is performed by a format translator. For in-band information, information may be sent over one or more of a plurality of data streams. Certain types of information are sent over one or more data streams based on the type of information and characteristics of the data streams. It is further disclosed that for efficiency, similar information intended for several addresses is grouped together in a database manager so that the information may be sent to plural addresses at one time. Scramblers are employed with the capability of inserting data onto nonscrambled channels.

    摘要翻译： 本发明公开了一种用于向有线电视系统提供从系统管理器发出信息的能力的方法和装置，确定信息是否针对被设计为接收带外信息或带内信息的机顶盒， 将信息发送到相应的电路。 重新格式化某些信息是必要的，并由格式转换器执行。 对于带内信息，可以通过多个数据流中的一个或多个来发送信息。 基于信息的类型和数据流的特性，通过一个或多个数据流发送某些类型的信息。 进一步公开的是，为了效率，用于多个地址的类似信息被分组在一起在数据库管理器中，使得可以一次将信息发送到多个地址。 使用加扰器将数据插入非加扰信道的能力。

    Automatic frequency selection in a bi-directional cable television system
    7.
    发明授权
    Automatic frequency selection in a bi-directional cable television system 失效
    双向有线电视系统中的自动频率选择

    公开(公告)号：US5225902A

    公开(公告)日：1993-07-06

    申请号：US671539

    申请日：1991-03-19

    申请人： Jay C. McMullan, Jr.

    发明人： Jay C. McMullan, Jr.

    IPC分类号： H04H20/38 ,  H04H20/42 ,  H04H60/22 ,  H04H60/96 ,  H04H60/97 ,  H04L5/06 ,  H04L27/20 ,  H04L27/227 ,  H04N7/10 ,  H04N7/173 ,  H04N21/258 ,  H04N21/442

    CPC分类号： H04N7/17309 ,  H04H20/42 ,  H04H60/96 ,  H04H60/97 ,  H04L27/2035 ,  H04L27/2276 ,  H04L5/06 ,  H04N21/25891 ,  H04N21/44222 ,  H04N7/10 ,  H04H20/38 ,  H04H2201/70 ,  H04H60/22

    摘要： A method for automatically selecting optimum frequencies for transmitting data from remote terminals upstream to a system manager is provided. The system manager initially selects a set of frequencies from a larger set of available frequencies and transmits a command downstream to each remote terminal indicating which frequencies to use. Each remote terminal transmits data messsages on each selected frequency in response to addressed commands generated by the system manager. The system manager receives and counts the data messages on each of the frequencies, and after a statistically significant number of messages are received, removes from use the frequency with the lowest number of data messages received. This frequency is replaced with either (1) a previously untried frequency, or if all frequencies have been tried, (2) a previously tried frequency with the highest number of data messages received. In a preferred embodiment, new frequencies are removed from use and added to use only when the number of data messages received and the received signal level on a particular frequency falls within certain predetermined ranges. In another embodiment, the transmission level for a particular frequency is recalibrated when the number of data message received and the received signal level falls within other predetermined ranges. In a further embodiment, two or more sets of optimum frequencies are automatically chosen for different times during the day and the system manager is able to immediately switch between these sets at the appropriate times.

    摘要翻译： 提供了一种用于自动选择从上游向系统管理器发送数据的最佳频率的方法。 系统管理器最初从较大的一组可用频率中选择一组频率，并向每个远程终端下游发送一个指示要使用哪些频率的命令。 每个远程终端响应于系统管理器生成的寻址命令，在每个选定频率上传输数据信息。 系统管理器接收并对每个频率上的数据消息进行计数，并且在接收到统计上显着数量的消息之后，从接收到的数据消息数最少的频率中删除。 该频率被替换为（1）先前未经测试的频率，或者如果已经尝试所有频率，则（2）先前尝试的接收到数据消息数最多的频率。 在优选实施例中，新频率从使用中移除并且仅在接收到的数据消息的数量和特定频率上的接收信号电平落入特定预定范围内时被使用。 在另一个实施例中，当接收到的数据消息的数量和接收的信号电平落入其他预定范围内时，针对特定频率的传输电平被重新校准。 在另一实施例中，在白天的不同时间自动选择两组或更多组最佳频率，并且系统管理员能够在适当的时间立即在这些组之间切换。

    Method and apparatus for RF data transfer in a CATV system
    9.
    发明授权
    Method and apparatus for RF data transfer in a CATV system 失效
    用于CATV系统中RF数据传输的方法和装置

    公开(公告)号：US5255086A

    公开(公告)日：1993-10-19

    申请号：US562675

    申请日：1990-08-03

    申请人： Jay C. McMullan, Jr. ,  David J. Naddor ,  Robert J. Beyers, II

    发明人： Jay C. McMullan, Jr. ,  David J. Naddor ,  Robert J. Beyers, II

    IPC分类号： H04H1/00 ,  H04H20/42 ,  H04H60/96 ,  H04L5/06 ,  H04L25/49 ,  H04L27/20 ,  H04L27/227 ,  H04N7/10 ,  H04N7/173 ,  H04H1/02

    CPC分类号： H04H20/42 ,  H04H60/96 ,  H04L25/4904 ,  H04L27/2035 ,  H04L27/2276 ,  H04L5/06 ,  H04N21/25891 ,  H04N21/44222 ,  H04N7/10 ,  H04N7/17309

    摘要： A method of controlling the allocation of a population of remote units among a plurality of groups of remote units is provided. Each remote unit has a digital identifier respectively associated therewith. A maximum and a minimum average number of remote units per group is fixed. The remote units are assigned to the groups of remote units in accordance with the respective digital identifiers. The average number of remote units per group is then determined as remote units are assigned thereto. Next, the average number of remote units per group is compared to the fixed maximum number of remote units per group. The above steps are repeated while the average number of remote units per group is less than or equal to the fixed maximum number of remote units per group. The number of groups is changed such that the average number of remote units per group is between the fixed maximum and minimum number of remote units per group if the average number of remote units per group exceeds the maximum number of remote units per group.

    摘要翻译： 提供了一种控制多组远程单元中的远程单元群的分配的方法。 每个远程单元具有分别与其相关联的数字标识符。 每组的最大和最小平均数远程单位是固定的。 根据相应的数字标识符将远程单元分配给远程单元组。 然后确定每组的远程单元的平均数，因为远程单元被分配给它。 接下来，将每组的远程单元的平均数量与每组的固定最大数量的远程单元进行比较。 重复上述步骤，而每组的远程单元的平均数量小于或等于每组的固定最大数量的远程单元。 更改组的数量，使得每组的远程单元的平均数量在每个组的远程单元的固定最大和最小数量之间，如果每个组的远程单元的平均数量超过每个组的最大数量的远程单元。

    Digital audio data muting system and method
    10.
    发明授权
    Digital audio data muting system and method 失效
    数字音频数据静音系统及方法

    公开(公告)号：US5271011A

    公开(公告)日：1993-12-14

    申请号：US852283

    申请日：1992-03-16

    申请人： Jay C. McMullan, Jr. ,  Lee R. Johnson

    发明人： Jay C. McMullan, Jr. ,  Lee R. Johnson

    IPC分类号： G11B20/18 ,  G11B20/24 ,  H04L1/20 ,  H04N5/926 ,  H04N5/945

    CPC分类号： H04N5/945 ,  G11B20/1806 ,  G11B20/1876 ,  G11B20/24 ,  H04L1/20 ,  H04N5/9265

    摘要： A system and method for disabling the output of a data transmission system when a relatively high error rate is detected in the transmitted signal. The error muting technique of the invention functions as the digital equivalent of a leaky integrator with hysteresis. In particular, the signal quality of the received data transmission is monitored, and a predetermined value is added to an accumulator or error counter when an error is detected. This value varies depending upon the nature of the detected error such that more serious errors are given greater error values. The error counter is also decremented by one or some other amount at a programmable time interval in accordance with the maximum acceptable error rate. The error count (accumulator sum) is continuously compared to a programmable error threshold, and if the threshold is exceeded, the output of the data transmission system is disabled, or in the case of a digital audio transmission system, is muted. Once disabled or muted, the output is not reenabled or unmuted until the error counter is decremented all the way down to a lower limit such as zero. In a particular embodiment of the invention, the error counter is decremented at a different rate when the output of the data transmission system has been disabled or muted so that the system may be more or less rapidly returned to normal operation.

    摘要翻译： 一种在发送信号中检测到较高错误率时禁止数据传输系统的输出的系统和方法。 本发明的误差抑制技术作为具有迟滞的泄漏积分器的数字等效物。 特别地，监视接收到的数据传输的信号质量，并且当检测到错误时，将预定值添加到累加器或错误计数器。 该值根据检测到的错误的性质而变化，使得更严重的错误被给予更大的误差值。 错误计数器还根据最大可接受的错误率以可编程的时间间隔递减一个或其他量。 误差计数（累加器和）与可编程误差阈值连续比较，如果超过阈值，数据传输系统的输出被禁止，或者在数字音频传输系统的情况下被静音。 一旦禁用或静音，输出不会重新启用或取消静音，直到错误计数器一直下降到下限为止。 在本发明的特定实施例中，当数据传输系统的输出被禁用或静音时，错误计数器以不同的速率递减，使得系统可能或多或少地快速地恢复到正常操作。