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    Automatic frequency selection in a bi-directional cable television system
    131.
    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

    Applicant: Jay C. McMullan, Jr.

    Inventor： Jay C. McMullan, Jr.

    IPC: 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 classification number: 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

    Abstract: 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.

    Abstract translation: 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。

    Presentation player for an interactive digital communication system
    132.
    发明授权
    Presentation player for an interactive digital communication system 失效
    交互式数字通信系统演示播放器

    公开(公告)号：US5208665A

    公开(公告)日：1993-05-04

    申请号：US657245

    申请日：1991-02-15

    Applicant: Karl W. McCalley ,  Steven D. Wilson ,  James L. Fischer ,  Kenneth P. Belau

    Inventor： Karl W. McCalley ,  Steven D. Wilson ,  James L. Fischer ,  Kenneth P. Belau

    IPC: H04H1/00 ,  H04H20/78 ,  H04H60/14 ,  H04N7/173

    CPC classification number: H04H60/14 ,  H04N21/21 ,  H04N21/23 ,  H04N21/4755 ,  H04N7/17354 ,  H04H20/78 ,  H04H2201/70 ,  H04N2007/1739

    Abstract: A presentation player is described for use in an interactive digital communications system which may selectively communicate particular multimedia presentations to each of a plurality of subscribers along a CATV cable network, or other communications network. The player is part of a digital interactive system that distributes information representing requested presentations in the form of digital data on distribution channels to a plurality of presentation players located along the communications network. Each of the subscribers has a television set connected to one of these presentation players. The digital data is uniquely addressed to a particular subscriber and is processed by his corresponding presentation player to produce analog TV signals comprising the multimedia presentation. The presentation player automatically tunes itself to a distribution channel and can process data which include motion video sequences, background music, and real-time live video images, in addition to still-video images with audio commentary. The presentation player of the present invention comprises a converter capable of receiving the distribution channel frequencies and selecting one of those frequencies for further processing of digital data transmitted thereon.

    Abstract translation: 描述用于交互式数字通信系统中的呈现播放器，其可以沿着CATV有线网络或其他通信网络选择性地向多个订户中的每一个传送特定的多媒体呈现。 播放器是数字交互系统的一部分，其以分发频道上的数字数据的形式将表示所请求的演示的信息分发给沿着通信网络定位的多个呈现播放器。 每个用户具有连接到这些呈现播放器之一的电视机。 数字数据被唯一地寻址到特定用户，并且由他的相应的演示播放器处理以产生包括多媒体呈现的模拟电视信号。 呈现播放器自动调谐到分发通道，并且除了具有音频评论的静止图像图像之外，还可以处理包括运动视频序列，背景音乐和实时实况视频图像的数据。 本发明的演示播放器包括能够接收分配频道频率并选择其中一个频率以用于进一步处理在其上传送的数字数据的转换器。

    Technique for using a subcarrier frequency of a radio station to transmit, receive and display a message together with audio reproduction of the radio program
    133.
    发明授权
    Technique for using a subcarrier frequency of a radio station to transmit, receive and display a message together with audio reproduction of the radio program 失效
    使用无线电台的副载波频率与无线电节目的音频再现一起发送，接收和显示消息的技术

    公开(公告)号：US5146612A

    公开(公告)日：1992-09-08

    申请号：US697728

    申请日：1991-05-03

    Applicant: Jon P. Grosjean ,  Stuart E. Ross ,  Daniel J. Semple

    Inventor： Jon P. Grosjean ,  Stuart E. Ross ,  Daniel J. Semple

    IPC: G08G1/09 ,  H04H20/34

    CPC classification number: H04H20/34 ,  H04H2201/70

    Abstract: A message is transmitted on a subcarrier of a main carrier frequency of a radio station. The message is displayed simultaneously with the audible reproduction of the radio program. The message is capable of being displayed dynamically by having different portions thereof sequencing through the display device until the entire message is concluded and/or using a variety of possible display attributes, such as scrolling and flashing. One feature involves scanning the radio band for a station that carries the message. Scanning of a plurality of subcarriers at each station is also performed. One embodiment transmits the message during the "dead time" of other programming normally transmitted on the same subcarrier. The alphanumeric characters of the message are preferably converted prior to transmission into a signal with an average value of zero. The converted characters are decoded at the receiver.

    Abstract translation: 在无线电台的主载波频率的子载波上发送消息。 该消息与无线电节目的可听再现同时显示。 该消息能够通过使其不同部分通过显示设备排序直到整个消息结束和/或使用各种可能的显示属性（例如滚动和闪烁）来动态地显示。 一个特征涉及扫描携带消息的站的无线电频带。 还执行在每个站处扫描多个子载波。 一个实施例在正常在相同子载波上发送的其他编程的“死区时间”期间发送消息。 消息的字母数字字符优选地在传输之前被转换成平均值为零的信号。 转换的字符在接收器处被解码。

    Electronic information dissemination system
    134.
    发明授权
    Electronic information dissemination system 失效
    电子信息传播系统

    公开(公告)号：US4695880A

    公开(公告)日：1987-09-22

    申请号：US760491

    申请日：1985-07-30

    Applicant: Terry W. Johnson ,  Daryl E. Harms ,  Ricky L. Curl

    Inventor： Terry W. Johnson ,  Daryl E. Harms ,  Ricky L. Curl

    IPC: H04N7/16 ,  H04H20/76 ,  H04H20/79 ,  H04H60/27 ,  H04M11/08 ,  H04N7/03 ,  H04H1/04 ,  H04N7/10

    CPC classification number: H04N7/03 ,  H04H20/76 ,  H04H20/79 ,  H04H60/27 ,  H04M11/085 ,  H04H2201/70

    Abstract: An electronic information dissemination system electronically distributes information such as bulk mailed letters, bills, and other information from one or more sources to each of a plurality of remote stations located in homes or businesses. The system includes individually addressable receiver/decoders at each remote station. Each receiver/decoder has information processing and memory for identifying its distinct address plus a "global" address common to the plurality of remote stations in the system. Information is gathered from various sources at a centrally located data handling station which encodes the data for transmission to the remote stations. The transmission path is provided by an existing communications network such as CATV or a switched telephone system.

    Abstract translation: 电子信息传播系统将来自一个或多个来源的诸如批量邮寄信件，账单和其他信息的信息电子地分发到位于家庭或企业中的多个远程站中的每一个。 该系统包括每个远程站处的单独可寻址的接收器/解码器。 每个接收器/解码器具有用于识别其不同地址加上系统中多个远程站公用的“全局”地址的信息处理和存储器。 从位于中心位置的数据处理站的各种来源收集信息，该数据处理站对数据进行编码以传输到远程站。 传输路径由诸如CATV或交换电话系统的现有通信网络提供。

    Data communication system
    135.
    发明授权
    Data communication system 失效
    数据通信系统

    公开(公告)号：US4583090A

    公开(公告)日：1986-04-15

    申请号：US312367

    申请日：1981-10-16

    Applicant: Richard C. Eden ,  Ira Deyhimy ,  Timothy J. Quilici

    Inventor： Richard C. Eden ,  Ira Deyhimy ,  Timothy J. Quilici

    IPC: H04H20/34 ,  H04H60/13 ,  H04Q9/00

    CPC classification number: H04H20/34 ,  H04H60/13 ,  H04H2201/70 ,  Y10T307/25

    Abstract: A data communication system for general purposes having a new ternary carrier frequency shift keying (TCSK) signal. The system is applied to a utility load control by transmission of a sub-carrier of an FM broadcast channel. It is decoded by a receiver, SCA decoder, TCSK filter and a two level or binary converter and used to communicate to a pre-programmed microprocessor which enables various load control functions to be performed. The general system also is given for a QPSK (quadraphase shift keying) operating system.A data transmission filter is split between the transmitter and receiver and is operated in cascade to give individual interference filtering at each end of the transmission while also providing combined action and wave shaping. A high accuracy FM decoder using zero crossing detection enables data recovery with simple circuits. A novel random time load restoration circuit for ramp-up is disclosed. A fail safe relay operator is also disclosed.The TCSK employs a novel 19 character hex code format which is 8 bit microprocessor compatible and directly usable for other purposes such as ASCII message transmission. Both QPSK and TCSK systems offer command structures of variable length so as to permit truncation of message and reduce total message transmit time.

    Abstract translation: 一种用于通用目的的数据通信系统，具有新的三元载波频移键控（TCSK）信号。 该系统通过FM广播频道的子载波的发送应用于公用事业负载控制。 它由接收机，SCA解码器，TCSK滤波器和二电平或二进制转换器解码，用于与预编程的微处理器进行通信，从而实现各种负载控制功能。 一般系统也适用于QPSK（四通道移位键控）操作系统。 数据传输滤波器在发射机和接收机之间分离，并且级联操作，以在传输的每一端给出单独的干扰滤波，同时还提供组合动作和波形整形。 使用过零检测的高精度FM解码器能够利用简单的电路进行数据恢复。 公开了一种用于斜升的新颖的随机时间加载恢复电路。 还公开了一种故障安全继电器操作器。 TCSK采用了一种新颖的19字符十六进制码格式，与8位微处理器兼容，可直接用于其他目的，如ASCII消息传输。 QPSK和TCSK系统都提供可变长度的命令结构，以便允许消息的截断并减少总的消息发送时间。

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