Data storage and transmission system
    2.
    发明授权
    Data storage and transmission system 失效
    数据存储和传输系统

    公开(公告)号:US3651471A

    公开(公告)日:1972-03-21

    申请号:US3651471D

    申请日:1970-03-02

    Applicant: NIELSEN A C CO

    CPC classification number: H04H60/43 H04H60/27 H04H60/32 H04H60/94 H04H2201/30

    Abstract: A system for economically monitoring via telephone a large number of remotely located television receivers or the like. Remotely located data handling systems check the status of receiver groups once every 30 seconds. Whenever a change in status is detected, the altered status is recorded as a ''''change line data set'''' in a continuously circulating memory which can store 40 such data sets. At periodic intervals a central unit

    Abstract translation: 一种用于通过电话经济监控大量远程位置的电视接收机等的系统。 远程定位的数据处理系统每30秒检查一次接收机组的状态。 每当检测到状态改变时,改变后的状态在连续循环的存储器中被记录为“改变行数据集”,其可以存储40个这样的数据集。 在周期性的间隔,中央单元通过电话与位于远程的数据处理系统接触。 数据组然后以调频音频的形式被重复发送到中央单元。 借助于每次循环存储器完全循环的反转标志位的标记位,中央单元能够从调制色调中提取40个数据集,并且还能检查传输错误。

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