Radio paging system with voice transfer function and radio pager
    3.
    发明授权
    Radio paging system with voice transfer function and radio pager 失效
    具有语音传输功能的无线寻呼系统和无线寻呼机

    公开(公告)号:US5412719A

    公开(公告)日:1995-05-02

    申请号:US5315

    申请日:1993-01-15

    摘要: A radio paging system with voice transfer function for transmitting a voice message input from an ordinary push-button telephone set to a small-sized receive-only unsophisticated radio pager. A paging station is provided to transmit by radio the message from a telephone network to the radio pager as follows: voice information constituting the message is first converted from analog to digital format, compressed, stored in memory, and scrambled by a privacy function part for transmission. The radio pager in turn demodulates the received information, stores it in memory, retrieves a necessary message therefrom as designated, descrambles the designated message from scrambled state, expands the message from compressed state, and outputs the message as an audible output. In this manner, the user carrying the radio pager is able to get the message from the caller without the risk of being tapped by a third party.

    摘要翻译: 一种具有语音传输功能的无线寻呼系统,用于将从普通按钮式电话机输入的语音消息发送到小型仅接收非专用无线寻呼机。 提供寻呼站,通过无线电将消息从电话网络传送到无线寻呼机,如下:构成消息的语音信息首先从模拟数字格式转换,压缩,存储在存储器中,并由隐私功能部分加扰 传输。 无线寻呼机依次对接收到的信息进行解调,将其存储在存储器中,按指定的方式从中取出必要的消息,从指定的消息中解扰,从扩展状态扩展消息,并将消息作为声音输出输出。 以这种方式,携带无线寻呼机的用户能够从呼叫者获得消息,而不会被第三方窃听。