ecret telephony
    18.
    发明授权
    ecret telephony 失效
    恐惧电话

    公开(公告)号:US3967066A

    公开(公告)日:1976-06-29

    申请号:US41250441

    申请日:1941-09-24

    Inventor: MATHES ROBERT C

    CPC classification number: H04K1/02

    Abstract: 1. In a system of secret transmission of speech, means to subdivide speech waves constituting a message into a plurality of narrow frequency bands, means to integrate the energy in each band, means including a key for determining in successive time intervals a succession of indications unrelated to the speech being transmitted, and transmitting means controlled jointly by the integrated energy from each band and by said indications for transmitting a cipher from which to derive said speech message.

    Abstract translation: 在语音的秘密传输系统中,用于将构成消息的语音波细分成多个窄频带的装置,用于将每个频带中的能量进行积分的装置,包括用于在连续时间间隔内确定连续指示的装置的装置 与被发送的语音无关,以及由来自每个频带的综合能量共同控制的发送装置,以及用于发送用于导出所述语音消息的密码的所述指示。

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