RU2248675C1 - Speech signal transfer method - Google Patents

Abstract

FIELD: radio engineering.

SUBSTANCE: signal is divided on time intervals, and transfer of time intervals is performed along several data channels, while each time interval is transferred along separate channel, selected randomly.

EFFECT: higher efficiency.

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Description

The invention relates to communication technology and can be used to transmit a speech signal.

A known encoding method, including limiting the speech signal, differentiating, dividing the signal spectrum into a number of frequency bands, their subsequent transmission to the subscriber with the permutation of the frequency bands according to a random law (see AS USSR No. 501489, IPC ⁷ N 04 K 1/06, publ. 30.01.76 g.).

Closest to the claimed method is a method of encoding speech signals, which consists in dividing the speech signal into time intervals, dividing the obtained time intervals into a number of sub-intervals (see RF patent No. 2120700, IPC ⁷ N 04 K 1/06, publ. 20.10.1998 g .).

The disadvantages of the prototype are its complexity and the ability to receive the entire signal completely by an outside observer.

An object of the invention is to increase the degree of security of the transmitted signal from prying observers.

This technical problem is achieved by the fact that in the known method of transmitting a speech signal, including dividing the signal into time intervals, according to the invention, the transmission of time intervals is carried out on several communication channels, each of the time intervals being transmitted on a separate channel selected randomly.

This method will increase the degree of protection of the transmitted signal from outsiders.

The invention is illustrated by drawings, where Fig. 1 is a structural diagram of a device that implements the proposed method, Fig. 2 is a graph of a sent signal divided into time intervals, Figs. 3-6 are graphs of time intervals transmitted over communication channels, 7 is a graph of a received signal.

The structural diagram of the device that implements the method consists of a divider 1, switch 2, transmitters 3-6, receivers 7-10 and the adder 11.

An example of a specific implementation of the method.

The transmitted signal is fed to a divider 1, which divides it into time intervals t ₁ , t ₂ , t ₃ , t ₄ , t ₅ , t ₆ , t ₇ , t ₈ , etc., switch 2 distribute them on different channels in a random sequence, for example ACBDCADB, etc., is transmitted by transmitters 3-6, received by receivers 7-10, and summed by an adder 11.

The time intervals transmitted over the communication channels: A, B, C and D, are presented respectively in the graphs (see Fig.3-6).

The time interval t _{1 is} transmitted through channel A by a transmitter 3 operating at a frequency a (see FIG. 3); the time interval t _{2 is} transmitted on channel C by a transmitter 4 operating at a frequency c (see FIG. 4); the time interval t _{3 is} transmitted on channel B by a transmitter 5 operating at a frequency b (see FIG. 5); the time interval t _{4 is} transmitted on channel D by a transmitter 6 operating at a frequency d (see FIG. 6); the time interval t _{5 is} transmitted on channel C by a transmitter 4 operating at a frequency c (see FIG. 4); the time interval t _{6 is} transmitted on channel A by a transmitter 3 operating at a frequency a (see FIG. 5); the time interval t _{8 is} transmitted on channel B by a transmitter 5 operating at a frequency b (see FIG. 5); the time interval t _{8 is} transmitted on channel D by a transmitter 6 operating at a frequency d (see FIG. 6), etc.

The adder 11 summarizes the time intervals of the speech signal received by the receivers 7-10, obtaining a signal identical to the transmitted one (see Fig. 7).

Using the proposed method will allow, in comparison with the prototype, to increase the degree of security of the transmitted information from prying observers.

Claims (1)

A method of transmitting speech signals, including dividing the signal into time intervals, characterized in that the transmission of time intervals is carried out on several communication channels, each of the time intervals being transmitted on a separate channel selected randomly.

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