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Method and device for transmitting voices in party-line telephone system

A co-line telephone and voice technology, applied in the field of communication, can solve problems such as unusable, unattainable echo attenuation, poor user experience, etc.

Inactive Publication Date: 2017-01-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is basically impossible for 32 users to use 30-level mixing, because after verification, it is found that after the general mixing equipment has been mixed above 10, the delay and echo are very obvious, and the echo attenuation cannot even reach -20dB , basically unusable, poor user experience

Method used

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  • Method and device for transmitting voices in party-line telephone system
  • Method and device for transmitting voices in party-line telephone system
  • Method and device for transmitting voices in party-line telephone system

Examples

Experimental program
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Effect test

example 1

[0185] The speech transmission method of example 1 comprises the following steps:

[0186] S101, allocating exclusive line time slot resources for users participating in the co-line group at each site;

[0187] Since all user signals participating in the co-line telephone are relayed and transmitted in the same group of chain E1s, the users of each station exclusively occupy a certain fixed time slot resource in this group of E1s.

[0188] S102. Send the coded speech signal of the node to the line according to the time slot resource allocated by the node;

[0189] For the first station node and the intermediate station node, the speech coded signal of the user at this station is connected to the corresponding time slot of the downlink E1;

[0190] For the tail station node, connect the speech coded signal of the user at this station to the corresponding time slot of the uplink E1;

[0191] S103. Determine whether to forward the received speech coded signal according to the p...

example 2

[0205] The speech transmission method of example 2 comprises the following steps:

[0206] S101, allocating exclusive line time slot resources for users participating in the co-line group at each site;

[0207] Since all user signals participating in the co-line telephone are relayed and transmitted in the same group of chain E1s, the users of each station exclusively occupy a certain fixed time slot resource in this group of E1s.

[0208] S102. Send the coded speech signal of the node to the line according to the time slot resource allocated by the node;

[0209] For the first station node, connect the speech coding signal of this station to the corresponding time slot of downlink E1;

[0210] For the intermediate station node, connect the speech coding signal of this station to the corresponding time slots of uplink E1 and downlink E1;

[0211] For the tail station node, connect the speech coding signal of this station to the corresponding time slot of the uplink E1;

[0...

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Abstract

The invention discloses a method for transmitting voices in a party-line telephone system. The method is applied to a node in a chain network. The method comprises the steps of coding a voice signal of a node user, and sending the voice coding signal of the node user to a line; determining whether to forward the voice coding signal received from the line or not according to a location of the node in the chain network; and mixing the voice coding signals of other node users received from the line, decoding the mixed signals and sending the signals to the node user. According to the method and the device, chain networking and single-level mixing of the party-line telephone system are realized, the voice quality of the party-line telephone system can be improved, and the reliability is ensured. The invention also discloses a device for transmitting voices in the party-line telephone system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for transmitting voice in a shared telephone system. Background technique [0002] Co-line telephone is a kind of telephone service commonly used in railway private network, mainly used for various traffic dispatching, etc. Its basic features are: the voice signals of the dispatching station and multiple dispatching stations are mixed into one teleconference, and the communication between each other It can be heard at any time, that is to say, it is necessary to realize the superposition of multiple channels of audio. Therefore, when traditional railway equipment is implemented, this function is implemented within a 64K time slot bandwidth. In a common-line telephone system, all the extensions belonging to the common-line group are scattered on multiple site equipments. In order to ensure the safety of railway operation, the audio superimposition functi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M3/56G10L19/008
CPCH04M7/00
Inventor 韩淑玲颜晓庆徐劲松孙正旻
Owner ZTE CORP
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