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Full-duplex audio communication terminal

A technology of audio communication and communication terminal, which is applied in the direction of telephone communication, line transmission components, electrical components, etc., and can solve the problems of destroying full-duplex communication mode and attenuation of useful content

Active Publication Date: 2014-12-03
ST ERICSSON FRANCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But while there is such useful content at the same time that the signal is received by the terminal, this useful content is also attenuated, which defeats the purpose of the full-duplex communication mode

Method used

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  • Full-duplex audio communication terminal
  • Full-duplex audio communication terminal
  • Full-duplex audio communication terminal

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Embodiment Construction

[0042] In these drawings, the same reference numerals or symbols have the same meaning when they are used repeatedly in different drawings.

[0043] The present invention can be used inside two mobile phone terminals 100 and 200, such as figure 1 shown. The user 101 of the terminal 100 and the user 201 of the terminal 200 are at a distance from each other such that the terminal 100 and the terminal 200 can be designated as a local terminal and a remote terminal with respect to each other. Arrow 300 represents a full-duplex wireless communication link for an ongoing audio communication session.

[0044] Such as figure 2 As shown, the terminal 100 comprises a signal receiving channel R terminating in a receiver 10, labeled RECEPT. The structure of such receive channels is considered known and is not described here. The signal reception channel R comprises a detector 1 which generates a reception detection signal. This signal indicates whether the signal R is actually recei...

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Abstract

A full duplex audio communication terminal (100) comprises a noise attenuation module (4) arranged on a transmission path of the terminal. The noise attenuation module comprises two activation thresholds, which are respectively intended to be adjusted above a noise level and above an echo level of transmission signals (TC) produced by the terminal. The first or the second activation threshold is selected as a function of the detection of signals (R) received by said terminal. An improvement to the suppression in the transmission signals of echoes from received signals is thus obtained which is compatible with the principle of full duplex communication. Preferably, the noise attenuation module processes transmission signals which are produced by an echo compensator (2). Residual echo still present in the transmission signals already processed by the echo compensator is thus further reduced.

Description

technical field [0001] The present invention relates to a communication terminal capable of transmitting and receiving audio signals in a full-duplex communication mode. The invention also relates to a method of transmitting audio signals using a full-duplex communication mode. Background technique [0002] In full-duplex communication mode, two terminals can exchange communication signals simultaneously, eg, between a local terminal and a remote terminal. That is, communication signals can be transmitted from the local terminal to the remote terminal while other communication signals are transmitted in the other direction from the remote terminal to the local terminal. [0003] When the communication signal is an audio signal, the signal received by each terminal is converted by the terminal into audio information through a speaker. When a terminal's microphone receives speech or sound, it converts the speech or sound into a communication signal that is transmitted by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/06H04M9/08
CPCH04M9/082
Inventor 莱昂内尔·西马
Owner ST ERICSSON FRANCE
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