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Echo cancellating and phonetic testing method and apparatus for dialogue interactive front end

A technology of echo cancellation and voice detection, which is applied in branch office voice amplifiers, monitoring/monitoring/testing arrangements, subscriber special services, etc. It can solve the problems of cutting off the beginning of the voice, no signal computing bus, and large noise energy, etc., to achieve detection The error rate is reduced, the elimination effect is good, and the voice is clean

Inactive Publication Date: 2004-04-21
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

This method has obvious limitations in the actual situation with noise because the energy of the noise itself may also be large
In addition, because there is no effective use of the signal calculation bus function, one channel (time slot) is used for recording and playback, and due to the switching delay from playback to recording, the recorded sound is often cut off at the beginning

Method used

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  • Echo cancellating and phonetic testing method and apparatus for dialogue interactive front end
  • Echo cancellating and phonetic testing method and apparatus for dialogue interactive front end
  • Echo cancellating and phonetic testing method and apparatus for dialogue interactive front end

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Embodiment Construction

[0050] specific implementation

[0051] Embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0052] see figure 1 , the present invention is in the voice interface part of a communicator system. The role of the sound interface part is to preprocess the voice, including echo cancellation and sound detection. Its ultimate purpose is to send clean speech through the communication hub to the speech recognizer. This solution can be implemented on a Dialogic card with a signal calculation bus, and of course it can also be implemented on any phone card that supports simultaneous recording and playback.

[0053] see figure 2 , the system should be initialized at the beginning, and it is in the state of waiting for dialing. Once the user dials the system, the sound processing unit should go off-hook and start recording, playback, echo canceller 2 and speech adaptive sound detector 3 at the same time. While rec...

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Abstract

The invention relates to an echo canceling and phonetic testing method and apparatus for dialogue interactive front end, comprising following steps: using the telephone card containing recording and playing channel as voice interface card as the communicator dialogue interactive front end and using two channels of the telephone card to eliminate echo to get clear voice residual data; then processing the voice signal self-adapting detecting step to the voice residual data, judging the type of the voice residual data; and stopping echo elimination step and closing playing channel when judging the voice residual data as voice. The invention applies the recording and playing channels of the common telephone card, combining with voice enhancement, voice identification and signal processing means, to achieve the echo real-time elimination and voice real-time detection for dialogue interactive function.

Description

technical field [0001] The present invention is a method and a device for realizing the echo cancellation and the voice detection of the front end of the dialogue and interaction of the communicator by utilizing the ordinary telephone card with the recording and playback channels. technical background [0002] Usually, refer to figure 1 , at the forefront of the communicator, a sound processor is needed to enhance and detect the voice. For example: cancel line echo and space echo; and detect whether the user is speaking and whether there is noise. How to realize echo cancellation and real-time detection and judgment of voice and noise in combination with the limited functions of the current general telephone card, the current system has not yet been able to solve it well. In a general communication machine, there are mainly modules such as voice interface, network interface, language generation, semantic analysis, dialogue management, credibility measurement, speech recogn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/62H04M3/22H04M3/42
Inventor 张建平颜永红潘接林韩疆刘建
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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