A Foreign Language Oral Correction System

Abstract

The invention discloses a spoken foreign language correction system. The system comprises an audio acquisition circuit, a feedback differential circuit and a push-pull output circuit. The audio acquisition circuit uses an audio collector with the model of AIC3104 to acquire an audio signal of a user. The feedback differential circuit is divided into two paths to receive output signals of the audioacquisition circuit; in one path, an operational amplifier AR2, an operational amplifier AR3 and diodes D2-D4 are used for forming a peak value circuit to screen out a peak value signal; in the second path, an operational amplifier AR4 and a diode D6 are used for forming a rectifying circuit to rectify signals; finally, two paths of signals are input into a triode Q1, a triode Q2 and resistors R10-R13 to form a differential circuit. Signals are input into the push-pull output circuit after being subjected to differential processing, and finally the push-pull output circuit uses a triode Q4 and a triode Q5 to form the push-pull circuit to prevent signal crossover distortion, the signals in the voice of a control terminal can be corrected, so that noise in audio signals can be effectively filtered out , and meanwhile, the anti-interference performance of the signals is improved.

Description

Technical field [0001] The present invention relates to the field of circuit technology, and more particularly to a foreign language port correction system. Background technique [0002] At present, foreign language oral correction systems mainly include voice acquisition modules, speech recognition modules, voice correction modules and recording devices, control terminals, the speech acquisition module collects user foreign language pronunciation, the speech recognition module identifies recording, and will record and standard sound comparing a control terminal receiving a voice acquisition module output signal, and a voice recognition module and a recording control means, said recording means in accordance with stored user learn burn cycle of a typical recording each stage, the spoken audio signal is corrected with the standard pronunciation Comparison, thus pronounced the user's spoken language, and the audio signal acquisition will often have noise, or the pronunciation is un...

AI Technical Summary

Problems solved by technology

[0002] At present, the foreign language oral correction system mainly includes a voice acquisition module, a voice recognition module, a voice correction module, a recording device, and a control terminal. For comparison, the control terminal receives the output signal of the voice acquisition module, and controls the voice recognition module and the recording device. The recording device burns the typical recordings of each stage according to the user's learning stage for storage, and the spoken language correction is based on the audio signal and the standard voice. comparison, so as to correct the pronunciation of the user's spoken language. However, noises or unclear pronunciation often appear during the audio signal collection process, resulting in unrecognizable or large errors during the comparison and correction, which seriously affects the correction effect of foreign language spoken language.

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