Evaluation system for Chinese tone coding strategy of artificial cochlea

A cochlear implant and evaluation system technology, applied in the field of artificial vision and hearing, can solve the problems of reducing the value of digital simulation, restricting the development of new Chinese speech coding algorithms, lack of functional simulation of auditory nerve pathways, etc., to achieve the effect of simple and efficient inspection

Active Publication Date: 2020-05-15
重庆大学科技园有限责任公司
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AI Technical Summary

Problems solved by technology

However, since the current mathematical model of the auditory neural pathway mainly simulates the function of the peripheral auditory pathway, it lacks the functional simulation of the auditory neural pathway at the central level, which reduces the value of digital simulation.
[0008] The above problems have limited the development of new Chinese speech coding algorithms

Method used

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  • Evaluation system for Chinese tone coding strategy of artificial cochlea
  • Evaluation system for Chinese tone coding strategy of artificial cochlea
  • Evaluation system for Chinese tone coding strategy of artificial cochlea

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see Figure 1 to Figure 4 , an evaluation system for cochlear implant Chinese speech coding strategy, mainly including speech signal acquisition module 1, fundamental frequency detection module 2, signal preprocessing module 3, frequency channel division module 4, harmonic selection module 5, frequency shift processing module 6, filter Module 7, speech synthesis module 8, speech playback module 9 and input controller 10 for controlling other modules.

[0052] see image 3 , the evaluation system of cochlear implant Chinese speech coding strategy is integrated as the host of the evaluation system.

[0053] The voice signal collection module 1 collects an external voice signal s(t), and sends it to the fundamental frequency detection module 2 and the signal preprocessing module 3 .

[0054] The voice signal acquisition module 1 has a microphone 101 .

[0055] The external speech signal s(t) is Chinese speech, including 24 syllables formed by Lin's six tones and four Ch...

Embodiment 2

[0087] see figure 2 , an evaluation system for cochlear implant Chinese speech coding strategy, mainly including speech signal acquisition module 1, fundamental frequency detection module 2, signal preprocessing module 3, frequency channel division module 4, harmonic selection module 5, frequency shift processing module 6, filter Module 7, speech synthesis module 8 and speech playback module 9.

[0088] The main steps of the experiment to verify the evaluation system of the cochlear implant Chinese speech coding strategy are as follows:

[0089] 1) conventional voice signal preprocessing and frequency channels are divided as follows in the frequency channel division module 4:

[0090] Generally, most of the power of the speech signal is concentrated at the low frequency end, and the signal-to-noise ratio at the high frequency end will be relatively low. Compensation for the high frequency band is accomplished using a first-order Butterworth high-pass filter with a cutoff fr...

Embodiment 3

[0112] An experiment to verify the correct rate of tone recognition of the evaluation system of cochlear implant Chinese speech coding strategy, mainly as follows:

[0113] The hearing-impaired subjects and the hearing-impaired subjects were contacted to conduct a statistical test on the correct rate of tone recognition. The entire test was carried out in a quiet soundproof room, and each subject was tested individually. Use the vocoder to synthesize the sound encoded by the Chinese speech strategy to be detected, that is, select a group of sinusoidal signals as the modulation signal, and use the center frequency f of each channel c As the modulation frequency, the modulated channel signals are accumulated, and the output signal y(t) is the coded signal after vocode synthesis. The effect of the Chinese speech coding strategy used was tested by listening to acoustic simulations of healthy subjects.

[0114]

[0115] Match the original Lin's six tones with four tones to obt...

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Abstract

The invention discloses an evaluation system for a Chinese speech coding strategy of an artificial cochlea. A main hardware system comprises a speech signal acquisition module, a fundamental frequencydetection module, a signal preprocessing module, a frequency channel division module, a harmonic selection module, a frequency shift processing module, a filtering module, a speech synthesis module and a playing module. According to the invention, by adoption of Lin's six tones as a basic speech material and cooperation of four tones, the Lin's six tones are processed by using a to-be-tested Chinese speech coding strategy and played to a subject, so the hearing task of tone recognition is completed, and the correct rate of tone recognition is counted to evaluate the advantages and disadvantages of the to-be-tested Chinese speech coding strategy. Compared with a traditional speech test library, the evaluation system provided by the invention has less test content; and the evaluation systemis short in detection time, high in relative detection efficiency and low in cost, and can improve the treatment experience of the subject, inspect a Chinese speech coding algorithm and train and detect the tone recognition ability of hearing-impaired children.

Description

technical field [0001] The invention relates to the field of artificial audiovisual technology, in particular to an evaluation system for Chinese tone coding strategies of cochlear implants. Background technique [0002] Hearing impairment, whether congenital or acquired, will cause great trouble to the normal life of the patient, and may even affect the patient's language function. As of 2013, the World Health Organization statistics show that there are about 360 million disabled persons with hearing and speech impairments in the world, of which 27.8 million are in my country, which is the country with the most hearing disabilities in the world. Hearing impairment can be roughly divided into three categories: conductive deafness, sensorineural deafness and mixed deafness. Patients with sensorineural deafness and mixed deafness can wear cochlear implants (Cochlear Implants, CI) to obtain partial hearing, communicate with others, and improve the quality of life. [0003] Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/36
CPCA61N1/36038
Inventor 王星汪钰欣徐志玲杨雨心王广成陈涛段言周嘉雯
Owner 重庆大学科技园有限责任公司
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