Artificial cochlea method suitable for chinese voice coding pattern

Abstract

An artificial cochlea method suitable for Chinese speech encoding strategy includes such steps as high-pass filtering of speech signals for increasing the HF component in signals, dividing the frequency band of speech into several sub-bands, filtering without phase distortion to obtain the signals of each sub-band, and quasi-phase-locked stimulation distribution including over-zero detection, envelope extraction, non-linear dynamic range compression, and electric pulse distribution.

Description

technical field [0001] The invention belongs to the technical field of speech signal processing and relates to a cochlear implant, in particular to a cochlear implant method suitable for the Chinese speech coding strategy. Background technique [0002] In the information society, communication between people is becoming more and more important, but deaf people who have lost their hearing cannot use voice, a convenient and effective tool, to carry out normal interpersonal communication, let alone enjoy life such as enjoying music. pleasure. Helping the deaf to return to the sound world and enable them to live a normal life is a work of great social significance. For this goal, predecessors have carried out a lot of research work and explored some feasible methods and technologies, and cochlear implantation technology is a better method. [0003] The basic principle of a cochlear implant is to use an external speech processor instead of the cochlea to analyze the frequency o...

AI Technical Summary

Problems solved by technology

[0010] The use of cochlear implants can help deaf patients recover a certain degree of speech recognition ability, but the same type of cochlear implants imported from China, the effect is not as good as the foreign situation, showing that the correct rate of speech recognition is very low, and the speech intelligibility is reduced

The study found that foreign cochlear implant speech processing methods are all aimed at Western languages, represented by English; while our language is Chinese, which is different from Western languages. There are obvious differences between Mandarin Chinese and English in terms of acoustics and phonetics. Different, the most notable feature is that the change of the fundamental frequency of the vowel in Mandarin Chinese has a denotative effect, but the current cochlear implant technology cannot reflect the change of the fundamental frequency of speech

Although the cochlear implant technology used abroad has a better effect when speaking English, it also encounters great difficulties in listening to music and learning music

These cases all show that with current cochlear implant technology, the correct perception of the fundamental frequency is difficult

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