Speech signal processor for cochlear implant based on dual core processor

Abstract

The invention discloses a speech signal processor for a cochlear implant based on a dual core processor, belonging to the technical field of cochlear implantation, which is characterized by comprising a core processor unit, an audio unit, a radio transmission unit, a storage unit and a power management unit, wherein the core processor unit comprises DSP+ARM low power consumption dual core processor OMAP-L137 and a protective circuit; the audio unit consists of an audio coder decoder, a front-end voice acquisition interface connected with a microphone and a rear-end headset output interface; the radio transmission unit consists of a baseband signal generation circuit, an amplification and a filter circuit, a modulation circuit and a power amplification circuit; the storage unit is composed of an NAND Flash circuit, an SDRAM circuit and a Micro SD card circuit; and the power management unit is composed of double throw switch, a diode, a fuse, an external power input interface of +5V, an external lithium battery input interface of +4.2V, a main power management circuit, a first voltage conversion circuit and a second voltage conversion circuit so as to satisfy requirements of all parts of a system.

Description

technical field [0001] The invention belongs to the technical field of electronics, computer and signal processing, and particularly relates to an external voice processor device in electronic cochlear implantation. Background technique [0002] The human hearing system includes the outer ear, middle ear, inner ear, auditory nervous system and the language center of the cerebral cortex. Studies have shown that the lesions of most total deaf patients are mainly located in the hair cells of the inner ear. Hair cells are the receptors of hearing, which combine with the basilar membrane to convert the mechanical vibration of sound into nerve firing, which is transmitted to the brain. Hair cell damage or congenital hypoplasia will cause the sound transmission pathway to be interrupted in the cochlea, and the sound information cannot be converted into nerve firing information and transmitted to the language center of the cerebral cortex, causing the patient to lose hearing. But ...

AI Technical Summary

Problems solved by technology

However, this patent integrates voice collection, processing, stimulation circuit and stimulation electrodes, and it is not easy to remove after implantation. It is difficult to replace the battery and modify the voice processing program. practical needs

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