CN1861025A - Language processing device for artificial cochlea - Google Patents
Language processing device for artificial cochlea Download PDFInfo
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- CN1861025A CN1861025A CNA2006100275334A CN200610027533A CN1861025A CN 1861025 A CN1861025 A CN 1861025A CN A2006100275334 A CNA2006100275334 A CN A2006100275334A CN 200610027533 A CN200610027533 A CN 200610027533A CN 1861025 A CN1861025 A CN 1861025A
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Abstract
A speech processor for artificial cochlea is composed of a speech amplifier module for amplifying and filtering the speech signals coming from microphone, a digital signal processing module with DSP chip for A/D conversion, time-frequency analysis and digital encoding, an RF transmitter module, display control module, and power supply module.
Description
Technical field
The present invention relates to a kind of artificial cochlea device, relate in particular to the speech processor of this artificial cochlea device.
Background technology
People's ear can be divided into external ear, middle ear and internal ear three parts.The main effect of external ear and middle ear be with external sound by tympanum and with it in succession 3 auditory ossicles conduct to internal ear.Internal ear is the Semen Glycines size approximately, and the likeness in form Crusta Limax claims cochlea again.Several ten thousand auditory perception cells---hair cell is arranged in the cochlea, and hair cell will convert electrochemical energy to from the acoustic energy (mechanical energy) that middle ear transmit and cause acous excitement, and the acoustic nerve excitement conducts to acoustic information cerebral cortex and produces audition with the form of electricity.Because the deafness that the inner ear hair cells pathological changes causes is a sensorineural deafness, does not still have effective Therapeutic Method at present.For in, the severe sensorineural deafness, the existing sonifer voice emplifying that adopts usually improves one's hearing.But then do not help much for the anacusia patient that does not have residual hearing.Studies show that the pathological changes of most anacusia patients mainly is positioned at the hair cell of internal ear, and mostly acoustic nerve is intact.
Artificial cochlea device is implanted into device two parts by speech processor (device outside) and body and forms.Its operation principle is to utilize the acoustic-electric transducer mount to replace the hair cell of loss of function in deaf person's cochlea, directly stimulates auditory nerve to make the deaf person produce audition.The signal transmission that speech processor and body are implanted between the device is finished by electromagnetic induction, is separated by for skin between the two, does not have lead to connect.
In whole artificial cochlea device, the speech processor is conclusive, and whole system scheme and speech processes strategy are based on all that the speech processor realizes.
Total in the market external three-type-person worker's cochlea product, its speech processor all is based on the asic chip design, and function is fixed, and language processing strategy is single, carries out relatively difficulty of software upgrading.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of language processing device for artificial cochlea, are intended to solve above-mentioned defective.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: voice amplification module, digital signal processing module, radio frequency sending module, display control module, power module; The external microphone collected sound signal also is converted to the signal of telecommunication and is sent to the voice amplification module through lead, and the voice amplification module will amplify by voice, Filtering Processing, and the voice signal after the amplification inputs to digital signal processing module through first adapter; Digital signal processing module is converted to analog voice signal audio digital signals by A/D converter and carries out time frequency analysis, digital coding after the 4th adapter is given the radio frequency sending module; Voice signal after the radio frequency sending module will be encoded is launched; Display control module links to each other with digital signal processing module by the 3rd adapter; Power module links to each other respectively with voice amplification module, digital signal processing module, radio frequency sending module, display control module; Described digital signal processing module comprises dsp chip.
Compared with prior art, the invention has the beneficial effects as follows: can carry out software upgrading along with the improvement of language processing strategy, can also be easy to increase new function according to specific apply changes program.
Description of drawings
Fig. 1 is a prior art language processing device for artificial cochlea module map;
Fig. 2 is digital signal processing module figure among the present invention;
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
As seen from Figure 1: the present invention includes: voice amplification module, digital signal processing module, radio frequency sending module, display control module, power module; The external microphone collected sound signal also is converted to the signal of telecommunication and is sent to the voice amplification module through lead, and the voice amplification module will amplify by voice, Filtering Processing, and the voice signal after the amplification inputs to digital signal processing module through the first adapter J1; Digital signal processing module is converted to audio digital signals with analog voice signal by A/D converter and carries out time frequency analysis, digital coding after the 4th adapter J4 gives the radio frequency sending module; Voice signal after the radio frequency sending module will be encoded is launched; Display control module links to each other with digital signal processing module by the 3rd adapter J3; Power module links to each other respectively with voice amplification module, digital signal processing module, radio frequency sending module, display control module; Described digital signal processing module comprises dsp chip.
The external microphone collected sound signal also is converted to the signal of telecommunication, is sent to the voice amplification module through lead then, and the voice amplification module carries out voice amplification, Filtering Processing, and the voice signal after the amplification is given the digital signal processing module of back through the first adapter J1.Digital signal processing module is the core of whole speech processor, it at first carries out the A/D conversion, analog voice signal is converted to the audio digital signals of being convenient to handle, carry out time frequency analysis, digital coding then, form at last and send signal, give the radio frequency sending module through the 4th adapter J4, the voice signal after the radio frequency sending module will be encoded by the mode of radio communication is launched.Display control module is mainly finished volume, switching on and shutting down by key control and liquid crystal display, and it is connected by the 3rd adapter J3 with digital signal processing module.Power module is responsible for providing DC voltage to each module, comprise+5V ,+3.3V and 1.8V.
As seen from Figure 2: the voice signal after the amplification is sent into through the first adapter J1, isolate amplification through amplifier U1, send into the conversion chip U2 of back, first resistance R 1, the 4th resistance R 4 are adjusted resistance for amplification, the 5th resistance R 5, the 6th resistance R 6 are adjusted dc point, 7 metering functions of the 7th resistance R.U2 is a slice A/D conversion chip, finish the conversion of analogue signal to digital signal, and give dsp chip U4 with digitized voice signal, U4 is a slice Digital Signal Processing large scale integrated circuit, finish time frequency analysis, the coding of audio digital signals and send control, the program software of U4 leaves among the non-volatile FLASH device U5, and program can import among the U4 automatically and move when powering on.U3 is a frequency dividing circuit, and X1 is the crystal oscillating circuit of U4, for the U4 operation provides clock signal.First capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5 are filter capacitors, and second resistance R 2, the 3rd resistance R 3, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10 are pull-up resistors.Voice signal behind the coding is given the radio frequency sending module by the 4th adapter J4, and the 3rd adapter J3 is used for connecting display control module, and the second adapter J2 connects power module, and the 5th adapter J5 provides debugging interface for U4.
The present invention adopts the structural design based on Digital Signal Processing (DSP), after digitized voice signal is sent into DSP, carries out time frequency analysis, extracts language spectrum signature value, the transmission of encoding then.U4 is a dsp chip, and it is the core of whole system, and DSP reads speech data by serial ports, carries out work such as Filtering Processing, eigenvalue extraction, coding transmission and parameter setting, parameter preservation, program upgrade, algorithm improvement.U4 selects the general dsp chip TMS320VC5402 of American TI Company for use, and it has characteristics such as low in energy consumption, that speed is fast, and arithmetic speed is up to 100MIPS, and contains abundant external interface and internal RAM, FLASH space, is fit to very much voice signal and handles.Language processing strategy is the key technology of speech processor, selected SPEAK strategy coding in the present invention, voice spectrum is divided by the stimulation channels number, spectrum division is followed the LINE-LOG method, be that low frequency is divided by linearity, high frequency is pressed loaarithmic curve and is divided, and meets the physiology principle of cochlea like this.DSP has the programming flexible characteristic, can carry out software upgrading along with the improvement of language processing strategy, can also be easy to increase new function according to specific apply changes program.Adopt non-volatile FLASH device U5 among the present invention, be used for storage program and MAP parameter etc.Voice signal is after DSP finishes dealing with, and the data that will contain encoding information by the J4 interface send to the radio frequency sending module.
Characteristics of the present invention are:
● the voice signal high-speed processing technology: the 16bit digitized sampling, undistorted dynamic range greater than 60dB, the voice signal high-fidelity; Frequency response characteristic (150Hz～8KHz);
● verbal coding strategy: adopt the SPEAK language processing strategy;
● the MAP regulatory function: the electrode stimulating flexible setting for parameters, download simply, make things convenient for speech therapy and individual character Change treatment;
● electrode stimulating safety: the maximum current limit function, effectively protect cochlear tissue;
● have the outside line input interface, the convenient outer audio equipments such as mp3, videocorder, phone that connect;
● liquid crystal display volume, application model, amount of batteries, button add/released state, have to automatically shut down/arousal function;
● power supply: use No. 5 rechargeable batteries of 2 joints, the convenient use, low power dissipation design, continuous operation was greater than 10 hours.
Claims (1)
1. a language processing device for artificial cochlea comprises: voice amplification module, digital signal processing module, radio frequency sending module, display control module, power module; It is characterized in that: the external microphone collected sound signal also is converted to the signal of telecommunication and is sent to the voice amplification module through lead, the voice amplification module will amplify by voice, Filtering Processing, and the voice signal after the amplification inputs to digital signal processing module through first adapter; Digital signal processing module is converted to analog voice signal audio digital signals by A/D converter and carries out time frequency analysis, digital coding after the 4th adapter is given the radio frequency sending module; Voice signal after the radio frequency sending module will be encoded is launched; Display control module links to each other with digital signal processing module by the 3rd adapter; Power module links to each other respectively with voice amplification module, digital signal processing module, radio frequency sending module, display control module; Described digital signal processing module comprises dsp chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100275334A CN1861025A (en) | 2006-06-09 | 2006-06-09 | Language processing device for artificial cochlea |
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| CNA2006100275334A CN1861025A (en) | 2006-06-09 | 2006-06-09 | Language processing device for artificial cochlea |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105434084A (en) * | 2015-12-11 | 2016-03-30 | 深圳大学 | Mobile equipment, extracorporeal machine, artificial cochlea system and speech processing method |
| CN105700407A (en) * | 2016-04-25 | 2016-06-22 | 陈丽 | Sound signal acquisition and processing device |
| CN105999546A (en) * | 2016-06-24 | 2016-10-12 | 沈阳弘鼎康医疗器械有限公司 | Artificial cochlea ad sound processing method thereof |
| CN109248376A (en) * | 2018-08-24 | 2019-01-22 | 上海华聆人工耳医疗科技有限公司 | A kind of artificial cochlea's radio frequency data transmission method |
| CN109979477A (en) * | 2019-03-12 | 2019-07-05 | 上海力声特医学科技有限公司 | The sound processing method of artificial cochlea |
-
2006
- 2006-06-09 CN CNA2006100275334A patent/CN1861025A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105434084A (en) * | 2015-12-11 | 2016-03-30 | 深圳大学 | Mobile equipment, extracorporeal machine, artificial cochlea system and speech processing method |
| CN105700407A (en) * | 2016-04-25 | 2016-06-22 | 陈丽 | Sound signal acquisition and processing device |
| CN105999546A (en) * | 2016-06-24 | 2016-10-12 | 沈阳弘鼎康医疗器械有限公司 | Artificial cochlea ad sound processing method thereof |
| CN109248376A (en) * | 2018-08-24 | 2019-01-22 | 上海华聆人工耳医疗科技有限公司 | A kind of artificial cochlea's radio frequency data transmission method |
| CN109979477A (en) * | 2019-03-12 | 2019-07-05 | 上海力声特医学科技有限公司 | The sound processing method of artificial cochlea |
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