CN104093111A - Digital hearing aid with Chinese tone enhancing method - Google Patents
Digital hearing aid with Chinese tone enhancing method Download PDFInfo
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- CN104093111A CN104093111A CN201410112960.7A CN201410112960A CN104093111A CN 104093111 A CN104093111 A CN 104093111A CN 201410112960 A CN201410112960 A CN 201410112960A CN 104093111 A CN104093111 A CN 104093111A
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Abstract
The invention discloses a digital hearing aid with a Chinese tone enhancing method. The hearing aid includes an audio receiving device, an A/D converter, a framing device, a vowel endpoint detector, a parameter extractor, a tone enhancer, a synthesizer, a hearing aid algorithm unit, a D/A converter and an audio output device. The A/D converter is connected with the audio receiving device. The framing device is connected with the A/D converter. The parameter extractor is connected with the framing device. The tone enhancer is connected with the parameter extractor. The synthesizer is connected with the tone enhancer. The hearing aid algorithm unit is connected with the synthesizer. The D/A converter is connected with the hearing aid algorithm unit. The audio output device is connected with the D/A converter. The vowel endpoint detector is connected between the framing device and the parameter extractor.
Description
Technical field
Chinese tones Enhancement Method of the present invention belongs to audio digital signals processing technology field, and it carries out corresponding Digital Signal Processing for the feature of Chinese tone voice to Chinese tone, is applicable to digital hearing aids.
Background technology
The directly the most easy interference method of hearing loss is worn hearing aids exactly.An important consequence of Sensorineural hearing loss is the reduction that can bring sense of hearing dynamic range.The hearing aids that has possessed modern digital compress technique can be by the sense of hearing dynamic range compression of the full threshold of audibility to limited listening in the audibility range of damaging patient.But the shortcoming of this method is, compression algorithm can weaken the amplitude difference of voice signal, and the loss of sort signal amplitude information can make the intelligibility of voice signal decline, and causes and listens barrier patient more not hear.
The main key technology of digital deaf-aid is still mainly held by various countries, west at present, and its signal processing method is mainly west User Exploitation, and not in full conformity with Chinese feature.Affected to a certain extent the hearing aid effect of hearing aids.Some hearing aids of having developed tone Enhancement Method, after having determined vowel end, strengthens Chinese effect by the method that changes gain.But the effect of the change of this gain can the weakening partly of compressed algorithm.
Chinese is a kind of tone language, and sound is identical but word that tone is different is a lot.Mandarin medial vowel part forms four kinds of distinctive tones by the change of pitch period.Experimental results show that.The tone feature of strengthening Chinese signal is conducive to improve the resolution of Chinese speech.
Summary of the invention
The object of the invention is to design a kind of digital deaf-aid with Chinese tones Enhancement Method.
The present invention will solve is that existing modern digital hearing aids be take the present situation that the pronunciation character of west Romance studies as basis mostly, does not meet the problem of Chinese sounding characteristic.
Technical scheme of the present invention is: it comprises apparatus for receiving audio, A/D converter, divide frame device, vowel end point detector, parameter extractor, tone intensifier, synthesizer, hearing aid algorithms unit, D/A converter and audio output device, described A/D converter is connected with apparatus for receiving audio, a described minute frame device is connected with A/D converter, described parameter extractor is connected with a minute frame device, described tone intensifier is connected with parameter extractor, described synthesizer is connected with tone intensifier, described hearing aid algorithms unit is connected with synthesizer, described D/A converter is connected with hearing aid algorithms unit, described audio output device is connected with D/A converter, between described minute frame device and parameter extractor, be connected with vowel end point detector.
An Enhancement Method with the digital deaf-aid of Chinese tones Enhancement Method, is characterized in that comprising the steps:
A) contain an apparatus for receiving audio for receiving acoustical signal;
B) contain A/D converter, be connected with apparatus for receiving audio, the acoustical signal that step a apparatus for receiving audio is received is converted into time-domain digital input signal;
C) contain one minute frame device, be connected with A/D converter, the time-domain digital input signal in step b is carried out to temporal minute frame, obtain a minute frame signal;
Whether d) contain monobasic voice endpoint detector, be connected with a minute frame device, be the judgement of vowel to minute frame signal obtaining in step c; If during vowel, carry out follow-up step; If not during vowel, do not carry out follow-up step;
E) contain a parameter extractor, be connected with a minute frame device, minute frame signal that step c is obtained is analyzed, and obtains pitch period and parameter.
F) contain a tone intensifier, be connected with parameter extractor, the pitch period of the speech frame signal obtaining in step e is strengthened, obtain new pitch period.
G) contain a synthesizer, be connected with tone intensifier, the parameter in the new pitch period obtaining and step e is synthesized to the voice output being strengthened after tone in step f.
H) contain a hearing aid algorithms unit, be connected with synthesizer, to the voice output being strengthened in step g after tone, calculate the signal after compensation.
I) contain a D/A converter, be connected with hearing aid algorithms unit, the signal calculating after compensation in step h is converted into acoustical signal, then by an audio output device, export.
Within described minute, frame device is divided into overlapping or nonoverlapping minute frame signal by time-domain digital input signal.
The course of work of described vowel end point detector is: whether vowel end point detector is that vowel judges to minute frame signal of input.Only, when a minute frame signal is judged as vowel, carry out follow-up computing.
Described parameter extractor has adopted the technology of phonetic synthesis, by the method for pitch synchronous analysis, from minute frame signal, extracts pitch period.
Described tone intensifier, according to the Changing Pattern of pitch period, by expanding the method for difference on the frequency, calculates the new pitch period after enhancing.
Described synthesizer has also used the technology of phonetic synthesis, utilizes new pitch period and other parameters, generates the voice output after strengthening tone.
Described hearing aid algorithms unit, has been used to test and has joined the definite gain of formula, the voice output after the strengthening tone receiving is amplified to the signal after being compensated.。
Beneficial effect of the present invention is: the present invention is by amplifying the variation of pitch period, and then the tone feature of amplification voice, this algorithmic technique is applied to digital deaf-aid, can effectively improve the discrimination of user's Chinese speech, make user's centering literary composition obtain good hearing aid effect.The present invention looks for another way, according to the speech intonation feature of Chinese mandarin, propose a kind of Chinese tone Enhancement Method for digital deaf-aid, with the chip of digital deaf-aid inside, Chinese tone signal is strengthened, thereby improve to listen, damage the discrimination of patient to Chinese speech.
Accompanying drawing explanation
Fig. 1 is the signal flow block diagram that the present invention adopts.
Fig. 2 is the tone contrast before and after pitch period of the present invention is adjusted.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in the figure, the present invention includes and comprise apparatus for receiving audio 1, A/D converter 2, divide frame device 3, vowel end point detector 10, parameter extractor 4, tone intensifier 5, synthesizer 6, hearing aid algorithms unit 7, D/A converter 8 and audio output device 9, described A/D converter 2 is connected with apparatus for receiving audio 1, a described minute frame device 3 is connected with A/D converter 2, described parameter extractor 4 is connected with a minute frame device 3, described tone intensifier 5 is connected with parameter extractor 4, described synthesizer 6 is connected with tone intensifier 5, described hearing aid algorithms unit 7 is connected with synthesizer 6, described D/A converter 8 is connected with hearing aid algorithms unit 7, described audio output device 9 is connected with D/A converter 8, between described minute frame device 3 and parameter extractor 4, be connected with vowel end point detector 10.
An Enhancement Method with the digital deaf-aid of Chinese tones Enhancement Method, is characterized in that comprising the steps:
A) contain an apparatus for receiving audio for receiving acoustical signal;
B) contain A/D converter, be connected with apparatus for receiving audio, the acoustical signal that step a apparatus for receiving audio is received is converted into time-domain digital input signal;
C) contain one minute frame device, be connected with A/D converter, the time-domain digital input signal in step b is carried out to temporal minute frame, obtain a minute frame signal;
Whether d) contain monobasic voice endpoint detector, be connected with a minute frame device, be the judgement of vowel to minute frame signal obtaining in step c; If during vowel, carry out follow-up step; If not during vowel, do not carry out follow-up step;
E) contain a parameter extractor, be connected with a minute frame device, minute frame signal that step c is obtained is analyzed, and obtains pitch period and parameter.
F) contain a tone intensifier, be connected with parameter extractor, the pitch period of the speech frame signal obtaining in step e is strengthened, obtain new pitch period.
G) contain a synthesizer, be connected with tone intensifier, the parameter in the new pitch period obtaining and step e is synthesized to the voice output being strengthened after tone in step f.
H) contain a hearing aid algorithms unit, be connected with synthesizer, to the voice output being strengthened in step g after tone, calculate the signal after compensation.
I) contain a D/A converter, be connected with hearing aid algorithms unit, the signal calculating after compensation in step h is converted into acoustical signal, then by an audio output device, export.
Within described minute, frame device is divided into overlapping or nonoverlapping minute frame signal by time-domain digital input signal.
The course of work of described vowel end point detector is: whether vowel end point detector is that vowel judges to minute frame signal of input.Only, when a minute frame signal is judged as vowel, carry out follow-up computing.
Described parameter extractor has adopted the technology of phonetic synthesis, by the method for pitch synchronous analysis, from minute frame signal, extracts pitch period.
Described tone intensifier, according to the Changing Pattern of pitch period, by expanding the method for difference on the frequency, calculates the new pitch period after enhancing.
Described synthesizer has also used the technology of phonetic synthesis, utilizes new pitch period and other parameters, generates the voice output after strengthening tone.
Described hearing aid algorithms unit, has been used to test and has joined the definite gain of formula, the voice output after the strengthening tone receiving is amplified to the signal after being compensated.
The involved in the present invention hearing aids strengthening with Chinese tones, goes the processing of signal processing method based on to audio frequency.Its process comprises a minute frame, vowel end-point detection, parameter extraction, pitch period adjustment and phonetic synthesis.See Fig. 1
From the voice of apparatus for receiving audio input, through A/D analog-to-digital conversion, be continuous digital signal, then input divides frame device.Divide the operation principle of frame device to be: data, after undue frame device, form the data block of Yi Zhengwei unit.Between piece and piece, exist certain overlapping, to guarantee the continuity of sound after audio signal reduction.
The process of described vowel end point detector is: because the energy of consonant is less and concentrate on high frequency, the energy comparison of vowel is large, and mainly concentrates within the scope of the frequency domain of people's sounding.By this principle, vowel can be made a distinction from background noise.
The process of described parameter extractor is: when being judged to be vowel, the frame signal of input is carried out to parameter extraction.Idiographic flow is, utilizes speech synthesis technique, first from minute frame signal, extracts the residual signals of removing channel information, then from residual signals, extracts the pitch of this frequency range.
The process of described tone intensifier is: record the initial pitch period numerical value of this yuan of segment, the pitch period of present frame and its difference are amplified, amplified the fluctuations of pitch period, thereby realize the adjustment of pitch period.After pitch period is adjusted, the pitch signal of first sound does not change substantially, and the fluctuating of its excess-three tone has all been enhanced.
The process of described synthesizer is: first use new pitch period and the synthetic residual signals of other parameters after adjusting.Then utilize the speech frame signal after the synthetic pitch adjusted of original channel information.The voice output finally being strengthened after tone by overlap-add method.Then export to hearing aid algorithms unit.
Described hearing aid algorithms unit, voice output after the strengthening tone of reception synthesizer output, then according to wearer's hearing loss situation, utilizes to test and joins the compensation method that formula calculates, error frame signal is amplified accordingly to the signal frame after can being compensated.Be sent to D/A by being exported by audio output device, thereby complete the enhancing to Chinese tone, to realize, help to listen barrier patient to improve the object of the discrimination of Chinese speech.
Claims (8)
1. the digital deaf-aid with Chinese tones Enhancement Method, it is characterized in that comprising apparatus for receiving audio, A/D converter, divide frame device, vowel end point detector, parameter extractor, tone intensifier, synthesizer, hearing aid algorithms unit, D/A converter and audio output device, described A/D converter is connected with apparatus for receiving audio, a described minute frame device is connected with A/D converter, described parameter extractor is connected with a minute frame device, described tone intensifier is connected with parameter extractor, described synthesizer is connected with tone intensifier, described hearing aid algorithms unit is connected with synthesizer, described D/A converter is connected with hearing aid algorithms unit, described audio output device is connected with D/A converter, between described minute frame device and parameter extractor, be connected with vowel end point detector.
2. with an Enhancement Method for the digital deaf-aid of Chinese tones Enhancement Method, it is characterized in that comprising the steps:
Contain an apparatus for receiving audio for receiving acoustical signal;
Contain A/D converter, be connected with apparatus for receiving audio, the acoustical signal that step a apparatus for receiving audio is received is converted into time-domain digital input signal;
Contain one minute frame device, be connected with A/D converter, the time-domain digital input signal in step b is carried out to temporal minute frame, obtain a minute frame signal;
Whether contain monobasic voice endpoint detector, be connected with a minute frame device, be the judgement of vowel to minute frame signal obtaining in step c; If during vowel, carry out follow-up step; If not during vowel, do not carry out follow-up step;
Contain a parameter extractor, be connected with a minute frame device, minute frame signal that step c is obtained is analyzed, and obtains pitch period and parameter;
Contain a tone intensifier, be connected with parameter extractor, the pitch period of the speech frame signal obtaining in step e is strengthened, obtain new pitch period;
Contain a synthesizer, be connected with tone intensifier, the parameter in the new pitch period obtaining and step e is synthesized to the voice output being strengthened after tone in step f;
Contain a hearing aid algorithms unit, be connected with synthesizer, to the voice output being strengthened in step g after tone, calculate the signal after compensation;
Contain a D/A converter, be connected with hearing aid algorithms unit, the signal calculating after compensation in step h is converted into acoustical signal, then by an audio output device, export.
3. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, is characterized in that: within described minute, frame device is divided into partly overlapping minute frame signal by time-domain digital input signal.
4. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, is characterized in that: the course of work of described vowel end point detector is: whether vowel end point detector is that vowel judges to minute frame signal of input;
Only, when a minute frame signal is judged as vowel, carry out follow-up computing.
5. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, it is characterized in that: described parameter extractor has adopted the technology of phonetic synthesis, by the method for pitch synchronous analysis, from minute frame signal, extract pitch period.
6. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, it is characterized in that: described tone intensifier is according to the Changing Pattern of pitch period, by expanding the method for difference on the frequency, calculate the new pitch period after enhancing.
7. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, it is characterized in that: described synthesizer has also used the technology of phonetic synthesis, utilize new pitch period and other parameters, generate the voice output after strengthening tone.
8. the Enhancement Method of a kind of digital deaf-aid with Chinese tones Enhancement Method according to claim 2, it is characterized in that: described hearing aid algorithms unit, used to test and joined the definite gain of formula, the voice output after the strengthening tone receiving has been amplified to the signal after being compensated.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798789A (en) * | 2018-08-03 | 2020-02-14 | 张伟明 | Hearing aid and method of use |
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| CN1598927A (en) * | 2004-08-31 | 2005-03-23 | 四川微迪数字技术有限公司 | Chinese voice signal process method for digital deaf-aid |
| US20110243356A1 (en) * | 2008-09-25 | 2011-10-06 | Takuji Koike | Embedded audiphone |
| CN102222507A (en) * | 2011-06-07 | 2011-10-19 | 中国科学院声学研究所 | Method and equipment for compensating hearing loss of Chinese language |
| CN103035252A (en) * | 2011-09-30 | 2013-04-10 | 西门子公司 | Chinese speech signal processing method, Chinese speech signal processing device and hearing aid device |
| CN103035237A (en) * | 2011-09-30 | 2013-04-10 | 西门子公司 | Chinese speech signal processing method, device and hearing aid device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598927A (en) * | 2004-08-31 | 2005-03-23 | 四川微迪数字技术有限公司 | Chinese voice signal process method for digital deaf-aid |
| US20110243356A1 (en) * | 2008-09-25 | 2011-10-06 | Takuji Koike | Embedded audiphone |
| CN102222507A (en) * | 2011-06-07 | 2011-10-19 | 中国科学院声学研究所 | Method and equipment for compensating hearing loss of Chinese language |
| CN103035252A (en) * | 2011-09-30 | 2013-04-10 | 西门子公司 | Chinese speech signal processing method, Chinese speech signal processing device and hearing aid device |
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| CN110798789A (en) * | 2018-08-03 | 2020-02-14 | 张伟明 | Hearing aid and method of use |
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Application publication date: 20141008 |