CN102110443A - Noise cancelling circuit and electronic device thereof - Google Patents
Noise cancelling circuit and electronic device thereof Download PDFInfo
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- CN102110443A CN102110443A CN2009102668191A CN200910266819A CN102110443A CN 102110443 A CN102110443 A CN 102110443A CN 2009102668191 A CN2009102668191 A CN 2009102668191A CN 200910266819 A CN200910266819 A CN 200910266819A CN 102110443 A CN102110443 A CN 102110443A
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- noise
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- sound signal
- noise canceller
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Abstract
The invention discloses a noise cancelling circuit and an electronic device thereof. The electronic device is provided with a voice chip inside, which is used for outputting a voice signal, wherein the voice chip is electrically connected with a noise cancelling circuit which is used for filtering the noise in the voice signal.
Description
Technical field
The present invention is relevant for a kind of noise canceller circuit and electronic installation thereof, particularly relevant for a kind of noise of eliminating speech sound signal, improves that voice are listened to or the electronic installation of result of broadcast.
Background technology
At present, brag about function, become the characteristic of the main demand of e-dictionary with true man's pronunciation.In order to promote the competitive power of e-dictionary in market, each tame manufacturer is absorbed in the improvement of phonetic function invariably and wants simultaneously and can reduce production costs.The true man that some manufacturer emphasized record special sound, because its data volume is big, and the kind of system's output is subjected to very big restriction, quite expend cost, so, most of manufacturers all come the pronunciation near true man in the synthetic mode of speech analysis, can allow e-dictionary can save speech data memory and improve sound quality.Yet this kind synthetic speech, itself promptly is subjected to the restriction of many environmental factors, causes having in the voice too much noise effect sound quality, reduces user's audibility.
On the other hand, along with the progress of communication system, gradually with error correction as the purposes of improving communication quality.In the at present carry-on digital product, yet carry-on digital product all has a jack uses the earphone conversation to electrically connect an earphone or a speech microphone in order to the end user, user's voice are given orders or instructions by the built-in speech chip output of carry-on digital product, but be subject to the arithmetic capability of speech chip own, processing procedure or dispatch from the factory before the restriction of fine setting, make speech play or the effect listened to unsatisfactory.Still more, utilize speech microphone to pass on a message, must comprise many neighbourhood noises, and these noise warning signals can influence the effect of listening to, for example, and in one section session, in the blank stage that two users do not talk, its The noise will be obvious especially, and the sound of just often hearing that rustles causes the quality of session voice therefore to reduce.
Moreover, the traditional voice chip all directly picks out earphone (handset), joint (headset) and microphone (speaker) signal, though it promptly designs at the beginning for manufacturer, but often in practical application, can't satisfy the specification standard, cause product to produce because of the too poor problem that can't shipment of quality.
Summary of the invention
Because the problem of above-mentioned known technology, purpose of the present invention is providing a kind of noise canceller circuit and electronic installation thereof exactly, to solve the audible signals that known electronic is exported, has the problem that more noise causes aphthenxia in its signal.
According to purpose of the present invention, a kind of noise canceller circuit is proposed, it is in order to eliminate the noise of a speech sound signal.Noise canceller circuit has an input end, at least one rectifying and wave-filtering layer and an output terminal.Input end receives a speech sound signal of speech chip output, the rectifying and wave-filtering layer electrically connects input end, and in order to the noise that filters the speech sound signal that input end receives to form an output signal, output terminal then electrically connects this rectifying and wave-filtering layer, gives an output unit in order to output through output signal.Wherein, noise canceller circuit has at least one resistance and at least one electric capacity, and in parallel with two electric capacity to form a rectifying and wave-filtering layer by resistance.
According to another purpose of the present invention, a kind of electronic installation is proposed, it comprises a speech chip and a noise canceller circuit.Speech chip is arranged in the electronic installation, this speech chip is in order to exporting a speech sound signal, and noise canceller circuit is arranged on this output terminal, and noise canceller circuit receives speech sound signal, and, improve the speech quality of the speech sound signal of electronic installation in order to filter the noise in the speech sound signal.
Description of drawings
Fig. 1 has illustrated the first embodiment calcspar of noise canceller circuit of the present invention and electronic installation thereof.
Fig. 2 has illustrated the second embodiment calcspar of noise canceller circuit of the present invention and electronic installation thereof.
Fig. 3 has illustrated noise canceller circuit synoptic diagram of the present invention.
Fig. 4 has illustrated the first embodiment circuit diagram of noise canceller circuit of the present invention and electronic installation thereof.
Fig. 5 has illustrated the second embodiment circuit diagram of noise canceller circuit of the present invention and electronic installation thereof.
The main element symbol description
11: electronic installation
12: speech chip
121: speech sound signal
13: noise canceller circuit
131: output signal
14: holding circuit
15: output unit
16: mobile phone
17: earphone
171: L channel
172: R channel
18: microphone
21: input end
22: output terminal
23: the rectifying and wave-filtering layer
31: the first noise canceller circuits
32: the second noise canceller circuits
33: microphone chip
34: the message chip
41: the three noise canceller circuits
42: compound chip
Embodiment
See also Fig. 1, it is the first embodiment calcspar of noise canceller circuit of the present invention and electronic installation thereof.Among the figure, electronic installation 11 has a speech chip 12 and a noise canceller circuit 13.Speech chip 12 is arranged in the electronic installation 11, this speech chip 12 outputs one speech sound signal 121, and noise canceller circuit 13 electrically connects with speech chip 12, noise canceller circuit 13 receives speech sound signal 121, and, use obtaining an output signal 131 in order to filter the noise in the speech sound signal 121.So, can improve the speech quality of the speech sound signal of electronic installation 11.
One output unit 15 is connected with electronic installation 11 by the jack on the electronic installation 11, and the speech sound signal 131 after these output unit 15 outputs are handled is given the user.Further specify, electronic installation 11 can be a mobile phone, an individual digital moves an assistant (PDA) or an e-dictionary.
See also Fig. 2, it is the second embodiment calcspar of noise canceller circuit of the present invention and electronic installation thereof.Among the figure, mobile phone 16 has a speech chip 12 and a noise canceller circuit 13.Speech chip 12 is arranged in the mobile phone 16, this speech chip 12 is in order to export a speech sound signal 121, and noise canceller circuit 13 receives this speech sound signal 121 by its input end, and in order to filter the noise in the speech sound signal 121, use obtaining an output signal 131, then export by the output terminal of noise canceller circuit 13 again.So, can improve the speech quality of the speech sound signal of mobile phone 16, improve the identification of voice.Mobile phone 16 also comprises a holding circuit 14, and holding circuit 14 electrically connects with noise canceller circuit 12, and this holding circuit 14 is not subjected to static or over-current damage in order to protection speech chip 12.
Furthermore, an earphone 17 and a microphone 18 electrically connect by jack on the mobile phone 16 and mobile phone 16, and this earphone 17 comprises a L channel 171 and a R channel 172.Output signal 131 then gives the user by this jack from L channel 171 and R channel 172 outputs.Or the voice that the user sent of mobile phone 16 after receiving by microphone 18, behind noise canceller circuit 13 filtered noises, transmit in the mode of wireless signal and to give other people.
Please continue and consult Fig. 3, it is a noise canceller circuit synoptic diagram of the present invention.Among the figure, noise canceller circuit 13 can be in order to eliminate the noise of speech sound signal, and wherein, noise canceller circuit 13 is applicable to an electronic installation.A noise canceller circuit 13 and a speech chip electrically connect, and this speech sound signal can be exported by speech chip.Noise canceller circuit 13 has at least one resistance and an electric capacity, resistance can be in parallel with two electric capacity to form at least one rectifying and wave-filtering layer 23, the resistance value and the capacitance of each rectifying and wave-filtering layer 23 mate mutually, use and filter the interior noise of speech sound signal to form an output signal.Wherein, noise canceller circuit 13 has an input end 21 and an output terminal 22, rectifying and wave-filtering layer 23 electrically connects input end 21 and output terminal 22 respectively, speech sound signal is eliminated circuit 13 by input end 21 input noises, noise canceller circuit 13 produces output signal in order to the noise of eliminating in the speech sound signal 121, then, use the quality that improves speech sound signal from output terminal 22 outputs.Further specify, when the signal of noise or high frequency enters, electric capacity in the noise canceller circuit is then treated as short circuit, noise will be blocked in resistance and can't help the output terminal output of noise canceller circuit 13, use the effect of reaching filtering and rectification, that is this noise canceller circuit 13 can filter the signal of particular frequency bin, for example: low-pass filtering, high-pass filtering or bandpass filtering etc.Wherein, when 23 at least three layers on rectifying and wave-filtering layer, can obtain preferable noise cancel effect.
On the other hand, the voice that electronic installation can receive the user by a microphone also can receive external audible signals by earphone to transmit other people.So the employed speech chip of electronic installation can be divided into message chip and the radio reception chip that is used in microphone and earphone respectively, or use on the ear microphone, integrate the compound chip of radio reception and output message.Noise canceller circuit of the present invention and electronic installation thereof, it can do appropriateness adjustment to its resistance value and capacitance at the speech sound signal of different different frequencies that chip produces.See also Fig. 4 and Fig. 5.
Fig. 4 is the first embodiment circuit diagram of noise canceller circuit of the present invention and electronic installation thereof.Among the figure, electronic installation inside is provided with a radio reception chip 33 and a message chip 34, this message chip 34 is in order to export an audible signals, wherein, the message chip 34 and first noise canceller circuit 31 electrically connect, the radio reception chip 33 and second noise canceller circuit 32 electrically connect, and it is in order to export user's voice.This first noise canceller circuit 31 is in order to filter the noise in the audible signals, avoid audible signals to be subjected to interference of noise, then via first noise canceller circuit, 31 filtered noises, resulting noiseless audible signals can be exported from electronic installation by output unit, user's voice that radio reception chip 33 is exported, also can carry out filter rectification, make the lamprophoniaization of its user by the microphone transmission by second noise canceller circuit 32.So, the present invention can improve the speech quality of electronic installation 11, and the sound that makes the user hear has better tonequality.
So, noise canceller circuit of the present invention can adapt to the speech sound signal of different phonetic different frequency that chip is exported, and uses corresponding resistance value and capacitance, thereby obtains different RC constants, to filter the signal of characteristic frequency, use the effect that reaches noise filtering.For example, the C1 of first noise canceller circuit 31 of present embodiment and the capacitance of C4 can be 0.1 μ F, and the capacitance of C2-3 and C5-6 can be 0.47 μ F, and the resistance value of R1 can be 10K Ω, and the resistance value of R2 can be 12K Ω.Again, the C7-8 of second noise canceller circuit 32 and the electric capacity of C10-11 can be 0.1 μ F, and the capacitance of C6 and C12 can be 0.47 μ F, and the resistance value of R3 and R4 can be 10K Ω.Furthermore, the output terminal of noise canceller circuit of the present invention also can connect a holding circuit (figure do not show) and not be subjected to excess current or electrostatic breakdown with protection radio reception chip 33 and message chip 34.
Please continue and consult Fig. 5, it is the second embodiment circuit diagram of noise canceller circuit of the present invention and electronic installation thereof.Among the figure, the inside of electronic installation is provided with a compound chip 42, this compound chip 42 receives user's speech sound signal from microphone, or from earphone output speech sound signal, compound chip 42 and the 3rd noise canceller circuit 41 electrically connect, this the 3rd noise canceller circuit 41 avoids speech sound signal to be subjected to interference of noise in order to filter the noise in the speech sound signal.The 3rd noise canceller circuit 41 has at least one resistance and at least one electric capacity, and wherein, noise the 3rd is eliminated circuit 41 and be can be a RC circuit.The resistance of the 3rd noise canceller circuit 41 is in parallel with two electric capacity to form at least one rectifying and wave-filtering layer.Then via each rectifying and wave-filtering layer 23 with filtered noise, resulting output signal can be exported from electronic installation by earphone.
In addition, the user also can be by the noise in the 3rd noise canceller circuit 41 elimination signals from the speech sound signal that microphone is imported.So, the present invention can improve the speech quality of electronic installation, and the sound that makes the user hear has better tonequality.Use different resistance value and capacitance, thereby obtain different RC constants, remove the signal of characteristic frequency by this, reach noise cancel effect.For example, the C13-14 of the 3rd noise canceller circuit 41 and the capacitance of C16-17 can be 0.22 μ F, and the capacitance of C15 and C18 can be 0.47 μ F, and the resistance value of R5 can be 10K Ω, and the resistance value of R6 can be 10K Ω.Furthermore, the output terminal of noise canceller circuit of the present invention more can connect a holding circuit (figure do not show) and not be subjected to excess current or electrostatic breakdown with protection compound chip 42.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the scope of claims its equivalent modifications of carrying out or change.
Claims (14)
1. a noise canceller circuit is characterized in that, comprises:
One input end, it is in order to receive a speech sound signal;
At least one rectifying and wave-filtering layer electrically connects this input end, and in order to filter a noise of this speech sound signal that this input end receives, to form an output signal; And
One output terminal electrically connects this rectifying and wave-filtering layer, exports an output unit in order to will export this output signal.
2. noise canceller circuit as claimed in claim 1 is characterized in that, respectively this rectifying and wave-filtering layer comprises at least one resistance and at least one electric capacity.
3. noise canceller circuit as claimed in claim 2 is characterized in that, respectively this rectifying and wave-filtering layer is composed in parallel by this resistance and two these electric capacity.
4. noise canceller circuit as claimed in claim 2 is characterized in that, the resistance value and the capacitance of this rectifying and wave-filtering layer mate mutually, uses the interference noise that filters in this speech sound signal.
5. noise canceller circuit as claimed in claim 4 is characterized in that, visual this speech sound signal frequency of the resistance value of this resistance and the capacitance of this electric capacity is adjusted.
6. an electronic installation is characterized in that, comprises:
At least one speech chip is exported a speech sound signal; And
At least one noise canceller circuit, it comprises:
One input end, it is in order to receive this speech sound signal of this speech chip output;
At least one rectifying and wave-filtering layer electrically connects this input end, and in order to filter a noise of this speech sound signal that this input end receives, to form an output signal; And
One output terminal electrically connects this rectifying and wave-filtering layer, in order to export this output signal to an output unit.
7. electronic installation as claimed in claim 6 is characterized in that, also comprises a holding circuit, and this holding circuit and this noise canceller circuit electrically connect.
8. electronic installation as claimed in claim 6 is characterized in that, this holding circuit is not subjected to static or over-current damage in order to protect this speech chip.
9. electronic installation as claimed in claim 6 is characterized in that, respectively this rectifying and wave-filtering layer has at least one resistance and an electric capacity.
10. electronic installation as claimed in claim 9 is characterized in that, respectively this rectifying and wave-filtering layer is composed in parallel by this resistance and two these electric capacity.
11. electronic installation as claimed in claim 9 is characterized in that, respectively the resistance value of this rectifying and wave-filtering layer and capacitance mate mutually, use the noise that filters in this speech sound signal.
12. electronic installation as claimed in claim 9 is characterized in that, the frequency of visual this speech sound signal of capacitance of the resistance value of this resistance and this electric capacity is adjusted.
13. electronic installation as claimed in claim 6 is characterized in that, this output unit comprises a L channel and a R channel, and this L channel and this R channel are in order to export this output signal.
14. electronic installation as claimed in claim 6 is characterized in that, this output unit is an earphone, a microphone or an ear microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102668191A CN102110443A (en) | 2009-12-28 | 2009-12-28 | Noise cancelling circuit and electronic device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102668191A CN102110443A (en) | 2009-12-28 | 2009-12-28 | Noise cancelling circuit and electronic device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102110443A true CN102110443A (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102668191A Pending CN102110443A (en) | 2009-12-28 | 2009-12-28 | Noise cancelling circuit and electronic device thereof |
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| CN (1) | CN102110443A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108600566A (en) * | 2018-04-28 | 2018-09-28 | 维沃移动通信有限公司 | A kind of interference processing method and mobile terminal |
| CN111464918A (en) * | 2020-01-31 | 2020-07-28 | 美律电子(深圳)有限公司 | Earphone and earphone set |
-
2009
- 2009-12-28 CN CN2009102668191A patent/CN102110443A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108600566A (en) * | 2018-04-28 | 2018-09-28 | 维沃移动通信有限公司 | A kind of interference processing method and mobile terminal |
| CN108600566B (en) * | 2018-04-28 | 2021-01-08 | 维沃移动通信有限公司 | Interference processing method and mobile terminal |
| CN111464918A (en) * | 2020-01-31 | 2020-07-28 | 美律电子(深圳)有限公司 | Earphone and earphone set |
| CN111464918B (en) * | 2020-01-31 | 2021-09-10 | 美律电子(深圳)有限公司 | Earphone and earphone set |
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Application publication date: 20110629 |