CN103248727A - Recording device - Google Patents
Recording device Download PDFInfo
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- CN103248727A CN103248727A CN2012100222262A CN201210022226A CN103248727A CN 103248727 A CN103248727 A CN 103248727A CN 2012100222262 A CN2012100222262 A CN 2012100222262A CN 201210022226 A CN201210022226 A CN 201210022226A CN 103248727 A CN103248727 A CN 103248727A
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Abstract
The embodiment of the invention relates to a recording device which comprises a first main microphone, a second main microphone, an assistant microphone and a central processing unit, wherein the first main microphone and second main microphone are used for picking up first voice of the required recording direction determined by the first main microphone and the second main microphone; the assistant microphone is used for picking up a second voice of the assistant microphone; and the central processing unit is used for picking up the first voice and the second voice, and filtering a voice smaller than the default sound loudness threshold value in the first voice and the second voice.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of recording device.
Background technology
At present, straight plate in actual applications, renovate or the slide phone terminal all has recording, recording function, the user use straight plate, renovate or the slide phone terminal is recorded, when recording a video, record some noises or interference signal into simultaneously in the capital, the user is when playback, which is difficult to distinguish is useful recording, video signal, and which is noise or interference signal, causes user recording, video recording effect to reduce.
In the prior art, what generally adopt is the purpose that dual microphone noise reduction scheme reaches noise reduction, and Fig. 1 is microphone array schematic diagram in the prior art; As shown in Figure 1, the microphone array by two microphones are formed has directive property in acoustic characteristic, utilizes microphone array to realize the purpose of noise reduction, and Fig. 2 is microphone arrangement figure in the prior art middle straight-plate mobile phone; Fig. 3 for renovate in the prior art or slide phone in microphone arrangement figure; As shown in Figures 2 and 3, main microphone is installed in mobile phone terminal front bottom, picks up the sound of user mouth, and secondary microphone is installed near the camera, picks up background sound, and the microphone array that is made of major and minor microphone is realized the reduction of noise.
The shortcoming that realizes the noise reduction scheme in the prior art is because sensitivity and the omnidirectional of major and minor microphone in mobile phone terminal is not high, and mobile phone terminal is also included a large amount of noises when recording, video recording simultaneously, makes the effect of recording, video recording undesirable.
Summary of the invention
The embodiment of the invention discloses a kind of recording device, realizing the user when using mobile phone recording, video recording, with efficiently, accurately the event of needs is recorded or recorded a video, improve the effect of mobile phone recording, video recording.
In first aspect, the embodiment of the invention discloses a kind of recording device, the method of described raising recording quality comprises: the first main microphone and the second main microphone are used for picking up the described first main microphone and determined first sound that needs recording direction of the second main microphone;
Secondary microphone is for second sound that picks up described secondary microphone;
Central processing unit be used for to receive described first sound and second sound, and described first sound of filtering and second sound are medium and small in the sound of default sound intensity threshold values.
By using the disclosed recording device of the embodiment of the invention, but the recording device filtering first main microphone, the second main microphone and secondary microphone pick up less than the sound of default sound intensity threshold value and strengthen algorithm by volume and improve the directive property that the first main microphone and the second main microphone pick up sound, improve recording effect.
Description of drawings
Fig. 1 is microphone array schematic diagram in the prior art;
Fig. 2 is the major and minor microphone arrangement figure of prior art middle straight-plate mobile phone;
Fig. 3 renovates or the major and minor microphone arrangement figure of slide phone in the prior art;
Fig. 4 is the disclosed recording device structure chart of the embodiment of the invention;
Fig. 5 is recording device figure in the disclosed bar phone of the embodiment of the invention;
Fig. 6 arranges the recording device flow chart in the disclosed bar phone of the embodiment of the invention;
Fig. 7 for the embodiment of the invention disclosed renovate or slide phone in recording device figure;
Fig. 8 renovates for the embodiment of the invention is disclosed or slide phone arranges the recording device flow chart.
Embodiment
For the technical scheme and the advantage that make the embodiment of the invention is clearer, below in conjunction with accompanying drawing the specific embodiment of the invention is described in further detail.
Be the method that example describes the disclosed raising recording quality of the embodiment of the invention in detail below with Fig. 4, Fig. 4 is the disclosed recording device structure chart of the embodiment of the invention.
As shown in Figure 4, recording device comprises: the first main microphone, the second main microphone, secondary microphone and central processing unit, and the first main microphone and the second main microphone are used for picking up the first main microphone and determined first sound that needs recording direction of the second main microphone; Secondary microphone is used for picking up second sound of described secondary microphone; Central processing unit be used for to receive first sound and second sound, and filtering first sound and second sound are medium and small in the sound of default sound intensity threshold values.
Because the voice signal that the first main microphone, the second main microphone, secondary microphone pick up is analog signal, the voice signal that central processing unit also is used for the first main microphone, the second main microphone and secondary microphone are picked up is converted to digital signal, and the first main microphone, the second main microphone and secondary the microphone voice signal that picks up and the sound intensity threshold value of presetting are compared.
Also comprise controller in the recording device, controller is used for strengthening algorithm by volume and improves first sound and second sound that surpasses default sound intensity threshold value.
Also comprise memory in the recording device, be used for first sound and second sound that storage surpasses described default sound intensity threshold value.
In embodiments of the present invention, described recording device is included in mobile phone terminal inside, under the situation of recording, the professional can be by the platform setting, namely original first main microphone in bottom, mobile phone terminal front is set to secondary microphone in the inner passage of mobile phone terminal, near original secondary microphone the camera of the mobile phone terminal back side is set to the first main microphone, and the first main microphone place after exchange increases by the second main microphone again, namely exchange the back and near the camera of the mobile phone terminal back side, comprise two main microphones, according to the dual microphone principle of noise reduction, it is blind source partition method, by the first main microphone and the second main microphone after exchanging, pick up first sound of recording direction, the microphone array of two main microphone formation has sound directivity; Secondary microphone after the exchange picks up second sound of background direction, whether the sound size that the second main microphone of the first main microphone, secondary microphone and increase after relatively exchanging picks up surpasses default sound intensity threshold value, if the sound that picks up does not have to surpass default sound intensity threshold value, then the sound that this is picked up is as noise and filtering, reach the effect of filtering recording noise, realize better recording effect.
Be example below with Fig. 5 and describe the disclosed recording device of the embodiment of the invention in detail in conjunction with Fig. 6 that Fig. 5 is recording device figure in the disclosed bar phone of the embodiment of the invention;
Under the situation of recording, the professional can be by the platform setting, namely original first main microphone in bottom, mobile phone terminal front is set to secondary microphone in the inner passage of mobile phone terminal, near original secondary microphone the camera of the mobile phone terminal back side is set to the first main microphone, and the first main microphone place after exchange increases by the second main microphone again, namely exchange the back and near the camera of the mobile phone terminal back side, comprise two microphones, according to the dual microphone principle of noise reduction, it is blind source partition method, by the first main microphone and the second main microphone after exchanging, pick up first sound of recording direction, the microphone array of two microphone formation has sound directivity; Secondary microphone after the exchange picks up second sound of background direction, whether the sound size that the second main microphone of the first main microphone, secondary microphone and increase after relatively exchanging picks up surpasses default sound threshold value, if the sound that picks up does not have to surpass default sound threshold value, then the sound that this is picked up is as noise and elimination, reach the effect of eliminating the recording noise, realize better recording effect.
Recording device figure in the bar phone as shown in Figure 5, be the secondary microphone after the inner passage by mobile phone terminal arranges in bar phone front bottom, be the first main microphone after the inner passage by mobile phone terminal arranges near the camera at the bar phone back side, with the second main microphone that increases again at the first microphone place, namely near the camera at the bar phone back side, there are two main microphones, first sound of two common pickup camera recording directions of main microphone.
Fig. 6 arranges the recording device flow chart in the disclosed bar phone of the embodiment of the invention; As shown in Figure 6, the concrete following description of handling process:
Particularly, under the situation of recording, the professional can be by the platform setting, namely near original secondary microphone camera is set to the first main microphone in the inner passage of mobile phone terminal, the first main microphone after the exchange is used for first sound of pickup camera recording direction, original first main microphone in bottom, mobile phone terminal front is set to secondary microphone, and the secondary microphone after the exchange is used for picking up second sound of background direction.
The first main microphone place after exchange increases by the second main microphone, and the microphone array that is formed by the second main microphone of the first main microphone after exchanging and increase has sound directivity, for first sound of common pickup camera recording direction.
Particularly, in Recording Process, the first main microphone after the exchange and the second main microphone are used for first sound of pickup camera recording direction, the environment that the first main microphone after namely exchanging and the second main microphone faces need be recorded, secondary microphone after the exchange is used for picking up second sound of background direction, and the secondary microphone after namely exchanging is the environment back to the needs recording.
The first main microphone after the exchange and the second main microphone faces playback environ-ment, because the first main microphone after exchanging and the second main microphone are formed microphone array, it is very high to the sensitivity that will pick up voice signal; Secondary microphone after the exchange is back to playback environ-ment, differ 90 degree or 180 degree with the first main microphone and the second main microphone after exchanging, the first main microphone and the second main microphone after its remolding sensitivity to the voice signal that needs playback environ-ment and pick up exchanges are low, but higher to the acoustic sensitivity of picking up the background direction.
Relatively being judged as recording sound or being noise of step 630, the sound that picks up according to the first main microphone, secondary microphone and the second main microphone after exchanging and sound intensity threshold value.
Particularly, comparison by step 620, if first sound of the recording direction that the first main microphone, secondary microphone and the second main microphone after exchanging pick up and second sound of background direction are less than default sound intensity threshold value, the sound that the first main microphone after then will exchanging, secondary microphone and the second main microphone pick up is handled as noise; If first sound of the recording direction that the first main microphone, secondary microphone and the second main microphone after exchanging pick up and second sound of background direction are greater than default sound intensity threshold value, the sound that the first main microphone after then will exchanging, secondary microphone and the second main microphone pick up is handled as recording sound; According to comparative result, strengthen algorithm by volume and improve greater than the loudness value in the recording sound of default sound intensity threshold value.
Be example below with Fig. 7 and describe the disclosed recording device of the embodiment of the invention in detail in conjunction with Fig. 8, Fig. 7 renovate for the embodiment of the invention is disclosed or slide phone in recording device figure;
Under the situation of recording, the professional can be by the platform setting, namely original first main microphone in bottom, mobile phone terminal front is set to secondary microphone in the inner passage of mobile phone terminal, near original secondary microphone the camera of the mobile phone terminal back side is set to the first main microphone, and the first main microphone place after exchange increases by the second main microphone again, namely exchange the back and near the camera of the mobile phone terminal back side, comprise two main microphones, according to the dual microphone principle of noise reduction, it is blind source partition method, by the first main microphone and the second main microphone after exchanging, pick up first sound of recording direction, the microphone array of two microphone formation has sound directivity; Secondary microphone after the exchange picks up second sound of background direction, whether the sound size that the second main microphone of the first main microphone, secondary microphone and increase after relatively exchanging picks up surpasses default sound intensity threshold value, if the sound that picks up does not have to surpass default sound intensity threshold value, then the sound that this is picked up is as noise and filtering, reach the effect of filtering recording noise, realize better recording effect.
As shown in Figure 7 renovate or slide phone in recording device figure, renovating or slide phone front bottom is the secondary microphone after the inner passage by mobile phone terminal arranges, renovate or the camera at the slide phone back side near be the first main microphone after the inner passage by mobile phone terminal arranges, with the second main microphone that increases again at the first microphone place, namely near the camera at the bar phone back side, there are two main microphones, first sound of two common pickup camera recording directions of main microphone.
Fig. 8 for the embodiment of the invention disclosed renovate or slide phone in the recording device flow chart is set; As shown in Figure 8, the concrete following description of handling process:
Particularly, under the situation of recording, the professional can be by the platform setting, namely near original secondary microphone camera is set to the first main microphone in the inner passage of mobile phone terminal, the first main microphone after the exchange is used for first sound of pickup camera recording direction, original first main microphone in bottom, mobile phone terminal front is set to secondary microphone, and the secondary microphone after the exchange is used for picking up second sound of background direction.
The first main microphone place after exchange increases by the second main microphone, and the microphone array that is formed by the second main microphone of the first main microphone after exchanging and increase has sound directivity, for first sound of common pickup camera recording direction.
Particularly, in Recording Process, the first main microphone after the exchange and the second main microphone are used for the sound of pickup camera recording direction, the environment that the first main microphone after namely exchanging and the second main microphone faces need be recorded, secondary microphone after the exchange is used for picking up the sound of background direction, and the secondary microphone after namely exchanging is the environment back to the needs recording.
The first main microphone after the exchange and the second main microphone faces playback environ-ment, because the first main microphone after exchanging and the second main microphone are formed microphone array, it is very high to the sensitivity that will pick up voice signal; Secondary microphone after the exchange is back to playback environ-ment, differ 90 degree or 180 degree with the first main microphone and the second main microphone after exchanging, the first main microphone and the second main microphone after its remolding sensitivity to the voice signal that needs playback environ-ment and pick up exchanges are low, but higher to the acoustic sensitivity of picking up the background direction.
Relatively being judged as recording sound or being noise of step 830, the sound that picks up according to the first main microphone, secondary microphone and the second main microphone after exchanging and sound intensity threshold value.
Particularly, comparison by step 820, if first sound of the recording direction that the first main microphone, secondary microphone and the second main microphone after exchanging pick up and second sound of background direction are less than default sound intensity threshold value, the sound that the first main microphone after then will exchanging, secondary microphone and the second main microphone pick up is handled as noise; If first sound of the recording direction that the first main microphone, secondary microphone and the second main microphone after exchanging pick up and second sound of background direction are greater than default sound intensity threshold value, the sound that the first main microphone after then will exchanging, secondary microphone and the second main microphone pick up is handled as recording sound; According to comparative result, strengthen algorithm by volume and improve greater than the loudness value in the recording sound of default sound intensity threshold value.
Need to prove, all be the method that the example explanation realizes noise reduction with the recording among the invention described above embodiment, in practical operation, and the noise noise reduction in also can realizing recording a video by above-mentioned steps; The default sound intensity threshold value of mentioning among the invention described above embodiment needs to set according to particular problem.
The professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for using distinct methods to realize described function to each, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a recording device is characterized in that, described recording device comprises:
The first main microphone and the second main microphone are used for picking up the described first main microphone and determined first sound that needs recording direction of the second main microphone;
Secondary microphone is for second sound that picks up described secondary microphone;
Central processing unit be used for to receive described first sound and second sound, and described first sound of filtering and second sound are medium and small in the sound of default sound intensity threshold values.
2. recording device according to claim 1 is characterized in that, the medium and small sound in default sound intensity threshold values of described first sound of described filtering and second sound is specially:
If second sound that first sound that the described first main microphone and the second main microphone pick up and secondary microphone pick up surpasses described default sound intensity threshold value, the voice signal that picks up of second sound that picks up of first sound that picks up of the not filtering described first main microphone and the second main microphone and secondary microphone then;
If second sound that first sound that the described first main microphone and the second main microphone pick up and secondary microphone pick up is no more than described default sound intensity threshold value, the voice signal that picks up of second sound that picks up of first sound that picks up of the filtering described first main microphone and the second main microphone and secondary microphone then.
3. recording device according to claim 2 is characterized in that, described recording device also comprises: controller is used for strengthening algorithm by volume and improves above first sound of default sound intensity threshold value and the loudness value of second sound.
4. recording device according to claim 3 is characterized in that, described recording device also comprises: memory is used for first sound and second sound that storage surpasses described default sound intensity threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100222262A CN103248727A (en) | 2012-02-01 | 2012-02-01 | Recording device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100222262A CN103248727A (en) | 2012-02-01 | 2012-02-01 | Recording device |
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| CN103248727A true CN103248727A (en) | 2013-08-14 |
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| CN2012100222262A Pending CN103248727A (en) | 2012-02-01 | 2012-02-01 | Recording device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673996A (en) * | 2013-12-10 | 2014-03-26 | 苏州市峰之火数码科技有限公司 | Method for conveniently acquiring good aerial sound |
| CN103822617A (en) * | 2013-12-11 | 2014-05-28 | 苏州市峰之火数码科技有限公司 | Aerial photography sound effect enhancing method |
| WO2016000350A1 (en) * | 2014-07-02 | 2016-01-07 | 中兴通讯股份有限公司 | Method for realising call noise elimination, terminal and computer storage medium |
| CN109166567A (en) * | 2018-10-09 | 2019-01-08 | 安徽信息工程学院 | A kind of noise-reduction method and equipment |
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| CN101431707A (en) * | 2007-11-06 | 2009-05-13 | 美商富迪科技股份有限公司 | Electronic device |
| CN101442696A (en) * | 2007-11-21 | 2009-05-27 | 宏达国际电子股份有限公司 | Method for filtering sound noise |
| CN201717913U (en) * | 2010-06-10 | 2011-01-19 | 深圳市中兴移动通信有限公司 | Mobile terminal |
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- 2012-02-01 CN CN2012100222262A patent/CN103248727A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101431707A (en) * | 2007-11-06 | 2009-05-13 | 美商富迪科技股份有限公司 | Electronic device |
| CN101442696A (en) * | 2007-11-21 | 2009-05-27 | 宏达国际电子股份有限公司 | Method for filtering sound noise |
| CN201717913U (en) * | 2010-06-10 | 2011-01-19 | 深圳市中兴移动通信有限公司 | Mobile terminal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673996A (en) * | 2013-12-10 | 2014-03-26 | 苏州市峰之火数码科技有限公司 | Method for conveniently acquiring good aerial sound |
| CN103822617A (en) * | 2013-12-11 | 2014-05-28 | 苏州市峰之火数码科技有限公司 | Aerial photography sound effect enhancing method |
| WO2016000350A1 (en) * | 2014-07-02 | 2016-01-07 | 中兴通讯股份有限公司 | Method for realising call noise elimination, terminal and computer storage medium |
| CN109166567A (en) * | 2018-10-09 | 2019-01-08 | 安徽信息工程学院 | A kind of noise-reduction method and equipment |
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Application publication date: 20130814 |
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