CN108696797A - A kind of audio electrical signal carries out frequency dividing and synthetic method - Google Patents
A kind of audio electrical signal carries out frequency dividing and synthetic method Download PDFInfo
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- CN108696797A CN108696797A CN201810473972.0A CN201810473972A CN108696797A CN 108696797 A CN108696797 A CN 108696797A CN 201810473972 A CN201810473972 A CN 201810473972A CN 108696797 A CN108696797 A CN 108696797A
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- China
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- frequency
- synthetic method
- carries out
- audio electrical
- electrical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/03—Synergistic effects of band splitting and sub-band processing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses audio electrical signals to carry out frequency dividing and synthetic method, is that the same sound source is passed through multichannel sound pick-up, generates the different MCVF multichannel voice frequency electric signal of feature, using frequency-division filter, amplification, then splices synthesis signal exports all the way.The present invention can effectively realize the collaborative SCM of voice signal, effectively increase sound quality, and have anti-noise ability.
Description
Technical field
The present invention relates to a kind of audio-frequency processing methods, and in particular to a kind of side that audio electrical signal is divided and synthesized
Method.
Background technology
Usually, the electric signal of the sound pick-ups such as microphone output, by amplification, for monitoring, recording or being output to public address sets
It is standby.But if audio signal needs multiple signals to carry out collaborative SCM (a kind of building-up process), it directly amplifies, is directly defeated
The method gone out is just not suitable for, because:The characteristics of each road signal difference (for example directional property difference is big), simple superposition is obtained by mixing
Audio signal, feature is messy, and sound quality is poor, anti-noise ability is weak.
So the multiple signals from same audio source, after analyzing respective signal characteristic, are picked out advantageous in every road signal
Frequency range, have passed through filtering (or frequency dividing) processing, then splice (or synthesis) output, meet the band requirement of needs, to improve
Sound quality, and have anti-noise ability.
Invention content
The purpose of the present invention is to provide a kind of audio electrical signals that can improve exports audio signal quality to be divided
With synthetic method.
The invention is realized in this way:
Audio electrical signal carries out frequency dividing and synthetic method, is that the same sound source is passed through multichannel sound pick-up, generates feature
Different MCVF multichannel voice frequency electric signal using frequency-division filter, amplification, then splices synthesis signal output all the way.
Further scheme is:
The frequency range feature of MCVF multichannel voice frequency electric signal is different.
Further scheme is:
In each tonal range of MCVF multichannel voice frequency electric signal, applicable frequency range can be picked out respectively.
Further scheme is:
Each applicable frequency range can be mutually linked, be spliced into signal output all the way.
By the way that different MCVF multichannel voice frequency electric signal frequency range is formed a complete working frequency range range, this hair is formed
Bright technical solution.
The present invention can effectively realize the collaborative SCM of voice signal, effectively increase sound quality, and have anti-noise ability.
Description of the drawings
Fig. 1 is the filtering of 4 tunnel audio signals of one embodiment of the invention, amplification and synthesis output schematic diagram;
Fig. 2 is each frequency band schematic diagram for being applicable in frequency range splicing and synthesizing needs of the present invention.
Specific implementation mode
The present invention is further illustrated in the following with reference to the drawings and specific embodiments.
As shown in Fig. 1, by taking 4 road signals as an example, it is originated from the multichannel pickup signal of same audio source, if gain or direction
Property it is different, and export only signal all the way, and output signal needs the collaboration of multichannel pickup signal to complete, it is necessary to each
Road pickup signal is handled differently.First, filtering, picks out best working frequency range range to each road signal and (selects and be applicable in frequency
Section);In addition, being compensated to the gain for being applicable in frequency range so that each gain for being applicable in frequency range is almost the same.By gain compensation
Each applicable frequency range afterwards, then synthesize, meet the band requirement (such as Fig. 2 examples) of needs.
When specifically selecting applicable frequency range, as shown in Fig. 2, for example, the 1st road signal is in low-frequency range f0~f1With most
Good directional properties, wherein f0(unit:Hertz) it is needed low-limit frequency, f1(unit:Hertz) it is the road signal directive property
Effective frequency before deterioration.Similarly, the 2nd road signal, the best frequency range of directive property is f1~f2, the preferably frequency of the 3rd road signal
Section is f2~f3, the best frequency range of the 4th road signal is f3~f4, and f4The required frequency band upper limit is met, then can synthesize total
Frequency band f0~f4.It is important to note that adjacent two paths of signals has handover region, the frequency point of frequency dividing can be therefrom selected, than
Such as f1,f2,f3It is exactly the part-frequency point selected from adjacent two paths of signals handover region.It can from the above-mentioned choosing method to part-frequency point
See, the total way of signal has changeability, related with products scheme;In addition, the specific frequency values of part-frequency point, and regard adjacent frequency
The audio frequency characteristics such as directive property of section integrate determination.
Finally, the applicable frequency range of paragraph 1 is selected from the 1st road signal, and (bandwidth is f0~f1), select the 2nd from the 2nd road signal
(bandwidth is f to Duan Shiyong frequency ranges1~f2) ... the 4th section of highest frequency for being applicable in frequency range is f4, then the total frequency band synthesized is f0~
f4, design needs should be able to be met.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will be fallen in principle disclosed in the present application
Within scope and spirit.
Claims (4)
1. audio electrical signal carries out frequency dividing and synthetic method, it is characterised in that:It is that the same sound source is passed through into multichannel sound pick-up,
The different MCVF multichannel voice frequency electric signal of feature is generated, using frequency-division filter, amplification, then splices synthesis signal output all the way.
2. audio electrical signal carries out frequency dividing and synthetic method according to claim 1, it is characterised in that:
The frequency range feature of MCVF multichannel voice frequency electric signal is different.
3. audio electrical signal carries out frequency dividing and synthetic method according to claim 2, it is characterised in that:
In each tonal range of MCVF multichannel voice frequency electric signal, applicable frequency range can be picked out respectively.
4. audio electrical signal carries out frequency dividing and synthetic method according to claim 3, it is characterised in that:
Each applicable frequency range can be mutually linked, be spliced into signal output all the way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473972.0A CN108696797A (en) | 2018-05-17 | 2018-05-17 | A kind of audio electrical signal carries out frequency dividing and synthetic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473972.0A CN108696797A (en) | 2018-05-17 | 2018-05-17 | A kind of audio electrical signal carries out frequency dividing and synthetic method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108696797A true CN108696797A (en) | 2018-10-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810473972.0A Pending CN108696797A (en) | 2018-05-17 | 2018-05-17 | A kind of audio electrical signal carries out frequency dividing and synthetic method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021046796A1 (en) * | 2019-09-12 | 2021-03-18 | Shenzhen Voxtech Co., Ltd. | Systems and methods for audio signal generation |
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| CN101014209A (en) * | 2007-01-19 | 2007-08-08 | 电子科技大学 | Full band natural sound effect audio directional loudspeaker |
| CN102761806A (en) * | 2012-02-14 | 2012-10-31 | 广州励丰文化科技股份有限公司 | Microphone array with wide frequency band and strong directivity |
| US20130142349A1 (en) * | 2011-09-05 | 2013-06-06 | Goertek Inc. | Method, device and system for eliminating noises with multi-microphone array |
| CN105553469A (en) * | 2015-12-11 | 2016-05-04 | 北京无线电计量测试研究所 | Low-phase noise frequency source |
| CN106303821A (en) * | 2015-06-12 | 2017-01-04 | 青岛海信电器股份有限公司 | Cross-talk cancellation method and system |
-
2018
- 2018-05-17 CN CN201810473972.0A patent/CN108696797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014209A (en) * | 2007-01-19 | 2007-08-08 | 电子科技大学 | Full band natural sound effect audio directional loudspeaker |
| US20130142349A1 (en) * | 2011-09-05 | 2013-06-06 | Goertek Inc. | Method, device and system for eliminating noises with multi-microphone array |
| CN102761806A (en) * | 2012-02-14 | 2012-10-31 | 广州励丰文化科技股份有限公司 | Microphone array with wide frequency band and strong directivity |
| CN106303821A (en) * | 2015-06-12 | 2017-01-04 | 青岛海信电器股份有限公司 | Cross-talk cancellation method and system |
| CN105553469A (en) * | 2015-12-11 | 2016-05-04 | 北京无线电计量测试研究所 | Low-phase noise frequency source |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021046796A1 (en) * | 2019-09-12 | 2021-03-18 | Shenzhen Voxtech Co., Ltd. | Systems and methods for audio signal generation |
| US11902759B2 (en) | 2019-09-12 | 2024-02-13 | Shenzhen Shokz Co., Ltd. | Systems and methods for audio signal generation |
| US12185069B2 (en) | 2019-09-12 | 2024-12-31 | Shenzhen Shokz Co., Ltd. | Systems and methods for audio signal generation |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181023 |