CN104883643A - Bass boost system and control method thereof - Google Patents
Bass boost system and control method thereof Download PDFInfo
- Publication number
- CN104883643A CN104883643A CN201510146923.2A CN201510146923A CN104883643A CN 104883643 A CN104883643 A CN 104883643A CN 201510146923 A CN201510146923 A CN 201510146923A CN 104883643 A CN104883643 A CN 104883643A
- Authority
- CN
- China
- Prior art keywords
- mixer
- low
- audio signal
- signal
- time delay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The invention discloses a bass boost system and a control method thereof. A low-pass filter constantly separates low frequency audio signals from original audio signals and transmits into a first audio mixer, the low frequency audio signals are transmitted after delay processing by a delay module into a gain adjustment module for attenuation processing, the gain adjustment returns the low frequency signals after attenuation processing to the first audio mixer, and further separated low frequency audio signals by the low-pass filter and the low frequency signals after attenuation processing are mixed through the first audio mixer and then transmitted into a second audio mixer and the delay module; and the original audio signals and the mixed signals after mixing are superimposed and outputted through the second audio mixer, and by the way that the low frequency signals are separated, then subjected to delay and attenuation processing, and repeatedly superimposed into the original signals, the bass enhancement effect is therefore achieved.
Description
Technical field
The present invention relates to Audio Signal Processing technology, particularly bass strengthens system and control method thereof.
Background technology
According to the auditory properties of people's ear, as can be seen from the equal loudness contour figure that people draw out, audio signal frequency is lower, arriving of the more difficult sensation of people's ear.
So research staff is finding the method promoting bass always, the mode promoting bass is at present mainly containing two kinds: the first utilizes equalizer to promote bass; The second is the mode strengthened by virtual bass, general employing MaxxBass algorithm or VB Phase Vocoder algorithm, the two is all utilize " fundamental tone disappearance " phenomenon produce a kind of illusion to fundamental tone when not having fundamental tone to only have series of harmonic to allow audience.
In above-mentioned method, utilize equalizer to be the simplest mode, no doubt can promote low frequency with equalizer, but do like this and can increase low frequency power consumption, reduce the useful life of loud speaker.The method utilizing virtual bass to strengthen is no doubt good, but signal processing too complex, and algorithm process speed is too slow, not easily realizes on digital processing chip DSP.
Thus prior art need to improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of bass to strengthen system and control method thereof, the bass in audio signal can be increased.
In order to achieve the above object, this invention takes following technical scheme:
A kind of bass strengthens system, it comprises: low pass filter, first mixer, time delay module, gain adjustment module and the second mixer, constantly the low-frequency audio signal in former audio signal is separated in feeding first mixer by low pass filter, low-frequency audio signal is sent in gain adjustment module and is carried out attenuation processing after time delay module delay process, low frequency signal after attenuation processing returns in the first mixer by gain adjustment module, send in the second mixer and time delay module after the low-frequency audio signal be again separated by low pass filter by the first mixer mixes with the low frequency signal after attenuation processing, by the second mixer former audio signal superposed with mixed mixed signal and export.
In described bass enhancing system, described time delay module is the mixed mixed signal of time delay again, and returns in the first mixer after carrying out attenuation processing in gain adjustment module.
In described bass enhancing system, described low pass filter comprises operational amplifier, the first resistance, the second resistance, the first electric capacity and the second electric capacity, the positive input terminal of described operational amplifier by the second resistance connect one end of the first resistance and the second electric capacity one end, also by the first capacity earth; The other end of described first resistance is former audio signal input end, and the output of the other end of the second electric capacity and the negative input end concatenation operation amplifier of operational amplifier, the output of operational amplifier connects the first mixer.
In described bass enhancing system, the resistance of described first resistance and the second resistance is 1.41 kilohms.
In described bass enhancing system, the capacitance of described first electric capacity is 1uF.
In described bass enhancing system, the capacitance of described second electric capacity is 2uF.
Bass strengthens a control method for system, and it comprises:
A, constantly the low-frequency audio signal in former audio signal to be separated in feeding first mixer by low pass filter;
Low-frequency audio signal is sent in time delay module by B, the first mixer, sends in gain adjustment module and carry out attenuation processing after time delay module delay process;
Low frequency signal after attenuation processing is sent in the first mixer by C, gain adjustment module;
Generating mixed signal after D, the low-frequency audio signal be again separated by low pass filter by the first mixer mix with the low frequency signal after attenuation processing sends in the second mixer and time delay module;
E, by the second mixer former audio signal to be superposed with mixed signal and export.
In described control method, described step D also comprises:
D1, described time delay module will be sent in gain adjustment module after mixed signal process process;
After D2, gain adjustment module carry out attenuation processing to mixed signal, perform step C.
Compared to prior art, bass provided by the invention strengthens system and control method thereof, constantly the low-frequency audio signal in former audio signal is separated in feeding first mixer by low pass filter, low-frequency audio signal is sent in gain adjustment module and is carried out attenuation processing after time delay module delay process, low frequency signal after attenuation processing returns in the first mixer by gain adjustment module, sends in second mixer and time delay module after the low-frequency audio signal be again separated by low pass filter mixes with the low frequency signal after attenuation processing by the first mixer; By the second mixer former audio signal superposed with mixed mixed signal and export, by this, low frequency signal is separated, then go in time delay, attenuation processing are added to original signal repeatedly, thus achieve the effect that bass strengthens.
Accompanying drawing explanation
The structural representation of the bass enhancing system that Fig. 1 provides for the embodiment of the present invention.
The signal schematic representation of the bass enhancing system that Fig. 2 provides for the embodiment of the present invention.
The circuit diagram of low pass filter in the bass enhancing system that Fig. 3 provides for the embodiment of the present invention.
The flow chart of the control method of the bass enhancing system that Fig. 4 provides for the embodiment of the present invention.
Embodiment
The invention provides a kind of bass and strengthen system and control method thereof, make low frequency signal when acting on loud speaker, can act on once, the compartment time acts on again, until low frequency signals decay is to not having, instead of effect once after just without, the method repeatedly superposed can be crossed, strengthen bass, enable people feel the effect of bass.
For making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1 and Fig. 2, it is respectively structural representation and signal schematic representation that bass of the present invention strengthens system.Bass provided by the invention strengthens system, comprise: low pass filter 10, first mixer 20, time delay module 30, gain adjustment module 40 and the second mixer 50, the input of described low pass filter 10 connects audio signal input end, the output of low pass filter 10 connects the first input end of the first mixer 20, the output of the first mixer 20 connects the first input end of the second mixer 50, also successively by time delay module 30, gain adjustment module 40 connects the second input of the first mixer 20, second input of the second mixer 50 connects audio signal input end, the output of the second mixer 50 is for exporting the audio signal of mixing.
Low-frequency audio signal in former audio signal is constantly separated in feeding first mixer 20 by low pass filter 10 by the present invention, low-frequency audio signal is sent in gain adjustment module 40 and is carried out attenuation processing after time delay module 30 delay process, low frequency signal after attenuation processing returns in the first mixer 20 by gain adjustment module 40, sends in second mixer 50 and time delay module 30 after the low-frequency audio signal be again separated by low pass filter 10 mixes with the low frequency signal after attenuation processing by the first mixer 20; By the second mixer 50 former audio signal superposed with mixed mixed signal and export, by this, low frequency signal is separated, then go in time delay, attenuation processing are added to original signal repeatedly, thus achieve the effect that bass strengthens.
Bass of the present invention strengthens system by first low frequency signal being separated with low pass filter 10, then being repeatedly added in former audio signal after low frequency signal time delay a period of time, realizes the effect that bass strengthens.In addition, at Signal separator with the process mixed, described time delay module 30 is sent in gain adjustment module 40 after again carrying out delay process to mixed mixed signal, returns in the first mixer 20 after carrying out attenuation processing in gain adjustment module 40.
In the embodiment of the present invention, the gain coefficient after described first blender mixing is less than 1, plays the effect of progressively decay superposition low frequency signal.
See also Fig. 3, described low pass filter 10 comprises operational amplifier A 1, first resistance R1, the second resistance R2, the first electric capacity C1 and the second electric capacity C2, the positive input terminal of described operational amplifier A 1 by the second resistance R2 connect one end of the first resistance R1 and the second electric capacity C2 one end, also by the first electric capacity C1 ground connection; The other end of described first resistance R1 is former audio signal input end, and the output of the other end of the second electric capacity C2 and the negative input end concatenation operation amplifier A1 of operational amplifier A 1, the output of operational amplifier A 1 connects the first mixer 20.
In described low pass filter 10, by the gain regulating the resistance of the first resistance R1 and the second resistance R2 can adjust operational amplifier A 1, by the amplitude range regulating the capacitance of the first electric capacity C1 and the second electric capacity C2 can adjust the signal of filtering process.During concrete enforcement, the resistance of described first resistance R1 and the second resistance R2 is 1.41 kilohms, and the capacitance of described first electric capacity C1 is 1uF, and the capacitance of described second electric capacity C2 is 2uF, only two capacitor's capacities are set as required, make the low-frequency audio signal in former audio signal leach.
In bass enhancing system of the present invention, low pass filter 10, first mixer 20, time delay module 30, gain adjustment module 40 and the second mixer 50 can pass through hardware, also software simulating can be passed through, if use software, can complete based on VisualDSP++ and the VisualAudio software platform of ADI company and SHARC dsp processor hardware platform.For a better understanding of the present invention, strengthen system below in conjunction with Fig. 1 and Fig. 2 to bass of the present invention to be described in detail:
First, former audio input signal 1 leaches low-frequency audio signal 2 come through low pass filter 10, again through the output signal 3 of the first mixer 20 by the first mixer 20, now, owing to only having low-frequency audio signal 2 through the first mixer 20, the still low-frequency audio signal 2 of therefore the first mixer 20 output.Follow-up again repeatedly mixed signal be mixed signal 3.
Afterwards, signal 3 becomes signal 4 after time delay module 30 time delay certain hour, through gain adjustment module 40, the signal 4 after this time delay is carried out decay again to carry out becoming low frequency signal 5, then feedback is delivered in the first mixer 20 and is mixed with low-frequency audio signal 2.
Afterwards, the output signal 3 of the first mixer and original input signal 1 are carried out mixing at the second mixer 50 to be superimposed as signal 6 and to export.After such process, just both contained former audio signal 1 inside output signal 6, also contains low frequency signal 5 simultaneously.The most ingenious part of the present invention is, low-frequency audio signal 2 can be added in output signal 6 repeatedly through feedback loop.
The corresponding control method providing a kind of bass to strengthen system of the present invention, refer to Fig. 4, it comprises the steps:
S100, constantly the low-frequency audio signal in former audio signal to be separated in feeding first mixer by low pass filter;
Low-frequency audio signal is sent in time delay module by S200, the first mixer, sends in gain adjustment module and carry out attenuation processing after time delay module delay process;
Low frequency signal after attenuation processing is sent in the first mixer by S300, gain adjustment module;
Generating mixed signal after S400, the low-frequency audio signal be again separated by low pass filter by the first mixer mix with the low frequency signal after attenuation processing sends in the second mixer and time delay module;
S500, by the second mixer former audio signal to be superposed with mixed signal and export.
Low frequency signal is separated by above-mentioned by the present invention, then goes in time delay, attenuation processing are added to original signal repeatedly, thus achieves the effect of bass enhancing.Specifically refer to above-described embodiment.
Further, described step S400 also comprises: S401, described time delay module will be sent in gain adjustment module after mixed signal process process; After S402, gain adjustment module carry out attenuation processing to mixed signal, perform step S300.
In sum, bass provided by the invention strengthens system and control method thereof, only needs a low pass filter blocks, a time delay module, a gain adjustment module and two mixers, do not need a lot of data operations, just can realize the effect that bass strengthens.And these modules can be easy to realize with digital processing chip DSP, do not need to expend great DSP occupancy, also do not need to take great memory headroom, processing speed is fast.Under the prerequisite of low cost, by low frequency signal is separated, then go in time delay, attenuation processing are added to original signal repeatedly, thus achieve the effect of bass enhancing.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a bass strengthens system, it is characterized in that, comprise: low pass filter, first mixer, time delay module, gain adjustment module and the second mixer, constantly the low-frequency audio signal in former audio signal is separated in feeding first mixer by low pass filter, low-frequency audio signal is sent in gain adjustment module and is carried out attenuation processing after time delay module delay process, low frequency signal after attenuation processing returns in the first mixer by gain adjustment module, send in the second mixer and time delay module after the low-frequency audio signal be again separated by low pass filter by the first mixer mixes with the low frequency signal after attenuation processing, by the second mixer former audio signal superposed with mixed mixed signal and export.
2. bass according to claim 1 strengthens system, and it is characterized in that, described time delay module is the mixed mixed signal of time delay again, and returns in the first mixer after carrying out attenuation processing in gain adjustment module.
3. bass according to claim 1 strengthens system, it is characterized in that, described low pass filter comprises operational amplifier, the first resistance, the second resistance, the first electric capacity and the second electric capacity, the positive input terminal of described operational amplifier by the second resistance connect one end of the first resistance and the second electric capacity one end, also by the first capacity earth; The other end of described first resistance is former audio signal input end, and the output of the other end of the second electric capacity and the negative input end concatenation operation amplifier of operational amplifier, the output of operational amplifier connects the first mixer.
4. bass according to claim 3 strengthens system, and it is characterized in that, the resistance of described first resistance and the second resistance is 1.41 kilohms.
5. bass according to claim 4 strengthens system, and it is characterized in that, the capacitance of described first electric capacity is 1uF.
6. the bass according to claim 2-5 any one strengthens system, and it is characterized in that, the capacitance of described second electric capacity is 2uF.
7. bass strengthens a control method for system, it is characterized in that, comprising:
A, constantly the low-frequency audio signal in former audio signal to be separated in feeding first mixer by low pass filter;
Low-frequency audio signal is sent in time delay module by B, the first mixer, sends in gain adjustment module and carry out attenuation processing after time delay module delay process;
Low frequency signal after attenuation processing is sent in the first mixer by C, gain adjustment module;
Generating mixed signal after D, the low-frequency audio signal be again separated by low pass filter by the first mixer mix with the low frequency signal after attenuation processing sends in the second mixer and time delay module;
E, by the second mixer former audio signal to be superposed with mixed signal and export.
8. control method according to claim 7, is characterized in that, described step D also comprises:
D1, described time delay module will be sent in gain adjustment module after mixed signal process process;
After D2, gain adjustment module carry out attenuation processing to mixed signal, perform step C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510146923.2A CN104883643A (en) | 2015-03-31 | 2015-03-31 | Bass boost system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510146923.2A CN104883643A (en) | 2015-03-31 | 2015-03-31 | Bass boost system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104883643A true CN104883643A (en) | 2015-09-02 |
Family
ID=53950948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510146923.2A Pending CN104883643A (en) | 2015-03-31 | 2015-03-31 | Bass boost system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104883643A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933828A (en) * | 2016-07-11 | 2016-09-07 | 东莞正阳电子有限公司 | Method for enhancing bass sound effect and circuit |
| CN106569780A (en) * | 2016-11-04 | 2017-04-19 | 北京飞利信电子技术有限公司 | Real-time audio processing method and system for multi-channel digital audio signal |
| CN106954124A (en) * | 2017-03-22 | 2017-07-14 | 万魔声学科技有限公司 | Monaural bass Enhancement Method and device, player |
| CN107959906A (en) * | 2017-11-20 | 2018-04-24 | 英业达科技有限公司 | Audio Enhancement Method and audio strengthening system |
| CN114040317A (en) * | 2021-09-22 | 2022-02-11 | 北京车和家信息技术有限公司 | Sound channel compensation method and device, electronic equipment and storage medium |
| CN116095564A (en) * | 2023-04-10 | 2023-05-09 | 深圳市嘉润原新显科技有限公司 | Display mixing circuit and display |
| CN116193322A (en) * | 2023-04-25 | 2023-05-30 | 南京芯驰半导体科技有限公司 | Audio processing circuit, method, electronic device and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0683379A (en) * | 1992-09-03 | 1994-03-25 | Rohm Co Ltd | Echo adding circuit |
| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN1248761A (en) * | 1998-09-22 | 2000-03-29 | 雅马哈株式会社 | Digital echo circuit |
| CN1776805A (en) * | 2004-11-16 | 2006-05-24 | 凌阳科技股份有限公司 | Low internal-memory-demand digital reverberation system and method |
-
2015
- 2015-03-31 CN CN201510146923.2A patent/CN104883643A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0683379A (en) * | 1992-09-03 | 1994-03-25 | Rohm Co Ltd | Echo adding circuit |
| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN1248761A (en) * | 1998-09-22 | 2000-03-29 | 雅马哈株式会社 | Digital echo circuit |
| CN1776805A (en) * | 2004-11-16 | 2006-05-24 | 凌阳科技股份有限公司 | Low internal-memory-demand digital reverberation system and method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105933828A (en) * | 2016-07-11 | 2016-09-07 | 东莞正阳电子有限公司 | Method for enhancing bass sound effect and circuit |
| CN106569780A (en) * | 2016-11-04 | 2017-04-19 | 北京飞利信电子技术有限公司 | Real-time audio processing method and system for multi-channel digital audio signal |
| CN106569780B (en) * | 2016-11-04 | 2021-12-07 | 北京飞利信电子技术有限公司 | Real-time sound effect processing method and system for multi-channel digital audio signal |
| CN106954124A (en) * | 2017-03-22 | 2017-07-14 | 万魔声学科技有限公司 | Monaural bass Enhancement Method and device, player |
| CN106954124B (en) * | 2017-03-22 | 2022-09-02 | 万魔声学股份有限公司 | Single-channel bass enhancement method and device and player |
| CN107959906A (en) * | 2017-11-20 | 2018-04-24 | 英业达科技有限公司 | Audio Enhancement Method and audio strengthening system |
| CN114040317A (en) * | 2021-09-22 | 2022-02-11 | 北京车和家信息技术有限公司 | Sound channel compensation method and device, electronic equipment and storage medium |
| CN114040317B (en) * | 2021-09-22 | 2024-04-12 | 北京车和家信息技术有限公司 | Sound channel compensation method and device for sound, electronic equipment and storage medium |
| CN116095564A (en) * | 2023-04-10 | 2023-05-09 | 深圳市嘉润原新显科技有限公司 | Display mixing circuit and display |
| CN116095564B (en) * | 2023-04-10 | 2023-06-23 | 深圳市嘉润原新显科技有限公司 | Display mixing circuit and display |
| CN116193322A (en) * | 2023-04-25 | 2023-05-30 | 南京芯驰半导体科技有限公司 | Audio processing circuit, method, electronic device and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104883643A (en) | Bass boost system and control method thereof | |
| CN104012112B (en) | System and method for bass boost | |
| EP1817939B1 (en) | A stereo widening network for two loudspeakers | |
| US20160365083A1 (en) | Low-Power-Consumption Active Noise-Reduction In-Ear Music Headphones and Method for Noise Reduction | |
| EP1428411B2 (en) | Method and device for controlling the bass reproduction of audio signals in electroacoustic transducers | |
| CN207572065U (en) | Multi-channel audio adjusting device and audio playing equipment | |
| CN101964190A (en) | Method and device for restoring signal under speaker cut-off frequency to original sound | |
| CN105208189B (en) | Audio-frequency processing method and mobile terminal | |
| US20110317841A1 (en) | Method and device for optimizing audio quality | |
| CN104471961A (en) | Adaptive bass processing system | |
| CN100593323C (en) | Automatic sound volume adjusting method and system | |
| CN106941643B (en) | A kind of multi-functional intelligent sound control method of set | |
| CN103780214A (en) | Method and device for adjusting audio equalizer | |
| CN106601268A (en) | Multimedia data processing method and device | |
| CN109074813A (en) | Handle high definition audio data | |
| US8224469B2 (en) | Systems and methods for controlling audio volume in the processor of a high definition audio codec | |
| CN101516055A (en) | Method and device capable of simulating three-dimensional echo sound effect in different acoustic environments | |
| CN106487354A (en) | Music player | |
| US20240187806A1 (en) | Virtualizer for binaural audio | |
| CN2938669Y (en) | Bass processing circuit | |
| CN110992969B (en) | Filter bank configuration method and device of electronic cochlea | |
| CN103744335B (en) | A kind of embedded digital sound-effect processing equipment | |
| CN209627668U (en) | Virtual bass mould group and audio processing chip | |
| CN206728281U (en) | A kind of apparatus for processing audio | |
| CN203689074U (en) | Embedded digital sound effect processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| 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: 20150902 |