CN102932710A - Method and device for bass compensation - Google Patents
Method and device for bass compensation Download PDFInfo
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- CN102932710A CN102932710A CN2012103821580A CN201210382158A CN102932710A CN 102932710 A CN102932710 A CN 102932710A CN 2012103821580 A CN2012103821580 A CN 2012103821580A CN 201210382158 A CN201210382158 A CN 201210382158A CN 102932710 A CN102932710 A CN 102932710A
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Abstract
The invention is suitable for the technical field of audio processing and provides a method and a device for bass compensation. The method comprises the steps of: separating low-frequency signals and high-frequency signals from received sound signals according to a preset loudspeaker cut-off frequency; sampling the low-frequency signals subjected to amplification treatment according to preset sampling quantity and sampling stepping quantity to generate multi-order harmonic signals; carrying out harmonic treatment on the multi-order harmonic signals and preserving the first N frequency-doubling harmonic signals in the low-frequency signals; carrying out delay treatment on the high-frequency signals; superposing the high-frequency signals subjected to delay treatment and the first N frequency-doubling harmonic signals and outputting digital audio signals; and converting the digital audio signals into analog audio signals to be sent to a loudspeaker so as to make the loudspeaker capable of producing sound. According to the invention, the high-frequency signals and the low-frequency signals are separated from the sound signals according to the loudspeaker cut-off frequency and are respectively treated and superposed, so that bass compensation is realized.
Description
Technical field
The invention belongs to the audio signal processing technique field, relate in particular to a kind of method and device of bass compensation.
Background technology
Along with the more and more miniaturization of trend of electrical equipment development, thereby cause the volume of electrical equipment loud speaker more and more less.The size of loud speaker has considerable influence to the sound expression effect of loud speaker, when the loud speaker volume reduces, vibrating diaphragm area and the magnet of loud speaker all can diminish, pressure when promoting sound vibrations reduces, cause thus the wave volume amplification effect of loud speaker to weaken, can't give expression to fully the sound low frequency part.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method and device of bass compensation, is intended to solve the problem that loud speaker can't give full expression to out the sound low frequency part.
Embodiments of the invention are achieved in that a kind of method of bass compensation, said method comprising the steps of:
According to default loud speaker cut-off frequency, the voice signal that receives is isolated low frequency signal and high-frequency signal;
Described low frequency signal is amplified processing;
According to default number of samples and sampling stepping amount, the low frequency signal sampling of amplifying after processing is generated multistage harmonic signal;
Described multistage harmonic wave is carried out filtering process, keep the top n frequency multiplication harmonic signal in the described low frequency signal, described N is the integer greater than 1;
Described high-frequency signal is carried out delay process;
Will be through high-frequency signal and the stack of described top n frequency multiplication harmonic signal of delay process, outputting digital audio signal;
Loud speaker converts described digital audio and video signals to simulated audio signal and is sent to loud speaker, so that can be sounded.
Another purpose of embodiments of the invention is to provide a kind of device of bass compensation, and described device comprises:
Separative element is used for the voice signal that receives being isolated low frequency signal and high-frequency signal, and described low frequency signal being sent to amplifying unit according to default loud speaker cut-off frequency, and described high-frequency signal is sent to the delay process unit;
Amplifying unit be used for described low frequency signal is amplified processing, and the low frequency signal that will amplify after processing sends to sampling unit;
Sampling unit according to default number of samples and sampling stepping amount, generates multistage harmonic signal to the low frequency signal sampling of amplifying after processing, and described multistage harmonic signal is sent to filter unit;
Filter unit is used for that described multistage harmonic wave is carried out filtering and processes, and keeps the top n frequency multiplication harmonic signal in the described low frequency signal, and described N is the integer greater than 1, and described top n frequency multiplication harmonic signal is sent to superpositing unit;
The delay process unit is used for described high-frequency signal is carried out delay process, and will sends to superpositing unit through the high-frequency signal of delay process;
Superpositing unit, being used for will be through the high-frequency signal of delay process and the described top n frequency multiplication harmonic signal outputting digital audio signal that superposes, and described digital audio and video signals is sent to D/A conversion unit;
D/A conversion unit is used for converting described digital audio and video signals to simulated audio signal and is sent to loud speaker, so that loud speaker can be sounded.
The embodiment of the invention is according to the cut-off frequency of loud speaker, isolate low frequency signal and high-frequency signal, low frequency signal has been processed low frequency signal by modes such as amplification, sampling, stacks, with the low frequency signal after processing and high-frequency signal stack, increased low frequency signal ratio in whole signal, signal after the whole processing is sent to loud speaker, makes loud speaker more give full expression to out the low frequency part of sound.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the realization flow figure of bass compensation method provided by the invention;
Fig. 3 is the multistage harmonic frequency signal performance plot that generates in the flow process of the present invention.
Fig. 4 is the modular structure figure of bass compensation device provided by the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Figure 1 shows that theory diagram of the present invention.
In practice, the loud speaker of TV and some electrical equipment is because spatial limitation, cut-off frequency is about 150HZ to 200HZ, loud speaker can't well reappear lower frequency, remove to drive loud speaker with these low-frequency sounds and do not have practical significance, force on the contrary loud speaker to make the scope that exceeds its ability and move, even make the HFS distortion.For example 150HZ is the loud speaker cut-off frequency, is 100HZ and need audio plays, and the low-frequency sound content that the present invention can't reappear loud speaker passes through to improve frequency multiplication to 200HZ, 300HZ or higher, makes it to be play.Because audio content is 8 degree sounds, according to psychoacoustic principle, people's ear and brain can be induced to think the content of having heard low-frequency sound.
The invention provides a kind of bass compensation method, described method is carried out by the bass compensation device, the method as shown in Figure 2, concrete steps comprise:
S101, the default loud speaker cut-off frequency of basis are isolated low frequency signal and high-frequency signal with the voice signal that receives;
Need to prove that take television set as example, the low-frequency cut-off frequency of loud speaker is different at the different TV loudspeaker cut-off frequency of 150HZ to 200HZ(), can't drive loud speaker for the low frequency part that is lower than cut-off frequency, even cause the HFS distortion.
Need to prove, at first need to know the cut-off frequency of loud speaker, the cut-off frequency of loud speaker is preset in the bass compensation device.
S102, described low frequency signal is amplified processing;
S103, according to default number of samples and sampling stepping amount, the low frequency signal sampling of amplifying after processing is generated multistage harmonic signal;
Need to prove, suppose that number of samples is 2
NIndividual, sampling stepping amount is M, and the frequency of low frequency signal is f, and the frequency representation of the first harmonic that sampling generates is
By controlling default number of samples and sampling stepping amount, just can control the frequency of multistage harmonic signal.
Need to prove that the multistage harmonic frequency signal characteristic that sampling generates as shown in Figure 3.
S104, the high fdrequency component of filtering described multistage harmonic signal keep the top n frequency multiplication harmonic signal in the described low frequency signal;
Need to prove that N is the positive integer greater than 1 here.
S105, described high-frequency signal is carried out delay process;
S106, will be through the high-frequency signal of delay process and described front N order harmonic signal stack, outputting digital audio signal;
S107, convert described digital audio and video signals to simulated audio signal and be sent to loud speaker, so that loud speaker can be sounded.
Optionally, the method for realization S101 specifically can comprise:
The voice signal that receives is filtered out frequency be higher than described default loud speaker cut-off frequency part, isolate low frequency signal, the voice signal that receives is filtered out frequency be lower than described default loud speaker cut-off frequency part, isolate high-frequency signal.
The invention provides a kind of bass compensation device, described bass compensation device specifically comprises as shown in Figure 4:
Separative element 21 is used for the voice signal that receives being isolated low frequency signal and high-frequency signal, and described low frequency signal being sent to amplifying unit 22 according to default loud speaker cut-off frequency, and described high-frequency signal is sent to delay process unit 25;
Amplifying unit 22 be used for described low frequency signal is amplified processing, and the low frequency signal that will amplify after processing sends to sampling unit 23;
Sampling unit 23 is used for the low frequency signal sampling of amplifying after processing being generated multistage harmonic signal, and described multistage harmonic signal being sent to filter unit 24 according to default number of samples and sampling stepping amount;
Filter unit 24, the high fdrequency component for filtering described multistage harmonic signal keeps the top n frequency multiplication harmonic signal in the described low frequency signal;
Delay process unit 25 is used for described high-frequency signal is carried out delay process and will send to through the high-frequency signal of delay process superpositing unit 26;
Superpositing unit 26, being used for will be through the high-frequency signal of delay process and the described top n frequency multiplication harmonic signal outputting digital audio signal that superposes, and described digital audio and video signals is sent to D/A conversion unit 27;
D/A conversion unit 27 is used for converting described digital audio and video signals to simulated audio signal and is sent to loud speaker, so that loud speaker can be sounded.
Optionally, above-mentioned separative element 21 specifically is used for:
The voice signal that receives is filtered out frequency be higher than described default loud speaker cut-off frequency part, isolate low frequency signal and send to amplifying unit, the voice signal that receives is filtered out frequency be lower than described default loud speaker cut-off frequency part, isolate high-frequency signal and send to the delay process unit.
One of ordinary skill in the art will appreciate that as the included modules of above-described embodiment is to divide according to function logic, but be not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional module also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Those of ordinary skills it is also understood that, realize that all or part of step in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be in being stored in bass compensation device read/write memory medium, described storage medium comprises ROM/RAM etc.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the method for a bass compensation is characterized in that, described method comprises:
According to default loud speaker cut-off frequency, the voice signal that receives is isolated low frequency signal and high-frequency signal;
Described low frequency signal is amplified processing;
According to default number of samples and sampling stepping amount, the low frequency signal sampling of amplifying after processing is generated multistage harmonic signal;
Described multistage harmonic wave is carried out filtering process, keep the top n frequency multiplication harmonic signal in the described low frequency signal, described N is the integer greater than 1;
Described high-frequency signal is carried out delay process;
Will be through high-frequency signal and the stack of described top n frequency multiplication harmonic signal of delay process, outputting digital audio signal;
Loud speaker converts described digital audio and video signals to simulated audio signal and is sent to loud speaker, so that can be sounded.
2. the method for claim 1 is characterized in that, the loud speaker cut-off frequency that described basis is default is isolated low frequency signal with the voice signal that receives and high-frequency signal is specially:
The voice signal that receives is filtered out frequency be higher than described default loud speaker cut-off frequency part, isolate low frequency signal, the voice signal that receives is filtered out frequency be lower than described default loud speaker cut-off frequency part, isolate high-frequency signal.
3. the device of a bass compensation is characterized in that, described device comprises:
Separative element is used for the voice signal that receives being isolated low frequency signal and high-frequency signal, and described low frequency signal being sent to amplifying unit according to default loud speaker cut-off frequency, and described high-frequency signal is sent to the delay process unit;
Amplifying unit be used for described low frequency signal is amplified processing, and the low frequency signal that will amplify after processing sends to sampling unit;
Sampling unit according to default number of samples and sampling stepping amount, generates multistage harmonic signal to the low frequency signal sampling of amplifying after processing, and described multistage harmonic signal is sent to filter unit;
Filter unit is used for that described multistage harmonic wave is carried out filtering and processes, and keeps the top n frequency multiplication harmonic signal in the described low frequency signal, and described N is the integer greater than 1, and described top n frequency multiplication harmonic signal is sent to superpositing unit;
The delay process unit is used for described high-frequency signal is carried out delay process, and will sends to superpositing unit through the high-frequency signal of delay process;
Superpositing unit, being used for will be through the high-frequency signal of delay process and the described top n frequency multiplication harmonic signal outputting digital audio signal that superposes, and described digital audio and video signals is sent to D/A conversion unit;
D/A conversion unit is used for converting described digital audio and video signals to simulated audio signal and is sent to loud speaker, so that loud speaker can be sounded.
4. bass compensation device as claimed in claim 3 is characterized in that, described separative element specifically is used for:
The voice signal that receives is filtered out frequency be higher than described default loud speaker cut-off frequency part, isolate low frequency signal and send to amplifying unit; The voice signal of described reception is filtered out frequency be lower than described default loud speaker cut-off frequency part, isolate high-frequency signal and send to the delay process unit.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103838970A (en) * | 2014-03-07 | 2014-06-04 | 武汉理工大学 | Deep-sea vessel dynamic positioning oriented high-precision real-time state estimation method and system |
| CN106328153A (en) * | 2016-08-24 | 2017-01-11 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
| CN110720121A (en) * | 2017-03-30 | 2020-01-21 | 伯斯有限公司 | Compensation and automatic gain control in active noise reduction devices |
| CN112511941A (en) * | 2020-12-01 | 2021-03-16 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112637741A (en) * | 2020-12-30 | 2021-04-09 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
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| CN1805612A (en) * | 2005-01-14 | 2006-07-19 | 三星电子株式会社 | Method and apparatus for audio bass enhancement |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Apparatus and method for processing audio signal |
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| US5930373A (en) * | 1997-04-04 | 1999-07-27 | K.S. Waves Ltd. | Method and system for enhancing quality of sound signal |
| CN1805612A (en) * | 2005-01-14 | 2006-07-19 | 三星电子株式会社 | Method and apparatus for audio bass enhancement |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Apparatus and method for processing audio signal |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103838970A (en) * | 2014-03-07 | 2014-06-04 | 武汉理工大学 | Deep-sea vessel dynamic positioning oriented high-precision real-time state estimation method and system |
| CN103838970B (en) * | 2014-03-07 | 2016-09-14 | 武汉理工大学 | Towards method for estimating state during the high-precision real of deep-sea dynamic positioning of vessels and system |
| CN106328153A (en) * | 2016-08-24 | 2017-01-11 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
| CN106328153B (en) * | 2016-08-24 | 2020-05-08 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
| CN110720121A (en) * | 2017-03-30 | 2020-01-21 | 伯斯有限公司 | Compensation and automatic gain control in active noise reduction devices |
| CN112511941A (en) * | 2020-12-01 | 2021-03-16 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112511941B (en) * | 2020-12-01 | 2023-06-13 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112637741A (en) * | 2020-12-30 | 2021-04-09 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
| CN112637741B (en) * | 2020-12-30 | 2023-03-10 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
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| CN102932710B (en) | 2015-06-03 |
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Effective date of registration: 20210713 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Development Zone, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |