CN105246003A - Pure digital audio system equal loudness compensation method and system - Google Patents
Pure digital audio system equal loudness compensation method and system Download PDFInfo
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- CN105246003A CN105246003A CN201510694385.0A CN201510694385A CN105246003A CN 105246003 A CN105246003 A CN 105246003A CN 201510694385 A CN201510694385 A CN 201510694385A CN 105246003 A CN105246003 A CN 105246003A
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Abstract
The invention discloses a pure digital audio system equal loudness compensation method and system. An inherent volume control module and EQ module in a digital audio system are used. Through a volume configuration table, the volume control module and the EQ module are associated. According to the invention, under different volume output, detailed equal loudness compensation can be carried out according to the characteristics of a human ear; the human ear perceives the same degree of balance under low volume and high volume; and the method and the system have the advantages of being simple and reliable, low cost and high compensation accuracy.
Description
Technical field
The present invention relates to the loudness compensation method and systems such as a kind of fully digital audio system.
Background technology
Fully digital audio system refers to that the process of audio signal and amplification are all carried out at numeric field, does not need the cooperation of DA conversion equipment and analogue audio frequency power amplifier just can drive the audio system of loud speaker sounding.
Contour of equal loudness: people's ear is the nonlinear perception system of a set of complexity, its characteristic in sound intensity may be summarized to be 2 points:
1. concerning different frequency, auditory perceptual is allowed to arrive identical loudness, the power output (being presented as sound pressure level) needed is different, and usual low frequency and high-frequency ratio intermediate frequency need larger power output, are presented as that any loudness contour of Fig. 1 is all recessed curve.
2. along with the reduction of loudness, the perception of people's ear to low frequency and high frequency can be more and more weak, and when being presented as the low loudness as Fig. 1, loudness contour low frequency and HFS upwarp seriously.
EQ (Equalizer) module: conventional module in fully digital audio system, it can complete the adjustment of frequency response curve according to configuration parameter, such as it can be configured to promote 3db when frequency 1000HZ.
Volume control module: for controlling the module of volume in fully digital audio system, it by the change of configuration parameter, can control audio system power output size.
In existing fully digital audio system, operationally, its course of work is independently to above-mentioned two modules, between the two without any association.
In analogue audio frequency system, the loudness compensation (compensation result is shown in Fig. 2 (b)) such as usually use the Analogical Electronics of Fig. 2 (a) to carry out.In fully digital audio system, the link being input to output from source of sound is all straight numerical system, there is no analog circuit link, traditional analog compensation method cannot realize fully digital audio system etc. loudness compensation, and in order to ensure that amount of bass is identical with the degree of balance that louder volume situation servant ear perceives, the loudness compensation such as should to carry out to fully digital audio system.
Summary of the invention
Technical problem to be solved by this invention is, for above-mentioned the deficiencies in the prior art, provides the loudness compensation method and systems such as a kind of fully digital audio system.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the compensation method of a kind of fully digital audio system moderate amplitude; Setting up volume configuration table, when regulating volume, volume coefficient corresponding for volume level a certain in volume configuration table and the EQ compensating parameter that is used for loudness compensation functions such as realizing being configured to volume control module and EQ module, the loudness compensation such as realization respectively.
The method specific implementation process comprises the following steps:
1) according to every grade of volume power requirement of fully digital audio system requirements, the volume coefficient row in volume configuration table are made;
2) under every grade of volume, according to contour of equal loudness adjustment EQ parameter, make the loudness perception requirements such as final audio output effect meets, recording this EQ parameter is the EQ compensating parameter that this volume level is corresponding, repeats this step and the final EQ configuration row associated in formation volume configuration table;
3) the volume configuration table comprising volume coefficient row and EQ configuration row is made;
4), in volume adjusting process, while volume coefficient row are configured to volume control module, the EQ compensating parameter corresponding with a certain volume level is configured to EQ module, the loudness compensation such as realization; Concrete configuration mode is: if the EQ configuration parameter of fully digital audio system existing subscriber input, be then configured to EQ module after the EQ configuration parameter superposition described EQ compensating parameter and user inputted, otherwise directly this EQ compensating parameter be configured to EQ module.
Present invention also offers a kind of fully digital audio system moderate amplitude bucking-out system, comprising:
Volume configuration table: comprise volume level row, EQ configuration row and volume coefficient row; Described EQ configuration row are made up of EQ compensating parameter; Volume level in described volume level row and EQ configures the EQ compensating parameter in arranging, volume coefficient arrange in volume coefficient one_to_one corresponding;
Processing module: for volume configuration table is solidificated in fully digital audio systems soft ware or hardware, and in volume adjusting process, while volume coefficient row are configured to volume control module, the EQ compensating parameter corresponding with a certain volume level is configured to EQ module, the loudness compensation such as realization; Concrete configuration mode is: if the EQ configuration parameter of fully digital audio system existing subscriber input, be then configured to EQ module after the EQ configuration parameter superposition described EQ compensating parameter and user inputted, otherwise directly this EQ compensating parameter be configured to EQ module.
Compared with prior art, the beneficial effect that the present invention has is: volume control module and EQ module are associated by volume control table by the present invention, regulate by volume and EQ configuration are carried out interlock, to ensure when different volume exports to compare the loudness compensation such as careful according to people's ear characteristic, make amount of bass identical with the degree of balance that louder volume situation servant ear perceives; The present invention is simple and reliable, and cost is low, and compensation precision is high.
Accompanying drawing explanation
Fig. 1 is contour of equal loudness schematic diagram;
Fig. 2 (a) is the compensation principle figure in analogue audio frequency system; Fig. 2 (b) is the contour of equal loudness schematic diagram in analogue audio frequency system;
Fig. 3 is that one embodiment of the invention realizes schematic diagram.
Embodiment:
As shown in Figure 3, EQ module, volume control module are associated by volume configuration table by the present invention, low frequency and high frequency susceptibility are decayed serious characteristic when amount of bass for people's ear, with reference to contour of equal loudness, high frequency and low frequency are promoted in EQ configuration, the object of loudness compensation such as to reach, specifically comprise the steps:
1) according to every grade of volume power requirement of system requirements, the volume coefficient row in volume configuration table are made;
2) under every grade of volume, according to contour of equal loudness adjustment EQ parameter, make the loudness perception requirements such as final audio output effect meets, recording this EQ parameter is the EQ compensating parameter that this volume level is corresponding, repeats this step and the final EQ configuration row associated in formation volume configuration table;
3) the volume configuration table comprising described volume coefficient row and EQ configuration row is solidificated in systems soft ware or hardware;
4), in volume adjusting process, while volume coefficient is configured to volume control module, the EQ compensating parameter corresponding with a certain volume level is configured to EQ module, the loudness compensation such as realization; Concrete configuration mode is: if system has other intrinsic (user's input) EQ configuration parameter, be then configured to EQ module by after this EQ compensating parameter and the superposition of intrinsic EQ configuration parameter, otherwise directly this EQ compensating parameter be configured to EQ module.
Claims (3)
1. fully digital audio system moderate amplitude compensation method; It is characterized in that, make volume configuration table, when regulating volume, volume coefficient corresponding for volume level a certain in volume configuration table and the EQ compensating parameter that is used for loudness compensation functions such as realizing are configured to volume control module and EQ module, the loudness compensation such as realization respectively.
2. fully digital audio system moderate amplitude according to claim 1 compensation method, is characterized in that, the method specific implementation process comprises the following steps:
1) according to every grade of volume power requirement of fully digital audio system requirements, the volume coefficient row in volume configuration table are made;
2) under every grade of volume, according to contour of equal loudness adjustment EQ parameter, make the loudness perception requirements such as final audio output effect meets, recording this EQ parameter is the EQ compensating parameter that this volume level is corresponding, repeats this step and the final EQ configuration row associated in formation volume configuration table;
3) the volume configuration table comprising volume coefficient row and EQ configuration row is made;
4), in volume adjusting process, while volume coefficient row are configured to volume control module, the EQ compensating parameter corresponding with a certain volume level is configured to EQ module, the loudness compensation such as realization; Concrete configuration mode is: if the EQ configuration parameter of fully digital audio system existing subscriber input, be then configured to EQ module after the EQ configuration parameter superposition described EQ compensating parameter and user inputted, otherwise directly this EQ compensating parameter be configured to EQ module.
3. a fully digital audio system moderate amplitude bucking-out system, is characterized in that, comprising:
Volume configuration table: comprise volume level row, EQ configuration row and volume coefficient row; Described EQ configuration row are made up of EQ compensating parameter; Volume level in described volume level row and EQ configures the EQ compensating parameter in arranging, volume coefficient arrange in volume coefficient one_to_one corresponding;
Processing module: for volume configuration table is solidificated in fully digital audio systems soft ware or hardware, and in volume adjusting process, while volume coefficient row are configured to volume control module, the EQ compensating parameter corresponding with a certain volume level is configured to EQ module, the loudness compensation such as realization; Concrete configuration mode is: if the EQ configuration parameter of fully digital audio system existing subscriber input, be then configured to EQ module after the EQ configuration parameter superposition described EQ compensating parameter and user inputted, otherwise directly this EQ compensating parameter be configured to EQ module.
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| CN201510694385.0A CN105246003A (en) | 2015-10-22 | 2015-10-22 | Pure digital audio system equal loudness compensation method and system |
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| CN201510694385.0A CN105246003A (en) | 2015-10-22 | 2015-10-22 | Pure digital audio system equal loudness compensation method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105872753A (en) * | 2016-04-28 | 2016-08-17 | 深圳创维－Rgb电子有限公司 | Method and system for optimizing television sound effect and television |
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| CN101022269A (en) * | 2006-02-14 | 2007-08-22 | 逐点半导体（上海）有限公司 | Audio frequency control method and system |
| CN101277412A (en) * | 2008-03-31 | 2008-10-01 | 深圳创维数字技术股份有限公司 | Method and system for balancing set-top box output volume |
| US20150000990A1 (en) * | 2013-06-28 | 2015-01-01 | Caterpillar Inc. | Lubrication arrangement for a drive axle of a haul vehicle |
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| US20040199933A1 (en) * | 2003-04-04 | 2004-10-07 | Michael Ficco | System and method for volume equalization in channel receivable in a settop box adapted for use with television |
| CN1819635A (en) * | 2005-12-31 | 2006-08-16 | 北京广博数字电视科技有限公司 | Method for controlling frequency channel volume of digital TV-set |
| CN101022269A (en) * | 2006-02-14 | 2007-08-22 | 逐点半导体（上海）有限公司 | Audio frequency control method and system |
| CN101277412A (en) * | 2008-03-31 | 2008-10-01 | 深圳创维数字技术股份有限公司 | Method and system for balancing set-top box output volume |
| US20150000990A1 (en) * | 2013-06-28 | 2015-01-01 | Caterpillar Inc. | Lubrication arrangement for a drive axle of a haul vehicle |
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Application publication date: 20160113 |