CN102547523A - Volume adjusting method and device - Google Patents
Volume adjusting method and device Download PDFInfo
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- CN102547523A CN102547523A CN201110422573XA CN201110422573A CN102547523A CN 102547523 A CN102547523 A CN 102547523A CN 201110422573X A CN201110422573X A CN 201110422573XA CN 201110422573 A CN201110422573 A CN 201110422573A CN 102547523 A CN102547523 A CN 102547523A
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Abstract
The invention discloses a volume adjusting method, which is used for realizing adjustment of volume to improve the listening comfort. The method comprises the following steps of: performing audio decoding on an audio signal to obtain a decoded audio signal; performing digital-to-analog conversion on the decoded audio signal; outputting the audio signal; performing volume analysis on the output audio signal to obtain the value of the volume; judging whether the obtained value of the volume is in a preset volume range; and when the value of the volume is not in the preset volume range, adjusting the amplifying or reducing times of the audio signal in the digital-to-analog conversion. The invention further discloses a device for implementing the method.
Description
Technical field
The present invention relates to Audio Processing and built-in field, particularly relate to method and device that volume is regulated.
Background technology
Along with development of electronic technology, various electronic products are full of around people.People ask better audio visual effect most when enjoying amusement.
All there is the Audio Processing function in general electronic system, vehicle-carrying DVD for example, notebook computer, mobile phone, audio & video equipment, panel computer, TV, bluetooth earphone etc.In these systems when regular meeting runs into the volume that voice playing goes out little problem when big.For example; Play a plurality of mp3 (MPEG-1 layer 3MPEG-1 with computer; The 3rd layer of mark of audio frequency) during song, there are differences, if adopt identical signal amplification factor (audio signal gain) during broadcast owing to the volume of different songs when recording is different; Cause then hearing that the song volume that has is too little, and the song volume that has is too big.Sometimes unexpected big volume even there is damage in hearing, too little volume also makes and not person of modern times's meaning of music effect produces ill effect.When televising different channel, also there is similar problem, when switching TV channel, volume possibly occur and become too little or too big suddenly, cause the sense of hearing unhappy.
But be to regulate volume manually at present mostly, if little when big during volume, then need artificial frequent adjusting, operation is inconvenience very.
Summary of the invention
The embodiment of the invention provides a kind of method and device of regulating volume, is used to realize the adjustment of volume, to improve the comfort level of the sense of hearing.
A kind of volume adjusting method may further comprise the steps:
Audio signal is carried out audio decoder, obtain decoded audio signal;
Decoded audio signal is carried out digital-to-analogue conversion;
Output audio signal;
Audio signal to this output is carried out the volume analysis, obtains the value of volume;
Whether the value of the volume that judge to obtain is in preset volume range;
When the value of described volume is not in preset volume range, regulate in the said digital-to-analogue conversion the amplification of said audio signal or the multiple that dwindles.
A kind of device that is used for the volume adjusting comprises:
The audio decoder module is used for audio signal is carried out audio decoder;
D/A converter module is used for the audio signal that obtains behind the audio decoder is carried out digital-to-analogue conversion, and with the analog signal output after the digital-to-analogue conversion;
The volume analysis module is used for the value according to this analog signal volume of analog signal analysis of output; Whether the value of the volume that judge to obtain is in preset volume range; When the value of described volume was not in preset volume range, output volume adjusting signal to D/A converter module was also regulated in the digital-to-analogue conversion process the amplification of said audio signal or the multiple that dwindles.
In the embodiment of the invention audio signal of output is extracted or caught; And whether the volume of analyzing the audio signal of output surpass preset volume range, if surpass, then the volume of the audio signal of input regulated; Thereby realize the adjustment of volume, to improve the comfort level of the sense of hearing.
Description of drawings
Fig. 1 is a method flow diagram of regulating volume in the embodiment of the invention;
Fig. 2 A is the primary structure figure that installs in the embodiment of the invention;
Fig. 2 B is the preferred structure figure that installs in the embodiment of the invention;
Fig. 3 is the structure chart of embodiment of the invention middle pitch component analysis module;
Fig. 4-Fig. 7 is the detailed structure view of different implementation lower devices in the embodiment of the invention.
Embodiment
In the embodiment of the invention audio signal of output is extracted or caught; And whether the volume of analyzing the audio signal of output surpass preset volume range, if surpass, then the volume of the audio signal of input regulated; Thereby realize the adjustment of volume, to improve the comfort level of the sense of hearing.
Referring to Fig. 1, the method flow of regulating volume in the present embodiment is following:
Step 101: audio signal is carried out audio decoder, obtain decoded audio signal;
Step 102: decoded audio signal is carried out digital-to-analogue conversion;
Step 103: output audio signal;
Step 104: the audio signal to this output is carried out the volume analysis, obtains the value of volume;
Step 105: whether the value of the volume that judge to obtain is in preset volume range;
Step 106: when the value of described volume is not in preset volume range, regulate in the said digital-to-analogue conversion to the amplification of said audio signal or the multiple that dwindles.
When in preset volume range, then do not regulate, by original tactful output audio signal.
Wherein, step 101 has multiple implementation: like mode one: obtain the audio signal after audio power amplifies, and carry out the volume analysis through the audio signal to this output, obtain the value of volume.Mode two: obtain the audio signal of output through audio receiver, and carry out the volume analysis, obtain the value of volume through audio signal to this output.When employing mode two, after obtaining the audio signal of output, the audio signal of the output that obtains is carried out analog-to-digital conversion through audio receiver, then the audio signal after the analog-to-digital conversion is carried out the volume analysis, obtain the value of volume.Mode three: obtain the audio signal after analog gain is controlled, and carry out the volume analysis, obtain the value of volume through audio signal to this output.
Above volume adjustment process can be realized by device, introduces in the face of the internal structure of device down.
Existing apparatus for processing audio comprises: audio frequency read module, audio decoder module, D/A converter module (DAC), analog gain control module, audio-frequency power amplifier and audio output device.
The audio frequency read module is used for reading audio file or audio signal from memory.This memory can be disk or buffer memory etc., and the source of audio file or audio signal can be a wired or wireless network etc.Audio signal can be the audio-frequency unit in the vision signal.The audio decoder module is used for audio signal is decoded.Because the audio signal that reads mostly at present is a digital signal, then D/A converter module is used for decoded audio signal is converted into the audio signal of simulation.The analog gain control module is used for regulating the set volume of button according to volume the audio signal of simulation is carried out analog gain control, promptly multiply by corresponding analog gain signal.Audio-frequency power amplifier is used for the signal of analog gain control module output is carried out power amplification.Audio output device is used for the audio signal after power output is amplified, and audio output device can be earphone or loud speaker etc.
Present embodiment has mainly increased the volume analysis module on this basis, and shown in Fig. 2 A, the device that is used to regulate volume comprises: audio frequency acquisition module 200 and volume analysis module 202.
Audio frequency acquisition module 200 is used to the audio signal that obtains to import.
The audio signal that volume analysis module 202 is used for obtaining to export and the value of this audio signal volume; Whether the value of the volume that judge to obtain is in preset volume range; When not in preset volume range,, the volume of the audio signal of the input of audio frequency acquisition module 200 acquisitions is regulated according to the volume of the audio signal of output direction to volume range.
Preferable, referring to Fig. 2 B:
D/A converter module 204 is used for the audio signal that obtains behind the audio decoder is carried out digital-to-analogue conversion, and with the analog signal output after the digital-to-analogue conversion;
Concrete:
Audio frequency acquisition module 200 comprises: audio frequency read module 201, audio decoder module 203, D/A converter module (DAC) 204, analog gain control module 205.Said device also comprises: audio-frequency power amplifier 206 and audio output device 207.Series connection in order between each module, its function as previously mentioned.
To mode one, volume analysis module 202 is connected with the output of audio-frequency power amplifier 206, and obtains the audio signal (analog signal) of output from audio-frequency power amplifier 206.
To mode two, audio receiver 208 is used to obtain the audio signal that audio output device 207 is exported.The audio output device 207 here is preferably loud speaker, and the effect of earphone is not very desirable.This audio receiver 208 can be the equipment that microphone etc. can convert sound wave into the signal of telecommunication.Volume analysis module 202 is connected with the output of audio receiver 208, and obtains the audio signal (analog signal) of output from audio receiver 208.
Perhaps, said device also comprises: analog to digital converter 209, be connected with the output of audio receiver 208, and be used for the audio signal of audio receiver 208 outputs is carried out analog-to-digital conversion, obtain the audio signal of numeral.Volume analysis module 202 is connected with the output of analog to digital converter 209, and obtains the audio signal (digital signal) of output from analog to digital converter 209.
To mode three, volume analysis module 202 is connected with the output of analog gain control module 205, and obtains the audio signal (analog signal) of output from analog gain control module 205.
When the audio signal that volume analysis module 202 obtains was digital signal, volume analysis module 202 was a programmable logic device, for example is FPGA (Field Programmable Gate Array, field programmable gate array) etc.Volume analysis module 202 can obtain the value of the bit of expression volume in the digital audio and video signals through software mode, thereby confirms the value of volume.
When the audio signal that volume analysis module 202 obtains was analog signal, volume analysis module 202 comprised: first comparator 301 and second comparator 302, and referring to shown in Figure 3.First comparator 301 is used for the volume value of audio signal is compared with the first preset voltage threshold VR1, and through comparative result A volume is regulated; Second comparator 302 is used for the volume value of audio signal is compared with the second preset voltage threshold VR2, and through comparative result B volume is regulated; Wherein, the scope of first voltage threshold and second voltage threshold formation is said preset volume range.For example, the first voltage threshold VR1 is less than the second voltage threshold VR2, if the volume value of the audio signal of output then need be heightened the volume value of the audio signal of output less than the first voltage threshold VR1; If the volume value of the audio signal of output then need be turned down the volume value of the audio signal of output greater than the second voltage threshold VR2.
The output of volume analysis module 202 is connected with D/A converter module 204, regulates in the volume of audio signal being carried out in the digital-to-analogue conversion process the audio signal of input.If D/A converter module 204 is a resistor-type, then volume analysis module 202 is through the reference voltage level of regulating D/A converter module 204 or the size that current mirror mirror image ratio is regulated D/A converter module 204 output resistances, thereby regulates the volume of audio signal.Make volume after the adjusting more near preset volume range or be positioned at preset volume range.For example; A plurality of branch roads are arranged in the D/A converter module 204, and the reference voltage level of each branch road or current mirror are different, and volume analysis module 202 is to each branch road output control signal of D/A converter module 204; Part branch road turning part branch road is broken off, thus the resistance of control output.If D/A converter module 204 is a capacitor type, then volume analysis module 202 is regulated the gain of D/A converter module 204 outputs through the ratio of the coupling capacitance of adjusting D/A converter module 204, thereby regulates the volume of audio signal.Make volume after the adjusting more near preset volume range or be positioned at preset volume range.
But the mode one, two of present embodiment sound intermediate frequency signal acquisition behavior and three and volume regulative mode combination in any.For example, the assembled scheme of mode two and volume regulative mode is referring to Fig. 4 and shown in Figure 5.The assembled scheme of mode one and volume regulative mode is referring to shown in Figure 6.The assembled scheme of mode three and volume regulative mode is referring to shown in Figure 7.
In the embodiment of the invention audio signal of output is extracted or caught; And whether the volume of analyzing the audio signal of output surpass preset volume range, if surpass, then the volume of the audio signal of input regulated; Thereby realize the adjustment of volume, to improve the comfort level of the sense of hearing.The audio signal that obtains output in the embodiment of the invention has number of ways, and the audio signal of carrying out the input of volume adjusting also has number of ways, is applicable to the needs of several scenes.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (15)
1. a volume adjusting method is characterized in that, may further comprise the steps:
Audio signal is carried out audio decoder, obtain decoded audio signal;
Decoded audio signal is carried out digital-to-analogue conversion, and output audio signal;
It is characterized in that this method also comprises:
Audio signal to this output is carried out the volume analysis, obtains the value of volume;
Whether the value of the volume that judge to obtain is in preset volume range;
When the value of described volume is not in preset volume range, regulate in the said digital-to-analogue conversion the amplification of said audio signal or the multiple that dwindles.
2. the method for claim 1 is characterized in that, obtains the audio signal of output through audio receiver, and carries out the volume analysis through the audio signal to this output, and the step that obtains the value of volume comprises:
Obtain the audio signal of output through audio receiver;
Audio signal to the output that obtains is carried out analog-to-digital conversion;
Audio signal after the analog-to-digital conversion is carried out the volume analysis, obtain the value of volume.
3. method as claimed in claim 2 is characterized in that, the audio signal after the analog-to-digital conversion is carried out the volume analysis, and the step that obtains the value of volume comprises: the value that obtains the bit of expression volume in the digital audio and video signals.
4. the method for claim 1 is characterized in that, the size of regulating output resistance in the digital-to-analogue conversion process through reference voltage level or the current mirror mirror image ratio of regulating in the digital-to-analogue conversion process, thus regulate the volume of audio signal; Perhaps
Ratio through regulating the coupling capacitance in the digital-to-analogue conversion process is regulated the gain of exporting in the digital-to-analogue conversion process, thereby regulates the volume of audio signal.
5. the method for claim 1 is characterized in that, the method for said adjusting volume comprises that also the audio signal after the logarithmic mode conversion carries out the audio frequency simulation gain, and the audio signal of said output is the audio signal after the audio frequency simulation gain.
6. method as claimed in claim 5 is characterized in that, the method for said adjusting volume is carried out power amplification after also comprising the audio frequency letter to the audio frequency simulation gain, and the audio signal of said output is the audio signal after audio frequency simulation gain and the process power amplification.
7. method as claimed in claim 6; It is characterized in that; The method of said adjusting volume also comprises carries out power amplification behind the audio frequency letter to audio frequency simulation gain and by audio output device output, and the audio signal of said output is for through after audio frequency simulation gain and the power amplification and by the audio signal of audio output device output.
8. one kind is used for the device that volume is regulated, and comprising:
The audio decoder module is used for audio signal is carried out audio decoder;
D/A converter module is used for the audio signal that obtains behind the audio decoder is carried out digital-to-analogue conversion, and with the analog signal output after the digital-to-analogue conversion;
It is characterized in that this device also comprises:
The volume analysis module is used for the value according to this analog signal volume of analog signal analysis of output; Whether the value of the volume that judge to obtain is in preset volume range; When the value of described volume was not in preset volume range, output volume adjusting signal to D/A converter module was also regulated in the digital-to-analogue conversion process the amplification of said audio signal or the multiple that dwindles.
9. device as claimed in claim 8 is characterized in that, also comprises: analog to digital converter between audio receiver and volume analysis module, is used for the audio signal of audio receiver output is carried out analog-to-digital conversion, and exports to the volume analysis module.
10. device as claimed in claim 9 is characterized in that, the volume analysis module obtains the value of the bit of expression volume in the digital audio and video signals.
11. device as claimed in claim 8 is characterized in that, D/A converter module is a resistor-type; The volume analysis module is through the reference voltage level of regulating D/A converter module or the size that current mirror mirror image ratio is regulated the D/A converter module output resistance, thus the volume of adjusting audio signal;
D/A converter module is a capacitor type; The volume analysis module is regulated the gain of D/A converter module output through the ratio of the coupling capacitance of adjusting D/A converter module, thereby regulates the volume of audio signal.
12. device as claimed in claim 8 is characterized in that, also comprises: the analog gain control module, the audio signal that is used for after logarithmic mode is changed is carried out the audio frequency simulation gain, and the audio signal of said output is the audio signal after the audio frequency simulation gain.
13. device as claimed in claim 12; It is characterized in that; Also comprise: audio-frequency power amplifier, be used for carrying out power amplification behind the audio frequency letter to the audio frequency simulation gain, the audio signal of said output is the audio signal after audio frequency simulation gain and the process power amplification.
14. device as claimed in claim 13; It is characterized in that; Also comprise: audio output device also is used for carrying out power amplification and output behind the audio frequency letter to audio frequency simulation gain, and the audio signal of said output is for through after audio frequency simulation gain and the power amplification and by the audio signal of audio output device output.
15., it is characterized in that when the audio signal that said volume analysis module obtains was digital signal, said volume analysis module was a programmable logic device like each described device in the claim 8 to 11; Perhaps
When the audio signal that said volume analysis module obtains was analog signal, said volume analysis module comprised: first comparator and second comparator; First comparator is used for the volume value of audio signal is compared with the first preset voltage threshold, and through comparative result volume is regulated; Second comparator is used for the volume value of audio signal is compared with the second preset voltage threshold, and through comparative result volume is regulated; Wherein, the scope of first voltage threshold and second voltage threshold formation is said preset volume range.
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| CN103633950A (en) * | 2013-12-06 | 2014-03-12 | 广东好帮手电子科技股份有限公司 | Power amplifier control device and power amplifier control method of car-mounted multimedia device |
| CN103841492A (en) * | 2012-11-20 | 2014-06-04 | 联想(北京)有限公司 | Output method of audio signal and apparatus |
| CN103916797A (en) * | 2014-04-04 | 2014-07-09 | 安徽森力汽车电子有限公司 | Vehicle-mounted audible device |
| CN107680612A (en) * | 2017-10-27 | 2018-02-09 | 深圳市共进电子股份有限公司 | audio optimization unit and network camera |
| CN110470935A (en) * | 2019-09-18 | 2019-11-19 | 广州小鹏汽车科技有限公司 | A kind of vehicle load measurement system, measurement method and vehicle |
| CN111261194A (en) * | 2020-04-29 | 2020-06-09 | 浙江百应科技有限公司 | Volume analysis method based on PCM technology |
| CN111508520A (en) * | 2020-04-01 | 2020-08-07 | 成都德芯数字科技股份有限公司 | Audio gain control method and device, broadcasting terminal and storage medium |
| CN114816312A (en) * | 2021-01-18 | 2022-07-29 | 博泰车联网(南京)有限公司 | Audio data processing method and device |
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| CN103841492A (en) * | 2012-11-20 | 2014-06-04 | 联想(北京)有限公司 | Output method of audio signal and apparatus |
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| CN114816312A (en) * | 2021-01-18 | 2022-07-29 | 博泰车联网(南京)有限公司 | Audio data processing method and device |
| CN114816312B (en) * | 2021-01-18 | 2024-08-30 | 博泰车联网(南京)有限公司 | Audio data processing method and device |
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Application publication date: 20120704 |