CN108540886A - A kind of method for protecting hearing ability, system, storage device and bluetooth headset - Google Patents
A kind of method for protecting hearing ability, system, storage device and bluetooth headset Download PDFInfo
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- CN108540886A CN108540886A CN201810345557.7A CN201810345557A CN108540886A CN 108540886 A CN108540886 A CN 108540886A CN 201810345557 A CN201810345557 A CN 201810345557A CN 108540886 A CN108540886 A CN 108540886A
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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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
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention belongs to Audio Signal Processing technical field, a kind of method for protecting hearing ability, system, storage device and bluetooth headset are provided.In the method for protecting hearing ability, system, storage device and bluetooth headset; after carrying out overall loudness adjusting to digital audio and video signals; using dynamic range compression algorithm; the amplitude of digital audio and video signals is limited to less than audio intensity threshold; big signal may make to be pressed within a certain range; the purpose of protection hearing user is played, and can guarantee the details that also can clearly hear sound when amount of bass plays, helps to promote sound quality.Meanwhile the setting of dynamic range compression algorithm is avoided into the amplitude of audio signal by secondary change after carrying out overall loudness adjusting to digital audio and video signals, and lose hearing protection effect.
Description
Technical field
The invention belongs to Audio Signal Processing technical field more particularly to a kind of method for protecting hearing ability, system, storage devices
And bluetooth headset.
Background technology
If medical research shows that pleasant intensity of sound reaches 85dB, and continues 8 hours or more daily, it is easy to cause
Impaired hearing, and auricularis it is impaired after can not effect a radical cure.In the current 3C epoch, bluetooth headset is widely used, and is based on this, blue
It is necessary to have the function of hearing protection for tooth earphone.
In the prior art, the volume of bluetooth headset output is limited using analog volume control.Specifically, bluetooth
Earphone is handled audio data after receiving audio data from Bluetooth terminal equipment, passes through D/A converter later
(DAC) output is to loudspeaker after digital audio and video signals being converted into analog audio signal.In the process, pass through volume adjuster
(DAC Gain) adjusts the watt level of D/A converter output, when the amplitude of the analog audio signal of D/A converter output
When excessive, the discomfort of human ear is avoided by the reduction of volume, has the function that hearing protection.
But the method for this analog volume control is integrally to reduce the amplitude of analog audio signal, originally fainter sound
Frequency signal will be attenuated to obtain smaller, and the details of audio can not be presented to user, therefore user can lose the sophistication in sound quality,
This will become apparent from the music for pursuing details.
Invention content
The embodiment of the present invention is designed to provide a kind of method for protecting hearing ability, it is intended to solve the simulation of prior art use
Volume controlling technique can integrally reduce the amplitude of the analog audio signal in bluetooth headset, and the details of audio can not be presented to use
The problem of family.
The embodiment of the present invention is achieved in that a kind of method for protecting hearing ability, the described method comprises the following steps：
The audio data that Bluetooth terminal equipment is sent is handled into row decoding；
Data element overall loudness adjusting is carried out to the digital audio and video signals that decoding obtains；
Using DRC algorithms, the amplitude for limiting the digital audio and video signals after volume adjustment is less than audio intensity threshold；
Output is to loudspeaker after digital audio and video signals are converted into analog audio signal.
The another object of the embodiment of the present invention is to provide a kind of hearing protection system, the system comprises：
Data processing module, the audio data for being sent to Bluetooth terminal equipment are handled into row decoding；
Volume adjusting module, it is whole that the digital audio and video signals for being decoded to the data processing module carry out data element
Body volume adjustment；
Hearing protection module limits the digital audio and video signals of the volume adjusting module output for using DRC algorithms
Amplitude is less than audio intensity threshold；
D A switch module, for output after digital audio and video signals are converted into analog audio signal to loudspeaker.
The another object of the embodiment of the present invention is to provide a kind of storage device, and being stored with execution on the storage device refers to
It enables, it is described to execute instruction the step of method for protecting hearing ability as described above is realized when being executed by processor.
The another object of the embodiment of the present invention is to provide a kind of bluetooth headset, including loudspeaker and hearing protection system,
The hearing protection system is hearing protection system as described above.
In method for protecting hearing ability, system, storage device and bluetooth headset that the embodiment of the present invention proposes, to digital audio
After signal carries out overall loudness adjusting, using dynamic range compression algorithm, the amplitude of digital audio and video signals is limited to less than sound
Sound intensity threshold may make big signal to be pressed the purpose for playing protection hearing user within a certain range, and can guarantee bass
Amount also can clearly hear the details of sound when playing, help to promote sound quality.Meanwhile dynamic range compression algorithm being arranged right
After digital audio and video signals carry out overall loudness adjusting, the amplitude of audio signal is avoided by secondary change, and is lost to listen and be tried hard to keep
Shield acts on.
Description of the drawings
Fig. 1 is the flow chart for the method for protecting hearing ability that the embodiment of the present invention one provides；
Fig. 2 is that the flow chart of digital audio and video signals amplitude is adjusted using DRC algorithms in the embodiment of the present invention one；
Fig. 3 is the structure chart for the hearing protection system that the embodiment of the present invention three provides；
Fig. 4 is the structure chart of hearing protection module in the embodiment of the present invention three.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention protects the problems of hearing for bluetooth headset using analog volume control, it is proposed that one kind is listened
It tries hard to keep maintaining method.This method is after carrying out overall loudness adjusting to digital audio and video signals, using dynamic range compression
(Dynamic Range Compression, DRC) algorithm, intensity of sound threshold is limited to less than by the amplitude of digital audio and video signals
Value.It is described in detail below with reference to embodiment：
Embodiment one
The embodiment of the present invention one proposes a kind of method for protecting hearing ability.As shown in Figure 1, including the following steps：
S1：The audio data that Bluetooth terminal equipment is sent is handled into row decoding.
Wherein, Bluetooth terminal equipment can be the electronic equipments such as mobile phone, tablet computer, PC, be assisted based on bluetooth
View, audio data is sent by blueteeth network.The audio data can be the data such as music or the voice of number format coding.
S2：Data element overall loudness adjusting is carried out to the digital audio and video signals that decoding obtains, to assist audio to post-process
(such as:EQ balanced devices) volume adjustment.
S3：Using DRC algorithms, the amplitude for limiting the digital audio and video signals after volume adjustment is less than audio intensity threshold.
Wherein, audio intensity threshold can be default according to actual conditions, it is preferable that audio intensity threshold 85dB.
S4：Output is to loudspeaker after digital audio and video signals are converted into analog audio signal.
In embodiment one, the output amplitude of digital audio and video signals is dynamically adjusted using DRC algorithms, big signal can be suppressed
Within a certain range, make loudspeaker not distorsion, and can guarantee the details that also can clearly hear sound when amount of bass plays, help to carry
Sharp matter.Also, upon step s 2 by step S3 settings, and before step S 4, its object is to avoid audio signal
Amplitude is lost hearing protection effect by secondary change.
Further, as shown in Fig. 2, step S3 may include following steps again：
S301：Read the DRC parameters to prestore.
Wherein, DRC parameters refer to the parameter that DRC algorithms are applied to, and include at least threshold value (threshold), compression
Time (attack time), release time (release time).
Specifically, threshold value refers to the threshold value for needing to carry out digital audio and video signals compression processing, works as digital audio and video signals
Amplitude when reaching the threshold value, need to carry out it dynamic range compression processing, and bigger more than threshold value, processed model
Enclose more, and amplitude is not handled then less than the digital audio and video signals of the threshold value.
The threshold value needs the difference of the impedance of the loudspeaker according to playing audio signal and distinguishes setting.If for example, loudspeaker
Impedance be 16 ohm, audio intensity threshold 85dB, then threshold value be -15dB；If the impedance of loudspeaker is 32 ohm, sound is strong
Degree threshold value is 85dB, then threshold value is -10dB.
Since the impedance of the loudspeaker of playing audio signal differs, sound when broadcasting is not of uniform size, for example, 16 ohm of loudspeaker
The sound that sends out can be bigger than the sound that the loudspeaker of 32 Europe nurses are sent out, and therefore, the setting of threshold value is needed according to different products
It is allocated.
In practice, it when pre-setting threshold value, needs to carry out practical measurement using dB meter, measures common tool respectively
There are the loudspeaker of different impedances in the corresponding threshold value of audio intensity threshold (such as 85dB), establishes table, and not according to product
It adjusts together default.
Specifically, compression time refers to starting the reaction time that compression is suppressed to threshold value to digital audio and video signals；Release
Time refers to the reaction time that compressed digital audio and video signals are restored to script signal magnitude.If compression time is too small to lead
Signal transients noise is caused, if compression time too conference causes compression not live distorsion；If release time, too small meeting was so that compression is endless
Achievement discharges and leads to distorsion, if release time too conference causes not discharge for a long time, dynamic is deteriorated.Rationally setting compression time
And release time, it can be to avoid discomfort acoustically.
In the embodiment of the present invention, the range that compression time can be arranged is 0.02 millisecond~10 milliseconds；Release time can be arranged
Range be：1 millisecond~5000 milliseconds.
S302：Amplitude detection is carried out to the digital audio and video signals of input.
S303：Judge whether the amplitude of the digital audio and video signals of input reaches audio intensity threshold, is to then follow the steps
Otherwise S304 directly executes step S4.
S304：According to DRC parameters, gain is multiplied with the digital audio and video signals of input, obtains defeated by adaptive polo placement gain
The digital audio and video signals gone out.Step S4 is executed later.
Further, in order to reduce the signal wave elimination generated when the digital audio and video signals amplitude of input changes very fast,
In embodiment one, between step S304 and step S4, it can also include the steps of：
S305：Start anti-clipping control (Anti-Clip Control) algorithm in DRC algorithms, utilizes slope filter
Anti- slicing processing is carried out to the digital audio and video signals of output, so that signal wave elimination minimizes, script waveform is kept, avoids losing
Very.Later, in step s 4, digital audio and video signals refer to through anti-slicing treated signal.
Embodiment two
The embodiment of the present invention two proposes a kind of method for protecting hearing ability.What is different from the first embodiment is that before step S3,
It is further comprising the steps of：
S0：The hearing protection ON/OFF instruction that Bluetooth terminal equipment is sent is received, if the instruction of hearing protection ON/OFF is hearing
Instruction is opened in protection, then step S3 is executed after executing the step S2, is referred to if the instruction of hearing protection ON/OFF is hearing protection pass
It enables, then executes step S4 after executing the step S2.
Relative to embodiment one, in embodiment two, user can by the App programs in Bluetooth terminal equipment,
Come choose whether open hearing protection function, it is convenient for users.
Embodiment three
The embodiment of the present invention three proposes a kind of hearing protection system, as shown in figure 3, including：Data processing module 1 is used
It is handled into row decoding in the audio data sent to Bluetooth terminal equipment；Volume adjusting module 2, for data processing module 1
Decode obtained digital audio and video signals and carry out data element overall loudness adjusting, to assist audio post-processing (such as:EQ is balanced
Device) volume adjustment；Hearing protection module 3, for using DRC algorithms, the digital audio letter that limitation volume adjusting module 2 exports
Number amplitude be less than audio intensity threshold, which is preferably 85dB；D A switch module 4 is used for digital sound
Output is to loudspeaker after frequency signal is converted into analog audio signal.
In embodiment three, hearing protection module 3 dynamically adjusts the output amplitude of digital audio and video signals using DRC algorithms,
Sound also can be clearly heard when can be suppressed big signal within a certain range, make loudspeaker not distorsion, and can guarantee amount of bass broadcasting
Details, contribute to promoted sound quality.Also, hearing protection module 3 is arranged after volume adjusting module 2, and its object is to keep away
Exempt from the amplitude of audio signal by secondary change, and loses hearing protection effect.
Further, as shown in figure 4, hearing protection module 3 may include again：Reading submodule 31 prestores for reading
DRC parameters, it is defined as described above about DRC parameters, it does not repeat；Amplitude detection submodule 32, for the digital sound to input
Frequency signal carries out amplitude detection；Judging submodule 33, for judging whether the amplitude of the digital audio and video signals of input reaches sound
Intensity threshold；Submodule 34 is adjusted, for judging that the amplitude of the digital audio and video signals of input reaches sound when judging submodule 33
When intensity threshold, according to DRC parameters, gain is multiplied with the digital audio and video signals of input, is exported by adaptive polo placement gain
Digital audio and video signals, continued to execute later by D A switch module 4；D A switch module 4 is particularly used for sub when judging
When module 33 judges that the amplitude of the digital audio and video signals of input does not reach audio intensity threshold, digital audio and video signals are converted into
Output is to loudspeaker after analog audio signal.
Further, hearing protection module 3 may also include：Anti- clipping control submodule, for starting in DRC algorithms
Anti- clipping control (Anti-Clip Control) algorithm, the digital audio that regulator module 34 is exported using slope filter
Signal carries out anti-slicing processing, so that signal wave elimination minimizes, keeps script waveform, avoids being distorted.Later, D/A switch
Module 4 is by output after anti-clipping control submodule treated digital audio and video signals are converted into analog audio signal to loudspeaker.
Example IV
The embodiment of the present invention four proposes a kind of hearing protection system.Unlike embodiment three, in example IV, it is
System further includes：Command reception module, the hearing protection ON/OFF instruction for receiving the transmission of Bluetooth terminal equipment, if hearing protection
ON/OFF instruction is that instruction is opened in hearing protection, then starts hearing protection module 3 after volume adjusting module 2 is finished and continue to execute,
Instruction is closed if the instruction of hearing protection ON/OFF is hearing protection, volume adjusting module 2 starts D/A switch mould after being finished
Block 4 continues to execute.
Relative to embodiment three, in example IV, user can by the App programs in Bluetooth terminal equipment,
Choose whether to open hearing protection module 3, it is convenient for users.
Embodiment five
The embodiment of the present invention five proposes a kind of storage device, is stored with and executes instruction on the storage device, which refers to
Enable the step of method for protecting hearing ability as described in embodiment one or embodiment two is realized when being executed by processor.
Embodiment six
The embodiment of the present invention six proposes a kind of bluetooth headset, including loudspeaker and hearing protection system, the hearing protection
System is the hearing protection system as described in embodiment three or example IV, is not repeated.
In conclusion in method for protecting hearing ability proposed by the present invention, system, storage device and bluetooth headset, to number
After audio signal carries out overall loudness adjusting, using dynamic range compression algorithm, the amplitude of digital audio and video signals is limited in small
In audio intensity threshold, big signal may make to be pressed the purpose for playing protection hearing user within a certain range, and can guarantee
Amount of bass also can clearly hear the details of sound when playing, help to promote sound quality.Meanwhile dynamic range compression algorithm being arranged
After carrying out overall loudness adjusting to digital audio and video signals, the amplitude of audio signal is avoided by secondary change, and is lost and listened
Power protective effect.Further more, in the present invention, DRC parameters are rationally set, different according to loudspeaker impedances targetedly preset difference
Threshold value, enrich application range of products, and compression time and release time are rationally set, avoids causing user acoustically
Sense of discomfort.Finally, DRC algorithms start anti-clipping control function, can change very in the digital audio and video signals amplitude of input
When fast so that signal wave elimination minimizes, and keeps script waveform, avoids being distorted.
One of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with
Relevant hardware is controlled by program to complete, the program can in being stored in a computer read/write memory medium,
The storage medium, such as ROM/RAM, disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of method for protecting hearing ability, which is characterized in that the described method comprises the following steps：
The audio data that Bluetooth terminal equipment is sent is handled into row decoding；
Data element overall loudness adjusting is carried out to the digital audio and video signals that decoding obtains；
Using DRC algorithms, the amplitude for limiting the digital audio and video signals after volume adjustment is less than audio intensity threshold；
Output is to loudspeaker after digital audio and video signals are converted into analog audio signal.
2. method for protecting hearing ability as described in claim 1, which is characterized in that it is described to use DRC algorithms, after limiting volume adjustment
Digital audio and video signals amplitude be less than audio intensity threshold the step of include the following steps：
Read the DRC parameters to prestore；
Amplitude detection is carried out to the digital audio and video signals of input；
Judge whether the amplitude of the digital audio and video signals of the input reaches the audio intensity threshold, be then according to DRC parameters,
The gain is multiplied by adaptive polo placement gain with the digital audio and video signals of the input, the digital audio and video signals exported,
Described the step of being converted into exporting to loudspeaker after analog audio signal by digital audio and video signals is executed later, otherwise directly executes institute
State the step of being converted into exporting to loudspeaker after analog audio signal by digital audio and video signals.
3. method for protecting hearing ability as claimed in claim 2, which is characterized in that the method described according to DRC parameters, it is adaptive
Gain should be calculated, the gain is multiplied with the digital audio and video signals of the input, the step of the digital audio and video signals exported
Suddenly further include following and between described the step of being converted into exporting to loudspeaker after analog audio signal by digital audio and video signals
Step：
Start the anti-clipping control algorithm in DRC algorithms, is cut using slope filter is counter to the digital audio and video signals of output
Wave processing.
4. method for protecting hearing ability as described in any one of claims 1 to 3, which is characterized in that the audio intensity threshold is
85dB, the DRC parameters include at least threshold value, compression time, release time；
If the impedance of the loudspeaker is 16 ohm, the threshold value is -15dB, described if the impedance of the loudspeaker is 32 ohm
Threshold value is -10dB；
The setting range of the compression time is 0.02 millisecond~10 milliseconds；
The setting range of the release time is 1 millisecond~5000 milliseconds.
5. method for protecting hearing ability as described in any one of claims 1 to 3, which is characterized in that use DRC algorithms, limit described
The amplitude of digital audio and video signals after volume adjustment processed was less than before the step of audio intensity threshold, and the method further includes following
Step：
The hearing protection ON/OFF instruction that Bluetooth terminal equipment is sent is received, if hearing protection ON/OFF instruction is hearing protection
Instruction is opened, then after having executed the digital audio and video signals that described pair of decoding obtains and having carried out the step of data element overall loudness is adjusted
The use DRC algorithms are executed, the step of amplitude of the digital audio and video signals after volume adjustment is less than audio intensity threshold is limited,
If the hearing protection ON/OFF instruction is that instruction is closed in hearing protection, obtained digital audio letter is decoded having executed described pair
Number carry out data element overall loudness adjust the step of after execute it is described digital audio and video signals are converted into analog audio signal after
The step of exporting to loudspeaker.
6. a kind of hearing protection system, which is characterized in that the system comprises：
Data processing module, the audio data for being sent to Bluetooth terminal equipment are handled into row decoding；
Volume adjusting module, the digital audio and video signals for being decoded to the data processing module carry out data element entirety sound
Amount is adjusted；
Hearing protection module limits the amplitude of the digital audio and video signals of the volume adjusting module output for using DRC algorithms
Less than audio intensity threshold；
D A switch module, for output after digital audio and video signals are converted into analog audio signal to loudspeaker.
7. hearing protection system as claimed in claim 6, which is characterized in that the hearing protection module includes：
Reading submodule, for reading the DRC parameters to prestore；
Amplitude detection submodule carries out amplitude detection for the digital audio and video signals to input；
Judging submodule, for judging whether the amplitude of the digital audio and video signals of the input reaches the audio intensity threshold；
Submodule is adjusted, for judging that the amplitude of the digital audio and video signals of the input reaches the sound when the judging submodule
When sound intensity threshold, according to DRC parameters, gain is multiplied with the digital audio and video signals of input, obtains defeated by adaptive polo placement gain
The digital audio and video signals gone out；
The D/A switch mould is used to judge that the amplitude of the digital audio and video signals of the input does not reach when the judging submodule
To when the audio intensity threshold or after the adjusting submodule is finished, digital audio and video signals are converted into simulating
Output is to loudspeaker after audio signal.
8. hearing protection system as claimed in claim 6, which is characterized in that the system also includes：
Command reception module, the hearing protection ON/OFF instruction for receiving the transmission of Bluetooth terminal equipment, if the hearing protection
ON/OFF instruction be that instruction is opened in hearing protection, then the volume adjusting module start after being finished the hearing protection module after
Continuous to execute, if hearing protection ON/OFF instruction, which is hearing protection, closes instruction, the volume adjusting module opens after being finished
The D A switch module is moved to continue to execute.
9. a kind of storage device, which is characterized in that be stored with and execute instruction on the storage device, described execute instruction is handled
The step of device realizes method for protecting hearing ability as described in any one of claims 1 to 3 when executing.
10. a kind of bluetooth headset, including loudspeaker and hearing protection system, which is characterized in that the hearing protection system be as
Claim 6 to 8 any one of them hearing protection system.
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| CN201810345557.7A CN108540886A (en) | 2018-04-17 | 2018-04-17 | A kind of method for protecting hearing ability, system, storage device and bluetooth headset |
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| CN201810345557.7A CN108540886A (en) | 2018-04-17 | 2018-04-17 | A kind of method for protecting hearing ability, system, storage device and bluetooth headset |
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| CN112153533A (en) * | 2020-09-25 | 2020-12-29 | 展讯通信（上海）有限公司 | Method and device for eliminating sound breaking of audio signal, storage medium and terminal |
| CN112887857A (en) * | 2021-01-25 | 2021-06-01 | 湖南普奇水环境研究院有限公司 | Hearing protection method and system for eliminating reception noise |
| CN113730914A (en) * | 2021-09-07 | 2021-12-03 | 杭州雾联科技有限公司 | Audio adjusting method and device and computer readable storage medium |
| CN113852893A (en) * | 2020-06-28 | 2021-12-28 | 北京小米移动软件有限公司 | Data processing method and device, terminal and storage medium |
| CN114125658A (en) * | 2020-08-25 | 2022-03-01 | 上海艾为电子技术股份有限公司 | Dynamic range control circuit, audio processing chip and audio processing method thereof |
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| CN113852893A (en) * | 2020-06-28 | 2021-12-28 | 北京小米移动软件有限公司 | Data processing method and device, terminal and storage medium |
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