CN103414443B - Automatic volume control method and automatic volume control system - Google Patents
Automatic volume control method and automatic volume control system Download PDFInfo
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Abstract
The invention relates to an automatic volume control method. The automatic volume control method comprises an input audio volume comparison step, an audio output step, a volume decrease step and a volume increase step. In the input audio volume comparison step, an input audio volume is compared with a preset volume range in real time within preset detection time, and whether the input audio volume is kept within the preset volume range is judged; if the input audio volume is kept within the preset volume range, the audio output step is executed; if the input audio volume is kept higher than the maximum volume of the preset volume range, the volume decrease step is executed; if the input audio volume is kept lower than the minimum volume of the preset volume range, the volume increase step is executed. In the audio output step, the input audio is output directly. In the volume decrease step, the input audio volume is gradually reduced to a target audio volume in a preset decrease time period. In the volume increase step, the input audio volume is gradually increased to a target audio volume in a preset increase time period. The automatic volume control method can reduce output audio noise and optimize the tone quality of output audio. The invention further relates to an automatic volume control system.
Description
Technical field
The present invention relates to a kind of volume automatic control method and Automatic control of sound volume system.
Background technology
At present, typically using constant gain factor set in advance, the volume of input audio frequency is adjusted, for example, if
The volume of input audio frequency is less than threshold value, then increased the volume of this input audio frequency with above-mentioned gain factor, inputs audio volume wink
Between be changed to target volume, can produce a large amount of noises, reduce the tonequality of output audio frequency.
In addition, this kind of mode be applied to not ideal enough during the audio volume adjusting multiple sources, for example, if using this kind of mode
Audio volume from mike and the audio volume from dvd are adjusted, if the audio volume of mike is much smaller than dvd
Audio volume, then in the mixing sound finally modulating, the volume of corresponding microphone audio still can be much smaller than corresponding dvd
The volume of audio frequency, therefore, for making two kinds of wave volumes coordinate, generally require manually to adjust the volume of mike and the sound of dvd
Amount, wastes time and energy, and adjusts inaccurate.
Content of the invention
For the deficiencies in the prior art, the purpose of the present invention is intended to provide a kind of volume automatic control method and volume
Automatic control system, it can reduce output audio noise, optimizes the tonequality of output audio frequency.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of volume automatic control method, it comprises the following steps:
Input audio volume comparison step: audio volume and default volume will be inputted in default detection time in real time
Scope is compared, and judges to input whether audio volume is maintained in volume range, when input audio volume is maintained at volume model
When enclosing interior, then execute audio output step；When inputting the max volume that audio volume is remained above volume range, then execute sound
Amount attenuation step；When inputting the minimal volume that audio volume remains less than volume range, then execute volume gain step；
Audio output step: directly by this input audio output；
Volume attenuation step: in default die-away time section, input audio volume is gradually decayed to target audio frequency sound
Amount；Volume attenuation step includes following sub-step:
Volume attenuation comparison step: input audio volume is compared with default one-level volume threshold, wherein, one-level
Volume threshold is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold, holds
Row one-level volume attenuation step；When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation steps；
One-level volume attenuation step: audio volume will be inputted with one-level attenuation quotient gradually in default die-away time section
Decay to target audio volume, die-away time section is designated as t, input audio volume is designated as d1, and target audio volume is designated as d2, one
Level attenuation quotient is designated as-k1, and wherein, t, d1, d2 and k1 are positive number, then each parameter of this step meets relationship below: d2=-
k1*t+d1；And
Two grades of volume attenuation steps: audio volume will be inputted in default die-away time section with two grades of attenuation quotients gradually
Decay to target audio volume, die-away time section be designated as t, input audio volume is designated as d1, target audio volume is designated as d3,
Two grades of attenuation quotients are designated as-k2, and wherein, t, d1, d3 and k2 are positive number, and k2 is more than k1, then each parameter of this step meets
Relationship below: d3=-k2*t+d1；And
Volume gain step: will input in default gain time section audio volume gradually gain to target audio frequency sound
Amount；
Wherein, above-mentioned target audio volume is in above-mentioned volume range.
Further, volume gain step includes following sub-step:
Volume gain comparison step: input audio volume is compared with default two grades of volume threshold, wherein, two grades
Volume threshold is less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold, holds
Row one-level volume gain step；When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain steps；
One-level volume gain step: audio volume will be inputted with one step gain coefficient gradually in default gain time section
Gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is designated as
D2 ', one step gain coefficient is designated as k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then above-mentioned each parameter meets following relation
Formula: d2 '=k1 ' * t '+d1 '；And
Two grades of volume gain steps: audio volume will be inputted in default gain time section with two stage gain coefficients gradually
Gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is designated as
D3 ', two stage gain coefficients are designated as k2 ', wherein, t ', d1 ', d3 ' and k2 ' are positive number, and k2 ' is more than k1 ', then this step
Each parameter meets relationship below: d3 '=k2 ' * t '+d1 '.
The invention still further relates to technical scheme below:
A kind of Automatic control of sound volume system, it includes with lower module:
Input audio volume comparison module, for will input in real time in default detection time audio volume with default
Volume range is compared, and judges to input whether audio volume is maintained in volume range, when input audio volume is maintained at sound
When in the range of amount, then execute dio Output Modules；When inputting the max volume that audio volume is remained above volume range, then hold
Row volume attenuation module；When inputting the minimal volume that audio volume remains less than volume range, then execute volume gain module；
Dio Output Modules, for directly by this input audio output；
Volume attenuation module, for gradually decaying to target audio frequency by input audio volume in default die-away time section
Volume；Volume attenuation module includes following submodule:
Volume attenuation comparison module, for input audio volume is compared with default one-level volume threshold, wherein,
One-level volume threshold is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold
When, execute one-level volume attenuation module；When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation moulds
Block；
One-level volume attenuation module, for will input in default die-away time section audio volume with one-level attenuation quotient by
Degradation reduces to target audio volume, and die-away time section is designated as t, and input audio volume is designated as d1, and target audio volume is designated as d2,
One-level attenuation quotient is designated as-k1, and wherein, t, d1, d2 and k1 are positive number, then each parameter of this step meets relationship below: d2
=-k1*t+d1；And
Two grades of volume attenuation modules, for will input audio volume with two grades of attenuation quotients in default die-away time section
Gradually decay to target audio volume, die-away time section is designated as t, input audio volume is designated as d1, target audio volume is remembered
For d3, two grades of attenuation quotients are designated as-k2, and wherein, t, d1, d3 and k2 are positive number, and k2 is more than k1, then each parameter of this step
Meet relationship below: d3=-k2*t+d1；And
Volume gain module, for will input in default gain time section audio volume gradually gain to target audio frequency
Volume；
Wherein, above-mentioned target audio volume is in above-mentioned volume range.
Further, volume gain module includes following submodule:
Volume gain comparison module, for input audio volume is compared with default two grades of volume threshold, wherein,
Two grades of volume threshold are less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold
When, execute one-level volume gain module；When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain moulds
Block；
One-level volume gain module, for will input audio volume with one step gain coefficient in default gain time section
Gradually gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is remembered
For d2 ', one step gain coefficient is designated as k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then above-mentioned each parameter meets with ShiShimonoseki
It is formula: d2 '=k1 ' * t '+d1 '；And
Two grades of volume gain modules, for will input audio volume with two stage gain coefficients in default gain time section
Gradually gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is remembered
For d3 ', two stage gain coefficients are designated as k2 ', and wherein, t ', d1 ', d3 ' and k2 ' are positive number, and k2 ' is more than k1 ', then this step
Each parameter meet relationship below: d3 '=k2 ' * t '+d1 '.
Beneficial effects of the present invention are as follows:
1st, foregoing invention judges whether input audio volume keeps one of which stabilization result in default detection time
Just execute next step, can avoid producing the execution of mistake due to erroneous judgement, thereby may be ensured that regulation stability.
2nd, gradually decay or gain volume in present invention die-away time section or gain time section, can avoid producing noise, from
And optimize the tonequality of output audio frequency.
3rd, the present invention according to input audio volume different range with the attenuation quotient of different stage size to input audio frequency
Volume is decayed, thus can solve the problems, such as suddenly big or suddenly small, for example, when the music that dvd is play is much larger than the sound of mike
During sound, if with traditional volume control mode, the microphone voice after process still can be more much smaller than the music that dvd is play,
Often need to manually adjust microphone voice or dvd volume of music to make both volume couplings, bother very much, waste time and energy, and this
Invention can adjust the music that microphone voice is play with dvd in rational volume range automatically, so that after mixing
Sound more harmonious, tonequality is more preferably.
4th, the present invention controls volume by software, and the circuit that relatively conventional utilization electronic component is constituted controls volume, this
Bright not only can greatly reduce cost, and applied range, do not limited by device space volume.
Brief description
Fig. 1 is the flow chart of the better embodiment of volume automatic control method of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further:
Refer to Fig. 1, the present invention relates to a kind of volume automatic control method, its better embodiment comprises the following steps:
Input audio volume comparison step: audio volume and default volume will be inputted in default detection time in real time
Scope is compared, and judges to input whether audio volume is maintained in volume range, if input audio volume is maintained at volume model
In enclosing, then execute audio output step；If input audio volume is remained above the max volume of volume range, execution volume declines
Subtract step；If input audio volume remains less than the minimal volume of volume range, execute volume gain step.
Judge whether input audio volume keeps one of which stabilization result just to execute next in default detection time
Step, can avoid producing the execution of mistake due to erroneous judgement, thereby may be ensured that regulation stability.
Audio output step: directly by this input audio output.
Volume attenuation step: in default die-away time section, input audio volume is gradually decayed to target audio frequency sound
Amount, this target audio volume is the volume exporting audio frequency；Hinge structure moment decays to output by inputting audio volume
Audio volume, this step gradually decays volume in die-away time section, can avoid producing noise, thus optimizing the sound of output audio frequency
Matter.Preferably, this step includes following sub-step:
Volume attenuation comparison step: input audio volume is compared with default one-level volume threshold, wherein, one-level
Volume threshold is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold, holds
Row one-level volume attenuation step；When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation steps；
One-level volume attenuation step: audio volume will be inputted with one-level attenuation quotient gradually in default die-away time section
Decay to target audio volume, if die-away time section is t, input audio volume is d1, and target audio volume is d2, and one-level decays
Coefficient is-k1, and wherein, t, d1, d2 and k1 are positive number, then each parameter of this step meets relationship below: d2=-k1*t+d1；
And
Two grades of volume attenuation steps: audio volume will be inputted in default die-away time section with two grades of attenuation quotients gradually
Decay to target audio volume, die-away time section is t, input audio volume is d1, the audio volume of bidding is d3, two grades of decay
Coefficient is-k2, and wherein, t, d1, d3 and k2 are positive number, then each parameter of this step meets relationship below: d3=-k2*t+
d1.
The present invention according to input audio volume different range with the attenuation quotient of different stage size to input audio frequency sound
Amount is decayed, thus can solve the problems, such as suddenly big or suddenly small, for example, when the music that dvd is play is much larger than the sound of mike
When, if with traditional volume control mode, the microphone voice after process still can be more much smaller than the music that dvd is play, past
To make both volume couplings toward microphone voice or dvd volume of music need to be manually adjusted, to bother very much, waste time and energy, and this
Bright can automatically the music that microphone voice and dvd are play be adjusted in rational volume range, so that mixed
Sound is more harmonious, and tonequality is more preferably.
And
Volume gain step: will input in default gain time section audio volume gradually gain to target audio frequency sound
Amount；Hinge structure moment will input audio volume gain to exporting audio volume, this step in gain time section gradually
Gain volume, can avoid producing noise, thus optimizing the tonequality of output audio frequency.Preferably, this step includes following sub-step:
Volume gain comparison step: input audio volume is compared with default two grades of volume threshold, wherein, two grades
Volume threshold is less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold, holds
Row one-level volume gain step；When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain steps；
One-level volume gain step: audio volume will be inputted with one step gain coefficient gradually in default gain time section
Gain is to target audio volume, if gain time section is t ', input audio volume is d1 ', and target audio volume is d2 ', one-level
Gain coefficient is k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then above-mentioned each parameter meets relationship below: d2 '=
k1’*t’+d1’.And
Two grades of volume gain steps: audio volume will be inputted in default gain time section with two stage gain coefficients gradually
Gain is to target audio volume, if gain time section is t ', input audio volume is d1 ', and target audio volume is d3 ', two grades
Gain coefficient is k2 ', and wherein, t ', d1 ', d3 ' and k2 ' are positive number, then each parameter of this step meets relationship below: d3 '
=k2 ' * t '+d1 '.
Above-mentioned demarcation interval is carried out only for convenience of description with one-level volume threshold, in other embodiment, also can will be greater than
State the scope of max volume and multiple subintervals be divided into by multistage volume threshold, interval more at most to the correction of volume more
Precisely, principle is same as described above, repeats no more, in the same manner, also can be by multistage volume for the scope less than above-mentioned minimal volume
Threshold value carries out being divided into multiple subintervals.
The invention still further relates to a kind of Automatic control of sound volume system, its better embodiment includes:
Input audio volume comparison module, for will input in real time in default detection time audio volume with default
Volume range is compared, and judges to input whether audio volume is maintained in volume range, if input audio volume is maintained at sound
In the range of amount, then execute dio Output Modules；If input audio volume is remained above the max volume of volume range, execute sound
Amount attenuation module；If input audio volume remains less than the minimal volume of volume range, execute volume gain module.
Dio Output Modules, for directly by this input audio output.
Volume attenuation module, for gradually decaying to target audio frequency by input audio volume in default die-away time section
Volume, this target audio volume is the volume exporting audio frequency；Preferably, this step includes following submodule；
Volume attenuation comparison module, for input audio volume is compared with default one-level volume threshold, wherein,
One-level volume threshold is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold
When, execute one-level volume attenuation module；When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation moulds
Block；
One-level volume attenuation module, for will input audio volume with one-level attenuation quotient in default die-away time section
Gradually decay to target audio volume, if die-away time section is t, input audio volume is d1, and target audio volume is d2, one-level
Attenuation quotient is-k1, and wherein, t, d1, d2 and k1 are positive number, then each parameter of this module meets relationship below: d2=-k1*t
+d1；And
Two grades of volume attenuation modules, for will input audio volume with two grades of attenuation quotients in default die-away time section
Gradually decay to target audio volume, die-away time section is t, input audio volume is d1, the audio volume of bidding is d3, two grades
Attenuation quotient is-k2, and wherein, t, d1, d3 and k2 are positive number, then each parameter of this module meets relationship below: d3=-
k2*t+d1.And
Volume gain module, for will input in default gain time section audio volume gradually gain to target audio frequency
Volume；Preferably, this module includes following submodule:
Volume gain comparison module, for input audio volume is compared with default two grades of volume threshold, wherein,
Two grades of volume threshold are less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold
When, execute one-level volume gain module；When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain moulds
Block；
One-level volume gain module, for will input audio volume with one step gain coefficient in default gain time section
Gradually to target audio volume, if gain time section is t ', input audio volume is d1 ', and target audio volume is d2 ' for gain,
One step gain coefficient is k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then each parameter of this module meets relationship below:
D2 '=k1 ' * t '+d1 '；And
Two grades of volume gain modules, for will input audio volume with two stage gain coefficients in default gain time section
Gradually to target audio volume, if gain time section is t ', input audio volume is d1 ', and target audio volume is d3 ' for gain,
Two stage gain coefficients are k2 ', and wherein, t ', d1 ', d3 ' and k2 ' are positive number, then each parameter of this module meets following relation
Formula: d3 '=k2 ' * t '+d1 '.
Wherein, above-mentioned target audio volume is in above-mentioned volume range.
For a person skilled in the art, can technical scheme as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (4)
1. a kind of volume automatic control method it is characterised in that: it comprises the following steps:
Input audio volume comparison step: audio volume and default volume range will be inputted in default detection time in real time
Compare, judge to input whether audio volume is maintained in volume range, when input audio volume is maintained in volume range
When, then execute audio output step；When inputting the max volume that audio volume is remained above volume range, then execution volume declines
Subtract step；When inputting the minimal volume that audio volume remains less than volume range, then execute volume gain step；
Audio output step: directly by this input audio output；
Volume gain step: will input in default gain time section audio volume gradually gain to target audio volume；
And volume attenuation step: in default die-away time section, input audio volume is gradually decayed to target audio frequency sound
Amount；Described volume attenuation step includes following sub-step:
Volume attenuation comparison step: input audio volume is compared with default one-level volume threshold, wherein, one-level volume
Threshold value is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold, executes one
Level volume attenuation step；
When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation steps；
One-level volume attenuation step: audio volume will be inputted in default die-away time section and gradually decayed with one-level attenuation quotient
To target audio volume, die-away time section is designated as t, input audio volume is designated as d1, and target audio volume is designated as d2, and one-level declines
Subtract coefficient and be designated as-k1, wherein, t, d1, d2 and k1 are positive number, then each parameter of this step meets relationship below: d2=-k1*t
+d1；And
Two grades of volume attenuation steps: audio volume will be inputted in default die-away time section and gradually decayed with two grades of attenuation quotients
To target audio volume, die-away time section is designated as t, input audio volume is designated as d1, target audio volume is designated as d3, two grades
Attenuation quotient is designated as-k2, and wherein, t, d1, d3 and k2 are positive number, and k2 is more than k1, then each parameter satisfaction of this step is following
Relational expression: d3=-k2*t+d1；
Wherein, above-mentioned target audio volume is in above-mentioned volume range.
2. volume automatic control method as claimed in claim 1 it is characterised in that: volume gain step includes following sub-step
Rapid:
Volume gain comparison step: input audio volume is compared with default two grades of volume threshold, wherein, two grades of volumes
Threshold value is less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold, executes one
Level volume gain step；
When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain steps；
One-level volume gain step: audio volume will be inputted in default gain time section with the gradually gain of one step gain coefficient
To target audio volume, gain time section is designated as t ', input audio volume is designated as d1 ', and target audio volume is designated as d2 ', one
Stage gain coefficient is designated as k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then above-mentioned each parameter meets relationship below: d2 '
=k1 ' * t '+d1 '；And
Two grades of volume gain steps: audio volume will be inputted in default gain time section with two stage gain coefficient gradually gains
To target audio volume, gain time section is designated as t ', input audio volume is designated as d1 ', and target audio volume is designated as d3 ', two
Stage gain coefficient is designated as k2 ', and wherein, t ', d1 ', d3 ' and k2 ' are positive number, and k2 ' is more than k1 ', then each parameter of this step
Meet relationship below: d3 '=k2 ' * t '+d1 '.
3. a kind of Automatic control of sound volume system it is characterised in that: it includes with lower module:
Input audio volume comparison module, for will input audio volume and default volume in real time in default detection time
Scope is compared, and judges to input whether audio volume is maintained in volume range, when input audio volume is maintained at volume model
When enclosing interior, then execute dio Output Modules；When inputting the max volume that audio volume is remained above volume range, then execute sound
Amount attenuation module；When inputting the minimal volume that audio volume remains less than volume range, then execute volume gain module；
Dio Output Modules, for directly by this input audio output；
Volume gain module, for will input in default gain time section audio volume gradually gain to target audio frequency sound
Amount；
And volume attenuation module, for input audio volume gradually being decayed to target audio frequency in default die-away time section
Volume；Volume attenuation module includes following submodule:
Volume attenuation comparison module, for input audio volume is compared with default one-level volume threshold, wherein, one-level
Volume threshold is more than above-mentioned max volume, when input audio volume is between above-mentioned max volume and one-level volume threshold, holds
Row one-level volume attenuation module；When inputting audio volume more than one-level volume threshold, execute two grades of volume attenuation modules；
One-level volume attenuation module, for gradually being declined input audio volume with one-level attenuation quotient in default die-away time section
Reduce to target audio volume, die-away time section is designated as t, input audio volume is designated as d1, and target audio volume is designated as d2, one-level
Attenuation quotient is designated as-k1, and wherein, t, d1, d2 and k1 are positive number, then each parameter of this step meets relationship below: d2=-
k1*t+d1；And
Two grades of volume attenuation modules, for will input audio volume with two grades of attenuation quotients gradually in default die-away time section
Decay to target audio volume, die-away time section be designated as t, input audio volume is designated as d1, target audio volume is designated as d3,
Two grades of attenuation quotients are designated as-k2, and wherein, t, d1, d3 and k2 are positive number, and k2 is more than k1, then each parameter of this step meets
Relationship below: d3=-k2*t+d1；
Wherein, above-mentioned target audio volume is in above-mentioned volume range.
4. Automatic control of sound volume system as claimed in claim 3 it is characterised in that: volume gain module includes following submodule
Block:
Volume gain comparison module, for input audio volume is compared with default two grades of volume threshold, wherein, two grades
Volume threshold is less than above-mentioned minimal volume, when input audio volume is between above-mentioned minimal volume and two grades of volume threshold, holds
Row one-level volume gain module；When inputting audio volume less than two grades of volume threshold, execute two grades of volume gain modules；
One-level volume gain module, for will input audio volume with one step gain coefficient gradually in default gain time section
Gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is designated as
D2 ', one step gain coefficient is designated as k1 ', and wherein, t ', d1 ', d2 ' and k1 ' are positive number, then above-mentioned each parameter meets following relation
Formula: d2 '=k1 ' * t '+d1 '；And
Two grades of volume gain modules, for will input audio volume with two stage gain coefficients gradually in default gain time section
Gain, to target audio volume, gain time section is designated as t ', and input audio volume is designated as d1 ', and target audio volume is designated as
D3 ', two stage gain coefficients are designated as k2 ', wherein, t ', d1 ', d3 ' and k2 ' are positive number, and k2 ' is more than k1 ', then this step
Each parameter meets relationship below: d3 '=k2 ' * t '+d1 '.
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| CN106385623A (en) * | 2016-09-18 | 2017-02-08 | 深圳市金立通信设备有限公司 | Media sound prompt method and terminal |
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