CN104883148B - Method for controlling volume, playback equipment and system - Google Patents
Method for controlling volume, playback equipment and system Download PDFInfo
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- CN104883148B CN104883148B CN201510259648.5A CN201510259648A CN104883148B CN 104883148 B CN104883148 B CN 104883148B CN 201510259648 A CN201510259648 A CN 201510259648A CN 104883148 B CN104883148 B CN 104883148B
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Abstract
The invention discloses a kind of method for controlling volume, playback equipment and system.Select a volume value output preset audio signal successively from default volume value set, at least one volume value that the default volume value set can be exported by first playback equipment forms；If receiving the threshold feedback information of the second playback equipment transmission, current volume value is defined as volume threshold, the threshold feedback information is used to represent that the intensity for the audio signal that second playback equipment receives is more than predetermined threshold value；Target audio signal is exported according to the volume threshold.The present invention can export target audio signal according to the volume threshold, and the volume value of target audio signal is not more than the volume threshold.Realize that the audio signal of each playback equipment output is not interfere with each other, and then optimize the effect of the result of broadcast of playback equipment.
Description
Technical field
The present embodiments relate to electronic equipment control technology, more particularly to a kind of method for controlling volume, playback equipment and
System.
Background technology
With the development of radio network technique, radio network technique is widely applied to music field.Some music
Multiple music player devices are attached by playback equipment business by wireless network, form what is be made up of multiple music player devices
Music playing system.
User is grouped by intelligent terminal to each audio-frequence player device in music playing system, obtains multiple broadcastings
Group.The broadcasting multicast that user's control is located at different zones puts different music, realizes personal settings.Such as：By in parlor
Two music player devices are set to the first broadcasting group, and a music player devices in bedroom are set into the second broadcasting group.Then, use
Control the first broadcasting multicast in family puts rock music, the second broadcasting multicast puts light music.
If the broadcast sound volume of the first broadcasting group is excessive, the audio signal of the second playback equipment output can be disturbed, is influenceed
The result of broadcast of second broadcasting group.In upper example, if the broadcast sound volume of the first broadcasting group in parlor is excessive, user is in bedroom
In can be indistinct when listening to the light music that the second broadcasting multicast is put hear rock music.User is in order to eliminate the first broadcasting group to second
The interference of broadcasting group is, it is necessary to by the turning down sound volume of the first broadcasting group, untill the result of broadcast of the second broadcasting group is not influenceed.Such as
Fruit user is also provided with other broadcasting groups, and other play the broadcasting effect that the broadcast sound volume that multicast is put also have impact on the second broadcasting group
Fruit, then user also need to be adjusted the volume of other broadcasting groups.
The content of the invention
The present invention provides a kind of method for controlling volume, playback equipment and system, to realize that the audio that each broadcasting multicast is put is believed
Number it does not interfere with each other.
In a first aspect, the embodiments of the invention provide a kind of method for controlling volume, methods described is applied to the first broadcasting and set
Standby, methods described includes：
Select a volume value output preset audio signal, the default volume value collection successively from default volume value set
At least one volume value that closing can be exported by first playback equipment forms；
If receiving the threshold feedback information of the second playback equipment transmission, current volume value is defined as volume threshold
Value, the threshold feedback information are used to represent that the intensity for the audio signal that second playback equipment receives to be more than default threshold
Value；
Target audio signal is exported according to the volume threshold.
Second aspect, the embodiment of the present invention additionally provide a kind of method for controlling volume, and methods described is applied to second and played
Equipment, methods described include：
Receive the preset audio signal of the first playback equipment output；
Obtain the intensity of the preset audio signal；
It is anti-to the first playback equipment sending threshold value if the intensity of the preset audio signal is more than predetermined threshold value
Feedforward information, the predetermined threshold value are the intensity for the noise that user receives.
The third aspect, the embodiment of the present invention additionally provide a kind of first playback equipment, including：
Preset audio signal output unit, for selecting a volume value output default successively from default volume value set
Audio signal, at least one volume value that the default volume value set can be exported by first playback equipment form；
Threshold feedback information receiving unit, the threshold feedback information sent for receiving the second playback equipment, the threshold value
Feedback information is used to represent that the intensity for the audio signal that second playback equipment receives is more than predetermined threshold value；
Determining unit, for when receiving unit receives the threshold feedback information that the second playback equipment is sent, inciting somebody to action current
Volume value is defined as volume threshold；
Target audio signal output unit is additionally operable to, and the volume threshold determined according to the determining unit is to target sound
Frequency signal is exported.
Fourth aspect, the embodiment of the present invention additionally provide a kind of second playback equipment, including：
Audio signal reception unit, for receiving the preset audio signal of the first playback equipment output；
Loudness of a sound acquiring unit, for obtaining the intensity of the preset audio signal；
Feedback information transmitting element, the intensity of the preset audio signal for being obtained when the loudness of a sound acquiring unit are big
When predetermined threshold value, to the first playback equipment sending threshold value feedback information, the predetermined threshold value is the noise that user receives
Intensity.
5th aspect, the embodiment of the present invention additionally provide a kind of sound-volume control system, including first described in the third aspect
The second playback equipment described in playback equipment and fourth aspect.
Second playback equipment of the invention can be when the intensity of the preset audio signal received be more than predetermined threshold value, to the
One playback equipment sending threshold value feedback information, know the first playback equipment and preset audio signal is exported according to current volume value
When, the intensity of the preset audio signal received by the second playback equipment reaches threshold value, and then the first playback equipment will be current
Volume value determines volume threshold.Volume threshold with each playback equipment in the prior art is the max volume that itself can be provided
Value, can not be controlled to max volume value and compare, and the present invention can export target audio signal, target according to the volume threshold
The volume value of audio signal is not more than the volume threshold.Realize that the audio signal of each playback equipment output is not interfere with each other, and then
Optimize the effect of the result of broadcast of playback equipment.
Brief description of the drawings
Fig. 1 is the flow chart of a method for controlling volume in the embodiment of the present invention one；
Fig. 2 is the flow chart of a method for controlling volume in the embodiment of the present invention two；
Fig. 3 is the flow chart of another method for controlling volume in the embodiment of the present invention two；
Fig. 4 is the flow chart of a method for controlling volume in the embodiment of the present invention three；
Fig. 5 is the structural representation of first playback equipment in the embodiment of the present invention four；
Fig. 6 is the structural representation of another the first playback equipment in the embodiment of the present invention four；
Fig. 7 is the structural representation of second playback equipment in the embodiment of the present invention five；
Fig. 8 is the structural representation of another the second playback equipment in the embodiment of the present invention five；
Fig. 9 is the schematic diagram of a sound-volume control system in the embodiment of the present invention six.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is the flow chart for the method for controlling volume that the embodiment of the present invention one provides, and the present embodiment is applicable to music and broadcast
The volume of the first playback equipment is excessive in place system, influences the second playback equipment (other playback equipments in music playing system)
Result of broadcast situation, this method can perform by the first playback equipment, specifically comprised the following steps：
Step 110, select a volume value output preset audio signal successively from default volume value set.
Wherein, at least one volume value group that the default volume value set can be exported by first playback equipment
Into.
Preset audio signal can be a section audio signal, a such as song, one section of recording；It can also be one section not advise
Then sound wave, to be different from the audio file routinely played.After user selects a certain audio file, the output of the first playback equipment should
Audio file, and obtain audio signal corresponding to the audio file.
The quantity of volume value and the maximum output volume value of the first playback equipment and regulation that default volume value set includes
Granularity is relevant, and corresponding relation is as follows：
Maximum output volume value/regulation granularity of the playback equipment of the quantity of volume value=first.
Each volume value in default volume value set corresponds to the decibel value of one.Assuming that the first playback equipment is maximum defeated
Go out decibel for 150 decibels.If it is 15 decibels to adjust granularity, there are 10 volume values in default volume value set, correspond to respectively
{ 15 decibels, 30 decibels, 45 decibels, 60 decibels, 75 decibels, 90 decibels, 105 decibels, 120 decibels, 135 decibels, 150 decibels }.
If it is 1.5 decibels to adjust granularity, contains 100 volume values in default volume value set, correspond to { 1.5 decibels, 3 points respectively
148.5 decibels, 150 decibels of shellfish ... } (totally 100 decibel values).
If step 120, the threshold feedback information for receiving the transmission of the second playback equipment, current volume value is defined as
Volume threshold.
Wherein, the threshold feedback information is used to represent that the intensity for the audio signal that second playback equipment receives is big
In predetermined threshold value.
Threshold feedback information can be indicated by adding a flag bit in existing signaling, and it is exclusive can also to create one
Signaling is as the threshold feedback information.One section of audio signal with specific frequency spectrum can also be exported by the second playback equipment,
If the first playback equipment receives the audio signal, it is determined that receives threshold feedback information.
Multiple playback equipments may be present in music playing system, the second playback equipment is except first broadcasts in music playing system
Put any playback equipment beyond equipment.After the first playback equipment exports preset audio signal, in music playing system extremely
A few other equipment (the second playback equipment), can receive the preset audio signal, and carry out respective handling.Specific place
Reason flow is described further below.When all playback equipments of music playing system are true as the first playback equipment
After determining volume threshold, when any one playback equipment is according to volume threshold exports audio signal in music playing system, will not
The result of broadcast of remaining playback equipment is had an impact.
Step 130, according to volume threshold target audio signal is exported.
Target audio signal is that user selects after volume threshold audio signal is determined, as user selects the music that plays
Play, song, films and television programs (audio signal with picture synchronization) etc..
The technical scheme that the present embodiment provides, the threshold feedback that the first playback equipment can be sent according to the second playback equipment
Information determines volume threshold.Volume threshold with each playback equipment in the prior art is the max volume value that itself can be provided,
Max volume value can not be controlled and compared, the present invention can export target audio signal according to the volume threshold.Realize each
The audio signal of playback equipment output is not interfere with each other, and then optimizes the effect of the result of broadcast of playback equipment.
Embodiment two
Putting in order for volume value in default volume value set is probably random alignment, the volume now sequential read out
Value is also random.That the volume value of reading is bigger than actual volume threshold value may be present, now play and set according to second
The false volume threshold that the threshold feedback information that preparation is sent determines will be greater than actual volume threshold value, cause according to the false volume threshold
When value is exported, however it remains the volume value of output be higher than actual volume threshold value situation so that it is determined that volume threshold not
Accurately.
In order to solve the above problems, a kind of method for controlling volume is present embodiments provided, as to the specific of embodiment one
Illustrate, step 110, select a volume value output preset audio signal to include successively from default volume value set：From default
It is ascending in volume value set to select a volume value output preset audio signal successively.
Default volume value is combined and is ranked up, obtains the ascending volume value set being arranged in order.Again from first
Volume value starts, and selects a volume value output preset audio signal successively.
The technical scheme that the present embodiment provides, can be sequentially output preset audio signal according to ascending volume, carry
The accuracy of louder volume threshold value.
If the first playback equipment continuously plays preset audio signal, the first playback equipment is likely to occur in n-th
The threshold feedback information that receives when exporting preset audio signal, it is that N-1 times or the N-M times (M is less than in the second playback equipment base area
What preset audio signal N) was sent, the volume threshold for causing the first playback equipment to determine is inaccurate.
In order to solve the above problems, a kind of method for controlling volume is present embodiments provided, as the tool to above-described embodiment
Body illustrates, step 110, selects a volume value output preset audio signal to include successively from default volume value set：According to
Prefixed time interval, a volume value output preset audio signal is selected successively from default volume value set, when described default
Between interval more than the preset audio signal duration.
Prefixed time interval can be obtained by any one following mode：
1st, the duration that user inputs is defined as the prefixed time interval.
2nd, when exporting the preset audio signal for the first time, respond request is sent to second playback equipment, so as to
Second playback equipment is according to the respond request feeding back response information.First playback equipment is according to receiving and should subtract with the time of message
Time when going to send respond request, along with the duration of preset audio signal, obtain prefixed time interval.
The threshold feedback message that the present embodiment can ensure to receive is that the second playback equipment is made for current volume value
Feedback, improve the accuracy of volume threshold.
It is determined that after volume threshold, the max volume value in volume adjusting interface can be changed accordingly.Such as：Volume is adjusted
Max volume value in section interface is adjusted to volume threshold., also can not be to volume adjusting interface in order to keep the integrality at interface
Modify, but the volume that user's selection can be now present is more than volume threshold.
In order to solve the above problems, the present embodiment additionally provides a kind of method for controlling volume, as to above-described embodiment
Illustrate, as shown in Fig. 2 step 130, carrying out output to target audio signal according to volume threshold and including：
Step 131, the volume control instruction for receiving user's input, the volume control instruction carry broadcasting for user's instruction
Playback amount.
When user in volume adjusting interface by clicking on or when the mode such as mobile sliding shoe selects a certain volume value, triggering
The volume control instruction.
Step 132, judge whether the broadcast sound volume of user's instruction is more than volume threshold.
Step 133, if a user indicate that broadcast sound volume be less than or equal to the volume threshold, then according to user indicate broadcasting
Playback amount exports the target audio signal.
Now the volume value of reality output is the broadcast sound volume of user's instruction.
Step 134, if a user indicate that broadcast sound volume be more than the volume threshold, then according to the volume threshold export
Target audio signal.
Now the volume value of reality output is volume threshold.
The technical scheme that the present embodiment provides, when the broadcast sound volume that can be indicated in user is higher than volume threshold, use sound
Amount threshold value exports to target audio signal, improves the reliability of volume control.
Further, after step 133, prompt message, or the display reminding in volume adjusting interface be may also display
Mark, to prompt the volume value of its selection of user to exceed volume threshold, the result of broadcast of other playback equipments was both influenced whether.
As described in the background art, multiple broadcasting groups are included in music playing system, each play sets in a broadcasting group
Standby synchronous broadcasting identical audio signal.When the first playback equipment and the second playback equipment belong to same broadcasting group, even if
The volume of first playback equipment and the second playback equipment is different, also will not be to interfering each other.When the first playback equipment belongs to
First broadcasting group, it is necessary to determine the first playback equipment by above-described embodiment when the second playback equipment belongs to the second broadcasting group
Volume threshold, to eliminate the interference to the result of broadcast of the second playback equipment.
Further, when containing at least two playback equipments, and at least two playback equipment in same broadcasting group
In same region, there is the problem of retest in the volume threshold for obtaining each playback equipment respectively.
In order to solve the above problems, the present embodiment additionally provides a kind of method for controlling volume, as to above-described embodiment
Further illustrate, as shown in figure 3, receiving the threshold feedback information of the second playback equipment transmission in the step 120, also wrap afterwards
Include：
Step 140, the volume threshold sent to remaining playback equipment, so that remaining described playback equipment is according to
Volume threshold exports target audio signal.
Wherein, remaining playback equipment is in broadcasting group belonging to the first playback equipment (the first broadcasting group), except the first broadcasting is set
Playback equipment beyond standby.
If remaining playback equipment does not determine volume threshold, max volume value is defined as its sound with playback equipment
Measure threshold value.
The technical scheme that the present embodiment provides, the volume threshold of remaining equipment constant current journey really can be simplified, improve efficiency.
Embodiment three
A kind of method for controlling volume is present embodiments provided, methods described is used to be matched somebody with somebody with the method that embodiment one provides
Close, realize volume control.Methods described is applied to the second playback equipment, as shown in figure 4, methods described includes：
Step 210, the preset audio signal for receiving the output of the first playback equipment.
Second playback equipment has the audio input device that such as microphone and the recording circuit being connected with microphone are formed.
The preset audio signal of the first playback equipment input is received by audio input device.
Step 220, the intensity for obtaining the preset audio signal.
The unit of the intensity of preset audio signal is decibel.The specific reality of the intensity of audio signal is obtained according to audio signal
Existing mode can refer to related content of the prior art, not repeat herein.
If step 230, the intensity of the preset audio signal are more than predetermined threshold value, sent out to first playback equipment
Threshold feedback information is sent, the predetermined threshold value is the intensity for the noise that user receives.
Predetermined threshold value can be obtained by following manner：
Default volume value is defined as the predetermined threshold value；Or the volume value for inputting user is defined as described preset
Threshold value.
Wherein, it is a reference value to preset volume value, such as 40 decibels.The volume value of user's input can be direct by user
Decibel value is inputted, audio, user predetermined threshold value can also be determined according to the sense of hearing as corresponding to the second playback equipment plays decibel value
Corresponding decibel value.
The technical scheme of the present embodiment, the preset audio signal of the first playback equipment output is obtained by the second playback equipment
Intensity, if the intensity is more than predetermined threshold value, to the first playback equipment sending threshold value feedback information, plays and set so as to first
It is standby to know that current volume is the critical value interfered to the second playback equipment, realize to the volume threshold of the first playback equipment
Set, when ensureing that the first playback equipment exports target audio signal according to volume threshold, do not interfere with broadcasting for the second playback equipment
Effect is put, optimizes the result of broadcast of the second playback equipment.
Example IV
A kind of first playback equipment is present embodiments provided, the method provided for realizing embodiment one and embodiment two,
As shown in figure 5, including：
Preset audio signal output unit 11, for selecting a volume value output pre- successively from default volume value set
If audio signal, at least one volume value that the default volume value set can be exported by first playback equipment forms；
Threshold feedback information receiving unit 12, the threshold feedback information sent for receiving the second playback equipment, the threshold
Value feedback information is used to represent that the intensity for the audio signal that second playback equipment receives is more than predetermined threshold value；
Determining unit 13, for when receiving unit receive the second playback equipment transmission threshold feedback information when, ought
Preceding volume value is defined as volume threshold；
Target audio signal output unit 14, for the volume threshold that is determined according to the determining unit 13 to target
Audio signal is exported.
Further, the preset audio signal output unit 11 is specifically used for：
It is ascending from default volume value set to select a volume value output preset audio signal successively.
Further, the preset audio signal output unit 11 is additionally operable to：
According to prefixed time interval, a volume value output preset audio letter is selected successively from default volume value set
Number, the prefixed time interval is more than the duration of the preset audio signal.
Further, the target audio signal output unit 14 is additionally operable to：
If a user indicate that broadcast sound volume be less than or equal to the volume threshold, then according to user indicate broadcast sound volume it is defeated
Go out the target audio signal；
If a user indicate that broadcast sound volume be more than the volume threshold, then according to the volume threshold export target audio
Signal.
Further, as shown in fig. 6, the first playback equipment also includes volume threshold transmitting element 15, for will it is described really
The volume threshold that order member 13 determines is sent to remaining playback equipment, so that remaining described playback equipment is according to the volume
Threshold value exports target audio signal, and remaining described playback equipment is except first plays in broadcasting group belonging to first playback equipment
Playback equipment beyond equipment.
Embodiment five
A kind of second playback equipment, the method provided for realizing embodiment three, such as Fig. 7 institutes are be provided
Show, including：
Mesh audio signal reception unit 21, for receiving the preset audio signal of the first playback equipment output；
Loudness of a sound acquiring unit 22, for obtaining the intensity of the preset audio signal；
Feedback information transmitting element 23, for the strong of the preset audio signal that is obtained when the loudness of a sound acquiring unit 22
When degree is more than predetermined threshold value, to the first playback equipment sending threshold value feedback information, the predetermined threshold value is what user received
The intensity of noise.
Further, as shown in figure 8, second playback equipment also includes：
Predetermined threshold value determining unit 24, for default volume value to be defined as into the predetermined threshold value；Or
The volume value that user inputs is defined as the predetermined threshold value.
Embodiment six
A kind of sound-volume control system is present embodiments provided, as shown in figure 9, the system is as first shown in Fig. 5 or Fig. 6
Playback equipment 31 and the second playback equipment 32 shown in Fig. 7 or Fig. 8 form.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (9)
1. a kind of method for controlling volume, methods described is applied to the first playback equipment, it is characterised in that methods described includes：
Default volume value is ranked up, the default volume value set being arranged in order from small to large；
Select a volume value output preset audio signal, the default volume value collection successively from the default volume value set
At least one volume value that closing can be exported by first playback equipment forms；
If receiving the threshold feedback information of the second playback equipment transmission, current volume value is defined as volume threshold, institute
State threshold feedback information and be used for the audio signal for representing that first playback equipment that second playback equipment receives broadcasts
Intensity be more than predetermined threshold value；
Target audio signal is exported according to the volume threshold；
It is described to select a volume value output preset audio signal to include successively from the default volume value set：
According to prefixed time interval, a volume value output preset audio signal, institute are selected successively from default volume value set
State the duration that prefixed time interval is more than the preset audio signal.
2. method for controlling volume according to claim 1, it is characterised in that described to be selected successively from default volume value set
Selecting a volume value output preset audio signal includes：
It is ascending from default volume value set to select a volume value output preset audio signal successively.
3. method for controlling volume according to claim 1, it is characterised in that it is described according to the volume threshold to target sound
Frequency signal, which carries out output, to be included：
If a user indicate that broadcast sound volume be more than the volume threshold, then according to the volume threshold export target audio letter
Number.
4. method for controlling volume according to claim 3, it is characterised in that current volume value is being defined as volume threshold
Also include afterwards：
The volume threshold is sent to remaining playback equipment, so that remaining described playback equipment exports according to the volume threshold
The target audio signal, remaining described playback equipment are to remove the first playback equipment in broadcasting group belonging to first playback equipment
Playback equipment in addition.
A kind of 5. first playback equipment, it is characterised in that including：
Preset audio signal output unit, for being ranked up to default volume value, what is be arranged in order from small to large is default
Volume value set；Select a volume value output preset audio signal successively from the default volume value set, it is described default
At least one volume value that volume value set can be exported by first playback equipment forms；
Threshold feedback information receiving unit, the threshold feedback information sent for receiving the second playback equipment, the threshold feedback
Information is used to represent that the intensity for the audio signal that first playback equipment that second playback equipment receives broadcasts to be more than
Predetermined threshold value；
Determining unit, for when receiving unit receive the second playback equipment transmission threshold feedback information when, by current volume
Value is defined as volume threshold；
Target audio signal output unit, for the volume threshold that is determined according to the determining unit to target audio signal
Exported；
The preset audio signal output unit is additionally operable to：
According to prefixed time interval, a volume value output preset audio letter is selected successively from the default volume value set
Number, the prefixed time interval is more than the duration of the preset audio signal.
6. the first playback equipment according to claim 5, it is characterised in that the preset audio signal output unit is specific
For：
It is ascending from default volume value set to select a volume value output preset audio signal successively.
7. the first playback equipment according to claim 5, it is characterised in that the target audio signal output unit is also used
In：
If a user indicate that broadcast sound volume be more than the volume threshold, then according to the volume threshold export target audio letter
Number.
8. the first playback equipment according to claim 7, it is characterised in that above-mentioned first playback equipment also includes volume threshold
It is worth transmitting element, for the volume threshold to be sent to remaining playback equipment, so that remaining described playback equipment is according to
Volume threshold exports target audio signal, and remaining described playback equipment is that first is removed in broadcasting group belonging to first playback equipment
Playback equipment beyond playback equipment.
9. a kind of sound-volume control system, the system includes the first playback equipment any one of claim 5 to 8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442636A (en) * | 2007-11-20 | 2009-05-27 | 康佳集团股份有限公司 | Intelligent regulating method and system for television sound volume |
| CN103686546A (en) * | 2013-12-13 | 2014-03-26 | 大连现代高技术集团有限公司 | Method for controlling multichannel sound distributing and switching of vehicle-mounted terminal |
| CN103945253A (en) * | 2014-04-04 | 2014-07-23 | 北京智谷睿拓技术服务有限公司 | Volume control method and device and multimedia playing control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5664413B2 (en) * | 2011-03-31 | 2015-02-04 | ヤマハ株式会社 | Acoustic signal processing device |
| EP2611213B1 (en) * | 2011-12-29 | 2015-08-26 | Harman Becker Automotive Systems GmbH | Sound system with individual playback zones |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442636A (en) * | 2007-11-20 | 2009-05-27 | 康佳集团股份有限公司 | Intelligent regulating method and system for television sound volume |
| CN103686546A (en) * | 2013-12-13 | 2014-03-26 | 大连现代高技术集团有限公司 | Method for controlling multichannel sound distributing and switching of vehicle-mounted terminal |
| CN103945253A (en) * | 2014-04-04 | 2014-07-23 | 北京智谷睿拓技术服务有限公司 | Volume control method and device and multimedia playing control method and device |
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