CN106170114A - Control method, device and the audio-frequence player device of a kind of audio frequency output - Google Patents
Control method, device and the audio-frequence player device of a kind of audio frequency output Download PDFInfo
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- CN106170114A CN106170114A CN201610859984.8A CN201610859984A CN106170114A CN 106170114 A CN106170114 A CN 106170114A CN 201610859984 A CN201610859984 A CN 201610859984A CN 106170114 A CN106170114 A CN 106170114A
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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
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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Abstract
The present invention provides control method, device and the audio-frequence player device that a kind of audio frequency exports, the control method that this audio frequency exports, including: obtain the first audio signal of the first sound channel and the second audio signal of second sound channel；It is filtered the first audio signal processing, respectively obtains the first low frequency signal and the first high frequency signal, and be filtered the second audio signal processing, respectively obtain the second low frequency signal and the second high frequency signal；First low frequency signal and the second low frequency signal are overlapped, obtain the 3rd audio signal；3rd audio signal and the first high frequency signal are carried out audio mixing, obtains the first audio output signal of the first sound channel, and the 3rd audio signal and the second high frequency signal are carried out audio mixing, obtain the second audio output signal of second sound channel.The program, enhances the low-frequency effect of sound channel, the method that this kind strengthens low frequency audio simultaneously, does not change the existing structure of equipment, reduce and realize cost.
Description
Technical field
The present invention relates to audio signal processing technique field, control method, device and the audio frequency exported particularly to a kind of audio frequency
Playback equipment.
Background technology
Mobile terminal and the portable sound box of currently used twin loudspeaker are more and more universal, and people download stereo sound from network
Use playback equipment to play out behind source and can obtain stereophonic effect, but same stereophonic effect is not really from earphone or special
The effect shock that industry stereo set plays back, main cause is that the size of portable equipment and small-sized solid sound box is less, low frequency
Sensitivity is not enough, it is impossible to low frequency part is effectively reduced and causes, therefore wants to promote stereosonic effect and be accomplished by promoting stereo
Low frequency result of broadcast.
Promote low frequency most efficient method at present and use 2.1 audio amplifiers (i.e. increasing a special subwoofer) exactly, specially
For playing low frequency, promote low-frequency effect, but the problem brought is to need to increase a bass horn and special low frequency drives
Dynamic power amplifier, but this kind of mode causes relatively costly, and the volume also resulting in portable equipment is bigger.
Summary of the invention
The technical problem to be solved in the present invention is to provide the control method of a kind of audio frequency output, device and audio frequency broadcasting and sets
Standby, the volume of portable equipment can be caused relatively big in order to solve the method for existing lifting low frequency, cause simultaneously realize relatively costly
Problem.
In order to solve above-mentioned technical problem, the embodiment of the present invention provides the control method of a kind of audio frequency output, including:
Obtain the first audio signal of the first sound channel and the second audio signal of second sound channel；
It is filtered described first audio signal processing, respectively obtains the first low frequency signal and the first high frequency signal,
And be filtered processing to described second audio signal, respectively obtain the second low frequency signal and the second high frequency signal；
Described first low frequency signal and described second low frequency signal are overlapped, obtain the 3rd audio signal；
Described 3rd audio signal and described first high frequency signal are carried out audio mixing, obtains the first of described first sound channel
Audio output signal, and described 3rd audio signal and described second high frequency signal are carried out audio mixing, obtain described second
Second audio output signal of sound channel.
The embodiment of the present invention provides the control device of a kind of audio frequency output, including:
Acquisition module, for obtaining the first audio signal and second audio signal of second sound channel of the first sound channel；
First processing module, for described first audio signal is filtered process, respectively obtains the first low frequency signal
With the first high frequency signal, and it is filtered described second audio signal processing, respectively obtains the second low frequency signal and the
Two high frequency signal；
Laminating module, for described first low frequency signal and described second low frequency signal being overlapped, obtains the 3rd sound
Frequently signal；
Mix module, for described 3rd audio signal and described first high frequency signal are carried out audio mixing, obtains described
First audio output signal of the first sound channel, and described 3rd audio signal is mixed with described second high frequency signal
Sound, obtains the second audio output signal of described second sound channel.
The embodiment of the present invention also provides for a kind of audio-frequence player device, including the control device of above-mentioned audio frequency output.
The invention has the beneficial effects as follows:
Such scheme, by the low frequency signal of the first sound channel and second sound channel is overlapped process, obtains superposition
Audio signal, as the first sound channel and the low frequency signal of second sound channel, enhances the low-frequency effect in sound channel with this, and this kind strengthens
The method of low frequency audio, does not change the existing structure of equipment, reduces and realize cost, improves the experience of user.
Accompanying drawing explanation
Fig. 1 represents the schematic flow sheet of the control method of the audio frequency output of first embodiment of the invention；
Fig. 2 represents the schematic flow sheet of the control method of the audio frequency output of second embodiment of the invention；
Fig. 3 represents in actual applications, the processing procedure schematic diagram of audio signal；
Fig. 4 represents the structural representation one controlling device of the audio frequency output of third embodiment of the invention；
Fig. 5 represents the structural representation two controlling device of the audio frequency output of third embodiment of the invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, the most right
The present invention is described in detail.
The method that the present invention is directed to existing lifting low frequency can cause the volume of portable equipment relatively greatly, causes simultaneously and is implemented as
This higher problem, it is provided that control method, device and the audio-frequence player device of a kind of audio frequency output.
First embodiment
As it is shown in figure 1, the control method of the audio frequency output of the embodiment of the present invention, including:
Step 11, obtains the first audio signal of the first sound channel and the second audio signal of second sound channel.
It should be noted that for the played in stereo effect realizing audio frequency, most of audio-frequence player devices all use a left side
R channel carries out the broadcasting of audio frequency, and the first sound channel in the present embodiment is L channel, and second sound channel is R channel.
Step 12, is filtered described first audio signal processing, and respectively obtains in the first low frequency signal and first high
Frequently signal, and be filtered described second audio signal processing, respectively obtain the second low frequency signal and the second medium-high frequency letter
Number.
It should be noted that because inventive embodiments is mainly accomplished that the low-frequency effect strengthening broadcasting audio frequency, so
In this step 12, need the low frequency signal of low frequency signal and the R channel getting L channel respectively, and obtain L channel
High frequency signal and the high frequency signal of R channel.
Step 13, is overlapped described first low frequency signal and described second low frequency signal, obtains the 3rd audio signal.
In the present embodiment, use the mode being overlapped by left and right acoustic channels low frequency signal, strengthen the low frequency playing audio frequency
Effect, the low frequency signal low frequency signal more original than left and right acoustic channels after superposition will be strong, the effect reaching to strengthen low frequency with this.
Step 14, carries out audio mixing by described 3rd audio signal and described first high frequency signal, obtains described first sound
First audio output signal in road, and described 3rd audio signal and described second high frequency signal are carried out audio mixing, obtain
Second audio output signal of described second sound channel.
In the present embodiment, using the low frequency signal after the low frequency signal superposition of original left and right acoustic channels as the low frequency of left and right acoustic channels
Signal so that the low frequency signal of left and right acoustic channels has all reached the effect strengthened, and improves stereo low frequency result of broadcast with this.
Second embodiment
As in figure 2 it is shown, the control method of the audio frequency output of the embodiment of the present invention, including:
Step 21, obtains the first audio signal of the first sound channel and the second audio signal of second sound channel.
It should be noted that for the played in stereo effect realizing audio frequency, most of audio-frequence player devices all use a left side
R channel carries out the broadcasting of audio frequency, and the first sound channel in the present embodiment is L channel, and second sound channel is R channel.
Step 22, is filtered described first audio signal processing, and respectively obtains in the first low frequency signal and first high
Frequently signal, and be filtered described second audio signal processing, respectively obtain the second low frequency signal and the second medium-high frequency letter
Number.
It should be noted that because inventive embodiments is mainly accomplished that the low-frequency effect strengthening broadcasting audio frequency, so
In this step 22, need the low frequency signal of low frequency signal and the R channel getting L channel respectively, and obtain L channel
High frequency signal and the high frequency signal of R channel.
Step 23, is overlapped described first low frequency signal and described second low frequency signal, obtains the 3rd audio signal.
It should be noted that above-mentioned described superposition refers to described first low frequency signal and described second low frequency signal
Same frequency point be overlapped, as the first low frequency signal and the second low frequency signal include the signal of multiple frequency, folding
Added-time, the identical frequency in the first low frequency signal and the second low frequency signal is overlapped, when in one of which in another one
In when not finding identical frequency, this frequency is not processed.In the present embodiment, use and left and right acoustic channels low frequency signal is carried out
The mode of superposition, strengthens the low-frequency effect playing audio frequency, the low frequency signal low frequency signal more original than left and right acoustic channels after superposition
Will be strong, the effect reaching to strengthen low frequency with this.
Step 24, according to predetermined threshold value and gain, carries out dynamic range control process to described 3rd audio signal, obtains
The 3rd audio signal after process.
It should be noted that the process of the audio signal after utilizing dynamic range control (DRC) to be overlapped, it is possible to achieve
Enhancing to audio signal, in the present embodiment, step 24 improves the intensity of low frequency signal further.
Step 25, carries out audio mixing by described 3rd audio signal and described first high frequency signal, obtains described first sound
First audio output signal in road, and described 3rd audio signal and described second high frequency signal are carried out audio mixing, obtain
Second audio output signal of described second sound channel.
In the present embodiment, using the low frequency signal superposition of original left and right acoustic channels the low frequency signal that processed by DRC as a left side
The low frequency signal of R channel so that the low frequency signal of left and right acoustic channels has all reached the effect strengthened, improves three-dimensional low voice with this
Frequently result of broadcast.
Specifically, the specific implementation of described step 12 is: enter described first audio signal according to default value of frequency point
Row Filtering Processing, obtains described first audio signal intermediate frequency point value and is less than the first low frequency signal and the frequency of described default value of frequency point
Value is more than or equal to the first high frequency signal of described default value of frequency point, and believes described second audio frequency according to default value of frequency point
Number be filtered processing, obtain described second audio signal intermediate frequency point value less than the second low frequency signal of described default value of frequency point and
Value of frequency point is more than or equal to the second high frequency signal of described default value of frequency point.
It should be noted that this step 12 is main it will be realized that utilize default value of frequency point to realize in L channel and R channel
The low frequency of audio signal and the separation of medium-high frequency, this default value of frequency point is the filtering frequency that user is arranged voluntarily, this filtering frequency
Point can arrange targetedly according to the difference of the cavity on audio-frequence player device and loudspeaker, such as carry out low frequency and in
During the separation of high-frequency signal, use filtering that 800Hz signal below being judged to, low frequency signal, 800Hz and above judgement are
High frequency signal.
The most in actual applications, the process that implements of the control method that this audio frequency exports is illustrated.
As it is shown on figure 3, the low pass filter that stereo left channel signal is by 800Hz, obtain L channel after filtering low
Frequently signal, because this low pass filter can retain the low frequency signal less than 800Hz, so, stereo left channel signal is deducted this
Low frequency signal just can get the high frequency signal of stereo left channel；In like manner, the stereo right-channel signals low pass by 800Hz
Wave filter, obtains R channel low frequency signal after filtering, stereo right-channel signals deducts this R channel low frequency signal and just may be used
Obtain the high frequency signal of stereo R channel；Then carry out at the superposition of L channel low frequency signal and R channel low frequency signal
Reason, synthesizes one group of low frequency signal, the low frequency signal after superposition carries out DRC process, first arranges signal threshold value, to exceeding threshold
The signal of value utilizes signal gain to suppress, and utilizes signal gain to promote to less than the signal of threshold value, then to process
After signal carry out overall lifting, be finally reached promote small-signal purpose, it is achieved the enhancing of low frequency signal, finally will pass through
The low frequency signal that DRC processes carries out audio mixing with the high frequency signal of L channel and the high frequency signal of R channel respectively, obtains a left side
The output audio signal of sound channel and the output audio signal of R channel.
It should be noted that user can arrange the different threshold value of many groups and the DRC processing mode of gain combination in advance, in order to
In realizing low frequency is strengthened the control of amplitude.
Also, it should be noted because of above-mentioned be that the audio signal of the audio-frequence player device to twin track processes, because of should
The left and right acoustic channels of audio-frequence player device is separate, so when carrying out the signal processing of left and right acoustic channels, carrying out respectively, right
The audio signal of another sound channel will not be impacted by the process of the audio signal of one sound channel.
It should be noted that the control method of the application embodiment of the present invention, it is achieved that the not structure to audio-frequence player device
Modify with horn single body cavity, it is possible to reach the effect of low frequency lifting；Meanwhile, the signal processing of the present embodiment is prone to
Realize, and do not interfere with stereosonic sound field and locating effect.
3rd embodiment
As shown in Figure 4 and Figure 5, the control device of the audio frequency output of the embodiment of the present invention, including:
Acquisition module 41, for obtaining the first audio signal and second audio signal of second sound channel of the first sound channel；
First processing module 42, for described first audio signal is filtered process, respectively obtains the first low frequency letter
Number and the first high frequency signal, and described second audio signal is filtered process, respectively obtain the second low frequency signal and
Second high frequency signal；
Laminating module 43, for described first low frequency signal and described second low frequency signal being overlapped, obtains the 3rd
Audio signal；
Mix module 44, for described 3rd audio signal and described first high frequency signal are carried out audio mixing, obtains institute
State the first audio output signal of the first sound channel, and described 3rd audio signal is mixed with described second high frequency signal
Sound, obtains the second audio output signal of described second sound channel.
Specifically, described first processing module 42 is used for:
It is filtered processing to described first audio signal according to default value of frequency point, obtains described first audio signal intermediate frequency
Point value is more than or equal in the first of described default value of frequency point less than the first low frequency signal and the value of frequency point of described default value of frequency point
High-frequency signal, and be filtered processing to described second audio signal according to default value of frequency point, obtain described second audio frequency letter
Number intermediate frequency point value less than the second low frequency signal of described default value of frequency point and value of frequency point more than or equal to described default value of frequency point
Second high frequency signal.
Specifically, described laminating module 43 is used for:
Described first low frequency signal and described second low frequency signal are carried out the overlap-add procedure of identical frequency, obtains the 3rd sound
Frequently signal.
Alternatively, the control method of described audio frequency output, also include:
Second processing module 45, for according to predetermined threshold value and gain, carries out dynamic range to described 3rd audio signal
Control processes, the 3rd audio signal after being processed.
It should be noted that this device embodiment is the device corresponding with above-mentioned control method, above-mentioned control method
All implementations, all be applicable to this device embodiment, also can reach identical technique effect.
4th embodiment
The embodiment of the present invention also provides for a kind of audio-frequence player device, including the control device of above-mentioned audio frequency output.
It should be noted that this audio-frequence player device can be that all are permissible for mobile phone, MP3, panel computer, home theater etc.
Realize the equipment that audio frequency is play.
It should be noted that be provided with the audio-frequence player device controlling device of audio frequency output, improve stereo low frequency
Result of broadcast, improves the experience of user.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person for the art comes
Saying, can also make some improvements and modifications under without departing from principle premise of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (9)
1. the control method of an audio frequency output, it is characterised in that including:
Obtain the first audio signal of the first sound channel and the second audio signal of second sound channel；
It is filtered described first audio signal processing, respectively obtains the first low frequency signal and the first high frequency signal, and
It is filtered described second audio signal processing, respectively obtains the second low frequency signal and the second high frequency signal；
Described first low frequency signal and described second low frequency signal are overlapped, obtain the 3rd audio signal；
Described 3rd audio signal and described first high frequency signal are carried out audio mixing, obtains the first audio frequency of described first sound channel
Output signal, and described 3rd audio signal and described second high frequency signal are carried out audio mixing, obtain described second sound channel
The second audio output signal.
The control method of audio frequency the most according to claim 1 output, it is characterised in that described to described first audio signal
It is filtered processing, respectively obtains the first low frequency signal and the first high frequency signal, and described second audio signal is carried out
Filtering Processing, the step respectively obtaining the second low frequency signal and the second high frequency signal includes:
It is filtered processing to described first audio signal according to default value of frequency point, obtains described first audio signal intermediate frequency point value
The first medium-high frequency of described default value of frequency point it is more than or equal to less than the first low frequency signal of described default value of frequency point and value of frequency point
Signal, and be filtered processing to described second audio signal according to default value of frequency point, obtain in described second audio signal
Value of frequency point is more than or equal to the second of described default value of frequency point less than the second low frequency signal and the value of frequency point of described default value of frequency point
High frequency signal.
The control method of audio frequency the most according to claim 1 output, it is characterised in that described by described first low frequency signal
Being overlapped with described second low frequency signal, the step obtaining the 3rd audio signal includes:
Described first low frequency signal and described second low frequency signal are carried out the overlap-add procedure of identical frequency, obtains the 3rd audio frequency letter
Number.
The control method of audio frequency the most according to claim 1 output, it is characterised in that described by described first low frequency letter
Number and described second low frequency signal be overlapped, after obtaining the step of the 3rd audio signal, described audio frequency output controlling party
Method also includes:
According to predetermined threshold value and gain, described 3rd audio signal is carried out dynamic range control process, after being processed
Three audio signals.
5. the control device of an audio frequency output, it is characterised in that including:
Acquisition module, for obtaining the first audio signal and second audio signal of second sound channel of the first sound channel；
First processing module, processes for being filtered described first audio signal, respectively obtains the first low frequency signal and the
One high frequency signal, and be filtered described second audio signal processing, respectively obtain in the second low frequency signal and second
High-frequency signal；
Laminating module, for described first low frequency signal and described second low frequency signal being overlapped, obtains the 3rd audio frequency letter
Number；
Mix module, for described 3rd audio signal and described first high frequency signal are carried out audio mixing, obtains described first
First audio output signal of sound channel, and described 3rd audio signal and described second high frequency signal are carried out audio mixing,
The second audio output signal to described second sound channel.
The control device of audio frequency the most according to claim 5 output, it is characterised in that described first processing module is used for:
It is filtered processing to described first audio signal according to default value of frequency point, obtains described first audio signal intermediate frequency point value
The first medium-high frequency of described default value of frequency point it is more than or equal to less than the first low frequency signal of described default value of frequency point and value of frequency point
Signal, and be filtered processing to described second audio signal according to default value of frequency point, obtain in described second audio signal
Value of frequency point is more than or equal to the second of described default value of frequency point less than the second low frequency signal and the value of frequency point of described default value of frequency point
High frequency signal.
The control device of audio frequency the most according to claim 5 output, it is characterised in that described laminating module is used for:
Described first low frequency signal and described second low frequency signal are carried out the overlap-add procedure of identical frequency, obtains the 3rd audio frequency letter
Number.
The control device of audio frequency the most according to claim 5 output, it is characterised in that also include:
Second processing module, for according to predetermined threshold value and gain, is carried out at dynamic range control described 3rd audio signal
Reason, the 3rd audio signal after being processed.
9. an audio-frequence player device, it is characterised in that include the control that the audio frequency as described in any one of claim 5 to 8 exports
Device processed.
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| CN111984220A (en) * | 2019-05-23 | 2020-11-24 | 海信视像科技股份有限公司 | Screen sounding device and method |
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| CN113382345A (en) * | 2020-03-10 | 2021-09-10 | 新唐科技股份有限公司 | Audio processing device and method |
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