CN106792360A - One kind plays stereosonic method, device and terminal - Google Patents
One kind plays stereosonic method, device and terminal Download PDFInfo
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- CN106792360A CN106792360A CN201710083845.5A CN201710083845A CN106792360A CN 106792360 A CN106792360 A CN 106792360A CN 201710083845 A CN201710083845 A CN 201710083845A CN 106792360 A CN106792360 A CN 106792360A
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- impedance value
- acoustic channels
- right acoustic
- stereo
- output signal
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The present invention provides a kind of stereosonic method of broadcasting, device and terminal, and the method includes：Obtain the load impedance value of the audio output interface of the terminal；According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time, the audio signal to the left and right acoustic channels carries out stereo process, obtains the output signal of the left and right acoustic channels respectively；The output signal of the left and right acoustic channels is exported by the audio output interface.The present invention is by the ratio according to the common ground impedance value between left and right acoustic channels and the load impedance value of the audio output interface of terminal, audio signal to left and right acoustic channels carries out stereo process respectively, obtain the output signal of left and right acoustic channels, so, when substantially reducing stereo source of sound broadcasting, crosstalk problem between sound channel, while improving the crosstalk problem under different loads stereo equipment, lifts stereophonic effect and Consumer's Experience.
Description
Technical field
It is more particularly to a kind of to play stereosonic method, device and terminal the present invention relates to audio play-back technology field.
Background technology
With intelligent terminal continue to develop with popularization, the function of intelligent terminal is stronger and stronger, it has also become people's work,
Indispensable " sharp weapon " are lived and entertain, while consumer demand is met, people also propose higher to intelligent terminal
It is required that.Such as, many people focus on its auditory effect when audio file is listened using intelligent terminal, more and more now.
But, when the stereo equipment stereo source of sound of broadcasting is accessed, the cross-talk between sound channel can influence stereosonic to terminal
Effect, in sense of hearing, stereosonic positioning, spatial impression and knot seeing all can be impacted, can then influence Consumer's Experience.
The content of the invention
Stereosonic method, device and terminal are played it is an object of the invention to provide one kind, to solve in the prior art
Terminal when accessing stereo equipment and playing stereo source of sound, the crosstalk problem between sound channel.
On the one hand, the embodiment of the present invention provides a kind of stereosonic method of broadcasting, including：
Obtain the load impedance value of the audio output interface of the terminal；
According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time, to institute
State the audio signal of left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；
The output signal of the left and right acoustic channels is exported by the audio output interface.
On the other hand, the embodiment of the present invention also provides a kind of stereosonic device of broadcasting, including：
Acquisition module, the load impedance value of the audio output interface for obtaining terminal；
Processing module, for according between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time
Ratio K, carry out stereo process respectively to the audio signal of the left and right acoustic channels, obtain the output signal of the left and right acoustic channels；
Output module, the output signal for exporting the left and right acoustic channels by the audio output interface.
Another further aspect, the embodiment of the present invention also provides a kind of terminal, including broadcasting as described in above-mentioned embodiment is stereo
Device.
So, in the such scheme of the embodiment of the present invention, by according to the common ground impedance value between left and right acoustic channels and terminal
The ratio of the load impedance value of audio output interface, the audio signal to left and right acoustic channels carries out stereo process respectively, obtains left and right
The output signal of sound channel, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, while improving different negative
The crosstalk problem under stereo equipment is carried, stereophonic effect and Consumer's Experience is lifted.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below by institute in the description to the embodiment of the present invention
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the flow chart of the stereosonic method of broadcasting of first embodiment of the invention；
Fig. 2 is the flow chart of the stereosonic method of broadcasting of first embodiment of the invention；
Fig. 3 be third embodiment of the invention in play one of structured flowchart of stereosonic device；
Fig. 4 be third embodiment of the invention in play stereosonic device structured flowchart two；
Fig. 5 is the structured flowchart of terminal in fourth embodiment of the invention；
Fig. 6 is the structured flowchart of terminal in fifth embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
First embodiment
As shown in figure 1, the flow chart of the stereosonic method of broadcasting for first embodiment of the invention.The method is applied to end
End.Below should figure illustrate the implementation process of the method.
Step 101, obtains the load impedance value of the audio output interface of the terminal.
Here, the load of the audio output interface (such as earphone jack) of access terminal is stereo equipment (such as earphone).
Here, load impedance value is the impedance value of the stereo equipment of the audio output interface of access terminal.
It should be noted that, the specific implementation of the load impedance value of the audio output interface of terminal is obtained in step 101
Can have various, wherein can preferably include following two：
Mode one：Impedance detection is carried out to stereo equipment, the impedance value of the stereo equipment is obtained.
Explanation is needed exist for, terminal there need to be impedance detection function, can detect the audio output interface of access terminal
Stereo equipment impedance value.
Here, the impedance detection function of terminal can be by the built-in chip with impedance detection function or unit come real
It is existing；Can also be realized by installing the application program with impedance detection function.
Mode two：According to the parameter information of the pre-recorded stereo equipment, the resistance of the stereo equipment is obtained
Anti- value.
It should be noted that being prerecorded with the ginseng of the stereo equipment of the preset kind compatible with the terminal in terminal
Number information, wherein, parameter information includes：Model, load of stereo equipment etc..
Here, the parameter of the stereo equipment that can be locally stored in terminal or preset kind is stored by Cloud Server is believed
Breath, is matched by searching, and can obtain the impedance value of the stereo equipment of the audio output interface for accessing the terminal；Terminal can also lead to
The stereo equipment that identification accesses the audio output interface of the terminal is crossed, the parameter letter of the stereo equipment is searched and obtain online
Breath.
Step 102, according to the ratio between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time
Value K, the audio signal to the left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels.
Here, specifically, the impedance value altogether includes：Wiring on the printed circuit board of terminal between left and right acoustic channels is altogether
Contact impedance value and the stereo equipment between the stereo equipment of impedance value, the audio output interface and outside are total to
Ground impedance value sum.
It should be noted that usually, terminal after the completion of production, the cloth on the printed circuit board of terminal between left and right acoustic channels
Line contact impedance value altogether between the stereo equipment of impedance value, audio output interface and outside is just it has been determined that be definite value.
Here it should be noted that, the common ground impedance value of many stereo equipments is zero, such as some the preferable earphones of design, ear
The ground of machine left and right acoustic channels is to distinguish cabling to contacting metal head, and the common ground impedance value of its earphone is zero.
Step 103, the output signal of the left and right acoustic channels is exported by the audio output interface.
Here, the output signal of left and right acoustic channels is exported by audio output interface, is by the audio signal of stereo process.
The output signal largely eliminates the cross-talk between sound channel, greatly promotes the stereophonic effect of the source of sound for playing out.
It is provided in an embodiment of the present invention to play stereosonic method, by according to the common ground impedance value between left and right acoustic channels and end
The ratio of the load impedance value of the audio output interface at end, the audio signal to left and right acoustic channels carries out stereo process respectively, obtains
The output signal of left and right acoustic channels, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, while improving not
With the crosstalk problem under load stereo equipment, stereophonic effect and Consumer's Experience are lifted.
Second embodiment
As shown in Fig. 2 being the flow chart for playing stereosonic method of second embodiment of the invention, the method is applied to end
End.Below should figure illustrate the implementation process of the method.
Step 201, obtains the load impedance value of the audio output interface of the terminal.
Here, the load of the audio output interface (such as earphone jack) of access terminal is stereo equipment (such as earphone).
Here, load impedance value is the impedance value of the stereo equipment of the audio output interface of access terminal.
It should be noted that, the specific implementation of the load impedance value of the audio output interface of terminal is obtained in step 201
Can have various, wherein can preferably include following two：
Mode one：Impedance detection is carried out to stereo equipment, the impedance value of the stereo equipment is obtained.
Explanation is needed exist for, terminal there need to be impedance detection function, can detect the audio output interface of access terminal
Stereo equipment impedance value.
Here, the impedance detection function of terminal can be by the built-in chip with impedance detection function or unit come real
It is existing；Can also be realized by installing the application program with impedance detection function.
Mode two：According to the parameter information of the pre-recorded stereo equipment, the resistance of the stereo equipment is obtained
Anti- value.
It should be noted that being prerecorded with the ginseng of the stereo equipment of the preset kind compatible with the terminal in terminal
Number information, wherein, parameter information includes：Model, load of stereo equipment etc..
Here, the parameter of the stereo equipment that can be locally stored in terminal or preset kind is stored by Cloud Server is believed
Breath, is matched by searching, and can obtain the impedance value of the stereo equipment of the audio output interface for accessing the terminal；Terminal can also lead to
The stereo equipment that identification accesses the audio output interface of the terminal is crossed, the parameter letter of the stereo equipment is searched and obtain online
Breath.
Step 202, obtains the first amplitude voltage U of the left channel audio signal of stereo source of soundLBelieve with right audio channel
Number the second amplitude voltage UR。
Here, stereo source of sound can be storage or the stereo sound frequency file being buffered in terminal.
It should be noted that the first amplitude voltage U of the left channel audio signal of stereo source of soundLBelieve with right audio channel
Number the second amplitude voltage URIt is the magnitude of voltage of continuous change.
Step 203, according to (1+K) UL+KUR, the output signal of the L channel after stereo process is calculated, and, according to
KUL+(1+K)UR, the output signal of the R channel after stereo process is calculated, wherein, between K is the left and right acoustic channels being obtained ahead of time
Common ground impedance value and the load impedance value between ratio.
Here, specifically, impedance value includes altogether：Wiring impedance altogether on the printed circuit board of terminal between left and right acoustic channels
The common ground resistance of contact impedance value and the stereo equipment between the stereo equipment of value, the audio output interface and outside
Anti- value sum.
It should be noted that, after being processed according to the calculating of above-mentioned steps 203, the output signal for obtaining can largely disappear
Except the cross-talk between sound channel, the stereophonic effect of the source of sound for playing out is greatly promoted.
The specific reasoning that the computing formula of left and right acoustic channels in the step is specifically described below obtains process.
Here, if load impedance value is R, impedance value is r altogether, and the voltage at impedance value two ends is V altogetherr, to L channel
The weighting of output is output as a UL+b UR, symmetrically, b U are output as to R channel weightingL+aUR, wherein a, b be weighting system
Number, ULAnd URThe respectively amplitude voltage of left and right acoustic channels.
It should be noted that, according to circuit theory, point electric current on L channel load (impedance value is R) is loaded with R channel
Point electric current sum on (impedance value is R) is equal to the current value of ground terminal altogether, i.e.,：
(a UL+b UR-Vr)/R+(b UL+a UR-Vr)/R=Vr/r；
Obtain, formula ()：Vr=r (a+b) (UL+UR)/(2r+R)；
In addition, left and right acoustic channels are by after stereo process, the pressure difference in the load of its left and right acoustic channels should be respectively left and right acoustic channels
Amplitude voltage, i.e.,：
Formula (two)：a UL+b UR-Vr=UL；
Formula (three)：b UL+a UR-Vr=UR。
So, obtained in formula () being substituted into formula (two), a=1+r/R, b=r/R；
Equally also obtained during formula () is substituted into formula (three), a=1+r/R, b=r/R.
It should be noted that r/R is the ratio K between common ground the impedance value r and load impedance value R between left and right acoustic channels,
That is, K=r/R.
Therefore, the left channel audio signal of stereo source of sound, through (1+K) UL+KURStereo process after output signal disappeared
The crosstalk that the cross-talk and left channel audio signal brought except R channel are produced in itself, its output voltage is still for original is stereo
The L channel amplitude voltage of source of sound；
And the right channel audio signal of stereo source of sound, through KUL+(1+K)URStereo process after output signal eliminate
The crosstalk that the cross-talk and right channel audio signal that elimination L channel brings are produced, its output voltage in itself is still former solid
The R channel amplitude voltage of sound source.
Step 204, the output signal to the left and right acoustic channels is amplified treatment.
Here, the output signal of L channel and the audio signal of R channel are by the audio letter after stereo process
Number.
Here the output signal of left and right acoustic channels is amplified is to obtain good audio at audio output interface end
Signal.
Step 205, the output signal of the left and right acoustic channels is exported by the audio output interface.
It should be noted that the output signal of the left and right acoustic channels in this step is by the audio signal after enhanced processing.
Here, the output signal of left and right acoustic channels is exported by audio output interface, is by the audio signal of stereo process.
The output signal largely eliminates the cross-talk between sound channel, here, not only dry including the cross-talk from other sound channels
Disturb, also the cross-talk including this sound channel itself, greatly promote the stereophonic effect of the source of sound for playing out.
It is provided in an embodiment of the present invention to play stereosonic method, by according to the common ground impedance value between left and right acoustic channels and end
The ratio of the load impedance value of the audio output interface at end, the audio signal to left and right acoustic channels carries out stereo process respectively, obtains
The output signal of left and right acoustic channels, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, specifically, not only
The crosstalk problem from other sound channels is substantially reduced, the crosstalk problem of this sound channel itself is also substantially reduced, while improving different negative
The crosstalk problem under stereo equipment is carried, stereophonic effect and Consumer's Experience is lifted.
3rd embodiment
As shown in figure 3, the embodiment of the present invention also provides a kind of stereosonic device 300 of broadcasting, including：
Acquisition module 301, the load impedance value of the audio output interface for obtaining terminal；
Processing module 302, for according to the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time
Between ratio K, carry out stereo process respectively to the audio signal of the left and right acoustic channels, obtain the output letter of the left and right acoustic channels
Number；
Output module 303, the output signal for exporting the left and right acoustic channels by the audio output interface.
Here specifically, the impedance value altogether includes：Wiring on the printed circuit board of terminal between left and right acoustic channels is altogether
Contact impedance value and the stereo equipment between the stereo equipment of impedance value, the audio output interface and outside are total to
Ground impedance value sum.
Specifically, as shown in figure 4, the acquisition module 301 also may particularly include：
First acquisition unit 3011, for carrying out impedance detection to stereo equipment, obtains the resistance of the stereo equipment
Anti- value；
Second acquisition unit 3012, for the parameter information according to the pre-recorded stereo equipment, obtains described
The impedance value of stereo equipment.
Specifically, the processing module 302 of the embodiment of the present invention also may particularly include：
3rd acquiring unit 3021, the first amplitude voltage U of the left channel audio signal for obtaining stereo source of soundLWith
Second amplitude voltage U of right channel audio signalR；
Computing unit 3022, for according to (1+K) UL+KUR, the output signal of the L channel after stereo process is calculated,
And, according to KUL+(1+K)UR, it is calculated the output signal of the R channel after stereo process.
Specifically, as shown in figure 4, the stereosonic device of broadcasting may also include：
Enhanced processing module 304, for exporting the output signal of the left and right acoustic channels by the audio output interface
Before, the output signal to the left and right acoustic channels is amplified treatment.
It is provided in an embodiment of the present invention to play stereosonic device, by according to the common ground impedance value between left and right acoustic channels and end
The ratio of the load impedance value of the audio output interface at end, the audio signal to left and right acoustic channels carries out stereo process respectively, obtains
The output signal of left and right acoustic channels, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, while improving not
With the crosstalk problem under load stereo equipment, stereophonic effect and Consumer's Experience are lifted.
Fourth embodiment
As shown in figure 5, being the structured flowchart of terminal in fourth embodiment of the invention.Mobile terminal 400 shown in Fig. 5, bag
Include：
At least one processor 401, memory 402, at least one network interface 404 and user interface 403.Mobile terminal
Each component in 400 is coupled by bus system 405.It is understood that bus system 405 be used for realize these components it
Between connection communication.Bus system 405 in addition to including data/address bus, also including power bus, controlling bus and status signal
Bus.But for the sake of for clear explanation, various buses are all designated as bus system 405 in Figure 5.
Wherein, user interface 403 can include display, keyboard or pointing device (for example, mouse, trace ball
(trackball), touch-sensitive plate or touch-screen etc..
It is appreciated that the memory 402 in the embodiment of the present invention can be volatile memory or nonvolatile memory,
Or may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read-only storage (Read-
Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), the read-only storage of erasable programmable
Device (Erasable PROM, EPROM), Electrically Erasable Read Only Memory (Electrically EPROM, EEPROM) or
Flash memory.Volatile memory can be random access memory (Random Access Memory, RAM), and it is used as outside height
Speed caching.By exemplary but be not restricted explanation, the RAM of many forms can use, such as static RAM
(Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory
(Synchronous DRAM, SDRAM), double data speed synchronous dynamic RAM (Double Data Rate
SDRAM, DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links
Dynamic random access memory (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct
Rambus RAM, DRRAM).The memory 402 of system and method described herein be intended to including but not limited to these and it is any its
It is adapted to the memory of type.
In some embodiments, memory 402 stores following element, can perform module or data structure, or
Person their subset, or their superset：Operating system 4021 and application program 4022.
Wherein, operating system 4021, comprising various system programs, such as ccf layer, core library layer, driving layer etc. are used for
Realize various basic businesses and process hardware based task.Application program 4022, comprising various application programs, such as media
Player (Media Player), browser (Browser) etc., for realizing various applied business.Realize the embodiment of the present invention
The program of method may be embodied in application program 4022.
In one embodiment of this invention, by call memory 402 store program or instruction, can be specifically
The program stored in application program 4022 or instruction, processor 401 are used for the load of the audio output interface for obtaining the terminal
Impedance value；According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time, to described
The audio signal of left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；It is defeated by the audio
Outgoing interface exports the output signal of the left and right acoustic channels.
Explanation is needed exist for, the common ground impedance value between load impedance value and left and right acoustic channels can be stored in memory
In 402, processor 401 can call the load impedance value in memory 402 and the common ground impedance value between left and right acoustic channels.
Specifically, the impedance value altogether includes：Wiring impedance altogether on the printed circuit board of terminal between left and right acoustic channels
The common ground resistance of contact impedance value and the stereo equipment between the stereo equipment of value, the audio output interface and outside
Anti- value sum.
Need exist for explanation, wiring on the printed circuit board of terminal between left and right acoustic channels impedance value, the sound altogether
The common ground impedance value of contact impedance value and the stereo equipment between the stereo equipment of frequency output interface and outside can be deposited
It is stored in memory 402, processor 401 can be called in memory 402, processor 401 can call the terminal in memory 402
Wiring on printed circuit board between left and right acoustic channels is altogether between the stereo equipment of impedance value, the audio output interface and outside
The common ground impedance value of contact impedance value and the stereo equipment.
Alternatively, processor 401 is additionally operable to：Impedance detection is carried out to stereo equipment, the stereo equipment is obtained
Impedance value；Or according to the parameter information of the pre-recorded stereo equipment, obtain the impedance value of the stereo equipment.
Alternatively, processor 401 can also be specifically for：Obtain the first amplitude of the left channel audio signal of stereo source of sound
Voltage ULWith the second amplitude voltage U of right channel audio signalR；According to (1+K) UL+KUR, it is calculated the left side after stereo process
The output signal of sound channel, and, according to KUL+(1+K)UR, it is calculated the output signal of the R channel after stereo process.
Alternatively, processor 401 can also be specifically for：The left and right acoustic channels are being exported by the audio output interface
Before output signal, the output signal to the left and right acoustic channels is amplified treatment.
Mobile terminal of the invention such as can be mobile phone, panel computer, personal digital assistant (Personal Digital
Assistant, PDA) or vehicle-mounted computer etc. mobile terminal.
Mobile terminal 400 can realize each process of mobile terminal realization in previous embodiment, to avoid repeating, here
Repeat no more.
The mobile terminal 400 of the embodiment of the present invention, is used to obtain the audio output interface of the terminal by processor 401
Load impedance value；According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time,
Audio signal to the left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；By described
Audio output interface exports the output signal of the left and right acoustic channels, in this way, according to common ground impedance value and terminal between left and right acoustic channels
Audio output interface load impedance value ratio, the audio signal to left and right acoustic channels carries out stereo process, obtains a left side respectively
The output signal of R channel, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, while improving different
Crosstalk problem under load stereo equipment, lifts stereophonic effect and Consumer's Experience.
The method that the embodiments of the present invention are disclosed can apply in processor 401, or real by processor 401
It is existing.Processor 401 is probably a kind of IC chip, the disposal ability with signal.In implementation process, the above method
Each step can be completed by the instruction of the integrated logic circuit of the hardware in processor 401 or software form.Above-mentioned place
Reason device 401 can be general processor, digital signal processor (Digital Signal Processor, DSP), special integrated
Circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field
Programmable Gate Array, FPGA) or other PLDs, discrete gate or transistor logic,
Discrete hardware components.Can realize or perform disclosed each method in the embodiment of the present invention, step and logic diagram.It is general
Processor can be microprocessor or the processor can also be any conventional processor etc..With reference to embodiment of the present invention institute
The step of disclosed method, can be embodied directly in hardware decoding processor and perform completion, or with the hardware in decoding processor
And software module combination performs completion.Software module may be located at random access memory, and flash memory, read-only storage may be programmed read-only
In the ripe storage medium in this area such as memory or electrically erasable programmable memory, register.The storage medium is located at
Memory 402, processor 401 reads the information in memory 402, with reference to the step of its hardware completion above method.
It is understood that embodiments described herein can with hardware, software, firmware, middleware, microcode or its
Combine to realize.Realized for hardware, processing unit can be realized in one or more application specific integrated circuits (Application
Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing,
DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic
Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general processor,
In controller, microcontroller, microprocessor, other electronic units for performing herein described function or its combination.
Realized for software, can be realized by performing the module (such as process, function etc.) of function described herein herein
Described technology.Software code is storable in memory and by computing device.Memory can within a processor or
Realize processor outside.
5th embodiment
As shown in fig. 6, being the structured flowchart of terminal in fifth embodiment of the invention.Mobile terminal 500 shown in Fig. 6, bag
Include：
Radio frequency (Radio Frequency, RF) circuit 510, memory 520, input block 530, display unit 540, place
Reason device 560, voicefrequency circuit 570, WiFi (Wireless Fidelity) module 580 and power supply 590.
Wherein, input block 530 can be used to receive the numeral or character information of user input, and produce and mobile terminal
500 user is set and the relevant signal input of function control.Specifically, in the embodiment of the present invention, the input block 530 can
With including contact panel 531.Contact panel 531, also referred to as touch-screen, can collect user thereon or neighbouring touch operation
(such as user uses the operations of any suitable object or annex on contact panel 531 such as finger, stylus), and according to advance
The formula of setting drives corresponding attachment means.Optionally, contact panel 531 may include touch detecting apparatus and touch controller
Two parts.Wherein, touch detecting apparatus detect the touch orientation of user, and detect the signal that touch operation brings, by signal
Send touch controller to；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate,
Give the processor 560 again, and the order sent of receiving processor 560 and can be performed.Furthermore, it is possible to using resistance-type,
The polytypes such as condenser type, infrared ray and surface acoustic wave realize contact panel 531.Except contact panel 531, input block
530 can also include other input equipments 532, and other input equipments 532 can include but is not limited to physical keyboard, function key
One or more in (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..
Wherein, display unit 540 can be used for display by the information of user input or be supplied to information and the movement of user
The various menu interfaces of terminal 500.Display unit 540 may include display panel 541, optionally, can use LCD or organic hairs
The forms such as optical diode (Organic Light-Emitting Diode, OLED) configure display panel 541.
It should be noted that contact panel 531 can cover display panel 541, touch display screen is formed, when touch display screen inspection
Measure thereon or after neighbouring touch operation, processor 560 is sent to determine the type of touch event, with preprocessor
560 provide corresponding visual output according to the type of touch event in touch display screen.
Touch display screen includes Application Program Interface viewing area and conventional control viewing area.The Application Program Interface viewing area
And the arrangement mode of the conventional control viewing area is not limited, can be arranged above and below, left-right situs etc. can distinguish two and show
Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with
The interface element such as the icon comprising at least one application program and/or widget desktop controls.The Application Program Interface viewing area
It can also be the empty interface not comprising any content.The conventional control viewing area be used for show utilization rate control higher, for example,
Application icons such as settings button, interface numbering, scroll bar, phone directory icon etc..
Wherein processor 560 is the control centre of mobile terminal 500, using various interfaces and connection whole mobile phone
Various pieces, by running or performing software program and/or module of the storage in first memory 521, and call storage
Data in second memory 522, perform the various functions and processing data of mobile terminal 500, so as to mobile terminal 500
Carry out integral monitoring.Optionally, processor 560 may include one or more processing units.
In one embodiment of this invention, by calling the software program and/or module stored in the first memory 521
And/or the data in the second memory 522, processor 560 be used for obtain the terminal audio output interface load resistance
Anti- value；According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time, to the left side
The audio signal of R channel carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；By the audio output
Interface exports the output signal of the left and right acoustic channels.
It should be noted that the common ground impedance value between load impedance value and left and right acoustic channels can be stored in second memory
In 522, processor 560 can call the load impedance value in second memory 522 and the common ground impedance value between left and right acoustic channels.
Specifically, the impedance value altogether includes：Wiring impedance altogether on the printed circuit board of terminal between left and right acoustic channels
The common ground resistance of contact impedance value and the stereo equipment between the stereo equipment of value, the audio output interface and outside
Anti- value sum.
Need exist for explanation, wiring on the printed circuit board of terminal between left and right acoustic channels impedance value, the sound altogether
The common ground impedance value of contact impedance value and the stereo equipment between the stereo equipment of frequency output interface and outside can be deposited
It is stored in second memory 522, processor 560 can call left and right sound on the printed circuit board of the terminal in second memory 522
Wiring between road contact impedance value altogether between the stereo equipment of impedance value, the audio output interface and outside and described
The common ground impedance value of stereo equipment.
Alternatively, processor 560 can also be specifically for：Impedance detection is carried out to stereo equipment, obtains described stereo
The impedance value of equipment；Or according to the parameter information of the pre-recorded stereo equipment, obtain the resistance of the stereo equipment
Anti- value.
Alternatively, processor 560 can also be specifically for：Obtain the first amplitude of the left channel audio signal of stereo source of sound
Voltage ULWith the second amplitude voltage U of right channel audio signalR；According to (1+K) UL+KUR, it is calculated the left side after stereo process
The output signal of sound channel, and, according to KUL+(1+K)UR, it is calculated the output signal of the R channel after stereo process.
Optionally, processor 560 can also be specifically for：The left and right acoustic channels are being exported by the audio output interface
Before output signal, the output signal to the left and right acoustic channels is amplified treatment.
Mobile terminal provided in an embodiment of the present invention 500, processor 560 is used to obtain the audio output interface of the terminal
Load impedance value；According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time,
Audio signal to the left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；By described
Audio output interface exports the output signal of the left and right acoustic channels, in this way, according to common ground impedance value and terminal between left and right acoustic channels
Audio output interface load impedance value ratio, the audio signal to left and right acoustic channels carries out stereo process, obtains a left side respectively
The output signal of R channel, so, when substantially reducing stereo source of sound broadcasting, the crosstalk problem between sound channel, while improving different
Crosstalk problem under load stereo equipment, lifts stereophonic effect and Consumer's Experience.
Mobile terminal of the invention such as can be mobile phone, panel computer, personal digital assistant (Personal Digital
Assistant, PDA) or vehicle-mounted computer etc. mobile terminal.
Mobile terminal 500 can realize each process of mobile terminal realization in previous embodiment, to avoid repeating, here
Repeat no more.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Unit and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Described function, but this realization can be realized it is not considered that exceeding using distinct methods to each specific application
The scope of the present invention.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In embodiment provided herein, it should be understood that disclosed apparatus and method, can be by other
Mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, is only
A kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of device or unit by some interfaces
Connect, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.
If the function is to realize in the form of SFU software functional unit and as independent production marketing or when using, can be with
Storage is in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used to so that a computer equipment (can be individual
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
One of ordinary skill in the art will appreciate that all or part of flow in realizing above-described embodiment method, can be
The hardware of correlation is controlled to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (11)
1. it is a kind of to play stereosonic method, it is applied to terminal, it is characterised in that including：
Obtain the load impedance value of the audio output interface of the terminal；
According to the ratio K between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time, to the left side
The audio signal of R channel carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；
The output signal of the left and right acoustic channels is exported by the audio output interface.
2. it is according to claim 1 to play stereosonic method, it is characterised in that the impedance value altogether includes：Terminal
Printed circuit board on wiring between left and right acoustic channels altogether between the stereo equipment of impedance value, the audio output interface and outside
Contact impedance value and the stereo equipment common ground impedance value sum.
3. it is according to claim 1 to play stereosonic method, it is characterised in that the audio of the acquisition terminal is defeated
The step of load impedance value of outgoing interface, includes：
Impedance detection is carried out to stereo equipment, the impedance value of the stereo equipment is obtained；Or
According to the parameter information of the pre-recorded stereo equipment, the impedance value of the stereo equipment is obtained.
4. it is according to claim 1 to play stereosonic method, it is characterised in that according between the left and right acoustic channels being obtained ahead of time
Common ground impedance value and the load impedance value between ratio K, the audio signal to the left and right acoustic channels carries out audio mixing respectively
The step for the treatment of, output signal for obtaining the left and right acoustic channels, includes：
Obtain the first amplitude voltage U of the left channel audio signal of stereo source of soundLWith the second amplitude electricity of right channel audio signal
Pressure UR；
According to (1+K) UL+KUR, the output signal of the L channel after stereo process is calculated, and, according to KUL+(1+K)UR,
It is calculated the output signal of the R channel after stereo process.
5. it is according to claim 1 to play stereosonic method, it is characterised in that described by the audio output interface
Before the step of exporting the output signal of the left and right acoustic channels, methods described also includes：
Output signal to the left and right acoustic channels is amplified treatment.
6. it is a kind of to play stereosonic device, it is characterised in that including：
Acquisition module, the load impedance value of the audio output interface for obtaining terminal；
Processing module, for according to the ratio between the common ground impedance value and the load impedance value between the left and right acoustic channels being obtained ahead of time
Value K, the audio signal to the left and right acoustic channels carries out stereo process respectively, obtains the output signal of the left and right acoustic channels；
Output module, the output signal for exporting the left and right acoustic channels by the audio output interface.
7. it is according to claim 6 to play stereosonic device, it is characterised in that the impedance value altogether includes：Terminal
Printed circuit board on wiring between left and right acoustic channels altogether between the stereo equipment of impedance value, the audio output interface and outside
Contact impedance value and the stereo equipment common ground impedance value sum.
8. it is according to claim 6 to play stereosonic device, it is characterised in that the acquisition module includes：
First acquisition unit, for carrying out impedance detection to stereo equipment, obtains the impedance value of the stereo equipment；
Second acquisition unit, for the parameter information according to the pre-recorded stereo equipment, obtains described stereo set
Standby impedance value.
9. it is according to claim 6 to play stereosonic device, it is characterised in that the processing module includes：
3rd acquiring unit, the first amplitude voltage U of the left channel audio signal for obtaining stereo source of soundLWith R channel sound
Second amplitude voltage U of frequency signalR；
Computing unit, for according to (1+K) UL+KUR, the output signal of the L channel after stereo process is calculated, and, root
According to KUL+(1+K)UR, it is calculated the output signal of the R channel after stereo process.
10. it is according to claim 6 to play stereosonic device, it is characterised in that described device also includes：
Enhanced processing module is right for before the output signal for exporting the left and right acoustic channels by the audio output interface
The output signal of the left and right acoustic channels is amplified treatment.
A kind of 11. terminals, it is characterised in that including：The stereosonic device of broadcasting as described in any one of claim 6~10.
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| CN201710083845.5A CN106792360B (en) | 2017-02-16 | 2017-02-16 | It is a kind of to play stereosonic method, apparatus and terminal |
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| CN201710083845.5A CN106792360B (en) | 2017-02-16 | 2017-02-16 | It is a kind of to play stereosonic method, apparatus and terminal |
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| US20040260416A1 (en) * | 2003-06-10 | 2004-12-23 | Marc Kellom | Audio amplifier local interface system |
| CN101359764A (en) * | 2007-07-30 | 2009-02-04 | 宏达国际电子股份有限公司 | Earphone antenna and connector thereof |
| CN204069261U (en) * | 2014-08-04 | 2014-12-31 | 东莞市今联实业有限公司 | A kind of 3D is around sound stereophone |
| CN105592379A (en) * | 2016-02-17 | 2016-05-18 | 惠州Tcl移动通信有限公司 | Earphone power supply control method, earphone power supply control system, and mobile terminal |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040260416A1 (en) * | 2003-06-10 | 2004-12-23 | Marc Kellom | Audio amplifier local interface system |
| CN101359764A (en) * | 2007-07-30 | 2009-02-04 | 宏达国际电子股份有限公司 | Earphone antenna and connector thereof |
| CN204069261U (en) * | 2014-08-04 | 2014-12-31 | 东莞市今联实业有限公司 | A kind of 3D is around sound stereophone |
| CN105592379A (en) * | 2016-02-17 | 2016-05-18 | 惠州Tcl移动通信有限公司 | Earphone power supply control method, earphone power supply control system, and mobile terminal |
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| CN106792360B (en) | 2019-07-26 |
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