CN107690026A - A kind of signal processing method and mobile terminal - Google Patents
A kind of signal processing method and mobile terminal Download PDFInfo
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- CN107690026A CN107690026A CN201710698180.9A CN201710698180A CN107690026A CN 107690026 A CN107690026 A CN 107690026A CN 201710698180 A CN201710698180 A CN 201710698180A CN 107690026 A CN107690026 A CN 107690026A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Function (AREA)
Abstract
The invention provides a kind of signal processing method and mobile terminal, methods described includes：Detect whether the first audio signal clipping distortion occurs, wherein first audio signal is audio signal to be played；If there is clipping distortion, clipping distortion wave band in first audio signal, and time cycle corresponding to the clipping distortion wave band are determined；Original wave band corresponding with the time cycle in the second audio signal is obtained, wherein, second audio signal is original audio signal；Clipping distortion wave band in first audio signal is correspondingly replaced using the original wave band, generates the 3rd audio signal.The wave band of clipping distortion occurs using corresponding replace of original audio, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid because of audio signal clipping distortion and caused by noise problem, therefore the usage experience of user can be lifted.
Description
Technical field
The present invention relates to signal processing technology field, more particularly to a kind of signal processing method and mobile terminal.
Background technology
Terminal is that user plays the multimedia files such as song, audiobook, broadcast by audio player and loudspeaker.
When audio signal amplitude to be played is smaller, audio signal can be submerged during the bottom of loudspeaker in itself makes an uproar, and user can not hear institute
The sound of broadcasting.In order to solve the above problems, exported again after audio signal is amplified into processing in the prior art.
In actual application, the maximum output of terminal loudspeaker is limited in one's ability, when audio player puts audio signal
Amplitude after big, more than loudspeaker maximum output when, the situation of audio signal clipping distortion can be caused, ultimately result in audio letter
Number missing, produce noise.
The content of the invention
The invention provides a kind of signal processing method and mobile terminal, to solve present in prior art because audio is believed
Number clipping distortion and the problem of produce noise.
In order to solve the above problems, the invention discloses a kind of signal processing method, methods described includes：Detect the first sound
Whether frequency signal there is clipping distortion, wherein first audio signal is audio signal to be played；If there is clipping distortion, really
Clipping distortion wave band in fixed first audio signal, and time cycle corresponding to the clipping distortion wave band；Obtain second
Original wave band corresponding with the time cycle in audio signal, wherein, second audio signal is original audio signal；Adopt
The clipping distortion wave band in first audio signal is correspondingly replaced with the original wave band, generates the 3rd audio signal.
In order to solve the above problems, the invention also discloses a kind of mobile terminal, the mobile terminal includes：Detect mould
Block, for detecting whether the first audio signal clipping distortion occurs, wherein first audio signal is audio signal to be played；
First determining module, if for there is clipping distortion, clipping distortion wave band in first audio signal is determined, and described cut
Time cycle corresponding to wave distortion wave band；Acquisition module, it is corresponding with the time cycle in the second audio signal for obtaining
Original wave band, wherein, second audio signal is original audio signal；Replacement module, for using the original wave band pair
The clipping distortion wave band in first audio signal should be replaced, generates the 3rd audio signal.
In order to solve the above problems, the invention also discloses a kind of mobile terminal, including：Memory, processor and storage
On the memory and the signal handler that can run on the processor, the signal handler is by the processing
The step of described signal processing method is realized when device performs.
It is described computer-readable the invention also discloses a kind of computer-readable recording medium in order to solve the above problems
Signal handler is stored with storage medium, described signal transacting is realized when the signal handler is executed by processor
The step of method.
Compared with prior art, the present invention has advantages below：
Signal transacting scheme provided in an embodiment of the present invention, treats the detection of playing audio signal, judges whether to cut
Wave distortion, when it is determined that clipping distortion occur, determine the clipping distortion wave band of playing audio signal, and clipping distortion wave band pair
The time cycle answered；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from the ripple of clipping distortion
The original wave bands of Duan Caiyong are replaced, and generate the 3rd audio signal.By signal transacting scheme provided in an embodiment of the present invention, original is used
Beginning audio is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid
Noise problem caused by because of audio signal clipping distortion, therefore the usage experience of user can be lifted.
Brief description of the drawings
Fig. 1 is a kind of step flow chart of signal processing method of the embodiment of the present invention one；
Fig. 2 is the waveform signal of clipping distortion of the embodiment of the present invention；
Fig. 3 is a kind of step flow chart of signal processing method of the embodiment of the present invention two；
Fig. 4 is a kind of structured flowchart of mobile terminal of the embodiment of the present invention three；
Fig. 5 is a kind of structured flowchart of mobile terminal of the embodiment of the present invention four；
Fig. 6 is a kind of structured flowchart of mobile terminal of the embodiment of the present invention five；
Fig. 7 is a kind of structured flowchart of mobile terminal of the embodiment of the present invention six.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
Embodiment one
Reference picture 1, show a kind of step flow chart of signal processing method of the embodiment of the present invention one.
Signal processing method provided in an embodiment of the present invention comprises the following steps：
Step 101：Detect whether the first audio signal clipping distortion occurs.
Wherein, the first audio signal is audio signal to be played.Specifically, the detection for the first audio signal passes through shifting
FPGA (Field-Programmable Gate Array, field programmable gate array) processing unit, audio in dynamic terminal
Decoding chip and processor are detected.
At present, audio signal to be played is the signal that primary signal exported after algorithm process, and original waveform is not deposited
There is clipping distortion.After by the processing of some algorithms or effect, because the maximum amplitude of data signal is 0dB,
When the audio signal output after by processing, a part of wave band of audio signal will be reamed, signal as shown in Figure 2 occur
Waveform, because clipping distortion occurs in the signal for being given to power amplifier, therefore the sound that final electro-acoustic element plays just has noise.
In the embodiment of the present invention, effectively to solve the problems, such as audio signal clipping distortion to be played, when needing to carry out audio
During broadcasting, first the audio signal of audio to be played is detected, judges whether band playing audio signal clipping distortion occurs.
A kind of preferable detection method is：It is 0dB to detect the no digital audio and video signals amplitude for having a continuous sampling point；If have
Continuous 0dB signals occur, then show that clipping distortion occurs in audio signal to be played；It is on the contrary, it is determined that audio signal to be played
Do not occur clipping distortion.
Step 102：If there is clipping distortion, clipping distortion wave band in the first audio signal, and clipping distortion ripple are determined
Time cycle corresponding to section.
As shown in Fig. 2 when it is determined that clipping distortion occurs in audio signal to be played, the t periods pair as depicted are obtained
The wave band answered, and continuously there is the time intersection point t of 0dB amplitudes wave band and X-axis or so0And t1Between time cycle.
Step 103：Obtain original wave band corresponding with the time cycle in the second audio signal.
Wherein, the second audio signal is original audio signal.
As shown in Fig. 2 the time cycle is the time intersection point t for continuously occurring 0dB amplitudes wave band and X-axis or so0And t1Between
Time cycle, at the time of determining corresponding with this wave band in original audio signal in original audio signal according to the time cycle
t0- t and t1- t, wherein, delays of the t between original audio signal and audio signal to be played.
Step 104：Using the corresponding clipping distortion wave band replaced in the first audio signal of original wave band, the 3rd audio is generated
Signal.
As shown in Fig. 2 using t in original audio signal and the second audio signal0- t and t1The wave band of-t, it is corresponding
Replace t in the first audio signal0And t1The wave band at moment.
Signal processing method provided in an embodiment of the present invention, the detection of playing audio signal is treated, judge whether to cut
Wave distortion, when it is determined that clipping distortion occur, determine the clipping distortion wave band of playing audio signal, and clipping distortion wave band pair
The time cycle answered；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from the ripple of clipping distortion
The original wave bands of Duan Caiyong are replaced, and generate the 3rd audio signal.By signal processing method provided in an embodiment of the present invention, original is used
Beginning audio is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid
Noise problem caused by because of audio signal clipping distortion, therefore the usage experience of user can be lifted.
Embodiment two
Reference picture 3, a kind of step flow chart of signal processing method of the embodiment of the present invention two is shown.
Signal processing method provided in an embodiment of the present invention comprises the following steps：
Step 201：For each amplitude of the first audio signal, detect whether that continuous multiple amplitudes be present is default width
Value；If so, step 202 is then performed, if otherwise performing step 209.
Wherein, default amplitude could be arranged to 0dB.
Specifically, the detection for the first audio signal passes through the FPGA (Field-Programmable in mobile terminal
Gate Array, field programmable gate array) processing unit, audio decoder chip and processor detected.
Step 202：If, it is determined that has there is clipping distortion in the first audio signal.
Wherein, it is 0dB to preset amplitude.Each amplitude of audio signal to be played is detected, because audio signal to be played is
Just profound ripple, the corresponding amplitude of each time t, is detected whether to each amplitude to preset amplitude, if audio to be played is believed
Number do not occur clipping distortion, then within the audio signal time cycle to be played, it is default amplitude that there should be two amplitudes, works as presence
When continuous multiple amplitudes are default amplitude, it is determined that clipping distortion occurs in audio signal to be played.
Step 203：Determine clipping distortion wave band in the first audio signal, and week time corresponding to clipping distortion wave band
Phase.
As shown in Fig. 2 when it is determined that clipping distortion occurs in audio signal to be played, the t periods pair as depicted are obtained
The wave band answered, and continuously there is the time intersection point t of 0dB amplitudes wave band and X-axis or so0And t1Between time cycle.
Step 204：Obtain original wave band corresponding with the time cycle in the second audio signal.
Wherein, the second audio signal is original audio signal.
As shown in Fig. 2 the time cycle is the time intersection point t for continuously occurring 0dB amplitudes wave band and X-axis or so0And t1Between
Time cycle, at the time of determining corresponding with this wave band in original audio signal in original audio signal according to the time cycle
t0- t and t1- t, wherein delays of the ▽ t between original audio signal and audio signal to be played.
Step 205：Using the corresponding clipping distortion wave band replaced in the first audio signal of original wave band, the 3rd audio is generated
Signal.
The clipping distortion wave band of acquisition is replaced using original wave band so that the signal of clipping distortion be able to it is perfect,
And then avoid noise occur in the 3rd audio signal playing process, influence the experience of user.
Step 206：Determine the amplitude of each crest in the 3rd audio signal, and the amplitude of each trough.
Multiple crests, multiple troughs in 3rd audio signal be present；Each corresponding wave band of crest, each trough are corresponding
One wave band.The present invention subsequently carries out range-adjusting in implementing to wave band corresponding to each crest, trough.
Step 207：For each amplitude, the difference of amplitude and default amplitude is determined.
Such as：When default amplitude is 0dB, the amplitude of amplitude and each trough for each crest of acquisition, with
Default amplitude makes the difference, and obtains difference a.
Step 208：Each amplitude in wave band corresponding to amplitude is amplified according to difference.
By time cycle t0To t1Waveform overall magnitude increase a in period so that the amplitude of each crest and trough
To preset amplitude, the amplification to the 3rd audio signal is completed.
Preferably, the detection of clipping distortion is carried out again to the audio signal after amplification after execution of step 208, until
Ensure that clipping distortion situation is not present untill in this segment signal.
So far, signal processing flow terminates.
Step 209：If not, it is determined that the first audio signal does not occur clipping distortion.
If the first audio signal does not occur clipping distortion, play the first audio signal can be without carrying out audio signal again
Clipping distortion wave band is replaced.
Signal processing method provided in an embodiment of the present invention, the detection of playing audio signal is treated, judge whether to cut
Wave distortion, when it is determined that clipping distortion occur, determine the clipping distortion wave band of playing audio signal, and clipping distortion wave band pair
The time cycle answered；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from the ripple of clipping distortion
The original wave bands of Duan Caiyong are replaced, and generate the 3rd audio signal.By signal processing method provided in an embodiment of the present invention, original is used
Beginning audio is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid
Noise problem caused by because of audio signal clipping distortion, therefore the usage experience of user can be lifted.
Embodiment three
Reference picture 4, a kind of structured flowchart of mobile terminal of the embodiment of the present invention three is shown.
Mobile terminal provided in an embodiment of the present invention includes：Detection module 301, for detecting whether the first audio signal goes out
Existing clipping distortion, wherein first audio signal is audio signal to be played；First determining module 302, if for cutting
Wave distortion, determine clipping distortion wave band in first audio signal, and time cycle corresponding to the clipping distortion wave band；
Acquisition module 303, for obtaining original wave band corresponding with the time cycle in the second audio signal, wherein, described second
Audio signal is original audio signal；Replacement module 304, for correspondingly replacing the first audio letter using the original wave band
Clipping distortion wave band in number, generate the 3rd audio signal.
Mobile terminal provided in an embodiment of the present invention, the detection of playing audio signal is treated, judge whether slicing mistake occur
Very, when it is determined that clipping distortion occur, determine that the clipping distortion wave band of audio signal to be played, and clipping distortion wave band correspond to
Time cycle；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from the wave band of clipping distortion
Replaced using original wave band, generate the 3rd audio signal.By mobile terminal provided in an embodiment of the present invention, original audio is used
It is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid because of audio
Signal wave elimination distortion and caused noise problem, therefore the usage experience of user can be lifted.
Example IV
Reference picture 5, a kind of structured flowchart of mobile terminal of the embodiment of the present invention four is shown.
Mobile terminal provided in an embodiment of the present invention includes：Detection module 401, for detecting whether the first audio signal goes out
Existing clipping distortion, wherein first audio signal is audio signal to be played；First determining module 402, if for cutting
Wave distortion, determine clipping distortion wave band in first audio signal, and time cycle corresponding to the clipping distortion wave band；
Acquisition module 403, for obtaining original wave band corresponding with the time cycle in the second audio signal, wherein, described second
Audio signal is original audio signal；Replacement module 404, for correspondingly replacing the first audio letter using the original wave band
Clipping distortion wave band in number, generate the 3rd audio signal.
Preferably, the mobile terminal also includes：Second determining module 405, described in being used in the replacement module
After original wave band correspondingly replaces the clipping distortion wave band in first audio signal, the 3rd audio signal is generated, determines institute
State the amplitude of each crest in the 3rd audio signal, and the amplitude of each trough；Target audio signal generation module 406, for according to
According to the amplitude of each crest, the amplitude of each trough and default amplitude, the 3rd audio signal is amplified, generates target sound
Frequency signal.
Preferably, the target audio signal generation module 406 includes：Difference determination sub-module 4061, for for every
Individual amplitude, determine the difference of the amplitude and the default amplitude；Amplify submodule 4062, for according to the difference to described
Each amplitude in wave band corresponding to amplitude is amplified.
Preferably, the detection module 401 includes：Detection sub-module 4011, for for first audio signal
Each amplitude, detect whether that continuous multiple amplitudes be present is default amplitude；First determination sub-module 4012, for if so, then true
Has there is clipping distortion in fixed first audio signal；Second determination sub-module 4013, for if not, it is determined that first sound
Frequency signal does not occur clipping distortion.
Mobile terminal provided in an embodiment of the present invention, the detection of playing audio signal is treated, judge whether slicing mistake occur
Very, when it is determined that clipping distortion occur, determine that the clipping distortion wave band of audio signal to be played, and clipping distortion wave band correspond to
Time cycle；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from the wave band of clipping distortion
Replaced using original wave band, generate the 3rd audio signal.By mobile terminal provided in an embodiment of the present invention, original audio is used
It is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid because of audio
Signal wave elimination distortion and caused noise problem, therefore the usage experience of user can be lifted.
Embodiment five
Reference picture 6, show the structured flowchart of the mobile terminal of the embodiment of the present invention.
The mobile terminal 800 of the embodiment of the present invention includes：At least one processor 801, memory 802, at least one net
Network interface 804 and other users interface 803.Each component in mobile terminal 800 is coupled by bus system 805.
It is understood that bus system 805 is used to realize the connection communication between these components.Bus system 805 except include data/address bus it
Outside, in addition to power bus, controlling bus and status signal bus in addition.But for the sake of clear explanation, in figure 6 will be various total
Line is all designated as bus system 805.
Wherein, user interface 803 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 802 in the embodiment of the present invention can be volatile memory or nonvolatile memory,
Or it 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 (ErasablePROM, 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 high
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, DDRSDRAM), 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 embodiment of the present invention description system and method memory 802 be intended to including but not limited to these
With the memory of any other suitable type.
In some embodiments, memory 802 stores following element, can perform module or data structure, or
Their subset of person, or their superset：Operating system 8021 and application program 8022.
Wherein, operating system 8021, comprising various system programs, such as ccf layer, core library layer, driving layer etc., it is used for
Realize various basic businesses and the hardware based task of processing.Application program 8022, include 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 8022.
In embodiments of the present invention, by calling program or the instruction of the storage of memory 802, specifically, can be application
The program stored in program 8022 or instruction, processor 801 are used for：Detect whether the first audio signal clipping distortion occurs, its
Described in the first audio signal be audio signal to be played；If there is clipping distortion, slicing in first audio signal is determined
Distortion wave band, and time cycle corresponding to the clipping distortion wave band；Obtain in the second audio signal with the time cycle
Corresponding original wave band, wherein, second audio signal is original audio signal；Institute is correspondingly replaced using the original wave band
The clipping distortion wave band in the first audio signal is stated, generates the 3rd audio signal.
The method that the embodiments of the present invention disclose can apply in processor 801, or be realized by processor 801.
Processor 801 is probably a kind of IC chip, has the disposal ability of signal.In implementation process, the above method it is each
Step can be completed by the integrated logic circuit of the hardware in processor 801 or the instruction of software form.Above-mentioned processing
Device 801 can be general processor, digital signal processor (Digital Signal Processor, DSP), special integrated electricity
Road (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field
Programmable Gate Array, FPGA) either other PLDs, discrete gate or transistor logic,
Discrete hardware components.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.It is general
Processor can be microprocessor or the processor can also be any conventional processor etc..With reference to institute of the embodiment of the present invention
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 can be located at random access memory, 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 802, processor 801 read the information in memory 802, with reference to the step of its hardware completion above method.
It is understood that embodiments described herein can use 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 circuit (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 by performing the module (such as process, function etc.) of function described in the embodiment of the present invention
To realize the technology described in the embodiment of the present invention.Software code is storable in memory and passes through computing device.Storage
Device can be realized within a processor or outside processor.
Alternatively, processor 801 is additionally operable to：First audio signal is correspondingly replaced using the original wave band described
In clipping distortion wave band, generate three audio signals the step of after, methods described also includes：Determine the 3rd audio letter
The amplitude of each crest in number, and the amplitude of each trough；The amplitude and default amplitude of amplitude, each trough according to each crest,
3rd audio signal is amplified, generates target audio signal.
Alternatively, processor 801 is additionally operable to：The amplitude and default amplitude of amplitude, each trough according to each crest, to institute
The 3rd audio signal is stated to be amplified, generate target audio signal the step of, including：For each amplitude, the amplitude is determined
With the difference of the default amplitude；Each amplitude in wave band corresponding to the amplitude is amplified according to the difference.
Alternatively, processor 801 is additionally operable to：Whether the first audio signal of the detection there is the step of clipping distortion, wraps
Include：For each amplitude of first audio signal, detect whether that continuous multiple amplitudes be present is default amplitude；If so, then
Determine that clipping distortion has occurred in first audio signal；If not, it is determined that first audio signal does not occur clipping distortion.
Mobile terminal 800 can realize each process that mobile terminal is realized in previous embodiment, to avoid repeating, here
Repeat no more.
By mobile terminal provided in an embodiment of the present invention, the detection of playing audio signal is treated, judges whether to cut
Wave distortion, when it is determined that clipping distortion occur, determine the clipping distortion wave band of audio signal to be played, and clipping distortion wave band
The corresponding time cycle；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from clipping distortion
Wave band is replaced using original wave band, generates the 3rd audio signal.It is original by mobile terminal provided in an embodiment of the present invention, use
Audio is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid because
Audio signal clipping distortion and caused noise problem, therefore the usage experience of user can be lifted.
Embodiment six
Reference picture 7, show the structured flowchart of the mobile terminal of the embodiment of the present invention.
Mobile terminal in the embodiment of the present invention can be mobile phone, tablet personal computer, personal digital assistant (Personal
Digital Assistant, PDA) or vehicle-mounted computer etc..
Mobile terminal in Fig. 7 includes radio frequency (Radio Frequency, RF) circuit 910, memory 920, input block
930th, display unit 940, processor 960, voicefrequency circuit 970, WiFi (Wireless Fidelity) modules 980 and power supply
990。
Wherein, input block 930 can be used for the numeral or character information for receiving user's input, and generation and mobile terminal
User set and function control it is relevant signal input.Specifically, in the embodiment of the present invention, the input block 930 can be with
Including contact panel 931.Contact panel 931, also referred to as touch-screen, collect touch operation (ratio of the user on or near it
Such as user uses the operation of finger, any suitable object of stylus or annex on contact panel 931), and according to setting in advance
Fixed formula drives corresponding attachment means.Optionally, contact panel 931 may include touch detecting apparatus and touch controller two
Individual part.Wherein, the touch orientation of touch detecting apparatus detection user, and the signal that touch operation is brought is detected, signal is passed
Give touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, then
Give the processor 960, and the order sent of reception processing device 960 and can be performed.Furthermore, it is possible to using resistance-type, electricity
The polytypes such as appearance formula, infrared ray and surface acoustic wave realize contact panel 931.Except contact panel 931, input block 930
Can also include other input equipments 932, other input equipments 932 can include but is not limited to physical keyboard, function key (such as
Volume control button, switch key etc.), trace ball, mouse, the one or more in action bars etc..
Wherein, display unit 940 can be used for display by the information of user's input or be supplied to information and the movement of user
The various menu interfaces of terminal.Display unit 940 may include display panel 941, optionally, can use LCD or organic light emission
The forms such as diode (Organic Light-Emitting Diode, OLED) configure display panel 941.
It should be noted that contact panel 931 can cover display panel 941, touch display screen is formed, when the touch display screen is examined
After measuring the touch operation on or near it, processor 960 is sent to determine the type of touch event, is followed by subsequent processing device
960 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 arrangement mode of the conventional control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious
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 is used to show the higher control of utilization rate, for example,
Application icons such as settings button, interface numbering, scroll bar, phone directory icon etc..
Wherein processor 960 is the control centre of mobile terminal, utilizes each of various interfaces and connection whole mobile phone
Individual part, by running or performing the software program and/or module that are stored in first memory 921, and call and be stored in
Data in second memory 922, the various functions and processing data of mobile terminal are performed, it is overall so as to be carried out to mobile terminal
Monitoring.Optionally, processor 960 may include one or more processing units.
In embodiments of the present invention, by call store the first memory 921 in software program and/or module and/
Or the data in the second memory 922, processor 960 are used for：Detect whether the first audio signal clipping distortion occurs, wherein
First audio signal is audio signal to be played；If there is clipping distortion, determine that slicing loses in first audio signal
True wave band, and time cycle corresponding to the clipping distortion wave band；Obtain in the second audio signal with the time cycle pair
The original wave band answered, wherein, second audio signal is original audio signal；Described in being replaced using the original wave band is corresponding
Clipping distortion wave band in first audio signal, generate the 3rd audio signal.
Alternatively, processor 960 is additionally operable to：First audio signal is correspondingly replaced using the original wave band described
In clipping distortion wave band, generate three audio signals the step of after, methods described also includes：Determine the 3rd audio letter
The amplitude of each crest in number, and the amplitude of each trough；The amplitude and default amplitude of amplitude, each trough according to each crest,
3rd audio signal is amplified, generates target audio signal.
Alternatively, processor 960 is additionally operable to：The amplitude and default amplitude of amplitude, each trough according to each crest, to institute
The 3rd audio signal is stated to be amplified, generate target audio signal the step of, including：For each amplitude, the amplitude is determined
With the difference of the default amplitude；Each amplitude in wave band corresponding to the amplitude is amplified according to the difference.
Alternatively, processor 960 is additionally operable to：Whether the first audio signal of the detection there is the step of clipping distortion, wraps
Include：For each amplitude of first audio signal, detect whether that continuous multiple amplitudes be present is default amplitude；If so, then
Determine that clipping distortion has occurred in first audio signal；If not, it is determined that first audio signal does not occur clipping distortion.
By mobile terminal provided in an embodiment of the present invention, the detection of playing audio signal is treated, judges whether to cut
Wave distortion, when it is determined that clipping distortion occur, determine the clipping distortion wave band of audio signal to be played, and clipping distortion wave band
The corresponding time cycle；Original wave band corresponding with the time cycle in original audio signal is obtained, and will appear from clipping distortion
Wave band is replaced using original wave band, generates the 3rd audio signal.It is original by mobile terminal provided in an embodiment of the present invention, use
Audio is corresponding to replace the wave band that clipping distortion occurs, the problem of can effectively avoiding audio signal clipping distortion, so as to avoid because
Audio signal clipping distortion and caused noise problem, therefore the usage experience of user can be lifted.
A kind of mobile terminal, including：Memory, processor and it is stored on the memory and can be on the processor
The signal handler of operation, the signal handler are realized described signal processing method during the computing device
Step.
A kind of computer-readable recording medium, signal handler is stored with the computer-readable recording medium, institute
State the step of described signal processing method is realized when signal handler is executed by processor.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, it is related
Part illustrates referring to the part of embodiment of the method.
Provided herein signal processing method not with the intrinsic phase of any certain computer, virtual system or miscellaneous equipment
Close.Various general-purpose systems can also be used together with teaching based on this.As described above, construction has present invention side
Structure required by the system of case is obvious.In addition, the present invention is not also directed to any certain programmed language.Should be bright
In vain, various programming languages can be utilized to realize the content of invention described herein, and that is done above to language-specific retouches
State is to disclose the preferred forms of the present invention.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor
The application claims of shield features more more than the feature being expressly recited in each claim.More precisely, such as right
As claim reflects, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows tool
Thus claims of body embodiment are expressly incorporated in the embodiment, wherein the conduct of each claim in itself
The separate embodiments of the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and accompanying drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of different embodiments means in of the invention
Within the scope of and form different embodiments.For example, in detail in the claims, embodiment claimed it is one of any
Mode it can use in any combination.
The all parts embodiment of the present invention can be realized with hardware, or to be run on one or more processor
Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that it can use in practice
Microprocessor or digital signal processor (DSP) are realized in the processing method of signal transacting according to embodiments of the present invention
The some or all functions of some or all parts.The present invention is also implemented as being used to perform method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).Such reality
The program of the existing present invention can store on a computer-readable medium, or can have the form of one or more signal.
Such signal can be downloaded from internet website and obtained, and either be provided or in the form of any other on carrier signal
There is provided.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.For system embodiment
For, because it is substantially similar to embodiment of the method, so description is fairly simple, referring to the portion of embodiment of the method in place of correlation
Defend oneself bright.
Claims (10)
1. a kind of signal processing method, it is characterised in that methods described includes：
Detect whether the first audio signal clipping distortion occurs, wherein first audio signal is audio signal to be played；
If there is clipping distortion, clipping distortion wave band in first audio signal, and the clipping distortion wave band pair are determined
The time cycle answered；
Original wave band corresponding with the time cycle in the second audio signal is obtained, wherein, second audio signal is original
Beginning audio signal；
Clipping distortion wave band in first audio signal, generation the 3rd audio letter are correspondingly replaced using the original wave band
Number.
2. according to the method for claim 1, it is characterised in that correspondingly replace described the using the original wave band described
Clipping distortion wave band in one audio signal, generate three audio signals the step of after, methods described also includes：
Determine the amplitude of each crest in the 3rd audio signal, and the amplitude of each trough；
The amplitude and default amplitude of amplitude, each trough according to each crest, are amplified to the 3rd audio signal, generation
Target audio signal.
3. according to the method for claim 2, it is characterised in that the amplitude of amplitude, each trough according to each crest and pre-
If amplitude, the 3rd audio signal is amplified, generate target audio signal the step of, including：
For each amplitude, the difference of the amplitude and the default amplitude is determined；
Each amplitude in wave band corresponding to the amplitude is amplified according to the difference.
4. according to the method for claim 1, it is characterised in that whether the first audio signal of the detection clipping distortion occurs
The step of, including：
For each amplitude of first audio signal, detect whether that continuous multiple amplitudes be present is default amplitude；
If, it is determined that has there is clipping distortion in first audio signal；
If not, it is determined that first audio signal does not occur clipping distortion.
5. a kind of mobile terminal, it is characterised in that the mobile terminal includes：
Detection module, for detecting whether the first audio signal clipping distortion occurs, wherein first audio signal is to wait to broadcast
Put audio signal；
First determining module, if for there is clipping distortion, determine clipping distortion wave band in first audio signal, Yi Jisuo
State the time cycle corresponding to clipping distortion wave band；
Acquisition module, for obtaining original wave band corresponding with the time cycle in the second audio signal, wherein, described second
Audio signal is original audio signal；
Replacement module, it is raw for correspondingly replacing the clipping distortion wave band in first audio signal using the original wave band
Into the 3rd audio signal.
6. mobile terminal according to claim 5, it is characterised in that the mobile terminal also includes：
Second determining module, used in correspondingly replacing first audio signal using the original wave band in the replacement module
Clipping distortion wave band after, generate the 3rd audio signal, determine the amplitude of each crest in the 3rd audio signal, and respectively
The amplitude of trough；
Target audio signal generation module, for the amplitude according to each crest, the amplitude of each trough and default amplitude, to described
3rd audio signal is amplified, and generates target audio signal.
7. mobile terminal according to claim 6, it is characterised in that the target audio signal generation module includes：
Difference determination sub-module, for for each amplitude, determining the difference of the amplitude and the default amplitude；
Amplify submodule, for being amplified according to the difference to each amplitude in wave band corresponding to the amplitude.
8. mobile terminal according to claim 5, it is characterised in that the detection module includes：
Detection sub-module, for each amplitude for first audio signal, detect whether that continuous multiple amplitudes be present is
Default amplitude；
First determination sub-module, if for, it is determined that has there is clipping distortion in first audio signal；
Second determination sub-module, for if not, it is determined that first audio signal does not occur clipping distortion.
A kind of 9. mobile terminal, it is characterised in that including：Memory, processor and it is stored on the memory and can be in institute
The signal handler run on processor is stated, the signal handler is realized such as claim during the computing device
The step of signal processing method any one of 1 to 4.
10. a kind of computer-readable recording medium, it is characterised in that be stored with the computer-readable recording medium at signal
Program is managed, the signal transacting as any one of Claims 1-4 is realized when the signal handler is executed by processor
The step of method.
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| CN107690026B (en) | 2020-10-27 |
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