CN106935253A - The method of cutting out of audio file, device and terminal device - Google Patents
The method of cutting out of audio file, device and terminal device Download PDFInfo
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- CN106935253A CN106935253A CN201710142469.2A CN201710142469A CN106935253A CN 106935253 A CN106935253 A CN 106935253A CN 201710142469 A CN201710142469 A CN 201710142469A CN 106935253 A CN106935253 A CN 106935253A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
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Abstract
The invention discloses a kind of method of cutting out of audio file, device and terminal device, methods described includes：Determine the file fragment of the invalid audio and its place in audio file；File fragment where invalid audio in the audio file is cut, the audio file after generation cutting.In the present invention, the file fragment where the invalid audio in audio file can be automatically determined out, and cut, filtered equivalent to the invalid audio in audio file.So as in the case of effective audio in retaining audio file, reduce the size of the memory space shared by audio file, the utilization ratio level of the memory space of the equipment of lifting storage audio file.Also, when playing, the time for playing invalid audio in audio file is saved, save time and efforts of the user effort on invalid audio is listened to, the playing efficiency of audio file is improved, such that it is able to lift Consumer's Experience.
Description
Technical field
The present invention relates to field of terminal technology, more particularly, to a kind of method of cutting out of audio file, device and terminal
Equipment.
Background technology
With the progress and the development of society of science and technology, desktop computer, notebook computer, smart mobile phone and panel computer etc. are eventually
End equipment is widely available.
Substantial amounts of audio file is typically stored with the terminal device of user.Audio file includes music file and recording
File etc..User can be carried or external audio collecting device by terminal device, such as microphone, gather sound, generation
Recording file, for the voice-enabled chat in instant messaging, carries out that audio frequency and video are live or self manufacture audio/video program etc..
Due to for the user for being engaged in media industry, it is likely that need to store substantial amounts of audio file.
However, it was found by the inventors of the present invention that a considerable amount of audio files especially recording file, relatively more too fat to move, accounting for
With the substantial amounts of memory space of terminal device.
The content of the invention
In view of the above problems, the present invention proposes a kind of method of cutting out of audio file, device and terminal device, to pass through
Invalid audio in automatic cutting audio file, reduces the memory space that audio file takes, and lifts terminal device memory space
Utilization ratio level, lifted audio file playing efficiency.
In a first aspect, a kind of method of cutting out of audio file is provided in the embodiment of the present invention, including：
Determine the file fragment of the invalid audio and its place in audio file；
File fragment where invalid audio in audio file is cut, the audio file after generation cutting.
With reference in a first aspect, the embodiment of the present invention is in the first implementation of first aspect, when every in audio file
The audio at individual moment meet it is following at least one when, determine the moment audio be invalid audio：Characteristic value is less than default
Blank audio threshold, frequency match with default noised audio, sound source direction and assigned direction are inconsistent；And then determine nothing
File fragment where effect audio.
With reference to the first implementation of first aspect, in second implementation of first aspect, work as audio file
In the numerical value of audio that obtains of each instance sample when being less than default blank audio threshold, the audio for determining the moment is nothing
Effect audio；Wherein, the characteristic value of the audio at each moment is specially the numerical value of the audio that the instance sample is obtained in audio file.
With reference to second implementation of first aspect, in the third implementation of first aspect, work as audio file
During the recording file obtained for user side's recording, each moment by numerical value in the recording file less than the first blank audio threshold
Audio, is all defined as invalid audio；Or, when the music file that audio file is provided for service side, by the music file
Numerical value is all defined as invalid audio less than the audio at each moment of the second blank audio threshold；Wherein, the first blank audio threshold
Higher than the second blank audio threshold.
With reference to the first implementation of first aspect, in the 4th kind of implementation of first aspect, work as audio file
When the frequency of the audio at middle multiple moment keeps being basically unchanged, the audio for determining the plurality of moment is all invalid audio；Work as sound
When the Changing Pattern of frequency of the audio at multiple moment matches with the Changing Pattern of known noise in frequency file, determine that this is more
The audio at individual moment is all invalid audio.
With reference to the first implementation of first aspect, in the 5th kind of implementation of first aspect, work as audio file
When obtained by the sound of multiple audio collecting devices collection assigned direction, by sound inconsistent with assigned direction in the audio file
The corresponding audio in source, is defined as invalid audio.
With reference to any one implementation in the first to five kind of implementation of first aspect or first aspect, in first party
In the 6th kind of implementation in face, according to default linking duration, to each the file piece where invalid audio in audio file
The duration of section is cut；According to each file fragment of the audio file by cutting, the audio file after generation cutting.
With reference to the 6th kind of implementation of first aspect, in the 7th kind of implementation of first aspect, work as audio file
During for audio stream file in multimedia file, by each file fragment of the audio stream file by cutting, many matchmakers are matched
On the reproduction time axle of body file.
Second aspect, the embodiment of the invention provides a kind of Scissoring device of audio file, the cutting dress of the audio file
Put the function with the method for cutting out behavior for realizing above-mentioned first aspect middle pitch frequency file.Function can be realized by hardware,
Corresponding software can be performed by hardware to realize.Hardware or software include one or more moulds corresponding with above-mentioned functions
Block.
In a possible design, the structure of the Scissoring device of audio file includes：
Invalid audio determining module, the file fragment for determining invalid audio and its place in audio file；
Audio file cuts module, for being cut to the file fragment where invalid audio in audio file, generation
Audio file after cutting.
With reference to second aspect, in the first implementation of second aspect, invalid audio determining module is specifically for working as
In audio file the audio at each moment meet it is following at least one when, determine the moment audio be invalid audio：Feature
Value matches less than default blank audio threshold, frequency with default noised audio, sound source direction and assigned direction are inconsistent；
And then the file fragment where determining invalid audio.
With reference to the first implementation of second aspect, in second implementation of second aspect, invalid audio is true
The numerical value of audio of the cover half block specifically for being obtained when each instance sample in audio file is less than default blank audio threshold
When, the audio for determining the moment is invalid audio；Wherein, the characteristic value of the audio at each moment is specially this in audio file
The numerical value of the audio that instance sample is obtained.
With reference to second implementation of second aspect, in the third implementation of second aspect, invalid audio is true
Cover half block specifically for when audio file is the recording file that user side's recording is obtained, by numerical value in the recording file less than the
The audio at each moment of one blank audio threshold, is all defined as invalid audio；Or, when the sound that audio file is provided for service side
During music file, by numerical value in the music file less than the audio at each moment of the second blank audio threshold, all it is defined as invalid sound
Frequently；Wherein, the first blank audio threshold is higher than the second blank audio threshold.
With reference to the first implementation of second aspect, in the 4th kind of implementation of second aspect, invalid audio is true
Cover half block is specifically for when the frequency of the audio at multiple moment in audio file keeps being basically unchanged, determining the plurality of moment
Audio all be invalid audio；When the change of the Changing Pattern and known noise of the frequency of the audio at multiple moment in audio file
When rule matches, the audio for determining the plurality of moment is all invalid audio.
With reference to the first implementation of second aspect, in the 5th kind of implementation of second aspect, invalid audio is true
Cover half block is literary by the audio specifically for when audio file is that multiple audio collecting devices gather the sound gained of assigned directions
The corresponding audio of the source of sound inconsistent with assigned direction, is defined as invalid audio in part.
With reference to any one implementation in the first to five kind of implementation of second aspect or second aspect, in second party
In the 6th kind of implementation in face, audio file cuts module and is additionally operable to according to default linking duration, to nothing in audio file
The duration of each file fragment where effect audio is cut；It is raw according to each file fragment of the audio file by cutting
Into the audio file after cutting.
With reference to the 6th kind of implementation of second aspect, in the 7th kind of implementation of second aspect, audio file is cut out
Cut-off-die block is additionally operable to when audio file is the audio stream file in multimedia file, by by each of the audio stream file of cutting
File fragment, matches on the reproduction time axle of the multimedia file.
The third aspect, the embodiment of the invention provides a kind of terminal device, and the terminal device has realizes above-mentioned first party
The function of the method for cutting out behavior of face middle pitch frequency file.The function can be realized by hardware, it is also possible to be performed by hardware
Corresponding software is realized.The hardware or software include one or more modules corresponding with above-mentioned functions.
In a possible design, the structure of terminal device includes：Touch-sensitive display, one or more processors,
Memory and one or more application programs, wherein one or more application programs be stored in memory and be configured as by
One or more processors are performed, and one or more application programs are configured to：
Determine the file fragment of the invalid audio and its place in audio file；
File fragment where invalid audio in audio file is cut, the audio file after generation cutting.
Fourth aspect, the embodiment of the invention provides a kind of computer-readable storage medium, for saving as above-mentioned audio file
Scissoring device used by computer software instructions, its include for perform above-mentioned aspect be audio file Scissoring device set by
The program of meter.
Relative to prior art, the scheme that the present invention is provided, can automatically determine out invalid audio in audio file, with
And the file fragment where invalid audio；Then the file fragment where invalid audio in audio file is cut, quite
Invalid audio in audio file is filtered so that remain the overwhelming majority in the audio file after the cutting of generation
Effective audio.So as in the case of effective audio in retaining audio file, the storage reduced shared by audio file is empty
Between size, lifting storage audio file equipment memory space utilization ratio level.Also, playing audio file
During, save the time for playing invalid audio in audio file, save user effort on invalid audio is listened to when
Between and energy, improve the playing efficiency of audio file, be conducive to lifted user from play audio in obtain information efficiency,
Such that it is able to lift Consumer's Experience.
And, in embodiments of the invention, based on default blank audio threshold, noised audio, source of sound assigned direction,
Whether the audio for determining each moment in audio file is invalid audio.The precision and effect for determining invalid audio can be lifted
Rate；Be conducive in the case of effective audio in not influenceing audio file, the file fragment where cutting invalid audio reduces sound
Memory space shared by frequency file.
Further, in embodiments of the invention, during the file fragment where cutting invalid audio, retain default
Linking duration part.The rational linguistic context linking duration that sets can cause that front and rear sentence linking is smooth, help more to fill
Divide semantic ground expression, emotion and scene atmosphere etc.；Music linking duration between musical sound, Neng Gougeng are reasonably set
Plus fully state emotion, set off scene atmosphere by contrast and carry out interesting plot expression of such as chapter conversion etc., be conducive to audience
Sufficient music is brought to enjoy and imagination space.
The aspects of the invention or other aspects can more straightforwards in the following description.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, on the premise of not paying creative work, can also obtain other attached according to these accompanying drawings
Figure.
Fig. 1 shows the schematic flow sheet of the method for cutting out of the audio file of the embodiment of the present invention；
Fig. 2 shows the block schematic illustration of the internal structure of the Scissoring device of the audio file of the embodiment of the present invention；
Fig. 3 shows the block diagram of the internal structure of the terminal device of the embodiment of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention.
In some flows of description in description and claims of this specification and above-mentioned accompanying drawing, contain according to
Multiple operations of particular order appearance, but it should be clearly understood that these operations can not be according to the suitable of its appearance herein
Sequence is performed or executed in parallel, the sequence number such as 101,102 etc. of operation, is only used for distinguishing each different operation, sequence number
Any execution sequence is not represented for itself.In addition, these flows can include more or less operation, and these operations can
To perform in order or executed in parallel.It should be noted that " first ", " second " herein etc. describes, it is for distinguishing not
Same message, equipment, module etc., does not represent sequencing, and it is different types also not limit " first " and " second ".
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, the every other implementation that those skilled in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal device " both include wireless communication
The equipment of number receiver, the equipment of its wireless signal receiver for only possessing non-emissive ability, and including receiving and transmitting hardware
Equipment, its equipment with reception that two-way communication on bidirectional communication link, can be carried out and transmitting hardware.This equipment
Can include：Honeycomb or other communication equipments, it has single line display or multi-line display or is shown without multi-line
The honeycomb of device or other communication equipments；PCS (Personal Communications Service, PCS Personal Communications System), it can
With combine voice, data processing, fax and/or its communication ability；PDA (Personal Digital Assistant, it is personal
Digital assistants), it can include radio frequency receiver, pager, the Internet/intranet access, web browser, notepad, day
Go through and/or GPS (Global Positioning System, global positioning system) receiver；Conventional laptop and/or palm
Type computer or other equipment, its have and/or conventional laptop and/or palmtop computer including radio frequency receiver or its
His equipment." terminal " used herein above, " terminal device " they can be portable, can transport, installed in the vehicles (aviation,
Sea-freight and/or land) in, or be suitable for and/or be configured in local runtime, and/or with distribution form, operate in the earth
And/or any other position operation in space." terminal " used herein above, " terminal device " can also be communication terminal, on
Network termination, music/video playback terminal, for example, can be PDA, MID (Mobile Internet Device, mobile Internet
Equipment) and/or the equipment such as mobile phone, or intelligent television, Set Top Box with music/video playing function.
The present inventor has found by research, and for the recording file in audio file, a kind of existing scheme is to protect
All contents (including blank audio, noise etc.) for collecting in record length section are deposited, existing recording file is generated.Some
Scheme can provide manual clipping function in End of Tape rear line, and user needs voluntarily to find the blank audio in recording
With the invalid content such as noise, but cut manually again, kept；Cumbersome, workload is larger, causes the sanction of audio file
Inefficiency is cut, the reduction of Consumer's Experience is easily caused.
Based on above-mentioned discovery, the method for cutting out of audio file, the schematic flow sheet of the method are the embodiment of the invention provides
As shown in figure 1, including：S101 determines the file fragment of the invalid audio and its place in audio file；S102 is to audio text
File fragment in part where invalid audio is cut, the audio file after generation cutting.
Invalid audio include it is following at least one：Blank audio, noise, the audio from non-designated source of sound.Except nothing
Audio outside effect audio is effective audio.For example, effectively audio can include：Voice, musical instrument sound, the music of electronic synthesis,
The background sound of the Nature, background sound of social life etc..
In the embodiment of the present invention, the invalid audio in audio file and the file where invalid audio are automatically determined out
Fragment；Then the file fragment where invalid audio in audio file is cut, equivalent to invalid in audio file
Audio is filtered so that effective audio of the overwhelming majority is remained in the audio file after the cutting of generation.So as to protect
In the case of staying in audio file effectively audio, the size of the memory space shared by audio file, lifting storage sound are reduced
The utilization ratio level of the memory space of the equipment of frequency file.Also, during audio file is played, save broadcasting sound
The time of invalid audio in frequency file, time and efforts of the user effort on invalid audio is listened to is saved, improve audio
The playing efficiency of file, is conducive to lifting the efficiency that user obtains information from the audio played, such that it is able to lift user's body
Test.
The method of cutting out for introducing the audio file in the embodiment of the present invention developed below.
In above-mentioned steps S101, when the audio at each moment in audio file meet it is following at least one when, determine this
The audio at moment is invalid audio：Characteristic value matches less than default blank audio threshold, frequency with default noised audio,
Sound source direction is inconsistent with assigned direction；And then the file fragment where determining invalid audio.
It is preferred that when the characteristic value of the audio at each moment in audio file is less than default blank audio threshold, really
The audio for making the moment is invalid audio.
Specifically, the present inventor has found that the generating process of audio file is substantially as follows by research：Terminal device
By built-in or external audio collecting device, such as microphone, sound is gathered, obtain the initial audio telecommunications continuously simulated
Number；According to specified bit depth and sample frequency, the initial audio electric signal to continuous simulation carries out analog-to-digital conversion, obtain from
Scattered digital audio signal, generates audio file.
Conventional sample frequency include 8kHz (KHz), 11.025kHz, 22.05kHz, 16kHz, 37.8kHz,
44.1kHz or 48kHz etc..Therefore, the audio in the audio file of the embodiment of the present invention is on a timeline discrete.
In the embodiment of the present invention, the audio at each moment in digitized audio file, including the moment frequency spectrum, i.e., it is many
The corresponding electrical signal intensity value of the individual respective intensity of sound of frequency.
In the embodiment of the present invention, the respective intensity of sound of each frequency according to each moment corresponds to the total of electrical signal intensity value
With the numerical value of the audio that the instance sample is obtained is determined, as the characteristic value of the audio at the moment.When the audio at moment
Comprising frequency it is more when, the numerical value (characteristic value) of the audio is bigger.
The numerical value of the audio that each instance sample in audio file is obtained is compared with default blank audio threshold.
When the audio that each instance sample in audio file is obtained numerical value be less than default blank audio threshold when, it is believed that this when
Carve and do not exist audio (or the audio at the moment is blank audio), the audio for determining the moment is invalid audio.Wherein, ability
Field technique personnel can predefine out blank sound according to experimental data, historical data, empirical data, and/or actual conditions
Frequency threshold value.
Further, the numerical value of the audio for being obtained when each instance sample in audio file is less than default blank audio threshold
When, the audio for determining the moment is the blank audio in invalid audio.
When the numerical value of the audio that each instance sample in audio file is obtained is not less than default blank audio threshold, can
To think that the moment has audio, the audio for determining the moment is effective audio.
More excellent, the present inventor is it is considered that audio file can segment out the file of multiple species.For example, record
Sound file and music file.Recording file refers to user side's recording file for obtaining of recording, including terminal device user voluntarily
The recording file and other users of recording are recorded and transmitted to file etc. of making video recording of the subscriber terminal equipment.Music file
Refer to service side's making, distribution and/or the music file for providing.
It is preferred that blank audio threshold is segmented out into the first blank audio threshold and the second blank audio threshold, and cause
First blank audio threshold is higher than the second blank audio threshold.
When audio file is the recording file that user side's recording is obtained, by the number of the audio at each moment in the recording file
Value, respectively with the comparing of the first blank audio threshold；By numerical value in the recording file less than the first blank audio threshold it is each when
The audio at quarter, is all defined as the blank audio in invalid audio.
It is appreciated that not having the audio collecting device of specialty generally due to domestic consumer, not possessing the later stage sound of specialty
Frequency disposal ability, therefore recording file is higher in the noise level of some frequency ranges.Using numerical value the first blank audio threshold higher
Value, is conducive to the noise removed in recording file during follow-up cutting, reduces memory space shared by recording file, and can be with
Effective audio of recording file is concentrated, the playback efficiency of recording file is lifted.
Or, when the music file that audio file is provided for service side, by the audio at each moment in the recording file
Numerical value, respectively with the comparing of the second blank audio threshold；Numerical value in the music file is each less than the second blank audio threshold
The audio at moment, is all defined as the blank audio in invalid audio.
It is appreciated that removing audio processing equipment after generally there is the audio collecting device of specialty, specialty due to service side
And noise level in technical force, therefore music file is very low, it is likely that also including number voice intensity it is smaller (sound compared with
For trickle) audio.Therefore, using the second blank audio threshold that numerical value is relatively low, can protected during follow-up cutting
The noise in audio file is preferably removed in the case of staying more trickle sound effect.
Further, the recognition methods of the recording file that user side's recording is obtained is additionally provided in the embodiment of the present invention.For example,
When the instruction for being related to record or operation that user is input into recording software is detected, by the audio of recording software correspondence output
File is defined as recording file.For another example, cloud server collects the recording file conduct that substantial amounts of user side's recording is obtained in advance
Sample recording file, determines the sound characteristic that these samples are made video recording in file, trains the sound characteristic model of recording file；
Similarity between the sound characteristic model of audio file and recording file to be identified is based on by terminal device, is identified and is waited to know
Whether other audio file is recording file.
It is preferred that when the frequency of the audio at each moment matches with default noised audio in audio file, it is determined that
The audio for going out the moment is invalid audio.
Specifically, the present inventor carries out research discovery, and the noise in invalid audio can be subdivided into many types,
Can be including the noise of the noise of fixed frequency and CF etc..The noise of fixed frequency refers to be kept within a period of time
One frequency；The buzz for for example during operation of air conditioner sending.The noise of CF refers to that frequency is regular within a period of time
Change；Such as specific background sound of the vehicles such as automobile, train or aircraft.
Therefore, the frequency to the audio at multiple moment in audio file is detected.
When the frequency of the audio at multiple moment in audio file keeps being basically unchanged, the audio at the plurality of moment is determined
All it is invalid audio.Further, when the frequency of the audio at multiple moment in detecting audio file keeps being basically unchanged, it is determined that
The audio for going out the plurality of moment is all the noise in invalid audio.
When the Changing Pattern of frequency of the audio at multiple moment in audio file matches with the Changing Pattern of known noise
When, the audio for determining the plurality of moment is all invalid audio.Further, in audio file is detected multiple moment audio
The Changing Pattern of frequency and the Changing Pattern of known noise when matching, the audio for determining the plurality of moment is all invalid sound
Noise in frequency.
More excellent, present inventors noted that may be using multiple audio collecting devices (for example under many occasions
Microphone) collection assigned direction sound；But in gatherer process, inevitably gather the sound in other directions.Cause
This, the audio in the audio file being subsequently generated, both (sound is corresponding) audio including assigned direction, also including other directions
Audio.And the audio in other directions is actually unwanted.
For example, in meeting, it is necessary to retain be directed towards the audio that spokesman direction at dais (i.e. assigned direction) is gathered,
But inevitably collect towards under platform the cough of the participant in direction (i.e. out other directions of assigned direction),
The unwanted audio of the sound that whisper sound, limbs are contacted with object etc., belongs to invalid audio.Audio collecting device is sensitiveer,
The composition of the invalid audio in other directions included in audio file is more.
Therefore, when obtained by the sound that audio file is multiple audio collecting devices collection assigned directions when, to audio
Direction detected；By the corresponding audio of inconsistent with assigned direction in audio file source of sound, it is defined as invalid audio.
Further, by the corresponding audio of inconsistent with assigned direction in audio file source of sound, it is defined as the noise in invalid audio.
It is preferred that the mode of assigned direction dependent instruction that assigned direction can be based on user input is obtained.Can also be by
Cloud server collects the audio file of substantial amounts of known assigned direction as sample audio file in advance, determines these samples
The direction character of the audio in audio file, trains the audio direction character model of audio file；It is based on treating by terminal device
Similarity between the audio file of identification and the audio direction character model of audio file, identifies audio file to be identified
In assigned direction.
Based on the above-mentioned invalid audio determined from audio file, the file fragment where determining invalid audio.Compared with
Goodly, the initial time of the file fragment where determining invalid audio and finish time.
In above-mentioned steps S102, the file fragment where invalid audio in audio file is cut, after generation cuts
Audio file preserved.
Specifically, the file fragment where invalid audio is cropped from audio file, remaining file fragment is spelled
The audio file after cutting is connected in be preserved.
It is appreciated that remaining file fragment contains effective audio of former audio file, the process of splicing is cut, actually
It is the process for filtering the invalid audio in former audio file.Realize reducing in the case where effective audio of former audio file is retained
Memory space shared by audio file；And play cut after audio file during, broadcasting is all effective audio, is improved
Play the efficiency of audio file.
More excellent, the present inventor has found by research, as the use of audience when playing audio file to be lifted
The experience at family, actually needs to set some suitable linguistic context linking durations between audio.
In the embodiment of the present invention, according to default linking duration, to each file where invalid audio in audio file
The duration of fragment is cut；According to each file fragment of the audio file by cutting, the audio file after generation cutting.
Those skilled in the art can be according to experimental data, historical data, empirical data, application scenarios and/or actual feelings
Condition, predefines out linking duration.Linking duration can include that linguistic context is connected duration and music linking duration.It is preferred that linguistic context
Linking duration could be arranged to a certain duration in the range of 1-10S (second).
The duration of each file fragment where invalid audio in audio file is compared with the default duration that is connected；
When the duration of this document fragment exceedes linking duration, the part in this document fragment beyond linking duration is cropped；To pass through
Each file fragment for cutting and each file fragment without cutting, are spliced into the audio file after cutting and are preserved.Enter
One step, the finish time trigger countershaft of the file fragment from where invalid audio forward, is cropped more than linking duration
Part.
It is preferred that for the voice talked with, according to the pause of normal dialog linguistic context, setting linguistic context convergence time.Will
The duration of each file fragment in audio file where invalid audio is compared with linguistic context convergence time；When this document fragment
Duration when exceeding linguistic context convergence time, retain the part of linguistic context convergence time since the initial time of this document fragment,
To be cropped beyond the time period corresponding part of linguistic context convergence time；By each file fragment by cutting, cutting is spliced into
Audio file afterwards is preserved.
For example, the file fragment where blank audio is determined from recording file, moment of this document fragment is from 00:05
To 01:10；When linguistic context convergence time is 2S (second), 00 is cropped:07 to 01:The blank audio-frequency unit of 10 periods, retains 00:
05 to 00:The blank audio-frequency unit of 06 period；The blank audio-frequency unit of reservation is spliced with original other file fragments,
For example, by 00:05 to 00:The blank audio-frequency unit of 06 period, directly with 01:11 enter for the audio file fragment of initial time
Row splicing.The unit interval of this example sound intermediate frequency is 1S (second), and actually this example is applied to any unit interval, for example, be applied to
0.1S, 0.01S, millisecond, microsecond or nanosecond etc., those skilled in the art can determine the unit interval according to actual conditions.
It is appreciated that for voice, generally require to produce the pause of certain time length according to linguistic context between voice sentence,
I.e. linguistic context is connected duration (such as 2S), and linguistic context linking duration is dead time when people speak according to normal word speed, rationally
The front and rear sentence linking that can cause to pause of setting linguistic context linking duration it is smooth, help more fully to express semantic, emotion
Color and scene atmosphere etc..
It is preferred that for music, by the duration and sound of each file fragment where invalid audio in audio file
Happy linking duration is compared；When the duration of this document fragment exceedes music is connected duration, retain from this document fragment
The music that moment beginning starts is connected the part of duration, will be cropped beyond the time period corresponding part of music linking duration；Will
By each file fragment for cutting and without each file fragment for cutting, it is spliced into the audio file after cutting and is protected
Deposit.Further, it is possible to the species and/or the scene of performance of the type, musical instrument according to music, when further subdivision music is connected
It is long.
It is appreciated that for music, needing to set stopping for some suitable durations between musical sound in many cases
Pause (i.e. music linking duration).Therefore, the music linking duration between musical sound is reasonably set, can be more fully stated
Emotion, the interesting plot expression for setting off scene atmosphere by contrast and carrying out the conversion of such as chapter etc., are conducive to bringing sufficient sound to audience
It is happy to enjoy and imagination space.
More excellent, the audio file of the embodiment of the present invention also includes audio stream file.
Specifically, generally included in multimedia file：Video stream file and audio stream file；Subtitle file may also be included
Etc..When multimedia file is played, audio stream file generally with other files such as video stream file according to same broadcasting when
Countershaft is played out.
Therefore, when audio file is the audio stream file in multimedia file, it is possible to use the above method determines sound
The file fragment where invalid audio and invalid audio in frequency stream file；To where invalid audio in audio stream file
File fragment is cut, and obtains each file fragment by the audio stream file for cutting；By the audio stream text by cutting
Each file fragment of part, matches on the reproduction time axle of the multimedia file；By by each text in the audio stream file of cutting
The broadcasting moment correspondence that part fragment and each file fragment match is preserved.So, the broadcasting of neither influence multimedia file is imitated
Really, the size of audio stream file is reduced again, saves the memory space shared by audio stream file.
Based on the method for cutting out of above-mentioned audio file, the Scissoring device of audio file is additionally provided in the embodiment of the present invention,
The block schematic illustration of the internal structure of the device as shown in Fig. 2 including：Invalid audio determining module 201 and audio file cut
Module 202.
Wherein, invalid audio determining module 201 is used to determine the file of invalid audio and its place in audio file
Fragment.
Audio file cuts module 202 to be used to cut the file fragment where invalid audio in audio file, raw
Into the audio file after cutting.
It is preferred that invalid audio determining module 201 when the audio at each moment in audio file specifically for meeting following
At least one when, determine the moment audio be invalid audio：Characteristic value less than default blank audio threshold, frequency with it is pre-
If noised audio match, sound source direction and assigned direction it is inconsistent；And then the file fragment where determining invalid audio.
It is preferred that invalid audio determining module 201 is specifically for the audio that is obtained when each instance sample in audio file
Numerical value be less than default blank audio threshold when, determine the moment audio be invalid audio；Wherein, it is every in audio file
The characteristic value of the audio at individual moment is specially the numerical value of the audio that the instance sample is obtained.
It is preferred that invalid audio determining module 201 is specifically for being the recording text that user side's recording is obtained when audio file
During part, by numerical value in the recording file less than the audio at each moment of the first blank audio threshold, all it is defined as invalid audio；Or
Person, when the music file that audio file is provided for service side, the second blank audio threshold is less than by numerical value in the music file
Each moment audio, be all defined as invalid audio；Wherein, the first blank audio threshold is higher than the second blank audio threshold.
It is preferred that invalid audio determining module 201 when the frequency of the audio at multiple moment in audio file specifically for protecting
Hold when being basically unchanged, the audio for determining the plurality of moment is all invalid audio；When the audio at multiple moment in audio file
When the Changing Pattern of frequency matches with the Changing Pattern of known noise, the audio for determining the plurality of moment is all invalid sound
Frequently.
It is preferred that invalid audio determining module 201 is specifically for being that multiple audio collecting device collections refer to when audio file
When determining the sound gained in direction, by the corresponding audio of inconsistent with assigned direction in audio file source of sound, it is invalid to be defined as
Audio.
It is preferred that audio file cuts module 202 be additionally operable to according to default linking duration, to invalid sound in audio file
The duration of each file fragment where frequency is cut；According to each file fragment of the audio file by cutting, generation is cut out
Audio file after cutting.
It is preferred that audio file cuts the audio stream file that module 202 is additionally operable in audio file is multimedia file
When, each file fragment of the audio stream file by cutting is matched on the reproduction time axle of the multimedia file.
Above-mentioned invalid audio determining module 201 and audio file cut the implementation method of the function of module 202, may be referred to
The particular content in the method for cutting out of audio file is stated, here is omitted.
The embodiment of the present invention additionally provides terminal device, as shown in figure 3, for convenience of description, illustrate only and the present invention
The related part of embodiment, particular technique details is not disclosed, and refer to present invention method part.The terminal can be
Including mobile phone, panel computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point of
Sales, point-of-sale terminal), any terminal device such as vehicle-mounted computer, so that terminal is as mobile phone as an example：
Fig. 3 is illustrated that the block diagram of the part-structure of the mobile phone related to terminal provided in an embodiment of the present invention.With reference to figure
3, mobile phone includes：Radio frequency (Radio Frequency, RF) circuit 310, memory 320, input block 330, display unit 340,
Sensor 350, voicefrequency circuit 360, Wireless Fidelity (wireless fidelity, WiFi) module 370, processor 380 and
The grade part of power supply 390.It will be understood by those skilled in the art that the handset structure shown in Fig. 3 does not constitute the restriction to mobile phone,
Part more more or less than diagram can be included, or combine some parts, or different part arrangements.
Each component parts of mobile phone is specifically introduced with reference to Fig. 3：
RF circuits 310 can be used to receiving and sending messages or communication process in, the reception and transmission of signal, especially, by base station
After downlink information is received, processed to processor 380；In addition, up data is activation will be designed to base station.Generally, RF circuits 310
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise
Amplifier, LNA), duplexer etc..Additionally, RF circuits 310 can also be communicated by radio communication with network and other equipment.
Above-mentioned radio communication can use any communication standard or agreement, including but not limited to global system for mobile communications (Global
System of Mobile communication, GSM), general packet radio service (General Packet Radio
Service, GPRS), CDMA (Code Division Multiple Access, CDMA), WCDMA
(Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution,
LTE), Email, Short Message Service (Short Messaging Service, SMS) etc..
Memory 320 can be used to store software program and module, and processor 380 is by running storage in memory 320
Software program and module, so as to perform various function application and the data processing of mobile phone.Memory 320 can mainly include
Storing program area and storage data field, wherein, the application journey that storing program area can be needed for storage program area, at least one function
Sequence (such as sound-playing function, image player function etc.) etc.；Storage data field can be stored and use what is created according to mobile phone
Data (such as voice data, phone directory etc.) etc..Additionally, memory 320 can include high-speed random access memory, can be with
Including nonvolatile memory, for example, at least one disk memory, flush memory device or other volatile solid-states
Part.
Input block 330 can be used to receive the numeral or character information of input, and produce with the user of mobile phone set with
And the relevant key signals input of function control.Specifically, input block 330 may include that contact panel 331 and other inputs set
Standby 332.Contact panel 331, also referred to as touch-screen, user can be collected thereon or neighbouring touch operation (such as user uses
The operation of any suitable object such as finger, stylus or annex on contact panel 331 or near contact panel 331), and root
Corresponding attachment means are driven according to formula set in advance.Optionally, contact panel 331 may include touch detecting apparatus and touch
Two parts of controller.Wherein, touch detecting apparatus detect the touch orientation of user, and detect the signal that touch operation brings,
Transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into touching
Point coordinates, then give processor 380, and the order sent of receiving processor 380 and can be performed.Furthermore, it is possible to using electricity
The polytypes such as resistive, condenser type, infrared ray and surface acoustic wave realize contact panel 331.Except contact panel 331, input
Unit 330 can also include other input equipments 332.Specifically, other input equipments 332 can include but is not limited to secondary or physical bond
One or more in disk, function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc..
Display unit 340 can be used for show by user input information or be supplied to user information and mobile phone it is various
Menu.Display unit 340 may include display panel 341, optionally, can use liquid crystal display (Liquid Crystal
Display, LCD), the form such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) it is aobvious to configure
Show panel 341.Further, contact panel 331 can cover display panel 341, when contact panel 331 detect it is thereon or attached
After near touch operation, processor 380 is sent to determine the type of touch event, with preprocessor 380 according to touch event
Type corresponding visual output is provided on display panel 341.Although in figure 3, contact panel 331 and display panel 341
It is input and the input function that mobile phone is realized as two independent parts, but in some embodiments it is possible to by touch-control
Panel 331 and display panel 341 be integrated and input that realize mobile phone and output function.
Mobile phone may also include at least one sensor 350, such as optical sensor, motion sensor and other sensors.
Specifically, optical sensor may include ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to ambient light
Light and shade adjust the brightness of display panel 341, proximity transducer can close display panel 341 when mobile phone is moved in one's ear
And/or backlight.As one kind of motion sensor, (generally three axles) acceleration in the detectable all directions of accelerometer sensor
Size, size and the direction of gravity are can detect that when static, can be used for recognize mobile phone attitude application (such as horizontal/vertical screen is cut
Change, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap) etc.；May be used also as mobile phone
The other sensors such as gyroscope, barometer, hygrometer, thermometer, the infrared ray sensor of configuration, will not be repeated here.
Voicefrequency circuit 360, loudspeaker 361, microphone 362 can provide the COBBAIF between user and mobile phone.Audio-frequency electric
Electric signal after the voice data conversion that road 360 will can receive, is transferred to loudspeaker 361, and sound is converted to by loudspeaker 361
Signal output；On the other hand, the voice signal of collection is converted to electric signal by microphone 362, is turned after being received by voicefrequency circuit 360
It is changed to voice data, then after voice data output processor 380 is processed, through RF circuits 310 to be sent to such as another mobile phone,
Or export to memory 320 so as to further treatment voice data.
WiFi belongs to short range wireless transmission technology, and mobile phone can help user's transceiver electronicses postal by WiFi module 370
Part, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and has accessed.Although Fig. 3 shows
WiFi module 370, but it is understood that, it is simultaneously not belonging to must be configured into for mobile phone, can not change as needed completely
Become in the essential scope of invention and omit.
Processor 380 is the control centre of mobile phone, using various interfaces and the various pieces of connection whole mobile phone, is led to
Cross operation or perform software program of the storage in memory 320 and/or module, and call storage in memory 320
Data, perform the various functions and processing data of mobile phone, so as to carry out integral monitoring to mobile phone.Optionally, processor 380 can be wrapped
Include one or more processing units；Preferably, processor 380 can integrated application processor and modem processor, wherein, should
Operating system, user interface and application program etc. are mainly processed with processor, modem processor mainly processes radio communication.
It is understood that above-mentioned modem processor can not also be integrated into processor 380.
Mobile phone also includes the power supply 390 (such as battery) powered to all parts, it is preferred that power supply can be by power supply pipe
Reason system is logically contiguous with processor 380, so as to realize management charging, electric discharge and power managed by power-supply management system
Etc. function.
Although not shown, mobile phone can also will not be repeated here including camera, bluetooth module etc..
Although additionally, not shown, the terminal device in the embodiment of the present invention with mobile phone as representative, also including it is built-in at least
One audio collecting device or at least one external audio collecting device.
In embodiments of the present invention, the processor 380 included by the terminal also has following functions：
One or more programs are run for determining the file fragment of invalid audio and its place in audio file；It is right
File fragment in audio file where invalid audio is cut, the audio file after generation cutting.
It is preferred that run one or more programs meets following at least one for the audio at each moment in the audio file
Xiang Shi, the audio for determining the moment is invalid audio：Characteristic value is made an uproar less than default blank audio threshold, frequency with default
Sound audio matches, sound source direction and assigned direction are inconsistent；And then the file fragment where determining invalid audio.
It is preferred that running one or more programs for the numerical value of audio that obtains of each instance sample in the audio file
During less than default blank audio threshold, the audio for determining the moment is invalid audio；Wherein, each moment in audio file
The characteristic value of audio be specially the numerical value of the audio that the instance sample is obtained.
It is preferred that run one or more programs be used for when audio file is the recording file that user side's recording is obtained,
By numerical value in the recording file less than the audio at each moment of the first blank audio threshold, all it is defined as invalid audio；Or, when
During the music file that audio file is provided for service side, by numerical value in the music file less than the second blank audio threshold it is each when
The audio at quarter, is all defined as invalid audio；Wherein, the first blank audio threshold is higher than the second blank audio threshold.
It is preferred that run one or more programs being kept substantially for the frequency of audio at multiple moment in the audio file
When constant, the audio for determining the plurality of moment is all invalid audio；When the frequency of the audio at multiple moment in audio file
When Changing Pattern matches with the Changing Pattern of known noise, the audio for determining the plurality of moment is all invalid audio.
It is preferred that running one or more programs for when audio file is multiple audio collecting device collection assigned directions
Sound gained when, by the corresponding audio of inconsistent with assigned direction in audio file source of sound, be defined as invalid audio.
It is preferred that one or more programs are run for according to default linking duration, to invalid audio in audio file
The duration of each file fragment at place is cut；According to each file fragment of the audio file by cutting, generation cuts
Audio file afterwards.
It is preferred that when running one or more programs for being the audio stream file in multimedia file when audio file,
Each file fragment of the audio stream file by cutting is matched on the reproduction time axle of the multimedia file.
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 several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example multiple units or component
Can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to 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.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with instructing the hardware of correlation by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：Read-only storage (ROM, Read Only Memory), random access memory (RAM, Random
Access Memory), disk or CD etc..
One of ordinary skill in the art will appreciate that all or part of step in realizing above-described embodiment method can be
The hardware of correlation is instructed to complete by program, described program can be stored in a kind of computer-readable recording medium, on
It can be read-only storage, disk or CD etc. to state the storage medium mentioned.
A kind of terminal device provided by the present invention is described in detail above, for the general technology people of this area
Member, according to the thought of the embodiment of the present invention, will change in specific embodiments and applications, in sum,
This specification content should not be construed as limiting the invention.
Claims (10)
1. a kind of method of cutting out of audio file, it is characterised in that including：
Determine the file fragment of the invalid audio and its place in audio file；
File fragment where invalid audio in the audio file is cut, the audio file after generation cutting.
2. method according to claim 1, it is characterised in that the invalid audio determined in audio file and its institute
File fragment, including：
When the audio at each moment in the audio file meet it is following at least one when, determine the audio at the moment for invalid
Audio：Characteristic value matches less than default blank audio threshold, frequency with default noised audio, sound source direction and designated parties
To inconsistent；
And then the file fragment where determining invalid audio.
3. method according to claim 2, it is characterised in that when the feature of the audio at each moment in the audio file
When value is less than default blank audio threshold, the audio at the moment is determined for invalid audio, including：
When the numerical value of the audio that each instance sample in the audio file is obtained is less than default blank audio threshold, it is determined that
The audio for going out the moment is invalid audio；
Wherein, the characteristic value of the audio at each moment is specially the number of the audio that the instance sample is obtained in the audio file
Value.
4. method according to claim 3, it is characterised in that when the sound that each instance sample in the audio file is obtained
When the numerical value of frequency is less than default blank audio threshold, the audio at the moment is determined for invalid audio, including：
When the audio file is the recording file that user side's recording is obtained, numerical value in the recording file is less than the first blank
The audio at each moment of audio threshold, is all defined as invalid audio；Or
When the music file that the audio file is provided for service side, numerical value in the music file is less than the second blank audio
The audio at each moment of threshold value, is all defined as invalid audio；
Wherein, the first blank audio threshold is higher than the second blank audio threshold.
5. method according to claim 2, it is characterised in that when the frequency of the audio at each moment in the audio file
When matching with default noised audio, the audio at the moment is determined for invalid audio, including：
When the frequency of the audio at multiple moment in the audio file keeps being basically unchanged, the audio at the plurality of moment is determined
All it is invalid audio；
When the Changing Pattern of frequency of the audio at multiple moment in the audio file matches with the Changing Pattern of known noise
When, the audio for determining the plurality of moment is all invalid audio.
6. method according to claim 2, it is characterised in that when the source of sound of the audio at each moment in the audio file
When direction is inconsistent with assigned direction, the audio at the moment is determined for invalid audio, including：
When the sound gained that the audio file is multiple audio collecting devices collection assigned directions, by the audio file with
The corresponding audio of the inconsistent source of sound of the assigned direction, is defined as invalid audio.
7. the method according to claim any one of 1-6, it is characterised in that to where invalid audio in the audio file
File fragment cut, generation cut after audio file, also include：
According to default linking duration, the duration to each file fragment where invalid audio in the audio file is cut out
Cut；
According to each file fragment of the audio file by cutting, the audio file after generation cutting.
8. method according to claim 7, it is characterised in that according to from the audio file by each text for cutting
Part fragment, the audio file after generation cutting, also includes：
When the audio file is the audio stream file in multimedia file, by by each of the audio stream file of cutting
File fragment, matches on the reproduction time axle of the multimedia file.
9. a kind of Scissoring device of audio file, it is characterised in that including：
Invalid audio determining module, the file fragment for determining invalid audio and its place in audio file；
Audio file cuts module, for being cut to the file fragment where invalid audio in the audio file, generation
Audio file after cutting.
10. a kind of terminal device, including：
Touch-sensitive display；
One or more processors；
Memory；
One or more application programs, wherein one or more of application programs are stored in the memory and are configured
It is that, by one or more of computing devices, one or more of programs are configured to：
Determine the file fragment of the invalid audio and its place in audio file；
File fragment where invalid audio in the audio file is cut, the audio file after generation cutting.
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