CN109817237A - A kind of audio automatic processing method, terminal and computer readable storage medium - Google Patents
A kind of audio automatic processing method, terminal and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a kind of audio automatic processing method, terminal and computer readable storage mediums, are related to audio editing techniques field.Audio automatic processing method provided by the invention can ambient noise in automatic identification initial audio, instantaneous noise, blank noise and handled, the process of tonal sound is repaired without manually participating in audition, so that the threshold of audio processing reduces, the audio of high-quality also can get with conventional equipment recording.
Description
Technical field
The present invention relates to video editing techniques field more particularly to a kind of audio automatic processing methods, terminal and computer
Readable storage medium storing program for executing.
Background technique
Video dubbing device on the market is divided to two classes at present, and one kind is mobile phone or this intelligent movable equipment of plate, advantage
It is that the sharing with audio-video is more convenient, disadvantage is then that equipment is not professional enough, and the audio-video for often recording out is not clear enough, product
Matter is not high；It is another kind of, it is the recording studio equipment of profession, advantage is that audio-video quality, clarity that record comes out etc. is higher, but
It is this kind of equipment in professional degree, operational, economy etc. is all unable to satisfy the demand of ordinary consumer.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of sound with audio-video or amateur recording studio equipment to be mobile
Frequency automatic processing method, the audio-video made have quality is high, meets ordinary consumer to be happy to share outstanding audio-video demand
The characteristics of.
To solve the above-mentioned problems, the present invention proposes following technical scheme:
In a first aspect, the embodiment of the present invention proposes a kind of audio automatic processing method, comprising the following steps:
S101 obtains initial audio；
S102 identifies the ambient noise in the initial audio, inhibits the ambient noise according to the first parameter, obtains the
One audio；
S103 judges that first audio whether there is instantaneous noise, if it exists the instantaneous noise, then will be described instantaneous
The frequency of noise is reduced in the first predeterminated frequency, obtains the second audio；
S104 judges in the second audio that the blank is made an uproar if it exists with the presence or absence of blank noise between adjacent two section audio
Sound then inhibits the blank noise according to the second parameter, obtains third audio；
S105 carries out duplicate removal to third audio and fault is gone to manage, and obtains the 4th audio；
S106 judges whether the size of the 4th audio exceeds preset range, if the size of the 4th audio is not pre-
If in range, then being compressed according to default compression factor to the 4th audio；
S107 carries out volume maximization processing to compressed 4th audio settings volume range, generates PCM file；
Wherein, first parameter is the parameter obtained according to ambient noise, the second parameter is to be obtained according to blank noise
Parameter.
Further technical solution is for it, further comprising the steps of:
S108 obtains background paper, is decoded, is cut to the background paper according to the duration of the PCM file；
S109 carries out adaptive acoustic feedback counteracting to the background paper and the PCM file；
S110 agrees with the adjustment of musical instrument, the rhythm, clarity and word speed to PCM file progress sound area, most；
The background paper and the PCM file synthesis are generated mp3 file by S111；
Wherein, the background paper is audio file.
Second aspect, the embodiment of the present invention propose a kind of terminal, comprising: for executing method as described in relation to the first aspect
Unit.
The third aspect, the embodiment of the present invention propose another terminal, including processor, input equipment, output equipment and deposit
Reservoir, the processor, input equipment, output equipment and memory are connected with each other, wherein the memory is for storing application
Program code, the processor are configured for calling said program code, execute method as described in relation to the first aspect.
Fourth aspect, the embodiment of the present invention propose a kind of computer readable storage medium, and the computer storage medium is deposited
Computer program is contained, the computer program includes program instruction, and described program instruction makes described when being executed by a processor
Processor executes method as described in relation to the first aspect.
Compared with prior art, the present invention attainable technical effect include: can ring in automatic identification initial audio
Border noise, instantaneous noise, blank noise are simultaneously handled, and the process of tonal sound are repaired without manually participating in audition, so that at audio
The threshold of reason reduces, and also can get the audio of high-quality with conventional equipment recording.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of audio automatic processing method flow chart that the embodiment of the present invention proposes；
Fig. 2 is a kind of audio automatic processing method flow chart that another embodiment of the present invention proposes.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states, similar reference numerals represent similar component in attached drawing.Obviously, will be described below embodiment is only the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that in this embodiment of the present invention term used in the description merely for the sake of description particular implementation
Example purpose and be not intended to limit the embodiment of the present invention.Such as the institute in specification and appended book of the embodiment of the present invention
As use, other situations unless the context is clearly specified, otherwise " one " of singular, "one" and "the" are intended to wrap
Include plural form.
Referring to Fig. 1, the present embodiment proposes a kind of audio automatic processing method, comprising the following steps:
S101 obtains initial audio；
In specific implementation, initial audio by arbitrarily can sound pick-up outfit record, such as pick up facility.
S102 identifies the ambient noise in the initial audio, inhibits the ambient noise according to the first parameter, obtains the
One audio；
In specific implementation, the audio volume control that acquisition initial audio most starts is as ambient noise sample, by adaptively filtering
Wave device carries out the automatic adjustment of sef-adapting filter parameter, to adapt to the system of unknown or random variation in signal and ambient noise
Characteristic is counted, to realize optimal filter, the first parameter is obtained, and then inhibit the ambient noise, obtains the first audio.
It should be noted that the first parameter preset is technical staff's self-setting, which is not limited by the present invention.
S103 judges that first audio whether there is instantaneous noise, if it exists the instantaneous noise, then will be described instantaneous
The frequency of noise is reduced in the first predeterminated frequency, obtains the second audio；
In specific implementation, the audio duration of transient noise is very short but intensity is very big, by the first audio of detection
Exceed the first predeterminated frequency with the presence or absence of interior audio in short-term.If it exists in short-term in audio exceed the first predeterminated frequency audio, then
It can determine whether the frequency of this instantaneous noise to be reduced in the first predeterminated frequency, can be obtained without instantaneous noise for instantaneous noise
The second audio.
It should be noted that the first predeterminated frequency is technical staff according to self-settinies such as sound pick-up outfit, environmental qualities
Frequency values, in the first audio in short-term in frequency be more than that the value is judged as instantaneous noise, refer to that the time is less than 1s in short-term.
S104 judges in the second audio that the blank is made an uproar if it exists with the presence or absence of blank noise between adjacent two section audio
Sound then inhibits the blank noise according to the second parameter, obtains third audio；
In specific implementation, the faint noise between the audio of two Duan Gansheng regards as blank noise, and blank is made an uproar if it exists
Sound then inhibits the blank noise according to the second parameter, obtains third audio.Wherein, the second parameter is sef-adapting filter root
The parameter automatically adjusted according to the frequency of blank noise.
S105 carries out duplicate removal to third audio and fault is gone to manage, and obtains the 4th audio；
In one embodiment, duplicate removal goes fault reason to specifically include step S1051-1053:
The amplitude of third audio is compared S1051 with frequency-domain model, if comparing successfully, carries out deduplication operation, together
When the stem of third audio is carried out fading in processing, tail portion carries out processing of fading out；
The amplitude of third audio is compared S1052 with frequency-domain model, if comparing failure, carries out sound to third audio
Measure normalized and time domain quantification treatment；
S1053 carries out the third audio after Audio Normalization processing and time domain quantification treatment with frequency-domain model again
It compares, successfully executes time domain recovery, deduplication operation if comparing, the stem of third audio is carried out to fade in processing, tail portion progress
It fades out processing.
In other embodiments, can also carry out duplicate removal by other prior arts goes fault to manage, and the present invention is no longer superfluous to this
It states.
S106 judges whether the size of the 4th audio exceeds preset range, if the size of the 4th audio is not pre-
If in range, then being compressed according to default compression factor to the 4th audio；
In specific implementation, due to signal transmission requirement, audio file cannot be excessive, if the size of the 4th audio is not
When within a preset range, then the 4th audio is compressed according to default compression factor.
It should be noted that default compression factor has technical staff according to actual file size come sets itself.
S107 carries out volume maximization processing to compressed 4th audio settings volume range, generates PCM file.
In specific implementation, in order to enrich audio volume when playing and undistorted, need to volume to audio according to standard
Volume carry out maximization processing, in addition, for avoid audio export different bit rates distortion, also need to carry out at shake it
Reason, audio maximize processing and dithering process and can be carried out by the prior art, and the present invention repeats no more this.
In one embodiment, a kind of audio automatic processing method provided by the invention, further comprising the steps of:
S108 obtains background paper, is decoded, is cut to the background paper according to the duration of the PCM file；
In specific implementation, the background paper is audio file, according to the duration of the PCM file to the background paper
It is decoded, cuts, so that PCM file is consistent with the duration of background paper.
S109 carries out adaptive acoustic feedback counteracting to the background paper and the PCM file；
In specific implementation, by decoded background paper voice modulation to sample rate identical with PCM file, sampling braille
Joint number, channel number offset model using interference according to environmental quality, carry out interference of the automotive resistance echo to audio.
In some embodiments, such as the present embodiment, the voice signal that local microphone is exported incite somebody to action this as original signal
The voice signal of ground loudspeaker input carries out Echo Cancellation as reference signal, according to local environmental quality, to inhibit local
The output of microphone feeds back (echo) through the electroacoustic of indoor acoustic feedback to microphone, to realize that adaptive acoustic feedback (echo) is supported
Disappear.
It should be noted that the environment meeting such as the influence of the environmental quality such as interior space, outdoor large space, small-sized confined space
So that sound wave is propagating the different-effect by different degrees of reflection to show.
S110 agrees with the adjustment of musical instrument, the rhythm, clarity and word speed to PCM file progress sound area, most；
In specific implementation, using dry one key audio signal processing technique of sound, the analysis of sound area is carried out to PCM file, most agrees with musical instrument
Analysis, prosodic analysis, clarity analysis and word speed analysis, understand the sound area of PCM file, most agree with musical instrument, the rhythm, clarity
With word speed to be adjusted as needed.
The tune that the prior art can be used to carry out sound area, most agree with musical instrument, the rhythm, clarity and word speed in other embodiments
Whole, the present invention repeats no more this.
The background paper and the PCM file synthesis are generated mp3 file by S111.
In specific implementation, two audio files (background paper and the PCM file) is subjected to volume adjustment, is closed
At compressed encoding generates mp3 file.The mode of audio synthesis is highly developed, and this will not be repeated here by the present invention.
In other embodiments, it before judging step S102 of first audio with the presence or absence of instantaneous noise, also wraps
Include step S112:
S112 judges the fundamental frequency of first audio whether in the first predeterminated frequency section, if the base of first audio
Frequency is then eliminated by male's labial in the first predeterminated frequency section；If the fundamental frequency of first audio is not default first
In frequency separation, then eliminated by women labial.
In specific implementation, labiodental usually occurs between 2K to 5K, when carrying out audio processing to this specific frequency
It carries out doing the effect compressed and just have labiodental, the sound audible frequency of male and female is different, therefore the fundamental frequency of labiodental
Also it has any different, the first predeterminated frequency section is male's lips and teeth voice frequency in the present embodiment, can be by technical staff's sets itself, this
Invention does not limit this.
In one embodiment, further include step S113-S114 before the step S107:
S113 judges compressed 4th sound according to the attack value of compressed 4th audio, release value
Whether frequency needs make-up；Specifically include step S1131-S1132:
S1131 judges whether attack value is greater than the second preset threshold, and whether release value is greater than third predetermined threshold value,
If the attack value is greater than the second preset threshold, release value is greater than third predetermined threshold value, then to the described compressed 4th
Audio carries out make-up；
In specific implementation, it is distorted in order to avoid causing sound to be mutated after compressing audio files, therefore according to compressed
Attack value, release value are judged that attack value is greater than the second preset threshold, and release value is greater than third and presets threshold
Value illustrates that compression threshold setting is too low, causes overall loudness to become smaller, in order to compensate for the signal strength of loss, need to carry out make-
Up compensation.
It should be noted that the second preset threshold, third predetermined threshold value can be set by technical staff according to time situation
Fixed, the present invention does not repeat them here this.
If the S1132 attack value is less than third predetermined threshold value less than the second preset threshold or release value, execute
Step S114.
Attack value is less than third predetermined threshold value less than the second preset threshold or release value, illustrates that compression factor is suitable,
Volume is not caused to damage, without carrying out make-up.
S114 judges whether compressed 4th audio needs to adjust according to the frequency values of compressed 4th audio
Frequency.Specifically include step S1141-S1142:
S1141 judge the frequency values whether in predeterminated frequency range, if the frequency values not in predeterminated frequency range,
It adjusts within the scope of the frequency values to predeterminated frequency, spatial impression is eliminated in the depth position of adjustment L channel, right channel；
S1142 judges the frequency values whether in predeterminated frequency range, if the frequency values are held in predeterminated frequency range
Row step S107.
Another embodiment of the present invention provides a kind of terminals, including the unit for executing the above method:
Acquiring unit, for obtaining initial audio；
Unit is eliminated in labiodental, for judge the fundamental frequency of first audio whether in the first predeterminated frequency section, if
The fundamental frequency of first audio is then eliminated by male's labial in the first predeterminated frequency section；If first audio
Fundamental frequency in the first predeterminated frequency section, is not then eliminated by women labial.
First de-noising unit, the ambient noise in the initial audio, inhibits the ring according to the first parameter for identification
Border noise obtains the first audio.
Second de-noising unit, for judge first audio with the presence or absence of instantaneous noise, the instantaneous noise if it exists,
Then the frequency of the instantaneous noise is reduced in the first predeterminated frequency, obtains the second audio.
Third de-noising unit whether there is blank noise for judging, if depositing between adjacent two section audio in the second audio
In the blank noise, then the blank noise is inhibited according to the second parameter, obtain third audio.
Duplicate removal removes wrong processing unit, goes fault to manage for carrying out duplicate removal to third audio, obtains the 4th audio.
Compression unit, for judging whether the size of the 4th audio exceeds preset range, if the 4th audio
Size within a preset range, is not then compressed the 4th audio according to default compression factor.
Make-up unit, for judging the pressure according to the attack value of compressed 4th audio, release value
Whether the 4th audio after contracting needs make-up；It specifically includes: judging whether attack value is greater than the second preset threshold, release
Whether value is greater than third predetermined threshold value, if the attack value is greater than the second preset threshold, release value is greater than third and presets threshold
Value then carries out make-up to compressed 4th audio；If the attack value less than the second preset threshold or
Release value is less than third predetermined threshold value, then executes and described judged according to the size of the frequency values of compressed 4th audio
Whether compressed 4th audio needs the step of adjustment frequency.
The first adjustment unit, for judging compressed 4th sound according to the frequency values of compressed 4th audio
Whether frequency needs adjustment frequency；The frequency values are judged whether in predeterminated frequency range, if the frequency values are not in predeterminated frequency model
It encloses, then adjusts within the scope of the frequency values to predeterminated frequency；The depth position of L channel, right channel is adjusted, spatial impression is eliminated；Judgement
Whether the frequency values are in predeterminated frequency range, if the frequency values execute described to compressed in predeterminated frequency range
4th audio settings volume range step.
First generation unit, it is raw for carrying out volume maximization processing to compressed 4th audio settings volume range
At PCM file；Wherein, first parameter is the parameter obtained according to ambient noise, the second parameter is to be obtained according to blank noise
The parameter obtained.
Unit is cut out, for obtaining background paper, the background paper is solved according to the duration of the PCM file
Code is cut.
Offset unit, for carrying out adaptive acoustic feedback counteracting to the background paper and the PCM file；
Second adjustment unit, for carrying out sound area to the PCM file, most agreeing with musical instrument, the rhythm, clarity and word speed
Adjustment.
Second generation unit, for generating mp3 file for the background paper and the PCM file synthesis；Wherein, institute
Stating background paper is audio file.
Another embodiment of the present invention proposes a kind of terminal, including processor, input equipment, output equipment and memory, institute
It states processor, input equipment, output equipment and memory to be connected with each other, wherein the memory is for storing application program generation
Code, the processor are configured for calling said program code, execute the method as described in step S101-S114.
The embodiment of the present invention proposes a kind of computer readable storage medium, and the computer storage medium is stored with computer
Program, the computer program include program instruction, and described program instruction when being executed by a processor executes the processor
Method as described in step S101-S114.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment
Part, reference can be made to the related descriptions of other embodiments.
The above is a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any ripe
It knows those skilled in the art in the technical scope disclosed by the present invention, various equivalent modifications can be readily occurred in or replaces
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of audio automatic processing method, which comprises the following steps:
S101 obtains initial audio；
S102 identifies the ambient noise in the initial audio, inhibits the ambient noise according to the first parameter, obtains the first sound
Frequently；
S103 judges that first audio whether there is instantaneous noise, if it exists the instantaneous noise, then by the instantaneous noise
Frequency be reduced in the first predeterminated frequency, obtain the second audio；
S104 judges in the second audio between adjacent two section audio with the presence or absence of blank noise, if it exists the blank noise, then
Inhibit the blank noise according to the second parameter, obtains third audio；
S105 carries out duplicate removal to third audio and fault is gone to manage, and obtains the 4th audio；
S106 judges whether the size of the 4th audio exceeds preset range, if the size of the 4th audio is not in default model
In enclosing, then the 4th audio is compressed according to default compression factor；
S107 carries out volume maximization processing to compressed 4th audio settings volume range, generates PCM file；
Wherein, first parameter is the parameter obtained according to ambient noise, the second parameter is the ginseng obtained according to blank noise
Number.
2. audio automatic processing method as described in claim 1, which is characterized in that further comprising the steps of:
S108 obtains background paper, is decoded, is cut to the background paper according to the duration of the PCM file；
S109 carries out adaptive acoustic feedback counteracting to the background paper and the PCM file；
S110 agrees with the adjustment of musical instrument, the rhythm, clarity and word speed to PCM file progress sound area, most；
The background paper and the PCM file synthesis are generated mp3 file by S111；
Wherein, the background paper is audio file.
3. audio automatic processing method as described in claim 1, which is characterized in that further include step before the step S102
S112:
S112 judges the fundamental frequency of first audio whether in the first predeterminated frequency section, if the fundamental frequency of first audio exists
In first predeterminated frequency section, then eliminated by male's labial；If the fundamental frequency of first audio is not in the first predeterminated frequency
In section, then eliminated by women labial.
4. audio automatic processing method as described in claim 1, which is characterized in that before the step S107, further include with
Lower step S113-S114:
S113 judges that compressed 4th audio is according to the attack value of compressed 4th audio, release value
It is no to need make-up；
S114 judges whether compressed 4th audio needs adjustment frequency according to the frequency values of compressed 4th audio.
5. audio automatic processing method as claimed in claim 4, which is characterized in that the step S113 is specifically included:
Judge whether attack value is greater than the second preset threshold, whether release value is greater than third predetermined threshold value, if described
Attack value be greater than the second preset threshold, release value be greater than third predetermined threshold value, then to compressed 4th audio into
Row make-up；If the attack value is less than third predetermined threshold value less than the second preset threshold or release value, step is executed
Rapid S114.
6. audio automatic processing method as claimed in claim 4, which is characterized in that the step S115 is specifically included:
Judge the frequency values whether in predeterminated frequency range, if the frequency values not in predeterminated frequency range, described in adjustment
Within the scope of frequency values to predeterminated frequency；The depth position of L channel, right channel is adjusted, spatial impression is eliminated.
7. audio automatic processing method as claimed in claim 6, which is characterized in that the step S115 specifically further includes sentencing
Whether the frequency values that break are in predeterminated frequency range, if the frequency values then follow the steps S107 in predeterminated frequency range.
8. a kind of terminal characterized by comprising for executing the unit of the method according to claim 1 to 7.
9. a kind of terminal, which is characterized in that the processor, defeated including processor, input equipment, output equipment and memory
Enter equipment, output equipment and memory to be connected with each other, wherein the memory is for storing application code, the processing
Device is configured for calling said program code, executes the method according to claim 1 to 7.
10. a kind of computer readable storage medium, which is characterized in that the computer storage medium is stored with computer program,
The computer program includes program instruction, and described program instruction makes the processor execute such as right when being executed by a processor
It is required that the described in any item methods of 1-7.
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Application publication date: 20190528 |