CN109584901A - Emergent broadcast audio-frequency processing method and device - Google Patents
Emergent broadcast audio-frequency processing method and device Download PDFInfo
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- CN109584901A CN109584901A CN201910090162.1A CN201910090162A CN109584901A CN 109584901 A CN109584901 A CN 109584901A CN 201910090162 A CN201910090162 A CN 201910090162A CN 109584901 A CN109584901 A CN 109584901A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
- G10L21/0324—Details of processing therefor
- G10L21/034—Automatic adjustment
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
- H03M1/1028—Calibration at two points of the transfer characteristic, i.e. by adjusting two reference values, e.g. offset and gain error
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/1245—Details of sampling arrangements or methods
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Abstract
The present embodiments relate to signal processing technology fields, specifically, it is related to a kind of emergent broadcast audio-frequency processing method and device, this method can make analog-digital converter convert audio signals into multiple digital signals, and then obtain the amplitude of each digital signal, and the gain of analog-digital converter is adjusted according to setting gain delta based on setting amplitude section and setting duration, and then realization is to the Indirect method of the amplitude of each digital signal, so, it can adaptively be adjusted for the audio signal of different amplitudes, to effectively, the audio signal of different amplitudes is played in high quality.
Description
Technical field
The present embodiments relate to signal processing technology fields, in particular to a kind of emergent broadcast audio processing side
Method and device.
Background technique
Emergent broadcast refers to public when the burst such as major natural disasters, emergency event, public health and social safety occurs
It can provide a kind of faster information transfer channel when crisis.Emergent broadcast can be in first time disaster message or disaster
The harm that may cause is transmitted in common people's hand, and the people is allowed to know what has occurred at the first time, it should how
It withdraws, hedging, life and property loss is preferably minimized.
Emergent broadcast can receive a variety of audio inputs, such as the input of route audio input, microphone audio and wired electricity
Audio input etc. is talked about, but most of emergency broadcase systems are difficult to effectively, in high quality play these audio inputs.
Summary of the invention
In view of this, the present invention provides a kind of emergent broadcast audio-frequency processing method and devices.
The embodiment of the invention provides a kind of emergent broadcast audio-frequency processing methods, are applied to server-side, and the server-side is logical
Letter is connected to analog-digital converter, which comprises
Control the analog-digital converter real-time reception audio signal；
Make the analog-digital converter that the audio signal are converted to multiple digital signals according to setting sample rate；
Obtain the amplitude of each digital signal；
For each amplitude got, judge whether the amplitude is located at outside setting amplitude section, if the amplitude is located at institute
It states outside setting amplitude section, whether is respectively positioned at the time of judgement to obtain the amplitude as each amplitude in the setting duration of starting point
Outside the setting amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to
Setting gain delta is adjusted the gain of the analog-digital converter, is located at until at least having one in the setting duration
Target amplitude in the setting amplitude section；Wherein, the target amplitude is the analog-digital converter conversion after gain adjustment
The corresponding amplitude of obtained digital signal.
Optionally, institute whether is respectively positioned on as each amplitude in the setting duration of starting point at the time of judgement to obtain the amplitude
It states outside setting amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to setting
Determine gain delta to be adjusted the gain of the analog-digital converter, until at least having one in the setting duration is located at institute
The step of stating the target amplitude in setting amplitude section, comprising:
Whether first is below as each amplitude in the first setting duration of starting point at the time of judgement to obtain the amplitude
Setting value；
If each amplitude in the first setting duration is below first setting value, according to the first setting gain
Increment adds up to the gain of the analog-digital converter, is not less than until at least having one in the first setting duration
The first object amplitude of first setting value；Wherein, the first object amplitude is the analog-digital converter after gain is cumulative
The corresponding amplitude of the digital signal being converted to, first setting value are the lower limit value in the setting amplitude section.
Optionally, institute whether is respectively positioned on as each amplitude in the setting duration of starting point at the time of judgement to obtain the amplitude
It states outside setting amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to setting
Determine gain delta to be adjusted the gain of the analog-digital converter, until at least having one in the setting duration is located at institute
The step of stating the target amplitude in setting amplitude section, comprising:
Whether reach second as each amplitude in the second setting duration of starting point at the time of judgement to obtain the amplitude
Setting value；
If each amplitude in the second setting duration reaches second setting value, according to the second setting gain
Increment carries out regressive to the gain of the analog-digital converter, does not reach until at least having one in the second setting duration
To the second target amplitude of second setting value；Wherein, second target amplitude is the analog-to-digital conversion after gain regressive
The corresponding amplitude of the digital signal that device is converted to, second setting value are the upper limit value in the setting amplitude section.
Optionally, the method also includes:
The modification instruction for modifying the first setting gain delta is obtained, parsing, which obtains in the modification instruction, includes
First object gain delta；
Obtain the siding-to-siding block length value in the setting amplitude section；
Judge whether the first object gain delta reaches the siding-to-siding block length value, if the first object gain delta
Reach the siding-to-siding block length value, refusal executes the modification instruction, if the first object gain delta does not reach the area
Between length value, according to the modification instruction by it is described first setting gain delta be revised as the first object gain delta.
Optionally, the step of obtaining the siding-to-siding block length value in the setting amplitude section, comprising:
It obtains the amplitude at one of endpoint in the setting amplitude section and as the first setting value, is set described in acquisition
Amplitude at another endpoint in tentering value section and as the second setting value；
Calculate the absolute value of the difference of first setting value and second setting value；
The absolute value as the siding-to-siding block length value and is obtained.
The embodiment of the invention also provides a kind of emergent broadcast apparatus for processing audio, are applied to server-side, the server-side
It is communicatively coupled to analog-digital converter, described device includes:
Audio signal reception module, for controlling the analog-digital converter real-time reception audio signal；
Digital signal obtains module, for converting the analog-digital converter by the audio signal according to setting sample rate
For multiple digital signals；
Amplitude obtains module, for obtaining the amplitude of each digital signal；
Gain regulation module, for judging whether the amplitude is located at setting amplitude section for each amplitude got
Outside, if the amplitude is located at outside the setting amplitude section, as in the setting duration of starting point at the time of judgement to obtain the amplitude
Whether each amplitude is respectively positioned on outside the setting amplitude section, if each amplitude in the setting duration is respectively positioned on described set
Outside tentering value section, the gain of the analog-digital converter is adjusted according to setting gain delta, until the setting duration
Inside at least there is the target amplitude being located in the setting amplitude section；Wherein, the target amplitude be gain adjustment it
The corresponding amplitude of the digital signal that analog-digital converter afterwards is converted to.
Optionally, as the setting of starting point at the time of the gain regulation module is judged by the following manner to obtain the amplitude
Whether each amplitude in duration is respectively positioned on outside the setting amplitude section, if the equal position of each amplitude in the setting duration
In outside the setting amplitude section, the gain of the analog-digital converter is adjusted according to setting gain delta, until described
It sets and at least there is the target amplitude being located in the setting amplitude section in duration:
Whether first is below as each amplitude in the first setting duration of starting point at the time of judgement to obtain the amplitude
Setting value；
If each amplitude in the first setting duration is below first setting value, according to the first setting gain
Increment adds up to the gain of the analog-digital converter, is not less than until at least having one in the first setting duration
The first object amplitude of first setting value；Wherein, the first object amplitude is the analog-digital converter after gain is cumulative
The corresponding amplitude of the digital signal being converted to, first setting value are the lower limit value in the setting amplitude section.
Optionally, as the setting of starting point at the time of the gain regulation module is judged by the following manner to obtain the amplitude
Whether each amplitude in duration is respectively positioned on outside the setting amplitude section, if the equal position of each amplitude in the setting duration
In outside the setting amplitude section, the gain of the analog-digital converter is adjusted according to setting gain delta, until described
It sets and at least there is the target amplitude being located in the setting amplitude section in duration:
Whether reach second as each amplitude in the second setting duration of starting point at the time of judgement to obtain the amplitude
Setting value；
If each amplitude in the second setting duration reaches second setting value, according to the second setting gain
Increment carries out regressive to the gain of the analog-digital converter, does not reach until at least having one in the second setting duration
To the second target amplitude of second setting value；Wherein, second target amplitude is the analog-to-digital conversion after gain regressive
The corresponding amplitude of the digital signal that device is converted to, second setting value are the upper limit value in the setting amplitude section.
Optionally, described device further include:
Modified module parses described in obtaining for obtaining the modification instruction for modifying the first setting gain delta
The first object gain delta for including in modification instruction；Obtain the siding-to-siding block length value in the setting amplitude section；Judge described
Whether one target gain increment reaches the siding-to-siding block length value, if the first object gain delta reaches the siding-to-siding block length
Value, refusal executes the modification instruction, if the first object gain delta does not reach the siding-to-siding block length value, according to described
The first setting gain delta is revised as the first object gain delta by modification instruction.
Optionally, the modified module obtains the siding-to-siding block length value in the setting amplitude section in the following manner:
It obtains the amplitude at one of endpoint in the setting amplitude section and as the first setting value, is set described in acquisition
Amplitude at another endpoint in tentering value section and as the second setting value；
Calculate the absolute value of the difference of first setting value and second setting value；
The absolute value as the siding-to-siding block length value and is obtained.
The embodiment of the invention also provides a kind of server-side, including memory, processor and storage are on a memory simultaneously
The computer program that can be run on a processor, the processor realize above-mentioned emergent broadcast when executing the computer program
Audio-frequency processing method.
The embodiment of the invention also provides a kind of computer readable storage medium, the readable storage medium storing program for executing includes computer
Program, the server-side computer program controls the readable storage medium storing program for executing when running where execute above-mentioned emergent broadcast audio
Processing method.
Beneficial effect
Emergent broadcast audio-frequency processing method and device provided in an embodiment of the present invention, can make analog-digital converter believe audio
Multiple digital signals number are converted to, and then obtain the amplitude of each digital signal, and based on setting amplitude section and setting duration
The gain of analog-digital converter is adjusted according to setting gain delta, and then is realized to the indirect of the amplitude of each digital signal
Adjustment so, it is possible adaptively to be adjusted for the audio signal of different amplitudes, and the signal-to-noise ratio that analog-digital converter provides is remote
Higher than the signal-to-noise ratio that pure digi-tal automatic gain controller provides, under the premise of the broadcast sound volume of guarantee audio signal is as big as possible
It can be avoided distortion, the audio signal of different amplitudes can be played effectively, in high quality.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of block diagram of server-side provided by the embodiment of the present invention.
Fig. 2 is a kind of flow chart of emergent broadcast audio-frequency processing method provided by the embodiment of the present invention.
Fig. 3 is a kind of structural block diagram of emergency broadcase system provided by the embodiment of the present invention.
Fig. 4 is a kind of another flow chart of emergent broadcast audio-frequency processing method provided by the embodiment of the present invention.
Fig. 5 be the embodiment of the present invention provided by one kind stress broadcast audio processing method another flow chart.
Fig. 6 is a kind of module frame chart of emergent broadcast apparatus for processing audio provided by the embodiment of the present invention.
Icon:
10- server-side；11- memory；12- processor；13- network module；
20- emergent broadcast apparatus for processing audio；21- audio signal reception module；22- digital signal obtains module；23- width
Value obtains module；24- gain regulation module.
30- client；
40- analog-digital converter；
50- output end.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment only
It is a part of the embodiments of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings
The component of embodiment can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Inventor further investigation reveals that, most of emergency broadcase systems are difficult to different audio inputs effectively, in high quality broadcast
It puts.The amplitude for being primarily due to different audio inputs may be different, and the volume that this results in emergency broadcase system to play is excessive
Or it is too small, and then influence the audibility of broadcast.
And the common method that volume is adjusted mostly uses greatly pure digi-tal automatic gain controller (Automatic
Gain Control, AGC), but the audibility of broadcast is also difficult to improve using pure digi-tal AGC.
Defect present in the above scheme in the prior art, is that inventor is obtaining after practicing and carefully studying
As a result, therefore, the solution that the discovery procedure of the above problem and the hereinafter embodiment of the present invention are proposed regarding to the issue above
Scheme all should be the contribution that inventor makes the present invention in process of the present invention.
Based on the studies above, the embodiment of the invention provides a kind of emergent broadcast audio-frequency processing method and devices, are guaranteeing
It can be avoided distortion under the premise of broadcast sound volume is as big as possible, ensure that the audio signal of different amplitudes being capable of effective, high quality
Broadcasting.
Fig. 1 shows a kind of block diagram of server-side 10 provided by the embodiment of the present invention.In the embodiment of the present invention
Server-side 10 have data storage, transmission, processing function, as shown in Figure 1, server-side 10 includes: memory 11, processor
12, network module 13 and emergent broadcast apparatus for processing audio 20.
It is directly or indirectly electrically connected between memory 11, processor 12 and network module 13, to realize the biography of data
Defeated or interaction.It is electrically connected for example, these elements can be realized from each other by one or more communication bus or signal wire.
Emergent broadcast apparatus for processing audio 20 is stored in memory 11, the emergent broadcast apparatus for processing audio 20 includes at least one
The software function module that can be stored in the form of software or firmware (firmware) in the memory 11, the processor 12
By running at the emergent broadcast audio in the software program and module, such as the embodiment of the present invention that are stored in memory 11
Device 20 is managed, thereby executing various function application and data processing, i.e. emergent broadcast audio in the realization embodiment of the present invention
Processing method.
Wherein, the memory 11 may be, but not limited to, random access memory (Random Access Memory,
RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only
Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only Memory, EPROM),
Electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only Memory, EEPROM) etc..
Wherein, memory 11 is for storing program, and the processor 12 executes described program after receiving and executing instruction.
The processor 12 may be a kind of IC chip, the processing capacity with data.Above-mentioned processor 12
It can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc..It may be implemented or execute each method, step disclosed in the embodiment of the present invention and patrol
Collect block diagram.General processor can be microprocessor or the processor is also possible to any conventional processor etc..
Network module 13 is used to establish the communication connection between server-side 10 and other communication terminal devices by network, real
The transmitting-receiving operation of existing network signal and data.Above-mentioned network signal may include wireless signal or wire signal.
It is appreciated that structure shown in FIG. 1 is only to illustrate, server-side 10 may also include than shown in Fig. 1 more or more
Few component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can use hardware, software or its group
It closes and realizes.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the readable storage medium storing program for executing includes computer journey
Sequence.Server-side 10 computer program controls the readable storage medium storing program for executing when running where executes following emergent broadcast audio
Processing method.
It finds after many tests, ideal digital volume range is (- 6dBU, 0dBU), in order to guarantee to pass through emergency
The audio signal of broadcast system output is undistorted, needs to guarantee that there is no clippings when digital volume expires width (0dBU), however,
For inventor by carrying out research and analysis discovery to pure digi-tal AGC, pure digi-tal AGC can not restore the signal being limited, and
Noise can also be amplified when being amplified to the audio signal of lower digital volume, therefore, even if using pure digi-tal AGC,
Also it is difficult to effectively, in high quality play different audio signals.
Further, since analog-digital converter (Analog-to-Digital Converter, ADC) has gain adjustment
Function, meanwhile, the signal-to-noise ratio that analog-digital converter ADC is provided is much higher than the signal-to-noise ratio that pure digi-tal ADC is provided, therefore, the present embodiment
Core concept are as follows: the gain directly by adjusting analog-digital converter ADC carrys out the amplitude of Indirect method audio signal, and then controls
The volume of emergency broadcase system output.
Fig. 2 shows a kind of flow charts of emergent broadcast audio-frequency processing method provided by the embodiment of the present invention.The side
Method and step defined in the related process of method is applied to server-side 10, can be realized by the processor 12.It below will be to Fig. 2
Shown in detailed process be described in detail:
Please gather refering to Fig. 3, server-side 10 and analog-digital converter 40 communicate to connect, analog-digital converter 30 respectively with client
30 and output end 50 communicate to connect, it will be understood that server-side 10, analog-digital converter 40 and output end 50 constitute emergent broadcast system
System, the emergency broadcase system can be realized the processing to different audio signals, so effectively, output audio signal in high quality.
Step S21, control analog-digital converter receive the audio signal that client is sent.
Server-side 10 sends control instruction to analog-digital converter 40, receives the transmission of client 30 to control analog-digital converter 40
Audio signal, it will be understood that audio signal is analog signal.
In the present embodiment, client 30 can be mobile phone, telephone and MP3 etc..
Step S22 makes analog-digital converter convert audio signals into multiple digital signals according to setting sample rate.
It is appreciated that analog-digital converter 40 can convert analog signals into digital signal, in the present embodiment, setting is adopted
Sample rate can be 48kHz.
Analog-digital converter 40 can convert audio signals into multiple digital signals.Wherein, each digital signal is pulse
Modulation signals.
Step S23 obtains the amplitude of each digital signal.
In the present embodiment, server-side 10 can obtain in real time the amplitude of each digital signal from analog-digital converter 40, can
To understand, the multiple amplitudes got are continuous in time, in this way, being convenient for subsequent judgement and processing.
Step S24 obtains the judgement the knot whether amplitude is located at outside setting amplitude section for each amplitude got
Fruit is adjusted to realize the amplitude to each digital signal being converted to the gain of analog-digital converter according to judging result
Indirect method.
For example, being directed to each amplitude, judge whether the amplitude is located at outside setting amplitude section, in the present embodiment, setting
Amplitude section is (- 6dBU, 0dBU), if the amplitude is located at outside the section (- 6dBU, 0dBU), at the time of judgement to obtain the amplitude
Whether it is respectively positioned on outside the section (- 6dBU, 0dBU) for the amplitude in the setting duration of starting point, if so, according to setting gain delta pair
The gain of analog-digital converter 40 is adjusted, and is located in the section (- 6dBU, 0dBU) until at least having one in setting duration
Target amplitude, wherein the corresponding width of digital signal that target amplitude is converted to for the analog-digital converter 40 after gain adjustment
Value.
It is appreciated that amplitude is located at outside the section (- 6dBU, 0dBU) and is divided into two kinds of situations: a kind of situation be amplitude be lower than-
6dBU, another situation is that amplitude is more than 0dBU, and when amplitude is more than 0dBU, analog-digital converter 40 can limit amplitude
Width, it is assumed that amplitude 5dBU, analog-digital converter 40 can be by 5dBU clippings in 0dBU, therefore, according to judging result to analog-to-digital conversion
The gain of device 40 is adjusted to realize and be also classified into two kinds of feelings to the Indirect method of the amplitude for each digital signal being converted to
Condition: it carries out cumulative to the gain of analog-digital converter 40 and regressive is carried out to the gain of analog-digital converter 40.
After gain is cumulative or gain regressive, analog-digital converter 40 be can be realized to the multiple number letters being converted to
Number amplitude adjustment, and then adjust audio signal output volume.
It will be added up below by Fig. 4 and Fig. 5 to gain and gain regressive is illustrated.
For purposes of illustration only, the lower limit value in the section (- 6dBU, 0dBU) and upper limit value are respectively defined as the first setting value and
Two setting values, wherein the first setting value and the second setting value are for gain to be cumulative or the judgement of gain regressive.
The cumulative deterministic process of the gain of analog-digital converter 40 is illustrated first, please refers to Fig. 4.
It is located at the amplitude A outside the section (- 6dBU, 0dBU) with somexFor carry out saying for step S31 and subsequent step
It is bright:
Step S31, it is whether equal as each amplitude in the first setting duration of starting point at the time of judgement to obtain the amplitude
Lower than the first setting value.
If from amplitude A is obtainedxAt the time of for starting point first setting duration in each amplitude be below -6dBU, turn to
Otherwise step S32 turns to step S33.
It is found by actual measurement, when the amplitude that server-side 10 obtains is lower than -6dBU, the volume very little that output end 50 is broadcasted,
Therefore, it is necessary to the case where when detecting amplitude lower than -6dBU, further, some special audio signals may be a certain small
Amplitude in the section time is very low, in order to avoid the error detection of the signal special to these, needs to be arranged one first setting duration,
In the present embodiment, the first setting duration can be 5min.In other words, under non-mute state, if in some the first setting
Each amplitude in duration is below -6dBU, turns to step S32, otherwise turns to step S33.
Step S32 adds up to the gain of analog-digital converter according to the first setting gain delta, until in the first setting
At least there is the first object amplitude for being not less than the first setting value in duration.
Server-side 10 shows at this time when judging that each amplitude in some the first setting duration is below -6dBU
Audio signal is lower in the volume of output end 50, needs to tune up volume, and therefore, server-side 10 can increase according to the first setting gain
The gain of amount adjustment analog-digital converter 40, to realize the Indirect method to the amplitude of each digital signal, and then is realized to audio
The adjusting of signal volume.
In the present embodiment, it in order to avoid overregulating, needs to carry out Rational choice to the first setting gain delta, for example,
First setting gain delta can be 5dB, in another example, taking each amplitude in some first setting duration is -8dBU, at this time
Server-side 10 can control analog-digital converter 40 by gain add up 5dB so that some first setting duration in each amplitude
- 3dBU is become from -8dBU, -3dBU (first object amplitude) is located in the section (- 6dBU, 0dBU) at this time, shows this time to modulus
The gain adjustment of converter 40 is completed, and then determines to complete the processing to audio signal, the audio letter that output end 50 exports at this time
Number volume just in a stable range, ensure that and listen to efficiency, further, since the noise of analog-digital converter 40 compares
Height can be avoided the increase of the noise in audio signal when increasing gain, in this way, when guaranteeing that volume increases
It can also ensure that the quality of audio signal.
Optionally, if some is taken first to set each amplitude in duration as -13dBU, an analog-digital converter is completed
After 40 gain is cumulative, each amplitude in some first setting duration becomes -8dBU (first object amplitude), is still located on
Outside the section (- 6dBU, 0dBU), therefore, it is necessary to continue to add up to the gain of analog-digital converter 40, until cumulative, certain
Each amplitude in a first setting duration is located in the section (- 6dBU, 0dBU), therefore, the selection for the first setting increment
It is also required to combine actual conditions, if it is desired to which less adjustment number can suitably increase by the first setting increment.
Step S33 determines that audio signal is normal signal.
It is appreciated that be directed to multiple digital signals, if it does not exist it is any first setting duration in amplitude be respectively less than-
6dBU, it is possible to determine that multiple digital signals are normal signal, in other words, determine that audio signal is normal signal, there is no need to
It controls analog-digital converter 40 and carries out gain adjustment.
It is appreciated that above description is amplified to audio signal, that is to say, that can be improved the width of audio signal
Value, and guarantee the quality of audio signal, reduce noise.
Further, the gain regressive deterministic process of analog-digital converter 40 is illustrated, please refers to Fig. 5.
Step S41, it is whether equal as each amplitude in the second setting duration of starting point at the time of judgement to obtain the amplitude
Reach the second setting value.
It is appreciated that in the present embodiment, second a length of 0.3ms when setting, it is assumed that amplitude AyGreater than 0dBU, modulus at this time
Converter 40 can be to amplitude AyClipping is carried out, at this time amplitude Ay0dBU can be limited in, if from amplitude A is obtainedyAt the time of be starting point
0.3ms in each amplitude reach 0dBU, show that multiple digital signals are limited, therefore deduce that the width of audio signal
Value may be excessive, it is more likely that is distorted, turns to step S42 at this time, otherwise, turns to step S43.
Step S42 carries out regressive to the gain of analog-digital converter according to the second setting gain delta, until in the second setting
At least there is second target amplitude for not reaching the second setting value in duration.
Server-side 10 shows when the amplitude for judging in some the second setting duration (0.3ms) reaches -0.1dBU
Analog-digital converter 40 has carried out clipping to audio signal, will lead to the distortion of audio signal in this way, needs to turn down volume, because
This, server-side 10 can be according to the gain of the second setting gain delta adjustment analog-digital converter 40.
In the present embodiment, second setting increment can be 6dB, in another example, take some second setting duration in each of
Amplitude is 10dBU, at this time server-side 10 can control analog-digital converter 40 by gain reduce 6dB so that some second setting when
Each amplitude in length becomes 4dBU from 10dBU, and 4dBU (the second target amplitude) is still located on the section (- 6dBU, 0dBU) at this time
Outside, therefore, server-side 10 needs to be further reduced the gain of analog-digital converter 40, so that in some second setting duration
Each amplitude is located in the section (- 6dBU, 0dBU), in another example, after the regressive of gain twice for completing analog-digital converter 40, because
This, some second sets each amplitude in duration as -2dBU, is located in the section (- 6dBU, 0dBU), it is therefore contemplated that complete
Pairs of audio signal.
Interacting for adjusting, the first setting gain delta and the second setting are reduced with gain in view of gain increase is adjusted
Gain delta should not all select excessive, otherwise can enter the endless loop that infinitely adjusts.It can be set according to the actual situation to first
Gain delta and the second setting gain delta are rationally modified, wherein server-side 10 is available for modifying the first gain
The modification of increment instructs, and parsing obtains the first object gain delta for including in modification instruction.
Further, server-side 10 judges whether first object gain delta reaches siding-to-siding block length value, if reaching, refusal
To the first setting gain delta, otherwise, the first setting gain delta is revised as by first object gain delta according to modification instruction.
In the present embodiment, siding-to-siding block length value is the absolute value of the difference of the first setting value and the second setting value, in another example,
In view of the precision of analog-digital converter 40, taking the first setting value is -6dBU, and taking the second setting value is -0.1dBU, in other words,
When analog-digital converter 40 carries out clipping to digital signal, it is limited in -0.1dBU and can consider digital signal is limited in 0dBU.
Therefore, siding-to-siding block length value is 5.9dB, that is to say, that when modifying to the first setting gain delta, first object gain increases
Amount cannot reach 5.9dB, otherwise, carry out that the section (- 6dBU, 0dBU) may be directed across when gain is cumulative, similarly, right
Second setting gain delta should also be as meeting above-mentioned requirements when modifying, and so, it is possible effectively to avoid analog-digital converter
40 enter gain adjustment endless loop.
Step S43 determines that audio signal is normal signal.
It is appreciated that in actual application environment, for multiple digital signals, if it does not exist in any second setting duration
Amplitude reach -0.1dBU, it is possible to determine that multiple digital signals be normal signal, in other words, determine audio signal be positive
Regular signal, there is no need to control analog-digital converter 40 to carry out gain adjustment.
In the present embodiment, server-side 10 can both control the progress gain of analog-digital converter 40 and add up, and be believed with realizing in height
It makes an uproar and audio signal is amplified than under the conditions of, and analog-digital converter 40 can be controlled and carry out gain regressive, to realize to clipping
Audio signal reduced, in this way, guarantee broadcast sound volume it is as big as possible under the premise of can be avoided distortion, ensure that difference
The audio signal of amplitude being capable of effective, high quality broadcasting.
On the basis of the above, as shown in fig. 6, the embodiment of the invention provides a kind of emergent broadcast apparatus for processing audio 20,
The emergent broadcast apparatus for processing audio 20 includes: audio signal reception module 21, digital signal obtains module 22, amplitude obtains
Module 23 and gain regulation module 24.
Audio signal reception module 21, for controlling the analog-digital converter real-time reception audio signal.
Since audio signal reception module 21 is similar with the realization principle of step S21 in Fig. 2, do not say more herein
It is bright.
Digital signal obtains module 22, for turning the analog-digital converter by the audio signal according to setting sample rate
It is changed to multiple digital signals.
Since digital signal acquisition module 22 is similar with the realization principle of step S22 in Fig. 2, do not say more herein
It is bright.
Amplitude obtains module 23, for obtaining the amplitude of each digital signal.
Since amplitude acquisition module 23 is similar with the realization principle of step S23 in Fig. 2, do not illustrate more herein.
Gain regulation module 24, for judging whether the amplitude is located at setting amplitude area for each amplitude got
Between it is outer, if the amplitude is located at outside the setting amplitude section, as in the setting duration of starting point at the time of judgement to obtain the amplitude
Each amplitude whether be respectively positioned on outside the setting amplitude section, if each amplitude in the setting duration be respectively positioned on it is described
It sets outside amplitude section, the gain of the analog-digital converter is adjusted according to setting gain delta, until when the setting
At least there is the target amplitude being located in the setting amplitude section in long；Wherein, the target amplitude is gain adjustment
The corresponding amplitude of the digital signal that analog-digital converter later is converted to.
Since gain regulation module 24 is similar with step S24 realization principle in Fig. 2, do not illustrate more herein.
To sum up, emergent broadcast audio-frequency processing method and device provided by the embodiment of the present invention are guaranteeing that broadcast sound volume is most
It can be avoided distortion under the premise of possibility is big, ensure that the audio signal of different amplitudes being capable of effective, high quality broadcasting.
In several embodiments provided by the embodiment of the present invention, it should be understood that disclosed device and method, it can also
To realize by another way.Device and method embodiment described above is only schematical, for example, in attached drawing
Flow chart and block diagram show that the devices of multiple embodiments according to the present invention, method and computer program product are able to achieve
Architecture, function and operation.In this regard, each box in flowchart or block diagram can represent module, a program
A part of section or code, a part of the module, section or code include that one or more is patrolled for realizing defined
Collect the executable instruction of function.It should also be noted that in some implementations as replacement, function marked in the box
It can occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be held substantially in parallel
Row, they can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/or
The combination of each box in flow chart and the box in block diagram and or flow chart, can the function as defined in executing or dynamic
The dedicated hardware based system made is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server-side 10 or the network equipment etc.) execute all or part of step of each embodiment the method for the present invention
Suddenly.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), deposits at random
The various media that can store program code such as access to memory (RAM, Random Access Memory), magnetic or disk.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of emergent broadcast audio-frequency processing method, which is characterized in that be applied to server-side, the server-side is communicatively coupled to mould
Number converter, which comprises
Control the analog-digital converter real-time reception audio signal；
Make the analog-digital converter that the audio signal are converted to multiple digital signals according to setting sample rate；
Obtain the amplitude of each digital signal；
For each amplitude got, judge whether the amplitude is located at outside setting amplitude section, if the amplitude is located at described set
Whether it is respectively positioned on outside tentering value section, at the time of judgement to obtain the amplitude as each amplitude in the setting duration of starting point described
It sets outside amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to setting
Gain delta is adjusted the gain of the analog-digital converter, until at least having one in the setting duration positioned at described
Set the target amplitude in amplitude section；Wherein, the target amplitude is that the analog-digital converter after gain adjustment is converted to
The corresponding amplitude of digital signal.
2. emergent broadcast audio-frequency processing method according to claim 1, which is characterized in that judge with obtain the amplitude when
Whether each amplitude carved in the setting duration for being starting point is respectively positioned on outside the setting amplitude section, if in the setting duration
Each amplitude be respectively positioned on outside the setting amplitude section, the gain of the analog-digital converter is carried out according to setting gain delta
Adjustment, until at least there is the step of target amplitude being located in the setting amplitude section, packet in the setting duration
It includes:
The first setting whether is below as each amplitude in the first setting duration of starting point at the time of judgement to obtain the amplitude
Value；
If each amplitude in the first setting duration is below first setting value, according to the first setting gain delta
It adds up to the gain of the analog-digital converter, until at least having one in the first setting duration not less than described
The first object amplitude of first setting value；Wherein, the first object amplitude is the analog-digital converter conversion after gain is cumulative
The corresponding amplitude of obtained digital signal, first setting value are the lower limit value in the setting amplitude section.
3. emergent broadcast audio-frequency processing method according to claim 1, which is characterized in that judge with obtain the amplitude when
Whether each amplitude carved in the setting duration for being starting point is respectively positioned on outside the setting amplitude section, if in the setting duration
Each amplitude be respectively positioned on outside the setting amplitude section, the gain of the analog-digital converter is carried out according to setting gain delta
Adjustment, until at least there is the step of target amplitude being located in the setting amplitude section, packet in the setting duration
It includes:
Whether reach the second setting as each amplitude in the second setting duration of starting point at the time of judgement to obtain the amplitude
Value；
If each amplitude in the second setting duration reaches second setting value, according to the second setting gain delta
Regressive is carried out to the gain of the analog-digital converter, until at least having one in the second setting duration does not reach institute
State the second target amplitude of the second setting value；Wherein, second target amplitude is that the analog-digital converter after gain regressive turns
The corresponding amplitude of the digital signal got in return, second setting value are the upper limit value in the setting amplitude section.
4. emergent broadcast audio-frequency processing method according to claim 2, which is characterized in that the method also includes:
The modification instruction for modifying the first setting gain delta is obtained, parsing obtains include in the modification instruction the
One target gain increment；
Obtain the siding-to-siding block length value in the setting amplitude section；
Judge whether the first object gain delta reaches the siding-to-siding block length value, if the first object gain delta reaches
The siding-to-siding block length value, refusal execute the modification and instruct, if not reach the section long for the first object gain delta
The first setting gain delta is revised as the first object gain delta according to modification instruction by angle value.
5. emergent broadcast audio-frequency processing method according to claim 4, which is characterized in that obtain the setting amplitude section
Siding-to-siding block length value the step of, comprising:
Obtain it is described setting amplitude section one of endpoint at amplitude and as the first setting value, obtain the setting width
It is worth the amplitude at another endpoint in section and as the second setting value；
Calculate the absolute value of the difference of first setting value and second setting value；
The absolute value as the siding-to-siding block length value and is obtained.
6. a kind of emergent broadcast apparatus for processing audio, which is characterized in that be applied to server-side, the server-side is communicatively coupled to mould
Number converter, described device include:
Audio signal reception module, for controlling the analog-digital converter real-time reception audio signal；
Digital signal obtains module, more for being converted to the analog-digital converter by the audio signal according to setting sample rate
A digital signal；
Amplitude obtains module, for obtaining the amplitude of each digital signal；
Gain regulation module, for judging whether the amplitude is located at outside setting amplitude section for each amplitude got, if
The amplitude is located at outside the setting amplitude section, as each width in the setting duration of starting point at the time of judgement to obtain the amplitude
Whether value is respectively positioned on outside the setting amplitude section, if each amplitude in the setting duration is respectively positioned on the setting amplitude
Outside section, the gain of the analog-digital converter is adjusted according to setting gain delta, until in the setting duration at least
The target amplitude being located in the setting amplitude section there are one；Wherein, the target amplitude is the mould after gain adjustment
The corresponding amplitude of the digital signal that number converter is converted to.
7. emergent broadcast apparatus for processing audio according to claim 6, which is characterized in that the gain regulation module passes through
The setting whether is respectively positioned on as each amplitude in the setting duration of starting point at the time of following manner judges to obtain the amplitude
Outside amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to setting gain
Increment is adjusted the gain of the analog-digital converter, until at least having one in the setting duration is located at the setting
Target amplitude in amplitude section:
The first setting whether is below as each amplitude in the first setting duration of starting point at the time of judgement to obtain the amplitude
Value；
If each amplitude in the first setting duration is below first setting value, according to the first setting gain delta
It adds up to the gain of the analog-digital converter, until at least having one in the first setting duration not less than described
The first object amplitude of first setting value；Wherein, the first object amplitude is the analog-digital converter conversion after gain is cumulative
The corresponding amplitude of obtained digital signal, first setting value are the lower limit value in the setting amplitude section.
8. emergent broadcast apparatus for processing audio according to claim 6, which is characterized in that the gain regulation module passes through
The setting whether is respectively positioned on as each amplitude in the setting duration of starting point at the time of following manner judges to obtain the amplitude
Outside amplitude section, if each amplitude in the setting duration is respectively positioned on outside the setting amplitude section, according to setting gain
Increment is adjusted the gain of the analog-digital converter, until at least having one in the setting duration is located at the setting
Target amplitude in amplitude section:
Whether reach the second setting as each amplitude in the second setting duration of starting point at the time of judgement to obtain the amplitude
Value；
If each amplitude in the second setting duration reaches second setting value, according to the second setting gain delta
Regressive is carried out to the gain of the analog-digital converter, until at least having one in the second setting duration does not reach institute
State the second target amplitude of the second setting value；Wherein, second target amplitude is that the analog-digital converter after gain regressive turns
The corresponding amplitude of the digital signal got in return, second setting value are the upper limit value in the setting amplitude section.
9. emergent broadcast apparatus for processing audio according to claim 7, which is characterized in that described device further include:
Modified module, for obtaining the modification instruction for modifying the first setting gain delta, parsing obtains the modification
The first object gain delta for including in instruction；Obtain the siding-to-siding block length value in the setting amplitude section；Judge first mesh
Whether mark gain delta reaches the siding-to-siding block length value, if the first object gain delta reaches the siding-to-siding block length value, refuses
The modification instruction is executed absolutely, if the first object gain delta does not reach the siding-to-siding block length value, according to the modification
The first setting gain delta is revised as the first object gain delta by instruction.
10. emergent broadcast apparatus for processing audio according to claim 9, which is characterized in that the modified module by with
Under type obtains the siding-to-siding block length value in the setting amplitude section:
Obtain it is described setting amplitude section one of endpoint at amplitude and as the first setting value, obtain the setting width
It is worth the amplitude at another endpoint in section and as the second setting value；
Calculate the absolute value of the difference of first setting value and second setting value；
The absolute value as the siding-to-siding block length value and is obtained.
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