CN106535062A - Dante digital audio processing method, system and device based on DSP - Google Patents
Dante digital audio processing method, system and device based on DSP Download PDFInfo
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- CN106535062A CN106535062A CN201611062346.XA CN201611062346A CN106535062A CN 106535062 A CN106535062 A CN 106535062A CN 201611062346 A CN201611062346 A CN 201611062346A CN 106535062 A CN106535062 A CN 106535062A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The invention discloses a Dante digital audio processing method, system and device based on DSP. The method comprises the following steps of step 1, controlling and adjusting audio level characteristics of input audio signals; step 2, adjusting frequency response characteristics of each frequency band of the audio signals of which the audio level characteristics are adjusted; step 3, implementing frequency division on the audio signals which are subjected to input equalization; and step 4, adjusting the frequency response characteristics of each frequency band of the audio signals which are subjected to frequency division to realize output equalization for the audio signals. According to the Dante digital audio processing method, system and device based on DSP disclosed by the invention, analog audio signals, AES3 digital audio signals and Dante network audio signals can be optionally input, and high sound quality and low time delay can be realized through the independent audio level characteristic adjustment and multi-stage equalization adjustment on four channels.
Description
Technical field
A kind of the present invention relates to Audio Signal Processing field, more particularly to Dante digital audio processing sides based on DSP
Method, system and device.
Background technology
It has been a technology focus of professional audio industry based on the Digital Audio Transmission technology of Ethernet, and has been disobeyed with which
Rely characteristic self-existent in control system, be widely applied in many projects.On the one hand it solves multi cloth
Line difficult problem, while also solve that long-distance transmissions, data backup, automatic redundancy etc. are a series of cannot in the analogue transmission epoch
The problem for facing.The Ethernet audio transmission techniques of comparative maturity mainly have CobraNet and EtherSound technologies at present, but
Both technologies are all each has something to recommend him.On this basis, in order to more cater to the demand in market, Audinate be proposed Dante this
Plant the Digital Audio Transmission technology for having merged many new techniques.
Dante is a kind of Digital Audio Transmission mode of the IP network technology based on 3 layers, and which is point-to-point audio frequency connection
There is provided the solution of a kind of low delay, high accuracy and low cost.Dante technologies can Ethernet (100M or
High accurate clock signal and professional audio signal are transmitted on 1000M) and the route of complexity can be carried out.With in the past traditional sound
Keep pouring in transferring technology to compare, it inherits CobraNet and all of advantages of EtherSound, the digital audio and video signals such as without compression,
Ensure that good acoustical quality；Numerous and diverse wiring problem in conventional audio transmission is solved, cost is reduced；Adapt to existing net
Network, need not do particular arrangement；Audio signal in network, is all labeled in the form of " label ".In prior art not
Having carry out the related of Audio Processing by what simulated audio signal, AES3 digital audio and video signals and Dante network audio signals were combined
Report.
The content of the invention
In order to overcome the deficiencies in the prior art, an object of the present invention is that a kind of Dante based on DSP of offer is digital
Audio-frequency processing method, which realizes the washability to simulated audio signal, AES3 digital audio and video signals and Dante network audio signals
Input, is adjusted by carrying out independent audio level characteristic to four-way, and Jing multistage well-balanced adjustments reach high tone quality and low prolong
When.
For achieving the above object, the technical solution used in the present invention is：
A kind of Dante digital audio frequency processing methods based on DSP, comprise the following steps：
The audio level characteristic of step 1, the audio signal for controlling and adjusting input；
Step 2, the frequency response characteristic to each frequency range of the audio signal after the regulation of audio level characteristic are adjusted, with
Realization carries out input uniform process to audio signal；
Step 3, to input uniform process after audio signal carry out scaling down processing；
Step 4, the frequency response characteristic to each frequency range of the audio signal after scaling down processing are adjusted, to realize to sound
Frequency signal carries out output equilibrium treatment；
Wherein, the input uniform is processed as 6 sections of second order IIR filters, and the scaling down processing includes high pass or low pass
Selection and the control that adjusts of gain and polarity, the output equilibrium treatment is 8 sections of second order IIR filters and described 8 section two
Rank wave filter can be adjusted to frequency, bandwidth and gain.
The audio signal being input in step 1 is simulated audio signal, AES3 digital audio and video signals and Dante DABs letter
Number one or more.
The audio signal being input in step 1 is divided into four-way by passage route system, carries out per passage independent
Audio level characteristic is adjusted.
After audio level characteristic described in step 1, input pattern and output mode are carried out selecting a selection, is wherein input into
Pattern includes that stereophonic sum signal is added, and output mode includes parallel connection and bridge joint.
It is further comprising the steps of after step 4：
Step 5, to export equilibrium treatment after audio signal carry out delay process, the delay process is with time or length
It is adjusted for adjusting unit；
Step 6, amplitude limiting processing is carried out to the audio signal after delay process, the amplitude limiting processing is off, -3dB, -6dB
With the one kind in -12dB.
Another object of the present invention is to provide a kind of Dante digital audio processing systems based on DSP, which is realized to mould
Intend the washability input of audio signal, AES3 digital audio and video signals and Dante network audio signals, by carrying out solely to four-way
Vertical audio level characteristic is adjusted, and Jing multistage well-balanced adjustments reach high tone quality and low delay.
For achieving the above object, the technical solution used in the present invention is：
A kind of Dante digital audio processing systems based on DSP, which includes：
Electrical level control unit, for controlling and adjusting the audio level characteristic of the audio signal of input；
Input equalizer unit, the frequency response for each frequency range of the audio signal after adjusting to audio level characteristic are special
Property be adjusted, with realize input uniform process is carried out to audio signal；
Frequency unit, carries out scaling down processing for the audio signal after processing to input uniform；
Output equalizer unit, for adjusting to the frequency response characteristic of each frequency range of the audio signal after scaling down processing
Section, to realize carrying out output equilibrium treatment to audio signal；
Wherein, the input uniform is processed as 6 sections of second order IIR filters, and the output equilibrium treatment is 8 sections of second order IIR
Wave filter and 8 sections of second order filters can be adjusted to frequency, bandwidth and gain.
Also include：
Delay unit, for carrying out delay process to exporting the audio signal after equilibrium treatment, the delay process with when
Between or length for adjustment unit be adjusted；
Clipping unit, for carrying out amplitude limiting processing to the audio signal after delay process, the amplitude limiting processing be off ,-
One kind in 3dB, -6dB and -12dB.
The further object of the present invention is to provide a kind of Dante digital audio processing devices based on DSP, and which realizes right
The washability input of simulated audio signal, AES3 digital audio and video signals and Dante network audio signals, by carrying out to four-way
Independent audio level characteristic is adjusted, and Jing multistage well-balanced adjustments reach high tone quality and low delay.
For achieving the above object, the technical solution used in the present invention is：
A kind of Dante digital audio processing devices based on DSP, which includes：
Dsp processor, for performing the above-mentioned Dante digital audio frequency processing methods based on DSP；
Audio Input Modules, for dsp processor input audio signal；Wherein, the Audio Input Modules include：
Balanced analog signals input module, which passes through A/D converter and is connected to dsp processor, for defeated to dsp processor
Enter simulated audio signal；
AES3 digital signal input modules, which is connected directly to dsp processor, for being input into AES3 numbers to dsp processor
Word audio signal；
Dante network digital signal input modules, which passes through Digital audio process module and is connected to dsp processor, is used for
Dante network digital audio signals are input into dsp processor；
Power amplifier module, the dsp processor are connected with the power amplifier module by D/A converter, and dsp processor is processed
Audio signal afterwards sends to the power amplifier module and plays out.
Also include entering power amplifier module temperature detecting module, the voltage that trip temperature, voltage, electric current and impedance are acquired
Detection module, current detection module and impedance detection module, the temperature detecting module, voltage detection module, current detecting
Module and impedance detection module are connected to dsp processor.
Also include touch control display module, the touch control display module is connected with dsp processor, tactile for sending
Control instruction is touched to dsp processor, and receives temperature detecting module, voltage detection module, current detection module and impedance inspection
Survey the collection information of module.
Compared to existing technology, beneficial effects of the present invention are at least as follows：
1st, numerous functions are integrated by the DSP audio processing algorithms of high speed, it is innovative including one
Passage route system, interior nuclear engineering debug real-time analyzer, the real-time management system of audio amplifier load, and built-in two passage and
The revolutionary global function DAB DSP signal processing systems of four-way.
2nd, optional simulation, the various audio input modes of AES3 and Dante Digital Transmission cards, can meet the net of DAB
Network is transmitted and amplifies output；Networking serial ports, third party's remote control function are provided, are also equipped with auto sleep and signal is waken up
Deng.
3rd, all touch screen presentation control function menu, full editting function color screen touch control, institute is functional can be shown
In screen, operation is completed.
Description of the drawings
Fig. 1 is Dante digital audio frequency processing method schematic flow sheet of the embodiment of the present invention based on DSP；
Fig. 2 is structural representation of the embodiment of the present invention based on the Dante digital audio processing devices of DSP.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the present invention is described further：
Refer to shown in Fig. 1, a kind of Dante digital audio frequency processing methods based on DSP, which comprises the following steps：
Step 1, signal input.Signal input has three kinds：Simulated audio signal is input into, AES3 digital audio and video signals are input into,
Dante digital networks audio signal is input into, and wherein, Dante digital network audio signals have low delay, without conventional analog signal
Interference, can at a distance up to 512 channel digital signal simultaneous transmissions, can be with point-to-point, or the free switching of point-to-multipoint is passed
Defeated function.Simulated audio signal directly passes through cable by A/D converter, AES3 digital audio and video signals and Dante is digital
Network audio signal is sent into dsp processor by corresponding Dante Digital audio process modules and is processed, and dsp processor is held
The operation of row following steps 2-7.
Step 2, input pattern (INPUT Mode) or output mode (OUTPUT Mode) receive the input of step 1
After signal, four-way (CH1-CH4) is divided into by path routing algorithm, then independent four-way carries out Automatic level control, institute
The Automatic level control of meaning, is exactly the audio level characteristic to input signal, after Automatic level control process, input pattern selection is processed
(there is both of which：Stereo, signal is added), signal output model selection process (have both of which：In parallel, bridge mode).
Step 3, the frequency response characteristic to each frequency range of the audio signal after the regulation of audio level characteristic are adjusted, with
Realization carries out input uniform (EQ) process to audio signal.Input uniform includes 6 sections of second order IIR filters (referred to as 6 sections EQ)
Plus the function treatment of the high low-pass filtering of the preceding paragraph, wherein, wherein 2 sections of 6 sections of EQ of input are selected for multiclass mode filter, filter more
Device type include (Linkwitz-Riley (or Butterworth or Bessel)/6dB/oct, 12dB/oct, 18dB/oct,
24dB/oct/, 30dB/oct, 36dB/oct, 48dB/oct etc..
Step 4, (X-Over) process is divided to the audio signal after input uniform process, the type of frequency dividing has height
Logical, low pass is selected, the control that also gain and polarity are adjusted.
Step 5, the frequency response characteristic to each frequency range of the audio signal after scaling down processing are adjusted, to realize to sound
Frequency signal carries out output balanced (output EQ) and processes.Output equilibrium treatment is 8 sections of second order IIR filters and 8 sections of second-order filters
Device can be adjusted to mid frequency (frequency), Q-value (Q-value is equal to mid frequency divided by bandwidth).
Step 6, delay process is carried out to exporting the audio signal after equilibrium treatment, time delay is most long up to 0.9 second, at time delay
Reason can be adjusted with time or length as adjusting unit.
Step 7, amplitude limiting processing is carried out to the audio signal after delay process, the amplitude limiting processing is off, -3dB, -6dB
With the one kind in -12dB.
Step 8, to above-mentioned dsp processor process after audio signal exported (play) by power amplifier unit.
Corresponding to the Dante digital audio frequency processing methods based on DSP, the present invention also provides a kind of Dante based on DSP
Digital audio processing system, which includes：
Electrical level control unit, for controlling to adjust the audio level characteristic of the audio signal of input；
Input equalizer unit, the frequency response for each frequency range of the audio signal after adjusting to audio level characteristic are special
Property be adjusted, with realize input uniform process is carried out to audio signal；
Frequency unit, carries out scaling down processing for the audio signal after processing to input uniform；
Output equalizer unit, for adjusting to the frequency response characteristic of each frequency range of the audio signal after scaling down processing
Section, to realize carrying out output equilibrium treatment to audio signal；
Delay unit, for carrying out delay process to exporting the audio signal after equilibrium treatment, the delay process with when
Between or length for adjustment unit be adjusted；
Clipping unit, for carrying out amplitude limiting processing to the audio signal after delay process, the amplitude limiting processing be off ,-
One kind in 3dB, -6dB and -12dB.
Refer to shown in Fig. 2, present invention also offers a kind of Dante digital audio processing devices based on DSP, its bag
Include：
Audio Input Modules, for dsp processor input audio signal；Wherein, the Audio Input Modules include：It is flat
Weighing apparatus analogue signal input module, which passes through A/D converter and is connected to dsp processor, for being input into analogue audio frequency to dsp processor
Signal；AES3 digital signal input modules, which passes through cable and is connected directly to dsp processor, for being input into dsp processor
AES3 digital audio and video signals；Dante network digital signal input modules, the Dante network numbers that its reception is transmitted from outside RJ45
The reception of the network control signal of word audio signal and 100M simultaneously passes through Dante Digital audio process modules (Dante DABs
Processing module is processed to the digital network audio signal and control signal of transmission, and digital audio and video signals are transferred to DSP process,
Control signal and MCU connections) dsp processor is connected to, for being input into Dante network digital audio signals to dsp processor.
Dsp processor, AES3 digital audio and video signals, analogue audio frequency through analog digital conversion after of the dsp processor to input
The Dante network digital audio signals of signal and Dante network transmissions are processed.Process include passway by, be input into EQ, X-
Over, exports the DAB algorithm process of EQ, time delay, phase adjustment, amplitude limit etc., that is, perform above-mentioned steps 2-7.
Power amplifier module, the dsp processor are connected with the power amplifier module by D/A converter, and dsp processor is processed
Audio signal afterwards sends to the power amplifier module and is exported.Power amplifier module kernel power amplifier, power discharging radiator work
The detection and management and control of the management and control of temperature, supply voltage and electric current.
Power amplifier module is entered trip temperature, the temperature detecting module that voltage (supply voltage), electric current and impedance are acquired,
Voltage detection module, current detection module and impedance detection module, the temperature detecting module, voltage detection module, electric current
Detection module and impedance detection module are connected to dsp processor.The operating temperature of real-time detection power amplifier module, voltage, electricity
Stream, the power of adjust automatically output, make power amplifier module be operated in optimal working condition；Real time load impedance analysis, sentence automatically
The audio amplifier loading condition connect by disconnected power amplifier, determines whether audio amplifier has open circuit or the short circuit of audio amplifier line all occur, and can be in start
Afterwards, the audio curve of the whole audio amplifier of automatically scanning, automatic decision analyze the working condition of connect sound box system, it is ensured that user uses
It is normal good.
And touch control display module, the touch control display module is connected with dsp processor, for sending touch
Control instruction is to dsp processor, and receives temperature detecting module, voltage detection module, current detection module and impedance detection
The collection information of module.The data that dsp processor is received from the external control signal of touch control display module input are sent to
The real time data of dsp processor or dsp processor is delivered to after MCU is processed and is shown to module 7, and MCU is also to power amplifier mould
Deblocking temperature, voltage, electric current, the size of signal are analyzed and process, MCU also to power amplifier load impedance data be analyzed and
Process.Wherein, dsp processor and MCU can be realized by same dsp processor, it is also possible to be performed separately.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (10)
1. a kind of Dante digital audio frequency processing methods based on DSP, it is characterised in that comprise the following steps：
The audio level characteristic of step 1, the audio signal for controlling and adjusting input；
Step 2, the frequency response characteristic to each frequency range of the audio signal after the regulation of audio level characteristic are adjusted, to realize
Input uniform process is carried out to audio signal；
Step 3, to input uniform process after audio signal carry out scaling down processing；
Step 4, the frequency response characteristic to each frequency range of the audio signal after scaling down processing are adjusted, to realize believing audio frequency
Number carry out output equilibrium treatment；
Wherein, the input uniform is processed as 6 sections of second order IIR filters, and the scaling down processing includes the choosing of high pass or low pass
Select, and the control that adjusts of gain and polarity, the output equilibrium treatment is that 8 sections of second order IIR filters and 8 sections of second orders are filtered
Ripple device can be adjusted to frequency, bandwidth and gain.
2. Dante digital audio frequency processing methods based on DSP according to claim 1, it is characterised in that defeated in step 1
One or more for simulated audio signal, AES3 digital audio and video signals and Dante digital audio and video signals of the audio signal for entering.
3. Dante digital audio frequency processing methods based on DSP according to claim 1, it is characterised in that defeated in step 1
The audio signal for entering is divided into four-way by passage route system, carries out independent audio level characteristic per passage and adjusts.
4. Dante digital audio frequency processing methods based on DSP according to claim 1, it is characterised in that institute in step 1
After stating audio level characteristic, carry out selecting a selection to input pattern and output mode, wherein input pattern include it is stereo and
Signal is added, and output mode includes parallel connection and bridge joint.
5. Dante digital audio frequency processing methods based on DSP according to claim 1, it is characterised in that after step 4
It is further comprising the steps of：
Step 5, delay process is carried out to exporting the audio signal after equilibrium treatment, the delay process is with time or length as adjusting
Whole unit is adjusted；
Step 6, carry out amplitude limiting processing to the audio signal after delay process, the amplitude limiting processing be off, -3dB, -6dB and -
One kind in 12dB.
6. a kind of Dante digital audio processing systems based on DSP, it is characterised in which includes：
Electrical level control unit, for controlling and adjusting the audio level characteristic of the audio signal of input；
Input equalizer unit, the frequency response characteristic for each frequency range of the audio signal after adjusting to audio level characteristic enter
Row is adjusted, to realize carrying out input uniform process to audio signal；
Frequency unit, carries out scaling down processing for the audio signal after processing to input uniform；
Output equalizer unit, for being adjusted to the frequency response characteristic of each frequency range of the audio signal after scaling down processing,
To realize carrying out output equilibrium treatment to audio signal；
Wherein, the input uniform is processed as 6 sections of second order IIR filters, and the output equilibrium treatment is 8 sections of second order IIR filtering
Device and 8 sections of second order filters can be adjusted to frequency, bandwidth and gain.
7. Dante digital audio processing systems based on DSP according to claim 6, it is characterised in that also include：
Delay unit, for carrying out delay process to exporting the audio signal after equilibrium treatment, the delay process with the time or
Length is adjusted for adjustment unit；
Clipping unit, for carrying out amplitude limiting processing to the audio signal after delay process, the amplitude limiting processing be off, -3dB, -
One kind in 6dB and -12dB.
8. a kind of Dante digital audio processing devices based on DSP, it is characterised in which includes：
Dsp processor, requires the Dante digital audio frequency processing methods based on DSP described in any one of 1-5 for perform claim；
Audio Input Modules, for dsp processor input audio signal；Wherein, the Audio Input Modules include：
Balanced analog signals input module, which passes through A/D converter and is connected to dsp processor, for being input into mould to dsp processor
Intend audio signal；
AES3 digital signal input modules, which is connected directly to dsp processor, for dsp processor input AES3 numeral sounds
Frequency signal；
Dante network digital signal input modules, which passes through Digital audio process module and is connected to dsp processor, for DSP
Processor is input into Dante network digital audio signals；
Power amplifier module, the dsp processor are connected with the power amplifier module by D/A converter, after dsp processor is processed
Audio signal sends to the power amplifier module and plays out.
9. Dante digital audio processing devices based on DSP according to claim 8, it is characterised in that also include to work(
Amplification module enters the temperature detecting module that trip temperature, voltage, electric current and impedance be acquired, voltage detection module, current detecting
Module and impedance detection module, the temperature detecting module, voltage detection module, current detection module and impedance detection mould
Block is connected to dsp processor.
10. Dante digital audio processing devices based on DSP according to claim 9, it is characterised in that also including touching
Control display module is touched, the touch control display module is connected with dsp processor, is instructed to DSP for sending touch control
Processor, and receive the collection letter of temperature detecting module, voltage detection module, current detection module and impedance detection module
Breath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611062346.XA CN106535062A (en) | 2016-11-25 | 2016-11-25 | Dante digital audio processing method, system and device based on DSP |
| PCT/CN2017/093282 WO2018095057A1 (en) | 2016-11-25 | 2017-07-18 | Method, system and device for dsp-based dante digital audio processing |
Applications Claiming Priority (1)
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| CN201611062346.XA CN106535062A (en) | 2016-11-25 | 2016-11-25 | Dante digital audio processing method, system and device based on DSP |
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| CN201611062346.XA Pending CN106535062A (en) | 2016-11-25 | 2016-11-25 | Dante digital audio processing method, system and device based on DSP |
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| CN108630218A (en) * | 2018-04-28 | 2018-10-09 | 广东技术师范学院 | A kind of processing method and system of digital audio-frequency data filtering |
| CN110769337A (en) * | 2019-10-24 | 2020-02-07 | 上海易和声学科技有限公司 | Active array sound post and sound equipment system |
| CN111556405A (en) * | 2020-04-09 | 2020-08-18 | 北京金茂绿建科技有限公司 | Power amplifier chip and electronic equipment |
| CN115065910A (en) * | 2021-06-04 | 2022-09-16 | 广州美立达电子技术有限公司 | Using method of sound system with audio and control signal collinear transmission function |
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| WO2018095057A1 (en) | 2018-05-31 |
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