CN110072174A - Volume adaptive identifying machine - Google Patents
Volume adaptive identifying machine Download PDFInfo
- Publication number
- CN110072174A CN110072174A CN201910425356.2A CN201910425356A CN110072174A CN 110072174 A CN110072174 A CN 110072174A CN 201910425356 A CN201910425356 A CN 201910425356A CN 110072174 A CN110072174 A CN 110072174A
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- China
- Prior art keywords
- volume
- gain
- audio signal
- broadcast
- power amplifier
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Classifications
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
The invention discloses a kind of volume adaptive identifying machines, including the audio signal source being once linked in sequence, electronic strobe switch, balancing circuitry, gain circuitry and power amplifier and loudspeaker and noise transducer, audio signal gain adjusting circuit, processor, display and input equipment, the data of the noise transducer of broadcast live are arranged in for real-time reception for the audio signal gain adjusting circuit, and the gain adjustment to gain circuitry is realized according to the data of noise transducer, and then realize audio signal gain plus-minus, reach the power for adjusting power amplifier output volume；The distinct interface of the processor is connect with the control terminal of the output end of the electronic strobe switch and the audio signal gain adjusting circuit respectively, and with display and input equipment.It is an advantage of the invention that can be more perfect solve above-mentioned problem, volume is forced down when quiet in scene, again automatic when noisy to improve volume.
Description
Technical field
The present invention relates to a kind of volume adaptive identifying machines, and volume output, scene can be reduced in broadcast live peace and quiet
It is again automatic when noisy to improve volume, belong to player field.
Background technique
The existing broadcasting equipment of the public places such as subway, airport, harbour, when encounter site environment it is noisy when, can seem sound
Amount is insufficient and influences casting effect, and playback volume can only be turned up in order to improve, but the big volume broadcast of when scene becomes peace and quiet again allows people
Agitation, therefore a kind of can reduce in broadcast live peace and quiet is provided and improves volume automatically again when volume exports, scene is noisy
Volume adaptive identifying machine has important application value.
Summary of the invention
It is an object of the invention to provide a kind of volume adaptive identifying machine, to solve of the existing technology above-mentioned ask
Topic.
To achieve the above object, the technical solution used in the present invention is:
A kind of volume adaptive identifying machine, including audio signal source, electronic strobe switch, the balance electricity being once linked in sequence
Road, gain circuitry and power amplifier and loudspeaker, the audio signal source include at least a broadcast audio from program circuit
Signal source and a digital audio source, the audio signal source is after electronic strobe switch gates through balancing circuitry, increasing
Drive the speaker after the respective handling of beneficial circuit and power amplifier, wherein further include noise transducer, audio signal gain adjustment
Circuit, processor, display and input equipment, the audio signal gain adjusting circuit are arranged for real-time reception in broadcast live
Noise transducer data, and realized according to the data of noise transducer to the gain adjustment of gain circuitry, and then realize sound
Frequency signal gain plus-minus, reaches the power for adjusting power amplifier output volume；The distinct interface of the processor respectively with the electronics
The output end of gating switch is connected with the control terminal of the audio signal gain adjusting circuit, and with display and input equipment.
As a kind of preferred embodiment of the present invention, the gain circuitry uses M62429 chip；The audio
Signal gain adjusts circuit and uses CPLD digital circuit, and control signal output is connect with the controlled end of M62429 chip.
As a kind of preferred embodiment of the present invention, the processor completes man-machine interface, display, setting and system
Network communication function, simultaneous processor is the mute signal of the acquisition of the output end of the electronic strobe switch after A/D is converted
Real-time delivery gives CPLD digital circuit, to judge the state of broadcast.
As a kind of preferred embodiment of the present invention, it is also connected with grid communication module in the processor,
For realizing grid communication function.
As a kind of preferred embodiment of the present invention, the input equipment uses function key, including source of sound shift key,
Volume adjustment key and communication function selection key.
As a kind of preferred embodiment of the present invention, the audio signal gain adjustment electricity Lu Alto gain is according to difference
D determines following three kinds of regulative modes:
1) within the set range, gain remains unchanged difference D；
2) difference D positive value, gain increase, and increase power amplifier broadcast volume；
3) difference D negative value reduces gain, reduces power amplifier broadcast volume；
Wherein D=(B+S)-A, B in formula: in the gap that broadcast rests, noise transducer acquisition local environment background is made an uproar
Sound data, for assessing the noisy degree of site environment；A: when starting to detect that route starts to play broadcast power amplifier drive the speaker
Work, real-time collection site environment broadcasts volume decibel value to noise transducer again；S is that loudness increment is manually set.
The present invention solves the existing broadcasting equipment of the public places such as subway, airport, harbour, noisy when encountering site environment
When, the volume that can seem is insufficient and influences casting effect, playback volume can only be turned up in order to improve, but scene becomes quiet Shi great Yin again
Amount broadcast allows the problem of people's agitation；Using volume adaptive identifying machine of the invention, volume is forced down when quiet in scene, when noisy again
It is automatic to improve volume.
Detailed description of the invention
Fig. 1 is the circuit structure block diagram of the embodiment of the present invention.
Specific embodiment
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.It should be understood that described, examples are merely exemplary, does not constitute any restrictions to the scope of the present invention.This field
Technical staff should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and
Form is modified or is replaced, but these modifications or substitutions each fall within protection scope of the present invention.
Referring to Fig. 1, a kind of embodiment of volume adaptive identifying machine of the present invention, including the audio signal being once linked in sequence
Source, electronic strobe switch K, balancing circuitry, gain circuitry and digital power amplifier and loudspeaker Y, the audio signal source at least wrap
A broadcast voice signal source (program circuit) and a digital audio source (MP3 circuit) from program circuit are included, is come
From any one audio signal source through the corresponding of balancing circuitry, gain circuitry and power amplifier after electronic strobe switch gates
Drive the speaker after processing.Above section is routine techniques.It wherein, further include noise transducer C, audio signal gain adjustment electricity
Road (using CPLD digital circuit, i.e. CPLD chip), processor, LCD display and input equipment (at least one function button),
The data of the noise transducer of broadcast live are arranged in for real-time reception for the audio signal gain adjusting circuit, and according to noise
The data of sensor realize the gain adjustment to gain circuitry, and then realize audio signal gain plus-minus, reach and adjust power amplifier electricity
The power of road output volume；The distinct interface of the processor increases with the output end of the electronic strobe switch and the audio signal respectively
Benefit adjust circuit control terminal connection, and with display and input equipment.
At work, processor controls electronic strobe switch K selection MP3 (a kind of digital audio source) or wide to the present invention
Frequency source signal broadcast as input source of sound, in equipment mainboard, an input terminal of electronic strobe switch K is MP3 circuit integration
Outer welding system program circuit, T are program circuit matching transformers.M62429 chip is 2 tunnel independent digit adjustable potentiometers, control
Command signal is generated by CPLD chip, and CPLD exports the gain of one-way synchronization serial order control M62429 chip in -60dB -
Change between 0dB, controls the variation of the output volume size of digital power amplifier circuit.CPLD digital circuit real-time reception noise sensing
The data of device C (using JHM-NS02 noise decibel meter) detection, realize volume automatic gain control function.
Processor completes man-machine interface, display, setting and grid communication function, and simultaneous processor is line signal
(mute signal of the output end acquisition of electronic strobe switch K) gives CPLD digital circuit through A/D conversion real-time delivery, to judge
The state (being detailed in following content) of broadcast.
The gap that loudspeaker keep silent is rested in broadcast, and noise transducer C acquires local environment background noise data B, uses
To assess the noisy degree of site environment.When starting to detect that route starts to play broadcast power amplifier driving loudspeaker work, noise is sensed
The real-time broadcast of collection site environment volume decibel value A, S are that loudness increment is manually set to device again, and CPLD circuit is A and B+S number
Value, which compares, calculates difference D, is divided into 3 kinds of different adjustment:
1) within the set range, gain remains unchanged difference D；
2) difference D positive value, gain increase, and increase power amplifier broadcast volume；
3) difference D negative value reduces gain, reduces power amplifier broadcast volume.
The function of CPLD digital circuit of the invention can also be realized by the processor.
Claims (6)
1. a kind of volume adaptive identifying machine, including audio signal source, electronic strobe switch, the balance electricity being once linked in sequence
Road, gain circuitry and power amplifier and loudspeaker, the audio signal source include at least a broadcast audio from program circuit
Signal source and a digital audio source, the audio signal source is after electronic strobe switch gates through balancing circuitry, increasing
Drive the speaker after the respective handling of beneficial circuit and power amplifier, which is characterized in that further include noise transducer, audio signal increasing
Benefit adjusts circuit, processor, display and input equipment, which is arranged for real-time reception wide
The data of the noise transducer at scene are broadcast, and realize the gain adjustment to gain circuitry according to the data of noise transducer, in turn
It realizes audio signal gain plus-minus, reaches the power for adjusting power amplifier output volume；The distinct interface of the processor respectively with
The output end of the electronic strobe switch is connected with the control terminal of the audio signal gain adjusting circuit, and with display and input
Equipment.
2. volume adaptive identifying machine according to claim 1, which is characterized in that the gain circuitry uses M62429
Chip；The audio signal gain adjusting circuit uses CPLD digital circuit, control signal output and M62429 chip
Controlled end connection.
3. volume adaptive identifying machine according to claim 2, which is characterized in that the processor completes man-machine boundary
Face, display, setting and grid communication function, simultaneous processor are mute the acquisition of the output end of the electronic strobe switch
Signal real-time delivery after A/D is converted gives CPLD digital circuit, to judge the state of broadcast.
4. volume adaptive identifying machine according to claim 1, which is characterized in that be also connected in the processor and be
System network communication module, for realizing grid communication function.
5. volume adaptive identifying machine according to claim 1, which is characterized in that the input equipment uses function
Key, including source of sound shift key, volume adjustment key and communication function selection key.
6. according to volume adaptive identifying machine described in claim 1, which is characterized in that the audio signal gain adjusting circuit
Alto gain determines following three kinds of regulative modes according to difference D:
1) within the set range, gain remains unchanged difference D；
2) difference D positive value, gain increase, and increase power amplifier broadcast volume；
3) difference D negative value reduces gain, reduces power amplifier broadcast volume；
Wherein D=(B+S)-A, B in formula: in the gap that broadcast rests, noise transducer acquires local environment ambient noise number
According to for assessing the noisy degree of site environment；A: when starting to detect that route starts to play broadcast power amplifier drive the speaker work,
Real-time collection site environment broadcasts volume decibel value to noise transducer again；S is that loudness increment is manually set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425356.2A CN110072174B (en) | 2019-05-21 | 2019-05-21 | Volume self-adaptive player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425356.2A CN110072174B (en) | 2019-05-21 | 2019-05-21 | Volume self-adaptive player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110072174A true CN110072174A (en) | 2019-07-30 |
| CN110072174B CN110072174B (en) | 2021-01-29 |
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| CN201910425356.2A Active CN110072174B (en) | 2019-05-21 | 2019-05-21 | Volume self-adaptive player |
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Citations (15)
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| CN110072174B (en) | 2021-01-29 |
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