CN105515661B - A kind of digital voice communication system and method based on visible light communication technology - Google Patents
A kind of digital voice communication system and method based on visible light communication technology Download PDFInfo
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- CN105515661B CN105515661B CN201510891288.0A CN201510891288A CN105515661B CN 105515661 B CN105515661 B CN 105515661B CN 201510891288 A CN201510891288 A CN 201510891288A CN 105515661 B CN105515661 B CN 105515661B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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Abstract
The invention discloses a kind of digital voice communication system and method based on visible light communication technology, this method comprises: signal sending end: converting voice signals into analog voice electric signal, analog voice electric signal is converted to digital speech electric signal, and digital speech electric signal is converted to optical signal and sends；Signal forwards end: receiving optical signal and is converted to analog voice electric signal, analog voice electric signal is converted to digital speech electric signal, digital speech electric signal is converted to optical signal and is sent；Signal receiving end: it receives optical signal and is converted to analog voice electric signal, analog voice electric signal is converted into digital speech electric signal, digital speech electric signal is converted into analog voice electric signal, analog voice electric signal is converted into voice signal.The present invention transmits voice signal by visible light signal, reduces electromagnetic interference, avoids the harm to sensitive electronic equipment around, effectively reduces system cost and its complexity using LED illumination System.
Description
Technical field
The present invention relates to technical field of visible light communication, and in particular to a kind of digital speech based on visible light communication technology
Communication system and method.
Background technique
Visible light communication (Visible Light Communication, VLC) is grown up on White light LED technology
Novel wireless light communication technology, it is seen that optic communication have many advantages, such as strong security, without electromagnetic interference, without frequency spectrum authenticate,
Therefore there is huge application prospect in many fields.
In the noisy indoor environment such as computer room, since ambient noise is huge, people can not inside carry out normal language
Speech exchange, it is therefore desirable to the transmittance process of voice is completed using certain technology supplementary means.Under normal conditions, it can use
The modes such as the RF communication technology, Bluetooth Communication Technology or wifi communication technology convert voice signals into radio by microphone
Signal is transmitted, while being reduced to primary speech signal again in receiving end and be loaded into the earphone of receiving end, thus real
Existing speech exchange.
However, extremely sensitive to electromagnetic interference in certain environments, uncontrolled electromagnetic signal is easily to the electronics of surrounding
Equipment generates adverse effect, or even influences its normal work, therefore should avoid carrying out data communication using radio signal as far as possible
To reduce a possibility that it is endangered.
In view of this, being badly in need of providing a kind of voice communication method, the transmitting voice signal of no electromagnetic interference can be realized.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of voice communication methods, can be realized the language of no electromagnetic interference
Sound signal transmission.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that providing a kind of based on visible light communication skill
The digital voice communication system of art, comprising:
Signal sending end, including the first analog-digital converter, the first digital signal processor, driving circuit and LED light source lead to
It crosses microphone and converts voice signals into analog voice electric signal, analog voice electric signal is converted to number by the first analog-digital converter
Word voice telecommunication number, the first digital signal processor word voice telecommunication number carry out coded treatment, and driving circuit will be by compiling
The digital speech electric signal of code processing is modulated on LED light source, and it is concurrent that digital speech electric signal is converted to optical signal by LED light source
It sees off；
Signal forwards end, including photodetector array, analog-digital converter array, the second digital signal processor, driving
Gate array and LED light source array, photodetector array receive the optical signal that signal sending end issues, convert optical signals to
Analog voice electric signal, and analog-digital converter array, analog-to-digital conversion are sent by the biggish analog voice electric signal of signal strength
Analog voice electric signal is converted to digital speech electric signal, the second digital signal processor word voice telecommunication number by device array
Coded treatment is carried out, driving circuit array will be modulated on LED light source array by the digital speech electric signal of coded treatment,
Digital speech electric signal is converted to optical signal and is sent by way of broadcast by LED light source array；
Signal receiving end, including photodetector, the second analog-digital converter, third digital signal processor and digital-to-analogue conversion
Device, photodetector receive the optical signal that signal forwarding end issues, convert optical signals to analog voice electric signal, the second modulus
Analog voice electric signal is converted to digital speech electric signal, third digital signal processor word voice telecommunication number by converter
Coded treatment is carried out, digital speech electric signal is converted to analog voice electric signal, will simulate language by earphone by digital analog converter
Sound electric signal is converted to voice signal.
It in the above-mentioned technical solutions, further include ID setup module, to the analog voice telecommunications of microphone conversion
Number carry out ID setting, in the signal receiving end, if the digital speech that the third digital signal processor parses
The ID of electric signal is consistent with the ID that the signal receiving end stores, then is sent to the corresponding digital speech electric signal of the ID
The digital analog converter.
In the above-mentioned technical solutions, each of described photodetector array photodetector corresponds to the modulus and turns
Each of converter array analog-digital converter.
In the above-mentioned technical solutions, each of described driving circuit array driving circuit corresponds to the LED light source battle array
Each of column LED light source.
The Digital Speech Communication method based on visible light communication technology that the present invention also provides a kind of, comprising the following steps:
Signal sending end: converting voice signals into analog voice electric signal by microphone, then by analog voice electricity
Signal is converted to digital speech electric signal, is modulated on LED light source after carrying out coded treatment to digital voice telecommunication number, will be digital
Voice telecommunication number is converted to optical signal and sends；
Signal forwards end: receiving the optical signal that signal sending end issues, converts optical signals to analog voice electric signal, so
The biggish analog voice electric signal of signal strength is converted into digital speech electric signal afterwards, digital voice telecommunication number is encoded
It is modulated on LED light source array after processing, digital speech electric signal is converted into optical signal and is sent out by way of broadcast
It goes；
Signal receiving end: the optical signal that signal forwarding end issues is received, converts optical signals to analog voice electric signal, so
Analog voice electric signal is converted into digital speech electric signal afterwards, to digital voice telecommunication number carry out coded treatment after, then by its
Analog voice electric signal is converted to, analog voice electric signal is converted into voice signal finally by earphone.
In the above-mentioned technical solutions, ID setting is carried out to the analog voice electric signal of microphone conversion, in institute
Signal receiving end is stated, if the ID of the digital speech electric signal parsed is consistent with the ID that the signal receiving end stores,
The corresponding digital speech electric signal of the ID is then converted into the analog voice electric signal.
The present invention takes full advantage of the characteristics of visible light communication technology, and voice signal is passed by visible light signal
It is defeated, electromagnetic interference is reduced, the harm to sensitive electronic equipment around is efficiently avoided, realizes the language in noisy environment
Sound exchange, meanwhile, voice communication is realized using LED illumination System, significantly reduces system cost and its complexity.
Detailed description of the invention
Fig. 1 is that a kind of digital voice communication system structure based on visible light communication technology provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is a kind of Digital Speech Communication method flow based on visible light communication technology provided in an embodiment of the present invention
Figure.
Specific embodiment
The present invention provides a kind of digital voice communication system and method based on visible light communication technology, first according to can
The characteristics of light-exposed communication technology and Digital Speech Communication: (1) visible light communication is necessary for direct-view transmission, and centre cannot have barrier
It stops；(2) the single illumination intensity of the light source (LED light) of visible light communication and limited coverage area；(3) both may in voice communication
Be the communication of point-to-point be also likely to be the communication between multiple spot, and receive and dispatch in time be and meanwhile.Therefore, whole system need to be set
The signal forwarding structure based on visible light communication technology is calculated as to meet actual demand.Present embodiment sends language with terminal A
Sound signal, terminal B receives voice signal, and for terminal C forward signal, terminal A and terminal B have simultaneously sends and receives voice
The processing module of signal, therefore voice signal can also be sent with terminal B, terminal A is received between voice signal or other multiple spots
Communication is the same in principle, and can be carried out simultaneously in time, only carries out principle explanation with citing.
The present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification.
The embodiment of the invention provides a kind of digital voice communication systems based on visible light communication technology, as shown in Figure 1,
Include:
Signal sending end A, signal sending end A include microphone 101, the first analog-digital converter 102, at the first digital signal
Manage device 103, driving circuit 104 and LED light source 105, microphone 101 converts voice signals into analog voice electric signal, and first
Analog voice electric signal is converted to digital speech electric signal, the first 103 pairs of digital signal processor number by analog-digital converter 102
Voice telecommunication number carries out coded treatment, and driving circuit 104 will be modulated to LED light source by the digital speech electric signal of coded treatment
On 105, digital speech electric signal is converted to optical signal and sent by LED light source 105；
Signal forwards end C, including photodetector array 106, analog-digital converter array 107, the second Digital Signal Processing
Device 108, driving circuit array 109 and LED light source array 110, photodetector array 106 receive what signal sending end A was issued
Optical signal converts optical signals to analog voice electric signal, and sends mould for the biggish analog voice electric signal of signal strength
Analog voice electric signal is converted to digital speech electric signal, the second number by number converter array 107, analog-digital converter array 107
108 pairs of word signal processor digital voice telecommunications number carry out coded treatment, and driving circuit array 109 will be by the number of coded treatment
Word voice telecommunication number is modulated on LED light source array 110, and digital speech electric signal is converted to optical signal by LED light source array 110
And it is sent by way of broadcast；
Wherein, each of photodetector array 106 photodetector corresponds to every in analog-digital converter array 107
One analog-digital converter；Each of driving circuit array 109 driving circuit corresponds to each of LED light source array 110
LED light source.
Signal receiving end B, including photodetector 111, the second analog-digital converter 112, third digital signal processor
113, digital analog converter 114 and earphone 115, photodetector 111 receives the optical signal that signal forwarding end C is issued, by optical signal
Analog voice electric signal is converted to, analog voice electric signal is converted to digital speech electric signal by the second analog-digital converter 112, the
Three 113 pairs of digital signal processors number voice telecommunication number carries out coded treatment, and digital analog converter 114 is by digital speech electric signal
Analog voice electric signal is converted to, analog voice electric signal is converted to voice signal by earphone 115.
Above system is accomplished that the voice communication between multiple spot, alternatively, it is also possible to realize the communication of point-to-point, to Mike
The analog voice electric signal that wind 101 is converted carries out ID setting, in signal receiving end B, if third digital signal processor 113 parses
The ID of digital speech electric signal out is consistent with the ID that signal receiving end B is stored, then by the corresponding digital speech telecommunications of the ID
Number it is sent to digital analog converter 114.
Digital voice communication system based on visible light communication technology the specific implementation process is as follows:
Signal sending end A: information sends the voice signal that personnel issue and is converted to analog voice telecommunications by microphone 101
Number, then analog voice electric signal is sampled, quantified and encoded by the first analog-digital converter 102, it is made to be converted to number
Word voice telecommunication number, all digital speech electric signals carry out noise reduction process by the first digital signal processor 103, and treated
Digital speech electric signal, which is input in driving circuit 104, forms driving signal, and driving signal carries voice messaging, by driving signal
It is modulated on LED light source 105, the voice messaging that LED light source 105 is carried is sent by optical signal, is sent out to this signal
The work of sending end A is completed.
The characteristics of according to visible light communication direct-view transmission and single led lamp illumination limited coverage area, this programme is using letter
Number forwarding technological means, original illuminating light source is all substituted for can both illuminate can also take into account optical signal transmission
LED light source forms the array system of a big LED illumination, i.e. LED light source array 110, meanwhile, in order to enable from top to bottom
The optical signal sended over can be received in all angles, also be installed other than placing LED illumination System on the ceiling
Optical signal pick-up probe array, i.e. photodetector array 106, to guarantee all light to be come up by signal sending end A transmission
Signal can be received effectively.
Signal forwards end C: the optical signal that signal sending end A is sent is received, by being distributed in light all in communication range
Electric explorer array 106 converts optical signals to analog voice electric signal, and by the biggish analog voice electric signal of signal strength
It is sent to analog-digital converter array 107, then analog voice electric signal is sampled by analog-digital converter array 107, is measured
Change and encode, so that it is converted to digital speech electric signal, all digital speech electric signals are by the second digital signal processor 108
Noise reduction process is carried out, treated, and digital speech electric signal is input in driving circuit array 109 forms driving signal, driving letter
Number carry voice messaging, driving signal is modulated on LED light source array 110, the voice that LED light source array 110 is carried
Information is converted to optical signal and is sent by way of broadcast, and the work to this signal forwarding end C is completed.
Signal receiving end B: the carrying voice messaging that end C will be forwarded to send over by signal by photodetector 111
Optical signal is converted to analog voice electric signal, and analog voice electric signal is then converted to number by the second analog-digital converter 112
Word voice telecommunication number, 113 pairs of third digital signal processor digital voice telecommunications number carry out coded treatment, the digital speech telecommunications
Number analog voice electric signal is reduced to by digital analog converter 114, finally the analog voice electric signal directly drives 115 turns of earphone
It is changed to voice signal, realizes the transmission of voice signal, so far completes the voice messaging of signal sending end A to signal receiving end B
Transmitting-receiving process.
The Digital Speech Communication method based on visible light communication technology that the embodiment of the invention also provides a kind of, such as Fig. 2 institute
Show, comprising the following steps:
Step 101, signal sending end: analog voice electric signal is converted voice signals by microphone, then by mould
Quasi- voice telecommunication number is converted to digital speech electric signal, is modulated to LED light source after carrying out coded treatment to digital voice telecommunication number
On, digital speech electric signal is converted into optical signal and is sent；
Step 102, signal forward end: receiving the optical signal that signal sending end issues, convert optical signals to analog voice
Then the biggish analog voice electric signal of signal strength is converted to digital speech electric signal, to digital voice telecommunication by electric signal
Number carry out coded treatment after be modulated on LED light source array, by digital speech electric signal be converted to optical signal and by broadcast
Mode is sent；
Step 103, signal receiving end: the optical signal that signal forwarding end issues is received, analog voice is converted optical signals to
Then analog voice electric signal is converted to digital speech electric signal by electric signal, carry out coded treatment to digital voice telecommunication number
Afterwards, then it is converted into analog voice electric signal, analog voice electric signal is converted into voice signal finally by earphone.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the knots made under the inspiration of the present invention
Structure variation, the technical schemes that are same or similar to the present invention are fallen within the scope of protection of the present invention.
Claims (2)
1. a kind of digital voice communication system based on visible light communication technology characterized by comprising
Signal sending end, including the first analog-digital converter, the first digital signal processor, driving circuit and LED light source, pass through wheat
Gram wind converts voice signals into analog voice electric signal, and analog voice electric signal is converted to digital language by the first analog-digital converter
Sound electric signal, the first digital signal processor word voice telecommunication number carry out coded treatment, and driving circuit will be by coding
The digital speech electric signal of reason is modulated on LED light source, and digital speech electric signal is converted to optical signal and sent out by LED light source
It goes；
Signal forwards end, including photodetector array, analog-digital converter array, the second digital signal processor, driving circuit
Array and LED light source array, photodetector array receive the optical signal that signal sending end issues, convert optical signals to simulate
Voice telecommunication number, and analog-digital converter array, analog-digital converter battle array are sent by the biggish analog voice electric signal of signal strength
Analog voice electric signal is converted to digital speech electric signal by column, and the second digital signal processor word voice telecommunication number carries out
Coded treatment, driving circuit array will be modulated on LED light source array by the digital speech electric signal of coded treatment, LED light
Digital speech electric signal is converted to optical signal and is sent by way of broadcast by source array；
Signal receiving end, including photodetector, the second analog-digital converter, third digital signal processor and digital analog converter,
Photodetector receives the optical signal that signal forwarding end issues, and converts optical signals to analog voice electric signal, and the second modulus turns
Analog voice electric signal is converted to digital speech electric signal by parallel operation, third digital signal processor word voice telecommunication number into
Digital speech electric signal is converted to analog voice electric signal by row coded treatment, digital analog converter, by earphone by analog voice
Electric signal is converted to voice signal；
Further include ID setup module, ID setting is carried out to the analog voice electric signal of microphone conversion, in the letter
Number receiving end, if the ID for the digital speech electric signal that the third digital signal processor parses connects with the signal
The ID of receiving end storage is consistent, then the corresponding digital speech electric signal of the ID is sent to the digital analog converter；
Each of photodetector array photodetector corresponds to each of analog-digital converter array mould
Number converter；
Each of driving circuit array driving circuit corresponds to each of LED light source array LED light source.
2. a kind of Digital Speech Communication method based on visible light communication technology, which comprises the following steps:
Signal sending end: converting voice signals into analog voice electric signal by microphone, then by analog voice electric signal
Digital speech electric signal is converted to, is modulated on LED light source after carrying out coded treatment to digital voice telecommunication number, by digital speech
Electric signal is converted to optical signal and sends；
Signal forwards end: receiving the optical signal that signal sending end issues by photodetector array, converts optical signals to mould
Quasi- voice telecommunication number, is then converted to digital language for the biggish analog voice electric signal of signal strength by analog-digital converter array
Sound electric signal passes through driving circuit battle array after carrying out coded treatment by the second digital signal processor word voice telecommunication number
Column are modulated on LED light source array, then digital speech electric signal is converted to optical signal by LED light source array and passes through broadcast
Mode send；
Signal receiving end: the optical signal that signal forwarding end issues is received, analog voice electric signal is converted optical signals to, then will
Analog voice electric signal is converted to digital speech electric signal, after carrying out coded treatment to digital voice telecommunication number, then is converted
For analog voice electric signal, analog voice electric signal is converted into voice signal finally by earphone；
ID setting is carried out to the analog voice electric signal of microphone conversion, in the signal receiving end, if parsing
The ID of the digital speech electric signal come is consistent with the ID that the signal receiving end stores, then by the corresponding number of the ID
Voice telecommunication number is converted to the analog voice electric signal；
Each of photodetector array photodetector corresponds to each of analog-digital converter array mould
Number converter；
Each of driving circuit array driving circuit corresponds to each of LED light source array LED light source.
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| CN107813761A (en) * | 2017-09-27 | 2018-03-20 | 上海与德科技有限公司 | A kind of vehicle communication method, device, equipment and medium |
| CN108242188A (en) * | 2017-12-29 | 2018-07-03 | 佛山市幻云科技有限公司 | Examination system and method based on visible light communication |
| CN108599844B (en) * | 2018-01-25 | 2021-03-26 | 南昌大学 | Simultaneous interpretation device based on visible light communication technology and working method thereof |
| CN110048775A (en) * | 2019-05-21 | 2019-07-23 | 天津戎行华信科技有限公司 | The information transmission system in a kind of remote region based on visible light communication technology |
| CN112019273A (en) * | 2020-08-31 | 2020-12-01 | 尉氏县职业技术教育中心 | Two-way wireless audio transmission system based on white light LED |
| CN112653512B (en) * | 2020-12-23 | 2023-03-24 | 中国科学院半导体研究所 | Ultraviolet light communication device and method |
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