CN203261425U - Underwater digital video transmission device based on LED - Google Patents
Underwater digital video transmission device based on LED Download PDFInfo
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- CN203261425U CN203261425U CN 201220685770 CN201220685770U CN203261425U CN 203261425 U CN203261425 U CN 203261425U CN 201220685770 CN201220685770 CN 201220685770 CN 201220685770 U CN201220685770 U CN 201220685770U CN 203261425 U CN203261425 U CN 203261425U
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- led
- amplifier
- underwater
- transmission device
- video transmission
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Abstract
The utility model discloses an underwater digital video transmission device based on an LED, and belongs to the technical field of wireless communication. The underwater digital video transmission device comprises a sending module and a receiving module packaged in a housing. The sending module comprises a composite video broadcast signal generator, a source encoder, a channel encoder, and a transmitting end connected in sequence. The transmitting end comprises an amplifier, a bias device, and a blue light or green light LED. An input end of the amplifier is connected with an output end of the channel encoder, and an output end of the amplifier is connected with a first input end of the bias device. A second input end of the bias device is connected with DC component, and an output end of the bias device is connected with an anode of the LED. A cathode of the LED is connected with ground. The receiving module comprises a receiving end, a channel decoder, a source decoder, and a composite video broadcast signal video display device connected in sequence. The underwater digital video transmission device has good transmission performance underwater, and prevents defects that a high-power laser source is large in volume, high in cost, and high in power consumption and does not suitable for underwater communication.
Description
Technical field
The utility model discloses LED-based underwater digit video transmission device, belong to the technical field of radio communication.
Background technology
CVBS(Composite Video Broadcast Signal, the composite video broadcast singal) mass data that produces has proposed the requirement that do not gear to actual circumstances to memory capacity, transmission bandwidth, disposal ability and frequency spectrum resource utilization rate, makes digitlization be difficult to realize.For this reason, adopt compression coding technology, those are abandoned human eye vision image and the not too important thing of human auditory system sound, thereby reduced storage, transmission and the data volume of processing have improved frequency spectrum resource utilization rate.
The propagation distance of electromagnetic wave in water is very limited, only has visible luminous energy at the hundreds of rice of water transmission.1963, the people such as Dimtley are when the propagation characteristic of research light wave in the ocean, the decay of finding seawater other optical bands of attenuation ratio of blue green light in the 450-550 nano waveband is much smaller, at present, submarine optical communication mainly utilizes bluish-green laser to communicate, but the high power laser sources volume is large, and cost is high, power consumption is large, is not suitable for the practical application of subsurface communication.
The utility model content
Technical problem to be solved in the utility model is the deficiency for the above-mentioned background technology, and LED-based underwater digit video transmission device is provided.
The utility model is for realizing that above-mentioned utility model purpose adopts following technical scheme:
LED-based underwater digit video transmission device comprises the sending module and the receiver module that are encapsulated in the housing,
Described sending module comprises composite video broadcast singal generator, source encoder, channel encoder, the transmitting terminal that connects successively; Described transmitting terminal comprises amplifier, biasing device, blue light or green light LED, and wherein: described amplifier in connects the channel encoder output, and amplifier out connects the first input end of biasing device; The second input termination DC component of described biasing device, biasing device output termination LED anode; Described LED minus earth;
Described receiver module comprises receiving terminal, channel decoder, source decoder, the composite video broadcast singal video display apparatus that connects successively.
The utility model adopts technique scheme, and have following beneficial effect: the underwater digit video transmission device based on blue light or green light LED device described in the utility model has good transmission performance under water; Avoided the high power laser sources volume large, cost is high, and power consumption is large, is not suitable for the defective of subsurface communication.
Description of drawings
Fig. 1 is the schematic diagram of LED-based underwater digit video transmission device.
Fig. 2 is the designed survey map based on the optical power attenuation when the water transmission of white light LEDs and blue-ray LED in the underwater digit Video transmission system of blue-ray LED of the utility model.
Fig. 3 be the utility model designed propagate in water and in the air based on blue-ray LED in the underwater digit Video transmission system of blue-ray LED the time optical power attenuation survey map.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to utility model:
LED-based underwater digit video transmission device as shown in Figure 1 comprises the sending module and the receiver module that are encapsulated in the housing, the composite video broadcast singal generator, source encoder, channel encoder, the transmitting terminal that connect successively; Described receiver module comprises receiving terminal, channel decoder, source decoder, the composite video broadcast singal video display apparatus that connects successively.Transmitting terminal comprises amplifier, biasing device, LED, and amplifier in connects the channel encoder output, the first input end of output termination biasing device; The second input termination DC component of biasing device, output termination LED anode; The LED minus earth.The LED device is blue-ray LED or green light LED.
Source encoder and source decoder all adopt the MPEG-2 coded system, and channel encoder and channel decoder all adopt the HDB3 coded system.
Adopt the source encoder of MPEG-2 coded system to the CVBS coding that the CVBS generator sends, vision signal is carried out real-time digital compress processing, output two-pass DINSAR digital signal; Adopt the channel encoder of HDB3 coded system that source encoder output two paths of data stream is merged, obtain one the tunnel and in channel, be transferred to data flow; Amplifier is banished a large rear input variable as the biasing device to a circuit-switched data of channel encoder output; The biasing device is according to the output of amplifier and the driving voltage of DC component output LED; Light-sensitive device in the receiving terminal is converted to the signal of telecommunication with the light signal that LED sends, the signal of telecommunication of light-sensitive device output is through being amplified into channel decoder, the channel decoder of employing HDB3 coded system is divided into two data flow with the output signal of amplifier, adopt the source decoder of MPEG-2 coded system to the two-pass DINSAR digital signal decompression, reduction obtains CVBS.
Adopt the blue-ray LED device to consist of underwater digit video transmission device described in the utility model, compare with the underwater digit video transmission device that white light LED part consists of: white light LEDs and blue-ray LED are at the optical power attenuation survey map of water transmission as shown in Figure 2; The optical power attenuation survey map that blue light is propagated in water and in the air as shown in Figure 3.As seen based on the underwater digit video transmission device of blue-ray LED under water transmission performance be better than underwater video digital video transmission device based on white light LEDs.Adopting the green light LED device to consist of underwater digit video transmission device described in the utility model and employing blue-ray LED device, to consist of underwater digit video transmission principle of device described in the utility model identical, its in water or airborne optical power attenuation all little than white light.
In sum, the underwater digit video transmission device based on blue light or green light LED device described in the utility model has good transmission performance under water; Avoided the high power laser sources volume large, cost is high, and power consumption is large, is not suitable for the defective of subsurface communication.
Claims (1)
1. LED-based underwater digit video transmission device comprises the sending module and the receiver module that are encapsulated in the housing, it is characterized in that:
Described sending module comprises composite video broadcast singal generator, source encoder, channel encoder, the transmitting terminal that connects successively, described transmitting terminal comprises amplifier, biasing device, blue light or green light LED, wherein: described amplifier in connects the channel encoder output, amplifier out connects the first input end of biasing device, the second input termination DC component of described biasing device, the described LED anode of biasing device output termination, described LED minus earth;
Described receiver module comprises receiving terminal, channel decoder, source decoder, the composite video broadcast singal video display apparatus that connects successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685770 CN203261425U (en) | 2012-12-13 | 2012-12-13 | Underwater digital video transmission device based on LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685770 CN203261425U (en) | 2012-12-13 | 2012-12-13 | Underwater digital video transmission device based on LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203261425U true CN203261425U (en) | 2013-10-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220685770 Expired - Lifetime CN203261425U (en) | 2012-12-13 | 2012-12-13 | Underwater digital video transmission device based on LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203261425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
-
2012
- 2012-12-13 CN CN 201220685770 patent/CN203261425U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515680A (en) * | 2016-01-08 | 2016-04-20 | 暨南大学 | Underwater IOT (Internet Of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes) |
| CN105515680B (en) * | 2016-01-08 | 2018-07-31 | 暨南大学 | Underwater Internet of things system based on blue-ray LED visible light communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: 2016320000211 Denomination of utility model: Underwater digital video transmission device based on LED Granted publication date: 20131030 License type: Common License Record date: 20161114 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: 2016320000211 Date of cancellation: 20180116 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |