CN203435085U - Frame structure for long-distance and real-time transmission module of high-definition videos - Google Patents
Frame structure for long-distance and real-time transmission module of high-definition videos Download PDFInfo
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- CN203435085U CN203435085U CN201320454827.0U CN201320454827U CN203435085U CN 203435085 U CN203435085 U CN 203435085U CN 201320454827 U CN201320454827 U CN 201320454827U CN 203435085 U CN203435085 U CN 203435085U
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Abstract
The utility model provides a frame structure for long-distance and real-time transmission module of high-definition videos, and the structure enables the cost of real-time transmission to be low, the resolution to be high, the real-time performance to be great, and the transmission distance to be long. The structure comprises a signal-collecting front-end device, a central transmission channel, and a rear-end display device. The signal-collecting front-end device transmits a dynamic image signal to the rear-end display device in real time through the central transmission channel. The structure is characterized in the signal-collecting front-end device is specifically a 700-line CVBS camera; the rear-end display device is specifically a common liquid crystal display; the central transmission channel comprises a transmitting-end integrated circuit, an optical fiber, and a receiving-end integrated circuit; the transmitting-end integrated circuit is connected with one end of the optical fiber through an electric-optical conversion module; the other end of the optical fiber is connected to the electric-optical conversion module and then connected to the receiving-end integrated circuit; and the 700-line CVBS camera is correspondingly connected to an analog-digital conversion module inside the transmitting-end integrated circuit.
Description
Technical field
The utility model relates to dynamic image signal real-time Transmission field, is specially a kind of frame structure of HD video real-time remote transport module.
Background technology
Along with the development of electronic technology, the progress of means of communication, makes to meet people to over the horizon information, and particularly dynamic image information (as video monitoring, video interview etc.) demand becomes possibility.Coordinate in recent years the various remote dynamic image transmission method/equipment (transmission ends) of dissimilar camera (front end) and display device (rear end) to emerge in large numbers one after another.Particularly along with the appearance of some specialized large scale integrated circuits and popularizing of optical fiber transmission technique, make the long-distance transmissions mode of economic convenient and simple and reliable dynamic image information become possibility, this will accelerate the universal of remote dynamic image transmission application greatly, thereby the daily life being greatly convenient for people to, builds more the harmonious society of safety simultaneously economic, Means of Ensuring is easily provided.
By the relatively discovery to current several typical dynamic image signal transmission forms, IP transmission means/equipment based on local area network (LAN) exists because signal adopts packet switching in network and brings the problem of dynamic image transmission real-time poor (time delay), and the peak period that this time delay is used at network can be more severe, this has limited greatly this transmission means and has been applied in the high occasion of transmission requirement of real-time, such as road monitoring, safety guarantee monitoring etc.SDI transmission means/equipment based on SDI coded system, except SDI camera and display device price high (being several times as much as the required same category of device of other transmission meanss), because its transmitted data amount is huge, its to signal bandwidth require high, cause the required input of its transmission channel and transmission equipment also significantly to increase with respect to other transmission means, the occasion that particularly need store information at receiving terminal, also will increase than other modes more for purchasing the input of memory device.Another kind of transmission means is that the dynamic image signal camera of a CVBS type being produced by coaxial cable transfers to distal displayed equipment, although which simple economy and real-time are better, but the reason due to coaxial cable decay, the transmission range upper limit of this kind of mode is generally tens meters, otherwise the shown quality of image out of receiving terminal can obviously decline.
Summary of the invention
For existing above-mentioned defect, the utility model provides a kind of frame structure of HD video real-time remote transport module, and it makes the cost of real-time Transmission low, resolution is high, real-time, long transmission distance.
A kind of frame structure of HD video real-time remote transport module, its technical scheme is such: it comprises signals collecting headend equipment, intermediate conveyor passage, rear end display device, described signals collecting headend equipment by intermediate conveyor passage by dynamic image signal real-time Transmission to described rear end display device, it is characterized in that: described signals collecting headend equipment is specially 700 line CVBS cameras, described rear end display device is specially common liquid crystals display, described intermediate conveyor passage comprises transmitting terminal integrated circuit, optical fiber, receiving terminal integrated circuit, described transmitting terminal integrated circuit connects one end of described optical fiber by electrooptic conversion module, after the other end access photoelectric conversion module of described optical fiber, pass into described receiving terminal integrated circuit, analog-to-digital conversion module in the described transmitting terminal integrated circuit of the corresponding access of described 700 line CVBS cameras.
It is further characterized in that: described rear end display device can be also CRT monitor;
On described transmitting terminal integrated circuit, be provided with transmitting terminal single-chip, described transmitting terminal single-chip inside specifically comprises analog-to-digital conversion module, composite module, scrambler module, parallel serial conversion module, described analog-to-digital conversion module has one at least, the corresponding input that connects described composite module of output of the analog-to-digital conversion module described in each, the output of described composite module connects described parallel serial conversion module after connecting described scrambler module, and 700 line CVBS cameras described in each connect the input of corresponding described analog-to-digital conversion module;
On the circuit of described receiving terminal, be provided with receiving terminal single-chip, described receiving terminal single-chip inside specifically comprises string modular converter, descrambling code module, separate composite module, D/A converter module, described D/A converter module has one at least, the output of described string modular converter connects the input of described descrambling code module, the output of described descrambling code module connects the input of described solution composite module, the output of described solution composite module is corresponding connects the input of D/A converter module described in each, the output of described D/A converter module connects respectively corresponding monitor,
On described transmitting terminal integrated circuit, also can arrange and comprise the multi-chip circuit that analog-to-digital conversion module chip, composite module and scrambler module combined chip, parallel serial conversion module chip portfolio form;
On the circuit of described receiving terminal, also can arrange and comprise the string multi-chip circuit that also modular converter chip, descrambling code module reconciliation composite module combined chip, D/A converter module chip portfolio form.
Adopt after the utility model, it selects 700 cheap and common line CVBS cameras as signals collecting headend equipment, select common liquid crystals display as rear end display device, and by optical fiber by transmitting terminal integrated circuit, receiving terminal integrated circuit is connected, it can realize high definition dynamic image signal real-time Transmission with extremely low cost, its unrepeatered transmission distance can reach more than 20 kilometers, image time delay is less than 100 microseconds, resolution can meet under multiple illumination conditions 50 meters of discriminations with interior registration number, it makes the cost of real-time Transmission low, resolution is high, real-time, long transmission distance.
Accompanying drawing explanation
Fig. 1 is 8 road HD video real-time remote signal transmission module frame structural representations.
Embodiment
A kind of frame structure of HD video real-time remote transport module, it comprises signals collecting headend equipment, intermediate conveyor passage, rear end display device, signals collecting headend equipment by intermediate conveyor passage by dynamic image signal real-time Transmission to rear end display device, signals collecting headend equipment is specially 700 line CVBS cameras, rear end display device is specially common liquid crystals display/or CRT monitor, intermediate conveyor passage comprises transmitting terminal integrated circuit, optical fiber, receiving terminal integrated circuit, transmitting terminal integrated circuit connects one end of optical fiber by electrooptic conversion module, after the other end access photoelectric conversion module of optical fiber, pass into receiving terminal integrated circuit, analog-to-digital conversion module in the corresponding access of 700 line CVBS cameras transmitting terminal integrated circuit.On transmitting terminal integrated circuit, be provided with transmitting terminal single-chip, transmitting terminal single-chip inside specifically comprises analog-to-digital conversion module, composite module, scrambler module, parallel serial conversion module, analog-to-digital conversion module has one at least, the corresponding input that connects composite module of output of the analog-to-digital conversion module of each, the output of composite module connects parallel serial conversion module after connecting scrambler module, and the 700 line CVBS cameras of each connect the input of corresponding analog-to-digital conversion module; On the circuit of receiving terminal, be provided with receiving terminal single-chip, receiving terminal single-chip inside specifically comprises string modular converter, descrambling code module, separates composite module, D/A converter module, D/A converter module has one at least, the output of string modular converter connects the input of descrambling code module, the output of descrambling code module connects the input of separating composite module, separate the corresponding input that connects each D/A converter module of output of composite module, the output of D/A converter module connects respectively corresponding common liquid crystals display/or CRT monitor.
Wherein, on transmitting terminal integrated circuit, also can arrange and comprise the multi-chip circuit that analog-to-digital conversion module chip, composite module and scrambler module combined chip, parallel serial conversion module chip portfolio form;
On the circuit of receiving terminal, also can arrange and comprise the string multi-chip circuit that also modular converter chip, descrambling code module reconciliation composite module combined chip, D/A converter module chip portfolio form.
See Fig. 1, the 8 passage 700 line dynamic image transmission plans of take are example, the 8 road dynamic images that this transmission plan can gather 8 700 line cameras simultaneously transfer to the B point of far-end from A point, on the transmitting terminal integrated circuit in intermediate conveyor passage, be wherein on the circuit of transmitting terminal single-chip, receiving terminal, to be receiving terminal single-chip.
Each frame valid pixel of the signal that 700 line CVBS cameras gather is:
976 (H) x, 582 (V), frame rate was 25 frame/seconds.
In hop, first the dynamic image signal from 700 line CVBS cameras is carried out to analog-to-digital conversion, by the amount of information that can be calculated its each second of required transmission, is:
976 X 582 X 25=14,200,800 Byte(bytes)
From above-mentioned calculating, required analog-to-digital conversion speed (sampling rate) is about 14.2M/S, for each road, access the switching rate of the analog-to-digital conversion module of signal and set 15M/S, this value is greater than above-mentioned calculated value, and this sampling rate can guarantee compatible 700 lines of the utility model and the following all CVBS cameras of 700 lines.
After analog-to-digital conversion module immediately be complex function module, the parallel digital signal that is 15M Byte/S by 8 speed after 8 tunnel analog-to-digital conversion in this module is combined into the parallel digital signal that a road speed is 8 X 15=120M Byte/S speed.For making signal be applicable to the requirement of Optical Fiber Transmission, need wherein ' 1 ' quantity be equated substantially with ' 0 ' quantity by the parallel signal code stream after compound according to special algorithm adjustment, this link is referred to as scrambler.Pass through the signal of scrambler and then converted to single serial code stream by follow-up parallel serial conversion module.Requirement about the conversion speed of parallel serial conversion module is calculated as follows:
120M?/S?X?8?bit=960M?Byte?/S
Consider the redundancy overhead such as packet header, bag tail and verification, in actual design, the switching rate of this module is advisable to be not less than 1000M Byte/S.
Now complete the processing to transmitting terminal dynamic image signal, this signal can convert to after light signal by optical fiber transmission to receiving terminal via optical module, adopts current prevailing photoelectric conversion module and optical fiber, and this kind of transmission means can non-relay transmission more than 20Km.
At receiving terminal, by the complete reverse enforcement of said process one time, to first the light signal from optical fiber being carried out to opto-electronic conversion, go here and there successively thereafter and conversion, descrambling code, solution are compound, digital-to-analogue conversion, finally be recovered to simulation CVBS signal, this signal can directly access display and watch.
The processing to signal of transmitting terminal in foregoing description and receiving terminal, can in transmitting terminal single-chip, receiving terminal single-chip, complete respectively, because each link in implementation process is all taken universal and the most most economical in the market equipment and material, therefore this scheme possesses advantage with low cost.In addition the utility model can transmit and be up to the signal that 700 line high-definition cameras gather, in addition respectively by nearly all Electric signal processing link in transmitting terminal and receiving terminal respectively by completing in transmitting terminal single-chip and receiving terminal single-chip, guaranteed to greatest extent the integrality of signal and reduced the time delay in signals transmission, its unrepeatered transmission distance can reach more than 20 kilometers, image time delay is less than 100 microseconds, resolution can meet under multiple illumination conditions 50 meters of discriminations with interior registration number, it makes the cost of real-time Transmission low, resolution is high, real-time, long transmission distance.
Claims (6)
1. the frame structure of a HD video real-time remote transport module, it comprises signals collecting headend equipment, intermediate conveyor passage, rear end display device, described signals collecting headend equipment by intermediate conveyor passage by dynamic image signal real-time Transmission to described rear end display device, it is characterized in that: described signals collecting headend equipment is specially 700 line CVBS cameras, described rear end display device is specially common liquid crystals display, described intermediate conveyor passage comprises transmitting terminal integrated circuit, optical fiber, receiving terminal integrated circuit, described transmitting terminal integrated circuit connects one end of described optical fiber by electrooptic conversion module, after the other end access photoelectric conversion module of described optical fiber, pass into described receiving terminal integrated circuit, analog-to-digital conversion module in the described transmitting terminal integrated circuit of the corresponding access of described 700 line CVBS cameras.
2. the frame structure of a kind of HD video real-time remote transport module according to claim 1, is characterized in that: described rear end display device can be also CRT monitor.
3. the frame structure of a kind of HD video real-time remote transport module according to claim 1 and 2, it is characterized in that: on described transmitting terminal integrated circuit, be provided with transmitting terminal single-chip, described transmitting terminal single-chip inside specifically comprises analog-to-digital conversion module, composite module, scrambler module, parallel serial conversion module, described analog-to-digital conversion module has one at least, the corresponding input that connects described composite module of output of the analog-to-digital conversion module described in each, the output of described composite module connects described parallel serial conversion module after connecting described scrambler module, 700 line CVBS cameras described in each connect the input of corresponding described analog-to-digital conversion module.
4. the frame structure of a kind of HD video real-time remote transport module according to claim 1 and 2, it is characterized in that: on the circuit of described receiving terminal, be provided with receiving terminal single-chip, described receiving terminal single-chip inside specifically comprises string modular converter, descrambling code module, separate composite module, D/A converter module, described D/A converter module has one at least, the output of described string modular converter connects the input of described descrambling code module, the output of described descrambling code module connects the input of described solution composite module, the output of described solution composite module is corresponding connects the input of D/A converter module described in each, the output of described D/A converter module connects respectively corresponding monitor.
5. the frame structure of a kind of HD video real-time remote transport module according to claim 1 and 2, is characterized in that: on described transmitting terminal integrated circuit, also can arrange and comprise the multi-chip circuit that analog-to-digital conversion module chip, composite module and scrambler module combined chip, parallel serial conversion module chip portfolio form.
6. the frame structure of a kind of HD video real-time remote transport module according to claim 1 and 2, is characterized in that: on the circuit of described receiving terminal, also can arrange and comprise the string multi-chip circuit that also modular converter chip, descrambling code module reconciliation composite module combined chip, D/A converter module chip portfolio form.
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| CN201320454827.0U CN203435085U (en) | 2013-07-29 | 2013-07-29 | Frame structure for long-distance and real-time transmission module of high-definition videos |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414876A (en) * | 2013-07-29 | 2013-11-27 | 无锡思泰迪半导体有限公司 | Frame structure of high-definition video real-time remote transmission module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414876A (en) * | 2013-07-29 | 2013-11-27 | 无锡思泰迪半导体有限公司 | Frame structure of high-definition video real-time remote transmission module |
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Effective date of registration: 20230118 Address after: No. 295, Building 17, No. 2723, Fuchunwan Avenue, Chunjiang Street, Fuyang District, Hangzhou, Zhejiang, 310000 Patentee after: Hangzhou Sitai Microelectronics Co.,Ltd. Address before: No. 16, Changjiang Road, New District, Wuxi City, Jiangsu Province, 214028 Patentee before: STEADICHIPS Inc. |
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Granted publication date: 20140212 |