CN101355677A - Receiver capable of automatically regulating and controlling twisted-pair line transmission video signal - Google Patents
Receiver capable of automatically regulating and controlling twisted-pair line transmission video signal Download PDFInfo
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- CN101355677A CN101355677A CNA2008101425056A CN200810142505A CN101355677A CN 101355677 A CN101355677 A CN 101355677A CN A2008101425056 A CNA2008101425056 A CN A2008101425056A CN 200810142505 A CN200810142505 A CN 200810142505A CN 101355677 A CN101355677 A CN 101355677A
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Abstract
The invention discloses a receiver for automatically adjusting and controlling video signals transmitted by a twisted pair wire. The receiver comprises a balanced type input unit receiving balanced type video signals, a video signal amplifying unit making the amplifying processing of the balanced type video signals, an unit for the digitized processing of the balanced type video signals, a central processing unit which synchronously separates, analyzes and calculates the digitized signal data and then outputs the control signals, a high-frequency compensation unit for carrying out high-frequency compensation processing of the signals, a gain control unit for making the gain control processing of the signals and an output unit for outputting non-balanced type output video signals. The receiver has the advantages of being capable of automatically analyzing and calculating the outputted video signals, automatically adjusting and controlling the compensation mode and the compensation quantity of the signals, realizing the automatic setting of the twisted pair wire transmission video signal receiver, and improving the consistency of the output terminal signals in the multi-channle transmission.
Description
Technical field
The present invention relates to a kind of video signal receiver, refer to a kind of cable video transmission equipments such as imaging monitoring and building image intercommunication that are applied in especially, utilize twisted-pair line transmission video signal, and can adjust the receiver of control compensation video attenuation automatically.
Background technology
In the video signal transmission of longer distance, use twisted-pair line transmission video signal, have the advantage of easy construction, economy, also can reach longer Distance Transmission.Now increasing application scenario uses twisted-pair feeder as the transmission of video signals medium, and the transmission equipment of corresponding twisted-pair visual frequency signal is also used in a large number.
And the twisted-pair feeder that uses at present carries out the equipment of video signal transmission, is to adopt manual control mode to gain and the segmentation high frequency compensation decay that vision signal causes via long Distance Transmission.Concrete operations are by the operator different video signals to be carried out subjective observation, respectively the gain and the high frequency attenuation of vision signal are compensated manually again.
There is following shortcoming in compensation way with control manually:
1. in engineering construction, mounting condition and construction environment vary, and the debugging of manually adjusting is pretty troublesome, and workload is very big.And because the factor affecting of operator's each side, the twisted-pair feeder signal transmission apparatus differs and debugs surely in optimum state, particularly is difficult to be obtained by subjective observation and manual adjustments the image of consistent quality when the multiplexing centralized monitor;
2. do signal transmission more at a distance, and when adopting initiatively twisted-pair feeder sender unit, causing the output of receiver and the uniting and adjustment between the input very difficult.
Summary of the invention
The object of the present invention is to provide and a kind ofly the vision signal that receives is carried out digitisation handle, comprise sampling and algorithm etc., with the automatic adjustment control twisted-pair line transmission video signal receiver that the gain and the HFS of vision signal are done correct compensation.
For achieving the above object, the present invention adopts following functional structure:
The balanced type input unit of receiving balance formula vision signal;
The balanced type vision signal of input is carried out the vision signal amplifying unit of processing and amplifying;
The vision signal of amplifying is carried out digital translation and the calculating that performs an analysis, send out the CPU of control signal;
Be connected to the gain compensation unit of the signal of vision signal amplifying unit, receive the control signal that CPU is sent out, vision signal is carried out the gain compensation of signal and handle;
Be connected to the high frequency compensation unit of the signal of vision signal amplifying unit, receive the control signal that CPU is sent out, vision signal is carried out the high frequency compensation of signal and handle;
To be converted to the vision signal of unbalanced output and do the output unit that output impedance is mated through the balanced type incoming video signal after processing and amplifying and high frequency compensation and the gain controlling.
Above-mentioned CPU comprises making the AD conversion unit that digitisation is handled through the balanced type vision signal of processing and amplifying; Analog-to-digital vision signal is carried out the signal separation unit that horizontal/vertical synchronization signals is separated with burst signal; According to the analysis computing of certain Mathematical Modeling and algorithm, draw signal analysis arithmetic element to the compensation rate of the gain of vision signal and high frequency attenuation, and the output control unit of output control signal;
Above-mentioned AD conversion unit, vision signal separative element, signal analysis arithmetic element and output control unit all are integrated in the video integrated circuit (IC) chip of hyper tape microprocessor of customization.
The advantage of twisted-pair line transmission video signal receiver of the present invention is: can calculate the vision signal automatic analyser of output, intelligence is adjusted, the compensation way and the compensation rate of control signal, greatly reduce vision signal in the imaging monitoring at UTP (unshielded Twisted Pair, unshielded twisted pair) the adjustment workload in the low-cost line construction, guarantee the image quality after transmission, and in multiplexing, improved the consistency of outlet terminal signal.
Description of drawings
Fig. 1 is a structure calcspar of the present invention;
Fig. 2 is the wherein circuit theory diagrams of an embodiment of CPU of the present invention.
The primary clustering symbol description
A image capture unit B equilibrium conversion unit C video signal receiver
1 vision signal balanced type input unit
2 vision signal amplifying units, 3 CPU
31 AD conversion unit, 32 signal separation units
33 signal analysis arithmetic elements, 34 output control units
4 high frequency compensation unit, 5 gain control units
The high-speed video integrated circuit (IC) chip of 6 output units, 7 customizations
The S1 vision signal
S2 balanced type transmission video signal
S3 balanced type vision signal S4 numerical digit vision signal
S5 control signal S6 unbalanced outputting video signal TP twisted-pair feeder
Embodiment
Please refer to Fig. 1, represent structure calcspar of the present invention.In video signal receiver C of the present invention, comprise vision signal balanced type input unit 1, vision signal amplifying unit 2, CPU 3, high frequency compensation unit 4, gain control unit 5 and output unit 6.
Operating process of the present invention is:
By an image capture unit A pick-up image, with video conversion is vision signal S1, convert unbalanced vision signal S1 to balanced type transmission signals S2 by the equilibrium conversion unit B again, after transferring to vision signal balanced type input unit 1 among the video signal receiver C of the present invention via twisted-pair feeder TP, output balanced type vision signal S3.
And balanced type vision signal S3 carries out processing and amplifying via vision signal amplifying unit 2 earlier, the gain of this vision signal amplifying unit 2 can elect according to the length of twisted-pair feeder TP or control, with the loss of signal of compensation vision signal on the twisted-pair feeder of known length, the vision signal of amplifying reprocessing outputs to two output ports of output unit 6, and one of them output port outputting video signal is to display interface; Another output port outputting video signal is to CPU 3.
High frequency compensation unit 4 and gain control unit 5 are connected respectively to vision signal amplifying unit 2, after high frequency compensation unit 4 and gain control unit 5 receive control signal S5, according to control signal S5 and compensation balance formula incoming video signal S3 is used in start, reach the effect of automatic adjustment control.
At last, the balanced type incoming video signal is promptly exported the unbalanced outputting video signal S6 an of the best from output unit 6 after overcompensation and processing and amplifying.
Therefore, by above-mentioned structure, twisted-pair line transmission video signal receiver of the present invention can compensate the signal attenuation that vision signal is caused in the twisted-pair feeder transmission, more can improve the consistency of receiver output end signal in multiplexing.
Above-mentioned better embodiment only is used for illustrating the present invention; be not to be used for limiting protection scope of the present invention; any within the spirit and principles in the present invention scope, any modification of being done, equivalence replacement, improvement etc. all should be included within the scope of the present invention.
Claims (3)
1. adjust control twisted-pair line transmission video signal receiver automatically for one kind, it is characterized in that: comprising:
The balanced type input unit of receiving balance formula vision signal;
The balanced type vision signal of input is carried out the vision signal amplifying unit of processing and amplifying;
The vision signal of amplifying is carried out digital translation and the calculating that performs an analysis, send out the CPU of control signal;
Be connected to the gain compensation unit of the signal of vision signal amplifying unit, receive the control signal that CPU is sent out, vision signal is carried out the gain compensation of signal and handle;
Be connected to the high frequency compensation unit of the signal of vision signal amplifying unit, receive the control signal that CPU is sent out, vision signal is carried out the high frequency compensation of signal and handle;
To be converted to the vision signal of unbalanced output and do the output unit that output impedance is mated through the balanced type incoming video signal after processing and amplifying and high frequency compensation and the gain controlling.
2, a kind of automatic adjustment control twisted-pair line transmission video signal receiver as claimed in claim 1, it is characterized in that: above-mentioned CPU comprises making the AD conversion unit that digitisation is handled through the balanced type vision signal of processing and amplifying; Analog-to-digital vision signal is carried out the signal separation unit that horizontal/vertical synchronization signals is separated with burst signal; According to the analysis computing of Mathematical Modeling and algorithm, draw signal analysis arithmetic element to the compensation rate of the gain of vision signal and high frequency attenuation, and the output control unit of output control signal;
3, a kind of automatic adjustment control twisted-pair line transmission video signal receiver as claimed in claim 2, it is characterized in that: above-mentioned AD conversion unit, vision signal separative element, signal analysis arithmetic element and output control unit all are integrated in the video integrated circuit (IC) chip of hyper tape microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101425056A CN101355677A (en) | 2008-07-24 | 2008-07-24 | Receiver capable of automatically regulating and controlling twisted-pair line transmission video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101425056A CN101355677A (en) | 2008-07-24 | 2008-07-24 | Receiver capable of automatically regulating and controlling twisted-pair line transmission video signal |
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| Publication Number | Publication Date |
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| CN101355677A true CN101355677A (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101425056A Pending CN101355677A (en) | 2008-07-24 | 2008-07-24 | Receiver capable of automatically regulating and controlling twisted-pair line transmission video signal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808201A (en) * | 2009-02-12 | 2010-08-18 | 三菱电机株式会社 | Display unit |
| CN104519300A (en) * | 2014-11-25 | 2015-04-15 | 国网新疆电力公司电力科学研究院 | Dual HD (high-definition) digital signal reception integrated circuit |
-
2008
- 2008-07-24 CN CNA2008101425056A patent/CN101355677A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808201A (en) * | 2009-02-12 | 2010-08-18 | 三菱电机株式会社 | Display unit |
| CN101808201B (en) * | 2009-02-12 | 2012-11-21 | 三菱电机株式会社 | Display unit |
| CN104519300A (en) * | 2014-11-25 | 2015-04-15 | 国网新疆电力公司电力科学研究院 | Dual HD (high-definition) digital signal reception integrated circuit |
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Open date: 20090128 |