CN201869305U - Digital video recorder - Google Patents
Digital video recorder Download PDFInfo
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- CN201869305U CN201869305U CN2010206316062U CN201020631606U CN201869305U CN 201869305 U CN201869305 U CN 201869305U CN 2010206316062 U CN2010206316062 U CN 2010206316062U CN 201020631606 U CN201020631606 U CN 201020631606U CN 201869305 U CN201869305 U CN 201869305U
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Abstract
The utility model discloses a digital video recorder, which comprises a memory, differential demodulation modules and a first twisted pair interface, the differential demodulation modules are connected with the memory, and the first twisted pair interface is connected with the differential demodulation modules; the first twisted pair interface can be connected with at least one video camera through a twisted pair in order to receive the differentially processed video signals of the video camera; and the differential demodulation modules are used for demodulating and then transmitting the differentially processed video signals to the memory. Since the twisted pair is adopted to transmit video signals between the digital video recorder and the video camera, the transmission distance can be increased, the application range of a digital video camera system can be broadened, moreover, the material cost can be reduced, meanwhile, because the middle conversion links of the signal transmission path are reduced, the stability of transmission is enhanced, the quality of transmission is guaranteed, and phenomena, such as video distortion and delay, can be avoided or reduced.
Description
Technical field
The utility model relates to the video technique field, relates in particular to a kind of DVR.
Background technology
Hard disk camera system on the market generally includes DVR, display and one or more video camera, the general connected mode that adopts Fig. 1 or Fig. 2 between DVR and the video camera.Among Fig. 1, have a plurality of bnc connectors 101 in the DVR 10, each bnc connector 101 links to each other with a video camera 20 by a coaxial cable 50, (Composite Video Broadcast Signal: the composite video broadcast singal) video signal transmission of form is to DVR 10 for the CVBS that coaxial cable 50 obtains video camera 20, DVR 10 is stored after it is handled, and perhaps shows by display 30 video display devices such as grade.Fig. 2 has increased the technology that coaxial cable 50 is connected with twisted-pair feeder 60 conversions on the basis of connected mode shown in Figure 1, promptly in transmission path, increase twisted-pair feeder 60, vision signal from video camera 20 is at first transmitted by coaxial cable 50, then undertaken adopting twisted-pair feeder 60 transmission after the conversion of signals, adopt coaxial cable 50 to transfer to DVR 10 after the conversion of signals once more by transducer 70 more at last by transducer 70.Above dual mode is all or part of use coaxial cable 50 transmission video signals in transmission path, mode for Fig. 1, because the transmission range of coaxial cable 50 is generally in 500 meters, be difficult to satisfy transmission range application scenarios far away, therefore the scope of application is limited, and coaxial cable 50 prices are relatively expensive; Mode for Fig. 2, though adopted transmission range to reach 1200 meters twisted-pair feeder 60, can realize the distant signal transmission, and can reduce material cost, but adopt two transducers 70 to carry out conversion of signals, owing to increased intermediate link in transmission path, stability reduces, and may exert an influence to transmission of video signals speed, quality etc.
The utility model content
The main technical problems to be solved in the utility model is that a kind of DVR that increases the transmission of video signals distance, improves stability is provided.
For solving the problems of the technologies described above, the utility model provides a kind of DVR, comprises memory, also comprises the differential ference spiral module that is connected with described memory, and the first twisted-pair feeder interface that links to each other with described differential ference spiral module; The described first twisted-pair feeder interface is used for linking to each other with at least one video camera by twisted-pair feeder, thereby receives the vision signal of described video camera through difference processing; Described differential ference spiral module transfers to described memory after being used for described vision signal through difference processing carried out demodulation.
Further, also comprise signal output module, described signal output module links to each other with described differential ference spiral module, is used for the video signal transmission after the demodulation to video display devices.
Preferably, also be connected A/D modular converter, DSP module and D/A modular converter successively between described differential ference spiral module and the signal output module.
Further, described memory links to each other with described DSP module.
Preferably, described memory is the DDR memory.
Also comprise the fidelity processing module, described fidelity processing module links to each other with described DSP module.
Further, also comprise the connector that is used to connect coaxial cable, and the analog switch that is used for described connector of gating or differential ference spiral module, described memory also links to each other with described connector, described analog switch one end links to each other with described memory, and the other end links to each other with connector with described differential ference spiral module.
Preferably, also comprise the power supply that links to each other with the differential ference spiral module with the described first twisted-pair feeder interface, the described first twisted-pair feeder interface also is used for transmitting power supply signal by twisted-pair feeder to video camera.
Preferably, twisted-pair feeder is a CAT5E UTP cable.
Preferably, the described first twisted-pair feeder interface is RG45 interface or twisted pair end sub-interface.
The beneficial effects of the utility model are: twisted-pair feeder has characteristics such as long transmission distance, antijamming capability be strong, with low cost, therefore the utility model DVR adopts transmission video signal between twisted-pair feeder and the video camera, not only can increase transmission range, enlarge the scope of application of hard disk camera system, and can reduce material cost, simultaneously owing to reduced the intermediate conversion links of signal transmission path, improved the stability of transmission, can guarantee transmission quality, avoid or reduce phenomenons such as video distortion, time-delay.
The utility model DVR also can be powered to video camera by twisted-pair feeder, makes video camera not need to dispose independently power supply and just can work, and has therefore simplified device structure, and is easy to use, and expanded range of application.
Description of drawings
Fig. 1 is a kind of existing hard disk camera system structural representation;
Fig. 2 is another kind of existing hard disk camera system structural representation;
Fig. 3 is the hard disk camera system structural representation of first kind of embodiment of the utility model;
Fig. 4 is the circuit diagram of hard disk camera system shown in Figure 3;
Fig. 5 is the hard disk camera system structural representation of second kind of embodiment of the utility model;
Fig. 6 is a kind of circuit diagram of hard disk camera system of multiple access.
Embodiment
In conjunction with the accompanying drawings the utility model is described in further detail below by embodiment.
Please refer to Fig. 3, a kind of hard disk camera system of present embodiment comprises DVR 10, video display devices and at least one video camera 20, and video display devices can be display 30, computer etc. and is used for vision signal is carried out device shown.DVR 10 is connected with the video display devices signal, directly transfer to corresponding video display devices after can handling the vision signal of the CVBS form that obtains from video camera 20, export again after perhaps it being changed, transfer to display 30 after for example the CVBS conversion of signals being become the VGA form.Adopt twisted-pair feeder 60 to be connected between the DVR 10 of present embodiment and the video camera 20.
When present embodiment utilized twisted-pair feeder 50 transmission video signals, DVR 10 can adopt 4 first twisted-pair feeder interfaces to draw 4 twisted-pair feeders 60 respectively, and each twisted-pair feeder 60 connects a video camera 20.As shown in Figure 4, video camera 20 and DVR 10 both sides are carried out the difference processing and the differential ference spiral processing of vision signal respectively, thereby utilize the vision signal (abbreviation differential signal) of twisted-pair feeder 60 transmission video cameras 20 through difference processing.Be provided with the first twisted-pair feeder interface 11, differential ference spiral module 12, memory and the signal output module etc. that connect successively in the DVR 10.The first twisted-pair feeder interface 11 links to each other with one or more video camera 20 by twisted-pair feeder (preferred CAT5E UTP cable 90), thereby receive the differential signal of video camera 20 and transfer to differential ference spiral module 12, for example the first twisted-pair feeder interface 11 can be RJ45 interface or twisted pair end sub-interface; Differential ference spiral module 12 is used for the differential signal demodulation that the first twisted-pair feeder interface 11 receives being come out and transferring to signal output module, perhaps transfers to memory and preserves; Signal output module is used for the video signal transmission after the demodulation to video display devices is shown.Certainly in order to improve signal quality, also can between differential ference spiral module 12 and signal output module, be connected A/D modular converter 13, DSP module 14 and D/A modular converter 15 successively, the vision signal that is used for that demodulation is come out carries out exporting by signal output module after analog-to-digital conversion, signal processing and the digital-to-analogue conversion again, can significantly improve signal quality.The signal output module of present embodiment can be VGA modular converter 16, and link to each other with A/D modular converter 15, can be that the VGA form directly shows on display 30 with the CVBS conversion of signals of A/D modular converter 15 outputs, signal output module also can directly be imported other video display devices with the CVBS signal certainly.
Further, (Double Data Rate: Double Data Rate) memory 18 for the preferred DDR of memory in the DVR 10, also comprise HD (High Definition: fidelity is handled) module 19 in the DVR 10, DDR memory 18 all links to each other with DSP module 14 with HD module 19, be respectively applied for the signal after 14 processing of DSP module is stored, perhaps the signal in the DSP module 14 is carried out the high definition fidelity and handle, significantly improve the video display effect.
Each video camera 20 comprises pick-up lens 21, video sensor 22, difference processing module 26 and the second twisted-pair feeder interface 27 that connects successively, wherein, video sensor 22 can be ccd sensor, can utilize pick-up lens 21 to obtain vision signal, difference processing module 26 is used for the vision signal of video sensor 22 outputs is carried out difference processing and transferred to the second twisted-pair feeder interface 27, the second twisted-pair feeder interface 27 can be RJ45 interface or twisted pair end sub-interface, is used for the vision signal through difference processing is imported DVR 10 by twisted-pair feeder 60.Certainly in order to improve signal quality, also can between video sensor 22 and difference processing module 26, be connected A/D modular converter 23, DSP module 24 and D/A modular converter 25 successively, be used for the vision signal of video sensor 22 output is carried out after analog-to-digital conversion, signal processing and the digital-to-analogue conversion input difference processing module 26 again, can significantly improve signal quality.
Compare with coaxial cable 50, twisted-pair feeder 60 has characteristics such as long transmission distance, antijamming capability be strong, with low cost, therefore present embodiment adopts twisted-pair feeder 60 in the hard disk camera system behind the transmission video signal, not only can increase transmission range, enlarge the scope of application of hard disk camera system, and can reduce material cost, simultaneously owing to reduced the intermediate conversion links of signal transmission path, improved the stability of transmission, can guarantee transmission quality, avoid or reduce phenomenons such as video distortion, time-delay.
In the hard disk camera system of a kind of embodiment, DVR 10 only comprises one first twisted-pair feeder interface 11, and twisted-pair feeder 60 adopts category-5 cable or CAT5E UTP cable 90, and for example CAT5E UTP cable 90 comprises 4 pairs of twisted-pair feeders 60, and every pair of twisted-pair feeder 60 connects a video camera 20.Among the embodiment as shown in Figure 5, comprise a plurality of first twisted-pair feeder interfaces 11 in the DVR 10, each first twisted-pair feeder interface 11 connects a CAT5E UTP cable 90, and every CAT5E UTP cable 90 also connects a converting unit 80 by the RJ45 interface, this converting unit 80 makes 4 pairs of twisted-pair feeders 60 in the CAT5E UTP cable 90 connect a CAT5E UTP cable 60 respectively, each bar CAT5E UTP cable 90 connects a video camera 20 more respectively, makes the hard disk camera system have the multiple-camera access function.
Another kind as shown in Figure 6 has in the hard disk camera system of multiple access function, DVR 10 comprises one first twisted-pair feeder interface 11 and a plurality of differential ference spiral module 12, these differential ference spiral module 12 1 ends are connected on one the first twisted-pair feeder interface 11 jointly by twisted-pair feeder 60, and the other end links to each other with memory, signal output module etc.This first twisted-pair feeder interface 11 can link to each other with converting unit 80 by CAT5E UTP cable 90 or category-5 cable, and links to each other with a plurality of video cameras 20 by converting unit 80, thereby receives the vision signal of a plurality of video cameras 20 through difference processing; Each differential ference spiral module 12 receives the vision signal of No. one video camera 20 through difference processing by the first twisted-pair feeder interface 10, and transfers to memory or signal output apparatus after carrying out demodulation through the vision signal of difference processing.Quantity difference according to the video camera 20 that inserts, the quantity of differential ference spiral module 12 also can be provided with flexibly, for example in the present embodiment, differential ference spiral module 12 has 4, each difference adjustment module 12 is connected on the first shared twisted-pair feeder interface 11 by a pair of 2P twisted-pair feeder 60, and each differential ference spiral module 12 is connected with shared DSP module 14 by A/D modular converter 13 respectively, thereby vision signal is handled, DSP module 14, D/A modular converter 15 are connected successively with signal output module, and memory also links to each other with DSP module 14.Present embodiment can significantly improve processing speed after adopting 12 pairs of multi-channel video signals of a plurality of differential ference spiral modules to handle respectively, improves signal quality.
As depicted in figs. 1 and 2, in the existing hard disk camera system, each video camera 20 all utilizes independently power supply 40 to power, and for the user makes troubles, and video camera 20 can't be used at some be difficult to the directly special occasions of power supply.Therefore hard disk camera system of the present utility model also can adopt DVR 10 or converting unit 80 by 20 power supplies of 20 pairs of video cameras of twisted-pair feeder, making video camera 20 not need to dispose independently power supply just can work, therefore simplified device structure, easy to use, and expanded range of application.
Among the embodiment as shown in Figure 4, the power supply 40 that all links to each other with the first twisted-pair feeder interface 11, differential ference spiral module 12, signal output module also is set in the DVR 10, this power supply 40 can be electrically connected with battery or city, and the first twisted-pair feeder interface 11 can be powered to it to video camera 20 transmission power supply signals by twisted-pair feeder 60; Accordingly, video camera 20 also comprises power module 28, power module 28 all links to each other with video sensor 21, difference processing module 26 and the second twisted-pair feeder interface 27, be used for receiving power supply signal from twisted-pair feeder 60, and power supply signal transferred to video sensor 22 and difference processing module 26 it is powered by the second twisted-pair feeder interface 27.The power supply signal of twisted-pair feeder 40 transmission is a direct current signal, and after also can being connected DC/DC pressurizer 29 between the second twisted-pair feeder interface 27 and power module 28 and carrying out the voltage stabilizing processing, input power module 28 again.For example in the present embodiment, when adopting CAT5E UTP cable 90 to be connected between video camera 20 and the DVR 10, CAT5E UTP cable 90 comprises 4 pairs of twisted-pair feeders 60, the wherein a pair of transmission of video information that is used for, and other three pairs are divided into two groups and are used to transmit power supply signal.Adopt the effective propagation path of twisted-pair feeder 60 transmission power supply signals can reach 300 meters, can make video camera 20 have the convenience of web camera, and not need to use independently power supply power supply, can further meet consumers' demand.
Among the embodiment as shown in Figure 5 and Figure 6,40 pairs of power supplys are set in converting unit 80 to carry out video camera 20 and powers, particularly, one end of converting unit 80 has the RJ45 interface, this RJ45 interface is by the first twisted-pair feeder interface 11 of CAT5E UTP cable 90 connection DVR 10, thereby the other end connects a plurality of video cameras 20 respectively to each video camera 20 transmission power supply signal by many CAT5E UTP cable 90.In CAT5E UTP cable 90 that each video camera 20 links to each other, a pair of twisted-pair feeder 60 is used for transmission of video information, and other three pairs are divided into two groups and are used to transmit power supply signal and give power module 28, makes video camera 20 not need to use that independently the power supply power supply just can operate as normal.
Above content be in conjunction with concrete execution mode to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (10)
1. a DVR comprises memory, it is characterized in that, also comprises the differential ference spiral module that is connected with described memory, and the first twisted-pair feeder interface that links to each other with described differential ference spiral module; The described first twisted-pair feeder interface is used for linking to each other with at least one video camera by twisted-pair feeder, thereby receives the vision signal of described video camera through difference processing; Described differential ference spiral module transfers to described memory after being used for described vision signal through difference processing carried out demodulation.
2. DVR as claimed in claim 1 is characterized in that, also comprises signal output module, and described signal output module links to each other with described differential ference spiral module, is used for the video signal transmission after the demodulation to video display devices.
3. DVR as claimed in claim 2 is characterized in that, also is connected A/D modular converter, DSP module and D/A modular converter successively between described differential ference spiral module and the signal output module.
4. DVR as claimed in claim 3 is characterized in that, described memory links to each other with described DSP module.
5. DVR as claimed in claim 4 is characterized in that, described memory is the DDR memory.
6. DVR as claimed in claim 3 is characterized in that, also comprises the fidelity processing module, and described fidelity processing module links to each other with described DSP module.
7. as each described DVR in the claim 1 to 6, it is characterized in that also comprise the power supply that links to each other with the differential ference spiral module with the described first twisted-pair feeder interface, the described first twisted-pair feeder interface also is used for transmitting power supply signal by twisted-pair feeder to video camera.
8. as each described DVR in the claim 1 to 6, it is characterized in that, also comprise the connector that is used to connect coaxial cable, and the analog switch that is used for described connector of gating or differential ference spiral module, described memory also links to each other with described connector, described analog switch one end links to each other with described memory, and the other end links to each other with connector with described differential ference spiral module.
9. as each described DVR in the claim 1 to 6, it is characterized in that twisted-pair feeder is a CAT5E UTP cable.
10. as each described DVR in the claim 1 to 6, it is characterized in that the described first twisted-pair feeder interface is RG45 interface or twisted pair end sub-interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206316062U CN201869305U (en) | 2010-11-29 | 2010-11-29 | Digital video recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206316062U CN201869305U (en) | 2010-11-29 | 2010-11-29 | Digital video recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201869305U true CN201869305U (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206316062U Expired - Lifetime CN201869305U (en) | 2010-11-29 | 2010-11-29 | Digital video recorder |
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| Country | Link |
|---|---|
| CN (1) | CN201869305U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572603A (en) * | 2019-09-17 | 2019-12-13 | 浙江大华技术股份有限公司 | Hard disk video recorder |
-
2010
- 2010-11-29 CN CN2010206316062U patent/CN201869305U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572603A (en) * | 2019-09-17 | 2019-12-13 | 浙江大华技术股份有限公司 | Hard disk video recorder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518054 Nanshan District, Shenzhen Nanshan Avenue, new world, the third floor of the building Patentee after: Shenzhen pan sea Sanjiang electronic Limited by Share Ltd Address before: 518054 Nanshan District, Shenzhen Nanshan Avenue, new world, the third floor of the building Patentee before: Shenzhen Fanhai Sanjiang Electronics Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |