CN201869310U - Self-adaptively connected digital video recorder - Google Patents
Self-adaptively connected digital video recorder Download PDFInfo
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- CN201869310U CN201869310U CN2010206315746U CN201020631574U CN201869310U CN 201869310 U CN201869310 U CN 201869310U CN 2010206315746 U CN2010206315746 U CN 2010206315746U CN 201020631574 U CN201020631574 U CN 201020631574U CN 201869310 U CN201869310 U CN 201869310U
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Abstract
The utility model discloses a self-adaptively connected digital video recorder, which comprises a memory, a connector, a differential demodulation module and a first twisted pair interface, the connector can be connected with a coaxial cable, the memory is connected with the connector, the differential demodulation module is connected with the memory, and the first twisted pair interface is connected with the differential demodulation module; 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 module is used for demodulating and then transmitting the differentially processed video signals to the memory. The digital video recorder can compatibly use the coaxial connector or the twisted pair to connect with the video camera, and can correspondingly process video signals connected in different ways, so the digital video recorder is more flexible to use, can meet various requirements of users and is more convenient and practical.
Description
Technical field
The utility model relates to the video technique field, relates in particular to the DVR that a kind of self adaptation inserts.
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 occupation mode DVR that self adaptation flexible, that satisfy all kinds of demands of user inserts is provided.
For solving the problems of the technologies described above, the DVR that the utility model provides a kind of self adaptation to insert, comprise memory and the connector that is used to be connected coaxial cable, described memory links to each other with described connector, also comprise 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 the analog switch that is used for described connector of gating or differential ference spiral module, 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 first signal picker, secondary signal collector and the CPU that links to each other with described analog switch, described first signal picker is connected between described first twisted-pair feeder interface and the CPU, and described secondary signal collector links to each other with described connector, CPU and analog switch.
Preferably, also be connected the first gain amplifying unit between described differential ference spiral module and the described analog switch.
Also be connected the second gain amplifying unit between described secondary signal collector and the described analog switch.
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 providing power supply signal by twisted-pair feeder to video camera.
Further, also comprise signal output module, described signal output module links to each other with described analog switch, is used for the vision signal after the demodulation of described differential ference spiral module or will be from the video signal transmission of described connector to video display devices.
Preferably, also be connected A/D modular converter, DSP module and D/A modular converter successively between described analog switch and the signal output module, described memory links to each other with described DSP module.
For example, described memory is the DDR memory.
Preferably, also comprise the fidelity processing module, described fidelity processing module links to each other with described DSP module.
The beneficial effects of the utility model are: the DVR that the utility model self adaptation inserts can compatiblely use coaxial connector or twisted-pair feeder to be connected with video camera, and the vision signal at different connected modes handled accordingly, therefore occupation mode more flexibly, can satisfy all kinds of demands of user, more convenient and practical.
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 hard disk camera system structural representation of second kind of embodiment of the utility model;
Fig. 5 is the circuit diagram of hard disk camera system shown in Figure 4;
Fig. 6 is the circuit diagram of the hard disk camera system of the another kind of embodiment of the utility model.
Specific embodiment
In conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Please refer to Fig. 3 to shown in Figure 5, 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 a part of video camera 20, be connected with other video cameras 20 employing coaxial cables 50.
For example the DVR among Fig. 3 10 connects 4 video cameras 20 respectively by 4 twisted-pair feeders 60, also connects a video camera 20 by a coaxial cable 50; DVR 10 among Fig. 4 connects converting unit 80 by 1 twisted-pair feeder 60, and converting unit 80 connects 4 video cameras 20 again, and DVR 10 also connects a video camera 20 by a coaxial cable 50.The occupation mode of these DVR 10 is very flexible, can be convenient to the user and select different interface and connected mode according to concrete needs, further brings convenience for the user.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.
The DVR 10 of present embodiment comprises the first twisted-pair feeder interface 11, differential ference spiral module 12, analog switch 102, CPU 103, first signal picker 104, secondary signal collector 105, memory and signal output module etc.Bnc connector 101 is used to connect coaxial cable 50, the vision signal that makes DVR 10 connect video camera 20 and accept its transmission by this coaxial cable 50, and signal output module all links to each other with bnc connector 101 with memory.
When utilizing twisted-pair feeder 60 to connect video camera 20 and DVR 10, difference processing and differential ference spiral that video camera 20 and DVR 10 both sides need respectively to carry out vision signal are handled, thereby make the vision signal (abbreviation differential signal) of twisted-pair feeder 60 transmission video cameras 20 through difference processing.The first twisted-pair feeder interface 11 in the DVR 10 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.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.
Also can between analog switch 102 and signal output module, be connected A/D modular converter 13, DSP module 14 and D/A modular converter 15 successively, being used for vision signal that vision signal that demodulation is come out or bnc connector 101 accept carries out after analog-to-digital conversion, signal processing and the digital-to-analogue conversion can significantly improving signal quality again by signal output module output.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.(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.
Compare with coaxial cable 50, twisted-pair feeder 60 has characteristics such as long transmission distance, antijamming capability be strong, with low cost, therefore with 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, avoided or reduce phenomenons such as video distortion, time-delay.Yet, when perhaps some video cameras 20 can't directly directly link to each other with DVR 10 by twisted-pair feeder 60, can select for use bnc connector 101 to be connected with DVR 10 at some application scenarios.Therefore the occupation mode of the utility model DVR 10 more flexibly, can satisfy all kinds of demands of user, more convenient and practical.
Twisted-pair feeder 60 can be selected polytype flexibly for use, among the embodiment as shown in Figure 4, DVR 10 can comprise one or more first twisted-pair feeder interfaces 11, 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.
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.In the execution mode as shown in Figure 6, be provided with the power supply 40 that links to each other with the first twisted-pair feeder interface 11, differential ference spiral module 12, analog switch functional modules such as (not drawing among the figure) 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.When for example adopting CAT5E UTP cable 90 to be connected between the first twisted-pair feeder interface 11 and the video camera 20, CAT5E UTP cable 90 comprises 4 pairs of twisted-pair feeders 60, and wherein a pair of is video camera 20 transmission of video information, and other three pairs are divided into two groups and are used for transmitting power supply signals to video camera 20.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.
Above content is in conjunction with specific embodiments to further describing that the utility model is done, and 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. the DVR that inserts of a self adaptation, comprise memory and the connector that is used to be connected coaxial cable, described memory links to each other with described connector, it is characterized in that, also comprise 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, it is characterized in that, also comprise the analog switch that is used for described connector of gating or differential ference spiral module, 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.
3. DVR as claimed in claim 2, it is characterized in that, also comprise first signal picker, secondary signal collector and the CPU that links to each other with described analog switch, described first signal picker is connected between described first twisted-pair feeder interface and the CPU, and described secondary signal collector links to each other with described connector, CPU and analog switch.
4. DVR as claimed in claim 3 is characterized in that, also is connected the first gain amplifying unit between described differential ference spiral module and the described analog switch.
5. DVR as claimed in claim 3 is characterized in that, also is connected the second gain amplifying unit between described secondary signal collector and the described analog switch.
6. as each described DVR in the claim 1 to 5, 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 providing power supply signal by twisted-pair feeder to video camera.
7. as each described DVR in the claim 2 to 5, it is characterized in that, also comprise signal output module, described signal output module links to each other with described analog switch, is used for the vision signal after the demodulation of described differential ference spiral module or will be from the video signal transmission of described connector to video display devices.
8. DVR as claimed in claim 7 is characterized in that, also is connected A/D modular converter, DSP module and D/A modular converter successively between described analog switch and the signal output module, and described memory links to each other with described DSP module.
9. DVR as claimed in claim 8 is characterized in that, described memory is the DDR memory.
10. DVR as claimed in claim 8 is characterized in that, also comprises the fidelity processing module, and described fidelity processing module links to each other with described DSP module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206315746U CN201869310U (en) | 2010-11-29 | 2010-11-29 | Self-adaptively connected digital video recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206315746U CN201869310U (en) | 2010-11-29 | 2010-11-29 | Self-adaptively connected digital video recorder |
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| Publication Number | Publication Date |
|---|---|
| CN201869310U true CN201869310U (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206315746U Expired - Lifetime CN201869310U (en) | 2010-11-29 | 2010-11-29 | Self-adaptively connected digital video recorder |
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| CN (1) | CN201869310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111491113A (en) * | 2020-03-27 | 2020-08-04 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
-
2010
- 2010-11-29 CN CN2010206315746U patent/CN201869310U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111491113A (en) * | 2020-03-27 | 2020-08-04 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
| CN111491113B (en) * | 2020-03-27 | 2022-10-21 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
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Legal Events
| Date | Code | Title | Description |
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| 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 |
Granted publication date: 20110615 |
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| CX01 | Expiry of patent term |