CN201781582U - Network camera - Google Patents
Network camera Download PDFInfo
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- CN201781582U CN201781582U CN 201020513377 CN201020513377U CN201781582U CN 201781582 U CN201781582 U CN 201781582U CN 201020513377 CN201020513377 CN 201020513377 CN 201020513377 U CN201020513377 U CN 201020513377U CN 201781582 U CN201781582 U CN 201781582U
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Abstract
The utility model relates to a network camera based on an internal digital interface. The network camera is characterized in that a digital signal output terminal of an image sensor module for a CCD (charge coupled device) is correspondingly connected with a signal input terminal of a multimedia application processor, wherein a first signal input terminal/output terminal of the multimedia application processor is correspondingly connected with a signal output/input terminal of an audio codec, a second signal input terminal/output terminal of the multimedia application processor is correspondingly connected with a signal output/input terminal of a network controller, and a third signal input terminal/output terminal of the multimedia application processor is correspondingly connected with a signal output/input terminal of an alarm controller. The network camera has the advantages that since the digital interface of the CCD sensor module is directly adopted, the signal loss of conversion between an analog video and a digital video is avoided in the design of the ordinary network camera; the image reaches the resolution with D1 (720*576) format, and all the images can be transmitted over the network; meanwhile, the video signal, the audio signal and the alarm control signal are all transmitted through the network.
Description
Technical field
The utility model relates to a kind of digital, web camera of having audio frequency output and controlling alarm output concurrently.Belong to networking technology area.
Background technology
Video monitoring system is widely used in many occasions so that it is directly perceived, convenient, the information content is abundant.The product that has in the market has analog video monitoring and Network Video Surveillance.Traditional analog video monitoring technique development is very ripe, stable performance, how with simulation camera collection analog video signal, be transferred to Surveillance center by coaxial cable then, because signal is subjected to the decay of various interference and signal inevitably in transmission course, there is certain difficulty in long Distance Transmission, adopts the transmission of twisted-pair feeder and analog optical fiber to solve long Distance Transmission problem, but has increased the cost of system.Because analog signal transmission adopts the base band mode to carry out usually, make the structure of video camera and monitor terminal can only adopt man-to-man form in addition.Make the topological structure of whole system become complicated, increased the cost of comprehensive wiring, if desired video camera is controlled, also need add control circuit.Along with developing rapidly of computer networking technology, the Internet is very universal.The networking of video monitoring system forward, digitlization and intelligentized direction develop, and wherein, web camera (IPCAM) will be the significant components of network digital video monitoring.Functions such as video acquisition, image processing, video compression that it is integrated, utilize network technology, influence and sound can be reached the world Anywhere, and the viewer of far-end need not to use any professional software, as long as but the web browser of standard with regard to the image and the sound of synchronization monitoring front end, is realized Long-distance Control.By management software, can realize that also online multiple spot supervises, local video recording, functions such as playback, and monitoring is counted and can be expanded arbitrarily.
Network digital video monitoring video camera on the present stage market generally partly is made up of camera lens, imageing sensor, sound transducer, A/D analog to digital converter, the webserver (embedded chip), external alert, control interface etc.The built-in embedded chip of described web camera adopts embedded real-time operating system.The vision signal that described camera lens sends by efficient compression chip compression, is sent to server by network after the digitlization of A/D analog to digital converter.The user can be directly watches camera review on the Web server with browser on the network.The front end that can see the prior art web camera needs the A/D modulus conversion chip analog image of transducer output is carried out the digitlization conversion, the conversion meeting of A/D modulus will make the degradation of output image, and increases the A/D modulus conversion chip with regard to problems such as cost height, the system that has had equipment complicate.
Summary of the invention
The purpose of this utility model just provides a kind of web camera, the direct digital signal of reading images transducer, and directly carry out digital communication between the webserver, to reduce the loss of picture signal.
Technical solution of the present utility model: corresponding the joining of signal input part that it is characterized in that signal output part with the multimedia application processor of CCD charge coupled cell imageing sensor module; The first signal I/O end of multimedia application processor and corresponding the joining of signal output/input of audio codec; The secondary signal I/O end of multimedia application processor and corresponding the joining of signal output/input of network controller; The 3rd signal I/O end of multimedia application processor and corresponding the joining of signal output/input of alarm controller
Advantage of the present utility model: compared with prior art be in particular in,
(1) video flowing of the H.264 compressed digital video encoding and decoding standard form of web camera transmission, image can reach the resolution of D1 (720 * 576) form, and all images can both be in transmission over networks.
(2) adopt CCD charge coupled cell imageing sensor as the picture signal sampler, and the digital signal of pick-up transducers is directly inputted into multimedia application processor.
(3) can be simultaneously with vision signal, audio signal, alarm control signal transmits by network.
Description of drawings
Accompanying drawing 1 is the structured flowchart of web camera.
Embodiment
CCD charge coupled cell imageing sensor module 1 includes optical system, the receiving optics signal, output meets the digital video signal of ITU-REC656 international telecommunication association video standard, CCD charge coupled cell imageing sensor module 1 joins by FPC winding displacement and multimedia application processor, utilize multimedia application processor the view data that collects to be carried out the H.264 compression of compressed digital video encoding and decoding standard form as video coding chip, then with transfer of data to network controller, by network controller, view data is sent to Surveillance center; Multimedia application processor controller taking alarm simultaneously, and connect audio codec 3, with collection in worksite to alarm signal and audio signal be sent to the center by network.
As requested, can export H.264 image encoded of the highest D1 (720 * 576) format resolution,, adjust the bit rate output of digital picture, the self-adapting network situation perhaps according to network traffics.CCD charge coupled cell imageing sensor module is formed image output circuit by ICX409CCD imageing sensor, CXA2096CCD front-end amplifier and CXD3172CCD video signal preprocessor chip, ICX409CCD imageing sensor and CXA2096CCD front-end amplifier are formed the optical signalling output circuit, raw video signal is provided for the CXD3172CCD video signal preprocessor, the digital video signal of the P8 of CXD3172CCD video signal preprocessor～P15 pin output YUV YC separate colors coding method; DCK digital dock output pin output digital image clock signal; This group signal is delivered to multimedia application processor.
Multimedia application processor adopts the i.mx27 multimedia application processor, this circuit receives the digital video signal and the image clock signal of the YUV YC separate colors coding method that meets ITU-REC656 international telecommunication association video standard, and every two field picture Real Time Compression become H.264 data, form H.264 compressed digital video encoding and decoding standard formatted data stream, and it is packaged into the tcp transmission control protocol packet, receive the alarm signal of alarm controller input and the digital audio and video signals of audio coding decoding chip input, after packing, pass through MII Media Independent Interface, sending network controller in the lump with video data stream.
Audio codec adopts WM8974 monophonic audio codec chip, this circuit will connect microphone and loud speaker respectively, become digital signal to be sent to multimedia application processor with collecting audio-frequency signal coding on the microphone, it is that audio signal output is to loud speaker that multimedia application processor is received digital signal decoding, WM8974 monophonic audio codec chip will be linked the SSI synchronous serial interface of i.mx27 multimedia application processor, realize two way voice communication under the control of imx27.
Network controller adopts RTL820110/100M ethernet physical layer exchange chip, and this circuit is sent multimedia application processor here by the MII Media Independent Interface tcp transmission control protocol packet changes
Change pulsed current signal into, and, transfer signals to network and get on, form oscillating circuit, the work clock of network interface circuit is provided by quartz crystal, two electric capacity by transformer.
Alarm controller adopts SP3485RS-485 transceiver and MAX3232RS-232 transceiver, this circuit receives the alarm signal of external alert device, according to the transmission means of the employing of alarm appliance respectively by 485 transmission or 232 transmission, the alarm signal that receives is sent to multimedia application processor, and by network signal is reached Surveillance center.
CCD charge coupled cell imageing sensor module is used to obtain video data; Multimedia application processor is used for the data that comprise voice data and video data are handled and communicated by network and external equipment; Audio coder-decoder is used for the voice signal at scene is encoded and transmitted the voice signal that decoding network simultaneously sends back by network, finishes voice communication; Network controller is used for multimedia application processor is connected with network by wired mode; Alarm controller is used to receive on-the-spot alarm control signal and transmits by network.
Web camera is based on the internal digital interface.
Claims (3)
1. web camera, corresponding the joining of signal input part that it is characterized in that signal output part with the multimedia application processor of CCD charge coupled cell imageing sensor module, the first signal I/O end of multimedia application processor and corresponding the joining of signal output/input of audio codec, the secondary signal I/O end of multimedia application processor and corresponding the joining of signal output/input of network controller, the 3rd signal I/O end of multimedia application processor and corresponding the joining of signal output/input of alarm controller.
2. web camera according to claim 1, the digital video signal that it is characterized in that the output of CCD charge coupled cell imageing sensor module, join by FPC winding displacement and multimedia application processor, utilize multimedia application processor the view data that collects to be carried out the H.264 compression of compressed digital video encoding and decoding standard form as video coding chip, then with transfer of data to network controller, by network controller, view data is sent to Surveillance center; Multimedia application processor controller taking alarm and connect audio codec simultaneously, with collection in worksite to alarm signal and audio signal be sent to the center by network.
3. web camera according to claim 2, it is characterized in that CCD charge coupled cell imageing sensor module comprises the ICX409CCD imageing sensor, CXA2096CCD front-end amplifier and CXD3172CCD video signal preprocessor chip, wherein ICX409CCD imageing sensor and CXA2096CCD front-end amplifier and image output circuit are formed the optical signalling output circuit, raw video signal is provided for the CXD3172CCD video signal preprocessor, the digital video signal of the P8 of CXD3172CCD video signal preprocessor～P15 pin output YUV YC separate colors coding method; DCK digital dock output pin output digital image clock signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020513377 CN201781582U (en) | 2010-09-02 | 2010-09-02 | Network camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020513377 CN201781582U (en) | 2010-09-02 | 2010-09-02 | Network camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781582U true CN201781582U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020513377 Expired - Fee Related CN201781582U (en) | 2010-09-02 | 2010-09-02 | Network camera |
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| Country | Link |
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| CN (1) | CN201781582U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951499A (en) * | 2010-09-02 | 2011-01-19 | 南京南自信息技术有限公司 | Network camera |
| CN102333183A (en) * | 2011-07-20 | 2012-01-25 | 苏州盛开信息科技有限公司 | Web camera for synchronization voice transmission |
| CN104298146A (en) * | 2013-07-17 | 2015-01-21 | 中兴通讯股份有限公司 | Sensor control method and device |
-
2010
- 2010-09-02 CN CN 201020513377 patent/CN201781582U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951499A (en) * | 2010-09-02 | 2011-01-19 | 南京南自信息技术有限公司 | Network camera |
| CN101951499B (en) * | 2010-09-02 | 2012-11-07 | 南京南自信息技术有限公司 | Network camera |
| CN102333183A (en) * | 2011-07-20 | 2012-01-25 | 苏州盛开信息科技有限公司 | Web camera for synchronization voice transmission |
| CN104298146A (en) * | 2013-07-17 | 2015-01-21 | 中兴通讯股份有限公司 | Sensor control method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20130902 |