CN101547342A - System and method for audio-video monitoring based on WLAN - Google Patents
System and method for audio-video monitoring based on WLAN Download PDFInfo
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- CN101547342A CN101547342A CN200810242116A CN200810242116A CN101547342A CN 101547342 A CN101547342 A CN 101547342A CN 200810242116 A CN200810242116 A CN 200810242116A CN 200810242116 A CN200810242116 A CN 200810242116A CN 101547342 A CN101547342 A CN 101547342A
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Abstract
The invention discloses a system and a method for audio-video monitoring based on WLAN. Each wireless AP (AP working mode) is respectively connected to a backbone network of a local area network to establish a cellular wireless roaming network. In the roaming network range, an IP network camera at the front end is connected to the local area network in a wireless mode through an audio-video signal wireless transceiver module (wireless AP of the Client working mode) and is used as a network server of the local area network. The client/server mode is adopted; the client can be any computer in the network or a mobile device such as a POCKET PC, a PDA, and the like; and the client can be connected to the same local area network in a wired or wireless mode to access the IP network camera to complete the reception, the control, the video decoding and the reappearance of network audio-video data. The system and the method really achieve real-time mobile video capture and video monitoring without being limited by time and places and complete mobile video monitoring in any position at any time.
Description
[technical field]
The present invention relates to technical field of television sets, particularly a kind of audio/video monitor and control system and method based on WLAN.
[background technology]
Video monitoring is a kind of remote real-time visual monitor system, and to the monitored condition video acquisition, far-end obtains the on-the-spot information of monitoring in real time by electronic eyes.Continuous development along with technology, traditional video monitoring system has had significant progress, yet the traditional video surveillance system adopts wired mode, when need arranging a large amount of netting twine, must fixedly all to arrange the video camera of a costliness in the control point at each, and there is certain limitation in the monitoring place, and the cost of building system is also very expensive, and then causes monitoring range, network cost, Channel Sharing, network size etc. all to be restricted; Traditional in addition safety monitoring system all is to adopt the cable TV mode, and the environment of so just must the monitor staff monitoring in the indoor observation post constantly of CSRC is extremely inconvenient.The characteristics of traditional video surveillance system itself cause it to be difficult to break away from cost height, difficulty is big, the cycle is long problem.Particularly along with the development of image processing techniques, also gradually toward digital development, video acquisition and processing system needs distinct image more to signal, and intelligence is effectively differentiated and recognizer more, aggravated the demand of bandwidth, these all are that the traditional video surveillance system is unapproachable.And Chinese patent the 200710052542.3rd discloses a kind of rail train real-time video monitoring system based on the WLAN technology, it takes the video monitoring technology of wired combining wireless, yet this system is because front end video acquisition and terminal video monitoring all utilize cable LAN to realize, just the front end video acquisition realizes that with the employing WLAN (wireless local area network) that is connected between the terminal video monitoring camera and monitor terminal all can't be realized moving; It adopts many platform independent server in addition, as data acquisition server, data receiving processor, streaming media server, and system configuration complexity, the cost height of realization.
[summary of the invention]
For addressing the above problem, main purpose of the present invention be to provide a kind of cost low, and can realize truly the real-time packaged type video acquisition and the video monitoring that are not subjected to time, site limitation, carry out any position, the audio/video monitor and control system and the method based on WLAN of mobile video monitor any time.
For achieving the above object, technical scheme of the present invention is:
A kind of audio/video monitor and control system based on WLAN includes terminal presentation facility, audio-video wireless transceiver module, IP network video camera and cellular radio roaming network; Described web camera includes CPU, and built-in Web Server and ccd image sensor have additional the picture number weighted-voltage D/A converter analog video is carried out digitized processing, and is finished the compression of image and sound and the dynamically playback of video recording by codec chip; Described radio roaming network includes a plurality of wireless aps, and each AP links to each other with cable network by netting twine respectively, forms the wireless network based on cable network.
A kind of audio-video monitoring method based on WLAN is characterized in that, comprises the steps:
Adopt the IP network video camera, audio-video collection, coding, compression and web page server are integrated in one, as the server that can independently operate;
With the backbone network of each wireless aps difference access to LAN, set up the cellular radio roaming network; In the roaming network scope, the IP network video camera of front end passes through audio-video signal radio receiving transmitting module access to LAN wirelessly, as a webserver of local area network (LAN);
The client mobile device all can insert same local area network (LAN) by wired or wireless mode, and visit IP network video camera is finished reception, control, video decode and the reproduction of network audio-video data;
The IP network video camera also can directly connect ADSL/CABLE MODEM, cooperates DDNS dynamically to net the territory agreement with PPPoE and independently uses to finish network video and supervise function.
Compared to prior art, the present invention is based on WLAN technical transmission video data, bandwidth is big, the fast and clear picture of transmission speed; Adopt the IP network video camera, audio-video collection, coding, compression and web page server are integrated in one,, need not camera and network video server to be installed, reduced cost in a plurality of fixing control points as the server that can independently operate; Take the radio roaming network, under the basis of setting up the cellular radio roaming network, the IP network video camera connects wireless aps (Client mode of operation) with wireless receiving and dispatching audio, video data and control data, realize the real-time packaged type video acquisition and the video monitoring that are not subjected to the time site limitation truly, carried out the mobile video monitor of any position, time.
[description of drawings]
Fig. 1 is the theory diagram that the present invention is based on the audio/video monitor and control system of WLAN.
Fig. 2 is an IP network video camera theory structure block diagram of the present invention.
Fig. 3 is a radio roaming network chart of the present invention.
[embodiment]
The present invention is based on the audio/video monitor and control system of WLAN and the backbone network that method passes through each wireless aps (AP mode of operation) is distinguished access to LAN, set up the cellular radio roaming network; In the roaming network scope, the IP network video camera of front end is by audio-video signal radio receiving transmitting module (being the wireless aps of Client mode of operation) access to LAN wirelessly, as a webserver of local area network (LAN); Adopt the mode of client/server, client is any computer in the network, with mobile devices such as POCKET PC, PDA, all can insert same local area network (LAN) by wired or wireless mode, visit IP network video camera is finished reception, cradle head control, video decode and the reproduction of network audio-video data; The IP network video camera also can directly connect ADSL/CABLE MODEM, cooperates DDNS dynamically to net the territory agreement with PPPoE and independently makes and be used for finishing network video and supervise function.
See also Fig. 1, shown in Figure 2, the audio/video monitor and control system that the present invention is based on WLAN includes IP network video camera, cellular radio roaming network, audio-video wireless transceiver module and terminal presentation facility.
Web camera includes IMAQ parts such as camera lens, optical filtering, also include CPU in addition, built-in Web Server and ccd image sensor, increased the picture number weighted-voltage D/A converter analog video has been carried out digitized processing, and finished the compression of image and sound and the dynamically playback of video recording by codec chip.The IP network video camera is gathered audio-video signal, handles, encodes, compresses, and carry out system management and network communication control.If in the local area network (LAN) Dynamic Host Configuration Protocol server is arranged, promptly drive attitude distributing IP address function, then can be set to obtain automatically IP by the IP network video camera, this moment is under roaming network, the IP network video camera is connected to local area network (LAN) by the wireless aps that is operated in the Client pattern, and obtains the IP address of the same network segment.If do not have Dynamic Host Configuration Protocol server in the local area network (LAN), then the static ip address of web camera need be set, and guarantee that set IP address and local area network (LAN) are the same network segment.In addition, the IP network video camera can directly connect ADSL/CABLE MODEM, cooperates DDNS dynamically to net the territory agreement with PPPoE and independently uses, or connect router or IP Wireless Router and set nat feature and reach network video and supervise function.The image that described IP network video camera is taken both can send PC to, also can be added on the homepage of Web website, perhaps was attached in the Email to send.
Shown in Figure 3 is the radio roaming network that 4 wireless aps are formed, and four wireless aps link to each other with cable network by netting twine respectively, forms the wireless network based on cable network.All terminal presentation facilities are connected into network by nearest wireless aps, realize the visit to whole Internet resources.For each wireless aps is distributed the IP address, and the IP address that guarantees all wireless aps is all at the same network segment, to realize radio roaming.Each wireless aps all is arranged to ap mode, and set SSID must be identical.If encryption is set, the cipher mode of wireless aps also must be identical with encrypted secret key so.Because the mutual juxtaposition of a plurality of AP signal coverage areas, therefore, must observe certain standard between each shared channel in AP overlay area, can not cover mutually between the contiguous same channel, otherwise can cause the phase mutual interference of AP when signal transmits, thereby reduce the operating efficiency of AP.802.11b and the 802.11g agreement is operated on 2.4000GHz～2.4835GHz channel, exist 11 overlapped channels altogether, it is nonoverlapping having only three channels in these 11 channels, is respectively channel 1,6,11, therefore, use this three channels during radio roaming.
Also can use when setting up the cellular radio roaming network " wireless aps+wireless router " or " wireless router+wireless router ", wireless aps and wireless router are provided with identical SSID, cipher mode, password, with different channels, if have Dynamic Host Configuration Protocol server in the local area network (LAN), wireless router is by LAN mouth access to LAN, and close its DHCP function and close, otherwise 2 DHCP can appear in the local area network (LAN), will cause other computers to obtain incorrect IP address.
Wireless access point AP is the core of WLAN, use can further the increase coverage of wireless network of wireless lan antenna or a plurality of AP, monitoring range is enlarged, build the cellular radio roaming network, set up the cellular radio roaming network by a plurality of wireless access point AP, realized front end movable wireless audio-video collection and client movably audio frequency and video demonstration and monitoring.
The present invention adopts the wireless aps that is operated under the Client pattern, as the transceiver of audio-video signal.Link to each other with the netting twine interface of wireless aps with the RJ-45 Ethernet interface of twisted-pair feeder the IP network video camera, it is Client mode of operation (wireless aps client mode) that wireless aps is set, with identical SSID, cipher mode, the password of AP in the cellular radio roaming network.AP in the AP of Client pattern and the cellular radio roaming network constitutes wireless network, the audio-video signal that transmission IP network camera acquisition arrives.The audio-video wireless transceiver module makes native system have mobility, and the optional position in the coverage of radio roaming network is as long as can realize wireless video monitoring to IP network video camera and the AP power supply that is operated under the Client pattern.The IP network video camera converts analog video stream to digital stream, offers the audio-video signal radio receiving transmitting module, promptly is operated in the AP under the Client pattern, carries out the wireless transmission of data.
Described terminal presentation facility comprises any computer, POCKET PC and the PDA mobile device in the network, only need the IP address or the net domain name of input IP network video camera on the IE browser long-range user, just can be in real time by the remotely inspecting image and have video, function such as take pictures, use that operation is very easy.When mobile devices such as use POCKET PC and PDA, need the support of wireless network.Mobile devices such as POCKET PC and PDA at first are connected to local area network (LAN) by WAP (wireless access point), and visit IP network camera server receives the audio, video data that the IP network video camera transmits.Wherein the wireless network setting of POCKER PC and PDA need be consistent with the AP in the cellular radio roaming network, as the IP address of phase same network segment, and identical SSID, identical cipher mode and password.The frame buffer technology that adopts terminal presentation facility realizes the real-time reception and the broadcast of video, so just can one side receiving video data, Yi Bian display video again.Because video data is to adopt the MPEG-4 standard compression, can not play-over, must decompress, obtain real video data stream behind the decompress(ion), on the lcd screen of PDA, play.Use the advantage of frame buffer technology to be consistency efficiently, lower system resource occupancy, and stability, can satisfy the needs of real-time displaying video.
The present invention adopts WLAN technical transmission video data, and bandwidth is big, possesses the advantage of the fast and clear picture of transmission speed; Adopt the IP network video camera, audio-video collection, coding, compression and web page server are integrated in one,, need not various servers are set in addition, reduced cost as the server that can independently operate; With the wireless aps under the ap mode is core, build the cellular radio roaming network, show and established technical foundation for realizing that the portable audio-video signal in portable wireless audio and video signals collecting of front end and rear end receives, realized in any position, movably carried out audio-video monitoring any time.
Most preferred embodiment described above only is that the present invention is set forth and illustrates, but is not limited to disclosed any concrete form, and it is possible carrying out many modifications and variations.
Claims (10)
1. audio/video monitor and control system based on WLAN, include terminal presentation facility and audio-video wireless transceiver module, it is characterized in that: also include IP network video camera and cellular radio roaming network, described web camera includes CPU, built-in Web Server and ccd image sensor, have additional the picture number weighted-voltage D/A converter analog video is carried out digitized processing, and finish the compression of image and sound and the dynamically playback of video recording by codec chip; Described radio roaming network includes a plurality of wireless aps, and each AP links to each other with cable network by netting twine respectively, forms the wireless network based on cable network.
2. the audio/video monitor and control system based on WLAN as claimed in claim 1, it is characterized in that: described IP network video camera can directly connect ADSL/CABLE MODEM, cooperate DDNS dynamically to net the territory agreement with PPPoE and independently use, or connect router or IP Wireless Router and set nat feature and reach network video and supervise function.
3. the audio/video monitor and control system based on WLAN as claimed in claim 2 is characterized in that: described terminal is connected into network by nearest wireless aps, realizes the visit to whole Internet resources; For each wireless aps is distributed the IP address, and the IP address that guarantees all wireless aps is all at the same network segment, to realize radio roaming.
4. the audio/video monitor and control system based on WLAN as claimed in claim 3, it is characterized in that: also can use " wireless aps+wireless router " or " wireless router+wireless router " mode when setting up the cellular radio roaming network, wireless aps and wireless router are provided with identical SSID, cipher mode, password, with different channels.
5. the audio/video monitor and control system based on WLAN as claimed in claim 4 is characterized in that: adopt the wireless aps that is operated under the Client pattern, as the transceiver of audio-video signal; Described IP network video camera links to each other its RJ-45 Ethernet interface by twisted-pair feeder with the netting twine interface of wireless aps, it is the Client mode of operation that wireless aps is set.
6. the audio/video monitor and control system based on WLAN as claimed in claim 5 is characterized in that: described terminal presentation facility comprises any computer, POCKET PC and the PDA mobile device in the network.
7. the audio-video monitoring method based on WLAN is characterized in that, comprises the steps:
Adopt the IP network video camera, audio-video collection, coding, compression and web page server are integrated in one, as the server that can independently operate;
With the backbone network of each wireless aps difference access to LAN, set up the cellular radio roaming network; In the roaming network scope, the IP network video camera of front end passes through audio-video signal radio receiving transmitting module access to LAN wirelessly, as a webserver of local area network (LAN);
The client mobile device all can insert same local area network (LAN) by wired or wireless mode, and visit IP network video camera is finished reception, control, video decode and the reproduction of network audio-video data;
The IP network video camera also can directly connect ADSL/CABLE MODEM, cooperates DDNS dynamically to net the territory agreement with PPPoE and independently makes and be used for finishing network video and supervise function.
8. the audio-video monitoring method based on WLAN as claimed in claim 7 is characterized in that: all terminal presentation facilities are connected into network by nearest wireless aps; For each wireless aps is distributed the IP address, and the IP address that guarantees all wireless aps is all at the same network segment, to realize radio roaming; Each wireless aps all is arranged to ap mode, and set SSID must be identical.
9. the audio-video monitoring method based on WLAN as claimed in claim 8 is characterized in that: adopt the wireless aps that is operated under the Client pattern, as the transceiver of audio-video signal; Link to each other with the netting twine interface of wireless aps with the RJ-45 Ethernet interface of twisted-pair feeder with the IP network video camera, it is the Client mode of operation that wireless aps is set; AP in the AP of Client pattern and the cellular radio roaming network constitutes wireless network, the audio-video signal that transmission IP network camera acquisition arrives.
10. the audio-video monitoring method based on WLAN as claimed in claim 9, it is characterized in that: the IP network video camera converts analog video stream to digital stream, offer the audio-video signal radio receiving transmitting module, promptly be operated in the AP under the Client pattern, carry out the wireless transmission of data; The image that the IP network video camera is taken both can send PC to, also can be added on the homepage of Web website, perhaps was attached in the Email to send.
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| CN200810242116A CN101547342A (en) | 2008-12-31 | 2008-12-31 | System and method for audio-video monitoring based on WLAN |
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| CN200810242116A CN101547342A (en) | 2008-12-31 | 2008-12-31 | System and method for audio-video monitoring based on WLAN |
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| CN101945007A (en) * | 2010-09-03 | 2011-01-12 | 浙江鸿程计算机系统有限公司 | Method for monitoring dynamic IP access equipment |
| CN102186071A (en) * | 2010-12-09 | 2011-09-14 | 无锡乐智科技有限公司 | Multichannel wireless IP multimedia transmission system |
| CN102300081A (en) * | 2011-08-16 | 2011-12-28 | 深圳市佳信捷电子有限公司 | Audio and video monitoring equipment, system and method thereof |
| CN102364928A (en) * | 2011-09-09 | 2012-02-29 | 深圳市三辰科技有限公司 | Network camera system |
| CN102426742A (en) * | 2011-09-21 | 2012-04-25 | 太仓市同维电子有限公司 | Safety protection system based on wireless router and method thereof |
| CN102707994A (en) * | 2012-04-27 | 2012-10-03 | 西安电子科技大学 | Method for controlling computer by handheld mobile equipment in local area network |
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| CN102300081A (en) * | 2011-08-16 | 2011-12-28 | 深圳市佳信捷电子有限公司 | Audio and video monitoring equipment, system and method thereof |
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| CN104244228A (en) * | 2013-06-19 | 2014-12-24 | 范世杰 | Ad hoc network system and establishing method |
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| CN105100746B (en) * | 2015-08-31 | 2018-03-23 | 国网浙江省电力公司湖州供电公司 | A kind of supervisory control of substation device |
| CN105100746A (en) * | 2015-08-31 | 2015-11-25 | 国网浙江省电力公司湖州供电公司 | Transformer substation monitoring device |
| CN105263134A (en) * | 2015-10-08 | 2016-01-20 | 惠州Tcl移动通信有限公司 | Image transmission method and mobile equipment |
| CN109151480A (en) * | 2017-06-16 | 2019-01-04 | 宝山钢铁股份有限公司 | A kind of Video coding wireless transmission and reception device and method |
| US11206412B2 (en) | 2018-02-20 | 2021-12-21 | Netgear, Inc. | Band steering for a low power device |
| CN110191309A (en) * | 2018-02-20 | 2019-08-30 | 网件公司 | House security system based on grid |
| US11006128B2 (en) | 2018-02-20 | 2021-05-11 | Arlo Technologies, Inc. | Camera communication channel selection |
| US11290727B2 (en) | 2018-02-20 | 2022-03-29 | Arlo Technologies, Inc. | Camera communication channel selection |
| US11576127B2 (en) | 2018-02-20 | 2023-02-07 | Netgear, Inc. | Mesh-based home security system |
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| CN108563471A (en) * | 2018-03-29 | 2018-09-21 | 四川斐讯信息技术有限公司 | A kind of method and apparatus and its control method and device of operation APP programs |
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| CN111031060B (en) * | 2019-12-20 | 2021-11-16 | 合肥学院 | Computer network safety monitoring device |
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Application publication date: 20090930 |