Wireless video surveillance technology to quickly develop continuing progress

Video surveillance is the telecom operator provides the most important one of industrial applications.

With the wireless network technology for the rapid development of wireless video surveillance.

Video surveillance is the telecom operator provides the most important one of industrial applications.

Before the application is mainly based on fixed networks, through the cable way; now, with the wireless network technology for the rapid development of wireless video surveillance. On the one hand, it passed from cable wuxianhua, greatly enhances the flexibility and reduce cost; on the other hand, wireless video transmission technology, networking technology, Terminal technology continues to develop, also let wireless video monitoring of performance and make it increasingly able to compete with cable pattern.

Wuxianhua is direction

For a long time, the video surveillance system is mainly used on important regional or remote locations of the monitoring and control, video surveillance technology in power systems, telecommunications, computer rooms, factories, urban transport, water systems, community policing, and other areas have also been increasingly widely used.

Video surveillance system to monitor real-time acquisition of video streams in real time transmission to the monitoring Center for easy monitoring Center for remote monitoring, incident handling time command.

Based on a traditional wired network video monitoring, there is a clear disadvantage.

These shortcomings include: placement of restricted, the selection of monitoring points are generally close to the wired access point, this approach limits the placement flexibility; the placement of large quantities, you need to lay cables and fibre, as the basis for network engineering tend to be very large, so the General cable monitoring comparison applies to existing basic network applications; project cycle length, the laying of the Foundation network time-consuming; a lack of flexibility, extend and adjust the inconvenient, will increase the quantity and not necessary basis for network building; lack of mobility, this is a congenital defect of the cable network.

In order to address the above issues, wireless video surveillance emerged, allowing video Shenwu monitoring for cable and various restrictions associated with.

It is foreseeable that accompanied the wireless video surveillance-related technology, continuous improvement, such as Terminal technology, networking technology, transport, technology, wireless video monitoring business will become wireless network technology is one of the most typical applications, will become wireless city of one of the "killer application".

Improved monitor Terminal

Wireless video services for bit error rate, switching delay, bandwidth efficiency, stability and more demanding with regard to the processing, if these are not good, video screen will appear mosaic, skip screen, pauses, etc.

We all know, the original WLAN technology is not in accordance with the requirements of mass operations systems for Telecom, the base version for switch across AP issues does not provide for the General Terminal switch between AP efficiency is very low. Additionally, for AP and terminal for video business no special treatment, and ordinary PS domain data, these factors will lead to very good launch video monitoring, voice and other real-time traffic.

Improved video Terminal, it is one of the ways in which these issues, domestic equipment manufacturers have Mesh-WLAN exclusively launched video dedicated terminal equipment.

For example, Shanghai communication video Atlas to create dedicated terminal equipment, to improve the performance by switching technology, allowing the WLAN network, whether designated supervisory or vehicle monitoring effects are very good and the video smoothly.

In addition, if the underlying network just WLAN network, if you can use demand customized video surveillance solution, you can get better results.

For example, you can deploy a foundation network, Mesh-WLAN while vehicle Terminal also use Mesh equipment, thereby avoiding some of the WLAN network switch made worse.

With the development of broadband wireless technology, wireless video surveillance will be more and more widely used in the field, such as ports, oil field, campus, rail transport and other industries.

For example, China Telecom, use the wireless network has launched a wireless monitor business, mainly involving sentinel surveillance and vehicle monitoring.

Innovation and transfer technology

For wireless video monitoring, wireless video transmission technology is affecting their performance and the performance of important factors.

Therefore, wireless video transmission in technology development, and constantly improve wireless video surveillance applications.

High-definition video content for wireless transmission is a relatively difficult technical problems, many manufacturers are tackling.

High-speed Edition Wi-Fi can solve this problem, but it requires the video data compression, image quality may be affected. Because the wireless connection at both ends of the chip requires complete compression, decompression tasks, so the transmission delay of the screen will appear. This situation prompted the vendor research faster, does not require compression of wireless transmission technology. Called WirelessHD technology to blazing fast speed transfer uncompressed video signal, but it will take several years to achieve commercialization. Moreover, the WirelessHD transmission distance is limited, only applies to the room to transmit signals, not suitable for transmission of signals in the home. Another technique is ultra-wideband (UWB). It's in the compresses images requirements below Wi-Fi, but the transmission distance is greater restrictions. Third choice, it is wireless home digital interface (WHDI), at present, the technology has gained broad support in the industry.

Three wireless video technology has pros and cons, determines the choice of not uniformity.

WHDI is recent choice WirelessHD is expected to become the future direction of development. Market analysis institutions ParksAssociates analyst Scott ·, penetrating, the transmission distance WHDI allows it has certain advantages. Sony as the support of the industry organization of WirelessHD, in a statement, said the company support WHDI is designed to have more choices. Samsung Electronics is considered, WHDI is a bridging technology, WirelessHD technology maturity will turn this technology. Samsung is responsible for TV's Vice President of technology researchJaeMoonJo said that Samsung believes that in the long term, WirelessHD will is the ultimate solution.

Currently, Sony, Samsung, Motorola, sharp and Hitachi has established Alliance, a cooperative effort to create an Israel-based company WHDI technology Amimon.

The wireless video transmission technology, from a set-top boxes wirelessly to the family all display devices transmit high-definition video signals. Amimon Partnership founder GNOME · Jerry said, the family TV will be able to receive from any audio source in the family of content-the living room of set-top boxes, game consoles of PS in the bedroom or another DVD player in the bedroom, which is the technology fits WH-DI.

Union will significantly broaden the application of this technology.

Currently, Amimon has sales WHDI chip, but set up a Trade Union will enable consumers to buy from different manufacturers support WHDI technology products, and these products are not in conflict. Jerry is expected with the television Amimon chip will be on sale next year, the price will be higher than normal TV for about $ 100.