2009, video surveillance cameras to the network after the transition, HD (High-Definition) has become a security video surveillance goal to pursue HD-SDI cameras have been some industry insiders are widely valued in the application obstacles has also become a stumbling block to the development of its market.

The HD lens does not match

Various manufacturers in the production of products sensitive components, lack of uniform consensus, some of the CCD, and some lack of clear under such conditions makes can be used with HD lens with CMOS, in addition to the board lens (BoardLens), gun The machine selection with non-spherical high-definition megapixels lens can say very little, while the modules of the high-speed ball lens is less, of course, many lens manufacturers also said it is trying to launch such products, I believe the shortest possible time will make up this gap.

Transmission distance of less than

HD-SDI cameras began to be introduced to the market often questioned the transmission distance is too short ". , If the HDMI is only tens of meters, even if only with a coaxial cable 100 meters. These claims affect the project to the idea of ​​using HD-SDI camera, but in fact, network surveillance cameras, then why not by the distance limitations? Network cable, without the PoE Cat.5 or the Cat.6 also only 120 meters effective distance, the front-end to monitor the "last mile" network monitoring also need to consider the transmission wire and distance.

Manufacturers have begun to attach importance to transmission problems, in addition to the development of 3G-SDI products use the transmission rate to increase the transmission distance is also HD-TX chip FPGA design architecture Dirac video compression technology to produce the pressure loss (losslesscompression) , the distance to 300 meters, but also by the 128/168/192 woven coaxial or UTP cable line material selection, high-frequency loss of the merits of conditions to reduce line losses and the extension of the HD-SDI the signal transmission distance, in the manufacturers part HDcctv Alliance can refer to the title of the set distance and the distance of the three cable applications (see Table 1).

The most common, HD-SDI conversion turn Fiber Optical fiber-optic cables transmit at the same time in order to be able to meet the multi-channel HD-SDI signals, unidirectional or bidirectional transmission, Optical WDM / DWDM / of CWDM multi-channel optical wavelength sub-frequency mode of transmission, to reach all the way more than HD-SDI optical signal carrying the transmission requirements, which allows the HD-SDI camera signal transmission to 30-70 km.

Can not remote control?

Many manufacturers are worried that the HD-SDI can not control the transmission of voice signals, but of Figure 3HDcctv industry in the development process diagram, see, on this part was originally expected to solve the second half of 2011, but in fact is already in the first half of 2011 was technologically advanced manufacturers to overcome, but also reached a two-way transmission of PTZ and audio capabilities, vendors transition from the traditional monitoring network monitoring powerless to eat the pieces of reassurance, through the coaxial transmission signal carrier (CarriesWave) technology has been embedded in the signal useless part of this is similar to past 16/32bit single coaxial transmission way transmission control and voice signals. This step to HD-SDI matrix appear to open the road of technology, the traditional matrix systems has been revived in HD caught opportunity.

The lack of visual display products

Monitoring system image is rendered on multi-CVBS simulation signal input, and VGA display terminals based, high-definition multi-720P/1080i for display format, while the digital TV HDTVSMPTE-296M/274M requirements, the input format is most HDMI or DVI and YC signal interface format, and most of the display manufacturers to hear the HD-SDI HD demand intuitive interface of the HDMI interface identified relative to the SDI signal interface format, BNC or the best choice.

Solve the back-end control and power supply problems

Up to now, most monitors can support HDMI-1080P, but the relative embedded SDI receiver chip and SDI Interface Format proceed to find only part in the small size of the screen and big screen, this is the HD-SDI development case to the biggest problem.

Can see that not have been resolved

HD-TX/RX transmitter and receiver chip there is no improvement, the HD-SDI, storage problems, just like "960H" images are stored, not like the network camera as network architecture, storage, and will not try to save " .

Chip problem solving and the HybridDVR concept of influence and SDI-DVR, this problem does not bother to want to use HD-SDI camera Contractors Network HD monitor, HD-SDI storage requirements for peer , and more advantage of the HD-SDI can guarantee the road like a clear and real-time network HD is necessary for the flow of bandwidth and image codes to worry about whether beneath the frame. From the capacity point of view, the HD-SDI, the storage space occupied by the same network camera image is almost the same.

No platform for centralized management and control

HD-SDI cameras is the lack of systematic management platform tools, and encountered a big problem in the integration, centralized management and control. South Korea in the highway project to achieve this need. The project, the front part of a coaxial cable with Optical transmission signal back side of the road traffic control center, after the conversion of the HD-RX board, or the Four DirectionsOctuple a way, the signal enter directly into BT.1120 format with networking and network management features DVR or by boards composed of HD-SDIVideoServer, to incorporate all of the DVR network management software management platform, not only to reach the platform management requirements in the clustering grouping is more convenient, fast highway screen to allocate work, platform software in accordance with the control protocol standardized conditions to reach the HD-SDI camera PTZ control.

Front-end not the "brains"

From a variety of analysis and the actual product testing can be seen in the IVS of the HD-SDI or VCA Video Intelligence function through the HD-TX chip is divided into compression also non-CPU computing front of the camera HD-SDI In addition to the large area of ​​privacy blanking (mask) displacement the dynamic detect (MotionDetection,) with the OSD and other features, can not do some picturesque line statistics and other high-end smart use of the deadline date, component manufacturers release the world's first HD 1080p @ 30fps HD chip with intelligent analysis capabilities, let us wait and see.

Power supply: non-issue

HD-SDI camera taking into account the alternative to the existing analog cameras for the purpose of so many manufacturers are not particularly concerned about the issue of electricity supply. However, the network camera focus on publicity PoE power supply environment, some manufacturers also hope that through the power supply to the development of new selling HD-SDI cameras. Electricity required by the coaxial cable camera PoC (PoweroverCoaxialCable) way, the manufacturers of this technology is not much to have this technology in the market competition more of a killer move.