Core network transmission factors hindering the development of the high-definition camera
Entry posted by stevenchan
84 views
HD monitoring due to the transmission distance of the monitoring system, the flexibility, the constraints of deployment costs is bound to Network. HD cameras as a front-end devices for high-definition monitor, will also to network.such as [url="http://www.tenvis.com/wireless-ip-camera-c-76.html"]wireless ip camer[/url]a In routine monitoring market HD cameras, HD cameras not get the comprehensive promotion of some applications, only in some areas of the industry. The reason, the core of the obstacle is its network transmission barriers.
HD cameras to get large-scale applications, in addition to passive expect network operators to make some adjustments, the more we need to take the initiative to take some of the alternatives to alleviate the HD camcorder network transmission bandwidth is not enough contradiction.
The use of advanced video compression standard
Actively using advanced video compression standard, to achieve the best image quality with the least amount of data, at the same time through a combination of image coding technology with intelligent technology, local coding, high-definition image transmission can be reduced to a considerable extent by the need network bandwidth. The mainstream compression format, there are three, respectively, JPEG, MPEG-4, H.264. JPEG is the compression of a single frame images, the effect of a single picture, but the larger network bandwidth resources; MPEG-4 and H.264 continuous compression between frames. Which are currently the most popular compression format highest compression efficiency of the H.264, H.264 compressed video data in the network during the transmission require less bandwidth.
Improve the front-end caching technology
Rational design of front-end caching technology to ensure the device image is not lost. HD camcorder itself data storage capacity is limited, depend on the communication transmission and back-end storage devices. By rational design of the front-end cache mechanism, to prevent the loss of data communications failure. For example, the design of the high-definition camera system, optional on-board memory or other storage devices, and support for working offline. Network abort, to temporarily store data locally, and so the network is restored to normal after the server returns. Webmaster technology can also achieve the network is temporarily interrupted when the front end of buffer until the network is restored automatically upload the video data, thereby ensuring the integrity of the video.
Provide dual-stream support
HD local video, dual-stream technology can both reduce the remote transmission bandwidth use and guarantee the local better image quality. HD cameras provide remote monitoring environment, all the way to high-bit-rate stream for local HD storage for example 720P/1080P coding all the way to low bit rate stream for network transmission, such as QCIF / CIF encoding both local storage and remote network transmission. The flexibility to choose the format of the stream according to network bandwidth, local HD storage back-end low stream network transmission. In the case of limited network resources users can get, able to ensure the stable operation of the transmission system.
To improve smart technology added value
Smart technology can improve monitoring efficiency, value it can bring more than that, through coding and intelligent analysis front, high-definition network camera embedded intelligent analysis module can grab valuable information from a source and then spread to the background, can reduce the transmission pressure truly effective transmission. HD camcorder image itself can be collected to analyze the judgment, and the alarm signal is transmitted to the back-end system, which is different from the previous smart technology to transfer images to the back-end systems and then by software analysis alarm. The conventional method needs occupy too much bandwidth and storage space, and the image signal during transmission loss exists, prone to false alarms. HD cameras all signal processing in the preceding paragraph inside the camera, the signal is the most complete, accurate rate alarm greatly enhanced, and at the same time can reduce the bandwidth.
Network HD cameras represent the future of the surveillance cameras. With the continuous development of the network, high-definition monitor is bound to usher in a broad space for development.
HD cameras to get large-scale applications, in addition to passive expect network operators to make some adjustments, the more we need to take the initiative to take some of the alternatives to alleviate the HD camcorder network transmission bandwidth is not enough contradiction.
The use of advanced video compression standard
Actively using advanced video compression standard, to achieve the best image quality with the least amount of data, at the same time through a combination of image coding technology with intelligent technology, local coding, high-definition image transmission can be reduced to a considerable extent by the need network bandwidth. The mainstream compression format, there are three, respectively, JPEG, MPEG-4, H.264. JPEG is the compression of a single frame images, the effect of a single picture, but the larger network bandwidth resources; MPEG-4 and H.264 continuous compression between frames. Which are currently the most popular compression format highest compression efficiency of the H.264, H.264 compressed video data in the network during the transmission require less bandwidth.
Improve the front-end caching technology
Rational design of front-end caching technology to ensure the device image is not lost. HD camcorder itself data storage capacity is limited, depend on the communication transmission and back-end storage devices. By rational design of the front-end cache mechanism, to prevent the loss of data communications failure. For example, the design of the high-definition camera system, optional on-board memory or other storage devices, and support for working offline. Network abort, to temporarily store data locally, and so the network is restored to normal after the server returns. Webmaster technology can also achieve the network is temporarily interrupted when the front end of buffer until the network is restored automatically upload the video data, thereby ensuring the integrity of the video.
Provide dual-stream support
HD local video, dual-stream technology can both reduce the remote transmission bandwidth use and guarantee the local better image quality. HD cameras provide remote monitoring environment, all the way to high-bit-rate stream for local HD storage for example 720P/1080P coding all the way to low bit rate stream for network transmission, such as QCIF / CIF encoding both local storage and remote network transmission. The flexibility to choose the format of the stream according to network bandwidth, local HD storage back-end low stream network transmission. In the case of limited network resources users can get, able to ensure the stable operation of the transmission system.
To improve smart technology added value
Smart technology can improve monitoring efficiency, value it can bring more than that, through coding and intelligent analysis front, high-definition network camera embedded intelligent analysis module can grab valuable information from a source and then spread to the background, can reduce the transmission pressure truly effective transmission. HD camcorder image itself can be collected to analyze the judgment, and the alarm signal is transmitted to the back-end system, which is different from the previous smart technology to transfer images to the back-end systems and then by software analysis alarm. The conventional method needs occupy too much bandwidth and storage space, and the image signal during transmission loss exists, prone to false alarms. HD cameras all signal processing in the preceding paragraph inside the camera, the signal is the most complete, accurate rate alarm greatly enhanced, and at the same time can reduce the bandwidth.
Network HD cameras represent the future of the surveillance cameras. With the continuous development of the network, high-definition monitor is bound to usher in a broad space for development.
1 Comment
Recommended Comments
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now