It makes sense to use a Networked Video Server that can use Analog Cameras and compress the maga data and make it digital and then send it across to the client. I would suggest to have a look at enVigil video server
The topic of this discussion is "Network Video Storage and Megapixel Camera Technology" not IP Camera's!
The reason people are so hooked on doing Camera based storage and analytics is due to the premise that IP is the solution for moving SD/HD Video between a Camera and a storage solution be it DVR, NVR, NAS. IP has severe bandwidth, QoS and cost per channel issues when trying to move realtime HD Video across a network.
D1/VGA Camera's are causing performance issues with 720p and 1080p having 4 to 8x more data, the problems of network design and infrastructure become even more apparent.
1) Centralised Video Storage and Image Analytics will ALWAYS be cheaper than Camera based storage and analytics due to Moore's Law.
2) IP transport between a Camera and DVR has limitations that are directly impacting Video quality in terms of both Frame rate and Compression, to meet bandwidth, QoS and cost per channel targets.
3) IP Video Transport is perfect for DVR to Client, as latency and packet loss is not a real issue when reviewing a single stream of Video for review.
4) IP has a hard distance limitation of 100M, and High Frame rate, High Quality HD Video will require GB Ethernet with Cat6 Cable. Distances beyond 100M require Repeater, Routers or Fibre Optic Convertors
The traditional DVR/Camera model with point to point Analogue DVR/Camera transport and IP based Client control and review still offers the best price/performance ratio in the market today. For 16 Camera or less systems with less than 4000 sq/ft, there is simply no need to incur extra costs for an IP Camera architecture, that a) Costs more b) Is harder to Install c) Slower Frame Rates d) Poor picture quality.
NTSC/PAL in D1 is successfully servicing 98% of the installed based and over 90% of new installations. HD Camera's represent less than 150K per year world wide and technologies such as HDcctv (www.highdefcctv.org) will embrace the proven SD DVR/Camera architecture and offer better, cheaper, faster and easier solutions for deploying HD CCTV systems to 85% plus of the market.
IP is great transport and when used correctly offers many benefits but other technologies such as SDi exist for a reason as they offer inherent advantages over IP for certain applications (Uncompressed, Realtime, QoS, Cost per Channel, Low Latency, Distance, Ease of Install). SDi in particular is the backbone of the Broadcast Industries move to HD Video and the investments being made in R&D are an order of magnitude higher than IP Video for CCTV.
SDi makes sense for Camera to DVR
IP makes sense for DVR to Client
www.cradle.com
Sunday, December 6, 2009
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