Thursday, February 28, 2019

Ip Camera

Basic analog and digital Branded ones Bosch, AXIS, Mobotix Biggest chinaware brand Vivotek Check out AXIS and Mobotix trend in severally country. Bosch is following up with AXIS and Mobotix. Bosch website is good in technical. Vivotek is good in hardware. Bosch and Airlive software are good. Analog camera has BNC connector (round connector). green goddess replace analog to digital? Yes is possible. Cost is 25 USD to 250USD. Can convert to BNC to RJ45 or even to Fibre. Lens affect the viewing angle from 4 MM, 6MM, 8MM, 16MM. producer is Sharp and Sony. Lens withal got differentiate into CMOS and optical crystalline lense. Optical lens consume more bandwidth.AXIS has the best CMOS lens and they can make it close set(predicate) to optical lens. MTBF- Mean time before failures. Our AP is 200,000HRS which is quite safe. Camera also have MTBF timing. Bosch have best datasheet. digital cameras is using RJ45, LAN cable. Digital have both indoor and alfresco. DVR for analog have BN C connector. 16 holes. 1 hole 1 channel. DVR is for digital camera. DVR is mostly for soho use up to 16 channels or even 32 channels = 32 digital cameras. 1 camera 1 ip address. DVR we have 1 setup box and 1 harddisk and few buttons for control. Older form of DVR is onsite recording. 2nd generation is with Lan cables so is going via IP.Can record offsite. PTZ cameras Pan Tilt Zoom.. which the lens is optical. NVR network video recording is like a NAS, up to soprano CPU power with single GIGBABIT port for connecting high resolution cameras for processing. Can connect up to 254 cameras to 1 NVR (255 ip address for Class C subnet mask). Codec is required for converting the recording for onsite. H. 264 and MPEG file version. For future, people are doing bigger and big and scalable NVR to increase the number of cameras. Raid is now up to 0 and 1. Next year will be raid 5 and raid 6. inside have 4 CPU inside 4U CPU tweet with 2 harddisk with redundant power. Software Questions to ask. 1) What is the FRAME per second? FPS. Recording for IP camera is 29FPS is good (for wired). Wireless camera is normally 3 to 5 FPS for viewing. Recording is still 29FPS for wireless. 2) Resolutions. 320 x 320, 480 x 320, 640 x 480, 1024 x 768 etc. higher resolution will consume higher bandwidth. For analog is delineate as lines. Eg HD TV has 1080 lines. 3)CODEC file type. For night vision is based on lux. 0. 5 LUX is able to see already. 1 LUX 40W of weightlessness bulbs. IP cameras do not hook on standard POE but it take POE+. AXIS strong at indoor Mobotix strong at outdoor Vivotek Outdoor and indoor Bosch Outdoor

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