Image quality

[chuck p 0]

Does the DVR have any effect on the image quality that you would see on a monitor? Thanks

[CollinR 0]

Depends.

During live viewing it can just pass the feed through.

During playback it definately makes a big difference.

[cctv_down_under 0]

Yes, Definately, if using a DVR you are digitizing the video, but for live viewing some manufactorers offer a DSP that has little to no compression, so you do get some interlacing, but very minimal, however it will never look as good as an analogue signal of the same resolution.

 

The key factor is also the screen, it depends of refresh rates, type of screen etc etc...every DVR is different, some have live display and some dont, also some of the compression chips crop and some dont, there are several video standards...and the compression cards need to cater for all markets so you will often see cropped and interlaced video so that the one chip can handle multiple standards.

 

A lot of things affect image quality, you need to start at the begginging, IE the lighting, then into the camera, the cameras CCD ability and processing electronics, then the signal to noise ratio, then the quality of the cable can also affect it as well as the connectors, then the possibility of interference, and then the compressing DVR and lastly the display screen.

[chuck p 0]

Thanks for all the help,i was just wondering about the image quality during pass thru because of the dvr being of cheaper quality.The cameras are NUVICO NVCC-W27IR30N.