DVR upgrade HD-SDI or HD-TVI

[bgd]

I am planning to upgrade my existing Cop Security 16 channel Inspire Blue DVR which alterEgo (thanks again alterEgo) helped me setup a little while back with something newer but I am thorn between different standards and find it hard to choose between HD-SDI and HD-TVI.

I have been looking at Vectus G series HD-SDI and Hikvision / Dahua HD-TVI 8 channel DVR's and wonder what would be your recommendation.

My existing cameras are not great so will need to replace these too (Vista, Genie and Ganz 600/700TVL). Looking at HD-DSI and HD-TVI camera prices it seems the HD-SDI are much more pricier and not many models available when compared to TVI's. Is there a reason for this as I understand the image quality is very similar, perhaps chipset price in HD-SDI? 

I already have good quality RG59 + power cabling in place so this should not be an issue when upgrading to the new system whatever it is.

Any input on above DVR's and reasonably priced cameras would be greatly appreciated. 

Edited April 12, 2016 by bgd

[sixwheeledbeast]

I rate the Vectus G TBH, the new model is hybrid so you can replace the DVR now and then replace each camera as required later.

 

As for the differences between HD over Coax:- HD-SDI is digital, others (AHD/CVI/TVI) are analogue. Only HD-TVI can offer up to 1080p of the analogue options.

However, SDI being digital has a lower transmission distance compared to TVI. CVI is proprietary so I wouldn't recommend.

[Lwillis]

FYI...Dahua is HD-CVI which is rate highly.

id stay away from SDI as its a dead format and ive had nothing but issues with it- cameras dropping out on short cable runs, a 100m max limit without a booster the list goes on. 

CVI however will do over 100m on coax - 300m IIRC?? and more on cat 5 with balauns.

TVI is hikvisions format, same as CVI , havent used it myself but know a few lads that do, cant say ive heard of any major issues, except with firmware on DVRS. 

[bgd]

Thanks both.

I thought CVI had lower quality image when compared with SDI and TVI?

Please forgive me but can AHD cameras be used with SDI DVR?

I am not worried about cable length limitations as the runs as short max 25-30m.

Edited April 12, 2016 by bgd
Additional info

[sixwheeledbeast]

I would disagree, I would avoid CVI and use either TVI or SDI. I prefer SDI myself.

Never had any issues with SDI on good coax, can have issues on CCA tho.

Yes as my post above regarding quality, but it will depend on the camera.

They only work with there compatible equipment, some can do multiple formats.

[bgd]

Sorry, are you saying that AHD cameras (being analogue) will work on an HD-SDI hybrid DVR that also support analogue?

Thanks

[sixwheeledbeast]

It will depend on the DVR.

From memory the Vectus will do D1/AHD/SDI on any channel.

[Lwillis]

Not sure where this lower resolutions on CVI is coming from 

I've fitted loads of 1080p cameras on HDCVI. 

SDI is just **** IMO

[sixwheeledbeast]

It appears there are 1080p cameras available in CVI.

I was informed CVI in it's design couldn't do more than 720p and was lossy, maybe this has changed.

Still it's proprietary so your stuck with Dahua if you go that way.

All the CCTV manufacturers claim there protocol is better, they all have pros and cons, (cost / transmission length / picture quality).

[bgd]

Based on my own research through Google I am leaning towards HD-SDI even though the equipment is more expensive than TVI/CVI. Once upgraded I will not replace it for a few years and by then there will be a few more standards to think of ;-) Don't fancy IP based solution for now.

If I can run reasonably priced AHD 1080P cameras on Vectus that would fit the bill for now unless someone can recommend HD-SDI cameras that are not too expensive (1080P)?

Edited April 12, 2016 by bgd