Steven_W Posted March 2, 2015 Share Posted March 2, 2015 I've got several installs coming up with HD kit. I've installed HD-SDI using Luxrite kit which has been fine, but it's super competitive now with suppliers, I have 4 or 5 of them with similarly specced kit, but I want to only use one supplier that is competitively priced, robust & reliable. I'm looking at the "Alliance" tribrids from MIECCTV (they can take a 12TB eSATA hard drive and analogue & HD-TVI cameras with 2 IP cameras). They seem good spec, cameras 1080p 2mp 2.8mm to 12mm varifocal lenses at a great price. Anyone any opinion on SDI versus TVI and what supplier to use? I've also had quotes from Systemq, Aban technology, CCTV direct & Y3K, MIECCTV come out cheapest. Quote Link to comment Share on other sites More sharing options...
LuxRob Posted April 8, 2015 Share Posted April 8, 2015 (edited) Hi Steven, I hope you are well. I have only recently returned to the forum so would have liked to reply sooner. My understanding on the difference between HD-SDI, CVI and TVI is as follows; CVI: Live = 1080P Real-time Recording= 720p 12fps Playback = Single Channel Signal = analogue TVI: Live = 1080P Real-time Recording = 1080p 12fps Playback = Single Channel Signal = analogue SDI: Live = 1080P Real-time Recording = 1080p 25fps Playback = All Channels Signal = Digital Do to sum up, HD-SDI stands for (High Definition, Serial Digital Interface. I feel TVI and CVI are more gimmicks created of the back end of HD-SDI. TVI was created by Hikvision which can be run using both RG59 or CAT5. CVI was created by Dahua will lesser quality and more restrictions than TVI. SDI is true digital. You are restricted to use only RG59 or shotgun to around 100m runs depending on the quality of cable. TVI and CVI will not work with HD-SDI systems. So if you purchase a very cost effective "1080P" TVI camera, you HAVE to purchase a TVI DVR for it to work. So it would seem CVI and TVI were created by some of the bigger players for them to have some sort of control on this section of the market, fair enough. SDI is the best in terms of performance i would say but i feel TVI and even CVI will be handy on jobs where re cabling is not an option perhaps. Again, do not take this for complete fact, but i have done my own research and used different units in the past, the above is what i found. In relation to the Alliance Tribrid unit, it would seem you are restricted on what channels can be analogue or TVI etc. Luxrite offer a UNIVERSAL VECTUS DVR which will support analogue or HD-SDI in ANY channel, in ANY variation you want, so a full hybrid. ###LINK TO EXTERNAL REMOVED### Hope this helps. Edited April 8, 2015 by sixwheeledbeast Quote Link to comment Share on other sites More sharing options...
Lwillis Posted April 8, 2015 Share Posted April 8, 2015 CVI can handle longer cable runs than SDI without repeaters or loss of image quality. Quote Link to comment Share on other sites More sharing options...
Amps Posted April 8, 2015 Share Posted April 8, 2015 Hi Steven, I hope you are well. I have only recently returned to the forum so would have liked to reply sooner. My understanding on the difference between HD-SDI, CVI and TVI is as follows; CVI: Live = 1080P Real-time Recording= 720p 12fps Playback = Single Channel Signal = analogue TVI: Live = 1080P Real-time Recording = 1080p 12fps Playback = Single Channel Signal = analogue SDI: Live = 1080P Real-time Recording = 1080p 25fps Playback = All Channels Signal = Digital Do to sum up, HD-SDI stands for (High Definition, Serial Digital Interface. I feel TVI and CVI are more gimmicks created of the back end of HD-SDI. TVI was created by Hikvision which can be run using both RG59 or CAT5. CVI was created by Dahua will lesser quality and more restrictions than TVI. SDI is true digital. You are restricted to use only RG59 or shotgun to around 100m runs depending on the quality of cable. TVI and CVI will not work with HD-SDI systems. So if you purchase a very cost effective "1080P" TVI camera, you HAVE to purchase a TVI DVR for it to work. So it would seem CVI and TVI were created by some of the bigger players for them to have some sort of control on this section of the market, fair enough. SDI is the best in terms of performance i would say but i feel TVI and even CVI will be handy on jobs where re cabling is not an option perhaps. Again, do not take this for complete fact, but i have done my own research and used different units in the past, the above is what i found. In relation to the Alliance Tribrid unit, it would seem you are restricted on what channels can be analogue or TVI etc. Luxrite offer a UNIVERSAL VECTUS DVR which will support analogue or HD-SDI in ANY channel, in ANY variation you want, so a full hybrid. ###LINK TO EXTERNAL REMOVED### Hope this helps. LuxRob nice one! Quote Link to comment Share on other sites More sharing options...
Adi Posted April 8, 2015 Share Posted April 8, 2015 +1 to Rob, I've been wanting to find out the above for a while now. Quote I really can't be ar**** with it anymore. Link to comment Share on other sites More sharing options...
Lwillis Posted April 8, 2015 Share Posted April 8, 2015 What are the extra restrictions of CVI over TVI? As far as I can see CVI give greater cable runs, also offers recording in 1080p can be run on cat 5 or rg59 SDI seems like the one with more issues (from experiance) than CVI. Although I have not use TVI. Quote Link to comment Share on other sites More sharing options...
JaysonKandiah Posted April 8, 2015 Share Posted April 8, 2015 + 1 with Rob! SDI is generally more robust and although costs are getting more and more competitive we see more and more installers adopting HD-SDI without any queries. There's so much out there though, HD-TVI, CVI, AHD the lot, it's just getting harder for installers to make a solid choice. Quote CCTV Distributor of AcuraPRO and Samsung CCTV Equipment - Trade Customers: www.acurasystemsdirect.com Link to comment Share on other sites More sharing options...
Neutech Posted April 12, 2015 Share Posted April 12, 2015 Luxrob I don't know where you got your information on HDCVI from but its incorrect, maybe you should actually do some research on your competition instead of using your "findings" of CVI / TVI to upsell your HDSDI Products I have installed HDSDI and rate it but I also install a lot of HDCVI which is 25fps @ 1080p, I have no issues with either apart from the cable limit on the HDSDI Your comparison of CVI being lesser quality and more restrictions than TVI / SDI are warranted on what ? HDSDI 1080p 25fps 100m cable on RG59 HDCVI 1080p 25fps 700m on RG6 500m on RG59 300m on CAT5e Control over COAX I don't see the lesser in the above? I can tell you in the real world I have a few HDCVI running at 418m on RG59 so I am happy with the claims on cable distance Just for comparison on your UNIVERSAL VECTUS DVR the dvr I use from Dahua is any channel HDCVI or Analogue or IP so true Tribrid @ 1080p I cant comment of TVI as I don't use Hikvision equipment Quote Link to comment Share on other sites More sharing options...
Adi Posted April 12, 2015 Share Posted April 12, 2015 I'll take the +1 back then. Quote I really can't be ar**** with it anymore. Link to comment Share on other sites More sharing options...
james.wilson Posted April 12, 2015 Share Posted April 12, 2015 Is the analogue bit correct though? Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
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