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Topic: Equipments Need to upgrade to Digital.
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Dave Macaulay
Film God
Posts: 2321
From: Toronto, Canada
Registered: Apr 2001
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posted 10-23-2015 07:37 PM
With Barco you could use a 10s for a 35' 2D screen but I would recommend a 12C for the larger chip and improved contrast if the price is not too much of a barrier. These are air cooled and avoid the complication of liquid cooling. A CP2020 would be oversize, the 2210 would handle 2D. Personally I wouldn't recommend a non-xenon projector but they are also an option (NEC and Barco, I don't think Christie has one (yet?))
For top movable masking you need a 2:1 lens and all makers should have lenses that will work for side movable masking as well: the zoom range needed is around 2:1 - 2.6:1.
3D: If you plan on going 3D then things change, and it depends on 3D type. 3kW is marginal for simple (real-D Z-Screen or MasterImage wheel) silver screen systems but you'd want minimum 4kW lamp for Dolby 3D or active glasses systems. The Real-D XL (250+ seats, I believe) or the MasterImage Horizon (more $$$) should be OK with 2kW.
Server - Dolby is winding down their DSS server line and will only sell their "Doremi" servers soon. I would not recommend getting a new Dolby DSS server unless you have a strong reason (like a multiplex with other screens all using Dolby DSS servers).
As far as IMB or server... an IMB (these still require an external server) allows higher frame rates and better color in 3D compared to a "traditional" server with a dual SDI connection to the projector. The server/IMB systems cost more but do not require the expensive "Enigma" decryption engine in the projector so the real difference is not as much.
The "internal" servers - Christie, Dolby/Doremi, GDC, or Barco - all feature HFR and 4:4:4 color plus the Barco ICMP extends the possible frame rate even higher, I think. All of them have their advantages and drawbacks.
For video scaling some projectors (not all) have DVI inputs, SDI input projectors certainly have SDI inputs but these will be dedicated to the cinema server, and I believe the IMB/IMS/ICMP servers all have open SDI inputs plus HDMI and/or DisplayPort inputs. The allowable video formats are usually limited... but HD 1080/60p will always be allowed so any scaler/switcher that outputs that will work OK.
Note there are some oddities to think about if you plan on a lot of alternate content use. Make sure the system you choose has the inputs you need - ie some smaller projectors do not have DVI inputs, different IMBs and IMSs have different input options, and the Barco ICMP disables the DVI inputs on a projector it's installed in with the internal signal path they would use reassigned to the ICMP's DisplayPort inputs. You can use the server's internal audio decoding of HDMI and DisplayPort inputs to the standard 5.1 digital output but this can be problematic with some sources - you can usually get 5.1 and almost always get a 2.0 L/R signal but results are unpredictable especially with Blu-Ray. An external audio decoder that can handle the various digital audio formats gives more flexibility.
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