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Autosensing inputs.

3 replies [Last post]
Silvio Bacchetta
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Joined: 25 Oct 2007

I serve as EIC in a studio with a 4 M/E Kahuna. A typical show output is 1080i and mixes sources of any kind: usually two HD external feeds, nine or ten SD feeds, HD cameras, HD graphics and a lot of SD stuff, sometime in 16:9 and sometimes in 4:3. The Kahuna is great in handling this, but since there is no fixed scheme for external feeds, I have to change the source configuration quite often.To minimize anything that could go wrong, I would greatly like a sort of autosensing input configuration, much like the way the Evertz multi monitor display and DAs do. I think this can be implemented using VPIDs. At least, HD/SD could be discriminated, regardless of aspect ratio.

Any idea if Snell & Wilcox is planning this feature?

Chris Schmidt
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Joined: 5 Oct 2005
(also posted at Kahuna Club): It's also pretty simple to build macros which change the inputs in question to the format/aspect ratio you want. Although the Source Standard and Position/Aspect controls apply to physical inputs (i.e. before the crosspoints), you could still put the same source on more than one crosspoint, label them (for example) Rem(ote)1 16:9 and Rem1 4:3, then put them on buttons, then attach those Source Standard/Position/Aspect-changing macros to those buttons. So, to the TD the different standards appear as different sources, and he can preset the correct ones. You couldn't use them at the same time, of course, since it's really all the same source... This is quite a common problem in this part of the world, where public broadcasters are producing 16:9, but frequently get last-minute feeds whose aspect ratio is sometimes only discovered to be "wrong" shortly before air time. They burn a lot of ratio-converters to deal with this. Chris
Silvio Bacchetta
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Joined: 25 Oct 2007
This way it makes sense to me, I didn't think about an input delay. Thanks for the explanation.
kschneider
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Joined: 18 Aug 2005
I don't know if we will see auto sensing inputs in Kahuna. By telling each input up front what format it is, Kahuna can do all the processing it needs to do within 1 frame. Auto sensing would add more delay since it would take time to figure out what format the signal is that's coming into that input. When I press a crosspoint button I don't want the director to start saying "I said..." before it switches glitch-free. Whether or not the engineers come up with a way of doing this is anyone's guess. They have already done some pretty amazing things with Kahuna as it is and who knows what those miracle workers still have up their sleeves. Auto sensing is fine for multi-viewers and DA's since they don't need to be frame accurate or necessarily switch without a glitch. Cheers, -= Ken =-