Originally Posted by Gary Murrell
3 HD-SDI inputs are a must for videophiles, if Lumagen comes out with a Radiance with 2 or 3 HD-SDI inputs I will buy it, simple as that
I'm curious, when you mod a Blu-Ray player for HD-SDI, do you get 4:2:0 or 4:2:2 out?
If you're getting 4:2:2 out, what's the advantage of HD-SDI, purely from an image quality standpoint? (I realise HD-SDI is a more robust connection)
As for a video processor wishlist? These days, a VP is becoming less necessary, and I find it hard to justify that kind of money. But, my wishlist would beConstant audio delay.
With some (all?) VPs, the processing delay is dependant on the input signal. Find what the slowest is (60Hz?) and adjust all inputs to match. Specify the exact audio delay required. If it's supported, read the display's lip-sync correction data and factor that in as well. (I don't know what exactly the HDMI lip-sync feature supports; can it actually control an AV amp's delay setting? If so, do that too)Support film reclocking.
Strip 3:2 pulldown from NTSC content and output it at 24Hz. Slow down PAL from 25fps to 24Hz and resample audio. (with optional pitch correction) HTPCs can do this, why not VPs? (I believe if you're outputting analogue audio, you can actually slow down PAL audio without resampling/quality loss with some soundcards that support custom output rates)
I'm not sure if this is a PC-only issue, but I've been told that Blu-Ray should actually be played back at 24.000Hz instead of 23.976 if you want bit-perfect 48kHz audio. (my understanding is that you either have the sound slightly out of sync at 48kHz, or have to resample it if you're playing at 23.976) If that's the case, also support speeding up Blu-Ray to 24fps. Again, HTPCs can do this no problem.True Passthrough.
Two different game modes would be nice. One that is a complete passthrough with zero additional delay (or at most 16ms) and another that supports scaling/deinterlacing if necessary. (1080p in > 1080p out would have no delay, 720p in > 1080p out would have the scaling delay, but bypass things like noise reduction)Matrix Switching.
Two video outputs that can output either the same thing on both, or something different on each. Independent output settings for each display. This would basically mean it's two VPs in one though, so more realistically it would have two mirrored outputs, possibly allowing each to have their own resolution.None of that 4:2:2 crap.
Every stage of the image processing should be done in 4:4:4, keeping the full resolution from sources. It was obvious on a 17″ CRT, it's just as obvious on my 120″ projection screen, with Lumagen and DVDO processors.
Yes, MPEG video is typically 4:2:0, but computer/game/OSDs are rendered in 4:4:4 and the quality loss is unacceptable given the price of some of these VPs.At least 16-bit internal processing.
It's my understanding that you need to have at least 16-bit internal processing to avoid rounding when converting 8-bit YCC sources to RGB, and 32-bit FP if you're doing any processing in linear light. With the deep colour spec supporting 16-bit, why not make use of it?
I've seen posterisation caused by both Lumagen and DVDO VPs on CRT, so it's definitely not enough precision yet. (note: this may not be an issue with most/all digital displays, as you could send them a perfect signal and it'd probably end up posterised to some degree)
Obviously have some good dither algorithms for when the output is anything less than 16-bit.Full 3D LUT calibration.
If we're wishing, it will support a USB (or RS232) connection to various popular meters and do a fully automated calibration with as much precision as possible. It won't just measure red/green/blue and greyscale in 10 steps. It'll go through a whole range of hues/saturations to map out the display's linearity and then correct for it as much as it possibly can, with you being able to specify the target beforehand. (NTSC, PAL, HD co-ordinates, custom. x.x gamma curve, custom curves etc.)
Dreaming a little less, perhaps it would require a PC hook-up to either its own application or something like CalMAN. (as CalMAN already has the meter support there, and automation features)Audio Output
. Maybe it's just me, but I'd find it useful to have at least a stereo output jack from a VP, or even a 7.1 analogue output. Receivers are becoming more like VPs, why not make VPs more like receivers? Use whatever amplifiers you wish for driving the speakers, have the VP do all the audio decoding as well as video.Make it simple.
The interface should look nice, options should be clear. The remote layout should make sense to anyone that isn't sitting next to an opened manual.
I can cope with VPs just fine, but they're not the most user-friendly devices out there. It's just nice when the user experience has some thought put into it, as well as all the technology running in the background. The EDGE is a good step towards this I feel.Curtain.
Just to keep Joe quiet.
That's all I can think of off the top of my head.