Reply To: OSSC Pro Gain Voltage / ISL51002

[M3Patterns]

That makes sense. I did not know the processing was being done as 8 bit.

I am currently running both of my OSSC Pros out to a VGA amp, so avoiding that step (and extra box) by having a voltage amp on a future revision of the Extra AV Out would be nice. If that was implemented, it would also be helpful, if feasible, to have the output voltage measured and displayed on the OSSC.

 

Would it be possible to preserve 10 bit data just in passthough modes? (Or have a fork of the firmware that has [potentially greatly] reduced functions, but be fully 10 bit?)

Alternatively, if it’s possible to have just a few initial steps be 10bit, I was thinking that there could be a color correction stage that is fully 10bit before being quantized down to 8bit. That may preserve the signal a bit better (and fit within the ADV7125) without the overhead of everything being 10bit. The existing Component to Rec.601 / Rec.709 conversion could be done as 10bit, and then there could be an option for individual RGB gain controls (since the Y / R-Y / B-Y / Y gain values do not have the ability to directly control the RGB values.) Additionally, there could also be the ability for a full 3×3 matrix of color conversion.

 

An RGB gain option and 3×3 color matrix option I would love to see implemented regardless.

 

All that being said, I still need to test if I can even see the difference on a CRT between 255 worth of values and 212 values (120 IRE) or less. I am actually currently running an OSSC Pro with over 40IRE of headroom (178 values) and I don’t see anything objectionable / noticeable after a few hours of SNES games.