Topic: Psychovisual RD & Psychovisual Trellis & Trellis & Deblocking...
I found this part of your forum which seems open to general discussion. When you have a few minutes, could I please bother you for your opinion about what these settings (enhancements?) do and how they work?
I know the default setting for Psychovisual RD is '1' I've read many differing opinions about how very subjective this is. Also with Psy Trellis. The default there is '0', however when a person tunes for 'Film', that setting goes to .15. Some people use .20. Now, from what I understand, Psy Trellis has something to do not so much specifically with preserving detail, but more with giving the 'impression' of more detail (or something like that...)
My understanding of Trellis itself is a bit more vague. I really don't understand the difference between trellis 1 and trellis 2, except that whatever it does, I think with '2' it does it more continuously or comprehensively, I'm not sure. I believe that you are supposed to use it, but I don't really understand what it does.
Also, I guess this is related, but Deblocking for tune--film is -1.-1. But, some people who SEEM to be really experienced at encoding and want to preserve a lot of detial use -2,-2 or even -3,-3.
Now, generally speaking for myself, this is always going to pertain just to HD. And, for my personal taste, I like a sharper, more detailed picture for the most part (the exception is MAYBE when a film is EXTREMELY grainy, like Criterion's Blu-ray of 'THE THIRD MAN' for example, which looks like it is bathed in snow, BUT it does indeed have amazing detail - so, that circumstance is a bit of a quandary to me, but I think I'm leaning toward more detail) So, I generally set encodes (or re-encodes) for at least tune--film. I'm currently trying deblock,-2,-2 to see how I like the results. I've only done one so far, the new Blu-ray print of 'THE ART OF WAR', bringing it down to fit on a BD25. The result looked really good, very defined. I also use Trellis 2 and Psy Trellis .20 as a rule because it generally LOOKS like it comes out very detailed and sharp.
So, since you are VERY experienced at this, I just wanted to get your opinions about how these particular settings work and how you personally feel about them, if that would be okay.
Oh, BTW... I also use the setting that YOU suggested (and I THINK is incorporated in Hybrid, if I'm not mistaken) and that is setting the qcomp to .5 instead of the default .6. I remember you saying that you preferred that. In doing some further reading, it appears that that would take more bits from fast moving scenes and place them in more calm, static scenes, where I ASSUME the idea is that it would be more noticeable there.
I KNOW that all of these are somewhat interrelated with each other, but it would be nice to understand better how they work together. BTW, I don't care anything about smaller file sizes or getting the most out of compression, which I know some of these things do help to do. I almost ALWAYS am doing full Blu-rays on BD-25s, or in some cases, to force a re-encode of a bad encode. So, I GUESS from what I understand, the bit rate will always be reasonably high (which may make a lot of this pointless, I don't know )
And, I DO remember you saying a number of times that the settings are not as vital as the filters one uses before encoding. You gave me a LOT of very helpful advice in using AVS to alter the sharpness, contrast, and brightness in some cases which REALLY helped!
Thank you so much for whatever insight you can give me.