Originally Posted by cybersoga
There is no HD-DVD player other than software playback on a PC, that bypasses all interlaced processing. HD-DVD players ignore the film flags. The problem with interlaced processing is that it is not 100% perfect at reconstructing film frames every single time and there is the matter of the chroma bug rearing it's ugly head due to interlaced chroma up-sampling algorithm being used. Look at the jagged edges on the new Warner anti-piracy logo on Toshiba's best HD-DVD player vs Sony's best BD player. Sony's BD players don't use any intermediate interlaced processing for 24p mastered discs, they are progressive all the way.
any insiders care to comment?
Happy to comment
First, I want to make sure we don't mix topics here. What is encoded in HD DVD is progressive and is not subject to interlace processing. As otherwise, the identical VC-1 stream used on BD from Warner, would suffer which you agree it is not. So what you are asking about is how the progressive stream on disc is output by the player and of course, this is an implementation issue, not a format issue. The picture here, pun intended
, is kind of complicated so let me explain with some examples.
First, PC players are not the only ones doing it right. Xbox 360 outputs proper progressive signals and has no chroma bug either
. You imply that all BD players output proper 1080p signals because of the encoding method but that is not the case. The Panasonic decoder outputs 1080i and then feeds this signal to a (now obsolete) Marvel AVC2510 to convert it back to progressive. The Marvel part is a low quality de-interlacer as compared to the much nicer Reon part used in Toshiba XA-2. As such, it fails on many sequences like in MI3 which the Reon handles properly. More importantly, the Reon is very programmable so other things can be done to improve its performance in the future. The Marvel part is discontinued so it is hard to imaging Panasonic would get any support to improve its performance in the future.
And there is nothing inherent about HD DVD that makes it difficult for people to build players without a chroma bug. We have done it. I am hopeful that others will do the same (or upgrade their firmware to fix it).
As to Sony and its Pioneer brother, they suffer in reverse. Their do a low quality conversion from interlace to progressive. So if you play any video sourced content, you are not going to see anything as good as Toshiba XA-2. And for that reason, they may not play DVDs as well as the XA-2 either.
BTW, we have heard that the LG combo player outputs 24p with latest firmware with HD DVDs. I don't own one so can't tell for sure. But if so, you can add that to the list of players which output progressive properly from HD DVD.
All of this shows that we are talking about implementation factors, not format specifics. If you use a decoder which outputs 1080i, whether the source is BD/HD DVD, then you have an issue on how to output it back to progressive. The content on disc is progressive in both formats so the best course is to decode to progressive, and then output that.
Per my note earlier, for players which are programmable, I hope the manufacturers take the right steps to make them process the original video properly and you can bet that we put constant pressure on folks to do exactly that.
Now I really have to go and clean up the garden or I will be in serious trouble at home and my AVS privileges suspended for good