Originally Posted by melgross
BD is 1080p. That is the only hi def rez it uses. Yout Tv might scale it down if it can't do that.
I'm sorry, I can't believe your comment instead of the official BD website. If you can give me a link or something to support that I'd appreciate it.
As I said, BluRay may be producing everything in 1080p now - mainly because it wants to show that it is THE BEST quality you can get - but it's not part of their standard. I even quoted the paragraph.
(edit: 1080p is not a requirement as part of their standard. Other HD is quite acceptable)
Some companies may be using HDCP on their hi def broadcasts, but many are not right now.
I can't swear Apple isn't using it, but it doesn't seem likely.
Fair enough. My comment was an attempt to work out why HD is available on AppleTV but isn't offered on iTunes generally, the copy protection issues seemed to be a good reason (whether HDCP or not), but perhaps there is something else.
I can't remember if you took a guess at that - any thoughts?
As far as compression goes, I'll repeat my statement, but explain a bit more. I'm speaking about compression over and above what is in the format.
Just like DVD Mini, and just about all the other formats, broadcast and others, there is compression built into the standard, and is done in the camera itself, or later in the rendering process.
The amount of compression is usually not viewable, as that is the design.
Compression after the fact is viewable. That's the compression I'm speaking about.
Okay you're talking about concatenation errors - ie: having 2 separate compression systems used on a source can potentially severely reduce quality.
That kind of makes sense then...
ie: HDCP is valid on the first generation compressed file.
After all, the movie studios will be creating a 1st generation file, they usually won't be compressing their compression. Thus HDCP is most likely on 1st generation compressed movies.
Now back about 10 posts you said that the AppleTV couldn't use HDCP because it was a re-compressed version. In your last post you said it was possible AppleTV was using it, but given almost no-one is using it so far this is unlikely.
Were you saying before that Apple compression is 2nd generation (and thus has concatenation errors etc) and is not permitted to have HDCP? And are you saying that HDTV broadcasters (who compress more highly than Apple HD does) will be able to use HDCP or won't?