Does Apple TV support H.264 CABAC?

Hi!

http://www.apple.com/appletv/specs.html writes:

<pre>H.264 and protected H.264 (from iTunes Store): Up to 5 Mbps,
Progressive Main Profile (CAVLC) with AAC-LC audio up to 160 Kbps
(maximum resolution: 1280 by 720 pixels at 24 fps, 960 by 540
pixels at 30 fps) in .m4v, .mp4 and .mov file formats</pre>

H.264 Main Profile specified, that CABAC must be supported:
http://en.wikipedia.org/wiki/H.264

So does Apple TV really support CABAC or only CAVLC? In this case Apple TV implements only baseline or extended profile, not main.

best regards
Andreas