Apples H.264 Encoder improved ?

[CruNcher]

As i wandered around the net i stumbled over this stream encoded with
CoreMediaAuthoring 677, CoreMedia 420.17, i386

and it is High Profile ? so did Snow Leopard also came with a big Encoder update ?

Format profile : Apple TV
Codec ID : M4VH
File size : 40.4 MiB
Duration : 1mn 15s
Overall bit rate : 4 474 Kbps
Encoded date : UTC 2009-09-23 15:40:24
Tagged date : UTC 2009-09-23 15:44:33
Writing application : CoreMediaAuthoring 677, CoreMedia 420.17, i386

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 15s
Bit rate mode : Variable
Bit rate : 4 217 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.191
Stream size : 38.0 MiB (94%)
Title : Core Media Video
Encoded date : UTC 2009-09-23 15:40:24
Tagged date : UTC 2009-09-23 15:44:33

[Ritsuka]

CoreMedia is the new apple's toy for video. But it's impossible to use it outside the presets in QuickTime X yet, so I didn't bother to test it.

[CruNcher]

Hehe i thought something like this actually first i thought it could be CoreCodecs H.264 Encoder ;) due to the the "CORE" naming convention but then i remembered that Apple also uses it for many of their OS Components (also of course Format profile : Apple TV Codec ID : M4VH) ;).
I tried to find a changelog or some description in any form like a Developer API no luck yet but definitely they enhanced the Profile support, maybe someone here can link me to some information :)