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Why does Apple support new codec like h.264 with HE-AAC v2 in AppleTV and Ipad? Ipad support HE-AAC v2 on audio so why not on video (h.264 with HE-AAC v2)?
I don´t want Dolby ProLogic - I want real 5.1 surround sound:-) Dolby ProLogic and AC3 is old - HE-AAC v2 is the future
AppleTV 2
"I don´t want Dolby ProLogic - I want real 5.1 surround sound"
not quite sure i'm understanding you?? ...AC3 IS Dolby Digital 5.1.. and AppleTV does support AC3/Dolby Digital 5.1 passthru.. so it does support "real" 5.1 surround.. as well as Dolby ProLogic II
AAC is a great, modern codec.. unfortunately though practically no AV Receiver manufactures support it..
AppleTV actually does support HE-AAC (V1).. i'm guessing v2 will be supported in a coming release.. now if you can find an AV Receiver that can actually decode that.. you'll be all set..
EDIT - yes but not for video..
Audio formats supported
HE-AAC (V1), AAC (16 to 320 Kbps), protected AAC (from iTunes Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, AIFF, and WAV; Dolby Digital 5.1 surround sound pass-through
http://www.apple.com/appletv/specs.html
Message was edited by: tmartine
Yes I know that AC3 is the same as Dolby Digital 5.1
Will/can AppleTV (or an other unit) HE-AAC v2 not be transform to pcm so a AV Receiver can play it?
What I am looking for is a powerful codecs that keep the good video and audio quality of a dvd and can be play in both AppleTV and Ipad. I really like to keep the good surround sound
but appleTV support AC3 passthru meaning that the sound quality of DVD is preserved with precisely the quality of DVD because it is the exact same unaltered audio track that is being sent to the AV receiver that is unchanged in any way..
that's why i wasn't sure where you were coming from.. if you are talking blueRay then you have a point.. DVD's audio quality, i'd say no.. it's the exact same quality as the DVD if you use DD 5.1 paththru..
Yes you are right about AC3 but does Ipad support AC3? I just what to rip my dvd once - one format for both AppleTV and Ipad. One format that almost is as good as the original.
Just like H.264/mpeg4 is a better codec then mpeg2 I what the same on the audio part. Which codec replace AC3??? If no HE-AAC v2 - then which codec?
What I said earlier will I rip my dvd collection and what to use the best codec (quality vs. file size/bitrate).
But I think that Apple need to open op more codec in their products.
Discussions regarding ripping commercial DVDs are not generally permitted by Apple.
On a more general note, you may not appreciate files created for AppleTV can have 2 soundtracks - for example stereo and AC3 passthrough.
Personally I cannot see any advantage currently encoding AC3 to something else - h264 is much more efficient than MPEG2 for video with minimal quality loss and the AppleTV/iPad specifically support h264 not MPEG2.
For audio, AppleTV/iPad will decode AAC audio and output stereo, but for 5.1 surround the AC3 soundtrack is just passed through as is unprocessed- even if you could convert the AC3 to HE-AAC v2 and output this as an unaltered bitstream very few devices at the other end would have any idea what to do with this bitstream.
All very well having efficient codecs but only when most devices in the chain actually understand them, and currently most AV kit will handle AC3 but not AAC 5.1, let alone HE-AAC v2 encoded 5.1.
AC
Better surround sound support - please:-)
