[ID3 Dev] ID3v2 extensions to support audible metadata

[Chris Newell]

Brandon,

Thanks for your comments.

At 21:33 27/04/2006, you wrote:
>One thing you might consider is allowing different formats for the audio
>data.  For example, the track audio may be 44.1kHz stereo, while the
>narrative data would sound fine at 11.025kHz mono.

This is allowed although not explicitly stated - the only stipulation is that the encoding of the audible metadata must match the MIME type of the audio file.

>Also, since I don't see it mentioned, what if the track audio is encryped
>via an AENC frame?  I presume you wouldn't want this audio data to be
>encrypted as well, but in either case it should be noted in the spec.

If desired you could encrypt the audible metadata by encrypting the ATXT frame itself (in which case the frame header encryption bit would be set). I'll add a note to clarify that encryption of the track audio data is decoupled from encryption of the ATXT frame audio data.

Best regards,

Chris

   

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chris Newell
Lead Technologist
BBC Research & Development
Kingswood Warren, Woodland Way, Tadworth, Surrey 
KT20 6NP  UK
mailto:chris.newell at rd.bbc.co.uk       http://www.bbc.co.uk/rd
Tel:   +44 (0)1737 839659
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