[M4IF Technotes] Is standard conform to put mp3 sound in aMPEG-4 stream ?

[AVARO Olivier FTRD/DIH/REN]

Hi Miroslav, 
> The frame() bitstream element is a fully decodable element and
> the decoder
> does not need any information out-of-band. 
> In some cases it will make a decoder job easier if there was some
> out-of-band info available 
> (like knowing sampling frequency ahead of time and set up and
> lock PLL before the actual
> data arrive).
> 
> In any case Layers I, II and III in both 11172-3 and 13818-3
> could be discriminated
> based on the in-band data (including 1/2 fs as well as
> multichannel option).

OK. So, I guess the conclusion is that the use of MP3 in the MPEG-4 environment can be made to work in a quite simple way as described in this thread and that a clarification in the standard would help to cast this in stone, ex. as a normative annex to MPEG-1 (I am sure Leonardo will be exited about the idea :-). Any taker ?
Kind regards,
Olivier