>> Dear John, all,
>
> John Lazzaro wrote:
>> Just noticed a few days ago that the Final Committee Draft
>> of MPEG-4 Version 2 is now available to the general public:
Thanks for the posting, very interesting reading, a few quick
comments/questions:
> To conclude, I4d like to invite anybody interested in these ideas to get
> in contact with me - and I4ll try to provide any assitance possible for
> further activities related to HILN transcoding, synthesis, etc. ...
The simplest format to transcode to HILN might be SDIF:
http://www.cnmat.berkeley.edu/SDIF/
Eric's actually done some collaboration with the CNMAT folks in using
SAOL to implement SDIF, so he'd be in a good position to comment on
how practical it would be ... I guess the mental model I have is that
if I'm Nokia or Motorola, I'm never going to put Structured Audio in
a cellphone to do applications like "custom ringing" or "synthesized
call-waiting background music", because it would force the inclusion
of a floating-point unit into the phone. But HILN seems to be a much better
fit for a handset's CPU ... and probably makes more sense than putting
MPEG-4 AAC in the handset and streaming high-quality music also.
> Yes. MPEG-4 Version 2 (an extension of V1, formally "Amendment 1")
> contains no changes related to the Structured Audio Tools in V1.
Just out of curiousity, was adding a Structured Audio section to
to part "6.4 Back Channels" considered and rejected, or did the
whole topic never come up in the meetings? Looking though this
section, subpart 6.4.2.2 Back-channel stream for TTSI, basically
implements a set of "tape-deck controls (play, stop, fast-forward,
rewind)" for the Text-to-Speech system, when I came across this
section, I was expecting to see a "Back-channel stream for Structured
Audio" when I turned the page ... but of course it wasn't there.
--jl
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