Hi Everyone,
John Wawrzynek's giving the sfront/MP4-SA talk next Tuesday at
Interval Research in Palo Alto (northern edge of Silicon Valley), here
is the announcement in case any locals on the list want to attend,
--john lazzaro
Date: Tue, 14 Sep 1999 17:54:51 -0700
To: signals-talk@interval.com
From: Malcolm Slaney <malcolm@interval.com>
Subject: SigComp talk: What comes after MP3?
What comes after MP3? Of course, MP4 (i.e. MPEG 4). One of the more
interesting parts of the MPEG 4 standard is Structured Audio (MP4-SA),
an effort led by Eric Scheirer at the MIT Media Lab. John Wawrzynek
and John Lazzaro have been working on compilation tools for MP4-SA,
and will be talking about them at the next Interval SigComp lecture.
John and John's compiler automatically builds a efficient synthesis
engine (in the "C" language) from an MP4-SA file. An MP4-SA file
specifies not only the notes, but also the algorithm needed to create
each sound. Moreover, an MP4-SA stream is normative -- it will sound
identical when played on any compliant decoder, making it suitable
for real-world content production and delivery.
The details of the language and John's work can be found at
http://www.cs.berkeley.edu/~lazzaro/sa/index.html
Please RSVP to dsmith@interval.com if you are planning to come to this talk.
More details about Interval's SigComp lecture series can be found at
http://web.interval.com/sigcomp/
See you at Interval at 11AM (be prompt please) on Tuesday September 21, 1999.
-- Malcolm
Please Note Day Change!!!
****** Tuesday, September 21, 1999 *********
Interval Research (Page Mill Conference Room)
11AM - 12 Noon
Structured Audio: Algorithmic Sound for the Internet and Beyond
John Wawrzynek
Computer Science Division - EECS, University of California at Berkeley
The upcoming MPEG 4 (MP4) Audio standard includes the unique
Structured Audio (SA) format. Unlike traditional audio formats like
MP3, sound in MP4-SA is not encoded as a compressed version of audio
samples. Instead, an MP4-SA file is a computer program in the SAOL
language, that when executed by the decoder generates the audio
stream.
When viewed as a Kolmogorov compression system, lossless compression
ratios of 100 to 10,000 are possible with MP4-SA, for certain types
of music. Because music under production is naturally represented as
a collection of algorithms and control data, MP4-SA also works well
for applications such as collaborative music production over the
Internet.
In this talk, I'll describe the standard (which was primarily
developed at the MIT Media Lab by Eric Scheirer) and detail research
in my lab on (1) compiler-based approaches to fast MP4-SA decoding
and (2) physical musical instrument modeling in SAOL.
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