From: malcolm@interval.com (Malcolm Slaney)
Date: Fri, 7 Apr 1995 07:51:31 -0800
Subject: Signal Processing at the Hearing Seminar
Message-Id: <abab0c4b01021004e370@[199.170.108.19]>

The CCRMA Hearing Seminar will be meeting with the DSP seminar folks for
our next meeting.  This topic comes up occasionally, what is the best way
to implement our models and do the research we want to do?

Next Thursday, Prof. Edward Lee from the UC Berkeley EECS department will
be here at Stanford to talk about his system called Ptolemy.  Ptolemy is
system which makes it easier to design and implement large signal
processing systems.  An important aspect of Ptolemy is the ability to
design real world systems, and Ptolemy provides the tools to help implement
the design.

        Who:    Edward Lee (UC Berkeley EECS Department)
        What:   The Ptolemy Project
        When:   Thursday April 13 at 11AM
        Where:  CCRMA Ballroom (Main Floor of the Knoll at Stanford)

For more information about Ptolemy, check out the following URL
        http://Ptolemy.eecs.berkeley.edu/
I've also attached an abstract for Edward's talk.

See you at CCRMA.

-- Malcolm
P.S.  Mike Cohen, an occasional Hearing Seminar visitor from UC Santa Cruz,
wrote to tell me that their speech and facial synthesis work, Baldy, will
make a short appearance on the Next Step show on the Discovery channel.
The show will be aired on April 8th 5:00 pm (That's Saturday).

P.P.S. John Middlebrooks (U. Florida) a neurophysiologist now doing some
wonderful psychoacoustics will be presenting "Listening in on the Auditory
Cortex" at the UC Berkeley Ear Club at 4PM on Monday April 10 in Tolman
Hall at UCB.





An Overview of the Ptolemy Project

Edward A. Lee
EECS Department
UC Berkeley
eal@eecs.berkeley.edu

Abstract

The ambitious objectives of the Ptolemy Project include most
aspects of designing signal processing and communications
systems, ranging from designing and simulating algorithms to
synthesizing hardware and software, parallelizing algorithms,
and prototyping real-time systems. Research ideas developed in
the project are implemented and tested in the Ptolemy software
environment.

The Ptolemy software environment is a system-level design
framework that allows mixing models of computation and
implementation languages. In designing digital signal
processing and communications systems, often the best
available design tools are domain specific. The tools must be
able to interact. Ptolemy allows the interaction of diverse
models of computation by using the object-oriented principles
of polymorphism and information hiding. For example, using
Ptolemy, a high-level dataflow model of a signal processing
system can be connected to a hardware simulator that in turn
may be connected to a discrete-event model of a communication
network.

This talk will give a high-level overview of the project
and will outline several specific subprojects.