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From: paul@frcs.UUCP (Paul Nash)
Newsgroups: comp.lang.c,comp.lang.fortran,comp.dsp,comp.periphs,comp.sources.wanted,comp.music
Subject: Video and Audio Compression (software and hardware)
Message-ID: <331@frcs.UUCP>
Date: 27 Jan 91 09:43:33 GMT
Followup-To: poster
Organization: Flagship Wide Area Networks (Pty) Ltd
Lines: 29


I need as much information as I can lay my hands on about video
and audio compression.  I am involved in a project to compress
TV-quality video and speech-quality audio for broadcast transmission
on comparitively slow-speed (9600 - 19200 bps) digital links.

Ideally, I would like to find a set of algorithms that I can 
implement in software, with the option of adding hardware
compressor/decompressor boards to gain speed at those sites
where speed is important.  For those sites where the users 
are happy about a delay, the software should use a compatible
algorithm.  The head-end station would probably use hardware
compression from the outset, if hardware and software are
compatible.

I realise that different techniques would be required for
video and audio.  Please feel free to respond about either or
both, if you have any ideas (including tricks for audio
modulation, perhaps).

Unfortunately, our newsfeed is erratic at times, and I don't
get all the groups that I have cross-posted to.  Please reply by
mail, and I will summarise to the above groups if there is much
information and any interest.


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Paul Nash			    Flagship Wide Area Networks (Pty) Ltd
paul@frcs.UUCP				...!uunet!ddsw1!proxima!frcs!paul