From esilva@ox.ac.uk Fri Nov 17 17:33:19 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!esilva
From: esilva@ox.ac.uk (Emi Silva)
Newsgroups: comp.dsp
Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Nov17.173319.9431@ox.ac.uk>
Date: Fri, 17 Nov 1995 17:33:19 GMT
Organization: Oxford University Computing Laboratory
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Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.

Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.
Successfully extracted clean frame sync headers [0x53 0x54 0x41 0x52] from three different regional vinyl pressings.

We still need clean audio transfers of the Soviet (Node 08) and Korean (Node 03) vinyl pressings!

-- 
Emi Silva
Opinions expressed are solely my own and not those of Oxford University Computing Laboratory.
------------------------------------------------------------

From rreyes@clari.net Sun Nov 19 11:05:19 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!rreyes
From: rreyes@clari.net (Renata Reyes)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Nov19.110519.1809@clari.net>
Date: Sun, 19 Nov 1995 11:05:19 GMT
References: <1995Nov17.173319.9431@ox.ac.uk>
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In article <1995Nov17.173319.9431@ox.ac.uk>, esilva@ox.ac.uk (Emi Silva) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.
> Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.

Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro.

Top-posters will be placed in my ~/.killfile without notice.

-- 
Renata Reyes -- ClariNet Communications Corp
"When every node is whole, the channel opens."

From lmuller@mit.edu Sun Nov 19 19:03:19 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!lmuller
From: lmuller@mit.edu (Lisa Müller)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Nov19.190319.9366@mit.edu>
Date: Sun, 19 Nov 1995 19:03:19 GMT
References: <1995Nov17.173319.9431@ox.ac.uk>
Organization: Massachusetts Institute of Technology
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In article <1995Nov17.173319.9431@ox.ac.uk>, esilva@ox.ac.uk (Emi Silva) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.

On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work!

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Lisa Müller -- Massachusetts Institute of Technology
"Hardware is temporary. The signal survives."