From mmuller@titech.ac.jp Sat Jun 17 00:29:04 1995
Path: ashpoly!cascade!mxgate!coyoacan!titech!mmuller
From: mmuller@titech.ac.jp (Mateo Müller)
Newsgroups: comp.dsp
Subject: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun17.002904.8466@titech.ac.jp>
Date: Sat, 17 Jun 1995 00:29:04 GMT
Organization: Tokyo Institute of Technology Computer Centre
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Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.

Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.
Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.

Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz.

-- 
Mateo Müller
Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre.
------------------------------------------------------------

From mgirard@pacbell.net Sat Jun 17 12:42:04 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!mgirard
From: mgirard@pacbell.net (Mikhail Girard)
Newsgroups: comp.dsp
Subject: Re: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun17.124204.7057@pacbell.net>
Date: Sat, 17 Jun 1995 12:42:04 GMT
References: <1995Jun17.002904.8466@titech.ac.jp>
Organization: Pacific Bell Internet Services
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In article <1995Jun17.002904.8466@titech.ac.jp>, mmuller@titech.ac.jp (Mateo Müller) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.
> Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

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

-- 
=== Mikhail Girard ===
Dept of Electrical Engineering, Pacific Bell Internet Services
"Tape doesn't lie at 02:14. Ears do."

From fsmirnov@mit.edu Mon Jun 19 14:34:04 1995
Path: ashpoly!cascade!transat!ukc!fennimore!mit!fsmirnov
From: fsmirnov@mit.edu (Freya Smirnov)
Newsgroups: comp.dsp
Subject: Re: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun19.143404.8310@mit.edu>
Date: Mon, 19 Jun 1995 14:34:04 GMT
References: <1995Jun17.002904.8466@titech.ac.jp>
Organization: Massachusetts Institute of Technology
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In article <1995Jun17.002904.8466@titech.ac.jp>, mmuller@titech.ac.jp (Mateo Müller) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.
> Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

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

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Freya Smirnov
Tape trading list upon request. SASE required for international mail.

From sstewart@clari.net Tue Jun 20 05:19:04 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!sstewart
From: sstewart@clari.net (Sun-mi Stewart)
Newsgroups: comp.dsp
Subject: Re: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun20.051904.4595@clari.net>
Date: Tue, 20 Jun 1995 05:19:04 GMT
References: <1995Jun17.002904.8466@titech.ac.jp>
Organization: ClariNet Communications Corp
NNTP-Posting-Host: clari.net
X-Newsreader: Netscape 1.1N
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In article <1995Jun17.002904.8466@titech.ac.jp>, mmuller@titech.ac.jp (Mateo Müller) writes:
> Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results.
> Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy.

-- 
Sun-mi Stewart | sstewart@clari.net
PGP Key fingerprint: ED25 EEBE 072C BDED
"Keep the channels open."