From jsanchez@hanse.de Tue Aug 01 06:24:17 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!jsanchez
From: jsanchez@hanse.de (Jens Sánchez)
Newsgroups: comp.dsp
Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Aug01.062417.4146@hanse.de>
Date: Tue, 01 Aug 1995 06:24:17 GMT
Organization: Hanse-Netzwerk Hamburg
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How the 14 ASCII characters per node are encoded into the record groove.

The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.
Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization.

Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword.

-- 
Jens Sánchez -- Hanse-Netzwerk Hamburg
"Do not worship the copy."

From tchoi@earthlink.net Tue Aug 01 17:46:17 1995
Path: ashpoly!cascade!bigsur!earthlink!tchoi
From: tchoi@earthlink.net (Tobias Choi)
Newsgroups: comp.dsp
Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Aug01.174617.3768@earthlink.net>
Date: Tue, 01 Aug 1995 17:46:17 GMT
References: <1995Aug01.062417.4146@hanse.de>
Organization: EarthLink Network
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In article <1995Aug01.062417.4146@hanse.de>, jsanchez@hanse.de (Jens Sánchez) writes:
> How the 14 ASCII characters per node are encoded into the record groove.

Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame.

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Tobias Choi
Opinions expressed are solely my own and not those of EarthLink Network.
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From lschneider@kth.se Thu Aug 03 09:46:17 1995
Path: ashpoly!cascade!brgate!saturno!kth!lschneider
From: lschneider@kth.se (Lisa Schneider)
Newsgroups: comp.dsp
Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream
Message-ID: <1995Aug03.094617.3433@kth.se>
Date: Thu, 03 Aug 1995 09:46:17 GMT
References: <1995Aug01.062417.4146@hanse.de>
Organization: Royal Institute of Technology, Stockholm
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In article <1995Aug01.062417.4146@hanse.de>, jsanchez@hanse.de (Jens Sánchez) writes:
> How the 14 ASCII characters per node are encoded into the record groove.
> The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code.

On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text.

-- 
Lisa Schneider
Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm.
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