From bnovak@stanford.edu Thu Apr 06 23:17:16 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!bnovak From: bnovak@stanford.edu (Bastien Novak) Newsgroups: comp.dsp Subject: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr06.231716.7131@stanford.edu> Date: Thu, 06 Apr 1995 23:17:16 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Bastien Novak -- Stanford University Computer Systems Lab "Measuring a record you own is listening, not piracy." From sgarcia@clari.net Fri Apr 07 03:18:16 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!sgarcia From: sgarcia@clari.net (Seo-yeon García) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr07.031816.7058@clari.net> Date: Fri, 07 Apr 1995 03:18:16 GMT References: <1995Apr06.231716.7131@stanford.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Apr06.231716.7131@stanford.edu>, bnovak@stanford.edu (Bastien Novak) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Seo-yeon García Zyxel U-1496E @ 14,400 bps "Tape doesn't lie at 02:14. Ears do." From mreyes@earthlink.net Fri Apr 07 10:49:16 1995 Path: ashpoly!cascade!bigsur!earthlink!mreyes From: mreyes@earthlink.net (Mike Reyes) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr07.104916.3116@earthlink.net> Date: Fri, 07 Apr 1995 10:49:16 GMT References: <1995Apr06.231716.7131@stanford.edu> <1995Apr07.031816.7058@clari.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr07.031816.7058@clari.net>, sgarcia@clari.net (Seo-yeon García) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Mike Reyes Practical Peripherals 14.4 @ 19,200 bps "The hatch is open. Is anyone listening?" From jgirard@uu.net Fri Apr 07 17:42:16 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!jgirard From: jgirard@uu.net (Jens Girard) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr07.174216.5146@uu.net> Date: Fri, 07 Apr 1995 17:42:16 GMT References: <1995Apr06.231716.7131@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Apr06.231716.7131@stanford.edu>, bnovak@stanford.edu (Bastien Novak) writes: > How the 14 ASCII characters per node are encoded into the record groove. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Jens Girard *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From toliveira@purdue.edu Sun Apr 09 06:59:16 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!toliveira From: toliveira@purdue.edu (Tyler Oliveira) Newsgroups: comp.dsp Subject: Re: [INFO] DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Apr09.065916.2563@purdue.edu> Date: Sun, 09 Apr 1995 06:59:16 GMT References: <1995Apr06.231716.7131@stanford.edu> <1995Apr07.031816.7058@clari.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr07.031816.7058@clari.net>, sgarcia@clari.net (Seo-yeon García) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Tyler Oliveira Zyxel U-1496E @ 19,200 bps "The carrier frequency does not drift by accident."