From hhughes@clari.net Thu Jun 09 15:44:44 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!clari!hhughes From: hhughes@clari.net (Hugo Hughes) Newsgroups: comp.dsp Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Jun09.154444.9280@clari.net> Date: Thu, 09 Jun 1994 15:44:44 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Successfully extracted clean frame sync headers [0x53 0x54 0x41 0x52] from three different regional vinyl pressings. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. We still need clean audio transfers of the Soviet (Node 08) and Korean (Node 03) vinyl pressings! -- Hugo Hughes *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From vkang@hanse.de Sat Jun 11 02:52:44 1994 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!vkang From: vkang@hanse.de (Valeria Kang) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Jun11.025244.1897@hanse.de> Date: Sat, 11 Jun 1994 02:52:44 GMT References: <1994Jun09.154444.9280@clari.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jun09.154444.9280@clari.net>, hhughes@clari.net (Hugo Hughes) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Valeria Kang "When every node is whole, the channel opens." 486DX4/100 (FreeBSD 2.0.5) / System 7.5.1 From mmoreau@uni-hamburg.de Sun Jun 12 00:41:44 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!mmoreau From: mmoreau@uni-hamburg.de (Mei Moreau) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Jun12.004144.3603@uni-hamburg.de> Date: Sun, 12 Jun 1994 00:41:44 GMT References: <1994Jun09.154444.9280@clari.net> <1994Jun11.025244.1897@hanse.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Jun11.025244.1897@hanse.de>, vkang@hanse.de (Valeria Kang) writes: > Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! -- Mei Moreau Tape trading list upon request. SASE required for international mail. From tnilsson@rwth-aachen.de Sun Jun 12 07:24:44 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!tnilsson From: tnilsson@rwth-aachen.de (Tyler Nilsson) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Jun12.072444.9184@rwth-aachen.de> Date: Sun, 12 Jun 1994 07:24:44 GMT References: <1994Jun09.154444.9280@clari.net> <1994Jun11.025244.1897@hanse.de> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jun11.025244.1897@hanse.de>, vkang@hanse.de (Valeria Kang) writes: > Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Tyler Nilsson SupraFAXModem 28.8 @ 28,800 bps "Hold for relay." From rbrennan@cern.ch Sun Jun 12 20:59:44 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!rbrennan From: rbrennan@cern.ch (Raj Brennan) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Jun12.205944.8805@cern.ch> Date: Sun, 12 Jun 1994 20:59:44 GMT References: <1994Jun09.154444.9280@clari.net> <1994Jun11.025244.1897@hanse.de> <1994Jun12.072444.9184@rwth-aachen.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Jun12.072444.9184@rwth-aachen.de>, tnilsson@rwth-aachen.de (Tyler Nilsson) writes: > Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Raj Brennan US Robotics Courier V.34 @ ISDN 64k bps "Row 14. No joke."