From lkim@pipeline.com Thu Sep 07 14:18:43 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!lkim From: lkim@pipeline.com (Lars Kim) Newsgroups: comp.dsp Subject: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep07.141843.9432@pipeline.com> Date: Thu, 07 Sep 1995 14:18:43 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. 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! -- === Lars Kim === Dept of Electrical Engineering, The Pipeline Internet Network "Row 14. No joke." From kivanov@cam.ac.uk Sat Sep 09 14:14:43 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!kivanov From: kivanov@cam.ac.uk (Karen Ivanov) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep09.141443.3882@cam.ac.uk> Date: Sat, 09 Sep 1995 14:14:43 GMT References: <1995Sep07.141843.9432@pipeline.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep07.141843.9432@pipeline.com>, lkim@pipeline.com (Lars Kim) 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. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Karen Ivanov "Hardware is temporary. The signal survives." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13 From ndubois@berkeley.edu Sun Sep 10 23:01:43 1995 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!ndubois From: ndubois@berkeley.edu (Natalia Dubois) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep10.230143.8516@berkeley.edu> Date: Sun, 10 Sep 1995 23:01:43 GMT References: <1995Sep07.141843.9432@pipeline.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Sep07.141843.9432@pipeline.com>, lkim@pipeline.com (Lars Kim) 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! -- Natalia Dubois Tape trading list upon request. SASE required for international mail. From rrobertson@earthlink.net Mon Sep 11 23:09:43 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!rrobertson From: rrobertson@earthlink.net (Renata Robertson) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep11.230943.5527@earthlink.net> Date: Mon, 11 Sep 1995 23:09:43 GMT References: <1995Sep07.141843.9432@pipeline.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep07.141843.9432@pipeline.com>, lkim@pipeline.com (Lars Kim) 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. On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! -- Renata Robertson | rrobertson@earthlink.net PGP Key fingerprint: 0FAF 1729 174C 4DA3 "Keep the channels open." From fwatanabe@u-tokyo.ac.jp Tue Sep 12 09:50:43 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!fwatanabe From: fwatanabe@u-tokyo.ac.jp (Fiona Watanabe) Newsgroups: comp.dsp Subject: Re: Data: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep12.095043.1934@u-tokyo.ac.jp> Date: Tue, 12 Sep 1995 09:50:43 GMT References: <1995Sep07.141843.9432@pipeline.com> <1995Sep11.230943.5527@earthlink.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep11.230943.5527@earthlink.net>, rrobertson@earthlink.net (Renata Robertson) writes: > On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Fiona Watanabe Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------