From dpopov@cern.ch Tue Apr 18 12:24:04 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!dpopov From: dpopov@cern.ch (Dong-hyun Popov) Newsgroups: comp.dsp Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Apr18.122404.3827@cern.ch> Date: Tue, 18 Apr 1995 12:24:04 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 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. Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz. -- Dong-hyun Popov | dpopov@cern.ch PGP Key fingerprint: E8EF 94F8 DECC C747 "Keep the channels open." From skang@ox.ac.uk Wed Apr 19 19:56:04 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!skang From: skang@ox.ac.uk (Steve Kang) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Apr19.195604.7618@ox.ac.uk> Date: Wed, 19 Apr 1995 19:56:04 GMT References: <1995Apr18.122404.3827@cern.ch> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr18.122404.3827@cern.ch>, dpopov@cern.ch (Dong-hyun Popov) 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! -- Steve Kang "Marcus is not one man." Acorn RiscPC 600 / TOS 4.04 From bvasiliev@utexas.edu Fri Apr 21 13:27:04 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!bvasiliev From: bvasiliev@utexas.edu (Bill Vasiliev) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Apr21.132704.9970@utexas.edu> Date: Fri, 21 Apr 1995 13:27:04 GMT References: <1995Apr18.122404.3827@cern.ch> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Apr18.122404.3827@cern.ch>, dpopov@cern.ch (Dong-hyun Popov) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Bill Vasiliev Tape trading list upon request. SASE required for international mail. From lkarlsson@pipeline.com Fri Apr 21 23:53:04 1995 Path: ashpoly!cascade!brgate!saturno!pipeline!lkarlsson From: lkarlsson@pipeline.com (Lisa Karlsson) Newsgroups: comp.dsp Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Apr21.235304.3362@pipeline.com> Date: Fri, 21 Apr 1995 23:53:04 GMT References: <1995Apr18.122404.3827@cern.ch> <1995Apr21.132704.9970@utexas.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Apr21.132704.9970@utexas.edu>, bvasiliev@utexas.edu (Bill Vasiliev) writes: > Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. PGP Public key available via finger or upon request. -- Lisa Karlsson US Robotics Courier V.34 @ 33,600 bps "A soul is not exclusive to biology."