From nsilva@stanford.edu Tue Sep 19 12:55:33 1995 Path: ashpoly!cascade!bigsur!stanford!nsilva From: nsilva@stanford.edu (Natalia Silva) Newsgroups: comp.dsp Subject: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep19.125533.9970@stanford.edu> Date: Tue, 19 Sep 1995 12:55:33 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. The original stardust.c v1.0 dropped sync whenever there was a scratch or surface pop on the record. Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz. -- Natalia Silva Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From aivanov@utexas.edu Wed Sep 20 15:27:33 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!aivanov From: aivanov@utexas.edu (Aiko Ivanov) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep20.152733.5830@utexas.edu> Date: Wed, 20 Sep 1995 15:27:33 GMT References: <1995Sep19.125533.9970@stanford.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep19.125533.9970@stanford.edu>, nsilva@stanford.edu (Natalia Silva) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! -- Aiko Ivanov *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From nkim@uu.net Thu Sep 21 23:02:33 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uu!nkim From: nkim@uu.net (Natalia Kim) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep21.230233.8788@uu.net> Date: Thu, 21 Sep 1995 23:02:33 GMT References: <1995Sep19.125533.9970@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep19.125533.9970@stanford.edu>, nsilva@stanford.edu (Natalia Silva) writes: > Demodulating the 14.2 Hz Stardust carrier: software update and benchmark results. > Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time. Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro. -- Natalia Kim Tape trading list upon request. SASE required for international mail. From lcampbell@titech.ac.jp Sun Sep 24 01:46:33 1995 Path: ashpoly!cascade!transat!ukc!fennimore!titech!lcampbell From: lcampbell@titech.ac.jp (Lisa Campbell) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Sep24.014633.7120@titech.ac.jp> Date: Sun, 24 Sep 1995 01:46:33 GMT References: <1995Sep19.125533.9970@stanford.edu> <1995Sep20.152733.5830@utexas.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep20.152733.5830@utexas.edu>, aivanov@utexas.edu (Aiko Ivanov) writes: > On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work! Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy. -- Lisa Campbell Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------