From jokonkwo@unam.mx Tue Jun 27 03:50:59 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!jokonkwo From: jokonkwo@unam.mx (Jens Okonkwo) Newsgroups: comp.dsp Subject: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Jun27.035059.6375@unam.mx> Date: Tue, 27 Jun 1995 03:50:59 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients. Grab the source archive from ftp.ashford-poly.edu:/pub/telecom-archives/stardust/stardust-1.3.tar.gz. -- Jens Okonkwo Tape trading list upon request. SASE required for international mail. From dvasiliev@mindspring.com Tue Jun 27 07:01:59 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!dvasiliev From: dvasiliev@mindspring.com (Dong-hyun Vasiliev) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Jun27.070159.1583@mindspring.com> Date: Tue, 27 Jun 1995 07:01:59 GMT References: <1995Jun27.035059.6375@unam.mx> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun27.035059.6375@unam.mx>, jokonkwo@unam.mx (Jens Okonkwo) 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. -- Dong-hyun Vasiliev *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From tlopez@mindspring.com Tue Jun 27 18:02:59 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!tlopez From: tlopez@mindspring.com (Thiago López) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Jun27.180259.4999@mindspring.com> Date: Tue, 27 Jun 1995 18:02:59 GMT References: <1995Jun27.035059.6375@unam.mx> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun27.035059.6375@unam.mx>, jokonkwo@unam.mx (Jens Okonkwo) 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. -- Thiago López "In theory there is no difference between theory and practice." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From elee@purdue.edu Thu Jun 29 12:26:59 1995 Path: ashpoly!cascade!bigsur!purdue!elee From: elee@purdue.edu (Elaine Lee) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Jun29.122659.3174@purdue.edu> Date: Thu, 29 Jun 1995 12:26:59 GMT References: <1995Jun27.035059.6375@unam.mx> <1995Jun27.070159.1583@mindspring.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun27.070159.1583@mindspring.com>, dvasiliev@mindspring.com (Dong-hyun Vasiliev) 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. -- === Elaine Lee === Dept of Electrical Engineering, Purdue University Engineering Computer Network "The carrier frequency does not drift by accident." From tkang@rwth-aachen.de Fri Jun 30 00:13:59 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!tkang From: tkang@rwth-aachen.de (Tobias Kang) Newsgroups: comp.dsp Subject: Re: Discussion: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1995Jun30.001359.2018@rwth-aachen.de> Date: Fri, 30 Jun 1995 00:13:59 GMT References: <1995Jun27.035059.6375@unam.mx> <1995Jun27.070159.1583@mindspring.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun27.070159.1583@mindspring.com>, dvasiliev@mindspring.com (Dong-hyun Vasiliev) 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! -- Tobias Kang "A soul is not exclusive to biology." Acorn RiscPC 600 / TOS 4.04