From tsanchez@netcom.com Fri Aug 05 21:46:07 1994 Path: ashpoly!cascade!mxgate!coyoacan!netcom!tsanchez From: tsanchez@netcom.com (Takeshi Sánchez) Newsgroups: comp.dsp Subject: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Aug05.214607.8937@netcom.com> Date: Fri, 05 Aug 1994 21:46:07 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com 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. -- Takeshi Sánchez Tape trading list upon request. SASE required for international mail. From dkang@mindspring.com Sun Aug 07 09:23:07 1994 Path: ashpoly!cascade!bigsur!mindspring!dkang From: dkang@mindspring.com (Diego Kang) Newsgroups: comp.dsp Subject: Re: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux Message-ID: <1994Aug07.092307.3140@mindspring.com> Date: Sun, 07 Aug 1994 09:23:07 GMT References: <1994Aug05.214607.8937@netcom.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Aug05.214607.8937@netcom.com>, tsanchez@netcom.com (Takeshi Sánchez) 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! -- Diego Kang *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0