From irobertson@pacbell.net Mon Sep 04 19:54:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!irobertson From: irobertson@pacbell.net (Ines Robertson) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep04.195432.4541@pacbell.net> Date: Mon, 04 Sep 1995 19:54:32 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- === Ines Robertson === Dept of Electrical Engineering, Pacific Bell Internet Services "When every node is whole, the channel opens." From lpetrov@cern.ch Tue Sep 05 06:05:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!lpetrov From: lpetrov@cern.ch (Lisa Petrov) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep05.060532.5762@cern.ch> Date: Tue, 05 Sep 1995 06:05:32 GMT References: <1995Sep04.195432.4541@pacbell.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep04.195432.4541@pacbell.net>, irobertson@pacbell.net (Ines Robertson) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Lisa Petrov | lpetrov@cern.ch PGP Key fingerprint: 19AB A914 100B 188E "Keep the channels open." From spark@delphi.com Wed Sep 06 01:05:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!spark From: spark@delphi.com (Sun-mi Park) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep06.010532.2623@delphi.com> Date: Wed, 06 Sep 1995 01:05:32 GMT References: <1995Sep04.195432.4541@pacbell.net> <1995Sep05.060532.5762@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Sep05.060532.5762@cern.ch>, lpetrov@cern.ch (Lisa Petrov) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Sun-mi Park === Dept of Electrical Engineering, Delphi Internet Services "Measuring a record you own is listening, not piracy." From mtakahashi@unam.mx Wed Sep 06 12:17:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!mtakahashi From: mtakahashi@unam.mx (Mikhail Takahashi) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep06.121732.2459@unam.mx> Date: Wed, 06 Sep 1995 12:17:32 GMT References: <1995Sep04.195432.4541@pacbell.net> <1995Sep05.060532.5762@cern.ch> <1995Sep06.010532.2623@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Sep06.010532.2623@delphi.com>, spark@delphi.com (Sun-mi Park) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Mikhail Takahashi "A soul is not exclusive to biology." PC-9821Ap2 (NEC) / SunOS 4.1.4 From grobertson@pipeline.com Thu Sep 07 12:34:32 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!grobertson From: grobertson@pipeline.com (Göran Robertson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep07.123432.4567@pipeline.com> Date: Thu, 07 Sep 1995 12:34:32 GMT References: <1995Sep04.195432.4541@pacbell.net> <1995Sep05.060532.5762@cern.ch> <1995Sep06.010532.2623@delphi.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Sep06.010532.2623@delphi.com>, spark@delphi.com (Sun-mi Park) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Göran Robertson Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------