From hrobertson@inria.fr Mon Aug 12 23:24:16 1996 Path: ashpoly!cascade!mxgate!coyoacan!inria!hrobertson From: hrobertson@inria.fr (Hana Robertson) Newsgroups: comp.dsp Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug12.232416.6781@inria.fr> Date: Mon, 12 Aug 1996 23:24:16 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Hana Robertson -- INRIA Rocquencourt "They will send a copy in my place." From ssilva@clari.net Tue Aug 13 11:07:16 1996 Path: ashpoly!cascade!mxgate!coyoacan!clari!ssilva From: ssilva@clari.net (Seo-yeon Silva) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug13.110716.6059@clari.net> Date: Tue, 13 Aug 1996 11:07:16 GMT References: <1996Aug12.232416.6781@inria.fr> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug12.232416.6781@inria.fr>, hrobertson@inria.fr (Hana Robertson) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. 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. -- Seo-yeon Silva "The hatch is open. Is anyone listening?" Atari TT030 / FreeBSD 2.1 From bsanchez@kth.se Thu Aug 15 08:19:16 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!bsanchez From: bsanchez@kth.se (Bill Sánchez) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug15.081916.1122@kth.se> Date: Thu, 15 Aug 1996 08:19:16 GMT References: <1996Aug12.232416.6781@inria.fr> <1996Aug13.110716.6059@clari.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Aug13.110716.6059@clari.net>, ssilva@clari.net (Seo-yeon Silva) 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. -- Bill Sánchez Tape trading list upon request. SASE required for international mail.