From mvasiliev@inria.fr Tue Jan 17 01:16:52 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!mvasiliev From: mvasiliev@inria.fr (Matthias Vasiliev) Newsgroups: comp.dsp Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan17.011652.5200@inria.fr> Date: Tue, 17 Jan 1995 01:16:52 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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). Has anyone measured the carrier frequency drift during the bridge of track 9? -- Matthias Vasiliev | mvasiliev@inria.fr PGP Key fingerprint: 5D9B 0D50 5519 B2A7 "Keep the channels open." From dtakahashi@kiae.su Tue Jan 17 15:31:52 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!dtakahashi From: dtakahashi@kiae.su (Dmitri Takahashi) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan17.153152.7647@kiae.su> Date: Tue, 17 Jan 1995 15:31:52 GMT References: <1995Jan17.011652.5200@inria.fr> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan17.011652.5200@inria.fr>, mvasiliev@inria.fr (Matthias Vasiliev) 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. Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. -- Dmitri Takahashi Practical Peripherals 14.4 @ 14,400 bps "The carrier frequency does not drift by accident."