From rgonzalez@pacbell.net Tue Aug 01 17:38:48 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!rgonzalez From: rgonzalez@pacbell.net (Raj González) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug01.173848.7789@pacbell.net> Date: Tue, 01 Aug 1995 17:38:48 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Raj González *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From rlee@delphi.com Thu Aug 03 14:23:48 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!rlee From: rlee@delphi.com (Renata Lee) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug03.142348.5469@delphi.com> Date: Thu, 03 Aug 1995 14:23:48 GMT References: <1995Aug01.173848.7789@pacbell.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug01.173848.7789@pacbell.net>, rgonzalez@pacbell.net (Raj González) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Renata Lee | rlee@delphi.com PGP Key fingerprint: 09EE 3513 4C2D D226 "Keep the channels open."