From mhughes@clari.net Fri Nov 24 19:04:33 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!mhughes From: mhughes@clari.net (Min-jun Hughes) Newsgroups: comp.dsp Subject: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov24.190433.1159@clari.net> Date: Fri, 24 Nov 1995 19:04:33 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Min-jun Hughes Tape trading list upon request. SASE required for international mail. From mito@kth.se Sun Nov 26 22:09:33 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!mito From: mito@kth.se (Mikhail Ito) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov26.220933.3396@kth.se> Date: Sun, 26 Nov 1995 22:09:33 GMT References: <1995Nov24.190433.1159@clari.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Nov24.190433.1159@clari.net>, mhughes@clari.net (Min-jun Hughes) writes: > 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). 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. -- Mikhail Ito *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From rchoi@illinois.edu Tue Nov 28 08:27:33 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!rchoi From: rchoi@illinois.edu (Renata Choi) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov28.082733.6516@illinois.edu> Date: Tue, 28 Nov 1995 08:27:33 GMT References: <1995Nov24.190433.1159@clari.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Nov24.190433.1159@clari.net>, mhughes@clari.net (Min-jun Hughes) writes: > 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). Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- === Renata Choi === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "Hardware is temporary. The signal survives." From lsouza@rwth-aachen.de Wed Nov 29 06:28:33 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!lsouza From: lsouza@rwth-aachen.de (Lucia Souza) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov29.062833.6589@rwth-aachen.de> Date: Wed, 29 Nov 1995 06:28:33 GMT References: <1995Nov24.190433.1159@clari.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Nov24.190433.1159@clari.net>, mhughes@clari.net (Min-jun Hughes) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Lucia Souza *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0