From mmuller@earthlink.net Wed Jun 07 18:34:27 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!mmuller From: mmuller@earthlink.net (Min-jun Müller) Newsgroups: comp.dsp Subject: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun07.183427.7121@earthlink.net> Date: Wed, 07 Jun 1995 18:34:27 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net 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. 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. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Min-jun Müller *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From mtanaka@kiae.su Thu Jun 08 09:03:27 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!mtanaka From: mtanaka@kiae.su (Matthias Tanaka) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun08.090327.2675@kiae.su> Date: Thu, 08 Jun 1995 09:03:27 GMT References: <1995Jun07.183427.7121@earthlink.net> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Jun07.183427.7121@earthlink.net>, mmuller@earthlink.net (Min-jun Müller) 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). The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Matthias Tanaka Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow. ------------------------------------------------------------ From mjohansson@mit.edu Thu Jun 08 21:52:27 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!mjohansson From: mjohansson@mit.edu (Mei Johansson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun08.215227.7770@mit.edu> Date: Thu, 08 Jun 1995 21:52:27 GMT References: <1995Jun07.183427.7121@earthlink.net> <1995Jun08.090327.2675@kiae.su> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun08.090327.2675@kiae.su>, mtanaka@kiae.su (Matthias Tanaka) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- === Mei Johansson === Dept of Electrical Engineering, Massachusetts Institute of Technology "There are 14 nodes and only 10 countries. Count again."