From joliveira@inria.fr Sun Sep 22 14:57:27 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!joliveira From: joliveira@inria.fr (Ji-woo Oliveira) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep22.145727.6272@inria.fr> Date: Sun, 22 Sep 1996 14:57:27 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Ji-woo Oliveira *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From krobertson@inria.fr Tue Sep 24 00:37:27 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!krobertson From: krobertson@inria.fr (Kenji Robertson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep24.003727.9720@inria.fr> Date: Tue, 24 Sep 1996 00:37:27 GMT References: <1996Sep22.145727.6272@inria.fr> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Sep22.145727.6272@inria.fr>, joliveira@inria.fr (Ji-woo Oliveira) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > 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! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Kenji Robertson Tape trading list upon request. SASE required for international mail.