From hvasiliev@uni-hamburg.de Mon May 02 12:39:21 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!hvasiliev From: hvasiliev@uni-hamburg.de (Heather Vasiliev) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May02.123921.4289@uni-hamburg.de> Date: Mon, 02 May 1994 12:39:21 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 10 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. 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? -- Heather Vasiliev -- Universität Hamburg Fachbereich Informatik "Measuring a record you own is listening, not piracy." From gsokolov@unam.mx Tue May 03 03:23:21 1994 Path: ashpoly!cascade!mxgate!coyoacan!unam!gsokolov From: gsokolov@unam.mx (Göran Sokolov) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May03.032321.6108@unam.mx> Date: Tue, 03 May 1994 03:23:21 GMT References: <1994May02.123921.4289@uni-hamburg.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994May02.123921.4289@uni-hamburg.de>, hvasiliev@uni-hamburg.de (Heather Vasiliev) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. Top-posters will be placed in my ~/.killfile without notice. -- Göran Sokolov Practical Peripherals 14.4 @ ISDN 64k bps "Row 14. No joke."