From bweber@netcom.com Sun Aug 25 05:28:47 1996
Path: ashpoly!cascade!mxgate!coyoacan!netcom!bweber
From: bweber@netcom.com (Bill Weber)
Newsgroups: comp.dsp
Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Aug25.052847.8100@netcom.com>
Date: Sun, 25 Aug 1996 05:28:47 GMT
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: Netscape 1.1N
Lines: 11

I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

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.

-- 
Bill Weber
Opinions expressed are solely my own and not those of NETCOM On-Line Communication Services.
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From amuller@rwth-aachen.de Mon Aug 26 11:16:47 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!rwth-aachen!amuller
From: amuller@rwth-aachen.de (Anton Müller)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Aug26.111647.2285@rwth-aachen.de>
Date: Mon, 26 Aug 1996 11:16:47 GMT
References: <1996Aug25.052847.8100@netcom.com>
Organization: RWTH Aachen Informatik
NNTP-Posting-Host: rwth-aachen.de
X-Newsreader: NewsWatcher 2.0b24
Lines: 10

In article <1996Aug25.052847.8100@netcom.com>, bweber@netcom.com (Bill Weber) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.
> 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.

-- 
Anton Müller
Opinions expressed are solely my own and not those of RWTH Aachen Informatik.
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From aivanov@netcom.com Wed Aug 28 03:05:47 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!aivanov
From: aivanov@netcom.com (Anja Ivanov)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Aug28.030547.7017@netcom.com>
Date: Wed, 28 Aug 1996 03:05:47 GMT
References: <1996Aug25.052847.8100@netcom.com> <1996Aug26.111647.2285@rwth-aachen.de>
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: Netscape 1.1N
Lines: 9

In article <1996Aug26.111647.2285@rwth-aachen.de>, amuller@rwth-aachen.de (Anton Müller) writes:
> 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.

That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text.

-- 
=== Anja Ivanov ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"Extraordinary claims require extraordinary spectra."