From agonzalez@uu.net Sat Nov 18 03:10:52 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!agonzalez
From: agonzalez@uu.net (Amy González)
Newsgroups: comp.dsp
Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Nov18.031052.9604@uu.net>
Date: Sat, 18 Nov 1995 03:10:52 GMT
Organization: UUNET Technologies, Falls Church VA
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I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics.
This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise.

I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu.

-- 
Amy González -- UUNET Technologies, Falls Church VA
"5 sigma is a discovery. 7 is a question."

From blopez@kiae.su Mon Nov 20 01:17:52 1995
Path: ashpoly!cascade!transat!ukc!fennimore!kiae!blopez
From: blopez@kiae.su (Bruno López)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Nov20.011752.4440@kiae.su>
Date: Mon, 20 Nov 1995 01:17:52 GMT
References: <1995Nov18.031052.9604@uu.net>
Organization: Kurchatov Institute of Atomic Energy, Moscow
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In article <1995Nov18.031052.9604@uu.net>, agonzalez@uu.net (Amy González) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz.

-- 
=== Bruno López ===
Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow
"A soul is not exclusive to biology."

From mkim@uu.net Tue Nov 21 14:42:52 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!mkim
From: mkim@uu.net (Min-jun Kim)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Nov21.144252.7637@uu.net>
Date: Tue, 21 Nov 1995 14:42:52 GMT
References: <1995Nov18.031052.9604@uu.net> <1995Nov20.011752.4440@kiae.su>
Organization: UUNET Technologies, Falls Church VA
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In article <1995Nov20.011752.4440@kiae.su>, blopez@kiae.su (Bruno López) writes:
> Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz.

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.

If you are posting from AOL, please read RFC 1036 before posting again.

-- 
=== Min-jun Kim ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"Do not worship the copy."