From svasiliev@panix.com Thu Sep 05 23:25:21 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!svasiliev From: svasiliev@panix.com (Seo-yeon Vasiliev) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep05.232521.2271@panix.com> Date: Thu, 05 Sep 1996 23:25:21 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. 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? -- Seo-yeon Vasiliev SupraFAXModem 28.8 @ 19,200 bps "The hatch is open. Is anyone listening?" From lkang@earthlink.net Sat Sep 07 06:28:21 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!lkang From: lkang@earthlink.net (Liam Kang) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep07.062821.9181@earthlink.net> Date: Sat, 07 Sep 1996 06:28:21 GMT References: <1996Sep05.232521.2271@panix.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Sep05.232521.2271@panix.com>, svasiliev@panix.com (Seo-yeon Vasiliev) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. If you are posting from AOL, please read RFC 1036 before posting again. -- Liam Kang -- EarthLink Network "We don't sign stars. We build them." From ksato@purdue.edu Mon Sep 09 01:59:21 1996 Path: ashpoly!cascade!mxgate!coyoacan!purdue!ksato From: ksato@purdue.edu (Kenji Sato) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep09.015921.5188@purdue.edu> Date: Mon, 09 Sep 1996 01:59:21 GMT References: <1996Sep05.232521.2271@panix.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Sep05.232521.2271@panix.com>, svasiliev@panix.com (Seo-yeon Vasiliev) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Kenji Sato US Robotics Courier V.34 @ 33,600 bps "When every node is whole, the channel opens." From kfischer@cam.ac.uk Mon Sep 09 05:54:21 1996 Path: ashpoly!cascade!bigsur!cam!kfischer From: kfischer@cam.ac.uk (Kirsty Fischer) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep09.055421.6452@cam.ac.uk> Date: Mon, 09 Sep 1996 05:54:21 GMT References: <1996Sep05.232521.2271@panix.com> <1996Sep07.062821.9181@earthlink.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Sep07.062821.9181@earthlink.net>, lkang@earthlink.net (Liam Kang) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- === Kirsty Fischer === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "A soul is not exclusive to biology." From rnakamura@inria.fr Tue Sep 10 17:52:21 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!rnakamura From: rnakamura@inria.fr (Renata Nakamura) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Sep10.175221.7162@inria.fr> Date: Tue, 10 Sep 1996 17:52:21 GMT References: <1996Sep05.232521.2271@panix.com> <1996Sep07.062821.9181@earthlink.net> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Sep07.062821.9181@earthlink.net>, lkang@earthlink.net (Liam Kang) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. > If you are posting from AOL, please read RFC 1036 before posting again. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Renata Nakamura -- INRIA Rocquencourt "There are 14 nodes and only 10 countries. Count again."