From sramirez@hanse.de Sat Nov 26 07:09:45 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!sramirez From: sramirez@hanse.de (Sergei Ramírez) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov26.070945.1393@hanse.de> Date: Sat, 26 Nov 1994 07:09:45 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 10 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). Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Sergei Ramírez Tape trading list upon request. SASE required for international mail. From dtakahashi@kth.se Sun Nov 27 13:14:45 1994 Path: ashpoly!cascade!transat!ukc!fennimore!kth!dtakahashi From: dtakahashi@kth.se (Dave Takahashi) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov27.131445.7336@kth.se> Date: Sun, 27 Nov 1994 13:14:45 GMT References: <1994Nov26.070945.1393@hanse.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Nov26.070945.1393@hanse.de>, sramirez@hanse.de (Sergei Ramírez) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Dave Takahashi | dtakahashi@kth.se PGP Key fingerprint: 0F92 4E56 210A A858 "Keep the channels open." From dhughes@cern.ch Mon Nov 28 01:49:45 1994 Path: ashpoly!cascade!transat!ukc!fennimore!cern!dhughes From: dhughes@cern.ch (Diego Hughes) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov28.014945.7683@cern.ch> Date: Mon, 28 Nov 1994 01:49:45 GMT References: <1994Nov26.070945.1393@hanse.de> <1994Nov27.131445.7336@kth.se> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Nov27.131445.7336@kth.se>, dtakahashi@kth.se (Dave Takahashi) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! If you are posting from AOL, please read RFC 1036 before posting again. -- Diego Hughes "Tape doesn't lie at 02:14. Ears do." Atari TT030 / System 7.5.1 From vcampbell@ox.ac.uk Tue Nov 29 05:16:45 1994 Path: ashpoly!cascade!transat!ukc!fennimore!ox!vcampbell From: vcampbell@ox.ac.uk (Valeria Campbell) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov29.051645.9113@ox.ac.uk> Date: Tue, 29 Nov 1994 05:16:45 GMT References: <1994Nov26.070945.1393@hanse.de> <1994Nov27.131445.7336@kth.se> <1994Nov28.014945.7683@cern.ch> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Nov28.014945.7683@cern.ch>, dhughes@cern.ch (Diego Hughes) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! > If you are posting from AOL, please read RFC 1036 before posting again. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- === Valeria Campbell === Dept of Electrical Engineering, Oxford University Computing Laboratory "In theory there is no difference between theory and practice." From apetrov@illinois.edu Tue Nov 29 13:22:45 1994 Path: ashpoly!cascade!mxgate!coyoacan!illinois!apetrov From: apetrov@illinois.edu (Amy Petrov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov29.132245.9109@illinois.edu> Date: Tue, 29 Nov 1994 13:22:45 GMT References: <1994Nov26.070945.1393@hanse.de> <1994Nov27.131445.7336@kth.se> <1994Nov28.014945.7683@cern.ch> <1994Nov29.051645.9113@ox.ac.uk> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Nov29.051645.9113@ox.ac.uk>, vcampbell@ox.ac.uk (Valeria Campbell) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Amy Petrov -- University of Illinois Urbana-Champaign "5 sigma is a discovery. 7 is a question."