From achoi@berkeley.edu Tue Jan 17 06:49:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!achoi From: achoi@berkeley.edu (Anton Choi) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan17.064939.2513@berkeley.edu> Date: Tue, 17 Jan 1995 06:49:39 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 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). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Anton Choi Tape trading list upon request. SASE required for international mail. From bgirard@earthlink.net Tue Jan 17 17:16:39 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!bgirard From: bgirard@earthlink.net (Bastien Girard) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan17.171639.6588@earthlink.net> Date: Tue, 17 Jan 1995 17:16:39 GMT References: <1995Jan17.064939.2513@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan17.064939.2513@berkeley.edu>, achoi@berkeley.edu (Anton Choi) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Bastien Girard Zyxel U-1496E @ 9600 Telebit bps "The hatch is open. Is anyone listening?" From hmuller@illinois.edu Thu Jan 19 14:19:39 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!hmuller From: hmuller@illinois.edu (Hana Müller) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan19.141939.7826@illinois.edu> Date: Thu, 19 Jan 1995 14:19:39 GMT References: <1995Jan17.064939.2513@berkeley.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jan17.064939.2513@berkeley.edu>, achoi@berkeley.edu (Anton Choi) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Hana Müller Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From jjohansson@kiae.su Fri Jan 20 02:59:39 1995 Path: ashpoly!cascade!bigsur!kiae!jjohansson From: jjohansson@kiae.su (Julien Johansson) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan20.025939.5411@kiae.su> Date: Fri, 20 Jan 1995 02:59:39 GMT References: <1995Jan17.064939.2513@berkeley.edu> <1995Jan19.141939.7826@illinois.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan19.141939.7826@illinois.edu>, hmuller@illinois.edu (Hana 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. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Julien Johansson | jjohansson@kiae.su PGP Key fingerprint: 8E3B 6E2C A15B 1899 "Keep the channels open." From nkim@stanford.edu Sat Jan 21 01:51:39 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!nkim From: nkim@stanford.edu (Nadia Kim) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan21.015139.6144@stanford.edu> Date: Sat, 21 Jan 1995 01:51:39 GMT References: <1995Jan17.064939.2513@berkeley.edu> <1995Jan19.141939.7826@illinois.edu> <1995Jan20.025939.5411@kiae.su> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jan20.025939.5411@kiae.su>, jjohansson@kiae.su (Julien Johansson) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Top-posters will be placed in my ~/.killfile without notice. -- Nadia Kim -- Stanford University Computer Systems Lab "Do not worship the copy."