From kandersson@panix.com Tue May 21 06:07:59 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!kandersson From: kandersson@panix.com (Katrin Andersson) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May21.060759.1753@panix.com> Date: Tue, 21 May 1996 06:07:59 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 11 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. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Katrin Andersson | kandersson@panix.com PGP Key fingerprint: 1BED 9645 83C8 5B0D "Keep the channels open." From jgarcia@netcom.com Thu May 23 08:07:59 1996 Path: ashpoly!cascade!bigsur!netcom!jgarcia From: jgarcia@netcom.com (Julien García) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May23.080759.3066@netcom.com> Date: Thu, 23 May 1996 08:07:59 GMT References: <1996May21.060759.1753@panix.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996May21.060759.1753@panix.com>, kandersson@panix.com (Katrin Andersson) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Julien García -- NETCOM On-Line Communication Services "Tape doesn't lie at 02:14. Ears do." From dsouza@kth.se Thu May 23 09:39:59 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!dsouza From: dsouza@kth.se (Dmitri Souza) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May23.093959.9809@kth.se> Date: Thu, 23 May 1996 09:39:59 GMT References: <1996May21.060759.1753@panix.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 10 In article <1996May21.060759.1753@panix.com>, kandersson@panix.com (Katrin Andersson) writes: > 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). Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Dmitri Souza Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From bsantos@tum.de Thu May 23 14:48:59 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!bsantos From: bsantos@tum.de (Bill Santos) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May23.144859.1842@tum.de> Date: Thu, 23 May 1996 14:48:59 GMT References: <1996May21.060759.1753@panix.com> <1996May23.080759.3066@netcom.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996May23.080759.3066@netcom.com>, jgarcia@netcom.com (Julien García) writes: > Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Bill Santos Hayes Optima 288 @ 14,400 bps "Hold for relay."