From kkim@u-tokyo.ac.jp Sat Jan 07 22:02:31 1995 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!kkim From: kkim@u-tokyo.ac.jp (Karen Kim) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan07.220231.9206@u-tokyo.ac.jp> Date: Sat, 07 Jan 1995 22:02:31 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp 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). 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? -- Karen Kim -- University of Tokyo Department of Information Science "Row 14. No joke." From smoreau@stanford.edu Mon Jan 09 00:23:31 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!smoreau From: smoreau@stanford.edu (Seo-yeon Moreau) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan09.002331.6456@stanford.edu> Date: Mon, 09 Jan 1995 00:23:31 GMT References: <1995Jan07.220231.9206@u-tokyo.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan07.220231.9206@u-tokyo.ac.jp>, kkim@u-tokyo.ac.jp (Karen Kim) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- === Seo-yeon Moreau === Dept of Electrical Engineering, Stanford University Computer Systems Lab "Hold for relay." From nwatanabe@purdue.edu Tue Jan 10 00:57:31 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!nwatanabe From: nwatanabe@purdue.edu (Nadine Watanabe) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jan10.005731.2390@purdue.edu> Date: Tue, 10 Jan 1995 00:57:31 GMT References: <1995Jan07.220231.9206@u-tokyo.ac.jp> <1995Jan09.002331.6456@stanford.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan09.002331.6456@stanford.edu>, smoreau@stanford.edu (Seo-yeon Moreau) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Nadine Watanabe *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0