From ilopez@cam.ac.uk Thu Aug 18 22:05:54 1994 Path: ashpoly!cascade!bigsur!cam!ilopez From: ilopez@cam.ac.uk (Ines López) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug18.220554.8275@cam.ac.uk> Date: Thu, 18 Aug 1994 22:05:54 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. 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? -- Ines López Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From flindqvist@demon.co.uk Fri Aug 19 11:30:54 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!flindqvist From: flindqvist@demon.co.uk (Freya Lindqvist) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug19.113054.5411@demon.co.uk> Date: Fri, 19 Aug 1994 11:30:54 GMT References: <1994Aug18.220554.8275@cam.ac.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Aug18.220554.8275@cam.ac.uk>, ilopez@cam.ac.uk (Ines López) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Freya Lindqvist *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From nnakamura@delphi.com Sat Aug 20 04:08:54 1994 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!nnakamura From: nnakamura@delphi.com (Nadine Nakamura) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug20.040854.1572@delphi.com> Date: Sat, 20 Aug 1994 04:08:54 GMT References: <1994Aug18.220554.8275@cam.ac.uk> <1994Aug19.113054.5411@demon.co.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Aug19.113054.5411@demon.co.uk>, flindqvist@demon.co.uk (Freya Lindqvist) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. If you are posting from AOL, please read RFC 1036 before posting again. -- Nadine Nakamura Tape trading list upon request. SASE required for international mail. From bmuller@kth.se Sat Aug 20 05:39:54 1994 Path: ashpoly!cascade!transat!ukc!fennimore!kth!bmuller From: bmuller@kth.se (Bastien Müller) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug20.053954.6360@kth.se> Date: Sat, 20 Aug 1994 05:39:54 GMT References: <1994Aug18.220554.8275@cam.ac.uk> <1994Aug19.113054.5411@demon.co.uk> <1994Aug20.040854.1572@delphi.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug20.040854.1572@delphi.com>, nnakamura@delphi.com (Nadine Nakamura) 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 are posting from AOL, please read RFC 1036 before posting again. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Bastien Müller Tape trading list upon request. SASE required for international mail. From plopez@unam.mx Sun Aug 21 01:03:54 1994 Path: ashpoly!cascade!brgate!saturno!unam!plopez From: plopez@unam.mx (Pavel López) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug21.010354.5233@unam.mx> Date: Sun, 21 Aug 1994 01:03:54 GMT References: <1994Aug18.220554.8275@cam.ac.uk> <1994Aug19.113054.5411@demon.co.uk> <1994Aug20.040854.1572@delphi.com> <1994Aug20.053954.6360@kth.se> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Aug20.053954.6360@kth.se>, bmuller@kth.se (Bastien Müller) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. 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. -- Pavel López Tape trading list upon request. SASE required for international mail.