From cschneider@u-tokyo.ac.jp Fri Aug 02 02:52:14 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!cschneider From: cschneider@u-tokyo.ac.jp (Callum Schneider) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug02.025214.3082@u-tokyo.ac.jp> Date: Fri, 02 Aug 1996 02:52:14 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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). I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Callum Schneider *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From csantos@titech.ac.jp Sat Aug 03 09:18:14 1996 Path: ashpoly!cascade!mxgate!coyoacan!titech!csantos From: csantos@titech.ac.jp (Callum Santos) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug03.091814.8561@titech.ac.jp> Date: Sat, 03 Aug 1996 09:18:14 GMT References: <1996Aug02.025214.3082@u-tokyo.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug02.025214.3082@u-tokyo.ac.jp>, cschneider@u-tokyo.ac.jp (Callum Schneider) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. 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. -- === Callum Santos === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "They will send a copy in my place." From drobertson@panix.com Mon Aug 05 04:49:14 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!drobertson From: drobertson@panix.com (Dave Robertson) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug05.044914.6043@panix.com> Date: Mon, 05 Aug 1996 04:49:14 GMT References: <1996Aug02.025214.3082@u-tokyo.ac.jp> <1996Aug03.091814.8561@titech.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug03.091814.8561@titech.ac.jp>, csantos@titech.ac.jp (Callum Santos) 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Dave Robertson *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0