From ksantos@u-tokyo.ac.jp Thu May 26 21:45:28 1994 Path: ashpoly!cascade!bigsur!u-tokyo!ksantos From: ksantos@u-tokyo.ac.jp (Karen Santos) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May26.214528.7624@u-tokyo.ac.jp> Date: Thu, 26 May 1994 21:45:28 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 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. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Karen Santos Tape trading list upon request. SASE required for international mail. From lwatanabe@illinois.edu Sun May 29 01:39:28 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!lwatanabe From: lwatanabe@illinois.edu (Lisa Watanabe) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May29.013928.3303@illinois.edu> Date: Sun, 29 May 1994 01:39:28 GMT References: <1994May26.214528.7624@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May26.214528.7624@u-tokyo.ac.jp>, ksantos@u-tokyo.ac.jp (Karen Santos) 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. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Lisa Watanabe Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From ehernandez@hanse.de Tue May 31 03:15:28 1994 Path: ashpoly!cascade!mxgate!coyoacan!hanse!ehernandez From: ehernandez@hanse.de (Élodie Hernández) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May31.031528.5533@hanse.de> Date: Tue, 31 May 1994 03:15:28 GMT References: <1994May26.214528.7624@u-tokyo.ac.jp> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May26.214528.7624@u-tokyo.ac.jp>, ksantos@u-tokyo.ac.jp (Karen Santos) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Élodie Hernández Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------ From hlee@uni-hamburg.de Tue May 31 06:06:28 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!hlee From: hlee@uni-hamburg.de (Hugo Lee) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May31.060628.4949@uni-hamburg.de> Date: Tue, 31 May 1994 06:06:28 GMT References: <1994May26.214528.7624@u-tokyo.ac.jp> <1994May29.013928.3303@illinois.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May29.013928.3303@illinois.edu>, lwatanabe@illinois.edu (Lisa Watanabe) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Hugo Lee *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From ylopez@cmu.edu Wed Jun 01 04:20:28 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!ylopez From: ylopez@cmu.edu (Yuki López) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun01.042028.6478@cmu.edu> Date: Wed, 01 Jun 1994 04:20:28 GMT References: <1994May26.214528.7624@u-tokyo.ac.jp> <1994May31.031528.5533@hanse.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994May31.031528.5533@hanse.de>, ehernandez@hanse.de (Élodie Hernández) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Top-posters will be placed in my ~/.killfile without notice. -- === Yuki López === Dept of Electrical Engineering, Carnegie Mellon University School of CS "We don't sign stars. We build them."