From jnilsson@uu.net Wed Oct 16 13:17:57 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!jnilsson From: jnilsson@uu.net (Ji-woo Nilsson) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Oct16.131757.5954@uu.net> Date: Wed, 16 Oct 1996 13:17:57 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net 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. 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? -- Ji-woo Nilsson Tape trading list upon request. SASE required for international mail. From ftakahashi@stanford.edu Thu Oct 17 14:34:57 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!ftakahashi From: ftakahashi@stanford.edu (Fiona Takahashi) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Oct17.143457.4207@stanford.edu> Date: Thu, 17 Oct 1996 14:34:57 GMT References: <1996Oct16.131757.5954@uu.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Oct16.131757.5954@uu.net>, jnilsson@uu.net (Ji-woo Nilsson) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Fiona Takahashi "Extraordinary claims require extraordinary spectra." Sun 3/60 (SunOS 4.1.1) / TOS 4.04 From jsantos@panix.com Fri Oct 18 08:39:57 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!jsantos From: jsantos@panix.com (Jens Santos) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Oct18.083957.8836@panix.com> Date: Fri, 18 Oct 1996 08:39:57 GMT References: <1996Oct16.131757.5954@uu.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Oct16.131757.5954@uu.net>, jnilsson@uu.net (Ji-woo Nilsson) 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. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Jens Santos -- Public Access Unix of New York "There are 14 nodes and only 10 countries. Count again." From hstewart@unam.mx Sat Oct 19 23:12:57 1996 Path: ashpoly!cascade!transat!ukc!fennimore!unam!hstewart From: hstewart@unam.mx (Hugo Stewart) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Oct19.231257.6550@unam.mx> Date: Sat, 19 Oct 1996 23:12:57 GMT References: <1996Oct16.131757.5954@uu.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Oct16.131757.5954@uu.net>, jnilsson@uu.net (Ji-woo Nilsson) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Hugo Stewart | hstewart@unam.mx PGP Key fingerprint: C06A 13B2 4791 EDD9 "Keep the channels open." From jgirard@clari.net Sun Oct 20 02:19:57 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!clari!jgirard From: jgirard@clari.net (Ji-woo Girard) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Oct20.021957.3865@clari.net> Date: Sun, 20 Oct 1996 02:19:57 GMT References: <1996Oct16.131757.5954@uu.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Oct16.131757.5954@uu.net>, jnilsson@uu.net (Ji-woo Nilsson) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Ji-woo Girard -- ClariNet Communications Corp "5 sigma is a discovery. 7 is a question."