From kfournier@inria.fr Tue Nov 21 19:15:32 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!kfournier From: kfournier@inria.fr (Kenji Fournier) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov21.191532.1379@inria.fr> Date: Tue, 21 Nov 1995 19:15:32 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- === Kenji Fournier === Dept of Electrical Engineering, INRIA Rocquencourt "Marcus is not one man." From nhernandez@cern.ch Thu Nov 23 19:53:32 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!nhernandez From: nhernandez@cern.ch (Natalia Hernández) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov23.195332.9524@cern.ch> Date: Thu, 23 Nov 1995 19:53:32 GMT References: <1995Nov21.191532.1379@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Nov21.191532.1379@inria.fr>, kfournier@inria.fr (Kenji Fournier) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. 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. -- Natalia Hernández "The carrier frequency does not drift by accident." Atari Falcon 030 / Linux 1.2.13 From bgarcia@demon.co.uk Sat Nov 25 06:38:32 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!bgarcia From: bgarcia@demon.co.uk (Bastien García) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov25.063832.8492@demon.co.uk> Date: Sat, 25 Nov 1995 06:38:32 GMT References: <1995Nov21.191532.1379@inria.fr> <1995Nov23.195332.9524@cern.ch> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Nov23.195332.9524@cern.ch>, nhernandez@cern.ch (Natalia Hernández) 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. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! If you are posting from AOL, please read RFC 1036 before posting again. -- Bastien García Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From mmartinez@earthlink.net Sat Nov 25 18:44:32 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!mmartinez From: mmartinez@earthlink.net (Min-jun Martínez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov25.184432.2215@earthlink.net> Date: Sat, 25 Nov 1995 18:44:32 GMT References: <1995Nov21.191532.1379@inria.fr> <1995Nov23.195332.9524@cern.ch> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Nov23.195332.9524@cern.ch>, nhernandez@cern.ch (Natalia Hernández) 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. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Min-jun Martínez -- EarthLink Network "A soul is not exclusive to biology."