From ychoi@stanford.edu Mon Mar 27 13:34:40 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!ychoi From: ychoi@stanford.edu (Yuki Choi) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar27.133440.2954@stanford.edu> Date: Mon, 27 Mar 1995 13:34:40 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N 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. 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? -- === Yuki Choi === Dept of Electrical Engineering, Stanford University Computer Systems Lab "Hold for relay." From ksouza@uu.net Wed Mar 29 11:31:40 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!ksouza From: ksouza@uu.net (Katrin Souza) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar29.113140.4748@uu.net> Date: Wed, 29 Mar 1995 11:31:40 GMT References: <1995Mar27.133440.2954@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Mar27.133440.2954@stanford.edu>, ychoi@stanford.edu (Yuki Choi) 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. -- Katrin Souza Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA. ------------------------------------------------------------ From gsmirnov@unam.mx Thu Mar 30 16:39:40 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!gsmirnov From: gsmirnov@unam.mx (Göran Smirnov) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar30.163940.3348@unam.mx> Date: Thu, 30 Mar 1995 16:39:40 GMT References: <1995Mar27.133440.2954@stanford.edu> <1995Mar29.113140.4748@uu.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Mar29.113140.4748@uu.net>, ksouza@uu.net (Katrin Souza) 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. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Göran Smirnov -- Universidad Nacional Autónoma de México (DGSCA) "5 sigma is a discovery. 7 is a question." From msouza@inria.fr Sat Apr 01 13:41:40 1995 Path: ashpoly!cascade!mxgate!coyoacan!inria!msouza From: msouza@inria.fr (Marisol Souza) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr01.134140.7020@inria.fr> Date: Sat, 01 Apr 1995 13:41:40 GMT References: <1995Mar27.133440.2954@stanford.edu> <1995Mar29.113140.4748@uu.net> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Mar29.113140.4748@uu.net>, ksouza@uu.net (Katrin Souza) 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. You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. -- Marisol Souza Tape trading list upon request. SASE required for international mail. From kcampbell@clari.net Sun Apr 02 15:41:40 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!kcampbell From: kcampbell@clari.net (Karen Campbell) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr02.154140.5728@clari.net> Date: Sun, 02 Apr 1995 15:41:40 GMT References: <1995Mar27.133440.2954@stanford.edu> <1995Mar29.113140.4748@uu.net> <1995Apr01.134140.7020@inria.fr> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr01.134140.7020@inria.fr>, msouza@inria.fr (Marisol Souza) writes: > You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. 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. -- Karen Campbell Zyxel U-1496E @ ISDN 64k bps "5 sigma is a discovery. 7 is a question."