From ylarsson@cmu.edu Thu Oct 05 19:25:54 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!ylarsson From: ylarsson@cmu.edu (Yuki Larsson) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct05.192554.8502@cmu.edu> Date: Thu, 05 Oct 1995 19:25:54 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Yuki Larsson US Robotics Courier V.34 @ 9600 Telebit bps "Row 14. No joke." From rperez@tum.de Thu Oct 05 20:16:54 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!rperez From: rperez@tum.de (Raj Pérez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct05.201654.9664@tum.de> Date: Thu, 05 Oct 1995 20:16:54 GMT References: <1995Oct05.192554.8502@cmu.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Oct05.192554.8502@cmu.edu>, ylarsson@cmu.edu (Yuki Larsson) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Raj Pérez "The hatch is open. Is anyone listening?" Amiga 1200 (Blizzard 030/50) / FreeBSD 2.1