From rreyes@unam.mx Sun Jul 21 20:24:41 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!rreyes From: rreyes@unam.mx (Raj Reyes) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jul21.202441.6364@unam.mx> Date: Sun, 21 Jul 1996 20:24:41 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx 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. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Raj Reyes US Robotics Courier V.34 @ ISDN 64k bps "They will send a copy in my place." From kramirez@illinois.edu Tue Jul 23 19:26:41 1996 Path: ashpoly!cascade!mxgate!coyoacan!illinois!kramirez From: kramirez@illinois.edu (Kirsty Ramírez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jul23.192641.7485@illinois.edu> Date: Tue, 23 Jul 1996 19:26:41 GMT References: <1996Jul21.202441.6364@unam.mx> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul21.202441.6364@unam.mx>, rreyes@unam.mx (Raj Reyes) 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! -- Kirsty Ramírez Hayes Optima 288 @ 33,600 bps "Measuring a record you own is listening, not piracy."