From kmoreno@delphi.com Wed Jul 26 07:57:51 1995 Path: ashpoly!cascade!mxgate!coyoacan!delphi!kmoreno From: kmoreno@delphi.com (Kenji Moreno) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul26.075751.9103@delphi.com> Date: Wed, 26 Jul 1995 07:57:51 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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). The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Kenji Moreno | kmoreno@delphi.com PGP Key fingerprint: C85A B70B 4698 0D8D "Keep the channels open." From divanov@utexas.edu Thu Jul 27 07:45:51 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!divanov From: divanov@utexas.edu (Dong-hyun Ivanov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul27.074551.3489@utexas.edu> Date: Thu, 27 Jul 1995 07:45:51 GMT References: <1995Jul26.075751.9103@delphi.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Jul26.075751.9103@delphi.com>, kmoreno@delphi.com (Kenji Moreno) 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Dong-hyun Ivanov US Robotics Courier V.34 @ 14,400 bps "The carrier frequency does not drift by accident."