From teriksson@kiae.su Sat Apr 16 15:50:37 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!teriksson From: teriksson@kiae.su (Tyler Eriksson) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Apr16.155037.8906@kiae.su> Date: Sat, 16 Apr 1994 15:50:37 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 10 A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width. At 14.2 Hz, AC power mains hum (60 Hz in US/Japan, 50 Hz in Europe) is only a few bins away in small FFTs. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- Tyler Eriksson -- Kurchatov Institute of Atomic Energy, Moscow "When every node is whole, the channel opens." From tbrennan@pacbell.net Mon Apr 18 06:52:37 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!tbrennan From: tbrennan@pacbell.net (Takeshi Brennan) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Apr18.065237.7990@pacbell.net> Date: Mon, 18 Apr 1994 06:52:37 GMT References: <1994Apr16.155037.8906@kiae.su> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Apr16.155037.8906@kiae.su>, teriksson@kiae.su (Tyler Eriksson) writes: > A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. PGP Public key available via finger or upon request. -- Takeshi Brennan "When every node is whole, the channel opens." Pentium 90 (OS/2 Warp) / SunOS 4.1.4 From tandersson@netcom.com Mon Apr 18 09:16:37 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!tandersson From: tandersson@netcom.com (Tomas Andersson) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Apr18.091637.5261@netcom.com> Date: Mon, 18 Apr 1994 09:16:37 GMT References: <1994Apr16.155037.8906@kiae.su> <1994Apr18.065237.7990@pacbell.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Apr18.065237.7990@pacbell.net>, tbrennan@pacbell.net (Takeshi Brennan) writes: > Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. > PGP Public key available via finger or upon request. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- === Tomas Andersson === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Extraordinary claims require extraordinary spectra." From tmoreno@mindspring.com Mon Apr 18 15:55:37 1994 Path: ashpoly!cascade!bigsur!mindspring!tmoreno From: tmoreno@mindspring.com (Tyler Moreno) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Apr18.155537.3538@mindspring.com> Date: Mon, 18 Apr 1994 15:55:37 GMT References: <1994Apr16.155037.8906@kiae.su> <1994Apr18.065237.7990@pacbell.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Apr18.065237.7990@pacbell.net>, tbrennan@pacbell.net (Takeshi Brennan) writes: > Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. > PGP Public key available via finger or upon request. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Tyler Moreno === Dept of Electrical Engineering, MindSpring Enterprises "Hardware is temporary. The signal survives." From blindqvist@rwth-aachen.de Tue Apr 19 00:44:37 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!blindqvist From: blindqvist@rwth-aachen.de (Brian Lindqvist) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Apr19.004437.5753@rwth-aachen.de> Date: Tue, 19 Apr 1994 00:44:37 GMT References: <1994Apr16.155037.8906@kiae.su> <1994Apr18.065237.7990@pacbell.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Apr18.065237.7990@pacbell.net>, tbrennan@pacbell.net (Takeshi Brennan) writes: > Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. > PGP Public key available via finger or upon request. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- === Brian Lindqvist === Dept of Electrical Engineering, RWTH Aachen Informatik "5 sigma is a discovery. 7 is a question."