Maybe Monty will make a video about it one day and we will all understand it. ;-) Silvia. On Tue, Mar 19, 2013 at 3:22 PM, Benjamin Schwartz <ben at bemasc.net> wrote:> Presuming that you are asking regarding the Ogg Vorbis audio format, the > correct answer is: there is no minimum or maximum cutoff frequency. Vorbis > can code all frequencies from DC to Nyquist. What Vorbis will actually do > is extremely complex, extremely nonlinear, and highly dependent on > bitrate. If you are in the mentality of linear time-invariant filters, you > will never be able to understand it. > > > On Mon, Mar 18, 2013 at 11:08 AM, Fernando Alberto Marengo Rodriguez < > fmarengorodriguez at yahoo.com.ar> wrote: > >> Dear list, >> Could you please tell me the values of the minimum and maximum cutoff >> frequencies for each coding version of the 44.1 kHz sampled data? For >> instance, are the values fmin=100 Hz and fmax=12 kHz valid? >> Thank you very much in advance. >> Kind regards, >> >> Fernando A. Marengo Rodriguez, PhD >> Post-doctoral fellow on Acoustics and Beamforming >> -- >> Laboratory of Noise and Vibration (LVA) >> Federal University of Santa Catarina (Brazil) >> -- >> Acoustics and Electroacoustics Laboratory >> School of Electronic Engineering >> National University of Rosario (Argentina) >> >> _______________________________________________ >> ogg-dev mailing list >> ogg-dev at xiph.org >> http://lists.xiph.org/mailman/listinfo/ogg-dev >> >> > > _______________________________________________ > ogg-dev mailing list > ogg-dev at xiph.org > http://lists.xiph.org/mailman/listinfo/ogg-dev > >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/ogg-dev/attachments/20130319/9e4eb286/attachment.htm
Fernando Alberto Marengo Rodriguez
2013-Mar-19 16:39 UTC
[ogg-dev] Min and max cutoff frequency
Oh, I will be very happy if I could see this video! Thank you very much Silvia. Kind regards, Fernando ________________________________ De: Silvia Pfeiffer <silvia at silvia-pfeiffer.de> Para: Benjamin Schwartz <ben at bemasc.net> CC: Fernando Alberto Marengo Rodriguez <fmarengorodriguez at yahoo.com.ar>; "ogg-dev at xiph.org" <ogg-dev at xiph.org>; Sergio Castells <canistells77 at hotmail.com> Enviado: martes, 19 de marzo de 2013 5:09 Asunto: Re: [ogg-dev] Min and max cutoff frequency Maybe Monty will make a video about it one day and we will all understand it. ;-) Silvia. On Tue, Mar 19, 2013 at 3:22 PM, Benjamin Schwartz <ben at bemasc.net> wrote: Presuming that you are asking regarding the Ogg Vorbis audio format, the correct answer is: there is no minimum or maximum cutoff frequency.? Vorbis can code all frequencies from DC to Nyquist.? What Vorbis will actually do is extremely complex, extremely nonlinear, and highly dependent on bitrate.? If you are in the mentality of linear time-invariant filters, you will never be able to understand it.> > > > >On Mon, Mar 18, 2013 at 11:08 AM, Fernando Alberto Marengo Rodriguez <fmarengorodriguez at yahoo.com.ar> wrote: > >Dear list, >>Could you please tell me the values of the minimum and maximum cutoff frequencies for each coding version of the 44.1 kHz sampled data? For instance, are the values fmin=100 Hz and fmax=12 kHz valid? >> >>Thank you very much in advance. >>Kind regards, >> >>? >>Fernando A. Marengo Rodriguez, PhD >>Post-doctoral fellow on Acoustics and Beamforming >>-- >>Laboratory of Noise and Vibration (LVA) >>Federal University of Santa Catarina (Brazil) >>-- >>Acoustics and Electroacoustics Laboratory >>School of Electronic Engineering >>National University of Rosario (Argentina) >> >>_______________________________________________ >>ogg-dev mailing list >>ogg-dev at xiph.org >>http://lists.xiph.org/mailman/listinfo/ogg-dev >> >> > >_______________________________________________ >ogg-dev mailing list >ogg-dev at xiph.org >http://lists.xiph.org/mailman/listinfo/ogg-dev > >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/ogg-dev/attachments/20130319/d184fce6/attachment.htm
> Presuming that you are asking regarding the Ogg Vorbis audio format, the > correct answer is: there is no minimum or maximum cutoff frequency. Vorbis > can code all frequencies from DC to Nyquist. What Vorbis will actually do > is extremely complex, extremely nonlinear, and highly dependent on bitrate. > If you are in the mentality of linear time-invariant filters, you will never > be able to understand it.Well, it's not quite that complex, but it is adaptive. There are no hard limits in the format. You can sometimes make a prediction based on the encoder and specific encoding mode... so, for what reason are you actually asking? Monty