> >On Sun, 1 Nov 1998, Rodney Arne Karlsen wrote: > >> I think if you converted the audio to 1bit information like in an audio CD >> that would bring down the size. 1 bit vs. 16 bit at same quality. I am not >> shure how the 1 bit DAC works, baybe somone in the group could explain it to >> us. I'm just beginning to grok DSP, and this is one aspect of it. There are some methods for doing D/A conversion which invlove downsampling from 16bits to 1 bit but at a much higher rate, this stream can then be low-pass filtered directly to get audio. The advantage is that more of the process can be integrated into digital circuitry. No audio space saving is done. >I'm not sure about how 1-bit DAC works, either, although I suspect that it >is something that decreases a manufacturer's costs more than it increases >sounds quality. I think they put it on portable CD players for purely >marketing reasons, eg. "Now with 1-bit DAC and Fritzen Jammin circuits!" >In any case, CDs still store the audio information in 16 bit per sample >per channel, 44,000 (or is it 48,000? I forget) samples per second. Sum >total: about 10MB per minute of music. <snip> > >Paul Archer > >---------------------------------------------------- >A key to the understanding of all religion is that >a god's idea of amusement is Snakes And Ladders with >greased rungs. -- Terry Pratchett, "Wyrd Sisters" >---------------------------------------------------- -- Eric LaForest Nascent Linux Borg -www.ncf.carleton.ca/~di458- #define Hacker !(Cracker) //FYI: http://sagan.earthspace.net/~esr/ Breaking into computers does not make one a hacker, for the same reasons that hotwiring cars does not make one a mechanic... paraphr. from ESR -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.ml.org
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