constant prediction see this page http://flac.sourceforge.net/format.html oversampling.. i maean digitally change the wave file rate form 44khz to 440 khz it make next sample easyer predictable if i'll found my old work i'll tell you how much compression i could achieve
--- Hod McWuff <hod@wuff.dhs.org> wrote:> On Fri, 2002-10-04 at 10:26, Marco "elcabesa" Belli wrote: > > oversampling.. i maean digitally change the wave file rate form > 44khz to 440 > > khz > > > > it make next sample easyer predictable > > OK, IANASPE (signal processing engineer) but it seems to me that if a > simple shift like that can improve the compression ratio, then > shortening the default block size will have the same effect.seems like it would, unless the dictionary overhead was significantly less than the FLAC frame overhead. as an experiment it is interesting but is probably not practical wrt. FLAC. it doesn't sound like it would be an improvement since you are multiplying the input size by 10 in exchange for making it more predictable. even if it does work, oversampling in the encoder and the inverse in the decoder are expensive. Josh __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com
OK, IANASPE (signal processing engineer) but it seems to me that if a simple shift like that can improve the compression ratio, then shortening the default block size will have the same effect. Confirm or refute, anyone? On Fri, 2002-10-04 at 10:26, Marco "elcabesa" Belli wrote:> constant prediction > see this page > http://flac.sourceforge.net/format.html > > oversampling.. i maean digitally change the wave file rate form 44khz to 440 > khz > > it make next sample easyer predictable > if i'll found my old work i'll tell you how much compression i could achieve > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > Flac-dev mailing list > Flac-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flac-dev