It seems to work ok with the same audible quality as a standard sampling rate. Is there any way to test this? Will superimposing an inverse wave over the origional produce a meaningfull result? Thanks for your time, Ryan de Leeuw <p><p>>Sorry for the delay. I've been doing a couple tests>and what I'd suggest >is encoding using the narrowband (8 kHz normally) >mode even though your >data is at 11.025 kHz. It won't work for wav input >(for now) but it will >work for raw audio. Note that your mileage may vary >depending on the >input. There may be some noise in the high (~5 kHz) >band, mostly is >there is lots of energy in the low-band (you may want >to slightly >high-pass). This is because it's sometimes hard to >encode audio when >there's a high energy difference (80-100 dB) between >low frequencies and >high frequencies. > > > Jean-Marc > > > >-- >Jean-Marc Valin, M.Sc.A. >LABORIUS (http://www.gel.usherb.ca/laborius) >Université de Sherbrooke, Québec, Canada<p><p><p>__________________________________________________ Do you Yahoo!? Y! Web Hosting - Let the expert host your web site http://webhosting.yahoo.com/ --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Le mar 22/10/2002 à 21:29, Ryan dl a écrit :> It seems to work ok with the same audible quality as a > standard sampling rate. Is there any way to test this? > Will superimposing an inverse wave over the origional > produce a meaningfull result? Thanks for your time,This would allow you to measure SNR, as long as you compensate the 80-sample delay (223 for wideband) introduced by Speex. However, SNR is not everything. Speex does not try to optimize SNR but perceptual quality, so the best thing to do is always to listen to it. Jean-Marc -- Jean-Marc Valin, M.Sc.A. LABORIUS (http://www.gel.usherb.ca/laborius) Université de Sherbrooke, Québec, Canada -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 242 bytes Desc: signature.asc Url : http://lists.xiph.org/pipermail/speex-dev/attachments/20021022/6e015ac0/signature-0001.pgp