Hello I just wrote a little application using speex. I am compressing and packing singel frames to transmit them. Now I read in the manual, that it's possible to achieve higher bit rates by packing more than one frames at once. Unfortunately there is no table included at the manual, that shows the "real" bitrates of ultra wide band mode. So my question is: Can someone provide that information? (or any hints how to compute it) Thanks, Matthias
Have a look at the wideband table and add 1.8 kbps to each mode. Eventually, I'll also add an uwb table in there, but that's a good trick in the mean time. Jean-Marc matthiaspohl@web.de a ?crit :> Hello > > I just wrote a little application using speex. I am compressing and > packing singel frames to transmit them. Now I read in the manual, > that it's possible to achieve higher bit rates by packing more than > one frames at once. Unfortunately there is no table included at the > manual, that shows the "real" bitrates of ultra wide band mode. So my > question is: Can someone provide that information? (or any hints how > to compute it) > > > Thanks, > > Matthias _______________________________________________ Speex-dev > mailing list Speex-dev@xiph.org > http://lists.xiph.org/mailman/listinfo/speex-dev > >
Hi, With regards to adding 1.8 kbps to the bit rates in the wideband table to get the respective ultra-wideband bit rates, this words for all the bit rates I tested except the lowest. Adding 1.8 kbps to 3950 bps should give 5750 bps, but the encoder reports 4150. The encoder reports the expected rate for all other bit rates that I tested, eg: 5750 + 1800 = 7750. I am using the (recommended) current unstable release (v1.2rc1). Is this behaviour as it should be? $ ./speexenc --version speexenc (Speex encoder) version 1.2rc1 (compiled Sep 8 2009) Copyright (C) 2002-2006 Jean-Marc Valin $ ./speexenc --ultra-wideband --bitrate 5750 -V tmp.wav out.spx Encoding 32000 Hz audio using ultra-wideband (sub-band CELP) mode (mono) Bitrate is use: 4150 bps $ ./speexenc --ultra-wideband --bitrate 7750 -V tmp.wav out.spx Encoding 32000 Hz audio using ultra-wideband (sub-band CELP) mode (mono) Bitrate is use: 7550 bps -Konrad -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20090908/587661e9/attachment.htm