At 12:35 PM 10/6/2004, Matthias Granberry wrote:>There is some SSE assembly >language, but it's in GCC/AT&T syntax rather than the windows-standard >Intel syntax, so you might have to do some of your own translation to >something your compiler understands.We submitted an intel patch a ways back- maybe it is in the archives somewhere... Tom -- Tom Harper - tharper@sightspeed.com Lead Software Engineer SightSpeed, Inc. 918 Parker St, Suite A14 Berkeley, CA 94710 Phone: 510.665.2920 Cell: 415.378.3779 web: http://www.sightspeed.com video: http://tom.sightspeed.com/
? is there any speex code in place that may help enable variable speed playback ? or perhaps another open source project has some code for this ? variable speed playback for voice messaging is an attractive feature, that would be well recieved for sure ! thx for any reply, Mark Tom Harper <tharper@sightspeed.com> wrote: At 12:35 PM 10/6/2004, Matthias Granberry wrote:>There is some SSE assembly >language, but it's in GCC/AT&T syntax rather than the windows-standard >Intel syntax, so you might have to do some of your own translation to >something your compiler understands.We submitted an intel patch a ways back- maybe it is in the archives somewhere... Tom -- Tom Harper - tharper@sightspeed.com Lead Software Engineer SightSpeed, Inc. 918 Parker St, Suite A14 Berkeley, CA 94710 Phone: 510.665.2920 Cell: 415.378.3779 web: http://www.sightspeed.com video: http://tom.sightspeed.com/ _______________________________________________ Speex-dev mailing list Speex-dev@xiph.org http://lists.xiph.org/mailman/listinfo/speex-dev --------------------------------- Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20041006/f32b40e2/attachment.html
The poor man's method is to play the file back at a sped other than what you originally recorded. I.E. record at 16khz, play back at 22050. This is independent of speex. mark spowage <spowage@yahoo.com> writes:> ? Is there any speex code in place that may help enable variable speed > playback ? > Or perhaps another open source project has some code for this ? > > Variable speed playback for voice messaging is an attractive feature, > that would be > well recieved for sure ! > > Thx for any reply, > > Mark > > Tom Harper <tharper@sightspeed.com> wrote: > At 12:35 PM 10/6/2004, Matthias Granberry wrote: >>There is some SSE assembly >>language, but it's in GCC/AT&T syntax rather than the > windows-standard >>Intel syntax, so you might have to do some of your own translation to >>something your compiler understands. > > We submitted an intel patch a ways back- maybe it is in the archives > somewhere... > > Tom > > -- > > Tom Harper - tharper@sightspeed.com > Lead Software Engineer > > Sightspeed, Inc. > 918 Parker St, Suite A14 > Berkeley, CA 94710 > Phone: 510.665.2920 > Cell: 415.378.3779 > > Web: http://www.sightspeed.com > video: http://tom.sightspeed.com/ > > _______________________________________________ > Speex-dev mailing list > Speex-dev@xiph.org > http://lists.xiph.org/mailman/listinfo/speex-dev > > --------------------------------- > Do you Yahoo!? > Yahoo! Mail Address AutoComplete - You start. We finish._______________________________________________ > Speex-dev mailing list > Speex-dev@xiph.org > http://lists.xiph.org/mailman/listinfo/speex-dev-- Matthias Granberry matthias@utdallas.edu (972)644-3580
Jean-Marc Valin
2004-Oct-08 10:47 UTC
[Speex-dev] Cpu bandwidth for Speex on Win32 platforms
On mer, 2004-10-06 at 12:53 -0700, Tom Harper wrote:> At 12:35 PM 10/6/2004, Matthias Granberry wrote: > >There is some SSE assembly > >language, but it's in GCC/AT&T syntax rather than the windows-standard > >Intel syntax, so you might have to do some of your own translation to > >something your compiler understands. > > We submitted an intel patch a ways back- maybe it is in the archives > somewhere...If you pick up the latest 1.1 (1.1.6), all the SSE asm has been rewritten as intrinsics, so it should work on any CPU that supports them. Jean-Marc
Hi, I don't think code exists, but easy to implement techniques do. Try looking up time domain harmonic scaling (TDHS) or pitch synchronous overlap and add (PSOLA). These provide variable speed without a pitch change. Take care using PSOLA - France Telecom has patents on it. The overlap and add part is very simple to implement, but you really want to sync to the F0 contour of the voice for best results. That takes some real work with linear voice data. However, with most low bit speech codecs, speex included, the pitch information you need is already in the data. So, if you take the speex pitch information, decode the speex to linear samples, and then apply the overlap and add technique synced to the F0 cycles you get pretty nice results. I've done this in digital answering machines in the past using another CELP based codec. Regards, Steve mark spowage wrote:> ? is there any speex code in place that may help enable variable speed > playback ? > or perhaps another open source project has some code for this ? > > variable speed playback for voice messaging is an attractive feature, > that would be > well recieved for sure ! > > thx for any reply, > > Mark > > */Tom Harper <tharper@sightspeed.com>/* wrote: > > At 12:35 PM 10/6/2004, Matthias Granberry wrote: > >There is some SSE assembly > >language, but it's in GCC/AT&T syntax rather than the > windows-standard > >Intel syntax, so you might have to do some of your own translation to > >something your compiler understands. > > We submitted an intel patch a ways back- maybe it is in the archives > somewhere... > > Tom > > > > -- > > Tom Harper - tharper@sightspeed.com > Lead Software Engineer > > SightSpeed, Inc. > 918 Parker St, Suite A14 > Berkeley, CA 94710 > Phone: 510.665.2920 > Cell: 415.378.3779 > > web: http://www.sightspeed.com > video: http://tom.sightspeed.com/ > > > _______________________________________________ > Speex-dev mailing list > Speex-dev@xiph.org > http://lists.xiph.org/mailman/listinfo/speex-dev > > ------------------------------------------------------------------------ > Do you Yahoo!? > Yahoo! Mail Address AutoComplete > <http://us.rd.yahoo.com/mail_us/taglines/aac/*http://promotions.yahoo.com/new_mail/static/ease.html> > - You start. We finish. > >------------------------------------------------------------------------ > >_______________________________________________ >Speex-dev mailing list >Speex-dev@xiph.org >http://lists.xiph.org/mailman/listinfo/speex-dev > >