similar to: optimisation

Sorry for starting another topic, this is actually a reply to Segher's post on Sun Oct 22 on the 'mdct question' topic. I wasn't subscribed properly and so I didn't get email confirmation and thus can't add to that thread. So Segher, if the equation is indeed what you say it is, then replacing mdct_backward with this version should work, but it doesn't. Am I applying

Some thoughts for the new year: 1) MDCT is good for image coding 2) image coding and audio coding are two very different things 3) combine 1 and 2 4) if a psycho model is good, after leaving out what it tells you you can without hurting quality, applying the same model should yield the same results as you got before 5) from 4: decode -> encode -> decode should result in (almost) the

Hi all, The decoder is down 30% execution time, identical bit output. Didn't get the mdct yet; 1024 point mdct is a bit much to brute-force, and I'm not going to hand-unroll the whole thing either (the machine- unrolled version produced a 1.5M executable; understandably, it wasn't very fast. Still waiting for processors with 1.5M L1 code caches ;-) Slowest parts now are: -- mdct --

No offense, Segher, but the output quality of this thing is awful. =) I'll disregard the fact that, at least with *my* compiler, the source tarball I downloaded reduces every packet to zero bytes, which isn't terribly interesting. I decided to set the byte reduction to something constant: I started by dividing each packet's size by 2 just to see what would happen. The resulting ogg

I saw some mail go by a bit ago about doubles-vs-floats, but I seem to have lost it. I'm interested in rewriting the mdct code using Altivec on MacOS X. Altivec doesn't support doubles, though -- the only floating point vector type is single precision floats. Vorbis currently has doubles everywhere -- is this really necessary? Doubles are supposedly faster than floats in the PPC

Thread-split from the vorbis-mailing list ("Vorbis determined to be as good as MPC at 128 kbps!") <p>On Sun, 30 May 2004, Segher Boessenkool wrote: [Steven So] SS>> If iTunes AAC can encode castanets with much less pre-echo at SS>> ABR 128 kbps, then hopefully there will be an imaginative SS>> (and non-patented) way of doing this in Vorbis without the SS>>

I found this sentence in the Ogg format specs: http://www.xiph.org/ogg/vorbis/doc/vorbis-spec-res.html "A residue vector may represent spectral lines, spectral magnitude, spectral phase or hybrids as mixed by channel coupling." But where does the spectral phase information come from ? AFAIK MDCT doesn't provide any phase information. And in OGG-encoding, MDCT is taking place a few

Frank Klemm made the clip to test short block switching - it's made of series of short periodical 'pulses', and this period gets smaller as time passes. You can get this file at: http://www.uni-jena.de/~pfk/Short_Block_Test.wav.gz.gz (1.6MB) (uncompress it twice with gzip) I used oggenc beta3 & mp+ 1.7.8 Oggenc gave 160kbps using mode -b 256 mp+ gave 350kbps (using

On Fri, Jul 20, 2001 at 11:27:16AM +0500, Asif M. Baloch wrote: > Hi guys, > > ICE cast resembles shoutcast, thats for sure and its good that its open > source. But, it has too many probs. I ran it on a dual p3 800 with a T3 comm We are running icecast on linux 2.2.19 serving more than 600gb each months and it has been rock stable so fare. Right now our uptime is around 3 months.

Thomas, You should post this hear, as it's just as relevant ;) Hey guys, how do you feel now that you all owe Thompson $2k per year? Vorbis look more interesting now :) It's really disgusting how the technology is now worth more than the music. jack. ----- Forwarded message from Thomas Kirk <thomas@arkena.com> ----- Date: Sat, 9 Jun 2001 11:58:23 +0200 From: Thomas Kirk

Hep Trying to get pfifo to work. Setup : |------|<--->eth1 (192.168.10.0/24) eth0---| GW |<--->eth2 (192.168.11.0/24) |------|<--->eth3 (192.168.12.0/24) read all documentation : http://lartc.org/howto/lartc.cookbook.interactive-prio.html here is my TOS mangling rulse in iptables : $IPTABLES -A PREROUTING -i eth1 -t mangle -s 192.168.10.0/24 -p tcp --dport

On Mon, Jun 03, 2002 at 01:19:31AM +1000, Geoff Shang wrote: > hmmm. I was told only win media 7.x played MP3 streams properly. Not really. Use winamp to connect to your stream. Save bookmark on your stream as m3u on desktop. Shut down winamp fire up WMP 6.4 or newer and drag m3u into it and watch your stream getting played by windows media player ;-) Websolution do the same but place m3u on

Hey there listmembers! Two realying questions : 1) Have anyone out there tested how many relays a single icecast 1.3.10 server can serv? Ive been doing tests with the amount of sourcestreams a icecastserver can handle but not realys? 2) Bug in icecast 1.3.10 adding more than one realy in the alias list in icecast.conf will make icecast realying the first source in aliaslist

I launched a Ogg vorbis test stream on a good connection. Feel free to check it out! Be warned though its 128kbps and consist mainly of electronic music. Ogg Vorbis streaming : http://mik.mmstreaming.com:8004/test.ogg I'll update the playlist as i get around to it ;-) Enjoy the music! -- Venlig hilsen/Kind regards Thomas Kirk ARKENA thomas@arkena.com http://www.arkena.com If God had

I launched a Ogg vorbis test stream on a good connection. Feel free to check it out! Be warned though its 128kbps and consist mainly of electronic music. Ogg Vorbis streaming : http://mik.mmstreaming.com:8004/test.ogg I'll update the playlist as i get around to it ;-) Enjoy the music! -- Venlig hilsen/Kind regards Thomas Kirk ARKENA thomas@arkena.com http://www.arkena.com If God had

Hello all, Finally I succeeded in uploading the test case I promised. It's at http://home.wanadoo.nl/segher/test1.wav.bz2 (It is a wav, the headers are a bit inconsistent, but encoder_example will be ok with it, as it just skips them). I did some thinking, and a possible solution is decreasing the ATH_Bark_dB[] for the lower frequencies. As the comments say, it's not really an ATH, but

On Thu, May 15, 2003 at 10:01:57AM -0600, Jack Moffitt wrote: > You apparently didn't see: http://xiph.helixcommunity.org :) apparently not :) The page says : "This is a workspace for all parties to work on integrating the Ogg Vorbis format and audio codec with the Helix DNA Client." What about serverside of it? -- Venlig hilsen/Kind regards Thomas Kirk ARKENA tlf/phone

Hey On Sun, May 19, 2002 at 01:14:43PM -0700, Nicolae wrote: > I noticed that RealPlayer plays shoutcast streams along with > mp3 players but not with MEDIA Player. (lame a** M$). Thats one of the reasons whey people should use Icecast (Read OPEN SOURCE!). Using Icecast you actually have the posibility to get all those mediaplayers out there working with those fucked up players. Jack

Hep On Fri, May 16, 2003 at 12:04:43AM +1000, Michael Smith wrote: > For entirely different reasons, an RTSP implementation in icecast would be a > Very Good Thing, but it's an extremely large task. I don't think anyone has > tried yet. Maybe another and easier way would be to implement the ogg vorbis format in Real Networks "open sourced" Helix streaming server

> From: "JD Conley" <jdc@malibuboats.com> > To: "'vorbis@xiph.org'" <vorbis@xiph.org> > Subject: RE: [vorbis] new MS codecs > Date: Thu, 14 Dec 2000 10:49:58 -0800 > X-Mailer: Internet Mail Service (5.5.2653.19) > Reply-To: vorbis@xiph.org > > Oh yeah, they have some samples on their site. Interestingly enough, they > don't