similar to: Re: Tr: patent free format

I was wondering about Vorbis compatibility. It seems that wavelets and joint-stereo could be introduced later on Vorbis. I know the specifications are now frozen, but there is no real spec docs yet. So will the vorbis players still be able to decode Vorbis once joint or wavelet will be introduced, or will they need to be updated? Regards, -- Gabriel Bouvigne - France bouvigne@mp3-tech.org

I've got an idea for joint multichannel coding. Here is my idea: My idea is a process for coding 2,3,4 or 5 combined channels, in a compatible way for decoders unable to deal with combined channels. part1: All channels to be coded are summed, each one effected by a coefficient related to its sound power importance for the listener. The sum of all channels is devided by the square root of the

I'm doing a non linear regression with 8 parameters to be fitted: J.Tl.nls<-nls(Gw~(a1/(1+exp(-a2*Tl+a3))+a4)*(b1/(1+exp(b2*Tl-b3))+b4),data=Enveloppe, start=list(a1=0.88957,a2=0.36298,a3=10.59241,a4=0.26308, b1=0.391268,b2=1.041856,b3=0.391268,b4=0.03439)) First, I fitted my curve on my data by guessing the parameters'

On 20030610: Gregory Maxwell wrote: (in reply to Ralph Giles) >> I assume you're aware of the technical documentation on dolby's site? >> (http://www.dolby.com/pro/) In particular the surround mixing guide has >> a lot of detailed guidelines. I don't have any practical experience >> with it though, so I can't vouch for it. >Yes I am. I've done a

Arc wrote: > Ok so we cap it to 64bit, since much more than that doesn't make sense (96bit > would be a "long double" C type) On x86 CPUs, "long double" is 80 bits. > I really don't like this idea, but I will entertain, formatting it as follows: > > ID Type Bits > 0 Int 8 > 1 uInt 8 > 2 Int 16 > 3 Int 24 > 4 Int

First: I am not a lawyer, this is no legal advice! On 16 May 2017, at 0:25, Robert Jeffares wrote: > Jack, > > I am using AAC+ encoded by Darkice and distributed on Icecast2 on a > Ubuntu server. I had to install a number of open source libraries and > compile darkice from source. No licence. This sounds like it would violate the license, given that the FAQ on

I noticed that my previous message is not very complete so I send here an "enhanced version". Please disregard the old one an reply to this one only. ( you can delete the ATTENTION word from subject ) Wilson (defiler@null.net) wrote : > There are two ways to decode multi-channel audio. In hardware, or in > software. > Hardware: A receiver or processor takes a Dolby Digital

As far as I know, LAME is able to mantain the informations stored in some audio files in the lower frequencies, useful for a Dolby pro logic decoder to reproduce a surround sound. Is ogg able to do it? Olaf <olaf@ kjws.com> for every kind of mail, except spam! :-) --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe

Jared (jared@celab21.students.csee.uq.edu.au) wrote : > Saw an article today on /. which reports that Dolby are insisting the > NETBSD dudes remove the ac3dec package from their site. Someone suggested > that we need an open source solution. ac3dec is already open ( GPL ). > Could Vorbis in the Ogg framework be this solution, can we create a pretty > simple 5.1 stream? I

It's really pretty simple. You can download the code and build it all you want... ...for yourself. It cannot be distributed, sold, or used commercially in any way. That's all. /g. -----Original Message----- From: Icecast [mailto:icecast-bounces at xiph.org] On Behalf Of Robert Jeffares Sent: Tuesday, 16 May, 2017 17:03 To: icecast at xiph.org Subject: Re: [Icecast] Frauenhofer signing

Hi there ! I checked Vorbis' performace for mono files at approx. 64-80 kbps (it does a good job) and I'm wondering why the current OggEnc still uses Point-Stereo (>10kHz) for -q4 and -q5 I know, we're usually unable to percieve those phase correlations above 10 kHz, But a Dolby Prologic Decoder isn't. I think a future version of OggEnc which is able to use a user-selectable

Hi folks, I'm trying to get a handle on the many lossless audio formats from the perspective of a software developer. I love the FLAC format because it is open source and it performs very well. But there is also the MLP (Meridian Lossless Packing), AAC (Apple Lossless), and probably some Microsoft format(s) that compete in the same feature set. These formats all achieve

We are using Speex as our major codec for voice application. We like the Speex solution so far. Currently, We have tried to compare voice quality between different public available VOIP solutions such as Skype and others. We notice Skype use higher CPU for signal processing. Is it because of this extra work the audio quality sounds clear? (Sometimes, it sounds like the audio signal is not real.

Hello all, I'm having some problems with the sound quality of recent Vorbis. There is some kind of metallic echo/tremolo effect in the lower frequencies. This is on my iMac; haven't seen this problem on x86. If you need a sample, I can put one up somewhere, or mail it to someone with a good ftp server, preferably. It could be caused by the iMac sound system doing surround sound, (Dolby

I am forwarding to the list a mail that I send to one of the subscribers, related to codecs comparison. Perhaps the material will be helpful to some of you. <p>Regards, <p> ---- Gabriel Bouvigne www.mp3-tech.org personal page: http://gabriel.mp3-tech.org <strong>attached mail follows:</strong><hr noshade> Hello I just looked at your vp3/mp4 comparison. In

Dear Vorbis Devteam, My name is Michael Feilen and I've been working on Digital Radio Mondiale (DRM) transmitters and receivers for quite a while now. DRM uses HE-AACv2 by Dolby to encode the audio content (see http://www.drm.org/uploads/media/es_201980v030101p.pdf - pages 23 ff). As I think Vorbis is an excellent alternative, I'd like to implement and define an interface for Vorbis

Hello to the list, and please forgive me if this has already been asked before. (I am new here, you see) The question is really simple: Can I use FLAC to create multichannel files, ranging from 3-channel LCR, through Quad, 4.1 to 5.1 and possibly (later) above? The projects details are essentially this: DVD-Audio, containing MLP Lossless in stereo & surround/multichannel. Video_TS folder

----- Forwarded message from Mark Lewis <mlewis@webnoize.com> ----- Delivery-Date: Tue Nov 21 10:15:55 2000 Date: Tue, 21 Nov 2000 10:07:15 -0800 From: Mark Lewis <mlewis@webnoize.com> Reply-To: mlewis@webnoize.com Organization: Webnoize News X-Mailer: Mozilla 4.75 [en] (Win98; U) To: monty@xiph.org Subject: liked your article at http://xiph.org/about.html here's an article about

On Jan 17, 2013, at 21:41, Ralph Giles wrote: > On 13-01-17 7:26 PM, Brian Willoughby wrote: >> I vote for documenting the --channel-map option in the --help > > Do you ever use --channel-map yourself, or recommend it to clients? Professional surround mastering is delivered on very specific media, and FLAC is not an option (to my knowledge). I use FLAC for archival of original

Arc wrote: > However, support for (ie) 48-bit-float should not have to be created, Where are you going to find a 48 bit float? Is there an IEEE standard for that? I know some floating point DSP chips use a 48 bit float internally, but if there is more than one they are unlikely to be compatible and they certainly cannot be read by standard CPUs without having pull each value apart into