Displaying 20 results from an estimated 2000 matches similar to: "multi-channel / ambisonics"
2004 Sep 10
3
2/0, 2/2 3/0, 3/2, 5.1, wxyz
i didn't find anything about tagging flac files as surround files. i
think there should some possibility to tell the player how to play a
multi-channel file (how to map the different channels to the speakers or
if there some decode is needed, like for ambisonic files).
any idea how to implement it?
2004 Sep 10
2
2/0, 2/2 3/0, 3/2, 5.1, wxyz
Josh Coalson wrote:
> --- smoerk <smoerk@gmx.de> wrote:
>
>>i didn't find anything about tagging flac files as surround files. i
>>think there should some possibility to tell the player how to play a
>>multi-channel file (how to map the different channels to the speakers
>>or if there some decode is needed, like for ambisonic files).
>
>
> it
2016 May 28
2
ambisonics formats and channel mappings
Hi Opus list.
I subscribed because your discussion on the IETF draft ("Ambisonics in
an Ogg Opus Container") was mentioned on the sursound list.
I tried Opus for ambisonics more than a year ago. It does works with
uncoupled channels (I had to patch the encoder). I don't know what else
could be done to optimize support for ambisonics, as I'm not a codec
expert.
So I think that
2002 Aug 06
1
Ambisonics
Hello,
ist it possible to encode Ambisonics with Ogg/Vorbis?
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2007 Jan 02
3
Decoding Type=Independent
On 1/2/07, Josh Coalson <xflac@yahoo.com> wrote:
> I'm not sure I understand... I think the INDEPENDENT you are referring
> to means the interchannel decorrelation method. this stage is before
> and independent of LPC analysis.
Correct.
> I'm not sure why "independent" frames would not decode correctly
> though. more info on exactly how it is not working
2004 Sep 10
4
[Flac-users] FLAC FAQ
I just uploaded a new FLAC FAQ:
http://flac.sourceforge.net/faq.html
Let me know if I forgot any common questions.
Josh
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2004 Sep 10
1
2/0, 2/2 3/0, 3/2, 5.1, wxyz
Curt Sampson wrote:
> On Sun, 24 Aug 2003, smoerk wrote:
>
>
>>there are different channel profiles for 5.1:
>>L R C LFE Ls Rs (DVD)
>>L R Ls Rs C LFE
>>L C R Ls Rs LFE (Film)
>
>
> I don't see why you need more than one of the above formats. It's not
> like you can't decide to put the LFE channel into "input 3" or "input
2007 Jan 01
2
Decoding Type=Independent
Hello, I am new to the list, to FLAC and to FLAC development but I am
having a problem in trying to make FLAC work with MediaMVP based the
mvpmc project (ref. http://www.wvpmc.org) that hopefully someone can
help me with. This device is possibly minimum spec. for a FLAC
decoder.
In any case, I have had some success cross-compiling libFLAC (without
the ogg or metadata modules).for the embedded
2009 Apr 14
3
technical questions about FLAC
Hey everyone,
I have a few questions about FLAC that aren't answered in the FAQ or the documentation. Maybe someone knows about these details.
1. What exactly is meant by "reference encoder"?
2. Concerning interchannel decorrelation, what is the point of creating separate signals, why not just keep the channels you have? For example, you might create "mid" and
2016 Apr 18
5
Channel Mapping Family for Ambisonics
Hello,
We (Google) have been experimenting with configuration and adjustments to
CELT-only Opus that give good results for compressing ambisonic audio
signals [1]. Based on our results so far, we would like to use Opus to
encode spatial audio. We hope to make it easy/possible to use libopus with
other common tools and software modules (ffmpeg/libav in particular).
Based on my reading of the
2009 Jan 30
1
echo_cancellation_api
Please,
I'm looking at speex rc1 echo_cancellation API docs and I
found there is now a funcion for doing decorrelation:
void speex_decorrelate(
SpeexDecorrState * st,
const spx_int16_t * in,
spx_int16_t * out,
int strength)
How does it fit to the speex_echo_cancellation function ?
When removing echo from multiple channels I need to
decorrelate the input mic first and
2016 May 29
2
ambisonics formats and channel mappings
On Sat, 28 May 2016 16:21:33 -0700,
Michael Graczyk <mgraczyk at google.com> wrote :
> Hi Marc,
Hi Micheal.
> On Sat, May 28, 2016 at 10:44 AM, Marc Lavallée <marc at hacklava.net>
> wrote:
> > I subscribed because your discussion on the IETF draft ("Ambisonics
> > in an Ogg Opus Container") was mentioned on the sursound list.
>
> Thanks for
2008 Oct 30
3
Multichannel echo cancellation
Dear all,
I have just implemented a gstreamer plugin for the Speex AEC,
but now I would like to extend it to a multichannel echo cancellation
I have been searching documentation about that but I could not find it
Where it is? If it doesn't exist? Could you add a short example showing
how do you think it should work?
or It's "just" necessary to:
init the multichannel echo
2004 Sep 10
4
Blocking and compression.
I did some research on patent claims on range and arithmetic coding. The
original range code pdf presented in the UK by an ibm employee at the
time asserts no patent claims what so ever. If there are patents I cant
find em. I have the original paper in PDF if anyone cares to see it. Its
a good candidate for encoding because browsing a few of the
implememntations avaialable on line, I can roll my
2006 Oct 09
2
understanding decorrelation
Hi FLACers
I'm studying music production and am currently doing an analysis of the FLAC format. If anyone has the knowledge and a minute to explain i would greatly appreciate any help. One thing that i cannot make sense from in the FLAC documentation (a thing that is hard to find info on in general) is how the decorrelation fase works exactly. I understand that the two channels in a stereo
2019 Dec 18
2
opusenc for ambisonics?
Hi Andrew,
I suspect that the configure option should be enable-ambisonics (instead
of enable_ambisonics), but for each of opus, libopusenc, opusfile and
opus-tools git repos (on master branch), when I try "./configure
--enable-ambisonics", I get this error message:
configure: WARNING: unrecognized options: --enable-ambisonics
Thanks for your help.
Marc
Le 19-12-18 à 11 h 52, Andrew
2016 Apr 19
2
Channel Mapping Family for Ambisonics
On 19/04/16 12:17 PM, Timothy B. Terriberry wrote:
> We should probably start keeping track of the space of invalid TOC
> sequences somewhere global so that people don't define conflicting
> extensions.
I started such a page at https://wiki.xiph.org/OpusExtensions
-r
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2019 Dec 18
2
opusenc for ambisonics?
I compiled the latest (git master) of opus, libopusenc, opusfile and
opus-tools:
$ opusenc --version
opusenc opus-tools 0.2-8-g4976421 (using libopus 1.3.1-4-gad8fe90d)
I tried to encode a 3rd order Ambisonics wav file with the standard
Ambix (ACN-SN3D) format; opusinfo is reporting :
Streams: 16, Coupled: 0
Channel Mapping Family: 255 Map: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14,
2008 Oct 28
3
Vorbis, ambisonics and 'Vorbis Tools'
All,
Progress has been made on the proposed draft spec for integrating
ambisonics into vorbis. We are not yet finished (should be soon), but
you can see the progress here:
http://docs.google.com/Doc?id=df4dtw69_3626qqq6st
The issue we have hit now concerns how/who would implement the
encoding and decoding in Vorbis Tools. Because ambisonics uses
spherical harmonic components, an ambisonic file
2019 Dec 19
1
opusenc for ambisonics?
Unfortunately, ambisonics aren't exposed in opusenc yet, thus the trouble.
They're an API-only feature, but it's a good time to discuss what such a
command-line interface would look like, notably: how to specify multiple
streams & stream order, select the mapping family, coupled channels, and
how to specify the matrix (for family 3). Likewise, there's no multistream
support at