Displaying 20 results from an estimated 5000 matches similar to: "Using large-scale repetition in audio compression"
2003 Jan 11
3
Multithreading
Hi.
I need to execute a function from within a GUI.
This seems to be no problem but this function takes about 4 minutes to
finish, which means the application doesn't react at all, while the
function is running.
Can I execute a function as a separate Thread, while keeping
control(e.g. a reference) of it at the same time?
If not, how do this with a class containing this function?
thanks,
2004 May 06
2
AW: AW: Reading OGG embedded in a pack file
yes, you are right. i always search for quick and easy solution and
forget in the meantime that vorbis is a low level codec library. so
probably a wrapper lib is the right way. but as far as i understand
vorbisfile is already a bunch of convenience functions? so to speak a
wrapper lib ? so why not enhance a little bit vorbisfile ?
and - i did not felt personally attacked. i just wanted to note
2004 Aug 02
9
various patches from Mandrakelinux package
I was looking at the libvorbis 1.0 SRPM of Mandrakelinux, and it contained
some patches which are not included in vorbis 1.1 svn. I'm attaching these
patches here, because it could maybe be interesting to include these
upstream.
(libvorbis-1.1-aliasing.patch is actually a rediffed patch of Mandrakesoft's
one for 1.0 against 1.1 svn).
The author of these patches is Gwenole Beachesne,
2001 Feb 10
2
A different take at video encoding - I'm stuck though
As I said in the other thread (for people using threaded mail)/in my
last mail (for the rest), I'm working on the "split up the frames into
textured triangles and output textures and coordinates" idea. The idea
is to find edges in the image. So far I have a Sobel edge detector, a
wavelet transformer (to compress the textures, still very incomplete,
transform only), and some
2001 Jan 10
3
Video compression, edge detection, and gcc warnings
<WARNING: Long message ahead>
Well, I have actually done something the past 1 1/2 week. I've created a
program that runs several filters over an image to extract edge
information. Currently it loads any uncompressed grayscale TGA file, and
spits out another uncompressed greyscale TGA file that is 255 at places
where there are edges, and 0 where there are not. I managed to get out
quite
2001 Jan 02
3
now i'm a real vorbis guy.
unemployed like you ex-icast folks :)
(half the company was axed)
Erik.
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2003 Jun 11
1
Problems with ov_open continued
I've downloaded the latest versions of the libraries available from the
website, http://www.vorbis.com/download_unix.psp, and compiled them, but
it hasn't made any difference to the situation.
I downloaded the .tar.gz "for everyone" versions, not the rpm developer
versions. Will this make any difference?
Cheers,
Oliver Sneyd
<p>--- >8 ----
List archives:
2000 Dec 19
1
Tarkin video codec?
Me again, this time not about patents but about wavelets. I've been
doing some work on an image compression method which uses Haar wavelets
plus VQ and entropy coding, and Segher Boessenkool told me in a private
message that you are also doing a video codec. So I searched the
archives and read a bunch of posts, but I never did find out any web
address. And it's not on xiph.org either. So
2004 Feb 18
5
compiling vorbis in cygwin
Hi,
On compiling vorbis in a cygwin shell using "./autogen.sh" I get the
following error...
configure:19396: checking for Ogg
configure:19431: gcc -o conftest.exe -O20 -D__NO_MATH_INLINES -fsigned-char
-DUSE_MEMORY_H conftest.c -lm -logg >&5
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/ld:
cannot find -logg
collect2: ld returned 1 exit status
The
2003 Jun 18
2
ogg multithread encoding
Hello!
I'm working on a program which purpose is to compress a single wav file using many processes. I know that my solution may not look excellent but in my opinion it's simple to implement it in a program.
What I've managed to do is:
-split single wav file into many parts (with appropriate headers),
-create process for each part,
-each process executes 'oggenc' program.
It
2003 Sep 10
1
A new introduction attempt.
I have been using libvorbis for the past few weeks and have been asked to
summarise what I have discovered about the codec. There is an early draft
of the document at
http://www.geocities.com/gatewaystation/vorbis/vorbis.htm - Please forgive
the dodgy formatting (it was formerly a MS word document that got converted
with their 'save as html' feature). I still have some additions to
2001 Jan 06
2
video compression using textured polygons?
I was just thinking last night, how about this:
For each frame, detect edges and divide the frame into a
bunch of non-overlapping polygons. Extract textures from
the first frame, then save changes in polygon vertex
coordinates only, unless the textures change too much in
which case new textures (which could be wavelet compressed)
would be stored.
Also, if the movements of the vertices would
2000 Dec 15
6
patents and separate entropy coding
Hi everyone,
first of all, I searched through the archives for any posts resembling
this, I didn't read all posts about the patents so if this has been
suggested before I apologise.
I read in an article on C|Net (I think, it was linked from Slashdot
anyway) that Thompson are threatening to sue you if Ogg Vorbis becomes a
success. Which is evil, and I'm also mad at them because they never
2003 Jun 17
1
For Oggvorbis algorithm description.
Dear Sir,
I am a DSP Engineer working in the field of Audio Standards
and general Signal Processing Algorithms. I am very much interested in
knowing the algorithms which make OggVorbis a reality. Kindly send me
the link which will lead me to the algorithm description or pseudo-code.
Thanking You,
Sincerely,
Tom Xavier.
<p>--- >8 ----
List archives:
2003 Aug 31
1
broken link in documentation
hello,
i'm reading the doc at http://xiph.org/ogg/vorbis/doc/Vorbis_I_spec.html
and the link to the paper
http://www.iocon.com/resource/docs/ps/eusipco_corrected.ps
doesn't work.
Could anyone correct the link and/or mirror this paper ?
Thanks,
YG
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2004 Jan 28
3
hi
The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.
<p>
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2004 Feb 05
1
Psychoacoustic model
We've implemented a vorbis decoder based on Tremor and as part of the
documentation we're also writing about psycho acoustic models and
encoding.
We're quite up to date with the decoding process and psycho acoustics
in general but unfortunately not on the psycho acoustic encoding used
in Vorbis.
We have a few questions that would we would be very thankful to have
answer to:
Which
2003 Nov 08
1
Compiling problems libvorbis 2.0
Hi Guys,
I want to compile libvorbis, but I get this error message if I made a make.
I use Sun Solaris 9 on a UltraSPARC Server and gcc 3.3
can anyone help me, please?
<p>Best Thanks
Daniel
Here the message output from compiling.
-----------------------------------------
/usr/ccs/bin/ld -G -z defs -h libvorbis.so.0 -o .libs/libvorbis.so.0.3.0
mdct.lo smallft.lo block.lo envelope.lo
2003 Dec 08
2
Encoding, documentation, questions
As part of the documentation of a Vorbis decoding project, a quick
explanation of the encoding procedure is required. I quite up to date
with the decoding process but not with the encoding part.
Is there any documentation explaining the different steps during
encoding?
What I'm looking for is a list of encoding steps, very briefly
explained and more details on a few fundamental steps, like
2003 Nov 08
2
Encoding in Delphi - Help
Hi!
I've made a vorbis encoder in delphi, but it's very verey slow!
It takes 5 minutes to encode a pcm file.
And i don't know why. Could anyone help me???
----------------------------------------------------------------------------------
result := ogg_stream_flush(os, og);
while result <> 0 do
begin
OutFile.Write(Pointer(og.header)^, og.header_len);