Displaying 20 results from an estimated 9000 matches similar to: "vorbis compatibility"
2000 Dec 30
5
2d wavelet transforms
I've been reading up on wavelet transforms the past week,
and I plan to start on some video compression stuff next
week, if it's any good (small chance :)) for Tarkin.
So far I think I know what's happening, however there's one
small thing I don't quite understand yet. If I understand
correctly, you can do a 2d wavelet transform (I'm assuming
a Haar transform here for
2000 Dec 16
0
joint multichannel coding (long message)
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
2000 Dec 14
3
pho: [Fwd: new MS codecs]
> 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
2010 Sep 28
1
Best package for time series analysis with wavelets???
Hi!!
I'm looking for a package in R for time series analysis using wavelets( I'm
interested on extractingt information from electrocardiograms with the aim
of study the heart rate variability) so i want to know which package is the
best for me. I've thinking about using some of those(you can recommend me
others,xD):
*wavelets: A package of funtions for computing wavelet filters,
2000 Jun 19
1
More Ogg Vorbis press
(it's in French, but Babelfish does a surprisingly good job on it):
http://www.transfert.net/fr/techno/article.cfm?idx_rub=89&idx_art=1016
Monty
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2001 Jun 28
2
plan/date for new features
Greetings,
With all the press concerning the 'almost 1.0' release of vorbis; I see a
lot of messages floating around as 'now 1.0, and -soon- it will include
joint-stereo, Wavelets, low-bitrate, peeling, etc. etc.'
Before I start 'advocating' vorbis and tell everybody what it all can do;
is there actually a date or some other planning when all those
2002 Oct 27
1
denoising univariate data with wavelets
Hi,
I am interested in a applying wavelets as a smoothing tool for my
(1-dimensional) data. I looked into wavetresh and waveslim packages but
could not quite figure out an obvious way to do this after running dwt or
wt functions. Would someone be able to point me in the right direction on
how to denoise univariate data using one of wavelet packages available in
R?
Thank you very much
Jane
ps
2003 Feb 25
1
Wavelets correlation test
Hello,
I use wavethresh packages to perform wavelet analysis.
In particular, I would like to compare 2 signals (vectors) after a wavelet
decomposition. I would like to use cor.test function, but this function acts
on the entire vector values.
I plan to perform a cor.test on each level of the wavelet decomposition, say
N. So I will have at the end of a first step N results of cor.test.
How can
2006 Jan 08
2
Filters in waveslim
Dear R Users,
For running wavelet functions using dwt( ), modwt( ), and mra( ), a wavelet filter algorithm is applied. For all these functions, default is "la8" and other possibility is "haar". In related documents, another possibilities like as symlet and coiflet ... are not cited.
Besides "la8" and "haar", which wavelet filters can be used?
Thank
2009 Jun 04
1
Morlet wavelet analysis
Dear,
I am using "cwt "function from Rwave package to perform Morlet wavelet analysis.
d1<-c(1.31673209591515, -0.171333455797346, -1.67618546079420,
-0.931604651010362, -0.954614183224057, -1.19821794547758, 0.516096363353144,
-0.0432811977638559, 0.737764943619919, 0.438046629673177, -0.208607167908743,
-0.3091308821262, -1.42473112931594, 0.234125312118165, -0.307047554490597,
2000 Dec 08
2
R and wavelets
Does anyone know of any use of wavelets (particularly for density
estimation) in R? Are there any wavelet packages?
-Alex Morgan
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2006 May 25
3
Wavelet Functions
Does R have any wavelet functions? When I type
> help.search("wavelet")
I get
" No help files found with alias or concept or title
matching 'wavelet' using fuzzy matching."
Thanks,
Peter.
2012 Mar 14
1
Wavelet Image Codec - advice
Hello,
Is is a great pleasure to post on a Xiph IRC Channel.I contacted you to
have your advice and comment about wavelets for image/video compression, as
I have made a wavelet-based image compression codec.
I know that currently the best image/video compression codecs use the DCT
block-based transform, like JPEG, Ogg Theora and the recent Google WebP,
for example, but what would you think of
1999 Aug 24
1
Re: Tr: patent free format
> > So
> > it's closer to Dolby AC-X than to VQ. Unfortunately, I'm not sure that
it's
> > not patended by Dolby.
>
> Could you be more specific? More than anything else, we need to know more
> about the patent waters we're navigating.
>
> Monty
As Dolby AC-X is using enveloppe of the sound since several years, and as it
seems that Dolby was
2009 Oct 16
2
what's the R code for wavelet decomposition (Haar transformation)?
Dear all,
Using R function "dwt", it seems that I cannot specify the wavelet
transformation like Haar. What's the R code for wavelet decomposition
which allows me to specify Haar wavelet transformation? Of course, if it
can include "db2", that is even better. In general, I want an R function
like matlab code "dwt". Thanks in advance!
Zhen Li
2007 Feb 01
1
Wavlet filter using morlet mother wavelet
Hi, List ,I am searching any package on R which can do wavelet filtering for mother wavelet morlet ,is anybody having any script for the same ? I am new to the RwAVELET ANALSSIS.. THANKS IN ADVANCE ANIL KUMAR ANIL KUMAR( METEOROLOGIST) LRF SECTION NATIONAL CLIMATE CENTER ADGM(RESEARCH) INDIA METEOROLOGICAL DEPARTMENT
2001 Jun 27
1
Wavelet audio codec by Adapted Wave Tech.
Following a post on vqf.com forum, I found out that some company called
Adapted Wave Technology is ready to release its audio codec based on
wavelets. They say that this wavelet-based codec is superior to MDCT codecs
by 30-50%.
One sentence caught my attention: "Adapted Wave Technologies holds exclusive
patent rights for applying wavelet packets to audio applications." - sounds
like a
2010 Nov 25
2
Lifting Wavelet Transform
Hi R users
Thanks in advance
Is lifting wavelet transform implemented in R? If so, which package or codes can be used for performing that?
assaedi76@yahoo.com
Thanks
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2010 Aug 31
1
wavelet parameters with sowas
Hello everybody.
My name is Angela.
I'm doing wavelet using the sowas library. The problem I have is that I
don't know how to choose the paremeters to describes differnt wavelet
analysis. How I select the noctave, nvoice, w0, s0,...?
I hope my question is clear enough.
Thank you very much beforehand.
Angela
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2005 Nov 29
1
wavelet transform
Hello,
I am thinking about plugging in Discrete Wavelet Transform as
described in Vorbis I spec:
1.1.2. Classification
Vorbis I is a forward-adaptive monolithic transform CODEC based on the
Modified Discrete Cosine Transform. The codec is structured to allow
addition of a hybrid wavelet filterbank in Vorbis II to offer better
transient response and reproduction using a transform better suited to