Displaying 20 results from an estimated 900 matches similar to: "Optimizing Vorbis for a DSP"
2004 Mar 21
1
audio compression on a DSP Texas
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2002 Jul 11
1
RC4/1.0 and peeling
first, congrats to monty and the whole crew for getting
this close to 1.0. it's a monumental achievement reflecting
a huge amount of hard work -- kudos!
econd, i know the bitrate peeling feature has been pushed
back until after 1.0 is out. but i'm wondering -- will oggs
created with a 1.0 encoder be peelable with an as-yet-unreleased
utility, or do "peelable oggs" have to be
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
2004 Aug 06
2
fixed point speex on a texas dsp + real time acquizition
hello,
My project is to implemente an audio compression algorhitm on a DSP
TMS320DM642.
I think that SPEEX can be a good choice because fixed-point have been
developed. I would want to know how I can choose the fixed point in the
program
I want to know if it is possible to do a real time acquizition and to
compresse in real time the audio input signal. By example, I have on my
demonstration card
2004 Mar 11
2
Ogg/Vorbisreport, FFT optimizations
I wrote to the list earlier about optimizations of the
tremor. Specially replacing the IMDCT with a N/4 FFT.
The report is available here: http://www.sandvall.nu/thesis.pdf
Short summary:
Optimization of the Tremor code under 50kB for a "split" decoder version.
~44 MIPS. Huffman highly unoptimized. IMDCT ~ 8 MIPS.
Quick overview of the
2005 Mar 22
1
Re: Speex on a T.I. TMS320C5510 DSP
Hi Frank,
Actually, I just merged (in SVN) a patch doing exactly that. AFAIK it
allows Speex to run on a C55x. I think it should work for you with the
following caveats:
1) The static codebooks still take up 16 bits for every 8-bit value
(that's only a code size issue)
2) The bit-packer always returns a multiple of 16 bits instead of 8 bits
(but it uses all bits when packing).
Jean-Marc
2005 Aug 09
3
FLAC to Vorbis
Hello everyone,
I am running Ubuntu and have converted my CDs to FLACs (using all the
paranoia and fixing all the tags etc.). What is the best way for me to
convert all of those FLAC to ogg-Vorbis files, keeping all the tag
information and the same directory structure?
I am not wanting anything incredibly advanced, but was expecting
something like
vorbconvert /media/cd_rom/ /home/aaron/vorbis/
2005 Aug 09
3
FLAC to Vorbis
Hello everyone,
I am running Ubuntu and have converted my CDs to FLACs (using all the
paranoia and fixing all the tags etc.). What is the best way for me to
convert all of those FLAC to ogg-Vorbis files, keeping all the tag
information and the same directory structure?
I am not wanting anything incredibly advanced, but was expecting
something like
vorbconvert /media/cd_rom/ /home/aaron/vorbis/
2003 Oct 24
1
Test .ogg files
Is there a archive with a collection of different .ogg files encoded
with different settings that can be used to verify compatibility?
* Different window size (e.g. != 256,2048)
* Much larger codebooks and other extreme cases that are not generated
using a standard encoder.
* floor0
Regards
--
/ Johannes Sandvall
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Ogg project
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
2004 Aug 06
1
fixed point speex on a texas dsp + real timeacquizition
"Do you mean doing that on a DSP, or on a PC (before you do it on DSP)?"
Yes I want do that with a PC in order to test if I can encode in real time an external audio source and then I want to
implemente SPEEX in a dSP.
guillaume
Jean-Marc Valin a écrit :
> > I want to know if it is possible to do a real time acquizition and to
> > compresse in real time the audio input
2000 Oct 23
4
More mdct questions
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
2003 Jan 09
1
encoding to fixed window length vorbis file
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Hi!
I want to encode wav file into fixed window length vorbis file. I don't
know if "window" is good name for that, but i mean MDCT buffer size.
This buffer is passed to mdct_backward() as "in" and it's size is
determined by "init->n" variable which is also passed to this function.
So, when I say "window
2004 Mar 19
9
How many MIPS for Vorbis Decoder?
Hello,
I may be stupid, but I cannot find any data on how "expensive" the Vorbis
Decoder is. Looking for an embedded solution I am interested in how many
"MIPS" you need to decode a MONO audio stream at reasonable quality (44 kHz,
approx. 100 kbps?)
Can it be done in a microcontroller, or do I need ultra-expensive DSPs to do
it?
Thanks for hints
Jens
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List
2002 Aug 13
1
mdct.c pointer to array conversion
Hi all,
I'm attempting to convert all the pointers to arrays the mdct_backward
function so it can be partitioned off for a hardware implementation.
Although this code is quite short I'm finding it a little tricky.
As it stands, mdct_backward is passed values by reference i.e.
void mdct_backward(mdct_lookup *init, DATA_TYPE *in, DATA_TYPE *out)
o my modified version starts
void
2003 May 20
2
mdct_backward with fused muladd?
Can anybody point me at any resources that would explain how to optimize
mdct_backward for a cpu with a fused multiply-accumute unit?
>From what I understand from responses to my older postings, Tremor's
mdct_backward could be rewritten to take advantage of a muladd.
My target machine can do either two-wide 32x32 + Accum(64) -> Accum(64)
integer muladd or eight-wide 16x16 + Accum(32)
2004 Mar 24
2
fixed-point OGG Vorbis encoder
Hello,
Iam interesting in transcoding the algorithm of OGG VORBIs in fixed
point because I have to implemente this encoder in a fixed point DSP.
Does the source code of ogg vorbis encoder exist in fixed point or is
there people that work on this or anything else?
Guillaume
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2024 Feb 21
1
Cant access home folder after 4.13.x
On Wed, 21 Feb 2024 21:19:23 +0000
evil cRaftKnife via samba <samba at lists.samba.org> wrote:
> I do have 'local' users in OpenLDAP.
>
But how is Samba supposed to know this ?
Are you also running a dns server ?
I ask this because a Samba AD DC runs kerberos, ldap and a dns server
and is a lot easier to set up than your existing setup, I would also
recommend you use a
2024 Feb 21
1
Cant access home folder after 4.13.x
The users in LDAP appear as local users on my file server using the
/etc/nsswitch.conf
passwd: files ldap
group: files ldap
[root at fs ~]# getent passwd | grep kev
kev:x:10000:10001:Kev:/home/fukr/kev:/bin/bash
[root at fs ~]# getent group | grep kev
net-users::10001:kev
net-admins::10000:kev
media::10002:kev
Kerberos is working fine, so is NTP and DNS.
My problem is that my issue
2013 Aug 16
2
share permissions
I have a share setup on a Samba 4.0.8 / CentOS 6.4 box that is
successfully replicating with a W2K3 server. I'm following the HOWTO
here: https://wiki.samba.org/index.php/Setup_and_configure_file_shares
[mytest]
path = /home/me/mytestshare <-- with or without trailing slash
read only = No
On the W2K3 box, I can browse to \\newdc and I see my test share listed
there. I can also see