Displaying 20 results from an estimated 900 matches similar to: "Questions about window sizes"
2003 Mar 12
2
encoder block diagram
I've made a block diagram of the encoder because I tried to find out, how it works
http://stoffke.freeshell.65535.net/ogg/block.html
Although there are specifiation docs, that give very
detailed information about single aspects of the encoding (or decoding) ,
I'm missing documenations that give a more general overview,
about how the encoder works.
(Vorbis Illuminated seems a bit
1995 Nov 14
1
Vorbis Codebooks
Hello,
Vorbis uses codebooks, for example to do vectorquantization and huffman-encoding.
My question is - are all these codebook dynamicly generated ("trained")
or are there also static codebooks used ?
If yes, what specific tasks are these 2 types used for, during encoding ?
Thanks
Stoffke
<p>--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project
2003 Jan 24
8
just an idea about quality evaluation
Hello
I had an idea about judging the quality of ogg vorbis
(or any other lossy codec)
I took a wave-file and encoded it to ogg.
Then decoded ogg to wav and inverted it's phase. When mixing the original
wav with the phase-inverted decoded ogg-file, any identic parts of compressed and uncompressed audio should be eliminated.
Of course there's always a "rest" of sound because
2015 Mar 04
2
adaptive bandwidth
Thanks Dragos,
I assume I will be setting those parameters during initialization of
encoder right?
Question is, if connection gets too lossy, how will opus adapt to it? Can
it automatically shift bitrate down to minimize impact?
Mark from IRC suggests that the app has to be aware of the losses and
change it on the fly.
Has anybody on the list tried this?
Kelvin Chua
On Wed, Mar 4, 2015 at 5:53
2015 Feb 24
2
Questions regarding OPUS_APPLICATION_AUDIO vs OPUS_BANDWIDTH_NARROWBAND
I have an audio device whose 'driver' gives me Opus encoded frames using
OPUS_APPLICATION_AUDIO and max bandwidth set to OPUS_BANDWIDTH_NARROWBAND.
How does Opus encoder decide the center point of the 4K bandpass filter?
Is it done frame by frame?
--
Tony
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2010 Aug 15
2
band pass filter
Hello list,
Is there any way to bandpass filter in R
thanks
nuncio
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Nuncio.M
Research Scientist
National Center for Antarctic and Ocean research
Head land Sada
Vasco da Gamma
Goa-403804
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2001 Feb 13
1
bandpass filters in R
Hi,
does anybody have any ideas regarding the easiest and most efficient way
of implementing a bandpass filter in R ?
any help would be truly appreciated.
cheers,
Pat Johnston
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Send "info", "help", or
2003 May 22
2
square polar mapping - backgrounds
Hello,
I wanted to find out more about square polar mapping, cause that whole
stuff is a bit tricky - to me - and not so easy to understand.
Searching the web did't get me any results, so I wonder what the background
of square polar mapping is.
Is it derived from some mathematical publications or just the result of a brilliant
intuition of a Vorbis programmer ? ;)
Thanks.
Stoffke
2004 Oct 07
2
Dialplan to Pick up calls that are ringing onother extensions?
Well I dont want it to operate as a group. I understand that it is *8 on most PBX systems but I would like it to work as dialing *8+extension-thats-ringing to have it go over to my extension. I am having a lot of trouble finding more information from the wiki and google.
Thanks!
-James
-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
2002 Nov 26
1
floor curve question (whitening filter)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HEAD><META http-equiv=Content-Type content="text/html; charset=iso-8859-1"></HEAD>
<BODY bgColor=#ffffff><FONT face="verdana,arial" size="2">
Hi there,</P>
one step in the encoding process (if I got it right), would becomputing a "floor
2005 Aug 18
1
Two internet lines and squid problem.
I have 2 internet connections and i;m trying to use squid as transparent proxy
but every time squid is using first internet line but i want to use
second internet line .
i have this settings and without squid it''s working
i have default route on the first internet connection.
iptables -t nat -I POSTROUTING -o eth2 -p tcp --dport 80 -s
192.168.0.0/24 -d ! 192.168.0.0/16 -j SNAT --to
2015 Mar 04
2
adaptive bandwidth
I am using libopus for my implementation. I wonder if anybody in the list
have any experience on how to make libopus dynamically adjust its bitrate?
On Mar 3, 2015 10:42 PM, "Benjamin Schwartz" <benjamin.m.schwartz at gmail.com>
wrote:
> It sounds like your software isn't adjusting the opus bitrate in response
> to network conditions. For example, many WebRTC
2015 Mar 04
0
adaptive bandwidth
Hi Kelvin,
The audio bandpass setting is only configurable when the encoder is instantiated (eg: start of a Voip call ) , but you can change the bitrate anytime.For example if you can read incoming RTCP packets , you can check if there's reported packet loss , and then lower the bitrate accordingly.Yes, the app has to be aware of the packetloss ?percentage.
Cheers,Dragos
From: Kelvin
2005 Aug 29
1
Previewing oggvorbis files in GNOME...
Hi. I'm wondering if anyone out there can give me a little help trying
to figure something out: I presently am running CentOS4.1 with GNOME as
my desktop (It runs quite well, I must say!). I just have a little
curiosity: I have a few audio files (.wav, .mp3 and .ogg) and I like to
"preview" them. When run my mouse over the .wav files (and mp3 files)
the
2005 Oct 19
2
Filter design in R?
Dr. Williams,
I ran across your inquiry on one of the R-help mailing lists regarding
digital filter design and implementation. I found no response to your
email in the archives and was wondering if you were able to find anything.
Thanks,
Israel
--
Israel Christie, Ph.D.
Email: ichristie at gmail.com
Phone: 865.766.0214
Mobile: 865.406.4615
2015 Mar 04
0
adaptive bandwidth
Hi Kelvin,
You can use something like :opus_encoder_ctl(enc,OPUS_SET_BITRATE(bitrate));opus_encoder_ctl(enc,OPUS_SET_MAX_BANDWIDTH(bandpass));
bandpass is the audio bandpass?, eg: OPUS_BANDWIDTH_WIDEBAND .
You will need to calculate the codec bitrate from the available network bitrate (by taking into account the size of the IP+UDP+RTP headers which is 40 bytes ) .
By default the audio bandwidth
2011 Sep 13
1
sox: Failed reading obd-demo.mp3: Do not understand format type: mp3
Hi,
Can someone please comment about the below issue
[root at host0040 kaushal]# file obd-demo.mp3
obd-demo.mp3: MPEG ADTS, layer III, v1, 256 kBits, 44.1 kHz, Monaural
[root at host0040 kaushal]# sox obd-demo.mp3 -e stat
sox: Failed reading obd-demo.mp3: Do not understand format type: mp3
[root at host0040 kaushal]# sox -V obd-demo.mp3 -r 8000 -c 1 -t ul -w vm-intro.ulaw
sox: Failed reading
2003 Mar 14
0
encoder block diagram
I've made block diagram of the encoder because I tried to find out, how it works
http://stoffke.freeshell.65535.net/ogg/block.html
Although there are specifiation docs, that give very
detailed information about single aspects of the encoding (or decoding) ,
I'm missing documenations that give a more general overview,
about how the encoder works.
(Vorbis Illuminated seems a bit outdated,
2002 Oct 22
3
Spectral phase information in residue vectors
I found this sentence in the Ogg format specs:
http://www.xiph.org/ogg/vorbis/doc/vorbis-spec-res.html
"A residue vector may represent spectral lines, spectral magnitude, spectral phase or hybrids as mixed by channel coupling."
But where does the spectral phase information come from ?
AFAIK MDCT doesn't provide any phase information.
And in OGG-encoding, MDCT is taking place a few
2020 Jun 11
1
OPUS encoded data size and bandwidth of encoder
Hey, I am having trouble with the size of the encoded bytes by Opus. I am
also having issue with the Bandwidth ctl.
Here is the scenario.
If I encode 16khz sampled audio:
opus_encoder_ctl(enc,OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_WIDEBAND))
opus_encoder_ctl(enc, OPUS_GET_BANDWIDTH(&x)) = 1102
opus_encoder_ctl(enc, OPUS_GET_MAX_BANDWIDTH(&x)) = 1103
average encoded size = 120 bytes
if I