Displaying 20 results from an estimated 9000 matches similar to: "Same bitrates on narrowband for quality 3/4, 5/6, 7/8?"
2008 Sep 15
2
Bitrate Question
Hello developers,
I have a question about supported bitrates for SPEEX. Regardless of whether I specify a 10kbps or a 8kbps bitrate, the encoded .spx file is the same size and have the same PESQ value. This makes me wonder if SPEEX supports arbitrary bitrates, or only a certain set.
A few more details about my configuration:
I am using SPEEX encoder version 1.1.12
I am encoding a narrowband
2004 Aug 06
2
narrowband embedded in wideband
Is there any way to access only the narrowband portion of a wideband
stream?
I'd like to be able to encode the audio only once, but allow members
in a conference to have some rough selection of bandwidth, and allow
them to move to a lower-bitrate stream if there is a need to do so.
Thanks,
Matthias
--
Matthias Granberry
matthias@utdallas.edu
(469) 371-0596
--- >8 ----
List archives:
2004 Aug 06
1
narrowband embedded in wideband
It looks like I'll need to go further into the guts of speex to do
this. I do, however, see some lines in nb_celp.c/nb_decode() that
look interesting. I guess I'll play with it. I doubt that it will be
terribly clean, though.
Jean-Marc: Take a look at line 1195 in nb_celp.c (CVS). It reads
"speex_warning ("More than to wideband layers found: corrupted
2011 May 04
2
speexenc/speexdec doubles file size
this is not really a development question, but i didn't find another
mailing list to ask it.
any idea why size of wav file doubles when it is encoded to speex and
back to wav:
$ ls -ls testi.wav
40 -rw-r--r-- 1 foo foo 40674 May 4 14:38 testi.wav
$ speexenc --denoise --agc --quality 10 testi.wav testi.spx
Encoding 8000 Hz audio using narrowband mode (mono)
$ ls -ls testi.spx
20
2005 Oct 25
2
Noisy sound quality with Blackfin in WB-mode
Hello all,
I'm testing the Speex codec for my diploma thesis on a BF-533 Blackfin under
uCLinux (2005R3 RC3 release). I successfully compiled the Speex (1.1.11-svn)
and I can encode/decode wav-files on my STAMP-board using the speexenc/speexdec
sample apps. But I encountered that the decoded file sounds strange/noisy, when
compiling with "--enable-blackfin-asm" +
2004 Aug 06
2
Speex 1.1.2 - Try it on ARM
Hi,
I just released unstable version 1.1.2 that contains more fixed-point
work. Though it's still not 100% complete, enough have been done to make
it run in real-time on ARM. In order to do that, compile with
--enable-fixed-point --enable-arm-asm. All narrowband modes work in
real-time with complexity 1 (some work with higher complexity) and some
wideband modes also work (up to ~20 kbps) at
2012 Aug 01
2
Higher quality narrowband streaming options
Hi,
Up until now, I've been providing narrowband streams at 24kbps MP3. We've
reluctantly been using MP3 instead of say Ogg Vorbis due to wider
support.
But it's getting to the point where low bitrate MP3 doesn't really cut it
anymore. With technologies like AACPlus out there in common usage, people
have come to expect better and one can hardly blame them.
So I thought
2004 Aug 06
3
size speex file encoded
Hi,
I am working with libspeex api. I would like compare the size of speex file
encoded with libspeex and the size of speex file encoded with speexenc.
For example, I encode with speexenc (narrowband, quality 1) a wav file of
1.43 MB (17 seconds) output a spx file weight 21KB, for other hand I encode
with libspeex the same wav file with same characteristics in arm processor,
pocket pc and the
2009 May 30
0
something wrong with narrowband and ultra-wideband?
I downloaded speex-1.2beta3-win32 binaries, and used the speexenc.exe and speexdec to process the file male.wav download from http://speex.org/samples
I used both the narrowband and ultra-wideband mode:
>speexenc -n --quality 3 male.wav n3.spx
Encoding 8000 Hz audio using narrowband mode (mono)
>speexdec n3.spx n3.wav
Decoding 8000 Hz audio using narrowband mode (mono)
Encoded with Speex
2009 Mar 17
2
Resample UltraWideBand to NarrowBand
Hi List,
Now I will send to you more specific what I am trying to do.
I have one Asterisk Channel where receives Midia Frames in the codecs
format: Speex UltraWideBand and Speex NarrowBand.
When I use Speex NarrowBand the Asterisk is able to convert this frame to
G711.
But when I use Speex UltraWideBand the Asterisk don't convert it.
Then I need in my Asterisk Channel Source include the Speex
2005 Apr 20
2
Speex-1.1.7 seems to crash with --enable-sse (on P3/GCC-3.2)..
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
<b></b>Hi,<br>
<br>
I also tried to build speex
2007 Aug 06
2
11kbps narrowband on a 24bit DSP
Hi,
I am using speex 1.2beta2 on a 24bit DSP that has a severe program and
data space limitations. I am only interested in the speex decoder for
11kbps narrowband implementation.
I am using the following parameters and structures
160, /*frameSize*/
40, /*subframeSize*/
10, /*lpcSize*/
17, /*pitchStart*/
144, /*pitchEnd*/
/* 11 kbps medium bit-rate
2004 Aug 06
0
Table of bitrates
Hi there.
I noticed that the speex.org website does not appear to give
a table of what bitrates you can expect when using the SPEEX
codec in CBR (quality) mode.
I have created a table for all modes, giving the bitrate for
two cases.
a) all coded frames saved consecutively in bitstream
b) all coded frames saved with byte alignment
You can see there is significant padding loss at some (lower)
2007 Mar 29
1
Mips count for a narrowband decoder
Hi,
What is the MIPS count for the narrowband decoder for 24.6 kbps
mode??? Also what is the expected MIPS count on say C55x
after optimization??
Thanks in advance
Regards,
Naveen.
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2004 Aug 06
4
Chopping off the wideband?
On Tue, Feb 18, 2003 at 09:06:16PM -0500, Jean-Marc Valin wrote:
> BTW, when you have something working and stable, I could include it in
> the main Speex distribution.
Hmmm, define working and stable :)
<braindump topic="speexcat">
It began as a merge between speexdec and speexenc from 1.0beta3,
with the encoding/decoding removed, and simply piped in and out from
ogg
2004 Aug 06
3
Higher Bandwidth at lower quality settings
Hi,
I was wondering if anyone has experimented with Speex's wideband (16kHz)
mode at lower quality settings. In particular I have been using quality 3,
and with wideband input files the resultant frequency spectrum is limited to
about an upper end around 3.5kHz (almost telephony quality bandwidth). Has
anyone tried increasing the spectral bandwidth at the expense of lowering
the
2015 Feb 05
2
VOIP: FEC and NARROWBAND
Hello,
Is FEC supposed to work in NARROWBAND mode ?(with maxaveragebitrate=12000; maxplaybackrate=8000 ) ?I am having some confusing results, it appears that FEC is enabled in the encoder, but the decoder cannot find any packet with FEC.
I am also wondering if this piece of code is correct (webrtc):
/* The following is to parse the LBRR flags. */? if (opus_packet_parse(payload,
2005 Mar 08
1
Speex-1.1.7 seems to crash with --enable-sse (on P3/GCC-3.2)..
I tried building speex with SSE, and found that it crashes for me here:
[This is on RH=8.0]:
# libtool gdb ./src/speexenc
GNU gdb Red Hat Linux (5.2.1-4)
[...]
This GDB was configured as "i386-redhat-linux"...
(gdb) r --rate 8000 --16bit -n /dev/zero /tmp/foo
Starting program: /usr/src/speex-1.1.7/src/.libs/lt-speexenc --rate 8000
--16bit -n /dev/zero /tmp/foo
Encoding 8000 Hz audio
2004 Aug 06
1
Higher Bandwidth at lower quality settings
Hi Jean-Marc,
I thought at quality 3 (wideband) - wb_submode1 that the 4-8k band was not
using a codebook table. From the code I can see that some sort of "lsp"
encoding is performed. What exactly does this encode? (I assume lsp means
line-spectral pairs)
The reason I am asking is I'm comparing the "effective" spectral bandwidth
of Speex against the
2005 Oct 04
1
Strange Problem
Hi
I am facing a strange problem. I have integrated speex
codec's narrowband mode in my SIP based server. Then I
tried to integrate the wideband mode. But the program
crashes mysteriously. My encode and decode codes for
wide band mode are exact similiar to that of
narrowband, except the mode initialization, where I
put "speex_wb_mode" instead of "speex_nb_mode".
My