Displaying 20 results from an estimated 100 matches similar to: "LIB usage"
2005 Jun 06
1
SpeexBits Questions
The example in the documentation demonstrates using speex_bits_reset
before encoding and decoding each frame.
"
speex_bits_reset(&bits);
speex_encode(enc_state, input_frame, &bits);
nbBytes = speex_bits_write(&bits, byte_ptr, MAX_NB_BYTES);
"
What happens if this is not done? I think I'm missing the point of
having a SpeexBits object.
2005 Jun 06
1
SpeexBits Questions
Thanks, it makes more sense to me now. Does speex_bit_read_from also
append in that manner?
Jean-Marc Valin wrote:
> speex_bits_reset is before encoding, not decoding. If you don't call it,
> then everything you encode will be appended so it will grow without end.
> As for the point of the SpeexBits struct, it's there as a sort of "array
> of bits" to it's easy
2007 Sep 19
1
Speex Questions <./Configure %install make [-enable-fixed-point] setting> and Encoding Times etc...
Hi, Speex-dev
I've been able to get Speex to compile on SM400M(MIPSII) with problems.
------ Rebuild All started: Project: speexenc, Configuration: Debug SM400M
(MIPSII) ------
Deleting intermediate and output files for project 'speexenc', configuration
'Debug|SM400M (MIPSII)'
Compiling...
getopt.c
getopt1.c
skeleton.c
speexenc.c
.\speexenc.c(501) : warning
2004 Aug 06
2
rgding VAD
hi,
How do i detect whether there is silence in media using speex?
Is there any API which decides that the audio data only contains
silence?
Basically i will have PCM linear data, I want to know whether it is
complete silence.
Is it that during encoding speex_bits_write will return a lesser
number if the audio at byte_ptr contains silence?
thanx,
Rahul
--
Rahul Arvind Jadhav
2012 Mar 10
3
problem: The decoded frame is not as the original one
Hi All,
i need your help in determining the problem in the following sample code (taken from speex manual) for fixed point encoding.
i tested encoding a 160 sample frame and then decoding it back But The problem is that the decoded frame is totally different from the original frame(see output below).What is the possible reason for this?.thanks for any help
#include<stdio.h>
2004 Aug 06
0
Re: Please confirm your message
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<head>
<title></title>
</head>
<body>
<a class="moz-txt-link-abbreviated" href="mailto:speex-dev@xiph.org">speex-dev@xiph.org</a> wrote:
<blockquote type="cite"
cite="mid1050398492.11049.TMDA@motherfish-II.xiph.org">
<pre
2005 Jun 07
2
input_frame format
/input_frame/ is a /(float *)/ pointing to the beginning of a speech frame
What is the range on the floats in the input_frame that speex_encode()
needs? The library that I'm using to get the sound gives me floats that
are between -1.0 and +1.0.
I was assuming that this is also the case for speex, but I don't see it
documented.
I'm thinking now that maybe this is not the case for
2005 Jun 23
2
input_frame format
The API reference says it is "+-2^16 range."
Which is right? I've yet to successfully encode or decode anything.
Jean-Marc Valin wrote:
>It is documented and the range is +-32767
>
> Jean-Marc
>
>Le mardi 07 juin 2005 ? 11:59 -0500, Matt DeMoss a ?crit :
>
>
>>/input_frame/ is a /(float *)/ pointing to the beginning of a speech frame
>>
2007 Sep 22
1
Echo Cancellation Problem -- with sound sample
Hello all,
I am trying out the echo cancellation of Speex (1.2beta2) on Windows XP. I use the Windows Media API (i.e. waveInOpen, waveOutOpen etc) for playback and capture, but I cannot make echo cancellation works in my use case. Here is a description of what I tried: (the sound is in 8kHz and 16 bits per sample, the frame size is 240, tail_length is long enough to cover the far end to near end
2004 Aug 06
3
What is the format of the PCM/WAV data for speex_encode & speex_decode?
I'm confused about the format of the PCM/WAV data for speex_encode &
speex_decode
speex_encode(enc_state, input_frame, &bits);
In the manual, it says "input_frame is a (float *) pointing to the beginning
of a speech frame" (for encode)
But I've found that in speexenc.c and testenc.c, short* is used instead of
float*
So, isn't it signed 16 bit samples(if
2007 Jun 26
2
number of samples in input_frame
Hi all
Sorry if this is a dumb question: does the input_frame passed to
speex_encode_int *have* to be frame_size samples long?
e.g., If I only have 100 samples left to encode (which is less than the
frame_size of 160 samples), can I just use an array that contains 100
samples, or do I need to create an array containing the 100 "real"
samples plus 60 null samples at the end?
2004 Aug 06
0
rgding VAD
> How do i detect whether there is silence in media using speex?
> Is there any API which decides that the audio data only contains
> silence?
> Basically i will have PCM linear data, I want to know whether it is
> complete silence.
Well, the best way is probably to turn VAD *and* DTX on. Then when
there's silence, the speex_encode function will return zero, which
2006 Oct 27
2
Echo Canceller trouble in 1.2beta1
Hi Folks,
I am having trouble using speex_echo_cancel. As a starting point, I am
using the testecho.c source code. I compiled the 1.2beta1 version. I
have not tried any other versions of speex.
The document says that the order of arguments to Speex_echo_cancel is
(echo_state, input_frame, echo_frame, output_frame, residue) where
"input_frame" is as captured from mic and
2004 Aug 06
1
rgding VAD
On Tue, 2003-04-15 at 11:31, Jean-Marc Valin wrote:
> > How do i detect whether there is silence in media using speex?
> > Is there any API which decides that the audio data only contains
> > silence?
> > Basically i will have PCM linear data, I want to know whether it is
> > complete silence.
>
> Well, the best way is probably to turn VAD *and*
2006 Sep 21
1
echo cancellation causes assertion
Hello,
i'm adding echo cancellation to my voip application, but when i call
speex_echo_capture() or speex_echo_playback() causes an assertion
failed, it seens that there is a delete in any where.
i've encapsulated echo canceller in a class that storage the state and
simply call the functions:
void EchoCanceller::Playback(short *echo_frame)
{
speex_echo_playback(echo_state,
2012 Mar 11
0
problem: The decoded frame is not as the original one
Hi All,
i need your help in determining the problem in the following sample code (taken from speex manual) for fixed point encoding.
i tested encoding a 160 sample frame and then decoding it back But The problem is that the decoded frame is totally different from the original frame(see output below).What is the possible reason for this?.thanks for any help
#include<stdio.h>
2007 Mar 05
1
Performance of the acoustic echo canceller
Hi All, I am working on my master project to port the Speex Acousic Canceller to FPGA. But I am not able to get a satisfied result in its performance whenI integrated it to a SIP softphone as my first step. The SIP softphone calls to a PSTN gateway and lands to my land line phone. I can hear the echo of my every word while I talks on the land line phone. I am using G.711 codec, frame_size 80
2006 Dec 15
2
About "Convert 8->16 bits"
Hi everybody,
I have been using speex-1.2beta1 and my input data is 8-bit unsigned so I
know that I should convert from 8 to 16 bits. I've done the convertion as
following.
for(int i=0; i<160; ++i)
{
input_frame[i] = (short)( (data[2*i] << 8) | data[2*i+1]);
}
When my codec application didn't work right, I think that the reason is an
error at this
2008 Feb 08
1
Echo Canceller on Windows Mobile
Hi Jean Marc,
We are running the speex echo canceller code on a Windows Mobile smartphone using a TI OMAP 201MHz 850. We are making voip calls and audio is working without echo canceller code. Simply adding the following 2 functions whether the echo cancellation is wired in (ie we use the output frame ) or not performance becomes terrible. Note 2 separate threads are used to handle audio.
2005 Oct 09
0
Fw: problem in encoder/decoder
-------Original Message-------
From: Eid
Date: 10/09/05 14:07:44
To: speex-dev@xiph.org
Subject: problem in encoder/decoder
hi all,
I'm developing an app to broadcast voice over web. i tried to use speex and
download ver 1.04 documentation and use it to develop encoding and decoding
but after decoding voice is damaged i attach my encode/decode function.
BOOL