similar to: More integer / ARM-specific optimizations

Hi Jean-Marc, Thanks for the quick response. Here are the numbers for our little ARM systems: CPU: ARM920T, 200Mhz Speex specs: Complexity 2, 5.95Kbps Encoding: ~30%, Decoding: ~4%, with Echo Cancellation / Pre-processor: > 85% Compilation: arm-linux-gcc -pipe -Wall -W -O2 arm-linux-g++ -pipe -fno-exceptions -fno-rtti -Wall -W -O2 Configuration: --host=arm-linux

Hi, There are long-term plans to have everything (including echo canceller and preprocessor) to fixed-point. However, I cannot say when/if that will happen. While the VAD/DTX should be too hard (even a decent float emulator will work), echo canceller and preprocessor would require quite a bit of work. Just to have an idea of how Speex does, would you mind sharing the results you have on ARM?

Hi all, I have recently added Speex support to my app (http://sbooth.org/Max/) and am in the process of creating a GUI for the user to control the codec parameters. I am new to Speex and as such I am not really sure which parameters are more important than others, and deserve prominent placement, etc. Is there a recommended GUI for people to follow or use as an example? Stephen

Hello, I'm try to run speex on some ARM processor. I'd like to cut away some speex features including VBR, ABR and preprocessor while still supporting VAD/DTX. But I've found some puzzles in the source code regarding VAD as below, 1) there are VAD related codes in the source file preprocess.c. Will VAD still work If I don't use the source file preprocess.c? 2)The speex manual

Hello, I am trying to use the DTX feature of speex to tell if the user is speaking. I have VBR, DTX and VAD turned on, but the function speex_encode always returns a non-zero value. It is my understanding that it should return a zero value when the encoder detects silence? Could anyone give me any clues to help figure out why this isn't working for me? I am using the 1.13 version of speex on

Could a method be added to use the VAD from the preprocessor to send the packet with the 'dtx_enable' flag in it, so the decoder on the other end knows it's in dtx mode? (and SPEEX_GET_DTX_STATUS returns 1) At the moment, I can hack around it by doing something like: if (VAD for prev frame && ! VAD for this frame) { iArg = 0;

I'm running a: for band in n w u do for quality in 0 1 2 3 4 5 6 7 8 9 10 do for complexity in 3 do for vad in "" "--vad" do for dtx in "" "--dtx" do echo speexenc -${band} --quality ${quality} --comp ${complexity} ${vad} ${dtx} input.${band}.wav

Hi Marc, Thanks for your quick response. So if VAD is enabled then VBR will be enable although it's a special VBR. How about take out the VAD code from the VBR and remove the code else? Lianghu On 10/24/06, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote: > > > 1) there are VAD related codes in the source file preprocess.c. > > Will VAD still work If I

Hi all, I'm using speex through my own python wrapper based on ctypes. In my application I'm forced to process relatively large chunks of audio data (250ms). I was able to supply sufficiently large buffer to the SpeexBits structure and then encode using (code snippet) _speex.speex_bits_reset(byref(self.bits)) for i in range(0, len - self.frameSize, self.frameSize):

Hello, in my project im using speex 1.2rc1 and the preprocessor VAD seems to only separate complete silence from not complete silence frames. The Speex Manual, you can read "The voice activity detector (VAD) provided by the preprocessor is more advanced than the one directly provided in the codec." but if you go to the source code in preprocess.c line 995 "/* FIXME: This VAD

? ? Hi Jean-Marc, When speech is played in speaker, we are feeding that speech to echo canceller for cancelling its echo from captured data and the echo canceller work very well. But when there is no speech, we are feeding samples of value zero to speaker and the same to echo canceller. But microphone is always capturing something. But when speech is played again after these zeros(silent

Hi, Is there are document where the interaction between all the configuration options of speex is explained? Speex seems to have CBR, VBR and ABR. You can also use SPEEX_SET_QUALITY (SPEEX_SET_VBR_QUALITY) and SPEEX_SET_BITRATE which I suppose can't be set at the same time. Is there a list of possible combinations somewhere? I also have another question related to jitter. To minimize jitter,

Hi I apologise if the following message is inappropriate for this list. However, I feel this is the only place where I can get some help with my problem. BOOL CALLBACK RecordProc(HRECORD hRecord, void *buffer, DWORD length, DWORD user) { try { long sent = 0; long inputOffset = 0; long outputOffset = 0; long nbBytes = 0; char *outputBuffer = NULL;

Jerry, Thanks for the response; basically, I need to get just the narrow band working now (maybe use advanced features such as jitter buffer, echo cancellation, VAD, etc in the future); the DSP will do the encode and decode simultaneously as data are available. My main objective is just do a voice application that runs on the ARM side of the DaVinci with the codec running on the DSP side; the

Hi there, I enable DTX and VAD in speex_encode to detect whether there is silence in voice data. But the same programme got different result on my computers. The function speex_encode always return 38 on one of my computers although it is silence. On all other computers the function speex_encode return 1 when it is silence. It means DTX and VAD doesn't work on particular OS or PC. Do anyone

Hi, im working on a voIP application. In order to reduce the traffic, decided not to send "silence" blocks. Firstly i used an algorithm based on the volume to determine what is silence, and now im using the return value of the preprocessor to determine that. In both cases, after any not sent block, the next block of sound i send starts ok, then makes a little "pause" and

Hi Jean-Marc, I am developing a voice chat for win32 using speex,when I do echo cancellation, after 2 seconds adaptation, the echo canceller work very well,but after process silent(zero) echo signal(when enabled VAD,DTX),it work very bad,I have to reset it, it seems adapt faster then do not rest it, so I always here echo produce by my fisrt two second speech,how can I solve this problem?

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*

Thanks Jean-Marc. Is there a Speex trunk for the C64xx I can use? Or do I have to figure what options to turn on (in configure) when building the library? Thanks. Regards, Andy Ngo ----- Original Message ---- From: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> To: ndno72-speex@yahoo.com Cc: jtrantow@ieee.org; speex-dev@xiph.org Sent: Tuesday, December 5, 2006 2:52:02 PM Subject:

Hi, I am looking how to setup speex codec in codecs.conf for 8 Kbps and 6 Kbps. In config file are many parameters for setting. I don't know what is need to change for narrowbad like 8 Kbps and 6 kbps. Any suggestion? [speex] ;0-10 quality => 4 ;0-10 complexity => 4 ; true / false enhancement => true ; true / false vad => false ; true / false vbr => false ; 0 = off, otherwise,