similar to: Speex configuration

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,

On 2010-04-11 10:09, Randy Yates wrote: > If I specify VBR mode via > > speex_encoder_ctl(pSpeexEncoder, SPEEX_SET_VBR,&isTrue); Try: speex_encoder_ctl(pSpeexEncoder, SPEEX_SET_ABR, &desiredRate);

Hi, I'm about finished developing a QuickTime component that supports Speex (on MacOS X and Windows).. As it is now the user can set complexity (SPEEX_SET_COMPLEXITY) and quality (SPEEX_SET_QUALITY / SPEEX_SET_VBR_QUALITY) and to wether to use VBR or not. Will these options make it possible to produce all combinations of bitrates/qualities? Or should I also use

Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> writes: > Quality and bit-rate are different ways of specifying exactly the same > thing. Complexity is orthogonal. That clears it up - thanks. Is this in the manual? --Randy > > Jean-Marc > > On 2010-04-03 08:28, Randy Yates wrote: >> Jean-Marc: I know you're seeing these - how about a response? >>

Hi Conrad, Thanks a lot for the info. This is exactly what I needed. We want to use speex in our IP telephony client and I was indeed trying to put together a GUI configuration screen. Best regards, Chris > On Tue, May 20, 2003 at 06:04:39PM +0200, Chris Flerackers wrote: >> Hi, >> >> Is there are document where the interaction between all the configuration >> options

Hello, I'm new in using speex and programming with it. So, please help me to be more clear about it. I'm trying to write a voice decoder and encoder program using libspeex and using its variable bit-rates feature. At the encoder section I set the bit-rate of the output stream by setting "SPEEX_SET_ABR" option using this command:

Hi all, I have a problem when I am encoding (or decoding) stereo audio. With mono data, things are fine and everything works without any problems. When I try to decode stereo data, all I get is a static sound - similar to that of a radio not tuned to any specific station. I wonder what might be wrong? Below is the code, first, of the encoder and next that of the decoder. Any information or

I have two questions: 1. ?I would like to enable VBR with the Speex codec for VoIP communications. Is this setting made within VoIP clients themselves or is it a setting that must be changed on the specific version of Speex (for example, via command line)? 2. If not, is there any way to create RTP packets via the Speex command line? (The goal is to view the lengths of the packets created by

Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> writes: > On 2010-04-03 23:56, Randy Yates wrote: >> The sentence "Unlike some other speech codecs, it is possible to control >> the tradeoff made between quality and bit-rate" implies to me that they >> are NOT the same thing. > > This sentence should read: "tradeoff made between quality and

> 16 bit ints have a range of -32768 to 32767. If you divide > -32768 by 32767.0 you end up with -1.00003051850948 which > is a bad thing. > > Try normalizing with a value of 32768.0. No. Speex expects values in the +-32767 range, not +-1.0. Just converting from int16 to float *is* the right thing to do. Jean-Marc -- Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>

Hi,I'm having performance issues encoding with speex on an iphone4 + iOS5. The same code yields excellent results on iPad2 + iOS5, Mac OS X 10.6 as well as Windows 7. The call to speex_encode_int is takes 0.0065 to complete. Because encoding is so latent the receiver incurs underruns. Here is my speex setup: ? ? unsigned val = 0; ? ? /**? ? ?* Initialize the encoder in narrow band mode.? ?

Hi, I am an user of speex codec.Can I ask some question about the speexcodec 1.2beta2 on installed to linux(fedora 6) thanks! After I downloaded the latest version of codec then I type the commands to install : configure -prefix=/home/...../test -enable-shared -enable-static make make install then I try to compile my encode.c here is the encode.c of mine: =====================================

Hi i'm developing a sort of VoIP application for my ipaq using speex... I'm still at beginning and i have many problems encoding and decoding my wav files....output is only noise! Why? I'm using Libspeex 1.1.3, Embedded VisualC++ 3.0, Ipaq 3850(206 MHz Intel® Strong ARM 32-bit RISC Processor) PocketPC 2002 (Windows CE 3.0). Libspeex is complied with the definition of

In my experience most of the jitter related issues are because people are using too small of audio buffer sizes that match the framing size of Speex - particularly in Windows. This isn't a problem with Speex, but as a programmer you should collect and append a few frames to match the size of your output audio frame buffer before attempting to play the sound. -----Original Message----- From:

hi, im a student from a local university in our place. i'm not sure if this is the place to post this question so please pardon me if im wrong. my questions is that when i transfer speex encoded samples through a rtp session wire, upon receiving the samples i immediately decode and play them, but i get a crackling sound when i decode and play each sample received. 1) i used 160*5 as my wave

Hi, Speex is progressing and I've started thinking about the next 1.2 release (don't hold your breath). Though the bit-stream won't change, the API likely will. The API for 1.1.x already differs from 1.0.x because the speex_encode and speex_decode now use shorts instead of floats. Now, since I'm changing the API anyway, I thought I might as well fix things that might be annoying

Jean-Marc and others, We are using Speex inside our Video Conferencing application and have some questions about the trade-off of complexity vs bitrate. A little background information is needed: 1. For us the actual bit-rate isn't that big a deal. Speex running at 14kbps or 8 kbps is minor compared to the video traffic running at 128, 256 or 384 kbps. 2. We care a little about

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;

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Hello, In the internet draft describing the SDP parameters for speex I find this: mode: Speex encoding mode. Can be {1,2,3,4,5,6,any} defaults to 3 in narrowband, 6 in wide and ultra-wide. In the documentation I can only find the following request: SPEEX_SET_MODE There is no description though what this request does. I think the mode somehow maps to the bitrate, but I