search for: 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 Library in resample this frame in 32KHz to 8KHz. Searching for it in Speex Doc, I found...

Because a wideband signal has both a narrowband part and a wideband part the first part of the wideband decode is to call the narrowband decode. In the fixed point version the signal generated from the narrowband decode is downshifted at the end. In this same version the wideband then upshifts the signal by the same amount. I would like...

...c (CVS). It reads "speex_warning ("More than to wideband layers found: corrupted stream?");" when it should be "More than two wideband layers..." "Christian.Buchner" <Christian.Buchner1@epost.de> writes: >> Is there any way to access only the narrowband portion of a wideband >> stream? > > Try encoding a stream in UWB or WB mode using speexenc. speexdec has > command line options you can use to force it to NB decoding only. So > yes, it is possible. And the implementation in speexdec.c should > show you how. > > Christi...

Hi all, When encoding narrowband with speexenc I notice the bitrate is the same for qualities 3 / 4, 5 / 6, and 7 / 8 (8000, 11000, and 15000 respectively). I didn't test this on prior versions of the encoder so I'm not sure if this is something new, but am curious if there is a difference between the above respective set...

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 speex-1.2beta3 >speexenc -u --quality 3 male.wav u3.spx Warning: Trying to...

Hello to all speex developers, I have question regarding payload length of narrowband speex in RTP. I were watching tcpdump of the xlite softphone and have found that it uses weird payload length namely 75 Bytes I went through various source and without success. To be clear: For 8000Hz sample in 20 ms that is 160 samples per frame. This makes 50 frames per sec. modes bit-rate...

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. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/2007...

...hat you need to do is: 1. Run the media frames through the Speex decoder (look at Speexdec or testenc_uwb). This will give you raw audio with a 32 KHz sample rate. 2. Use the resampler to convert the audio from 32 KHz to 8 KHz sample rate. 3. Run the 8KHz audio through a G711 encoder. For the narrowband case, Asterisk is doing steps 1 and 3. ----- Original Message ----- From: Thiago Maluf To: speex-dev at xiph.org Sent: Tuesday, March 17, 2009 4:59 PM Subject: [Speex-dev] Resample UltraWideBand to NarrowBand Hi List, Now I will send to you more specific what I am trying to do....

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 mode */ static const SpeexSubmode nb_submode4 = { -1, 0,...

...anged to 24-bit ones, but don't bother with that in the short term. Jean-Marc Barr, Russell a ?crit : > 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*/ > > >...

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 flag...

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@utdalla...

In a "normal" frame that doesn't have in-band signalling (which nobody seems to use anyway), the frame starts with the narrowband information. If the frame is in wideband, then this will be followed by a bit of wideband information that starts with a bit set to 1 (narrowband starts with a bit set to 0). Have a look at what the Speex decoder does. You may actually want to have similar code in a "null decoder". Jean...

...nferencing in conjunction with Speex, we are > currently beta testing a solution we developed that offers multi-point, > multi-party video and audio using the Speex engine for voice. > > http://www.wiredred.com/downloads/ecsetup.exe > > The fair and good audio settings are Speex narrowband, high quality is > HawkVoice and toll quality is PCM. Just curious, any reason you're not using Speex for high quality (at 18.2 and 24.6 kbps, I can't distinguish the coded from the original and 15 kbps is pretty close)? I'm also not sure I see the idea of narrowband PCM either, sin...

...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 narrowband quality (ie using two very low bitrate codebooks, one for narrowband and one for the 4-8kHz band - to match the same bitrate at quality 3)? If you have can you comment on the quality? (Looking through the Speex code, I noticed that at lower quality settings wideband mode basically reverts to narro...

Is there a way to tell during the NB decode if it was kicked off by the SB decode? I would like to avoid saturating and packing the output of the NB decode, only to unpack it for the SB. Thanks. -Fritz

Hi, Is there an easy way to get the size in samples of a Speex packet, without decoding the packet? If I receive a "narrowband packet" with - Zero or more wideband frames (must be skipped apparently) - Zero or more Speex inband requests - Zero or more user inband requests - One or more narrowband frames I need to know how much samples the packet contains to calculate jitter buffer values (e.g. how much samples are av...

...gt; Ivo Emanuel Gon?alves wrote: >> Just a heads-up, I received confirmation that Speex is now the default >> codec for the Jabber's Jingle VoIP protocol. > > Which we hope to finalize soon for broader adoption. :) That's good to hear. Are you supporting wideband or just narrowband? Jean-Marc

Hello to all speex developers, I have question regarding payload length of narrowband speex in RTP. I were watching tcpdump of the xlite softphone and have found that it uses weird payload length namely 75 Bytes I went through various source and without success. To be clear: For 8000Hz sample in 20 ms that is 160 samples per frame. This makes 50 frames per sec. modes bit-rate...

...be it's using wideband (although there's nothing that corresponds exactly to 75 bytes. If you send me the hexdump for one packet, I may be able to find out what it is. Jean-Marc Pawel Cyrta wrote: > Hello to all speex developers, > > I have question regarding payload length of narrowband speex in RTP. > I were watching tcpdump of the xlite softphone and have found that > it uses weird payload length namely 75 Bytes > I went through various source and without success. > > To be clear: > For 8000Hz sample in 20 ms that is 160 samples per frame. > This makes 50 f...