search for: wideband

If I encode something in ultra-wideband, can I decode it in wideband by chopping off bytes in every frame? John --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'u...

On Tue, Feb 18, 2003 at 06:09:43PM -0500, Jean-Marc Valin wrote: > Le mar 18/02/2003 ? 17:38, John Hayes a ?crit : > > If I encode something in ultra-wideband, can I decode it in wideband by > > chopping off bytes in every frame? > > All you have to do is use the --force-wb switch with speexdec. It will > decode as if the file were wideband, ignoring the ultra-wideband info. > It would also be possible to write a tool that strips off t...

...eex-dev/200306/0004.html Can somebody confirm that this list is correct? I am wondering about the following: - On the Speex website it says: "Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps." while the bitrates listed here are e.g. 84400 for wideband mono. - There is almost no difference between wideband mono/stereo and ultrawideband mono/stereo Best regards, Chris --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@...

Hello everyone. I would like to know which are the available bitrate using the ultra-wideband compression. Thank you! Paolo Gruppo Telecom Italia - Direzione e coordinamento di Telecom Italia S.p.A. ================================================ CONFIDENTIALITY NOTICE This message and its attachments are addressed solely to the persons above and may contain confidential information. I...

...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 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 enco...

This Friday's edition of the weekly VoIP Users Conference call is all about wideband audio (aka HD Voice) and conferencing. The guest for this call is David Frankel, CEO of ZipDX a commercial service that specializes in wideband conferencing. We expect an interesting call touching on many aspects of VoIP going beyond the traditional phone service, conference bridges, technical stan...

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...

...encoded data over RTP. 4. Upon receiving on the other side, feed the payload to a narrowband Speex decoderd. 5. Play the resulting PCM to the reproductor. However, currently I am stuck in point 4. All of a sudden, the STDOUT window appears and a huge list of the error messages "More than two wideband layers found. The stream is corrupted." flood the screen of the phone (btw: pretty scary sight :-) I found the message in the file nb_celp.c, in this section of code: wideband = speex_bits_unpack_unsigned(bits, 1); if (wideband) {...

...I could include it in the main Speex distribution. Jean-Marc Le mar 18/02/2003 à 20:57, Bernard Blackham a écrit : > On Tue, Feb 18, 2003 at 06:09:43PM -0500, Jean-Marc Valin wrote: > > Le mar 18/02/2003 ? 17:38, John Hayes a ?crit : > > > If I encode something in ultra-wideband, can I decode it in wideband by > > > chopping off bytes in every frame? > > > > All you have to do is use the --force-wb switch with speexdec. It will > > decode as if the file were wideband, ignoring the ultra-wideband info. > > It would also be possible to write...

I have read the speex manual, looked at the example code, but for some reason the first encoded byte does not have the wideband bit set and the mode bits are also wrong even though I am encoding in wideband mode. I am sure that I am doing something wrong, but I can't figure out what it is. I have included my code below.... I would expect that the MSB of the first encoded byte is 1 (wideband) and that the next 4 bits...

Hi, The ITU has been churning out a series of codecs which stretch older codecs to support wideband or super wideband and stereo. Does anyone know of these things being used in the real world? They push the idea of these things offering high compatibility, as the narrowband bitstream is embedded in the wideband stream. However, I'm skeptical this offers any real world advantage. Regards,...

Hello, We currently have code for sampling at 8 KHz at device layer. In order to have minimal code change while still doing wideband I am thinking of packing two 20 ms frames of the low band data as input to Wideband mode for encoding. Is this a feasible idea? I actually tried it out. Speech came out at the decoding end, but I could occasionally hear low pitched, high frequency background noise. Thank you, <p...

Hi! In a message posted on May 31 Jean-Marc wrote in a topic about AEC: > - set sampling rate to 8 kHz (at least for now) Does it mean that echo cancellation algorithm won't work in wideband mode? I can't get aec to work well in my application and I am wondering whether it's not a matter of using wideband instead of (preferred?) narrowband mode? Thanks in advance for any replies. -- Greetings, Mikolaj Zyromski

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 encode in ultra-wi...

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 -...

Hello! I am using speex in wideband mode and I'm trying to get AEC to work. It seems the algorithm is working, but the result is not satisfactory. Output signal of the algorithm still contains echo signal, although it's level is diminished and sounds like processed with low-pass filter. So the echo is audible, although it'...

Hi, On http://www.speex.org/docs/manual/speex-manual/node11.html#SECTION001140000000000000000 the bitrate for Speex Wideband mode 9 and 10 is 9 34,400 10 42,400 On http://tools.ietf.org/html/draft-ietf-avt-rtp-speex-03 the bitrate for Speex Wideband mode 9 and 10 is 9 34.2 kbit/s 10 42.2 kbit/s I believe the draft contains the right values: E.g. mode 10 Narrowband mode 7 -> 492 bits High band "mod...

Hi, Does Asterisk support wideband VoIP? Is there support for Speex 16 KHz? Thanks, Madhuri ____________________________________________________________________________________ Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit. http://farechase.yahoo.co...

Doing a little research before Friday's Voip Users Conference call with Dan Behringer. Are any of the newer Polycom wideband codecs implemented in v1.6? Specifically, G.722.1 or G.722.2? Thanks, Michael Graves mgraves <at> mstvp.com o(713) 861-4005 c(713) 201-1262 sip:mjgraves at mstvp.onsip.com skype mjgraves

[This email is either empty or too large to be displayed at this time]