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Topic: Speex


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Ogg
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In the News (Sat 20 Jul 19)

  
  dBpoweramp Codec Central Speex
Windows 98 or newer, dBpoweramp R12 or newer required.
Speex is a voice optimized codec, that is it is very efficient at encoding speech, it should not be used for non-voice (ie music) encoding.
Speex is Open Source and forms part of the Ogg Vorbis stable.
www.dbpoweramp.com /codec-central-speex.htm   (61 words)

  
  Speex: a free codec for free speech
Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps.
Note that Speex has a number of features that are not present in other codecs, such as intensity stereo encoding, integration of multiple sampling rates in the same bitstream (embedded coding), and a VBR mode; see our comparison page for more.
The Xiph OSC and the Speex Parrot logos are trademarks (™) of Xiph.Org.
www.speex.org   (590 words)

  
 Speex frontend   (Site not responding. Last check: )
Speex is a free, open source, multi-platform, speech codec.
You need the Speex binaries to do the actual coding.
BTW: although my name (Speek) resembles the name of the encoder (Speex) I have nothing to do with it other then that I made the frontend.
members.home.nl /w.speek/speex.htm   (108 words)

  
  Speex - Brickfilms   (Site not responding. Last check: )
Speex is an audio compression format that is optimized for the relatively low bandwidth requirements of the spoken voice.
Speex takes advantage of this fact as well as other characteristics of the human voice to produce files with extremely high compression ratios.
Although the compression levels afforded by the Speex codec is useful in many circumstances, it is not particularly useful for brickfilming purposes where the majority of the data is owing to the video information that has to be compressed.
www.brickfilms.com /wiki/index.php?title=Speex   (104 words)

  
 Speex   (Site not responding. Last check: )
Speex is licensed under Xiph's BSD-like license and can be used with the their Ogg container format or directly transmitted over UDP/RTP.
The Speex codec uses the Ogg bitstream format, and the Speex designers see their project as complementary to the Vorbis general-purpose audio compression project.
Speex is a lossy format, meaning that quality is permanently degraded to reduce file size.
www.buzznet.com /tags/speex   (115 words)

  
 [No title]
Speex payload For the purposes of packetizing the bit stream in RTP, it is only necessary to consider the sequence of bits as output by the Speex encoder [7], and present the same sequence to the decoder.
Speex frames MUST NOT be fragmented across multiple RTP packets, An RTP packet MAY contain Speex frames of the same bit rate or of varying bit rates, since the bit-rate for a frame is conveyed in band with the signal.
Speex codecs [7] are able to detect the bitrate from the payload and are responsible for detecting the 20 msec boundaries between each frame.
www.watersprings.org /pub/id/draft-ietf-avt-rtp-speex-00.txt   (2635 words)

  
 JSpeex - Java Implementation of Speex
JSpeex is a Java port of the Speex speech codec (Open Source/Free Software patent-free audio compression format designed for speech).
The current version of the JSpeex library is 0.9.2 and it is based on the code from Speex 1.0.3.
As well as the JSpeex library, there is also JavaSound player that uses the library to play any Speex encoded audio file.
jspeex.sourceforge.net   (90 words)

  
 Speex narrowband mode
In Speex, the innovation signal is quantized using shape-only vector quantization (VQ).
Except for the absence of (backward-adaptive) gain, the technique used in Speex is similar to G.728 (LD-CELP).
There are 7 different narrowband bit-rates defined for Speex, ranging from 200 bps to 18.15 kbps, although the modes below 5.9 kbps should not be used for speech.
speex.sourceforge.net /manual/node6.html   (564 words)

  
 Hydrogenaudio Forums > Speex player for pocket pc
Speex will be too slow on devices without a floating point unit.
Sure Speex will work on PPC but it's not suitable for a real-time voice application like VoIP because the floating point calculations done during the encoding will be slower than the speaker.
I think whatwas being referred to was using Speex for encoding recorded spoken voice (audiobooks, etc.) to listen to on the PPC.
www.hydrogenaudio.org /forums/lofiversion/index.php/t21971.html   (1498 words)

  
 Speex - voip-info.org
Finally, Speex is part of the GNU Project and is available under the Xiph.org variant of the BSD license.
Speex is a powerful codec due to its flexibility.
I have Asterisk 1.2.2 compiled with Speex; I grabbed the source code for Speex and built it, and even verified with strace that the asterisk binary is loading up codec_speex.so.
www.voip-info.org /wiki/view/Speex   (0 words)

  
 Speex without Beta? - Ventrilo Tech Support
I'm looking at how painful a transition to Speex would be so Mac users can connect, and I doubt everyone who uses our vent server would upgrade, especially to a beta version.
I was trying to figure out if noone ever even tried speex or maybe problems, but then for last year i used vent on so many machines and with friend's asked to install and connect to Speex configured servers never had problem either.
I doubt there is a problem with Speex, after all, in Beta post it only states "improved quality", well, I would not complain.
www.ventrilo.com /forums/showthread.php?mode=hybrid&t=11966   (0 words)

  
 Download Speex 1.2 Beta 2 - Designed for compressing voice at low bitrates - Softpedia
Speex is a useful audio compression utility that will come in handy.
Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps.
Note that Speex has a number of features that aren’t in other codecs such as intensity stereo encoding, integration of multiple sampling rates in the same bitstream, and a VBR mode...etc.
www.softpedia.com /get/Multimedia/Audio/Audio-Codecs/Speex.shtml   (0 words)

  
 Speex: A free codec for free speech
Oh, and before anyone starts worrying, the format (bit-stream) itself has not changed, so Speex is still compatible with version 1.0 and will continue to be in the future.
Non-codec improvements include a extension (easier to use) to the echo canceller API and a Speex-independent version of the jitter buffer.
The Xiph OSC and the Speex Parrot logos are trademarks (™) of Xiph.Org.
www.speex.org /news   (0 words)

  
 Google Talk unterstützt freien Speex-Codec - Golem.de
Dieser basiert auf dem CELP-Kompressionsverfahren und wurde speziell für den VoIP-Bereich entwickelt.
Speex basiert auf dem Audiokompressionsverfahren CELP und integriert Schmalband- (8 kHz), Breitband- (16 kHz) und Ultra-Breitband-Kompression (32 KHz) in einem Bitstrom.
Der Codec wurde speziell für den Einsatz in VoIP-Anwendungen entwickelt, unterliegt einer abgewandelten Variante der BSD-Lizenz und ist patentfrei.
www.golem.de /0610/48275.html   (0 words)

  
 Free-Codecs.com :: Download DirectShow Filters for Ogg Vorbis, Speex, Theora and FLAC 0.71.0946 : Installing DirectShow ...
Free-Codecs.com :: Download DirectShow Filters for Ogg Vorbis, Speex, Theora and FLAC 0.71.0946 : Installing DirectShow Filters for Ogg Vorbis, Speex, Theora and FLAC you will be able to play Ogg Vorbis, Ogg Speex, Ogg Theora and Ogg FLAC
Installing this package you will be able to play Ogg Vorbis, Ogg Speex, Ogg Theora and Ogg FLAC with Media Player or any other DirectShow application like The Core Media Player, Foobar2000...
- Winamp Speex decoder: is needed to play Speex (.spx) files with Winamp (2 or 5).
www.free-codecs.com /download/Filters_for_Ogg_Vorbis_Speex_Theora_and_FLAC.htm   (0 words)

  
 FreshPorts -- audio/speex
Unlike other codecs like MP3 and Ogg Vorbis, Speex is designed to compress voice at bitrates in the 2-45 kbps range.
In some sense, it is meant to be complementary to the Ogg Vorbis codec.
This ports is for the development version of speex, but the file format is compatibile with the base (1.0 and 1.1) versions.
www.freshports.org /audio/speex   (0 words)

  
 dsPIC DSC Speex Speech Encoding/Decoding Library
The dsPIC DSC Speex Speech Encoding/Decoding Library performs toll-quality voice compression and voice decompression.
The library is based on a modified version of Speex source code and features a 16:1 compression ratio.
The dsPIC DSC Speex Speech Encoding/Decoding Library is a modified version of the Speex speech coder and was made specifically for the dsPIC DSC family of Digital Signal Controllers (DSCs).
www.microchip.com /stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en023610   (0 words)

  
 Best free speex downloads. VoIPerized enables you to make free audio calls to other people. MP3(ID3v1, ID3v2), ...
Speex software: mp3 decoder,wav encoder,mp3,ogg,wma to wav, VoIPerized is a so called VoIP program, MP3, Ogg tag editing Import & Export TXT, XML and more.
ZOIPER 2.0 Free SIP and IAX is a user-friendly softphone, compatible with Asterisk or any other SIP or IAX capable system.
By using the open source Speex audio codec the audio quality is far higher than any normal telephone call.
www.freedownloadmanager.org /downloads/speex_software   (0 words)

  
 Speex - XiphWiki
The Speex homepage has all the project info.
These are some improvements that could be made to Speex.
Let us know if you'd like to work on one of them.
wiki.xiph.org /index.php/Speex   (115 words)

  
 Speakfreely Speex Codec   (Site not responding. Last check: )
The Speex project is aimed at providing an open-source low-bitrate speech codec to complement the vorbis music encoder.
The Makefile is designed for the speex source tarball to be unpacked in the speakfreely source directory, under a subdirectory called speex (without versioning in the name)
Speex Preprocessing is implemented to allow for software AGC(turned on in windows) and noise reduction(turned on in both).
www.2pi.info /software/sf_speex   (1308 words)

  
 [No title]   (Site not responding. Last check: )
Speex frames MUST NOT be fragmented across multiple RTP packets, An RTP packet MAY contain Speex frames of the same bit rate or of varying bit rates, since the bit-rate for a frame is conveyed in band with the signal.
Speex codecs [11] are able to detect the the bitrate from the payload and are responsible for detecting the 20 msec boundaries between each frame.
However, until that is finalized, Speex MAY be used in H.323 [6] by using a non-standard codec block definition in the H.245 [7] codec capability negotiations.
www.cs.columbia.edu /~hgs/rtp/drafts/draft-herlein-avt-rtp-speex-00.txt   (2817 words)

  
 Neuros: Forums
Someone is going to have to rewrite Speex to use integer arithmetic (just like for Vorbis with Tremor).
Also, Speex seems to be a fairly heavy-weight compression codec i.e.
Speex needs to have an integerized version written (I think someone may actually be working on this).
www.neurosaudio.com /community/forum/topic.asp?TOPIC_ID=134   (602 words)

  
 baudline solution - audio compression codecs
For the VBR codecs such as AAC, Vorbis, and Speex a pure sine wave test signal was used for the bit rate kbps calculation.
The Speex q=0 setting has an ENOB of +1.036 bits and a Hz error of -345.52 PPM which respectively are the lowest and the second worst seen in this compression codec survey.
Speex's performance improves at the higher quality levels with a fluctuating ENOB between 5 and 9 bits.
www.baudline.com /solutions/codec   (3213 words)

  
 Speex, the open source VoIP codec, close to a 1.2 final version – 21talks
The Speex project is part of the Xiph Foundation, the same that already challenged the MP3 audio format with its (Ogg) Vorbis format —; better, according to us.
Just like for the audio, Speex also relies on the Ogg format to store its bitstreams as files on a computer.
Xiph claims that Speex “has a number of features that aren’t in other codecs such as intensity stereo encoding, integration of multiple sampling rates in the same bitstream, and a variable bit rate mode”.
21talks.net /voip/speex   (268 words)

  
 LWN: The Speex RC3 Speech Codec   (Site not responding. Last check: )
The Speex FAQ clarifies the different goals of Speex and Ogg Vorbis: "Ogg is a ``container format'' for holding multimedia data.
Speex also uses the Ogg format to store its bit-streams as files, so technically they would be ``Ogg Speex'' files (I prefer to call them just Speex files).
Programmers who want to add Speex capabilities to their applications may want to have a look at the Programming with Speex (the libspeex API) section of the documentation, as well as the Speex API Documentation.
lwn.net /Articles/24349   (372 words)

  
 Speex and Open VoIP
Jean-Marc Valin, the lead author of Speex and a legitimate expert about audio coding, was nice enough to send me an email explaining why I was wrong, and also a number of other interesting details about audio codecs.
What happens is that Speex and other similar (*CELP) codecs encode the current frame (packet) using the previous frames (i.e.
The guys of the speech coding group at my university (the ones that came up with 729 and all) made the experiment and it clearly shows that adding redundancy is more efficient than encoding frames independently.
evanjones.ca /speex-voip.html   (1537 words)

  
 How to Install ListenUp
Speex is a handy format for uploading and storing voice data because it is so small.
ListenUp has the ability to decode Speex data, and the ability to write WAV files.
Assume you have a Speex file called msgxyz.spx and you want to create a WAV file called outmsg.wav.
www.javasonics.com /listenup/docs/speextowav.html   (443 words)

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