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Topic: ACELP

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	ACELP.net Evaluation Executable
		Microsoft clearly recommends using the ACELP® codec by VoiceAge.
		ACELP®.net, like prestigious standards such as EFR GSM, IS-136, TETRA, G.723.1, G.729 and G.729 Annex A, is based on ACELP® technology.
		This state-of-the-art technology has now been adapted to meet the needs of IP networks and the PC platform by using an improved, net-adapted packetization method that outperforms conventional approaches.
	www.voiceage.com /acelp_eval.php (264 words)

	ACELP . Enpsychlopedia
		Algebraic Code Excited Linear Prediction or ACELP is a speech encoding algorithm where a limited set of pulses is distributed as excitation to linear prediction filter.
		The ACELP method is widely employed in current speech coding standards such as AMR, EFR, AMR-WB and ITU-T G-series standards G.729 and G.723.1.
		ACELP is a registered trademark of VoiceAge Corporation.
	www.enpsychlopedia.com /psypsych/ACELP (119 words)

	[Speex-dev] Differences between ACELP and CELP.... Reloaded (Site not responding. Last check: 2007-10-26)
		It means that the fixed codebook (cb_search.c) is not "real" codebook (as contained in the *table.c files), but rather an algebraic (implicit) one, where each entry can be computed directly from the codebook index.
		The main advantage of ACELP lies in the fact that the search is much faster, which allows larger codebook for the same complexity.
		In terms of Speex, implementing ACELP would mean replacing cb_search.c and most likely changing a bit how the fixed codebook gain is implemented too.
	lists.xiph.org /pipermail/speex-dev/2005-March/003133.html (229 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-26)
		The ACELP vocoder has a bit rate of 7.2 kbit/s including forward error correction (FEC).
		The ACELP vocoder algorithm is based on the CELP coding model, but ACELP codebooks have a specific algebraic structure imposed upon them.
		In ACELP a block of N speech samples is synthesized by filtering an appropriate innovation sequence from a codebook, scaled by a gain factor g c, through two time varying filters.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=ACELP (234 words)

	ACELP (Algebraic Code Excited Linear Prediction) - Glossary Entry - Mobile Phone Directory
		Algebraic Code Excited Linear Prediction, or ACELP, is a speech compression system, used to provide a good standard of speech quality when the network is operating at low data rates (i.e.
		The analogue voice signal is converted to a digital data signal, so that it can be compressed for transmission over the network, and the process is then reversed at the other end when the digital data is converted back to an analogue voice signal.
		The technology associated with ACELP is defined by the ITU-T (International Telecommunications Union-Telecommunication Standardization Sector) and this has been used for a long time as a standard on the Internet for voice applications, being integrated into software such as Microsofts MediaPlayer?.
	www.mobile-phone-directory.org /Glossary/A/ACELP.html (167 words)

	Windows Media Service
		Use the Spiro Labs ACELP audio codec when encoding audio content that is speech only and where mono audio is acceptable.
		The WMA version 8 codec has a much wider frequency and bit-rate response; the ACELP codec is acceptable for voice only audio at lower bit rates.
		Encoded using the ACELP codec which is particularly suited to speech at low bit rates.
	webhelp.ucs.ed.ac.uk /services/media/winmedia_encoding.html (678 words)

	[Speex-dev] Re: Speex, ACELP, G.729 (Site not responding. Last check: 2007-10-26)
		Speex is CELP (Code-excited linear prediction), but not ACELP (Algebraic CELP).
		I have nothing against ACELP, but I couldn't use it because of patent issues.
		I had thought that ACELP yielded much smaller files, but now I'm > not sure because I've listened to what I think were 16kbps MP3 files > (????) with Apple's ITunes that sounded pretty good...
	lists.xiph.org /pipermail/speex-dev/2005-August/003603.html (301 words)

	acelp Online Resources
		Many acelp websites offer a no obligation period with a guarantee of full refund of the purchase price if you return the goods in a satisfactory condition.
		Internet shopping for acelp is rapidly growing and this means high competition between sites selling and marketing acelp goods or services.
		This competition is good for you because it means everyone selling acelp has to operate their business to high ethical and professional standards.
	www.talkonthenet.com /voip-rating/acelp.html (173 words)

	MediaCoder Audio Video Glossary
		AMR uses different techniques, such as Algebraic Code Excited Linear Prediction (ACELP), Discontinuous Transmission (DTX), voice activity detection (VAD) and comfort noise generation (CNG).
		The codec provides excellent speech quality due to wider speech bandwidth of 50 - 7000 Hz compared to narrowband speech codecs which in general are optimized for POTS wireline quality of 300-3400Hz.
		Another main improvement is the use of transform coding additionally to ACELP.
	mediacoder.sourceforge.net /glossary/amr.htm (446 words)

	Press Releases (2000 - 2005)
		This standard gives a description of the ACELP speech and channel codec for a TIA-enhanced full-rate codec.
		The codec consists of a 7.4 kb/s ACELP speech codec and two channel codecs (forward error correction): a 5.6 kb/s channel codec and a 6.5 kb/s channel codec.
		Section 1 gives a general description of the speech coder and sections 2 and 3 give more detailed descriptions of the speech encoder and the speech decoder, respectively.
	www.tiaonline.org /business/media/press_releases/legacy.cfm?parelease=02-08 (298 words)

	ACELP in speechcoding (Site not responding. Last check: 2007-10-26)
		Hi, sorry for posting this url late but it will be helpful to all people w...
		I have a few doubts in the ACELP part of G.723.1 encode...
		Dear Ramya, I guess you're interested in G.723.1 instead, which is the ACELP 5.33....
	www.dsprelated.com /speechcoding/keyword/ACELP.php (207 words)

	Distinguished Author Speaks at Saint Vincent College - Saint Vincent College
		Jamie Caridi, assistant vice president and dean of students, decided to organize ACELP after students participating in the first course expressed interest in taking part in more leadership activities.
		Unlike the curriculum of the first course, which consisted of mostly lectures, written assignments and a ropes course to develop teamwork skills, ACELP will involve very few lectures.
		Caridi views the new course as a type of “graduate program” in which the students will do most of the work on their own and build on the skills they gained in the first program.
	www.stvincent.edu /distinguished_author_speaks_at_saint_vincent_college?func=nextThread (598 words)

	In the News
		VoiceAge Corporation develops narrowband and wideband low bit-rate audio and multimedia compression solutions for wireless 2G, 2.5G, 3G, and voice-over-packet networks.
		As experienced daily by hundreds of millions of users worldwide, VoiceAge's standard and proprietary solutions, built on the world-renowned ACELP® technology, ensure unsurpassed multimedia experience.
		VoiceAge, SPOTxde and ACELP are trademarks of VoiceAge Corporation.
	www.acelp.net /news6.php (331 words)

	acelp Resources
		Our website has been logically and simply structured to enable you to navigate the relevant acelp links, make direct contact with the relevant acelp website, purchase from that website and to return for subsequent trading.
		We certainly hope we have and that you will enjoy interacting with the acelp merchant we have sourced.
		All you have to do is click one of our acelp links and you'll be taken to the best acelp site on the web.
	www.talkonthenet.net /videoconference/acelp.html (302 words)

	CS-ACELP - Creativyst(R) Glossary of industry terms. (Site not responding. Last check: 2007-10-26)
		Conjugate Structure Algebraic Code Excited Linear Prediction - Or Conjugate Structure ACELP - A compression technique for converting analog speech into a digital data stream.
		It represents an improvement in latency and other QoS attributes over CELP, and ACELP.
		CS-ACELP is used to improve bandwidth utilization in audio codecs, such as G.729.
	www.creativyst.com /cgi-bin/M/Glos/GetTerm.pl?GetTerm=CS-ACELP&WL=C (68 words)

	ACELP Technology
		The Technology is now the reference for 8 voice compression world standards and its importance is recognized in the market.
		The close collaboration and synergy developed since 1993 between the Research Group and the company Sipro Lab Télécom contributed to a significant degree to the technical-commercial success of the Technology ACELP® and of its applications in the market of the Internet and telephony with and without wire.
		On August 25, 1999, the University and Sipro Lab Telecom created a new company, VoiceAge Corporation, dedicated to the development and the valorization of the 2nd generation of ACELP products: ACELP.NET, ACELP.WIDE, ACELP.LIVE.
	www.usherbrooke.ca /uilo/accomplish/acelp.html (182 words)

	Mathtools.net : Reviews
		ACELP (Algebraic Code Excited Linear Prediction) is an efficient technology for speech compression at bit rates around 8kbps.
		ACELP achieves its efficiency through the use of algebraic codebook that requires no storage with fast searching procedure.
		Any information such links contain may be used by The MathWorks and the public, both within and outside the country from which you posted.
	www.mathtools.net /cgi-bin/mathtools/review.cgi?ID=13324 (118 words)

	Advantages & Disadvantages of ACELP & QCELP
		Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP.
		ACELP and QCELP offer better performance in terms of the quality of output
		> disadvantages of ACELP & QCELP, when compared to CELP.
	www.dsprelated.com /groups/speechcoding/show/1065.php (116 words)

	Hydrogenaudio Forums > speech codecs overview
		Twin VQ CELP (Code Excited Linear Prediction) is not a codec itself, but a widely used speech coding technique.
		AMR codecs are used in GSM so they could have been mentioned under that heading as well.
		I think NB is the same type as GSM-EFR, i.e ACELP.
	www.hydrogenaudio.org /forums/lofiversion/index.php/t14141.html (1292 words)

	NEWSLETTER 115 (Site not responding. Last check: 2007-10-26)
		When VSELP is used in medium to low signal strength areas, voice quality tends to deteriorate, so Telecom implemented some local changes at its cellsites.
		These resulted in some improvement, but the gains were not considered optimum, so Telecom introduced the later ACELP vocoder for both cellsites and cellphones at the end of 1998.
		Unfortunately, it is not possible to optimise digital network parameters for both types of vocoders and In view of the improvements that can be achieved for users by increased penetration of ACELP, Telecom would prefer to convert its network fully to ACELP and optimise parameters for this protocol.
	www.telepermit.co.nz /nl115.html (2212 words)

	ACELP - OneLook Dictionary Search
		We found 5 dictionaries with English definitions that include the word ACELP:
		Tip: Click on the first link on a line below to go directly to a page where "ACELP" is defined.
		Phrases that include ACELP: cs acelp, ld acelp
	www.onelook.com /?ls=a&w=ACELP (76 words)

	Smartphone & Pocket PC magazine Forum - ACELP codecs
		Although this is a Windows Media Audio format stream I have discovered that the problem is that the stream is encoded using ACELP codecs.
		At present time I've not been able to find a player that can support the ACELP codec.
		My best suggestion would be to re-encode the stream with Windows Media Encoder.
	www.pocketpcmag.com /forum/topic.asp?TOPIC_ID=4648 (247 words)

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