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Text of the page (random words):
g 723 1 wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 use 2 features 3 licensing 4 see also 5 references 6 external links toggle the table of contents g 723 1 6 languages español 日本語 한국어 polski русский yorùbá edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia itu t recommendation g 723 1 dual rate speech coder for multimedia communications transmitting at 5 3 and 6 3 kbit s status in force year started 1996 latest version 05 06 may 2006 organization itu t base standards g 721 related standards g 726 domain audio compression license freely available website https www itu int rec t rec g 723 1 g 723 1 is an audio codec for voice that compresses voice audio in 30 ms frames an algorithmic look ahead of 7 5 ms duration means that total algorithmic delay is 37 5 ms 1 its official name is dual rate speech coder for multimedia communications transmitting at 5 3 and 6 3 kbit s it is sometimes associated with a truespeech trademark in coprocessors produced by dsp group 2 this is a completely different codec from g 723 there are two bit rates at which g 723 1 can operate 6 3 kbit s using 24 byte frames using a mpc mlq algorithm mos 3 9 5 3 kbit s using 20 byte frames using an acelp algorithm mos 3 62 use edit g 723 1 is mostly used in voice over ip voip applications due to its low bandwidth requirement music or tones such as dtmf or fax tones cannot be transported reliably with this codec and thus some other method such as g 711 or out of band methods should be used to transport these signals the complexity of the algorithm is below 16 mips 2 2 kilobytes of ram is needed for codebooks g 723 1 is a required audio codec in the h 324 itu t recommendation for h 324 terminals offering audio communication in 3gpp 3g 324m specification support for g 723 1 is not mandatory but recommended features edit sampling frequency 8 khz 16 bit 240 samples for 30 ms frames fixed bit rate 5 3 kbit s with 20 byte 30 ms frames 6 3 kbit s with 24 byte 30 ms frames fixed frame size for each rate 5 3 kbit s with 20 byte 30 ms frames 6 3 kbit s with 24 byte 30 ms frames algorithmic delay is 37 5 ms per frame with 7 5 ms look ahead delay g 723 1 is a hybrid speech coder with high bit rate using multi pulse maximum likelihood quantization mp mlq and low bit rate using algebraic code excited linear prediction acelp the complexity of the algorithm is rated at 25 using a relative scale where g 711 is 1 and g 729a is 15 g 723 1 annex a defines 4 byte silence insertion descriptor sid frame for comfort noise generation psqm testing under ideal conditions yields mean opinion scores of 4 08 for g 723 1 6 3 kbit s compared to 4 45 for g 711 μ law psqm testing under network stress yields mean opinion scores of 3 57 for g 723 1 6 3 kbit s compared to 4 13 for g 711 μ law licensing edit as of january 1 2017 the patent terms of most patents applying to g 723 1 have expired with regard to the unexpired licensed patents of their g 723 1 patent license agreement the licensors of g 723 1 patents namely audiocodes orange sa and université de sherbrooke have agreed to license their patents under the existing terms on a royalty free basis starting january 1 2017 3 the authorized intellectual property rights licensing administrator for g 723 1 technology is sipro lab telecom 4 5 6 members of the g 723 1 patent pool are audiocodes france telecom université de sherbrooke nippon telegraph and telephone corporation and nokia 7 see also edit list of codecs comparison of audio coding formats rtp audio video profile references edit g 723 1 dual rate speech coder for multimedia communications transmitting at 5 3 and 6 3 kbit s www itu int archived from the original on 2021 06 13 retrieved 2021 06 13 ct8022 voip von g 723 1 g729ab truespeech co processor pdf archived from the original pdf on 4 april 2018 retrieved 4 april 2018 the ct8022 has built in truespeech 8 5 compatible with microsoft sound system 2 0 and a standard part of microsoft windows 95 and truespeech g 723 1 for h 323 and h 324 the ct8022 provides two additional non itu truespeech data rates at 4 8 and 4 1 kbps siprolab telecom patent pool creation and management for standardized telecommunication technologies 2017 12 22 archived from the original on 2017 12 22 retrieved 2018 01 10 voiceage corporation 2007 10 14 g 723 1 licensing archived from the original on 2007 10 14 retrieved 2009 09 17 sipro lab telecom 2007 10 25 faq g 729 and g 723 1 archived from the original on 2007 10 25 retrieved 2009 09 17 sipro lab telecom 2006 10 29 g 723 1 the highest itu t compression ratio archived from the original on 2006 10 29 retrieved 2009 09 17 sipro lab telecom 2006 10 29 g 723 1 members archived from the original on 2006 10 29 retrieved 2009 09 17 external links edit itu t recommendation g 723 1 technical specification intellectual property rights page on itu website with link to patent declaration database v t e multimedia compression and container formats video compression iso iec mpeg dv mjpeg motion jpeg 2000 mpeg 1 mpeg 2 part 2 mpeg 4 part 2 asp part 10 avc part 33 ivc mpeg h part 2 hevc mpeg i part 3 vvc mpeg 5 part 1 evc part 2 lcevc itu t vceg h 120 h 261 h 262 h 263 h 264 avc h 265 hevc h 266 vvc h 267 enhanced compression model smpte vc 1 vc 2 vc 3 vc 5 vc 6 truemotion and aomedia truemotion s vp3 vp6 vp7 vp8 vp9 av1 av2 chinese standard avs1 p2 avs gb t 20090 2 16 avs2 p2 gb t 33475 2 gy t 299 1 hdr vivid gy t 358 avs3 p2 gy t 368 others apple video avs bink cinepak daala dvi ffv1 huffyuv indeo lagarith microsoft video 1 msu lossless oms video pixlet prores 422 4444 quicktime animation graphics realvideo rtvideo sheervideo smacker sorenson video spark theora thor ut wmv xeb yuls audio compression iso iec mpeg mpeg 1 layer ii multichannel mpeg 1 layer i mpeg 1 layer iii mp3 aac he aac aac ld mpeg surround mpeg 4 als mpeg 4 sls mpeg 4 dst mpeg 4 hvxc mpeg 4 celp mpeg d usac mpeg h 3d audio itu t g 711 a law µ law g 718 g 719 g 722 g 722 1 g 722 2 g 723 g 723 1 g 726 g 728 g 729 g 729 1 ietf opus ilbc speex vorbis flac 3gpp amr amr wb amr wb evrc evrc b evs gsm hr gsm fr gsm efr etsi ac 3 ac 4 dts bluetooth sig sbc lc3 chinese standard avs1 p10 gb t 20090 10 avs2 p3 gb t 33475 3 audio vivid gy t 363 dra gb t 22726 exac sj t 11299 4 others acelp alac asao atrac celt codec 2 isac lyra melp monkey s audio mt9 musepack optimfrog osq qcelp rcelp realaudio sd2 shn silk siren smv svopc tta true audio twinvq vmr wb vselp wavpack wma mqa aptx aptx hd aptx low latency aptx adaptive ldac lhdc llac truehd image compression iec iso ietf w3c itu t jpeg ccitt group 4 gif heic heif hevc jbig jbig2 jpeg jpeg 2000 jpeg ls jpeg xl jpeg xr jpeg xs jpeg xt png apng tiff tiff ep tiff it others av1 avif bpg djvu exr flif icer mng pgf qoi qtvr wbmp webp containers iso iec mpeg es mpeg pes mpeg ps mpeg ts iso iec base media file format mpeg 4 part 14 mp4 motion jpeg 2000 mpeg 21 part 9 mpeg media transport itu t h 222 0 t 802 ietf rtp ogg matroska smpte gxf mxf others 3gp and 3g2 amv asf aiff avi au bpg bink smacker bmp divx media format evo flash video heif iff m2ts matroska webm quicktime file format ratdvd realmedia riff wav mod and tod vob ifo and bup collaborations netvc mpeg la alliance for open media methods entropy arithmetic huffman modified lpc acelp celp lsp wlpc lossless lossy lz deflate lzw pcm a law µ law adpcm dpcm transforms dct fft mdct wavelet daubechies dwt lists comparison of audio coding formats comparison of video codecs list of codecs see compression methods for techniques and compression software for codecs authority control databases national united states israel retrieved from https en wikipedia org w index php title g 723 1 oldid 1374256774 categories audio codecs speech codecs itu t recommendations itu t g series recommendations hidden categories articles with short description short description matches wikidata this page was last edited on 10 september 2026 at 21 27 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety 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