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extended adaptive multi rate wideband 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 software support 2 licensing and patent issues 3 see also 4 references 5 external links toggle the table of contents extended adaptive multi rate wideband 2 languages 日本語 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 audio codec extended adaptive multi rate wideband amr wb internet media type audio amr wb audio 3gpp type of format audio contained by 3gp extended from amr wb extended adaptive multi rate wideband amr wb is an audio codec that extends amr wb it adds support for stereo signals and higher sampling rates another main improvement is the use of transform coding transform coded excitation tcx additionally to acelp this greatly improves the generic audio coding automatic switching between transform coding and acelp provides both good speech and audio quality with moderate bit rates as amr wb operates at internal sampling rate 12 8 khz amr wb also supports various internal sampling frequencies ranges from 12 8 khz to 38 4 khz amr wb uses 16 khz sampling frequency with a resolution of 14 bits left justified in a 16 bit word amr wb uses 16 24 32 48 khz sampling frequencies with a resolution of 16 bits in a 16 bit word 1 3gpp originally developed the amr wb audio codec for streaming and messaging services in global system for mobile communications gsm and third generation 3g cellular systems its primary target applications are packet switched streaming service pss multimedia messaging service mms and multimedia broadcast and multicast service mbms file storage of amr wb encoded audio is specified within the 3gp container format 3gpp defined iso based multimedia file format defined in 3gpp ts 26 244 2 the amr wb codec has a wide bit rate range from 5 2 to 48 kbit s mono rates are scalable from 5 2 to 36 kbit s and stereo rates are scalable from 6 2 to 48 kbit s reproducing bandwidth up to 20 khz approaching cd quality moreover it provides backward compatibility with amr wideband software support edit in september 2005 voiceage corporation announced availability of amr wb decoder in helix dna client 3 4 licensing and patent issues edit amr wb compression incorporate several patents of nokia corporation telefonaktiebolaget l m ericsson and voiceage corporation 5 voiceage corporation is the license administrator for the amr and amr wb patent pools voiceage also accepts submission of patents for determination of their possible essentiality to these standards 6 the initial fee for applications using real time channels with amr wb is 6 500 minimum annual royalty shall be 10 000 excluding the initial fee in year 1 of the license agreement 5 amr wb monaural decoder in a category of personal computer products is licensed for free stereo amr wb decoder for personal computer products is licensed for 0 30 5 see also edit adaptive multi rate amr adaptive multi rate wideband amr wb 3gp comparison of audio coding formats rtp audio video profile references edit 3gpp ts 26 290 audio codec processing functions extended adaptive multi rate wideband amr wb codec transcoding functions page 10 retrieved on 2009 07 08 media type registration 7 1 rtp payload format for the extended adaptive multi rate wideband amr wb audio codec ietf p 31 sec 7 1 doi 10 17487 rfc4352 rfc 4352 state of the art amr wb hi fi audio compression is now available for helix sys con 2005 09 28 retrieved 2009 09 11 amr wb audio codec being integrated into helix helix community mailinglist 2005 09 28 retrieved 2009 09 11 1 2 3 voiceage corporation 2007 10 14 amr wb licensing terms voiceage corporation archived from the original on 2007 10 14 retrieved 2009 09 12 voiceage corporation licensing patent calls voiceage corporation archived from the original on 2007 10 14 retrieved 2009 09 12 external links edit 3gpp codecs specifications 3g and beyond gsm 26 series 3gpp ts 26 290 audio codec processing functions extended adaptive multi rate wideband amr wb codec transcoding functions rfc 4352 rtp payload format for the extended adaptive multi rate wideband amr wb audio codec rfc 4281 the codecs parameter for bucket media types 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 v t e analog and digital audio broadcasting terrestrial radio modulation am fm cofdm frequency allocations lw lf mw mf sw hf vhf low mid high l band uhf digital systems cam d dab dab drm drm isdb tsb fmextra hd radio cdr dvb t2 lite satellite frequency allocations c band k u band l band s band digital systems adr dab s dvb sh s dmb sdr commercial radio providers siriusxm canada codecs aac amr wb hdc he aac mpeg 1 audio layer ii dra subcarrier signals amss directband pad rds rbds sca scmo darc related topics technical audio audio data compression audio signal processing technical am stereo formats belar c quam harris kahn hazeltine magnavox technical emission am broadcasting am expanded band cable radio digital radio error detection and correction fm broadcast band fm broadcasting fm extended band in brazil multipath propagation shortwave relay station cultural history of radio international broadcasting radio portal comparison of radio systems retrieved from https en wikipedia org w index php title extended_adaptive_multi rate_ _wideband oldid 1283739699 categories audio codecs speech codecs hidden categories articles with short description short description is different from wikidata this page was last edited on 3 april 2025 at 10 31 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 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