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enhanced full rate 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 technology 2 licensing and patent issues 3 see also 4 references 5 external links toggle the table of contents enhanced full rate 7 languages français 日本語 latviešu nederlands русский українська 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 speech coding standard enhanced full rate or efr or gsm efr or gsm 06 60 is a speech coding standard that was developed in order to improve the quality of gsm enhanced full rate was developed by nokia and the université de sherbrooke canada in 1995 etsi selected the enhanced full rate voice codec as the industry standard codec for gsm dcs 1 technology edit the sampling rate is 8000 sample s leading to a bit rate for the encoded bit stream of 12 2 kbit s the coding scheme is the so called algebraic code excited linear prediction coder acelp the encoder is fed with data consisting of samples with a resolution of 13 bits left justified in a 16 bit word the three least significant bits are set to 0 the decoder outputs data in the same format 2 the enhanced full rate gsm 06 60 technical specification describes the detailed mapping between input blocks of 160 speech samples in 13 bit uniform pcm format to encoded blocks of 244 bits and from encoded blocks of 244 bits to output blocks of 160 reconstructed speech samples it also specifies the conversion between a law or μ law pcs 1900 8 bit pcm and 13 bit uniform pcm this part of specification also describes the codec down to the bit level thus enabling the verification of compliance to the part to a high degree of confidence by use of a set of digital test sequences these test sequences are described in gsm 06 54 and are available on disks 2 this standard is defined in etsi ets 300 726 gsm 06 60 the packing is specified in etsi technical specification ts 101 318 3 etsi has selected the enhanced full rate voice codec as the industry standard codec for gsm dcs in 1995 enhanced full rate was also chosen as the industry standard in us market for pcs 1900 gsm frequency band 1 4 licensing and patent issues edit the enhanced full rate incorporate several patents it uses the patented acelp technology which is licensed by the voiceage corporation 5 6 7 8 enhanced full rate was developed by nokia and the université de sherbrooke canada 1 see also edit half rate full rate adaptive multi rate amr adaptive multi rate wideband amr wb extended adaptive multi rate wideband amr wb comparison of audio coding formats references edit 1 2 3 nokia 1995 11 04 nokia sets industry standard with new voice codec archived from the original on 1996 12 20 retrieved 2009 09 20 1 2 etsi en 300 726 v 8 0 1 2000 11 gsm 06 60 version 8 0 1 release 1999 retrieved on 2009 07 08 rfc 3551 gsm efr gsm 06 60 retrieved on 2009 07 08 jutta degener 1995 half rate gsm and efr retrieved 2009 09 20 voiceage corporation 2007 10 14 licensing efr gsm archived from the original on 2007 10 14 retrieved 2009 09 20 voiceage corporation licensing efr gsm voiceage corporation retrieved 2009 09 20 voiceage corporation 2007 10 13 codec technologies archived from the original on 2007 10 13 retrieved 2009 09 20 voiceage corporation codec technologies voiceage corporation retrieved 2009 09 20 external links edit rfc 3551 gsm efr gsm 06 60 ets 300 726 gsm 06 60 3gpp ts06 60 technical specification summary of gsm codecs 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 retrieved from https en wikipedia org w index php title enhanced_full_rate oldid 1220784863 categories audio codecs speech codecs hidden categories articles with short description short description matches wikidata this page was last edited on 25 april 2024 at 21 58 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