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116:(LPC). The bit rate of the codec is 13 kbit/s, or 1.625 bits/audio sample (often padded out to 33 bytes/20 ms or 13.2 kbit/s). The quality of the coded speech is quite poor by modern standards, but at the time of development (early 1990s) it was a good compromise between computational complexity and quality, requiring only on the order of a million additions and multiplications per second. The codec is still widely used in networks around the world. Gradually FR will be replaced by 23: 193:
The codec operates on 160 sample frames that span 20 ms, so this is the minimum transcoder delay possible even with infinitely fast CPUs and zero network latency. The operational requirement is that the transcoder delay should be less than 30 ms. The transcoder delay is defined as the time interval
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between the instant a speech frame of 160 samples has been received at the encoder input and the instant the corresponding 160 reconstructed speech samples have been out-put by the speech decoder at an 8 kHz sample rate.
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with a lookup table. In GSM, the encoded speech is passed to the channel encoder specified in GSM 05.03. In the receive direction, the inverse operations take place.
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is used in the synthesis filter. However, unlike most modern speech codecs, the order of the linear prediction is only 8. In modern
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codec can encode and decode GSM Full Rate audio. "libgsm" was developed 1992–1994 by
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ETSI EN 300 961 V8.1.1 (2000-11) - (GSM 06.10 version 8.1.1 Release 1999)
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libgsm - README - GSM 06.10 13 kbit/s RPE/LTP speech compression
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The GSM 06.10 lossy speech compression library and its applications
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at an 8 kHz sample rate. This can be direct from an
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See 14: 365:Plug-in Winamp for raw GSM 06.10 59: 40: 1806:ISO/IEC base media file format 387:, Winamp, Retrieved 2009-10-09 228:The GSM 06.10 is also used in 218:to provide GSM audio support. 1: 212:Technische Universität Berlin 210:and Carsten Bormann, then at 279:Adaptive Multi-Rate Wideband 172:analog-to-digital converter 2311: 2249:Comparison of video codecs 759:(GB/T 33475.2,GY/T 299.1) 2262: 421:- Technical Specification 413:ETS 300 580-2 (GSM 06.10) 376:Cedric Hans (2004-06-08) 317:, Retrieved on 2009-07-08 232:software, for example in 149:linear predictive coding 141:Regular Pulse Excitation 114:linear predictive coding 104:) was the first digital 31:Audio quality comparison 2073:Alliance for Open Media 415:- legacy specifications 407:ETS 300 961 (GSM 06.10) 296:RTP audio video profile 993:MPEG-1 Layer III (MP3) 367:, Retrieved 2009-10-09 354:, Retrieved 2009-09-20 342:, Retrieved 2009-08-31 329:, Retrieved 2009-08-31 26: 16:Speech coding standard 2011:QuickTime File Format 151:(LPC) speech codecs, 108:standard used in the 25: 2270:Compression software 1827:MPEG media transport 904:Sorenson Video/Spark 145:Long Term Prediction 100:or sometimes simply 2268:for techniques and 2266:Compression methods 762:HDR Vivid(GY/T 358) 409:- European Standard 273:Adaptive Multi-Rate 122:Adaptive Multi-Rate 383:2009-09-08 at the 267:Enhanced Full Rate 118:Enhanced Full Rate 27: 2277: 2276: 2051: 2050: 1969:DivX Media Format 1757: 1756: 1542: 1541: 942: 941: 832:Microsoft Video 1 767:AVS3 P2(GY/T 368) 753:(GB/T 20090.2/16) 153:linear prediction 66: 46: 2302: 2043:VOB, IFO and BUP 1817:Motion JPEG 2000 1768: 1555: 1514:aptX Low Latency 1291:Chinese Standard 955: 744:Chinese Standard 516:Motion JPEG 2000 485: 455: 448: 441: 432: 388: 374: 368: 361: 355: 349: 343: 336: 330: 324: 318: 312: 221:There is also a 178:8-bit nonlinear 135:is specified in 68: 67: 48: 47: 24: 2310: 2309: 2305: 2304: 2303: 2301: 2300: 2299: 2280: 2279: 2278: 2273: 2258: 2232: 2077: 2047: 1905: 1882: 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55:Original file 37: 2290:Audio codecs 1320:(GB/T 22726) 1225: 981:Multichannel 837:MSU Lossless 751:AVS1 P2/AVS+ 705:TrueMotion S 643:H.265 / HEVC 589:Part 1 / EVC 577:Part 3 / VVC 543:Part 2 / ASP 419:3GPP TS06.10 372: 363:Cedric Hans 359: 347: 334: 322: 310: 252:and others. 227: 220: 203: 201: 192: 165: 132: 131: 101: 97: 93: 89: 85: 84: 2038:MOD and TOD 1979:Flash Video 1917:3GP and 3G2 1598:HEIC / HEIF 1550:compression 1310:Audio Vivid 1045:MPEG-D USAC 1040:MPEG-4 CELP 1035:MPEG-4 HVXC 950:compression 782:Apple Video 698:and AOMedia 648:H.266 / VVC 638:H.264 / AVC 480:compression 465:compression 338:Ubuntu.com 2284:Categories 2272:for codecs 2219:Daubechies 2194:Transforms 2096:Arithmetic 1763:Containers 1468:True Audio 1312:(GY/T 363) 1030:MPEG-4 DST 1025:MPEG-4 SLS 1020:MPEG-4 ALS 894:SheerVideo 868:QuickTime 696:TrueMotion 462:Multimedia 302:References 157:narrowband 128:Technology 120:(EFR) and 98:GSM 06.10 78:media help 2021:RealMedia 1623:JPEG 2000 1426:RealAudio 1406:OptimFROG 884:RealVideo 872:Animation 842:OMS Video 469:container 287:(AMR-WB+) 262:Half Rate 202:The free 86:Full Rate 36:Full Rate 2140:Lossless 2106:Modified 1999:Matroska 1878:Matroska 1789:MPEG-PES 1401:Musepack 1298:AVS1 P10 877:Graphics 827:Lagarith 427:homepage 401:RFC 3551 381:Archived 281:(AMR-WB) 256:See also 250:Ventrilo 242:Linphone 161:wideband 2214:Wavelet 2155:DEFLATE 2101:Huffman 2091:Entropy 2083:Methods 2068:MPEG LA 1957:Smacker 1845:H.222.0 1801:MPEG-TS 1796:MPEG-PS 1784:MPEG-ES 1668:TIFF/IT 1663:TIFF/EP 1648:JPEG XT 1643:JPEG XS 1638:JPEG XR 1633:JPEG XL 1628:JPEG-LS 1509:aptX HD 1489:WavPack 1431:RTAudio 1371:Codec 2 1304:AVS2 P3 1231:GSM-EFR 1201:AMR-WB+ 1135:G.729.1 1115:G.723.1 1105:G.722.2 1100:G.722.1 899:Smacker 889:RTVideo 817:Huffyuv 797:Cinepak 757:AVS2 P2 471:formats 238:QuteCom 2016:RatDVD 1910:Others 1677:Others 1479:VMR-WB 1474:TwinVQ 1339:Others 1226:GSM-FR 1221:GSM-HR 1211:EVRC-B 1196:AMR-WB 1168:Vorbis 1008:AAC-LD 1003:HE-AAC 909:Theora 852:ProRes 847:Pixlet 775:Others 584:MPEG-5 572:MPEG-I 560:MPEG-H 538:MPEG-4 531:Part 2 526:MPEG-2 521:MPEG-1 425:Libgsm 223:Winamp 204:libgsm 133:GSM-FR 94:GSM-FR 2237:Lists 2182:ADPCM 2177:µ-law 2172:A-law 2145:Lossy 2118:ACELP 2063:NETVC 1888:SMPTE 1850:T.802 1837:ITU-T 1813:(MP4) 1613:JBIG2 1576:ITU-T 1548:Image 1484:VSELP 1461:SVOPC 1451:Siren 1421:RCELP 1416:QCELP 1361:ATRAC 1346:ACELP 1163:Speex 1130:G.729 1125:G.728 1120:G.726 1110:G.723 1095:G.722 1090:G.719 1085:G.718 1078:µ-law 1073:A-law 1068:G.711 1060:ITU-T 948:Audio 822:Indeo 802:Daala 658:SMPTE 633:H.263 628:H.262 623:H.261 618:H.120 606:ITU-T 511:MJPEG 478:Video 275:(AMR) 269:(EFR) 234:Ekiga 184:μ-law 180:A-law 176:G.711 2264:See 2209:MDCT 2187:DPCM 2133:WLPC 2123:CELP 2026:RIFF 2004:WebM 1994:M2TS 1984:HEIF 1952:Bink 1932:AIFF 1860:IETF 1749:WebP 1744:WBMP 1739:QTVR 1719:ICER 1714:FLIF 1704:DjVu 1694:AVIF 1684:APNG 1658:TIFF 1618:JPEG 1608:JBIG 1603:HEVC 1580:JPEG 1567:IETF 1534:LLAC 1529:LHDC 1524:LDAC 1504:aptX 1465:TTA 1446:SILK 1386:MELP 1381:Lyra 1376:iSAC 1366:CELT 1356:Asao 1351:ALAC 1329:ExAC 1324:L2HC 1254:AC-4 1249:AC-3 1241:ETSI 1206:EVRC 1183:3GPP 1173:FLAC 1158:iLBC 1153:Opus 1145:IETF 968:MPEG 934:YULS 914:Thor 862:4444 812:FFV1 792:Bink 686:VC-6 681:VC-5 676:VC-3 671:VC-2 666:VC-1 610:VCEG 498:MPEG 467:and 230:VoIP 216:Wine 188:PSTN 137:ETSI 2224:DWT 2204:FFT 2199:DCT 2167:PCM 2160:LZW 2128:LSP 2113:LPC 2031:WAV 1989:IFF 1974:EVO 1964:BMP 1947:BPG 1937:AVI 1927:ASF 1922:AMV 1901:MXF 1896:GXF 1873:Ogg 1868:RTP 1776:IEC 1772:ISO 1734:QOI 1729:PGF 1724:MNG 1709:EXR 1699:BPG 1689:AV1 1653:PNG 1593:GIF 1572:W3C 1563:ISO 1559:IEC 1499:MQA 1494:WMA 1456:SMV 1441:SHN 1436:SD2 1411:OSQ 1396:MT9 1318:DRA 1282:LC3 1277:SBC 1259:DTS 1216:EVS 1191:AMR 998:AAC 963:IEC 959:ISO 929:XEB 924:WMV 857:422 807:DVI 787:AVS 735:AV1 730:VP9 725:VP8 720:VP7 715:VP6 710:VP3 493:IEC 489:ISO 182:or 168:PCM 110:GSM 102:GSM 96:or 92:or 2286:: 2150:LZ 1942:AU 1774:, 1578:, 1574:, 1569:, 1565:, 1561:, 961:, 919:Ut 608:, 506:DV 495:, 491:, 248:, 244:, 240:, 236:, 143:- 90:FR 965:, 454:e 447:t 440:v 88:( 80:.

Index

Full Rate
Original file
media help
speech coding
GSM
linear predictive coding
Enhanced Full Rate
Adaptive Multi-Rate
ETSI
Regular Pulse Excitation
Long Term Prediction
linear predictive coding
linear prediction
narrowband
wideband
PCM
analog-to-digital converter
G.711
A-law
ÎĽ-law
PSTN
Jutta Degener
Technische Universität Berlin
Wine
Winamp
VoIP
Ekiga
QuteCom
Linphone
Asterisk (PBX)

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.

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