540:
The initial fee for professional content creation tools and "real-time channel" products is US$ 6,500. The minimum annual royalty is $ 10,000, which, in the first year, excludes the initial fee. Per-channel license fees fall from $ 0.99 to $ 0.50 with volume, up to a maximum of $ 2 million annually.
544:
In the category of personal computer products, e.g., media players, the AMR decoder is licensed for free. The license fee for a sold encoder falls from $ 0.40 to $ 0.30 with volume, up to a maximum of $ 300,000 annually. The minimum annual royalty is not applied to licensed products that fall under
256:
is increased. This improves the quality and robustness of the network connection while sacrificing some voice clarity. In the particular case of AMR this improvement is somewhere around S/N = 4–6 dB for usable communication. The new intelligent system allows the network operator to prioritize
445:
Algorithmic delay is 20 ms per frame. For bit-rates of 12.2, there is no "algorithm" look-ahead delay. For other rates, look-ahead delay is 5 ms. Note that there is 5 ms "dummy" look-ahead delay, to allow seamless frame-wise mode switching with the rest of
605: – amrnb and amrwb libraries development site. These libraries are based on the reference implementation and were created to prevent embedding of possibly patented source code into many open source projects.
217:. There also exists another storage format for AMR that is suitable for applications with more advanced demands on the storage format, like random access or synchronization with video. This format is the 3GPP-specified
427:
Generates frame length of 95, 103, 118, 134, 148, 159, 204, or 244 bits for AMR FR bit rates 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, or 12.2 kbit/s, respectively. AMR HR frame lengths are different.
1051:
625:
248:. The usage of AMR requires optimized link adaptation that selects the best codec mode to meet the local radio channel and capacity requirements. If the radio conditions are bad,
628:
can convert (create) samples, one can use Nokia's conversion tool to create both .amr and .awb files. It works in
Windows 7 as well if the setup is run in XP compatibility mode.
2574:
1344:
201:
AMR is also a file format for storing spoken audio using the AMR codec. Many modern mobile telephone handsets can store short audio recordings in the AMR format, and both
175:
that encodes narrowband (200–3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s.
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730:
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1107: – RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs
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2032:
463:
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2102:
1089:
3GPP TS 26.090 – Mandatory Speech Codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Transcoding functions
2107:
209:) to convert between this and other formats, although AMR is a speech format and is unlikely to give ideal results for other audio. The common
888:
RFC 4867 - RTP Payload Format and File
Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs
862:
RFC 4867 - RTP Payload Format and File
Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs
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795:"3GPP TS 26.090 - Mandatory Speech Codec speech processing functions; Adaptive Multi-Rate (AMR) speech codec; Transcoding functions"
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3GPP TS 26.071 – Mandatory Speech Codec speech processing functions; AMR Speech Codec; General
Description
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The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s.
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537:. VoiceAge also accepts submission of patents for determination of their possible essentiality to these standards.
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816:"3GPP TS 26.071 - Mandatory speech CODEC speech processing functions; AMR speech Codec; General description"
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3GPP TS 26.073 – AMR speech Codec (C source code) – reference implementation
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Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to 200–3400 Hz.
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455:(LPC) is used to synthesize the speech from a residual waveform. The LPC parameters are encoded as
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The frames contain 160 samples and are 20 milliseconds long. AMR uses various techniques, such as
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AMR is a hybrid speech coder, and as such transmits both speech parameters and a waveform signal
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571:— legal notices for usage of amrnb and amrwb libraries based on the reference implementation
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587:(beta version 1.3) via the FFmpeg integration libraries (both input and output format)
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is freeware to play AMR audio files, and can convert AMR from/to MP3/WAV audio format.
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The complexity of the algorithm is rated at 5, using a relative scale where
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the category of personal computer products and use only the free decoder.
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to select from one of eight different bit rates based on link conditions.
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There are a total of 14 modes of the AMR codec, eight are available in a
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1114: – The Codecs Parameter for "Bucket" Media Types
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version 1.1.0 and later (input format only, not output format)
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3GPP codecs specifications; 3G and beyond / GSM, 26 series
500:
of 3.79 for AMR (12.2 kbit/s), compared to 4.13 for
489:
of 4.14 for AMR (12.2 kbit/s), compared to 4.45 for
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929:
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smartphones (used for voice recorder file format, while
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442:(CNG) to reduce bandwidth usage during silence periods
27:
Audio compression format optimized for speech coding
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FFmpeg
General Documentation - AMR external library
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59:
47:
35:
608:Open source software to convert the .amr format:
564:The 3G Patent Platform and its licensing policy
704:Media Player Classic Home Cinema, around 1.7.1
639:
1133:
555:, including pricing to license the AMR codecs
8:
789:
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30:
1067:KMPlayer Internal Audio Decoder Preferences
645:Parole Media Player 0.8.1 (in Ubuntu 16.04)
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1140:
1126:
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616:, both are in an early developmental stage
186:in October 1999 and is now widely used in
496:PSQM testing under network stress yields
875:"Sorting Through GSM Codecs: A Tutorial"
464:algebraic code-excited linear prediction
270:
783:
731:Extended Adaptive Multi-Rate – Wideband
356:ARIB 6.7 kbit/s enhanced full rate
178:AMR was adopted as the standard speech
966:. VoiceAge Corporation. Archived from
940:. VoiceAge Corporation. Archived from
909:. VoiceAge Corporation. Archived from
485:testing under ideal conditions yields
340:TIA/EIA IS-641 TDMA enhanced full rate
257:capacity or quality per base station.
29:
529:and VoiceAge, the last one being the
462:The residual waveform is coded using
224:based on ISO base media file format.
206:
7:
205:and proprietary programs exist (see
988:VoiceAge Corporation (2007-10-14).
905:VoiceAge Corporation (2007-10-14).
2931:Comparison of audio coding formats
936:VoiceAge Corporation (June 2007).
768:Comparison of audio coding formats
54:audio/amr, audio/3gpp, audio/3gpp2
25:
1015:3GPP TS 26.073 - AMR speech Codec
651:Player and multimedia framework
626:Nokia Multimedia Converter 2.0
513:AMR codecs incorporate several
2493:ISO/IEC base media file format
603:AMR Codecs as Shared Libraries
569:AMR Codecs as Shared Libraries
553:VoiceAge licensing information
1:
837:"What's toll-quality voice?"
725:Adaptive Multi-Rate Wideband
1050:, Retrieved on 2009-07-08
593:with OpenCORE AMR libraries
509:Licensing and patent issues
298:ETSI GSM enhanced full rate
2998:
2936:Comparison of video codecs
1446:(GB/T 33475.2,GY/T 299.1)
1054:February 18, 2009, at the
990:"Licensing - Patent Calls"
964:"Licensing - Patent Calls"
432:discontinuous transmission
2949:
1038:, Retrieved on 2009-07-08
675:(can play back AMR files)
31:Adaptive Multi-Rate (AMR)
599:Used for voice recorder.
453:Linear predictive coding
440:comfort noise generation
436:voice activity detection
161:audio compression format
49:Internet media type
2760:Alliance for Open Media
1026:Retrieved on 2010-02-28
773:RTP audio video profile
695:cannot play AMR format)
1680:MPEG-1 Layer III (MP3)
1076:, Retrieved 2014-10-22
1017:, Retrieved 2009-09-08
962:VoiceAge Corporation.
266:half rate channel (HR)
262:full rate channel (FR)
167:. AMR is a multi-rate
63:23 June 1999
2698:QuickTime File Format
938:"AMR Licensing Terms"
907:"AMR Licensing Terms"
531:License Administrator
85:; 7 years ago
2957:Compression software
2514:MPEG media transport
1591:Sorenson Video/Spark
657:version 11 and later
2955:for techniques and
2953:Compression methods
1449:HDR Vivid(GY/T 358)
711:with the component
498:mean opinion scores
487:mean opinion scores
457:line spectral pairs
141:Adaptive Multi-Rate
32:
1072:2014-10-22 at the
1048:Android AMR codecs
1013:3GPP (2008-12-11)
843:. 13 December 2000
747:Enhanced Full Rate
548:More information:
211:filename extension
83:17 March 2017
37:Filename extension
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2656:DivX Media Format
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1519:Microsoft Video 1
1454:AVS3 P2(GY/T 368)
1440:(GB/T 20090.2/16)
699:K-Lite Codec Pack
559:3GPP legal issues
413:
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137:
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16:(Redirected from
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2730:VOB, IFO and BUP
2504:Motion JPEG 2000
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2201:aptX Low Latency
1978:Chinese Standard
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1431:Chinese Standard
1203:Motion JPEG 2000
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992:. Archived from
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661:VLC media player
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576:Software support
283:Compatible with
277:Bitrate (kbit/s)
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222:container format
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207:Software support
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1993:(GB/T 33475.3)
1987:(GB/T 20090.10)
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1056:Wayback Machine
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877:. 11 July 2003.
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2941:List of codecs
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1252:Part 2 / HEVC
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996:on 2007-10-14
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264:and six on a
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250:source coding
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165:speech coding
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34:
19:
2007:(GB/T 22726)
1877:
1668:Multichannel
1524:MSU Lossless
1438:AVS1 P2/AVS+
1392:TrueMotion S
1330:H.265 / HEVC
1276:Part 1 / EVC
1264:Part 3 / VVC
1230:Part 2 / ASP
1062:
1043:
1031:
1022:
1009:
998:. Retrieved
994:the original
983:
972:. Retrieved
968:the original
957:
946:. Retrieved
942:the original
915:. Retrieved
911:the original
883:
869:
857:
845:. Retrieved
840:
831:
820:. Retrieved
810:
799:. Retrieved
547:
543:
539:
535:patent pools
533:for the AMR
530:
512:
434:(DTX), with
259:
231:
200:
177:
156:
152:
148:
144:
140:
138:
2725:MOD and TOD
2666:Flash Video
2604:3GP and 3G2
2285:HEIC / HEIF
2237:compression
1997:Audio Vivid
1732:MPEG-D USAC
1727:MPEG-4 CELP
1722:MPEG-4 HVXC
1637:compression
1469:Apple Video
1385:and AOMedia
1335:H.266 / VVC
1325:H.264 / AVC
1167:compression
1152:compression
157:audio codec
127:Free format
114:Open format
2971:Categories
2959:for codecs
2906:Daubechies
2881:Transforms
2783:Arithmetic
2450:Containers
2155:True Audio
1999:(GY/T 363)
1717:MPEG-4 DST
1712:MPEG-4 SLS
1707:MPEG-4 ALS
1581:SheerVideo
1555:QuickTime
1383:TrueMotion
1149:Multimedia
1000:2009-09-12
974:2009-09-12
948:2009-09-12
917:2009-09-12
822:2010-07-21
801:2010-07-21
779:References
709:foobar2000
689:BlackBerry
685:(iMessage)
655:RealPlayer
620:AMR Player
438:(VAD) and
194:. It uses
169:narrowband
90:2017-03-17
67:1999-06-23
42:.amr, .3ga
2708:RealMedia
2310:JPEG 2000
2113:RealAudio
2093:OptimFROG
1571:RealVideo
1559:Animation
1529:OMS Video
1156:container
1110:RFC
1103:RFC
742:Full Rate
737:Half Rate
733:(AMR-WB+)
649:QuickTime
610:RetroCode
475:is 1 and
304:AMR_10.20
288:AMR_12.20
2827:Lossless
2793:Modified
2686:Matroska
2565:Matroska
2476:MPEG-PES
2088:Musepack
1985:AVS1 P10
1564:Graphics
1514:Lagarith
1070:Archived
1052:Archived
727:(AMR-WB)
719:See also
640:KMPlayer
636:SMPlayer
585:Audacity
523:Ericsson
466:(ACELP).
416:Features
388:AMR_4.75
375:AMR_5.15
362:AMR_5.90
346:AMR_6.70
330:AMR_7.40
317:AMR_7.95
2901:Wavelet
2842:DEFLATE
2788:Huffman
2778:Entropy
2770:Methods
2755:MPEG LA
2644:Smacker
2532:H.222.0
2488:MPEG-TS
2483:MPEG-PS
2471:MPEG-ES
2355:TIFF/IT
2350:TIFF/EP
2335:JPEG XT
2330:JPEG XS
2325:JPEG XR
2320:JPEG XL
2315:JPEG-LS
2196:aptX HD
2176:WavPack
2118:RTAudio
2058:Codec 2
1991:AVS2 P3
1918:GSM-EFR
1888:AMR-WB+
1822:G.729.1
1802:G.723.1
1792:G.722.2
1787:G.722.1
1586:Smacker
1576:RTVideo
1504:Huffyuv
1484:Cinepak
1444:AVS2 P2
1158:formats
890:Page 35
864:Page 35
847:26 July
841:ITworld
667:ffdshow
632:MPlayer
614:Amr2Wav
597:Android
515:patents
504:(μ-law)
493:(μ-law)
401:AMR_SID
280:Channel
171:speech
153:GSM-AMR
88: (
65: (
2703:RatDVD
2597:Others
2364:Others
2166:VMR-WB
2161:TwinVQ
2026:Others
1913:GSM-FR
1908:GSM-HR
1898:EVRC-B
1883:AMR-WB
1855:Vorbis
1695:AAC-LD
1690:HE-AAC
1596:Theora
1539:ProRes
1534:Pixlet
1462:Others
1271:MPEG-5
1259:MPEG-I
1247:MPEG-H
1225:MPEG-4
1218:Part 2
1213:MPEG-2
1208:MPEG-1
818:. 3GPP
797:. 3GPP
758:IS-641
681:&
673:iPhone
671:Apple
591:FFmpeg
479:is 15.
477:G.729a
459:(LSP).
446:rates.
159:is an
149:AMR-NB
81:14.0.0
18:AMR-NB
2924:Lists
2869:ADPCM
2864:µ-law
2859:A-law
2832:Lossy
2805:ACELP
2750:NETVC
2575:SMPTE
2537:T.802
2524:ITU-T
2500:(MP4)
2300:JBIG2
2263:ITU-T
2235:Image
2171:VSELP
2148:SVOPC
2138:Siren
2108:RCELP
2103:QCELP
2048:ATRAC
2033:ACELP
1850:Speex
1817:G.729
1812:G.728
1807:G.726
1797:G.723
1782:G.722
1777:G.719
1772:G.718
1765:µ-law
1760:A-law
1755:G.711
1747:ITU-T
1635:Audio
1509:Indeo
1489:Daala
1345:SMPTE
1320:H.263
1315:H.262
1310:H.261
1305:H.120
1293:ITU-T
1198:MJPEG
1165:Video
749:(EFR)
683:macOS
519:Nokia
502:G.711
491:G.711
473:G.711
407:FR/HR
394:FR/HR
381:FR/HR
368:FR/HR
352:FR/HR
336:FR/HR
323:FR/HR
307:10.20
291:12.20
234:ACELP
228:Usage
180:codec
173:codec
106:audio
103:Lossy
2951:See
2896:MDCT
2874:DPCM
2820:WLPC
2810:CELP
2713:RIFF
2691:WebM
2681:M2TS
2671:HEIF
2639:Bink
2619:AIFF
2547:IETF
2436:WebP
2431:WBMP
2426:QTVR
2406:ICER
2401:FLIF
2391:DjVu
2381:AVIF
2371:APNG
2345:TIFF
2305:JPEG
2295:JBIG
2290:HEVC
2267:JPEG
2254:IETF
2221:LLAC
2216:LHDC
2211:LDAC
2191:aptX
2152:TTA
2133:SILK
2073:MELP
2068:Lyra
2063:iSAC
2053:CELT
2043:Asao
2038:ALAC
2016:ExAC
2011:L2HC
1941:AC-4
1936:AC-3
1928:ETSI
1893:EVRC
1870:3GPP
1860:FLAC
1845:iLBC
1840:Opus
1832:IETF
1655:MPEG
1621:YULS
1601:Thor
1549:4444
1499:FFV1
1479:Bink
1373:VC-6
1368:VC-5
1363:VC-3
1358:VC-2
1353:VC-1
1297:VCEG
1185:MPEG
1154:and
1112:4281
1105:4867
849:2019
483:PSQM
404:1.80
391:4.75
378:5.15
365:5.90
349:6.70
333:7.40
320:7.95
274:Mode
244:and
215:.amr
203:free
192:UMTS
190:and
184:3GPP
139:The
2911:DWT
2891:FFT
2886:DCT
2854:PCM
2847:LZW
2815:LSP
2800:LPC
2718:WAV
2676:IFF
2661:EVO
2651:BMP
2634:BPG
2624:AVI
2614:ASF
2609:AMV
2588:MXF
2583:GXF
2560:Ogg
2555:RTP
2463:IEC
2459:ISO
2421:QOI
2416:PGF
2411:MNG
2396:EXR
2386:BPG
2376:AV1
2340:PNG
2280:GIF
2259:W3C
2250:ISO
2246:IEC
2186:MQA
2181:WMA
2143:SMV
2128:SHN
2123:SD2
2098:OSQ
2083:MT9
2005:DRA
1969:LC3
1964:SBC
1946:DTS
1903:EVS
1878:AMR
1685:AAC
1650:IEC
1646:ISO
1616:XEB
1611:WMV
1544:422
1494:DVI
1474:AVS
1422:AV1
1417:VP9
1412:VP8
1407:VP7
1402:VP6
1397:VP3
1180:IEC
1176:ISO
763:3GP
679:iOS
527:NTT
517:of
246:CNG
242:VAD
238:DTX
219:3GP
213:is
188:GSM
182:by
151:or
145:AMR
120:Yes
2973::
2837:LZ
2629:AU
2461:,
2265:,
2261:,
2256:,
2252:,
2248:,
1648:,
1606:Ut
1295:,
1193:DV
1182:,
1178:,
926:^
895:^
839:.
786:^
638:,
612:,
525:,
521:,
310:FR
294:FR
268:.
240:,
236:,
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147:,
133:No
1652:,
1141:e
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1127:v
1003:.
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951:.
920:.
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825:.
804:.
642:)
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129:?
116:?
92:)
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