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The [[Real-time Transport Protocol]] (RTP) specifies a general-purpose data format and [[network protocol]] for transmitting digital media streams on [[Internet Protocol]] (IP) networks. The details of media encoding, such as signal sampling rate, frame size and timing, are specified in an '''RTP payload format'''. The format parameters of the RTP payload are typically communicated between transmission endpoints with the [[Session Description Protocol]] (SDP), but other protocols, such as the [[XMPP|Extensible Messaging and Presence Protocol]] (XMPP) may be used.
==
The technical parameters of payload formats for audio and video streams are standardised.
The standard also describes the process of registering new payload types with IANA
* {{Sum RFC|3550|ref=yes}}
* {{Sum RFC|3551|ref=yes}}
* {{Sum RFC|3611|ref=yes}}
* {{Sum RFC|4856|ref=yes}}
==Text messaging payload types==▼
Payload formats and types for text messaging are defined in the following specifications:
* {{Sum RFC|4103|ref=yes|notes=yes}}
* {{Sum RFC|9071|ref=yes}}
==MIDI payload types==▼
Payload formats and types for [[MIDI]] are defined in the following specifications:
*{{Sum RFC|6295|ref=yes}}
*{{Sum RFC|4696|ref=yes}}
==Audio and video payload types==
Payload formats and types for audio and video are defined in the following specifications:
* {{Sum RFC|2029|ref=yes}}
* {{Sum RFC|2190|ref=yes}}
* {{Sum RFC|2198|ref=yes}}
* {{Sum RFC|2250|ref=yes}}
* {{Sum RFC|2343|ref=yes}}
* {{Sum RFC|2435|ref=yes}}
* {{Sum RFC|2586|ref=yes}}
* {{Sum RFC|2658|ref=yes}}
* {{Sum RFC|3190|ref=yes}}
* {{Sum RFC|3389|ref=yes}}
* {{Sum RFC|3497|ref=yes}}
* {{Sum RFC|3640|ref=yes}}
* {{Sum RFC|3952|ref=yes}}
* {{Sum RFC|4175|ref=yes}}
* {{Sum RFC|4184|ref=yes}}
* {{Sum RFC|4352|ref=yes}}
* {{Sum RFC|4587|ref=yes}}
* {{Sum RFC|4598|ref=yes}}
* {{Sum RFC|4629|ref=yes}}
* {{Sum RFC|4733|ref=yes}}
* {{Sum RFC|4749|ref=yes}}
* {{Sum RFC|4788|ref=yes}}
* {{Sum RFC|4867|ref=yes}}
* {{Sum RFC|5188|ref=yes}}
* {{Sum RFC|5215|ref=yes}}
* {{Sum RFC|5371|ref=yes}}
* {{Sum RFC|5391|ref=yes}}
* {{Sum RFC|5404|ref=yes}}
* {{Sum RFC|5574|ref=yes}}
* {{Sum RFC|5577|ref=yes}}
* {{Sum RFC|5584|ref=yes}}
* {{Sum RFC|5686|ref=yes}}
* {{Sum RFC|5993|ref=yes}}
* {{Sum RFC|6184|ref=yes}}
* {{Sum RFC|6190|ref=yes}}
* {{Sum RFC|6416|ref=yes}}
* {{Sum RFC|6469|ref=yes}}
* {{Sum RFC|7310|ref=yes}}
* {{Sum RFC|7587|ref=yes}}
* {{Sum RFC|7741|ref=yes}}
* {{Sum RFC|7798|ref=yes}}
* {{Sum RFC|9134|ref=yes}}
* {{Sum RFC|9607|ref=yes}}
* {{Sum RFC|9628|ref=yes}}
Payload identifiers 96–127 are used for payloads defined dynamically during a session. It is recommended to dynamically assign port numbers, although port numbers 5004 and 5005 have been registered for use of the profile when a dynamically assigned port is not required.
Line 44 ⟶ 91:
|20
|ITU-T [[G.711]] PCM [[μ-Law]] audio 64 kbit/s
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|-
Line 55 ⟶ 102:
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|reserved, previously [[FS-1016]] [[CELP]] audio 4.8 kbit/s
|{{IETF RFC
|-
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|reserved, previously ITU-T [[G.721]] [[ADPCM]] audio 32 kbit/s or ITU-T [[G.726]] audio 32 kbit/s
|{{IETF RFC
|-
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|20
|European [[GSM-FR|GSM Full Rate]] audio 13 kbit/s (GSM 06.10)
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|-
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|30
|ITU-T [[G.723.1]] audio
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|-
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|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 32 kbit/s
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|-
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|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 64 kbit/s
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|-
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|20
|Experimental [[Linear predictive coding|Linear Predictive Coding]] audio 5.6 kbit/s
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|-
Line 132 ⟶ 179:
|20
|ITU-T G.711 PCM [[A-Law]] audio 64 kbit/s
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|-
Line 143 ⟶ 190:
|20
|ITU-T [[G.722]] audio 64 kbit/s
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|-
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|20
|[[Linear PCM]] 16-bit Stereo audio 1411.2 kbit/s,{{Ref RFC|2586}}{{Ref RFC|3108|rp=62}}{{Ref RFC|4856|rp=18}} uncompressed
|{{IETF RFC|3551|link=no}}{{Rp|p=27}}
|-
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|20
|[[Linear PCM]] 16-bit audio 705.6 kbit/s, uncompressed
|{{IETF RFC|3551|link=no}}{{Rp|p=27}}
|-
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|20
|[[QCELP|Qualcomm Code Excited Linear Prediction]]
|{{IETF RFC|2658|link=no}}, {{IETF RFC|3551|link=no}}{{Rp|p=28}}
|-
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|[[Comfort noise]]. Payload type used with audio codecs that do not support comfort noise as part of the codec itself such as [[G.711]], [[G.722.1]], [[G.722]], [[G.726]], [[G.727]], [[G.728]], [[GSM 06.10]], [[Siren (codec)|Siren]], and RTAudio.
|
|-
Line 198 ⟶ 245:
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|[[MPEG-1]] or [[MPEG-2]] audio only
|{{IETF RFC|2250|link=no}}, {{IETF RFC|3551|link=no}}
|-
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|20
|ITU-T [[G.728]] audio 16 kbit/s
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|-
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|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 44.1 kbit/s
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|-
Line 231 ⟶ 278:
|20
|IMA ADPCM audio 88.2 kbit/s
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|-
Line 242 ⟶ 289:
|20
|ITU-T [[G.729]] and G.729a audio 8 kbit/s; Annex B is implied unless the <code>annexb=no</code> parameter is used
|{{IETF RFC|3551|link=no}},{{Rp|p=20}} {{IETF RFC|4856|link=no}}{{Rp|p=12}}
|-
Line 253 ⟶ 300:
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|reserved, previously [[comfort noise]]
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|-
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|[[Sun Microsystems|Sun]] CellB video<ref>[https://docs.oracle.com/cd/E19504-01/802-5863/802-5863.pdf XIL Programmer's Guide], Chapter 22 "CellB Codec". August 1997. Retrieved on 2014-07-19.</ref>
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|-
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|[[JPEG]] video
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|-
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|[[Xerox PARC]]'s Network Video (nv)<ref>[https://www.cs.columbia.edu/~hgs/rtp/nv.html nv - network video on Henning Schulzrinne's website], [https://www.dgp.toronto.edu/tp/techdocs/NetVid.html Network Video on The University of Toronto's website], Retrieved on 2009-07-09.</ref><ref>[https://github.com/ronf/nv Ron Frederick Github with source code]</ref>
|{{IETF RFC|3551|link=no}}{{Rp|p=32}}
|-
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|ITU-T [[H.261]] video
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|-
Line 309 ⟶ 355:
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|MPEG-1 and MPEG-2 video
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|-
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|MPEG-2 [[MPEG transport stream|transport stream]]
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|-
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|[[H.263]] video, first version (1996)
|{{IETF RFC|2190|link=no}}, {{IETF RFC|3551|link=no}}
|-
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|reserved because RTCP packet types 200–204 would otherwise be indistinguishable from RTP payload types 72–76 with the marker bit set
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|-
Line 353 ⟶ 399:
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|note that RTCP packet type 207 (XR, Extended Reports) would be indistinguishable from RTP payload types 79 with the marker bit set
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|-
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|[[H.263]] video, second version (1998)
|{{IETF RFC|2190|link=no}}, {{IETF RFC|3551|link=no}}, {{IETF RFC|4629|link=no}}
|-
Line 375 ⟶ 421:
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|[[H.263]] video, third version (2000)
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|-
Line 386 ⟶ 432:
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|[[H.264]] video (MPEG-4 Part 10)
|{{IETF RFC
|-
Line 397 ⟶ 443:
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|[[H.264]] video
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|-
Line 408 ⟶ 454:
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|[[H.265]] video (HEVC)
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|-
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|20, 30
|[[iLBC|Internet low Bitrate Codec]] 13.33 or 15.2 kbit/s
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|-
Line 441 ⟶ 487:
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|ITU-T [[G.711|G.711.1]] A-law
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|-
Line 452 ⟶ 498:
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|ITU-T [[G.711|G.711.1]] μ-law
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|-
Line 474 ⟶ 520:
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|ITU-T [[G.719]]
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|-
Line 485 ⟶ 531:
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|ITU-T [[G.722.1]] and G.722.1 Annex C
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|-
Line 496 ⟶ 542:
|20
|ITU-T [[G.726]] audio 16 kbit/s
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|-
Line 507 ⟶ 553:
|20
|ITU-T G.726 audio 24 kbit/s
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|-
Line 518 ⟶ 564:
|20
|ITU-T G.726 audio 32 kbit/s
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|-
Line 529 ⟶ 575:
|20
|ITU-T G.726 audio 40 kbit/s
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|-
Line 540 ⟶ 586:
|20
|ITU-T [[G.729]] Annex D
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|-
Line 551 ⟶ 597:
|20
|ITU-T [[G.729]] Annex E
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|-
Line 562 ⟶ 608:
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|ITU-T [[G.729.1]]
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|-
Line 573 ⟶ 619:
|20
|ITU-T [[GSM-EFR]] (GSM 06.60)
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|-
Line 584 ⟶ 630:
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|ITU-T [[Half Rate|GSM-HR]] (GSM 06.20)
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|-
Line 595 ⟶ 641:
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|[[Adaptive Multi-Rate]] audio
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|-
Line 606 ⟶ 652:
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|[[AMR-WB|Adaptive Multi-Rate Wideband]] audio (ITU-T G.722.2)
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|-
Line 617 ⟶ 663:
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|[[AMR-WB+|Extended Adaptive Multi Rate – WideBand]] audio
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|-
Line 628 ⟶ 674:
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|[[Vorbis]] audio
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|-
Line 639 ⟶ 685:
|20
|[[Opus (audio format)|Opus]] audio
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|-
Line 650 ⟶ 696:
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|[[Speex]] audio
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|-
Line 661 ⟶ 707:
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|Loss-Tolerant [[MP3]] audio
|{{IETF RFC
|-
Line 672 ⟶ 718:
|
|[[MPEG-4 Audio]] (includes [[Advanced_Audio_Coding|AAC]])
|{{IETF RFC
|-
Line 683 ⟶ 729:
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|[[MPEG-4 Visual]]
|{{IETF RFC
|-
Line 694 ⟶ 740:
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|[[MPEG-4]] Elementary Streams
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|-
Line 705 ⟶ 751:
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|[[VP8]] video
|
|-
Line 716 ⟶ 762:
|
|[[VP9]] video
|{{IETF RFC|9628|link=no}}
|-
Line 738 ⟶ 784:
|20
|[[Linear PCM]] 8-bit audio with 128 offset
|{{IETF RFC
|-
Line 749 ⟶ 795:
|20 (by analogy with L16)
|IEC 61119 12-bit nonlinear audio
|{{IETF RFC
|-
Line 760 ⟶ 806:
|20
|[[Linear PCM]] 16-bit audio
|{{IETF RFC
|-
Line 771 ⟶ 817:
|20 (by analogy with L16)
|[[Linear PCM]] 20-bit audio
|{{IETF RFC
|-
Line 782 ⟶ 828:
|20 (by analogy with L16)
|[[Linear PCM]] 24-bit audio
|{{IETF RFC
|-
Line 793 ⟶ 839:
|
|Uncompressed Video
|
|-
Line 804 ⟶ 850:
|
|[[Dolby AC-3]] audio
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|-
Line 815 ⟶ 861:
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|[[Dolby Digital Plus|Enhanced AC-3]] audio
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|-
Line 826 ⟶ 872:
|
|[[Text over IP]]
|
|-
|dynamic
|EVRC<br>EVRC0<br>EVRC1
|audio
Line 836 ⟶ 883:
|
|[[Enhanced Variable Rate Codec|EVRC]] audio
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|-
|dynamic
Line 846 ⟶ 893:
|
|[[Enhanced Variable Rate Codec B|EVRC-B]] audio
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|-
Line 857 ⟶ 904:
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|[[Enhanced Variable Rate Codec B|EVRC-WB]] audio
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|-
Line 868 ⟶ 915:
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|[[JPEG 2000]] video
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|-
Line 879 ⟶ 926:
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|[[UEMCLIP]] audio
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|-
Line 890 ⟶ 937:
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3 audio
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|-
Line 901 ⟶ 948:
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3+ audio
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|-
Line 912 ⟶ 959:
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|[[Adaptive Transform Acoustic Coding|ATRAC]] Advanced Lossless audio
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|-
Line 923 ⟶ 970:
|
|[[DV (video format)|DV]] video
|{{IETF RFC
|-
Line 934 ⟶ 981:
|
|[[ITU-R BT.656]] video
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|-
Line 945 ⟶ 992:
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|Bundled MPEG-2 video
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|-
Line 956 ⟶ 1,003:
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|[[SMPTE 292M]] video
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|-
Line 967 ⟶ 1,014:
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|Redundant Audio Data
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|-
Line 978 ⟶ 1,025:
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|Variable-rate DVI4 audio
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|-
Line 989 ⟶ 1,036:
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|MPEG-1 Systems Streams video
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|-
Line 1,000 ⟶ 1,047:
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|MPEG-2 Program Streams video
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|-
Line 1,011 ⟶ 1,058:
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|tone
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|-
Line 1,022 ⟶ 1,069:
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|[[Dual-tone multi-frequency signaling|DTMF]] tone
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|-
Line 1,033 ⟶ 1,080:
|4<ref group=note>For aptX, the packetization interval must be rounded down to the nearest packet interval that can contain an integer number of samples. So at sampling rates of 11025, 22050, or 44100, a packetization rate of "4" is rounded down to 3.99.</ref>
|[[aptX]] audio
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|-
Line 1,044 ⟶ 1,091:
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|[[JPEG XS]] video
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|-
Line 1,055 ⟶ 1,102:
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|[[Secure Communications Interoperability Protocol|SCIP]]
|
|}
{{reflist|group=note}}
▲==Text messaging payload ==
▲==MIDI payload ==
==See also==
| |||