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Line 2: 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. ==~~Audio~~Payload types and ~~video payload types~~formats== 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\|~~9071~~3550\|ref=yes}}▼ * {{Sum RFC\|3551\|ref=yes}} * {{Sum RFC\|~~6295~~3611\|ref=yes}}▼ * {{Sum RFC\|4856\|ref=yes}} Additional payload formats and payload types are defined in the following specifications:▼ ==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\|~~4696~~9071\|ref=yes}}▼ ==MIDI payload types==▼ ▲~~Additional payload~~Payload formats and ~~payload~~ 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 178 ⟶ 223: \|20 \|[[QCELP\|Qualcomm Code Excited Linear Prediction]] \|{{~~Sum~~IETF RFC\|2658\|~~title~~link=no~~\|ref=yes~~}}, {{IETF RFC\|3551\|link=no}}{{Rp\|p=28}} \|- Line 189 ⟶ 234: \| \|[[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. \|{{~~Sum~~IETF RFC\|3389\|~~title~~link=no~~\|ref=yes~~}} \|- Line 200 ⟶ 245: \| \|[[MPEG-1]] or [[MPEG-2]] audio only \|{{IETF RFC\|~~3551~~2250\|link=no}}, {{~~Sum~~IETF RFC\|~~2250~~3551\|~~title~~link=no~~\|ref=yes~~}} \|- Line 244 ⟶ 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}}, {{~~Sum~~IETF RFC\|4856\|~~title~~link=no~~\|ref=yes~~}}{{Rp\|p=12}} \|- Line 266 ⟶ 311: \| \|[[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> \|{{~~Sum~~IETF RFC\|2029\|~~title~~link=no~~\|ref=yes~~}} \|- Line 277 ⟶ 322: \| \|[[JPEG]] video \|{{~~Sum~~IETF RFC\|2435\|~~title~~link=no~~\|ref=yes~~}} \|- Line 299 ⟶ 344: \| \|ITU-T [[H.261]] video \|{{~~Sum~~IETF RFC\|4587\|~~title~~link=no~~\|ref=yes~~}} \|- Line 310 ⟶ 355: \| \|MPEG-1 and MPEG-2 video \|{{~~Sum~~IETF RFC\|2250\|~~title~~link=no}} \|- Line 321 ⟶ 366: \| \|MPEG-2 [[MPEG transport stream\|transport stream]] \|{{~~Sum~~IETF RFC\|2250\|~~title~~link=no}} \|- Line 332 ⟶ 377: \| \|[[H.263]] video, first version (1996) \|{{IETF RFC\|~~3551~~2190\|link=no}}, {{~~Sum~~IETF RFC\|~~2190~~3551\|~~title~~link=no~~\|ref=yes~~}} \|- Line 343 ⟶ 388: \| \|reserved because RTCP packet types 200–204 would otherwise be indistinguishable from RTP payload types 72–76 with the marker bit set \|{{~~Sum~~IETF RFC\|3550\|~~title~~link=no~~\|ref=yes~~}}, {{IETF RFC\|3551\|link=no}} \|- Line 354 ⟶ 399: \| \|note that RTCP packet type 207 (XR, Extended Reports) would be indistinguishable from RTP payload types 79 with the marker bit set \|{{IETF RFC\|3551\|link=no}}, {{~~Sum~~IETF RFC\|3611\|~~title~~link=no}} \|- Line 365 ⟶ 410: \| \|[[H.263]] video, second version (1998) \|{{IETF RFC\|~~3551~~2190\|link=no}}, {{~~Sum~~IETF RFC\|~~4629~~3551\|~~title~~link=no~~\|ref=yes~~}}, {{~~Sum~~IETF RFC\|~~2190~~4629\|~~title~~link=no}} \|- Line 376 ⟶ 421: \| \|[[H.263]] video, third version (2000) \|{{~~Sum~~IETF RFC\|4629\|~~title~~link=no}} \|- Line 387 ⟶ 432: \| \|[[H.264]] video (MPEG-4 Part 10) \|{{~~Sum~~IETF RFC\|6184\|~~title~~link=no~~\|ref=yes~~}} \|- Line 398 ⟶ 443: \| \|[[H.264]] video \|{{~~Sum~~IETF RFC\|6190\|~~title~~link=no~~\|ref=yes~~}} \|- Line 409 ⟶ 454: \| \|[[H.265]] video (HEVC) \|{{~~Sum~~IETF RFC\|7798\|~~title~~link=no~~\|ref=yes~~}} \|- Line 431 ⟶ 476: \|20, 30 \|[[iLBC\|Internet low Bitrate Codec]] 13.33 or 15.2 kbit/s \|{{~~Sum~~IETF RFC\|3952\|~~title~~link=no~~\|ref=yes~~}} \|- Line 442 ⟶ 487: \| \|ITU-T [[G.711\|G.711.1]] A-law \|{{~~Sum~~IETF RFC\|5391\|~~title~~link=no~~\|ref=yes~~}} \|- Line 453 ⟶ 498: \| \|ITU-T [[G.711\|G.711.1]] μ-law \|{{~~Sum~~IETF RFC\|5391\|~~title~~link=no}} \|- Line 475 ⟶ 520: \| \|ITU-T [[G.719]] \|{{~~Sum~~IETF RFC\|5404\|~~title~~link=no~~\|ref=yes~~}} \|- Line 486 ⟶ 531: \| \|ITU-T [[G.722.1]] and G.722.1 Annex C \|{{~~Sum~~IETF RFC\|5577\|~~title~~link=no~~\|ref=yes~~}} \|- Line 563 ⟶ 608: \| \|ITU-T [[G.729.1]] \|~~RFC~~{{IETF RFC\|4749\|link=no}} \|- Line 585 ⟶ 630: \| \|ITU-T [[Half Rate\|GSM-HR]] (GSM 06.20) \|~~RFC~~{{IETF RFC\|5993\|link=no}} \|- Line 596 ⟶ 641: \| \|[[Adaptive Multi-Rate]] audio \|~~RFC~~{{IETF RFC\|4867\|link=no}} \|- Line 607 ⟶ 652: \| \|[[AMR-WB\|Adaptive Multi-Rate Wideband]] audio (ITU-T G.722.2) \|~~RFC~~{{IETF RFC\|4867\|link=no}} \|- Line 618 ⟶ 663: \| \|[[AMR-WB+\|Extended Adaptive Multi Rate – WideBand]] audio \|~~RFC~~{{IETF RFC\|4352\|link=no}} \|- Line 629 ⟶ 674: \| \|[[Vorbis]] audio \|~~RFC~~{{IETF RFC\|5215\|link=no}} \|- Line 640 ⟶ 685: \|20 \|[[Opus (audio format)\|Opus]] audio \|~~RFC~~{{IETF RFC\|7587\|link=no}} \|- Line 651 ⟶ 696: \| \|[[Speex]] audio \|~~RFC~~{{IETF RFC\|5574\|link=no}} \|- Line 662 ⟶ 707: \| \|Loss-Tolerant [[MP3]] audio \|{{IETF RFC \|5219 ~~(previously RFC 3119)~~\|link=no}} \|- Line 673 ⟶ 718: \| \|[[MPEG-4 Audio]] (includes [[Advanced_Audio_Coding\|AAC]]) \|{{IETF RFC \|6416 ~~(previously RFC 3016)~~\|link=no}} \|- Line 684 ⟶ 729: \| \|[[MPEG-4 Visual]] \|{{IETF RFC \|6416 ~~(previously RFC 3016)~~\|link=no}} \|- Line 695 ⟶ 740: \| \|[[MPEG-4]] Elementary Streams \|~~RFC~~{{IETF RFC\|3640\|link=no}} \|- Line 706 ⟶ 751: \| \|[[VP8]] video \|~~RFC~~{{IETF RFC\|7741\|link=no}} \|- Line 717 ⟶ 762: \| \|[[VP9]] video \|{{IETF RFC\|9628\|link=no}} ~~\|[https://tools.ietf.org/html/draft-ietf-payload-vp9 draft-ietf-payload-vp9]~~ \|- Line 739 ⟶ 784: \|20 \|[[Linear PCM]] 8-bit audio with 128 offset \|{{IETF RFC \|3551 ~~Section~~\|link=no}}{{Rp\|§ 4.5.10 ~~and~~ }}{{Rp\|Table 5}} \|- Line 750 ⟶ 795: \|20 (by analogy with L16) \|IEC 61119 12-bit nonlinear audio \|{{IETF RFC \|3190 ~~Section~~ \|link=no}}{{Rp\|§3}} \|- Line 761 ⟶ 806: \|20 \|[[Linear PCM]] 16-bit audio \|{{IETF RFC \|3551 ~~Section~~\|link=no}},{{Rp\|§ 4.5.11,}} {{IETF RFC \|2586\|link=no}} \|- Line 772 ⟶ 817: \|20 (by analogy with L16) \|[[Linear PCM]] 20-bit audio \|{{IETF RFC \|3190 ~~Section~~\|link=no}}{{Rp\|§ 4}} \|- Line 783 ⟶ 828: \|20 (by analogy with L16) \|[[Linear PCM]] 24-bit audio \|{{IETF RFC \|3190 ~~Section~~\|link=no}}{{Rp\|§ 4}} \|- Line 794 ⟶ 839: \| \|Uncompressed Video \|~~RFC~~{{IETF RFC\|4175\|link=no}} \|- Line 805 ⟶ 850: \| \|[[Dolby AC-3]] audio \|~~RFC~~{{IETF RFC\|4184\|link=no}} \|- Line 816 ⟶ 861: \| \|[[Dolby Digital Plus\|Enhanced AC-3]] audio \|~~RFC~~{{IETF RFC\|4598\|link=no}} \|- Line 827 ⟶ 872: \| \|[[Text over IP]] \|~~RFC~~{{IETF RFC\|4103\|link=no}} \|- \|dynamic \|EVRC<br>EVRC0<br>EVRC1 \|audio Line 837 ⟶ 883: \| \|[[Enhanced Variable Rate Codec\|EVRC]] audio \|~~RFC~~{{IETF RFC\|4788\|link=no}} \|- \|dynamic Line 847 ⟶ 893: \| \|[[Enhanced Variable Rate Codec B\|EVRC-B]] audio \|~~RFC~~{{IETF RFC\|4788\|link=no}} \|- Line 858 ⟶ 904: \| \|[[Enhanced Variable Rate Codec B\|EVRC-WB]] audio \|~~RFC~~{{IETF RFC\|5188\|link=no}} \|- Line 869 ⟶ 915: \| \|[[JPEG 2000]] video \|~~RFC~~{{IETF RFC\|5371\|link=no}} \|- Line 880 ⟶ 926: \| \|[[UEMCLIP]] audio \|~~RFC~~{{IETF RFC\|5686\|link=no}} \|- Line 891 ⟶ 937: \| \|[[Adaptive Transform Acoustic Coding\|ATRAC]]3 audio \|~~RFC~~{{IETF RFC\|5584\|link=no}} \|- Line 902 ⟶ 948: \| \|[[Adaptive Transform Acoustic Coding\|ATRAC]]3+ audio \|~~RFC~~{{IETF RFC\|5584\|link=no}} \|- Line 913 ⟶ 959: \| \|[[Adaptive Transform Acoustic Coding\|ATRAC]] Advanced Lossless audio \|~~RFC~~{{IETF RFC\|5584\|link=no}} \|- Line 924 ⟶ 970: \| \|[[DV (video format)\|DV]] video \|{{IETF RFC \|6469 ~~(previously RFC 3189)~~\|link=no}} \|- Line 935 ⟶ 981: \| \|[[ITU-R BT.656]] video \|~~RFC~~{{IETF RFC\|3555\|link=no}} \|- Line 946 ⟶ 992: \| \|Bundled MPEG-2 video \|~~RFC~~{{IETF RFC\|2343\|link=no}} \|- Line 957 ⟶ 1,003: \| \|[[SMPTE 292M]] video \|~~RFC~~{{IETF RFC\|3497\|link=no}} \|- Line 968 ⟶ 1,014: \| \|Redundant Audio Data \|~~RFC~~{{IETF RFC\|2198\|link=no}} \|- Line 979 ⟶ 1,025: \| \|Variable-rate DVI4 audio \|~~RFC~~{{IETF RFC\|3551\|link=no}} \|- Line 990 ⟶ 1,036: \| \|MPEG-1 Systems Streams video \|~~RFC~~{{IETF RFC\|2250\|link=no}} \|- Line 1,001 ⟶ 1,047: \| \|MPEG-2 Program Streams video \|~~RFC~~{{IETF RFC\|2250\|link=no}} \|- Line 1,012 ⟶ 1,058: \| \|tone \|~~RFC~~{{IETF RFC\|4733\|link=no}} \|- Line 1,023 ⟶ 1,069: \| \|[[Dual-tone multi-frequency signaling\|DTMF]] tone \|~~RFC~~{{IETF RFC\|4733\|link=no}} \|- Line 1,034 ⟶ 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 \|~~RFC~~{{IETF RFC\|7310\|link=no}} \|- Line 1,045 ⟶ 1,091: \| \|[[JPEG XS]] video \|~~RFC~~{{IETF RFC\|9134\|link=no}} \|- Line 1,056 ⟶ 1,102: \| \|[[Secure Communications Interoperability Protocol\|SCIP]] \|~~RFC~~{{IETF RFC\|9607\|link=no}} \|} {{reflist\|group=note}} ▲==Text messaging payload == ▲* {{Sum RFC\|4103\|ref=yes\|notes=yes}} ▲* {{Sum RFC\|9071\|ref=yes}} ▲==MIDI payload == ▲{{Sum RFC\|6295\|ref=yes}} ▲{{Sum RFC\|4696\|ref=yes}} ==See also==