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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.
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* {{Sum RFC|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|9071|ref=yes}}▼
==MIDI payload types==▼
▲
*{{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}}
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|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}}
|-
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|[[AMR-WB+|Extended Adaptive Multi Rate – WideBand]] audio
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|-
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|[[Vorbis]] audio
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|-
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|20
|[[Opus (audio format)|Opus]] audio
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|-
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|[[Speex]] audio
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|-
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|Loss-Tolerant [[MP3]] audio
|{{IETF RFC
|-
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|[[MPEG-4 Audio]] (includes [[Advanced_Audio_Coding|AAC]])
|{{IETF RFC
|-
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|[[MPEG-4 Visual]]
|{{IETF RFC
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|[[MPEG-4]] Elementary Streams
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|-
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|[[VP8]] video
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|-
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|20
|[[Linear PCM]] 8-bit audio with 128 offset
|{{IETF RFC
|-
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|20 (by analogy with L16)
|IEC 61119 12-bit nonlinear audio
|{{IETF RFC
|-
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|20
|[[Linear PCM]] 16-bit audio
|{{IETF RFC
|-
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|20 (by analogy with L16)
|[[Linear PCM]] 20-bit audio
|{{IETF RFC
|-
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|20 (by analogy with L16)
|[[Linear PCM]] 24-bit audio
|{{IETF RFC
|-
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|Uncompressed Video
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|-
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|[[Dolby AC-3]] audio
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|-
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|[[Dolby Digital Plus|Enhanced AC-3]] audio
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|-
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|[[Text over IP]]
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|-
|dynamic
|EVRC<br>EVRC0<br>EVRC1
|audio
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|[[Enhanced Variable Rate Codec|EVRC]] audio
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|-
|dynamic
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|[[Enhanced Variable Rate Codec B|EVRC-B]] audio
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|-
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|[[Enhanced Variable Rate Codec B|EVRC-WB]] audio
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|-
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|[[JPEG 2000]] video
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|-
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|[[UEMCLIP]] audio
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|-
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3 audio
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|-
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3+ audio
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|-
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|[[Adaptive Transform Acoustic Coding|ATRAC]] Advanced Lossless audio
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|-
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|[[DV (video format)|DV]] video
|{{IETF RFC
|-
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|[[ITU-R BT.656]] video
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|-
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|Bundled MPEG-2 video
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|-
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|[[SMPTE 292M]] video
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|-
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|Redundant Audio Data
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|-
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|Variable-rate DVI4 audio
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|-
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|MPEG-1 Systems Streams video
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|-
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|MPEG-2 Program Streams video
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|-
Line 1,027 ⟶ 1,058:
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|tone
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|-
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|[[Dual-tone multi-frequency signaling|DTMF]] tone
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|-
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|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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|-
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|[[JPEG XS]] video
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|[[Secure Communications Interoperability Protocol|SCIP]]
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|}
{{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==
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