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Protocol

RTP

Real-time Transport Protocol

Lab ready Full lab

End-to-end media transport for audio/video: sequence numbers, timestamps, SSRC, and payload type. Usually over UDP; profile and format specs define codec bitstreams. RTCP provides QoS feedback.

Domains

  • telephony
  • av
  • internet

Layers

  • transport
  • application

Tags

mediatimestampssrcpayloadudp

Sources

  • RFC 3550
  • RFC 3551 (AVP profile)

Related protocols

RTCP

Lab ready

Companion control protocol to RTP providing sender/receiver reports, SDES identity, BYE, and extension feedback. Report intervals scale w…

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SRTP

Lab ready

Secure RTP/RTCP with encryption and authentication, keyed from SDES, DTLS-SRTP, or MIKEY. A rollover counter (ROC) and key derivation pro…

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SDP

Lab ready

Textual session description: media lines, codecs (rtpmap/fmtp), ICE candidates, and direction attributes. Carried in SIP, WebRTC, and MGC…

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SIP

Lab ready

Text-based signaling for creating and managing sessions. Methods (INVITE, ACK, BYE, REGISTER…) and response codes resemble HTTP; SDP bodi…

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G.711

Lab ready

64 kb/s PCM audio codecs for telephony: μ-law (PCMU, North America/Japan) and A-law (PCMA, elsewhere) compress linear samples with logari…

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DTMF (RFC 4733)

Lab ready

RTP payload format for named telephone events such as DTMF digits, replacing unreliable in-band tones. Event, end bit, volume, and durati…

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