1 / 10

RTP/RTCP – Real Time Transport Protocol/ Real Time Control Protocol

RTP/RTCP – Real Time Transport Protocol/ Real Time Control Protocol. Presented by Manoj Sivakumar. Overview. Motivation RTP/RTCP description. Motivation. TCP/IP Not suitable for real-time Retransmissions can lead to high delay and cause delay jitter Does not support multicast

tedt
Download Presentation

RTP/RTCP – Real Time Transport Protocol/ Real Time Control Protocol

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. RTP/RTCP – Real Time Transport Protocol/ Real Time Control Protocol Presented by Manoj Sivakumar

  2. Overview • Motivation • RTP/RTCP description

  3. Motivation • TCP/IP • Not suitable for real-time • Retransmissions can lead to high delay and cause delay jitter • Does not support multicast • Congestion control mechanism (slow start) not suitable for AV media • UDP/IP • No defined technique for synchronizing • Streams from different servers may collide • A feedback channel must be defined for quality control

  4. RTP/RTCP • A session consists of an RTP/RTCP pair of channels • Usually works over UDP/IP • End-to-end protocol

  5. RTP/RTCP • RTP Features • Multicasting • Payload type identification • Time shaping • Sequencing • Delivery monitoring

  6. RTP/RTCP • RTP Issues • No QoS guarantees • No guarantee of packet delivery • RTP Timestamp (TS) and Sequence Number (SN) • TS used to order packets in correct timing order • SN to detect packet loss • For a video frame that spans multiple packets – TS is same but SN is different

  7. RTP/RTCP • RTCP • Synchronize across different media streams • Provide feedback on the quality of data using lost packet counts • Identify and keep track of participants • Retransmission requests

  8. RTP/RTCP Media Application RTP RTCP UDP IP

  9. RTP/RTCP RTP HEADER

  10. Reference • www.cs.columbia.edu/~hgs/rtp/papers.html

More Related