What is RTP timestamp?
RTP timestamp is an important attribute in RTP header and is used plug the packet in right order for playback. Packetization time – Packetization time represents one RTP packet duration in milliseconds. For example, In G711 case, one RTP packet may represent 20 millisecond.
What is the RTCP protocol used for?
RTCP is used in voice over IP (VoIP) and Internet Protocol Television (IPTV), streaming media and video conferencing. RTCP carries statistical and control data, while RTP delivers the data. RTCP statistics typically include the number of bytes sent, packets sent, lost packets and round trip delay between endpoints.
What kind of information would RTCP generate on a network?
The primary function of RTCP is to provide feedback on the quality of service (QoS) in media distribution by periodically sending statistics information such as transmitted octet and packet counts, packet loss, packet delay variation, and round-trip delay time to participants in a streaming multimedia session.
What is the relationship between RTP RTCP and RTSP?
RTCP is a part of RTP and helps with lip synchronization and QOS management, among others. RTSP is a control protocol that initiating and directing delivery of streaming multimedia from media servers, the “Internet VCR remote control protocol”.
Can RTP work without Rtcp?
RTP can be used readily, but it may be necessary to have only data senders send RTCP messages. These RTCP messages are useful to allow inter-media synchronization and identify the content of the media stream.
What OSI layer is RTCP?
In the context of the OSI Reference Model, RTP falls into both the Session Layer (Layer 5) and the Presentation Layer (Layer 6). RTP Control Protocol (RTCP) is an upper-layer companion protocol that allows monitoring of the data delivery.
What applications use RTCP?
RTCP is used in voice over IP (VoIP) and Internet Protocol Television (IPTV), streaming media and video conferencing. RTCP carries statistical and control data, while RTP delivers the data.
What can RTCP do that RTP Cannot?
RTCP works hand in hand with RTP. RTP does the delivery of the actual data, whereas RTCP is used to send control packets to participants in a call. RTCP does not provide any flow encryption or authentication methods, but such mechanisms can be implemented with the use of the Secure Real-time Transport Protocol (SRTP).
