Apparatus and method for inserting or extracting network timestamp

An apparatus for extracting a network timestamp from a user datagram protocol (UDP) packet stream or a real time protocol (RTP) packet stream, the apparatus comprising:

• a depacketizer to depacketize the UDP packet stream or the RTP packet stream and divide the UDP packet stream or the RTP packet stream into a transport stream (TS) packet and a packet having the timestamp;
• and
• a timestamp extractor to extract the timestamp from the packet having the timestamp wherein the timestamp is used to compensate for network jitter or used for synchronization between a transmitting party and a receiving party.

A network timestamp inserting method in a multimedia stream transport environment based on a network, the method comprising:

• generating a timestamp used to compensate for network jitter or used for synchronization between a transmitting party and a receiving party;
• and
• packetizing transport stream (TS) packets into at least one user datagram protocol (UDP) packet or at least one real time transport protocol (RTP) packet into which a packet having the timestamp is inserted.

A method of extracting a network timestamp in a multimedia stream transport environment based on a network, the method comprising:

• separating a packet having a timestamp from a transport stream (TS) packet by depacketizing a user datagram protocol (UDP) packet stream or an real time transport protocol (RTP) packet stream;
• and
• extracting the timestamp from the packet having the timestamp, wherein the timestamp is used to compensate for network jitter and used for synchronization between a transmitting party and a receiving party.