Patent ID: 7400656

Claim:
A time stamp correction apparatus which receives a packet including real time data and a time stamp, which is based on network time and to be added to the real time data from a network, and reproduces the real time data in the received packet on the basis of the time stamp, the time stamp correction apparatus comprising: a packet receiving unit which receives a first packet including the real time data and a first time stamp based on the network time from the network; a network time counter which successively generates the network time in accordance with network time synchronous information input from the network; a difference calculating unit supplied with the first time stamp included in the received first packet to calculate a difference between time indicated by the first time stamp and the network time; a local time counter which successively generates local time; a time stamp generating unit which generates a second time stamp on the basis of the difference and the local time; a packet generating unit which generates a second packet by adding the second time stamp to the real time data; a buffer unit which stores the generated second packet; and an output control unit which conducts output control on the second packet in the buffer unit on the basis of the local time.