Patent ID: 8774017

Claim:
A data reception method for receiving, from a transmitting end, data in packet units, each packet unit containing transmission data, the packet units being received at a receiving end, said data receiving method comprising: receiving an uncompressed packet in which predetermined transmission data is stored as uncompressed data; subsequently and continuously receiving compressed packets in which at least a portion of transmission data, following the predetermined transmission data, is compressed and stored as compressed data; restoring transmission data from a compressed packet to be restored, the transmission data being restored based on update information relating to a packet that is received prior to receiving the compressed packet to be restored and based on compressed data included in the compressed packet to be restored; setting the predetermined transmission data in the uncompressed packet as an initial value of the update information; and subsequently updating the update information to information included in transmission data restored from a specific compressed packet each time when the transmission data from the specific compressed packet is restored, such that the update information is not updated when the compressed packet other than the specific compressed packet is received.