transmitting apparatus and receiving apparatus and data processing method thereof

Disclosed is a data processing method of a transmission apparatus, which can improve data transmission efficiency. The data processing method of the transmission apparatus comprises: a step of generating a frame containing at least one data packet; a step of inserting a header into the frame, wherein the header contains information related to a data field occupied by the data packet; and a step of transmitting the frame equipped with the header to a reception apparatus. The information related to a data field includes: first information for indicating whether or not the starting byte of a first data packet is included in the data field; and second information for indicating whether or not the ending byte of a last data packet is included in the data field.