DATA TRANSPORT

摘要

A data streaming apparatus (100) is provided for broadcasting data, encoded by a layered encoding algorithm, each layer of encoded data frames being conveyed within separate respective streams of data packet s of a predetermined packet structure, including a packet numbering facility (125) to assign to each data packet a data sequence numbe r indicating the correct order for subsequent decoding of encoded data conveyed by that packet. Corresponding client apparatus (200) i s also provided to receive data packets having such data sequence numbers assigned to them, including a packet ordering facility (220 ) to place out-of-sequence packets into the correct order for output to a decoder.