A data transmission apparatus has a multiplexing unit that cyclically
multiplexes presentation information and navigation information stored in
a transmission data storage unit according to control by a multiplexing
control unit and a transmission unit that transmits the multiplexed
stream. The reception control unit of a data reception apparatus sets
filter conditions in a filter condition storage unit of a TS decoder unit
in accordance with user operation indications. The presentation
information and navigation information separated by the TS decoder unit
are outputted via a reproduction unit to a display unit and an audio
output unit.