To easily synthesize a plurality of compressively coded stream data.
A time entry acquisition means 104 removes an audio pack from packs comprised in first stream data (a) being an origin of composition and outputs stream data (a'), extracts a time entry comprised in its pack header, and outputs the extracted time entry. A pack drawing-out means 105 draws an audio pack aiming to synthesize out from second stream data (b), and outputs the pack as drawn-out data (c). A pack conversion means 106 converts a time entry comprised in the pack header of each pack of the drawn-out data (c) into a time entry corresponding to the first data (a) on the basis of the extracted time entry, outputs the converted data (d), and outputs an insertion control signal along with it at a predetermined timing. A pack insertion means 107 inserts each pack of the converted data (d) into the stream data (a').
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
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