| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for creating a MP4 file capable of reducing a storage area for recording the file and time required for download of the file by minimizing file size. SOLUTION: This file creating method includes a data input unit 202 that inputs audio data from outside and outputs digital audio data, an encoding unit 203 that encodes the digital audio data, creates one access unit by putting together encoded samples so as to keep the size of all the access units the same in a byte unit, a format creating unit 204 that acquires format information from the encoding unit 203, creates header information of the MP4 file and a file output unit 205 that creates an access unit train by multiplexing the access units acquired from the encoding unit 203 and outputs the MP4 file by combining the access unit train and the header information acquired from the format creating unit 204. COPYRIGHT: (C)2003,JPO
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