| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a data generation device capable of efficiently reducing the size of a data storing file while maintaining an accurate time stamp which is not visually deteriorated in inputting the multimedia data of video images, sound, etc. <P>SOLUTION: The time stamp is read from an encrypted data and a highly accurate time scale for providing second clock accuracy is calculated on the basis of the frame rate of the encrypted data and first clock accuracy relative to the time stamp. A first offset which is the logical offset of the time stamp between two frames in the encrypted data and a second offset which is the logical offset of a highly accurate time stamp between two frames in the highly accurate time scale are calculated, the time stamp of the encrypted data is converted into the highly accurate time stamp on the basis of correspondence relation between the first and second offsets and a time stamp table is generated by using the highly accurate time stamp. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
