Patent ID: 8224150

Claim:
A recording/reproduction method by which data is read from a first recording medium containing first MPEG data which is divided taking a given data unit as one data group, and a recording/reproduction process for the read data is carried out, comprising: a reading step of reading the first MPEG data from the first recording medium; a decoding step of decoding the read first MPEG data to generate a decoded signal; a re-encoding step of re-encoding the decoded signal so as to make the amount of information smaller than that of the first MPEG data, to generate second MPEG data; an information obtaining step of obtaining positional information which indicates positions of previous and subsequent data groups of a specific data group in the second MPEG data with respect to said specific data group, on the basis of the second MPEG data; an information addition step of adding the positional information at a determined position in the second MPEG data, to generate third MPEG data; and a recording step of recording the third MPEG data on a second recording medium, wherein in the reading step, the first MPEG data is read at a speed which is higher than a real time reproduction speed at which the first MPEG data is normally decoded and displayed, and in the recording step, the second MPEG data is written on the second recording medium at a speed which is higher than a real time reproduction speed at which the second MPEG data is normally decoded and displayed.