Patent attributes
A data processing apparatus includes an encoder and a processor. The encoder generates reproduction units each including I/B/P picture data, and information indicating reproduction time to reproduce each of the pictures to generate a data stream. The processor generates, in accordance with the type of the recording medium, one of basic picture information and reproduction unit information, and time length information. Such information is stored in one or more tables of the respective units as management information. The basic picture information defines a correspondence between a reproduction time to reproduce the first I picture which is recorded at the top of the each unit, and a recording position of the I picture. The reproduction unit information defines a correspondence between a reproduction time length of each unit and a recording position of the I picture. The time length information relates to the reproduction time length on pictures in each unit.
