DATA RECORDING DEVICE, METHOD, AND PROGRAM, DATA REPRODUCTION DEVICE, METHOD, AND PROGRAM, RECORDING MEDIUM, AND DATA STRUCTURE

摘要

A video stream is encoded with a prediction mode of which a picture later than an I picture in the display order is predicted from a picture earlier than the I picture in the display order and recorded on a record medium so that the video stream reproduced from the record medium is randomly accessible. When a video stream is encoded, the prediction mode of which a picture later than an I picture in the display order is predicted from a picture earlier than the I picture in the display order is prohibited. In addition, EP_map that correlates reproduction time information of an I picture to a packet number of the I picture is created and recorded on the record medium along with a packetized encoded stream. When the video stream is reproduced, EP_map is searched for a packet number corresponding to a designated reproduction time. Corresponding to the obtained packet number, decoding of an encoded stream reproduced from the record medium is controlled. As a result, a random access reproduction designated with a reproduction time is assured.