Information recording device information recording method information reproduction device information reproduction method information recording program information reproduction program information recording medium and recording medium

摘要

This invention provides a information-recording medium that makes it possible to execute smooth processing without having to continuously calculate when the applicable changing point of the encoding key. AV stream information 3 in which encoding information is recorded that is obtained by encoding an MPEG2-standard transport stream comprising an application GOP while changing the encoding key at the boundary of a CBC block different from that application GOP, and a key-change flag 11 in which key-change information that indicates whether or not a plurality of encoding keys is necessary for encoding I pictures contained in the application GOP in the encoded information are recorded on a hard disc 1.