Information recording medium, information recording device and method, information reproduction device and method, information recording/reproduction device and method, recording or reproduction control computer program, and data structure containing control signal

摘要

An information record medium is provided with video information for indicating a main-video and a sub-video information set. The sub-video information set has (i) sub-video information to indicate a sub-video displayable at least partially over the main-video and (ii) header information appended to the sub-video information and including: button information for defining a button video part which functions as a button in the sub-video; and highlight information for defining how to perform highlight display control with respect to the button video part.