A BD-ROM has recorded therein an AV Clip generated by multiplexing a video stream and a graphics stream. The graphics stream represents an interactive display to be overlayed with the video stream, and includes a sequence of three Button State groups. The interactive display includes a plurality of buttons,...http://www.google.com/patents/US7546024?utm_source=gb-gplus-sharePatent US7546024 - Recording medium, reproduction apparatus, recording method, program, and reproduction method
