Patent 7519278 was granted and assigned to Panasonic on April, 2009 by the United States Patent and Trademark Office.
A BD-ROM playback apparatus plays back a text subtitle stream during a playback of moving pictures. A reserved area of a PSR stores therein, as a supplementary language, an identifier of a language in which the playback apparatus is not capable of decoding a text subtitle stream, due to inconvenience caused during display of the text subtitle.