`
`What is claimed is:
`
`1. A playback device that plays a content, the playback device comprising:
`
`a management information acquirer, and
`
`a video player,
`
`wherein the management information acquirer acquires first management information
`
`and second management information that are playback control information ofthe content,
`
`first playback control information, specifying that 1) a video stream of a high-luminance
`
`range which is a broader luminance range than a standard-luminance range and ii) a subtitle
`
`stream of the high-luminance range are to be played in combination,
`
`is stored in the first
`
`management information,
`
`second playback control information, specifying that i) a video stream of the standard-
`
`luminance range and ti} a subtitle stream of the standard-luminance range are to be played in
`
`combination, is stored in the second management information,
`
`the video player acquires and plays the video stream of the high-luminance range andthe
`
`subtitle stream ofthe high-luminance range based on the first playback control information in a
`
`case of playing the content as the high-luminance range, and
`
`the video player acquires and plays the video stream of the standard-luminance range and
`
`the subtitle stream of the standard-luminance range based on the second playback control
`
`information in a case of playing the content as the standard-luminance range.
`
`2. A playback method of playing a content, the playback method comprising:
`
`acquiring management information; and
`
`{P60273 04296698. DOC}
`60
`
`
`
`P60273
`
`playing a video,
`
`wherein the acquiring acquires first management information and second management
`
`information that are playback control information ofthe content,
`
`first playback control information, specifying that 1) a video stream of a high-luminance
`
`range which is a broader luminance range than a standard-luminance range and ti) a subtitle
`
`stream of the high-luminance range are to be played in combination,
`
`is stored in the first
`
`management information,
`
`second playback control information, specifying that i) a video stream of the standard-
`
`luminance range and ti} a subtitle stream of the standard-luminance range are to be played in
`
`combination, ts stored in the second management information, and
`
`the playing the video includes:
`
`acquiring and playing the video stream of the high-luminance range and the
`
`subtitle stream of the high-luminance range based on the first playback control information in a
`
`case of playing the content as the high-liminance range, and
`
`acquiring and playing the video stream of the standard-luminance range and the
`
`subtitle stream of the standard-lurninance range based on the second playback control
`
`information in a case of playing the content as the standard-luminancerange.
`
`42
`{P60273 04256698 DOC}
`61
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