Recording medium, playback apparatus, method and program
AssigneePanasonic Corporation
InventorsJoseph McCrossan, Wataru Ikeda, Tomoyuki Okada, Yoshio Kawakami
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Abstract
A plurality of video streams and STN_table are recorded in the local storage 200. Each of the plurality of video streams is a secondary video stream to be played together with a primary video stream, and includes picture data representing a child image to be displayed in Picture in Picture that is composed of a parent image and the child image. In the STN_table, entries of secondary video streams that are permitted to be played are described in the order of priority.
Claims2
A playback apparatus for performing Picture in Picture playback using primary video streams and secondary video streams in accordance with playlist information, the playback apparatus comprising:
- a reading unit operable to read out primary video streams and secondary video streams from a recording medium;
- and
- a composing unit operable to realize a Picture in Picture by composing pictures represented by the secondary video streams with pictures represented by the primary video streams;
- wherein
- the play list information defines a playback section for each of a plurality of video streams, and includes main-path information, sub-path information, and metadata,
- the main-path information defines main playback sections for primary video streams among the plurality of video streams,
- the sub-path information defines sub playback sections for secondary video streams among the plurality of video streams, and includes synchronization information,
- the metadata is used for the Picture in Picture and composed of data blocks each corresponding to any one of the main playback sections, each data block including a header and an entry,
- each header includes a reference to a corresponding one of the secondary video streams, a reference to a corresponding one of the main playback sections, and a trick playback enable flag,
- each entry defines a time stamp indicating time to compose a screen, horizontal and vertical coordinates of a secondary video used for composing the screen, and a scale rate of the secondary video,
- each trick playback enable flag shows an intention of a content provider on whether a window for the Picture in Picture is to be left open or to be closed, and
- the playback apparatus performs trick playback of a primary video stream in accordance with an operation of a user, and
- when a data block corresponding to a current main playback section includes a trick playback enable flag showing that a window is to be closed, closes a window for the secondary video after trick playback starts.
A recording method comprising the steps of:
- generating play list information;
- and
- recording the play list information, with a recording unit to record primary video streams, and secondary video streams in a recording medium, wherein
- the play list information defines a playback section for each of a plurality of video streams, and includes main-path information, sub-path information, and metadata,
- the main-path information defines main playback sections for primary video streams among the plurality of video streams,
- the sub-path information defines sub playback sections for secondary video streams among the plurality of video streams, and includes synchronization information,
- the metadata is used for a Picture in Picture and composed of data blocks each corresponding to any one of the main playback sections, each data block including a header and an entry,
- each header includes a reference to a corresponding one of the secondary video streams, a reference to a corresponding one of the main playback sections, and a trick playback enable flag,
- each entry defines a time stamp indicating time to compose a screen, horizontal and vertical coordinates of a secondary video used for composing the screen, and a scale rate of the secondary video, and
- each trick playback enable flag shows an intention of a content provider on whether a window for the Picture in Picture is to be left open or to be closed, and when a trick playback enable flag shows that a window is to be closed, instructs a playback apparatus to close a window for the secondary video after trick playback starts.
Dependencies are inferred from the claim text.