Recording medium, playback device, and integrated circuit

A method for recording a video stream and a graphics stream on a recording medium, comprising:

• generating a main-view video stream that includes main-view pictures constituting main views of stereoscopic video images;
• generating a sub-view video stream that includes sub-view pictures and metadata, the sub-view pictures constituting sub-views of stereoscopic video images;
• generating a graphics stream that includes graphics data constituting monoscopic graphics images;
• recording the main-view video stream on the recording medium;
• recording the sub-view video stream on the recording medium;
• and
• recording the graphics stream on the recording medium, wherein
• the main-view pictures are each rendered on a main-view video plane when being played back,
• the sub-view pictures are each rendered on a sub-view video plane when being played back,
• the graphics data is rendered on a graphics plane when being played back,
• the metadata is provided in each group of pictures (GOP) constituting the sub-view video stream and includes offset information,
• the offset information is control information specifying offset control,
• the offset control is a process to provide a left offset and a right offset for horizontal coordinates in the graphics plane to generate a pair of graphics planes, and then combine the pair of graphics planes separately with the main-view video plane and the sub-view video plane,
• the sub-view video stream is multiplexed in a transport stream (TS),
• TS packets constituting the TS each have a header including a TS priority flag indicating a priority of the TS packet, and
• TS packets containing the metadata each have a different value of the TS priority flag from TS packets containing the sub-view pictures.

A system comprising a recording medium and a playback device for playing back video images from the recording medium, wherein

• a main-view video stream, a sub-view video stream, and a graphics stream are recorded on the recording medium,
• the main-view video stream includes main-view pictures constituting main views of stereoscopic video images,
• the sub-view video stream includes sub-view pictures and metadata, the sub-view pictures constituting sub-views of stereoscopic video images,
• the graphics stream includes graphics data constituting monoscopic graphics images,
• the main-view pictures are each rendered on a main-view video plane when being played back,
• the sub-view pictures are each rendered on a sub-view video plane when being played back,
• the graphics data is rendered on a graphics plane when being played back,
• the metadata is provided in each group of pictures (GOP) constituting the sub-view video stream and includes offset information,
• the offset information is control information specifying offset control,
• the offset control is a process to provide a left offset and a right offset for horizontal coordinates in the graphics plane to generate a pair of graphics planes, and then combine the pair of graphics planes separately with the main-view video plane and the sub-view video plane,
• the sub-view video stream is multiplexed in a transport stream (TS),
• TS packets constituting the TS each have a header including a TS priority flag that indicates a priority of the TS packet, and
• TS packets containing the metadata have a different value of the TS priority flag from TS packets containing the sub-view pictures,
• the playback device comprising:
• a reading unit operable to read stream data from the recording medium;
• a decoding unit operable to decode the stream data read by the reading unit into at least either of video planes and graphics planes;
• a TS priority filter unit operable to monitor the TS priority flags of the TS packets included in the stream data, and extract the TS packets containing the metadata;
• a metadata processing unit operable to extract the metadata from the TS packets extracted by the TS priority filter unit;
• and
• a plane combining unit operable to perform offset control onto the graphics plane in accordance with the offset information included in the metadata extracted by the metadata processing unit.

A non-transitory recording medium comprising:

• a main-view video stream used to provide a plurality of main-views of a plurality of stereoscopic video images, a decoded main-view video stream being presented on a main-view video plane;
• a sub-view video stream used to provide a plurality of sub-views of the plurality of stereoscopic video images, a decoded sub-view video stream being presented on a sub-view video plane;
• and
• a graphics stream used to provide a plurality of graphics images, a decoded graphics stream being presented on a graphics plane,
• wherein the sub-view video stream is multiplexed in a transport stream, a plurality of transport packets being formed from the transport stream,
• wherein each of the plurality of transport packets has information indicating whether the transport packet contains offset information,
• wherein the sub-view video stream includes the offset information,
• wherein a first shifted graphics plane and a second shifted graphics plane are formed based on the graphics plane on which the decoded graphics stream is presented and the offset information,
• wherein data formed from the main-view video plane on which the decoded main-view video stream is presented and data formed from the first shifted graphics plane are overlaid, and
• wherein data formed from the sub-view video plane on which the decoded sub-view video stream is presented and data formed from the second shifted graphics plane are overlaid.

A recording method comprising:

• generating a main-view video stream used to provide a plurality of main-views of a plurality of stereoscopic video images, a decoded main-view video stream being presented on a main-view video plane;
• generating a sub-view video stream used to provide a plurality of sub-views of the plurality of stereoscopic video images, a decoded sub-view video stream being presented on a sub-view video plane;
• generating a graphics stream used to provide a plurality of graphics images, a decoded graphics stream being presented on a graphics plane;
• and
• recording the generated main-view video stream, the generated sub-view video stream, and the generated graphics stream onto a non-transitory recording medium,
• wherein the sub-view video stream is multiplexed in a transport stream, a plurality of transport packets being formed from the transport stream,
• wherein each of the plurality of transport packets has information indicating whether the transport packet contains offset information,
• wherein the sub-view video stream includes the offset information,
• wherein a first shifted graphics plane and a second shifted graphics plane are formed based on the graphics plane on which the decoded graphics stream is presented and the offset information,
• wherein data formed from the main-view video plane on which the decoded main-view video stream is presented and data formed from the first shifted graphics plane are overlaid, and
• wherein data formed from the sub-view video plane on which the decoded sub-view video stream is presented and data formed from the second shifted graphics plane are overlaid.