Recording medium, playback device, and integrated circuit

1. A semiconductor integrated circuit for receiving a series of data including a main-view video stream, a sub-view video stream, and a graphics stream, and then performing video signal processing on the received data, wherein

the main-view video stream includes picture data constituting main views of stereoscopic video images,

the sub-view video stream includes picture data and metadata, the picture data constituting sub-views of stereoscopic video images,

the graphics stream includes graphics data constituting monoscopic graphics images,

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 for a plurality of pictures constituting a GOP,

the main-view video stream is multiplexed into a main-view transport stream (TS), and then divided into a plurality of main-view data groups,

the sub-view video stream is multiplexed into a sub-view TS, and then divided into a plurality of sub-view data groups,

the main-view data groups and the sub-view data groups are arranged in an interleaved manner in the series of data,

the graphics stream is multiplexed in either or both of the main-view TS and the sub-view TS, and at least one of the main-view data groups and the sub-view data groups include the graphics data,

TS packets constituting the sub-view 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 TS priority flag from TS packets containing picture data constituting the sub-views,

the semiconductor integrated circuit comprising:

a main control unit operable to control the semiconductor integrated circuit;

a stream processing unit operable to receive the series of data, temporarily store the series of data into a memory internal or external to the semiconductor integrated circuit, and then demultiplex the series of data into the picture data and the graphics data;

a signal processing unit operable to decode the picture data and the graphics data; and

an AV output unit operable to output the picture data decoded by the signal processing unit, wherein

the stream processing unit comprises a switching unit operable to receive the series of data and switch a storage location thereof between a first area and a second area in the memory,

the main control unit controls the switching unit to store picture data belonging to the main-view data groups and the sub-view data groups in the first area and the second area, respectively,

among the picture data decoded, data belonging to the main-view data groups is stored into a third area in the memory, the third area corresponding to a main-view video plane,

among the picture data decoded, data belonging to the sub-view data groups is stored into a fourth area in the memory, the fourth area corresponding to a sub-view video plane,

the graphics data decoded is stored into a fifth area in the memory, the fifth area corresponding to a graphics plane,

the AV output unit comprises an image superimposing unit operable to superimpose one of the graphics data decoded and the picture data decoded on the other,

the signal processing unit monitors TS priority flags of TS packets included in the series of data, and extracts the metadata,

the image superimposing unit provides a positive offset and a negative offset for horizontal coordinates in the graphics plane to generate a pair of graphics planes according to offset information included in the metadata extracted by the signal processing unit, and then superimposes the pair of graphics planes separately on the main-view video plane and the sub-view video plane, and

the AV output unit outputs the picture data decoded after the graphics data decoded is superimposed thereon.