Recording medium, playback device, integrated circuit
View Patent ↗A base-view video stream and a dependent-view video stream are recorded on a BD-ROM. The base-view video stream includes picture data constituting a base view of a stereoscopic image. The dependent-view video stream includes offset metadata and picture data constituting a dependent view of the stereoscopic image. The offset metadata includes an offset sequence that defines an offset control of a plane memory when a graphics to be overlaid with the picture data is played back in a one-plane offset mode.
1. A receiving device for receiving data transmitted via a broadcast or via a network,
wherein the data includes a main-view video stream, a sub-view video stream, and a graphics stream,
the main-view video stream includes picture data of a main view of a stereoscopic image,
the sub-view video stream includes metadata and picture data of a sub view of the stereoscopic image,
a plurality of pieces of picture data included in the main-view video stream and a plurality of pieces of picture data included in the sub-view video stream are grouped into one or more groups of pictures,
the metadata is composed of a plurality of parameter sequences, each of which is composed of a plurality of pieces of frame-specific control information that respectively correspond to a plurality of frames in a group of pictures,
each piece of frame-specific control information defines an offset control that applies offsets of leftward and rightward directions to horizontal coordinates in the graphics data when the graphics data is overlaid with the picture data of the main view and the picture data of the sub view,
the graphics stream includes graphics data, and
the receiving device comprises:
a video decoder operable to obtain the picture data of the main view and the picture data of the sub view by decoding the main-view video stream and the sub-view video stream;
a graphics decoder operable to obtain the graphics data by decoding the graphics stream; and
an overlay unit operable to overlay the graphics data with the picture data of the main view and the picture data of the sub view,
wherein when frames included in a group of pictures are played back, the overlay unit overlays the graphics data with the picture data of the main view and the picture data of the sub view that belong to the respective frames by applying offsets of leftward and rightward directions to the horizontal coordinates in the graphics data in accordance with pieces of frame-specific control information corresponding to the respective frames.
2. The receiving device of claim 1 , wherein
the control information further includes information that defines directions of the offsets to be applied to the graphics data, and
the overlay unit overlays the graphics data with the picture data of the main view and the picture data of the sub view by applying offsets of leftward and rightward directions to the horizontal coordinates in the graphics data in accordance with the control information.