Playback device, integrated circuit, recording medium

Abstract

Playback device for playing back graphics stream according to stream selection table recorded on recording medium. Stream number register stores, as current stream number, one of a plurality of stream numbers written in the stream selection table. Capability register indicates capability to play back graphics. Procedure means determines playback type of graphics corresponding to the current stream number, based on the playback capability indicated by the capability register. Playback of graphics streams falls into two types: first playback type in which a monoscopic graphics stream is used; and second playback type in which a pair of left-eye graphics stream and right-eye graphics stream is used to perform a stereoscopic playback. The capability register indicates whether capability to perform the stereoscopic playback using the pair of left-eye and right-eye graphics streams is present in graphics decoder.

1 . A semiconductor integrated circuit loaded in a playback device for playing back stream data which includes a main-view video stream to be used for playback of a monoscopic image, a sub-view video stream to be used, in combination with the main-view video stream, for playback of a stereoscopic image, a graphics stream, and an identification flag, wherein
 the main-view video stream is multiplexed as a main-view transport stream and then divided into a plurality of main-view data groups,   the sub-view video stream is multiplexed as a sub-view transport stream 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 stream data,   the graphics stream is multiplexed into either or both of the main-view transport stream and the sub-view transport stream, and at least one of the main-view data groups and the sub-view data groups include graphics data, playback of the graphics stream includes a process of selecting a playback type of the graphics stream from a first playback type and a second playback type, the first playback type using the graphics stream as a monoscopic graphics stream, and the second playback type realizing a stereoscopic display by using a pair of left-eye graphics stream and right-eye graphics stream,   the identification flag indicates whether or not there is a pair of left-eye graphics stream and right-eye graphics stream in the graphics stream in the stereoscopic playback mode,   the semiconductor integrated circuit comprises:   a main control unit operable to control the semiconductor integrated circuit;   a stream processing unit operable to receive the stream data, store the received stream data temporarily into a memory provided inside or outside the semiconductor integrated circuit, and demultiplex the stream data into video data and graphics data;   a signal processing unit operable to decode the video data and the graphics data to generate decoded video data and decoded graphics data; and   an AV output unit operable to output the decoded video data, wherein   the stream processing unit includes   a switch sub-unit operable to switch between a first area and a second area in the memory to store the received stream data therein,   the main control unit controls the switch sub-unit to store data belonging to the main-view data groups into the first area, and to store data belonging to the sub-view data groups into the second area,   a third area in the memory stores information that indicates whether or not a capability to perform the stereoscopic playback by using the pair of left-eye graphics stream and right-eye graphics stream is present in the playback device,   the main control unit selects a playback type for playback of the graphics stream, in accordance with the identification flag and the information that indicates whether or not a capability to perform the stereoscopic playback by using the pair of left-eye graphics stream and right-eye graphics stream is present in the playback device, and   the AV output unit superimposes the decoded video data with the decoded graphics data in accordance with the selected playback type, and outputs data in which the decoded video data is superimposed with the decoded graphics data.