摘要 |
Disclosed is a system for generating a content presentation signal such as an audiovisual signal. A content source ( 203 ), such as a Digital Versatile Disc (DVD) comprises a plurality of content data streams ( 301, 303, 305, 307 ). The content source ( 203 ) further comprises a virtual content stream ( 309 ) comprising content data pointers to the content data of the plurality of content data streams ( 301, 303, 305, 307 ). An apparatus ( 200 ) comprises an interface ( 201 ) for the content source and a virtual content stream processor ( 205 ) which retrieves the virtual content stream ( 309 ) through the interface ( 201 ) and stores it in memory ( 207 ). A data pointer processor ( 209 ) selects data pointers in response to a presentation criterion, such as a desired quality or data bandwidth of the interface ( 201 ). A presentation signal processor ( 211 ) generates a content presentation signal by retrieving the content data of the plurality of content data streams pointed to by the content data pointers. |