| 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.
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