| 摘要 |
<p>A system for the development and reception of locally interactive television and radio programmes. The system involves the creation of multiple programme sub-steams which can be selectively presented to the viewer in response to choices previously made by the viewer and logged by the viewers' receiving equipment. The interactivity is completely local so the data downloaded during the broadcast is all that is required to provide the viewer with all the alternative programme sub-streams. This system is suitable for all digital broadcasting systems. Background images (14) are distributed together with image groups (20, 27) which may be combined selectively with the background images to form separate programme sub-streams. The image groups may be distributed in the video stream or in the accompanying user/private data stream. The image groups may be selected for inclusion in one or more programme sub-streams.</p> |
