| 摘要 |
The invention relates to a system for giving an audio-visual presentation consisting of a basic part and at least a complementary part, such as a video film. The system comprises different storage media for storing the basic part and the complementary pan and merging means for merging the basic part with the complementary part into the audio-visual presentation. The complementary part is intended for enhancing the audio-visual presentation quality that can be achieved with the basic part. A provider may provide a basic part free of charge on a CD-i disc, after which the user is to pay for the complementary pan which may be transmitted to him via a telephone line from a databank. |
