Constraints imposed by programme content on design, delivery and use of interactive media

Systems based on digital representations of images are explored and analysed in the light of the sort of demands that interactive programmes of worthwhile complexity will place on them. By separating the processes of design from delivery, important advantages can be secured for these two quite dissimilar processes. The special advantages of analogue representations of certain types of data are highlighted and the problems of the representation of meaning are discussed in connection with the management and indexing of essential pictorial imagery. The interactive nature of programmes devised around still and moving images poses problems not usually encountered in conventional computing, and the consideration of these problems can best be carried out as an extension of human-computer interaction research