Abstract: A method and system for content management, for example for managing content-rich services such as video on demand or news-feeds, includes a content-definition schema (10) comprising a plurality of content definitions (12). The stored definitions automatically configure a user interface (26,28) for the receipt of content, as well as automatically controlling content validation which may be carried out both locally and remotely of a content provider (22). The definitions (12) may also automatically configure a content database (20) which stores the content. The content definitions (12) may be modified by means of an administrative tool (40) which allows a relatively unskilled operator (42) to select options from a list.

Abstract: A method of coding a moving picture comprising generating a first sequence of digital signals representing a set of images of a moving picture and at least one further sequence of digital signals representing a further set of images of the moving picture and writing the sequences onto a data carrier. The or each further set of images may be a subset of the first set. An interactive video system can access and transmit a sequence as requested by a consumer without further processing of the digital signals.

Abstract: A data transmission system comprising a transmit unit 2 having a buffer 22 for generating a delayed version of the transmitted data signal and the receive unit 4 comprising a buffer 47 for generating a delayed version of the received data signal, error detection means for detecting errors in the received data signal and means for signalling the transmit unit 2 to transmit the delayed version of the transmitted data signal.