RAVI, a proposed standard for the interchange of audio/visual interactive applications

RAVI (representation for audio/visual interactive applications), a set of specifications proposed as a standard for the interchange of audio/visual interactive applications (AVIs), is presented. RAVI was designed to meet the functional requirements of an AVI. RAVI consists of an interchange format and a set of functional operators (formulation). Protocols for a RAVI system are defined to allow communication between distributed subsystems. RAVI profiles allow compatible implementation of restricted sets of functionalities. As far as possible, the RAVI specifications use existing standards and are being submitted to ISO and CCITT for discussion. Products are commercially available, and a number of applications has already been developed