The HDTV workshops were established with the aim of aiding definition and fostering the introduction of HDTV. Their fundamental principle is the separation of the standardisation process from the technological development, with the workshops concentrating mainly on the latter. Over the past few years important steps towards actual implementation of HDTV have been made in the major countries. The aim of this workshop was to ask some key people in the HDTV world to express their views about the forms in which an HDTV or Advanced Television Service could be introduced or has actually been started, with the goal of identifying which areas of research are currently in most need of attention. HDTV is now considered to be a strategic piece of applied research in virtually all countries of the world and in many environments there is mounting pressure to start up service and equipment manufacturing. The papers presented in this volume constitute a key contribution to the establishment of this giant step towards a fully fledged information society. Due to the extensive length of the contents, only the number of papers presented per session is listed below.