Digital video transmission at 34 Mbit/s using bit rate reduction techniques
P. Dalleur, A. Avau, P. Delogne · Digital Access to Libraries (Université catholique de Louvain (UCL), l'Université de Namur (UNamur) and the Université Saint-Louis (USL-B)) · 1984
Describes the basic principles of a digital television system which has been designed and implemented at the Telecommunication and Microwaves Laboratory of the Universite Catholique de Louvain. The aim of this system was to reach bit rates of the order of 34 Mbit/s. To achieve this, the system uses component coding, expands the signal by removing horizontal blanks, and carries out a combined interframe interpolation and Hadamard transform which roughly equals the vertical and horizontal resolutions. After bit allocation, the signal is converted into a serial stream of data and transmitted. The inverse operations are made at the receiver, where a 625 lines picture is restored. Those principles were implemented and experimented on a transmission via OTS Satellite. Prospects discussed include several sound channels and teletext capabilities and improvements with use of a reduced frame memory.