A magnetic disc has a plurality of video track segments for storing distinct fields of video information. A look-up track is provided on the disc and segmented to store indirect address data which may be represented by random numbers, and which are related to the video information fields. Both the look-up...http://www.google.es/patents/US4000510?utm_source=gb-gplus-sharePatente US4000510 - System for storage and retrieval of video information on a cyclical storage device
System for storage and retrieval of video information on a cyclical storage ...