A video still player enhances its picture display capability by buffering a vulnerable channel through which viewer instructions enter the player. Ordinary viewer instructions pass over a relatively direct input channel linking a keyboard and a remote storage device, but one nonetheless defined and safeguarded...http://www.google.com.au/patents/US4796099?utm_source=gb-gplus-sharePatent US4796099 - Video still player with internal capability for executing externally-generated viewing programs
