HARDWARE MINIMIZATION OFVIDEOTEXORTELETEXTDECODERS BYEXPLOITATION OFDISPLAYREDUNDANCY

The paper showshow, at the variouslevelsof broadcastTeletextor InteractiveVideotexservice, the naturalredundancyinherentin the displayhas been exploitedso thatusefulsavingscan be made in the receivingterminals. Thesesavingsmanifest themselvesas simplificationsin displaychip architectureand as a reductionin the quantityof DisplayRAM necessaryto achievea given standardof display. The resultingterminalcostreductioncan only improvethe generalacceptanceof a givenlevel of service. The conceptof cost reductionby exploitationof displayredundancycan readilybe extendedfrombasic Alpha-Mosaicand 'Alpha-DRCS'to Alpha-Geometric terminalsand the paperconcludesby showinghow with minormodificationsthis redundancycan be exploited in sucha way as to reversethe presentdivergenceof conceptbetweenAlpha-Geometricand Alpha-DRCS. terminals.