1. In display apparatus having a display medium and a stream of digital information in the form of data bytes coupled to said medium by means including one of plural decoder means to effect display of visually perceptible indicia at locations on said medium, the method of decoding said data bytes comprising: the step of detecting the locations within said medium at which said indicia are to be displayed, and the further step of using said location as a control to direct a said byte to said one decoder means if said byte relates to a given position on said medium and in the alternative to a different one of said plural decoder means if said byte relates to a different position on said medium. whereby the byte is used to cause display of corresponding visual data as determined by said one decoder means or not according to said position.