Interactive Techniques for Producing and Encoding Color Graphics
The Video Response System (VRS) with which the Nippon Telegraph and Telephone Public Corporation (NTT) is now experimenting is a public visual information service using home TV sets as described by Nakajima (1977), The VRS stores visual information in a large capacity video store. The stored video information is converted into a TV signal by using a video codec and is temporarily stored in the video frame memory (Figure 1). The TV signal is read out of the video frame memory at a rate of 30 frames/sec and is transmitted to a subscriber’s video adapter through a video transmission line. Among the most important factors in the VRS is the video store and the visual information stored therein.
KeywordsLine Drawing Closed Area Picture Element Extension Code Distinction Code
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