1. Rec. 601—the origins of the 4:2:2 DTV standard;Wood,2005
2. The dawn of digital photography—megapixel;Sasson
3. Coding for a viewdata ‘picture in picture facility’;Nicol,1979
4. What kind of pictures for videotex;Clarke,1980
5. Transmission techniques for picture viewdata;Nicol,1980