| 摘要 |
PURPOSE:To monitor the up-to-date picture information efficiently, by displaying the new picture information on a screen automatically at every update of the contents of the screen of transmitted added information. CONSTITUTION:A clock generating circuit 9 generates a clock signal to sample an added picture information signal superposed to a received television signal and a picture information signal corresponding to one picture is stored in a main memory 12. An output read out from the main memory 12 and an output from a chroma video processing circuit 4 are applied to a cathode ray tube 14 through a mixing/switching circuit 13. An R/W processing circuit 10 displays the picture of new picture information automatically for a fixed period in every updating of the contents of the transmitted adding picture information. |
