| 摘要 |
<p>PURPOSE:To improve the signal transmission efficiency and to simplify the control circuit by constituting a receiver with a reception circuit, the 3rd picture memory, the 3rd operation control circuit and a picture display means. CONSTITUTION:A consecutive O data and an added picture data sent from a transmitter A are demodulated by a demodulation circuit 11 of a reception circuit 23 of a receiver B and the result is sent to a reception control circuit 13. When the reception control circuit 13 receives the consecutive O data being a signal representing no change, the 3rd operation control circuit 25 avoids revision of the 3rd picture data and skips the picture data of the picture element of the 3rd picture memory 24 by the number of consecutive Os. On the other hand, an addition picture data being the picture data of the picture element of the changed part is received, a prescribed value '1' is subtracted from the added picture data by the 3rd operation control circuit 25 to recover the picture data of the picture element of the changed part, and the recovered picture data revises the picture data of the 3rd picture memory 24. A transmission picture sent this time is displayed on a picture display means 18.</p> |
