| 摘要 |
<p>PURPOSE:To obtain a simple and economical decoder while decreasing number of delay elements by using a horizontal period delay element in common and using this output to an input of a two-dimension filter and a 2-dimension forecast circuit. CONSTITUTION:A memory 4 is used as a delay element for one picture element share for horizontal period, a latch 7 is used as a delay element for one picture element share so as to form the circuitry to be the delay element for one horizontal period in total. Then outputs of the memory 4 and the latch 7 are led out, a coefficient is multiplied respectively to them and the sum is obtained at product sum circuits 8, 9 so as to attain forecast operation. In using the delay element and the latch in common properly in this way, a forecast circuit and a filter are constituted, a forecast output is obtained from an output terminal 5 and a filter output is obtained from an output terminal 6.</p> |
