| 摘要 |
<p>PURPOSE:To execute scanning line interpolation after speed conversion without need of an additional movement detecting speed converting circuit by time duplexing a time compressed movement detecting signal with a time compressed color signal, separating them individually after their speed conversion, then time elongate them to obtain speed converted color signal and movement detecting signal. CONSTITUTION:A brightness signal (Y) and the color signal (C) which are separated from each other by an in-field Y/C separating circuit 31 and an inter-frame Y/C separating circuit 32 are mixed by a mixer 33 at a specific proportion. The C-signal and a 4-bit movement detecting signal MD2 from a movement detecting circuit 5 are inputted to an encoder 91 and time-duplexed. The speed of the output from the encoder 91 is doubled by a speed converting circuit 93, and is inputted to a decoder 92 at a clock rate of 8fsc. The output from the circuit 92 is inputted to a terminal 921, and supplied to latch circuits 922 and 927. The high order 4 bits and the low-order 4 bits in the latch circuit 927 are parallel/serial converted by a latch circuit 928, and become a time- elongated movement detecting 4-bit signal MD2 of a rate 4fsc.</p> |
