| 摘要 |
PURPOSE:To reduce the number of parts used and to simplify the coding circuit, by generating a line synchronizing signal code at the same circuit as the circuit for make-up and terminating code. CONSTITUTION:When a line synchronizing signal EOL receives with a load shift control circuit 19, a clear signal is transmitted to a run length counter 10 and a color control circuit 18, a counter value is taken as 0, and values A0-A6 and A7 of ROMs 11, 12 are taken as 0. On the other hand, the value A8 of the ROM11 is taken as 1 at the transmission of the signal EOL, the address is taken as 2<8>=128, and the signal EOL is outputted from the rom 11 or 12. The EOL signal is read out from the ROMs 11 (for TC) and 12 (for MC) for the terminating and makeup codes TC, MC and loaded to shift registers 13, 14. The color inversion signal is transmitted to a circuit 18 with the changing point detection from a circuit 19 and shift clocks for TC and MC and a load signal are transmitted to the registers 13, 14, and the code train of the TC, MC and EOL is transmitted from an EOL generating circuit 21. |
