| 摘要 |
PURPOSE:To perform a fast and highly accurate interpolation processing at a high speed by providing a memory to output a desired reference data to be added to a read-only memory as address and a time data from a position of the reference data to a position at which interpolation is to be made. CONSTITUTION:A control signal generation circuit 3 outputs a control signal S1 to a data latch circuit 2 based on a horizontal synchronization signal and a clock signal, outputs a signal S2 to a read-only-memory 4 and then, outputs a signal S3 to a data output control circuit 5. The circuit 2 outputs a part D1 of a sample data latched according to the signal S1 to the memory 4 and outputs a part D2 thereof to the circuit 5 and the memory 4 outputs a data D3 corresponding to an address to the circuit 5. The circuit 5 outputs the data D2 to be inputted from the circuit 2 according to the signal S3 to a display device 6 and outputs a data D3 to be inputted from the memory 4 to the display device 6. Thus, fast and high accurate interpolation processing can be performed with a simple construction. |
