| 摘要 |
PURPOSE:To obtain an inclined waveform data having a good resolution, by means of a simple circuit configuration, by encoding and storing an inclined waveform data of rise-up and breaking, which should be added to a blanking signal of a video signal, and adding it to a video signal afterwards. CONSTITUTION:A video data Dc at the time of start and a video data Dgamma at the time of end in the blanking section of an encoded video signal are supplied to a ROM 23 as an address data through latching circuits 19, 20 and a multiplexer 22, respectively. From the ROM 23 are read out Data Df, Dgamma of breaking and rise-up of a blanking waveform. Inclined data of breaking and rise-up, which have been read out are supplied to a multiplexer 26, and in this multiplexer, they are compounded with an output of a delaying circuit, which is supplied through a latching circuit 25. Accordingly, as for an output of the multiplexer 26, the inclined data Df, Dgamma of blanking are added to the last part and the head part of a video data. The output of the multiplexer 26 is supplied to a D/A converter through a latching circuit 27, and is led out to the outside as an analog video signal. |
