| 摘要 |
PURPOSE:To enable conversion into a television system such as standard system based on information at a receiving side by transmitting information as screen frame shape, conversion area location, expansion ratio, compression ratio, etc., which are needed to convert into said signals such as the standard system by a means for superposing the above-mentioned information during a blanking period of a high-accuracy television system signals. CONSTITUTION:A control signal extraction circuit 25 extracts a control signal for controlling a conversion mode, expansion ratio, etc., from the horizontal or vertical blanking period of an input signal, a signal process circuit 27 performs arithmetic from numerical picture elements for correction, and converts them into less picture elements to perform conversion of the number of scan lines in the same way. This method stores pictures of one frame portion of the converted standard television system by a frame memory 30 and writes in by a line memory 26 using an address signal generated from a memory control 31 to read out said pictures. |
