| 摘要 |
PURPOSE:To obtain image information through a simple constitution by storing the luminance signal of a received television text broadcasting (teletext) signal in a memory, and reading and printing out the image information on a printer. CONSTITUTION:A television broadcasting signal where the teletext signal is superposed is detected by a detecting circuit 3 to obtain a composite video signal. The teletext signal in it is converted into a binary signal through a waveform equalizing circuit 4 and a slicing circuit and the signal is supplied to the pattern memory 7. On the other hand, an fsc regenerating circuit regenerates a chrominance subcarrier fsc synchronously with a color burst signal and generates a write clock by it. The luminance signal in the teletext signal is written in the memory 7 by the write clock. Further, the printer 18 and a printer interface circuit 19 are provided to print out the image information stored in the pattern memory 7. |
