| 摘要 |
PURPOSE:To enjoy a video by a wide video signal on a television receiver whose aspect ratio is 4:3 by differentiating clocks at memory write and readout so as to apply time axis expansion thereby varying a video part to be eliminated. CONSTITUTION:The device is provided with a horizontal synchronizing signal separator circuit 1, a clock generating circuit 2, a movement detector 3, an A/D converter 4, a memory control circuit 5, a memory 6, a clock generating circuit 7 and a D/A converter 8. Then the recording and reproducing device uses the movement detector 3 to select a video signal to be eliminated from a wide video signal and time axis expansion is applied by differentiating the clock at write and readout of the memory with respect to the video signal not to be eliminated so as to apply time axis expansion thereby converting the aspect ratio of the wide video signal to 4:3. Thus, a wide video broadcast is enjoyed without any feel of unnaturality by the television receiver whose aspect ratio is 4:3. |
