| 摘要 |
In transmitting, on a transmission side, a laterally long image whose aspect ratio is different from a usual television screen having aspect ratio of 3:4, with a top and a bottom portions of the screen being image-free, auxiliary signal obtained by shifting a signal component corresponding to a different in frequency band determined by the number of scan lines corresponding to a height of the image and a signal component exceeding a horizontal frequency band determined by a luster line length to lower frequency sides, respectively, are inserted into the image-free portions, which are used in a receiving side. In the receiving side, the auxiliary signals are separated in time from the image signal and processed separately.
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