| 摘要 |
An image signal magnifying apparatus is provided with a subtitle processing circuit capable of automatically detecting subtitles and moving the detected subtitle to a lower portion of a picture screen of an image display unit, when an image signal of a movie or the like, displayed on a picture screen having an aspect ratio of 4 to 3, is magnified to a picture screen having an aspect ratio of 16 to 9. Improvement of image quality of the characters of the subtitles after magnification of the image and simplification of the subtitle processing operation are attained. An output of a subtitle processing circuit 6 and an output of a number-of-scanning-line conversion circuit 9 are combined by a combining circuit 8. The image signal magnified by the number-of-scanning-line conversion circuit 9 and a subtitle processing signal, which is not subjected to conversion of the number of scanning lines are combined, so that the image quality of the characters of the subtitle, in the case where the image is magnified, can be improved. Further, a control signal establishing circuit 7, for automatically generating control signals required for the subtitle processing operation is provided, so that simplification of the subtitle processing operation can be attained.
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