| 摘要 |
PURPOSE: To prevent a picture from being reduced, even if input video signals are side panel signals or letter box signals in a plurality of pictures display or the utilization efficiency of a screen from lowering due to display of useless picture portions in a reduced picture display. CONSTITUTION: Whether an input video signal is a side panel signal, a letter box signal or a full-line signal is detected. If the input video signal is a side panel signal or a letter box signal in a plurality of picture display or a reduced picture display, only signals for effective picture regions are cut out and composited into a picture of an adjusted picture size. This prevents the picture from being reduced, even if the input video signals are side panel signals or letter box signals for a plurality of pictures display, or improves the utilization efficiency of a screen, without display-processing of useless picture portions in a reduced picture display.
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