| 摘要 |
A display apparatus comprising a field frequency converter for converting the field frequency of a parent-picture video signal; an aspect ratio converter for converting the aspect ratio of the video signal after the field frequency conversion; a child-picture processor for generating a child-picture video signal; and a switch for synthesizing the aspect-converted video signal with the video signal obtained from the child-picture processor. In one embodiment, the storage capacity of a memory required in the field frequency converter can be minimized. The apparatus further comprises a selector for selecting either the parent-picture video signal of the second aspect ratio or the parent-picture video signal of the first aspect ratio which has been converted to the second aspect ratio, wherein merely one switch is sufficient for synthesizing the video signal obtained from the child-picture processor with the selected parent-picture video signal of the second aspect ratio.
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