| 摘要 |
Disclosed is a frame synchronizer 10 capable of suppressing the generation of a jaggy phenomenon without deteriorating image quality. The frame synchronizer comprises a buffer memory for sequentially storing an input video data stream supplied in synchronization with a first synchronization signal, and a memory control section for reading video data from the buffer memory in synchronization with a second synchronization signal. Before a remaining capacity of the buffer memory reaches a predetermined lower limit, the memory control section reads one field of first and second fields in an area starting from a predetermined start line and reads the other field in an area starting from a predetermined first start line, the first field containing pixel data on even number lines of each frame, and the second field containing pixel data on odd number lines of each frame. When the remaining capacity of the buffer memory reaches the predetermined lower limit, the memory control section reads only the other field in an area starting from a second start line that is shifted by one horizontal line from the predetermined first start line.
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