| 摘要 |
an error detecting unit(10) for judging error of a frame sync. signal by comparing a frame sync. input signal(FSYNC) with a reference signal(T2H) whose period is one line data length of a HDTV; a counter unit for counting a period of one frame video signal with an initial loading data among the frame sync. input signals(FSYNC) coming from an error detecting unit(10); and a frame sync. recovering unit for producing a frame sync. signal(FSYNC) after being enabled by an output(QD) signal of the counter unit(20), thereby improving a picture quality.
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