| 摘要 |
The invention provides a clock frequency generator for the use of converting the format of the video signal, which generates a clock of an unified frequency, in order to obtain the horizontal and the vertical synchronizing signals for the video signal after the format conversion without changing the field frequency and the scanning lines of the standard video signal. By using the clock generated by multiplying by a factor of 4740 the horizontal synchronizing signal for the SD format interlace scanning signal in the first multiplier (0009) and the second multiplier (0003), the horizontal synchronizing signal for the HD format interlace scanning signal is generated from the output terminal (0007) and the vertical synchronizing signal for the HD format interlace scanning signal is generated from the output terminal (0008) without changing the standard number of the scanning lines and the field frequency.
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