초록 ▼

A clock pulse generator has a first clock pulse generator for generating a burst lock clock pulse signal synchronized with a color burst signal contained in a video signal; a second clock pulse generator for generating a line lock clock pulse signal synchronized with a horizontal synchronizing signa

A clock pulse generator has a first clock pulse generator for generating a burst lock clock pulse signal synchronized with a color burst signal contained in a video signal; a second clock pulse generator for generating a line lock clock pulse signal synchronized with a horizontal synchronizing signal contained in the video signal; a detection circuit for detecting whether or not the video signal is a standard signal; and a phase control circuit for synchronizing the phase of the line lock clock pulse signal with the phase of the burst lock clock pulse signal when the detection circuit determines that the video signal is a standard signal. The line lock clock pulse signal is supplied to a synchronizing signal generator, a selected one of the burst lock clock pulse signal and the line lock clock pulse signal is supplied to a signal processing circuit when the detection circuit determines that the video signal is a standard signal, and the line lock clock pulse signal is supplied to the signal processing circuit when the detection circuit determines that the video signal is a non-standard signal.

대표청구항 ▼

A clock pulse generator comprising: a first clock pulse generating means for generating a first clock pulse signal synchronized with a color burst signal contained in a video signal; a second clock pulse generating means for generating a second clock pulse signal synchronized with a horizontal synch

A clock pulse generator comprising: a first clock pulse generating means for generating a first clock pulse signal synchronized with a color burst signal contained in a video signal; a second clock pulse generating means for generating a second clock pulse signal synchronized with a horizontal synchronizing signal contained in said video signal; a detection means for detecting whether said video signal accords with a predetermined standard or not; a phase control means for synchronizing the phase of said second clock pulse signal with the phase of said first clock pulse signal when said detection means makes a decision that said video signal accords with said standard; a selection means supplied with said first and second clock pulse signals and for selecting one of said first and second clock pulse signals in accordance with the result of the detection through said detection means; and said second clock pulse signal being supplied to a synchronizing signal generating means to make said synchronizing signal generating means generate a synchronizing signal based on said second clock pulse signal, the selected clock pulse signal being supplied from said selection means to a signal processing circuit to make said signal processing circuit perform signal processing upon said video signal based on said selected clock pulse signal.