Patent ID: 8144249
Filing Date: 2012-03-27
Classification: H04N

Abstract:
1. A multi-slicing horizontal synchronization signal generating apparatus, comprising: a slicer, performing edge detection on a video signal having a first horizontal synchronization, so as to generate a first detection signal and a second detection signal according to a first voltage level and a second voltage level, respectively; a numerically controlled oscillator (NCO), for generating a second horizontal synchronization signal; a first phase detector, coupled to the slicer and the NCO, for detecting a first phase difference between the first detection signal and the second horizontal synchronization signal; a second phase detector, coupled to the slicer and the NCO, for detecting a second phase difference between the second detection signal and a reference time point corresponding to a reference value reached by an NCO counter value of the NCO; and a calibration circuit, coupled to the first phase detector, the second phase detector and the NCO, for generating a calibration signal according to the first phase difference and the second phase difference; wherein, the NCO adaptively adjusts a phase of the second horizontal synchronization signal according to the calibration signal.