Patent ID: 8749709

Claim:
A video receiver configured for receiving a digital video signal comprising a vertical synchronization signal, a horizontal synchronization signal and a data enable signal and comprising: (a) a detection circuit configured for: (i) measuring a measured total horizontal pixels, a measured total vertical scan lines, a measured active horizontal pixels and a measured active vertical scan lines, (ii) estimating an expected total horizontal pixels, an expected total vertical scan lines, an expected active horizontal pixels and an expected active vertical scan lines, (iii) determining whether the magnitude of the difference between the expected total vertical scan lines and the measured total vertical scan lines falls within a first range defined by a first threshold and a second threshold, (iv) determining whether the magnitude of the difference between the expected total horizontal pixels and the measured total horizontal pixels falls within a second range defined by a third threshold and a fourth threshold, (v) determining whether the magnitude of the difference between the expected active horizontal pixels and the measured active horizontal pixels falls within a third range defined by a fifth threshold and a sixth threshold, and (vi) determining whether the magnitude of the difference between the expected active vertical scan lines and measured active vertical scan lines falls within a fourth range defined by a seventh threshold and an eighth threshold; (b) a vertical synchronization correction circuit configured for correcting the vertical synchronization signal if the magnitude of the difference between the expected total vertical scan lines and the measured total vertical scan lines is within the first range; (c) a horizontal synchronization correction circuit configured for correcting the horizontal synchronization signal if the magnitude of the difference between the expected total horizontal pixels and the measured total horizontal pixels is within the second range; and (d) a data enable correction circuit configured for correcting the data enable signal if the magnitude of the difference between the expected active vertical scan lines and the measured active vertical scan lines is within the third range or the magnitude of the difference between the expected active horizontal pixels and the measured active horizontal pixels is within the fourth range.