Method and System for PC Monitor Phase Locking In Changing Content Environments

Abstract

Aspects of a method and system for PC monitor phase locking in changing content environments may include phase-locking video signals at a PC monitor signal receiver, based on locating amplitude transitions for one or more of the video signals. The amplitude transitions may be identified by comparing an amplitude difference of two or more samples with a threshold for at least one of the video signals. The two or more samples may be separated by one pixel period and the threshold may be a variable parameter. Phase-offset samples and non-phase-offset samples of the video signals may be generated by sampling at phase-offset sampling instances and non-phase-offset sampling instances, respectively. The mean normalized rate of change of the phase-offset samples and the non-phase-offset samples may be analyzed to allow locating the amplitude transitions of the video signals. The beginning of the amplitude transitions may be located by using a target index.

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