HORIZONTAL SYNCHRONIZATION GENERATION CIRCUIT, VIDEO SIGNAL PROCESSING LSI, AND VIDEO SYSTEM

摘要

A horizontal synchronization generation circuit, which generates a horizontal synchronizing signal from a given reference clock, enables accurate reproduction of a preferable frame frequency with a simple configuration. A clock counter counts the reference clock. A comparator generates the horizontal synchronizing signal at a time when a count value output from the clock counter becomes equal to a synchronization counter value. A synchronization counter value output section generates the synchronization counter value by performing addition/subtraction in each of scanning lines based on a basic counter value.