Data segment sync detection circuit and method thereof

摘要

A circuit for detecting a data segment sync signal of data segment consisting of a plurality of symbols in a high-definition television, includes a correlator (510) for detecting a correlation value from a received data segment signal, a segment integrator (520) for accumulating the detected correlation value by segments and attenuating the accumulated correlation value in response to an overflow prevention signal, a maximum-value detector (530) for detecting a maximum accumulated correlation value in the segment from the segment integrator output, an overflow prevention circuit (540) for generating the overflow prevention signal by comparing the detected maximum accumulated correlation value with a predetermined reference value, a sync position detector (550) for detecting a symbol position having the detected maximum accumulated correlation value, and a synchronization signal generator (560) for generating a synchronization signal at the symbol position corresponding to the detected maximum accumulated correlation value. The circuit precisely detects data segment sync, by generating the maximum value among the accumulated correlation values in each data segment, even when the position of a data segment sync pulse changes due to errors in the received signal.