Patent ID: 7924522

Claim:
An error symbol detecting apparatus comprising: an equalizer to equalize a signal transmitted to a channel using a channel equalization characteristic that is suitable for a corresponding system; a data detector to detect data from a signal output from the equalizer; a modeling tool having a same characteristic as a partial response (PR) target polynomial applied to the system with respect to the signal transmitted to the channel; a correlation evaluation information generating unit to generate correlation evaluation information based on a correlation degree between the signal output of the equalizer and a target output of the modeling tool; and an error symbol determination unit to determine an order of probability of error generation of one or more symbols based on the correlation evaluation information, and to determine a predetermined number of symbols having a high probability of generating one or more errors corresponding to the order of probability of error generation as one or more error generating symbols, the error symbol determination unit having: a serial-parallel transducer to output the correlation evaluation information of the symbol unit generated by the correlation evaluation information generating unit in a sector unit in parallel; a comparator to determine the order of the probability of error generation of the one or more symbols according to a magnitude of the correlation evaluation information output from the serial-parallel transducer; and an error symbol determiner to determine the predetermined number of symbols as the one or more error symbols according to the order of the probability of error generation of the one or more symbols, and to output the determination result to an error correction decoder; wherein the equalizer comprises a FIR filter.