Apparatus for storing and comparing PID to speed up detection of PID and its method

摘要

An apparatus for storing and comparing PIDs (Packet Identifiers) is disclosed which comprises a plurality of PID storing units for separately storing portions of PIDs in groups of 2 or more bits, a plurality of PID receiving and storing units for storing a PID of a current received packet, a plurality of comparing units for comparing the PIDs stored in the plurality of PID receiving and storing units with the PID stored in the plurality of PID storing units, and a control unit for determining whether comparison between the PID portions stored in the plurality of PID receiving and storing units and the PIDs stored in the plurality of PID storing unit are all matched and for generating a PID match signal or a PID mismatch signal.