ThisisthehardcovereditionofSmith'sclassicbook.Itisalsoavailableinsoftcoverunderthetitle:"DigitalSignalProcessing:AGuideforEngineersandScientists."Thesoftcoverversionisslightlylessexpensive,whilethehardcovereditioncontainsanadditional23pagestudyguidetohelpnewcomerstoDSP.