00270nam a2200109Ia 450000500170000000800410001708200200005810000200007824500300009826000230012830000090015120260205054236.0260111s9999||||xx |||||||||||||| ||und||  a621.3822  Sa34D  aSalivahanan , S 0aDigital signal processing  bMc graw hillc2003  a808p