00290nam a2200109 a 450000500170000002000150001708200200003210000430005224500300009526000400012530000150016520251203091848.0  a8120305329  a001.64,bD, opp  aOppenheim, Alan V., Schafer, Ronald W.  aDigital signal processing  aDelhibPrentice-Hall of Indiac1994  a586p, 22cm