This book provides a description of digital signal processing (DSP) algorithms along with a coverage of compelling modern applications including cellular telephones and MP3 players. Topics covered include filter design, FFT, random signals, adaptive filters, and speech/audio processing. The mathematical underpinnings of DSP are accompanied by qualitative descriptions, solved problems, interactive computer simulations, and Java graphics. The presentation of signal processing concepts is enhanced with object-oriented programming examples supported by the universally accessible Java-DSP (J-DSP) and its mobile versions. The second edition has several new topics including 2-d image filtering, recent speech and audio processing algorithms, and new applications. This new edition has a support web site with code and video clips for J-DSP, iOS, Android and MATLAB. More than 100 new exercises added. The book can be used in an undergraduate or graduate DSP course. ISBN 978-1-4675-9892-7