The 2013th European Signal Processing Conference (EUSIPCO-2013), September 9-13, Marrakech, Morocco is the 21st of its kind organized by the European Association for Signal, Speech, and Image Processing (EURASIP). The focus will be on signal processing theory, algorithms, and applications. Papers will be accepted based on quality, relevance, and novelty and accepted papers will be published in the proceedings of EUSIPCO-2013 as well as presented at the conference.