A great number of scientists in European research institutions is involved in one or more aspects of the multidisciplinary field of signal processing. This book contains concise descriptions of the activities and interests of 379 signal processing laboratories from 17 European countries. Its purpose is twofold: to facilitate communications between institutions and individual scientists within the signal processing community - and to give an expose of the combined European signal processing research effort. This publication is the result of a survey which was made in the fall of 1983 by the European Association for Signal Processing EURASIP. EURASIP is a non-profit professional organization which aims at the improvement of communications between groups and individuals working in the field of signal processing in Europe or elsewhere, and to exchange and disseminate information in the field allover the world. EURASIP arranges workshops and conferences, e.g., the European Signal Processing Conferences EUSIPCO, and publishes the journals SIGNAL PROCESSING and SPEECH COMMUNICATION.