History and some applications of digital signal processing
Bernard Gold · The Journal of the Acoustical Society of America · 1983
Digital signal processing started to become a discipline about 20 years ago, although its roots go much further back. The spark that generated the ensuing great activity was the realization that digital computer technology was on the verge of great leaps forward in both speed and miniaturization. This made it possible to predict that traditional analog processing devices such as filters and spectrum analyzers would become digital and result in big improvements for many applications. Acoustic signals such as speech, seismic, and sonar signals were prime candidates for digital processing because of their relatively low bandwidths. A brief history will be presented of the development of this field, and its subsequent inclusion in electrical engineering curricula. Controversy still exists on how this new entry should be treated academically, and that subject will be discussed. Several applications to the field of speech communications will be considered and a series of audio recordings will be played to help illuminate these applications. [Work sponsored by Department of the Air Force.]