Communications/solid state: `Chipping in¿ to digital telephones: Integrated-circuit chips that convert voice to digits may someday be in every telephone handset
Howard Falk · IEEE Spectrum · 1977
Monolithic IC chips, codecs (coder-decoders), that convert voice to digital signals are now being designed and marketed, and use of these chips on a massive scale in telephone equipment and systems is imminent. The features and applications of the chips are given.