Digital Signal Processing Pioneer Bede Liu Dies At 91

Bede Liu, a digital signal processing pioneer, died on 7 May. He was 91.Liu was widely regarded as one of the founders of modern digital signal processing, a field that applies mathematical algorithms to analyze, modify, and transmit signals including sound, images, and video.The IEEE Life Fellow taught electrical engineering at Princeton for more than 50 years. From 1994 to 1997, he chaired the university’s electrical and computer engineering department.Liu’s research aided the transition from