Signals and Signal Processing: The Invisibles and the Everlastings [From the Editor]

When you receive this issue of IEEE Signal Processing Magazine, a symposium, “The Future of Signal Processing,” was just held at the Massachusetts Institute of Technology (MIT). The symposium honored the career of Prof. Alan Oppenheim as one of the pioneers in signal processing research and education. Attendees from various organizations around the world discussed and shared insights of the profound roles that signal processing have played and envisioned the future trends of signal processing.