Before revision: In 1980, the first stand-alone, complete DSPs – Nippon Electric Corporation's NEC µPD7720 and AT&T's DSP1 – were presented at the International Solid-State Circuits Conference '80.
After revision: based on the modified Harvard architectureIn 1980, the first stand-alone, complete DSPs – Nippon Electric Corporation's NEC µPD7720 and AT&T's DSP1 – were presented at the International Solid-State Circuits Conference '80.