Toshitada Doi

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Toshitada Doi
Born (1943-02-02) February 2, 1943 (age 75)
Alma materTokyo Institute of Technology
Tohoku University

Toshitada Doi (土井 利忠, Doi Toshitada, born February 2, 1943) is a Japanese electrical engineer, who played a significant role in the digital audio revolution. He received a degree in electrical engineering from the Tokyo Institute of Technology in 1964, and a PhD from Tohoku University in 1972.

He joined Sony Japan in 1964 and started the first digital audio project within Sony. He was the driving force behind the PCM adaptor, and was a prominent member of the Sony/Philips taskforce responsible for the design of the Compact Disc.[1] He created, among others, the CIRC error correction system.[2] He, with Kees Immink, refutes the myth that the Compact Disc's playing time was determined by Beethoven's Ninth Symphony.[3]

He was the lead engineer of the DASH multi-track digital audio tape recorder.[4] In the 1990s, he headed Sony's Digital Creatures Laboratory, where he was responsible for the Aibo,[5] Sony's robotic dog. In 2003, Doi created the Qrio, a running humanoid robot.

Awards and honors[edit]


  1. ^ Steve Knopper. "Appetite for Self-Destruction: The Rise and Fall of the Record Industry in the Digital Age". Free Press/Simon & Schuster.
  2. ^ "The Compact Disc Turns 25 by Robert Harley". Retrieved 2009-08-18.
  3. ^ K.A. Schouhamer Immink (2018). "How we made the compact disc". Nature Electronics. 1. Retrieved 2018-04-16. An international collaboration between Philips and the Sony Corporation lead to the creation of the compact disc. The author explains how it came about
  4. ^ Daniel, Eric D; Denis Mee, C; Clark, Mark H (1999). Magnetic recording: the first 100 years by Eric D. Daniel, C. Denis Mee, Mark H. Clark. ISBN 978-0-7803-4709-0. Retrieved 2009-08-18.
  5. ^ "Toshitada Doi, Machine learning luminary - and AIBO's first master". Retrieved 2009-08-16.
  6. ^ "Award Winners Eduard Rhein Prize". Retrieved 2009-08-16.
  7. ^ AES Awards winners

External links[edit]