Roger Lagadec

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Roger Lagadec, 2019

Roger Lagadec (born September 10, 1946 in Horgen ) is a Swiss electrical engineer and pioneer in audio technology .

Life

Roger Lagadec had a French father and a Swiss mother. He grew up in France and attended the Lycée Charlemagne in Paris. He graduated from high school with the Baccalauréat in 1963. He then studied electrical engineering at the ETH Zurich until 1968 and then became Ernst Baumann's assistant at the Institute for Technical Physics at the same university. As a senior assistant at this institute, he succeeded Arvind Shah . There Lagadec was with a work on signal processing in telecommunications, entitled Digital channel converters for the quadrature method for Dr. sc. techn. PhD. In 1973 he acquired Swiss citizenship in the municipality of Kloten . His first industrial activity began in 1979 at Studer Revox in Regensdorf ZH as product manager for digital studio technology . This company was known for the highest quality tape recorders . Significant technical contributions from Lagadec concern PCM digital audio. He was named as the inventor of patents for processes of real-time sampling rate conversion (arbitrary, also time-variable ratios, multi-stage and single-stage processes) and published several corresponding specialist articles. Originally only a conversion between digital audio signals of different sampling frequencies in simple, exactly integer ratios (around 16:25) was known. In 1981, Lagadec was the first to invent and publish a method for implementation at any sampling frequency, including drifting or fluctuating over time, and also developed a corresponding professional product for his employer at the time, Studer. Since then, the process has been used in numerous audio products around the world, especially in chips ( AD converters , sample rate converters , dedicated interfaces) and in entertainment electronics devices.

In the mid-1980s, Lagadec realized that company director Willi Studer did not want to see the effects digital audio and video technology had on his company. That is why Lagadec switched to Sony, the market leader for audio technology products at the time, in 1985 . He was overall responsible for the Professional Audio Division of Sony in Atsugi , Japan, from 1987 to 1991, one of the few Europeans in the management of renowned Japanese companies. He then moved to Europe, where he became Technical Director of Sony Europe in Cologne . He worked for Sony for a total of eight years.

He has received several awards for his extraordinary achievements in the field of sound engineering. The most important international professional organization in the field of audio engineering ( Audio Engineering Society AES) honored him with their Fellowship in 1983. For the annual conference of the AES 1999 he was invited to give the introductory lecture ( Richard C. Heyser Memorial Lecture, keynote speaker ). Lagadec was asked by the editors of the book Engineers Build Switzerland to write a contribution about his work and experiences in the audio industry.

From 1996 to 1998 he then worked for the Swiss Ringier media group in the field of electronic media. From 1999 until his retirement, Lagadec worked for Swisscom in various functions in the Future Products division . Several patents from this period are evidence of his wealth of ideas.

Publications

Patents

Memberships

  • former governor of the Audio Engineering Society international association
  • former Vice President of the Swiss Interactive Media Association (Sima) .

Honors

  • The Audio Engineering Society (AES) honored him as a Fellow.

literature

  • Franz Betschon , Stefan Betschon, Jürg Lindecker, Willy Schlachter (eds.): Engineers build Switzerland . NZZ Libro, Vol. 1 (2nd edition 2014) 

Individual notes

  1. ↑ a b Dissertation No. 5470 tech. sc.SFIT, Zurich, 1975
  2. ^ Dominik Landwehr: Swiss made for cultural offenders. NZZ, August 10, 2010, accessed on June 17, 2019
  3. ↑ European patent EP 0 052 847 A2: Method and circuit arrangement for converting the sampling frequency of a sampling sequence while avoiding the conversion into a continuous signal. Inventors: Lagadec, Roger and Kunz, Henry O., priority date 11/26/1980 CH.
  4. ↑ R. Lagadec, HO Kunz: A Universal Digital Sampling Frequency Converter for Digital Audio. Proc. IEEE ICASSP-81, Atlanta, April 1981, pp. 595-598.
  5. ↑ Ken Pohlmann: FILTERS a la ANALOG. Audio, July 1985, p. 18th
  6. ↑ a b c Roger Lagadec: The eye listens. Willi Studer - a patron in technological upheaval. In: Franz Betschon et al. (Ed.): Engineers build Switzerland - first-hand history of technology , pp. 446–457. Verlag Neue Zürcher Zeitung, Zurich 2013, ISBN 978-3-03823-791-4
  7. ^ AES Fellowships 1983. AES Awards, accessed October 24, 2019
  8. ↑ Roger Lagadec: Digital Audio and the Challenge of the Internet. J. Audio Eng. Soc., Volume 47, No. November 11, 1999, p. 1017, accessed October 24, 2019
  9. ↑ Hi-Fi voice out of nowhere. Spiegel online, August 7, 1995, accessed June 17, 2019
  10. ↑ Roger Lagadec . Freshpatents, accessed June 17, 2019
  11. ↑ Entry in SwissBib
  12. ↑ Peter C. Rudin is the new SIMA President. Netzwoche, March 16, 2000, accessed on June 17, 2019
personal data
SURNAME Lagadec, Roger
BRIEF DESCRIPTION Swiss electrical engineer and audio technology pioneer
DATE OF BIRTH September 10, 1946
PLACE OF BIRTH Horgen