Location History:
- Berkeley, CA (US) (1979 - 1990)
- Piedmont, CA (US) (1990 - 1993)
Company Filing History:
10 out of 18 
2 out of 21,594 
1 out of 2,439 
Years Active: 1979-1993
Title: **Elwyn R. Berlekamp: A Pioneer in Digital Optical Sound Systems**
Introduction
Elwyn R. Berlekamp is a renowned inventor based in Berkeley, CA, whose contributions to the field of digital audio and optical technologies are significant. With a total of 13 patents to his name, Berlekamp has made a lasting impact on innovations that enhance sound reproduction in films.
Latest Patents
Among his latest innovations is a groundbreaking digital optical sound system. This system involves sophisticated methods for estimating the horizontal and vertical positions of digital bits on film, which are corrected by tracking the transition boundaries of these bits in both directions. To ensure fidelity in sound reproduction, the frequency of useful film bit transitions in the vertical direction is optimized prior to recording. This is achieved through error correction encoding of digital audio bytes, utilizing a symmetrical generator polynomial, and selectively inverting symmetric portions of each codeword. Additionally, the frequency of useful transitions in the horizontal direction is maximized by channel encoding the error correction symbols in each codeword, effectively managing the weight of the resulting symbol to be half the number of data bits per symbol.
Career Highlights
Throughout his career, Berlekamp has held important roles in various companies, notably working with Cyclotomics, Inc. and Eastman Kodak Company. His expertise and innovative mindset have driven advancements in optical technologies, particularly in improving sound quality for films.
Collaborations
During his career, Berlekamp has collaborated with notable individuals, including Po Tong and Lloyd R. Welch. These partnerships often led to sharing ideas and technological advancements that enriched the field of digital audio and optical systems.
Conclusion
Elwyn R. Berlekamp's contributions to the realm of digital optical sound systems have proved invaluable. His innovations not only reflect his exceptional talent and diligence but also represent a significant stride forward in the audio technology industry. As he continues to explore and develop new technologies, his legacy as a pioneer in this field is firmly established.
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