Masaaki Matsumaru

Title: **Masaaki Matsumaru: Innovator in Optical Disc Technology**

Introduction

Masaaki Matsumaru is a renowned inventor hailing from Funabashi, Japan, whose contributions to optical disc technology have garnered him a total of seven patents. His innovative approaches in the field have led to significant advancements that enhance data retrieval and recording processes.

Latest Patents

Among Matsumaru's latest patents are two noteworthy inventions. The first is an "Optical disc medium having a system information recording area of low recording density." This patent addresses the challenge of stabilizing information reproduction using a partial-response maximum-likelihood (PRML) method. The optical disc medium features a data recording area optimized for high density, complemented by a system information recording area that allows for low-density recording. This design facilitates easier binary equalizing and reproducing of signals, ensuring that circuit-setting information is efficiently stored.

The second patent is for a "Disk, disk device and track center detection method." This innovation improves track center detection accuracy by forming header regions that divide existing grooves. Each header region contains two ID sections that store address information and includes a track center detection mark section situated between the ID sections to aid in effective track center detection.

Career Highlights

Matsumaru has made significant strides in the technology sector by contributing his expertise to major companies, including Kabushiki Kaisha Toshiba and NEC Corporation. His work within these organizations provided him with a platform to refine his skills and develop groundbreaking technologies that have influenced the optical disc industry.

Collaborations

Throughout his career, Matsumaru has collaborated with talented professionals, including Kozo Taira and Chosaku Noda. These collaborations have fostered an environment of innovation and have played a crucial role in the advancement of the technologies he has worked on.

Conclusion

Masaaki Matsumaru's legacy as an inventor is marked by his dedication to enhancing optical disc technology through innovative patents. His work has paved the way for more reliable data storage and retrieval solutions, solidifying his place as a key figure in the realm of technological advancements.