Hiroki Nagai

Title: Hiroki Nagai: Innovator in Data Encoding Technology

Introduction

Hiroki Nagai is a prominent inventor based in Gifu-ken, Japan. He has made significant contributions to the field of data encoding technology, holding a total of six patents. His work focuses on enhancing the efficiency and reliability of data storage on optical disks.

Latest Patents

One of Hiroki Nagai's latest patents is an encoding apparatus for storing data to disk. This innovative device forms sector units of data, each containing a header and an error detection code, from record data intended for optical disks. It arranges multiple sector units into a matrix, which serves as a block unit of data. The apparatus scrambles the block unit of data, excluding the headers and error detection codes, and appends both a first and a second error correction code for each row and column, respectively. The encoding apparatus includes a generator for error detection codes, a section for scrambling, and controllers that manage these processes in parallel.

Another notable patent is a data processor designed for use with various optical disk recording mediums, including CDs and DVDs. This processor features a first modulation circuit that modulates recording data for CDs and a second modulation circuit for DVDs. It generates write signals for both types of disks, optimizing the circuit area of the data processor by using a common write signal generation circuit.

Career Highlights

Hiroki Nagai is currently employed at Sanyo Electric Co., Ltd., where he continues to develop innovative technologies in data processing and storage. His work has significantly impacted the efficiency of optical disk technology.

Collaborations

Hiroki collaborates with talented coworkers, including Shin-ichiro Tomisawa and Tatsushi Ohyama. Their combined expertise contributes to the advancement of data encoding technologies.

Conclusion

Hiroki Nagai is a key figure in the field of data encoding technology, with a focus on improving data storage methods. His patents reflect his commitment to innovation and efficiency in optical disk technology.