Tomoyasu Yamada

Title: The Innovations of Tomoyasu Yamada

Introduction

Tomoyasu Yamada is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of audio technology, holding a total of seven patents. His work primarily focuses on enhancing the functionality and performance of magnetic tape recording and playback systems.

Latest Patents

One of Yamada's latest patents is a magnetic tape recording/playback apparatus designed for automatically detecting a magnetic tape cassette. This innovative device is particularly tailored for digital audio tapes and is capable of executing a variety of controlled playback and recording operations based on user-inputted programs. The apparatus features a magazine that stores cassettes on shelves, allowing for selective extraction and transportation to a drive unit for playing and recording. In one operational mode, it can perform continuous recording from one cassette to another, with the ability to designate cassettes for specific types of music. Additionally, the cassettes are rewound upon completion of a playing program, preparing them for subsequent search operations.

Another significant patent involves digital reconstructing of harmonics to extend the frequency response band. This PCM digital audio signal playback apparatus extracts an original signal component from the digital audio signal read out from a recording medium, producing a harmonic from this component. It then extracts a harmonic component that ranges higher than half of the sampling frequency and adds it to the original signal component. This process allows for high-frequency carrying signals, such as impulses, to be processed without causing ringing in the waveform response.

Career Highlights

Tomoyasu Yamada is currently employed at Pioneer Electronic Corporation, a company renowned for its innovations in audio and visual technology. His work has significantly impacted the development of advanced audio playback systems, making them more user-friendly and efficient.

Collaborations

Yamada has collaborated with notable colleagues, including Nobutoshi Fukuda and Shinichi Nagahara. Their combined expertise has contributed to the advancement of audio technology and the successful development of innovative products.

Conclusion

Tomoyasu Yamada's contributions to the field of audio technology through his patents and collaborations highlight his role as a significant inventor. His work continues to influence the way we experience audio playback today.