Takatomi Kumagai

Title: Takatomi Kumagai: Innovator in Audio Signal Processing

Introduction

Takatomi Kumagai is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of audio signal processing, holding a total of 4 patents. His work focuses on enhancing audio signal quality through innovative devices and methods.

Latest Patents

Kumagai's latest patents include a phase control signal generation device, a phase control signal generation method, and a phase control signal generation program. The phase control signal generation device is designed to generate a phase control signal for each frequency band of an audio signal converted into the frequency domain. This device features a setting change means that allows for adjustments to the propagation delay time for predetermined frequency bands. Additionally, it includes a difference obtaining means to calculate the difference in propagation delay times before and after any changes. The updating means then modifies the phase control amount based on this difference, while the phase control signal generating means produces a phase control signal for each frequency band through a smoothing process.

Another significant patent involves a signal processing device and method for interpolating high band components of an audio signal. This device detects frequencies that meet specific conditions and applies an offset to these frequencies based on their properties. It generates a reference signal by extracting data from the audio signal and creates an interpolation signal based on this reference. Finally, it synthesizes the interpolation signal with the original audio signal to achieve high band interpolation.

Career Highlights

Kumagai is currently employed at Clarion Co., where he continues to innovate in audio technology. His work has been instrumental in developing advanced audio processing solutions that enhance user experiences in various applications.

Collaborations

Throughout his career, Kumagai has collaborated with notable colleagues, including Yasuhiro Fujita and Tetsuo Watanabe. These partnerships have contributed to the successful development of his patented technologies.

Conclusion

Takatomi Kumagai is a distinguished inventor whose work in audio signal processing has led to multiple patents and advancements in the field. His innovative contributions continue to shape the future of audio technology.