This inventor holds 5 USPTO granted patents. Top assignees: Victor Company of Japan, Limited, Thomson-Brandt. Active years: 1985-1987.
Location History:
- Kawasaki, JP (1985)
- Tokyo, JP (1985 - 1987)
Company Filing History:
Years Active: 1985-1987
Title: Zenju Otsuki: Innovator in Audio Signal Processing
Introduction
Zenju Otsuki is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of audio signal processing, holding a total of 5 patents. His innovative work focuses on enhancing the way audio signals are processed and displayed.
Latest Patents
One of Otsuki's latest patents is a spectrum display device for audio signals. This invention involves converting an input audio signal into digital signals through AD conversion. The signals are then processed by a central processing unit (CPU) that performs Fast Fourier Transform (FFT) operations and power spectrum calculations. This process results in power spectrum data, which is used to determine the position of each bar in a bar graph displayed on a screen. The invention also includes methods to reduce the number of digital data used in FFT operations by dividing the audio signal into different frequency bands. This allows for the use of varying sampling frequencies, ultimately reducing operating time. Additionally, the CPU can execute parallel operations, and multiple CPUs can be employed to enhance processing speed.
Another significant patent involves a circuit arrangement for automatically correcting frequency response. This invention aims to set a desired frequency response based on the characteristics of a sound field. A microcomputer is utilized to compare the desired frequency response curve with the measured sound pressure level in the sound field. The control signal produced by the microcomputer is used to adjust the frequency response control circuit, which includes amplifiers and resonance circuits. This innovative approach allows for precise level control across multiple bands with a simplified structure.
Career Highlights
Zenju Otsuki has worked with prominent companies in the audio technology sector, including Victor Company of Japan, Limited and Thomson-Brandt. His experience in these organizations has contributed to his expertise in audio signal processing and innovation.
Collaborations
Throughout his career, Otsuki has collaborated with notable individuals such as Mamoru Inami and Yoshiaki Tanaka. These collaborations have likely enriched his work and led to further advancements in the field.
Conclusion
Zenju Otsuki is a distinguished inventor whose contributions to audio signal processing have made a significant impact. His innovative patents reflect his dedication to enhancing audio technology and improving user experiences.