Company Filing History:
Years Active: 1991-1995
Title: Hidemitsu Nikoh: Innovator in Digital Signal Processing
Introduction
Hidemitsu Nikoh is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of digital signal processing, holding a total of 4 patents. His innovative work has advanced the technology used in color signal enhancement and encoding.
Latest Patents
One of Hidemitsu Nikoh's latest patents is a PAL encoder that utilizes digital signal processing. This PAL encoder includes a phase converter, first and second low-pass filters, a burst signal adder, a chrominance subcarrier generator, and a modulator. The phase converter is responsible for converting digital first and second color-difference signals into digital U-axis and V-axis signals. The low-pass filters allow low-frequency components of these signals to pass through, producing band-rejected U-axis and V-axis signals. The burst signal adder then combines a predetermined burst signal with these band-rejected signals to create burst-added U-axis and V-axis signals. The chrominance subcarrier generator outputs digital sine and cosine signals, which the modulator uses to produce a digital chroma signal.
Another notable patent is a color-signal enhancing circuit designed to improve picture resolution. This circuit consists of a pair of high-pass filters, a control circuit, and gain controllers. The high-pass filters restrict the frequency region of color difference signals. The control circuit includes gain controllable amplifiers that apply predetermined coefficients to the outputs from the high-pass filters. This innovative design enhances color signals while preventing the appearance of false colors during transitions.
Career Highlights
Hidemitsu Nikoh is currently employed at NEC Corporation, where he continues to develop cutting-edge technologies in digital signal processing. His work has been instrumental in enhancing the quality of color signals in various applications.
Collaborations
Throughout his career, Hidemitsu has collaborated with notable colleagues, including Munenori Kobayashi and Hiroshi Morito. These collaborations have contributed to the advancement of technology in their respective fields.
Conclusion
Hidemitsu Nikoh's contributions to digital signal processing and color signal enhancement have made a significant impact in the industry. His innovative patents reflect his dedication to advancing technology and improving the quality of digital signals.