This inventor holds 4 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Heating Appliances Co., Ltd.. Active years: 1979-1990.
Location History:
- Totsukamachi, JP (1979)
- Yokohama, JP (1981 - 1984)
- Kanagawa, JP (1990)
Company Filing History:
Years Active: 1979-1990
Title: Katunobu Takeda: Innovator in Noise Reduction and Video Disc Technology
Introduction
Katunobu Takeda is a notable inventor based in Yokohama, Japan. He has made significant contributions to the fields of noise reduction technology and video disc systems. With a total of 4 patents to his name, Takeda's work has had a lasting impact on the industry.
Latest Patents
One of Takeda's latest patents is a dynamic noise reduction circuit for image luminance signals. This innovative circuit includes a high-pass filter to extract high-frequency components of an image signal, a coring circuit to identify faint signal components as noise, and a low-pass filter for low-frequency components. The adder combines the cored high-frequency component with the low-frequency component, while the coring control circuit adjusts the coring range based on the luminance signal level. This design effectively reduces noise in darker areas of images, enhancing overall picture quality.
Another significant patent is the skip/arm servo system for video disc players. This system allows a signal sensing element, such as a stylus, to skip across recording tracks. It features a stylus position detector that monitors the stylus's position relative to a movable cartridge. A comparator generates an error output based on this position, which is used to adjust the cartridge's movement, ensuring the stylus remains in the correct position. This system facilitates special mode reproduction and allows for easy release from locked grooves on discs.
Career Highlights
Throughout his career, Takeda has worked with prominent companies such as Hitachi, Ltd. and Hitachi Heating Appliances Co., Ltd. His experience in these organizations has contributed to his expertise in developing innovative technologies.
Collaborations
Takeda has collaborated with notable individuals in the field, including Yukio Fukui and Keizo Shimizu. These partnerships have likely enriched his work and led to further advancements in technology.
Conclusion
Katunobu Takeda's contributions to noise reduction and video disc technology demonstrate his innovative spirit and technical expertise. His patents continue to influence the industry, showcasing the importance of his work in enhancing image and audio quality.