Company Filing History:
4 out of 372 
1 out of 52,735 
Years Active: 1991-1996
Title: Ryoichi Yajima: Innovator in High Definition Television Technology
Introduction
Ryoichi Yajima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of high definition television technology. With a total of 4 patents to his name, Yajima has developed innovative systems that enhance video signal transmission and reception.
Latest Patents
One of Yajima's latest patents is a receiver and channel compatible encoding/decoding system for high definition video signals. This system combines high-resolution vertical and horizontal components with standard broadcast signals, such as the NTSC system. It allows for the sampling of high-frequency horizontal resolution components to modulate a first sub-carrier signal, which is then interleaved onto the standard broadcast signal. The vertical high-resolution components are time-compressed and multiplexed onto the broadcast signal, enabling standard receivers to display a standard resolution image while specialized receivers can produce high definition images.
Another notable patent is a signal transmission system for high definition television. This system can handle a second television signal that is superior in quality to a first television signal, such as an NTSC signal. The transmitting end sends a first television signal through a main transmission line, along with a third television signal that includes high definition components. The receiving end synthesizes these signals to produce a high-quality second television signal.
Career Highlights
Throughout his career, Ryoichi Yajima has worked with notable companies, including Nippon Hoso Kyokai and Toshiba Corporation. His work has significantly impacted the development of television technology, particularly in enhancing the quality of broadcast signals.
Collaborations
Yajima has collaborated with esteemed colleagues such as Taiji Nishizawa and Yutaka Tanaka. Their combined expertise has contributed to advancements in the field of high definition television.
Conclusion
Ryoichi Yajima's innovative work in high definition television technology has paved the way for improved broadcasting systems. His patents reflect a deep understanding of video signal processing and transmission, making him a key figure in the industry.