This inventor holds 2 USPTO granted patents. Top assignees: Hitachi, Ltd., Nippon Telegraph and Telephone Public Corporation. Active years: 1981-1985.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 42,731 
2 out of 522 Years Active: 1981-1985
Title: Innovator Katsumi Haji: Pioneering Video and Audio Transmission Technologies
Introduction
Katsumi Haji is a notable inventor based in Narashino, Japan, recognized for his significant contributions to the field of video and audio transmission systems. With a total of two patents to his name, Haji has developed innovative solutions that enhance the efficiency and performance of communication technologies.
Latest Patents
Haji's latest inventions include the "Buffer Memory Dispersion Type Video/Audio Transmission System" and the "Digital Video and Audio File System." The Buffer Memory Dispersion Type system facilitates the transmission of video and audio information from a central location to subscribers through junction lines, utilizing subcenters with video/audio buffer memory to minimize the number of repeaters required. This innovation enables a more efficient time division multiplex transmission method, significantly reducing the number of transmission lines needed.
The Digital Video and Audio File System created by Haji addresses the demands of center-to-end video communication systems. This system digitizes video signals by separating them into luminance and chrominance components, which are then processed efficiently using code differential and variable length encoding methods. Additionally, the audio information is encoded using the AD-PCM method and recorded alongside the video, optimizing hardware usage in the digital recorder.
Career Highlights
Throughout his career, Katsumi Haji has worked with prominent companies such as Hitachi, Ltd. and Nippon Telegraph and Telephone Corporation. His experience in these organizations has bolstered his expertise in video and audio technologies, laying the groundwork for his innovative patents.
Collaborations
In the course of his professional journey, Haji has collaborated with esteemed colleagues, including Yoji Shibata and Hirohito Nakajima. These partnerships have contributed to his success and the advancement of his inventions.
Conclusion
Katsumi Haji's contributions to the field of video and audio transmission innovations highlight his role as a pioneering inventor. Through his patents, he continues to influence the technology landscape, offering new solutions that enhance communication methods.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile