Masami Harigai

Title: Innovations by Masami Harigai

Introduction

Masami Harigai is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of technology, particularly in the area of broadcast systems. With a total of 2 patents, his work has had a lasting impact on how we receive and process television signals.

Latest Patents

One of Harigai's latest patents is a device for receiving closed captioned broadcasts. This invention features a synchronizing/separator circuit that effectively separates horizontal and vertical synchronizing signals within a television signal. A phase locked loop synthesizes a clock signal at 32 fH by phase locking the horizontal synchronizing signal with a divided version of the 32 fH clock signal. The phase locked loop includes a voltage controlled oscillator (VCO) that responds to phase comparisons to achieve phase lock. Additionally, a circuit separates the run-in clock and caption data during the horizontal scanning period of 21 H in the vertical blanking interval. The VCO is controlled by the charging and discharging rate of a capacitor, which is charged by a constant current source, allowing for rapid phase locking in preparation for decoding caption data.

Another significant patent is an encoder for superimposing encoded character data or command data. This encoder disconnects video data between a video source and a video using device only during the 21H in the vertical blanking interval. During this time, it applies locally generated coded data signals in a format detectable by conventional data decoding devices to the video using device. The video source may be a camera or tape playback, while the using device could be a TV set or a video tape recorder.

Career Highlights

Masami Harigai has been associated with Sanyo Electric Co., Ltd., where he has contributed to various innovative projects. His work has been instrumental in advancing technology in the broadcasting sector.

Collaborations

Harigai has collaborated with notable coworkers, including Hiroyasu Shindou and Hiroyasu Kishi, who have also contributed to the field of technology.

Conclusion

Masami Harigai's contributions to the field of technology, particularly in broadcast systems, highlight his innovative spirit and dedication to advancing communication methods. His patents continue to influence the way we interact with media today.