Company Filing History:
3 out of 2,861 
1 out of 64 Years Active: 1994-1997
Title: Hirofumi Matoba: Innovator in Video Signal Processing
Introduction
Hirofumi Matoba is a notable inventor based in Tokorozawa, Japan. He has made significant contributions to the field of video signal processing, holding three patents that showcase his innovative approach to mixing video signals.
Latest Patents
One of Matoba's latest patents is a video image mixing apparatus designed to prevent fluctuations in mixed video images. This apparatus addresses issues that arise when a playback video signal, obtained from a recording medium in a special playing mode, is combined with a graphics video signal. By detecting discontinuities in the phase of the color burst signal, the apparatus delays both signals by a predetermined time period before mixing them. This ensures that the phases of the chroma signals remain equal, even in special modes such as still image reproduction. Another significant patent involves a video signal mixing apparatus that allows for the mixing of playback composite video signals and graphics composite video signals. This invention generates a vertical synchronizing signal for the playback composite video signal, aligning it with the graphics composite video signal to ensure consistency in horizontal scanning lines.
Career Highlights
Hirofumi Matoba has worked with prominent companies in the electronics industry, including Pioneer Electronic Corporation and Hudson Soft Co., Ltd. His experience in these organizations has contributed to his expertise in video technology and innovation.
Collaborations
Throughout his career, Matoba has collaborated with talented individuals such as Manabu Okamoto and Takashi Yoshimi. These partnerships have likely enriched his work and led to advancements in video signal processing.
Conclusion
Hirofumi Matoba's contributions to video signal processing through his innovative patents highlight his role as a significant inventor in the field. His work continues to influence the way video signals are processed and mixed, showcasing the importance of innovation in technology.