Koichi Kihara

Title: Koichi Kihara: Innovator in Echo Cancellation and Data Communication

Introduction

Koichi Kihara is a notable inventor based in Chiba, Japan. He has made significant contributions to the fields of echo cancellation and data communication. With a total of 3 patents to his name, Kihara continues to push the boundaries of technology.

Latest Patents

One of Kihara's latest patents is an echo canceler and echo canceling method. This invention features an adaptive filter that generates an echo replica signal from a far-end signal. The filter coefficients of the adaptive filter are updated based on a residual error signal, which is derived by subtracting the echo replica signal from a near-end signal to effectively cancel echo. Additionally, a background noise estimator assesses the near-end background noise power level from the residual error signal. A step size calculator utilizes this estimated noise power to determine the step size for adaptive updating of the filter coefficients. This innovative approach allows for improved echo cancellation under varying noise conditions.

Another significant patent is a redundancy gateway system. This system is designed to prevent short interruptions in data communication caused by system switching in gateway units configured in a multiplex manner for multiple systems. It maintains the communication state prior to system switching, thereby avoiding degradation of communication quality. The system generates a duplicate of a received packet, supplying the same content to the configuration of gateway units. Each gateway unit writes the packet to its own jitter buffer and generates a TDM signal, ensuring seamless communication.

Career Highlights

Koichi Kihara is currently employed at Oki Electric Industry Co., Ltd. His work at this esteemed company has allowed him to develop and refine his innovative ideas in technology. Kihara's contributions have been instrumental in advancing the capabilities of echo cancellation and data communication systems.

Collaborations

Kihara has collaborated with notable coworkers such as Yuzuru Masuya and Takashi Ishiguro. Their combined expertise has fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies.

Conclusion

Koichi Kihara is a distinguished inventor whose work in echo cancellation and data communication has made a significant impact in the field. His innovative patents and collaborations highlight his dedication to advancing technology. Kihara's contributions continue to shape the future of communication systems.