Kiyoyuki Isawa

Title: Kiyoyuki Isawa: Innovator in Voice Transmission Technology

Introduction

Kiyoyuki Isawa is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of voice transmission technology, particularly in duplex radio systems. His innovative approach has led to the development of a unique method for transmitting voice signals efficiently.

Latest Patents

Isawa holds a patent for a "Voice transmission method and apparatus in duplex radio system." This invention involves a voice signal that is subjected to 1/N time compression, where N is a numeral not smaller than 2.0. The time-compressed voice signal is then supplied to a transmitter as a modulating signal. The transmitter performs its operation in synchronism with the input period of the modulating signal. The receiving operation involves demodulating the time-compressed and modulated signal, which is then expanded to reproduce the original voice signal. This method allows for efficient use of bandwidth in voice transmission.

Career Highlights

Throughout his career, Kiyoyuki Isawa has worked with prominent companies such as Hitachi Denshi and Tohoku Electric Power Co., Inc. His experience in these organizations has contributed to his expertise in developing advanced communication technologies.

Collaborations

Isawa has collaborated with notable colleagues, including Katsumi Takahashi and Takashi Kurokawa. Their combined efforts have furthered advancements in voice transmission systems.

Conclusion

Kiyoyuki Isawa's contributions to voice transmission technology exemplify his innovative spirit and dedication to improving communication systems. His patent reflects a significant advancement in the field, showcasing his expertise and commitment to innovation.