Location History:
- Tokyo, JA (1977 - 1978)
- Tokyo, JP (1979 - 1987)
Company Filing History:
Years Active: 1977-1987
Title: Innovations by Kazuo Ochiai: Pioneering Echo Cancellation and Speech Processing
Introduction
Kazuo Ochiai, an esteemed inventor based in Tokyo, Japan, has made significant contributions to the field of acoustic technology and speech processing. With a total of nine patents to his name, Ochiai's work primarily focuses on enhancing audio communication through innovative solutions.
Latest Patents
Among his latest inventions is an echo canceller designed to attenuate acoustic echo signals. This advanced device operates in conjunction with a loudspeaker and at least one microphone, providing effective echo cancellation particularly in environments like auditoriums. The self-adaptive echo canceller responds to lower frequency components—specifically those below 1.7 kHz—by cancelling out corresponding components of reverberation signals. For higher frequency reverberation, additional components such as an echo suppressor or a voice switch are utilized, optimizing the clarity of communication. Another significant invention by Ochiai is a speech processor featuring a speech analyzer and synthesizer. This technology uses adaptive bit allocation to optimize the encoded transmission of speech signal parameters, enhancing overall sound quality.
Career Highlights
Kazuo Ochiai's career is marked by his role at Nippon Electric Co., Ltd., where he has been instrumental in developing cutting-edge audio technologies. His dedication to innovation has not only garnered numerous patents but also solidified his reputation as a leader in the field.
Collaborations
Throughout his career, Ochiai has collaborated with several notable figures, including Takashi Araseki and Tetsu Taguchi. These partnerships have fostered an environment of mutual creativity, leading to the development of groundbreaking technologies that have impacted audio processing and communication systems.
Conclusion
Kazuo Ochiai stands out as a visionary inventor whose work in echo cancellation and speech processing has significantly advanced the state of audio technology. His patents continue to shape how we experience sound in various settings, ensuring clearer communication and enhancing the overall auditory experience.