This inventor holds 3 USPTO granted patents. Top assignees: Atr Human Information Processing Research Laboratories, Atr Auditory and Visual Perception Research Laboratories. Active years: 1995-2000.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 10 
1 out of 14 Years Active: 1995-2000
Title: Innovations of Inventor Hideki Kawahara
Introduction
Hideki Kawahara is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of signal processing, particularly in the area of speech sound transformation. With a total of 3 patents, his work has garnered attention for its innovative approaches to handling periodic signals.
Latest Patents
Kawahara's latest patents include a method of transforming periodic signals using a smoothed spectrogram. This method involves obtaining a triangular interpolation function based on the fundamental frequency of a signal. The function is then convoluted with a spectrum obtained from an adaptive frequency analysis portion. This process results in a smoothed spectrogram that reduces the influence of periodicity in both frequency and temporal directions. Another significant patent is a method and apparatus for extracting a fundamental frequency based on a speech signal input from a microphone. This invention utilizes a distribution amplifier and a filter group to calculate a stability index, which aids in accurately extracting the fundamental frequency.
Career Highlights
Throughout his career, Kawahara has worked with various research institutions, including Atr Human Information Processing Research Laboratories and Atr Auditory and Visual Perception Research Laboratories. His work in these organizations has allowed him to explore and develop innovative technologies in auditory processing.
Collaborations
Kawahara has collaborated with notable individuals in his field, including Ikuyo Masuda and Kiyoaki Aikawa. These collaborations have contributed to the advancement of research in auditory and visual perception.
Conclusion
Hideki Kawahara's contributions to the field of signal processing and speech sound transformation highlight his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of the complexities of sound and its processing, making him a significant figure in his field.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile