This inventor holds 63 USPTO granted patents and 2 EPO patents, primarily in Signal Processing (CPC class 3641). Top assignees: Hitachi, Ltd., Japan Science and Technology Agency, Nippon Kokan Kabushiki Kaisha. Active years: 1976-2014.
Inventors with similar research interests:
Location History:
- Hitachi, JA (1976 - 1977)
- Chiyoda-ku, JP (2006)
- Ibaraki, JP (1984 - 2013)
- Hitachi, JP (1979 - 2014)
Company Filing History:
58 out of 42,713Â 
5 out of 1,328Â 
1 out of 487Â 
Years Active: 1976-2014
Areas of Expertise:
Title: **Innovations by Yasuo Morooka in Audio Signal Processing**
Introduction
Yasuo Morooka, a prominent inventor from Hitachi, Japan, holds a remarkable portfolio of 63 patents. His expertise in audio signal processing has led to significant advancements that enhance sound quality and user experience in various applications.
Latest Patents
Among Yasuo Morooka's latest inventions are two notable patents that revolutionize audio signal encoding and reproduction. The first patent focuses on **audio signal compression and decoding using band division and polynomial approximation**. This innovation allows audio signals to be encoded efficiently while preserving high-frequency components and preventing sound quality deterioration during the decoding process. By dividing the digital audio signal into multiple frequency bands and applying function approximation, Morooka's method ensures excellent sound quality after compression.
The second patent, titled **sound processing apparatus and sound processing method**, addresses user preferences in sound reproduction. It enables high-quality playback of discrete data by calculating interpolation values that reflect variable parameters. This allows users to tailor the audio output according to different conditions, such as music reproduction environments and sound sources, resulting in a customizable and high-quality sound experience.
Career Highlights
Yasuo Morooka has had an impressive career, working for esteemed organizations such as Hitachi, Ltd. and the Japan Science and Technology Agency. His contributions to audio technology have been fundamental in shaping modern sound processing methodologies, gaining recognition not just in Japan but globally.
Collaborations
Throughout his career, Yasuo Morooka has collaborated with notable colleagues, including Shinya Tanifuji and Masahiko Amano. These partnerships have fostered innovation and have led to enhancements in audio technology that benefit consumers and industries alike.
Conclusion
Yasuo Morooka's work exemplifies the spirit of innovation in audio signal processing. His patents not only contribute to enhanced sound quality and user satisfaction but also stand as milestones in the field of audio technology. Through his ongoing contributions, Morooka continues to influence the way we experience and interact with sound.