= 1.42 Inventors with similar research interests:
Location History:
- Tokyo, JP (1993 - 2001)
- Kawasaki, JP (2001 - 2013)
- Osaka, JP (2010 - 2013)
- Kanagawa, JP (2008 - 2021)
Years Active: 1993-2021
Title: The Innovative Contributions of Toshiyuki Morii
Introduction: Toshiyuki Morii, based in Kanagawa, Japan, is a distinguished inventor with an impressive portfolio of 95 patents. His work is primarily focused on advancements in voice coding and vector quantization technologies, which have significant implications for audio processing.
Latest Patents: One of his latest patents details a "Vector quantization of algebraic codebook with high-pass characteristic for polarity selection." This innovation provides a vector quantization device, voice coding device, vector quantization method, and voice coding method that leads to a reduction in the calculation amount of voice codec while maintaining voice quality. The vector quantization device operates through a first reference vector calculation unit that computes a first reference vector by applying auditory weighting using LPC synthesis filters. Additionally, a second reference vector calculation unit further refines this by applying a filter characterized by high-pass functionality. A polarity preliminary selection unit is employed, generating a polar vector and selecting a unit pulse of either positive or negative polarity based on the elements of the second reference vector.
Career Highlights: Toshiyuki Morii has contributed to noteworthy advancements in his field while working for prominent firms, including Panasonic Corporation and Matsushita Electric Industrial Co., Ltd. His extensive experience in these leading companies has honed his skills and expanded his contributions to technology.
Collaborations: Throughout his career, Morii has collaborated with notable colleagues, including Kazutoshi Yasunaga and Hiroyuki Ehara. These partnerships have facilitated innovative developments and propelled the advancement of voice coding technology.
Conclusion: Toshiyuki Morii's contributions to innovation in voice coding and vector quantization are significant, with a strong emphasis on improving quality without sacrificing performance. His extensive patent portfolio is a testament to his inventive prowess and commitment to technological advancement in audio processing.
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