Location History:
- Saitama, JP (1998 - 2003)
- Tokyo, JP (1998 - 2008)
Company Filing History:
Years Active: 1998-2008
Title: Kazuyuki Iijima: A Pioneer in Speech Encoding and Robotics
Introduction
Kazuyuki Iijima is an innovative inventor based in Saitama, Japan, known for his significant contributions to the fields of speech encoding and robotics. With a remarkable portfolio of 18 patents, he continues to push the boundaries of technology through his inventive spirit and expertise.
Latest Patents
Among his latest inventions is a groundbreaking method and apparatus for speech encoding and decoding utilizing sinusoidal analysis and waveform encoding with phase reproducibility. This advanced speech encoding method effectively divides an input speech signal into blocks or frames, encoding it in such a way that explosive and fricative consonants can be impeccably reproduced. The technology minimizes foreign sounds that can occur during transitions between voiced (V) and unvoiced (UV) portions, leading to speech outputs with high clarity and eliminating the 'stuffed' feeling present in previous technologies. His encoding apparatus features a first encoding unit designed for finding residuals of linear predictive coding (LPC) of an input speech signal for harmonic coding, as well as a second encoding unit for waveform coding of the input signal. The utilization of code excited linear prediction (CELP) encoding coupled with vector quantization maximizes the efficiency of the encoding process. Additionally, Iijima developed a corresponding decoding method and apparatus to enhance the overall functionality.
In addition to his work in speech encoding, Iijima has also patented a robot system and control method aimed at improving entertainment properties. This invention facilitates autonomous interactions between multiple robot apparatus, implementing wireless communication to enable conversation and the transmission of commands and semantics among them.
Career Highlights
Kazuyuki Iijima is a distinguished member of Sony Corporation, a leading technology company where his innovative ideas are brought to fruition. His expertise in speech processing and robotics has positioned him as a valuable asset within the company, contributing to advancements in consumer technology and entertainment.
Collaborations
Throughout his career, Iijima has collaborated with notable colleagues, including Masayuki Nishiguchi and Jun Matsumoto. Together, they have worked on various projects, enhancing the capabilities and applications of their inventions.
Conclusion
Kazuyuki Iijima exemplifies the spirit of innovation that drives technology forward. With a focus on improving human-computer interaction through his patents in speech encoding and robotics, Iijima continues to be a significant contributor to the technological landscape. His work at Sony Corporation and collaboration with fellow inventors reflect a commitment to creating groundbreaking solutions that enhance user experience and enrich the field of innovation.
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