Location History:
- Houya, JP (1983)
- Hoya, JP (1985)
Company Filing History:
Years Active: 1983-1985
Title: Innovations by Fumitada Itakura: Pioneering Advances in Speech Processing
Introduction: Fumitada Itakura is a prominent inventor based in Houya, Japan, known for his contributions to adaptive predictive processing systems and speech synthesis technology. With a total of two patents to his name, Itakura's work reflects his significant impact on the field of telecommunications and signal processing.
Latest Patents: Itakura's latest innovations include an adaptive predictive processing system that focuses on enhancing the quality of speech signals. This system, known as adaptive predictive coding (APC) and adaptive kit allocation (ABA), efficiently splits a speech signal into multiple bands, applying adaptive predictive coding while adjusting quantization characteristics to minimize quantization noise. By detecting the average amplitude of each band during temporal sub-intervals, the system dynamically determines the quantization bit number and step size, facilitating a reduction in the required hardware.
Another notable invention by Itakura is a sound synthesizer that characterizes speech signals using line spectral pair (LSP) parameters. In this synthesizer, control parameters define the filter, which is essentially an all-pole filter with multiple feedback paths. This innovative design utilizes transfer functions with zeroes positioned on the unit circle of the complex plane, enabling high-quality speech synthesis.
Career Highlights: Fumitada Itakura works at Nippon Telegraph and Telephone Public Corporation, where he has dedicated his career to advancing telecommunication technology. His pioneering work in adaptive processing has been instrumental in improving the efficiency and effectiveness of speech communication systems.
Collaborations: Throughout his career, Itakura has collaborated with fellow researchers, including Masaaki Honda and Nobuhiko Kitawaki. These partnerships have played a crucial role in the development of innovative technologies that have shaped the field of speech processing.
Conclusion: Fumitada Itakura's contributions to innovations in adaptive predictive systems and speech synthesis illustrate his dedication to overcoming challenges in telecommunication. His patents reflect a commitment to advancing technology, ultimately enhancing communication methods worldwide.
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