This inventor holds 2 USPTO granted patents. Top assignee: Nec Corporation. Active years: 1993-1995.
Company Filing History:
Years Active: 1993-1995
Title: Fumie Hazu: Innovator in Digital Signal Processing
Introduction
Fumie Hazu is a prominent inventor based in Tokyo, Japan. She has made significant contributions to the field of digital signal processing, particularly in the area of bandwidth compression transmission. With a total of 2 patents, her work has advanced the efficiency of digital communications.
Latest Patents
Hazu's latest patents include innovative methods for variable bit rate bandwidth compression transmission through a network. This invention involves converting digital samples of analog speech and music signals into compressed digital samples. The process derives first and second bit assignment signals that represent quantization levels for high and low transmission rates. The compressed digital samples are quantized based on the first bit assignment signal and split into higher and lower significant bits. These bits are then assembled into priority cells for transmission to an ATM network, allowing for efficient data recovery at the destination.
Another notable patent focuses on adaptive bit assignment transform coding according to power distribution. In this invention, digital samples of an underlying analog audio-frequency signal are converted into transform coefficients. A first bit assignment value is adaptively assigned to each coefficient based on their power distribution. The coefficients are then weighted according to human auditory sensitivity, and a second bit assignment value is assigned accordingly. This method enhances the quantization of transform coefficients, ensuring high-quality audio transmission.
Career Highlights
Fumie Hazu has built a successful career at NEC Corporation, where she has been instrumental in developing cutting-edge technologies. Her expertise in digital signal processing has positioned her as a leader in her field. Hazu's innovative approaches have not only contributed to her company's success but have also influenced the broader landscape of digital communications.
Collaborations
Hazu collaborates with her coworker, Masahiro Iwadare, who shares her passion for advancing technology in the digital realm. Together, they work on projects that push the boundaries of what is possible in signal processing.
Conclusion
Fumie Hazu's contributions to digital signal processing through her patents and work at NEC Corporation highlight her as a key figure in the field. Her innovative methods for bandwidth compression and adaptive coding continue to shape the future of digital communications.