Location History:
- Hamamatsu, JA (1978)
- Hamamatsu, JP (1978 - 2004)
- Shizuoka, JP (2008 - 2011)
Company Filing History:
Years Active: 1978-2011
Title: **Koji Niimi: Innovator in Multi-Channel Sound Technologies**
Introduction
Koji Niimi, an accomplished inventor located in Hamamatsu, Japan, has made significant contributions to the field of sound technology. With an impressive portfolio of 21 patents, he has developed innovative methods that enhance audio reproduction and echo cancellation in multi-channel systems.
Latest Patents
Niimi’s latest patents include groundbreaking inventions such as the multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus, and transfer function calculation apparatus. These inventions focus on reproducing stereo sound signals directly from loudspeakers, denoted as SP(L) and SP(R). By utilizing a sum signal and a difference signal of these stereo sound signals as reference points, Niimi employs cross spectrum calculations with microphone-collected sound signals. This process enables the determination of transfer functions for four distinct sound transfer systems between the loudspeakers and microphones labeled as MC(L) and MC(R). The resulting transfer functions are transformed using inverse Fourier transform techniques to derive impulse responses, which are then implemented in filter means to generate echo cancel signals, effectively resolving challenges associated with indefinite coefficients in multi-channel echo canceling.
Career Highlights
Throughout his career, Koji Niimi has worked with prestigious organizations including Nippon Gakki Seizo Kabushiki Kaisha and Yamaha Corporation. His innovative spirit has driven advancements in audio technology, allowing for clearer and more effective sound transmission in modern devices.
Collaborations
Niimi has also collaborated with notable peers in the industry, including Toru Hirai and Mikio Tohyama. These partnerships have enabled the exchange of ideas and fostered further innovation within the realm of audio technologies.
Conclusion
Koji Niimi’s contributions to the field of sound technology exemplify the impact of innovation on everyday audio experiences. His extensive research and patents highlight his commitment to advancing audio clarity and functionality, making a significant mark in the industry of sound engineering.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.