Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12142294 | Signal processing apparatus, method, and program to detect a time interval containing sound based on a distance between two mobile bodies | Ryuichi Namba, Yoshiaki Oikawa | 2024-11-12 |
| 12081961 | Signal processing device and method | Ryuichi Namba, Yoshiaki Oikawa | 2024-09-03 |
| 11997472 | Signal processing device, signal processing method, and program | Ryuichi Namba, Keiichi Aoyama, Yoshiaki Oikawa | 2024-05-28 |
| 11405715 | Information processing apparatus | Ryuichi Namba | 2022-08-02 |
| 11159905 | Signal processing apparatus and method | Ryuichi Namba, Masashi Fujihara, Koyuru Okimoto, Toru Chinen, Kohei Asada +3 more | 2021-10-26 |
| 6941333 | Digital signal processing apparatus and method | Yasuhiro Ogura | 2005-09-06 |
| RE37864 | Quantizing error reducer for audio signal | Kenzo Akagiri | 2002-10-01 |
| 6044338 | Signal processing method and apparatus and signal recording medium | — | 2000-03-28 |
| RE36559 | Method and apparatus for encoding audio signals divided into a plurality of frequency bands | Yoshihito Fujiwara, Tomoko Umezawa, Masayuki Nishiguchi, Naoto Iwahashi, Kenzo Akagiri | 2000-02-08 |
| 5856796 | Sampling rate converting method and apparatus | Tadao Suzuki | 1999-01-05 |
| 5831565 | Signal processing apparatus for converting multi-bit signal having sub-data added thereto into one-bit signal | — | 1998-11-03 |
| 5757938 | High efficiency encoding device and a noise spectrum modifying device and method | Kenzo Akagiri | 1998-05-26 |
| 5754973 | Methods and apparatus for replacing missing signal information with synthesized information and recording medium therefor | — | 1998-05-19 |
| 5737717 | Method and apparatus for altering frequency components of a transformed signal, and a recording medium therefor | Kenzo Akagiri | 1998-04-07 |
| 5719574 | Digital audio transmission apparatus | Ayataka Nishio, Yasuhiro Ogura, Gen Ichimura | 1998-02-17 |
| 5719571 | Sampling rate converting method and apparatus | Tadao Suzuki | 1998-02-17 |
| 5687157 | Method of recording and reproducing digital audio signal and apparatus thereof | Kenichi Imai, Tadao Suzuki, Kenzo Akagiri | 1997-11-11 |
| 5684923 | Methods and apparatus for compressing and quantizing signals | Hiroshi Suzuki | 1997-11-04 |
| 5563913 | High efficiency encoding device and a noise spectrum modifying device and method | Kenzo Akagiri | 1996-10-08 |
| 5299238 | Signal decoding apparatus | Naoto Iwahashi, Masayuki Nishiguchi, Kenzo Akagiri, Yoshihito Fujiwara | 1994-03-29 |
| 5299239 | Signal encoding apparatus | Naoto Iwahashi, Masayuki Nishiguchi, Kenzo Akagiri, Yoshihito Fujiwara | 1994-03-29 |
| 5299240 | Signal encoding and signal decoding apparatus | Naoto Iwahashi, Masayuki Nishiguchi, Kenzo Akagiri, Yoshihito Fujiwara | 1994-03-29 |
| 5204677 | Quantizing error reducer for audio signal | Kenzo Akagiri | 1993-04-20 |
| 5197087 | Signal encoding apparatus | Naoto Iwahashi, Masayuki Nishiguchi, Kenzo Akagiri, Yoshihito Fujiwara | 1993-03-23 |
| 5115240 | Method and apparatus for encoding voice signals divided into a plurality of frequency bands | Yoshihito Fujiwara, Tomoko Umezawa, Masayuki Nishiguchi, Naoto Iwahashi, Kenzo Akagiri | 1992-05-19 |