Issued Patents All Time
Showing 51–75 of 80 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5294925 | Data compressing and expanding apparatus with time domain and frequency domain block floating | — | 1994-03-15 |
| 5283814 | Apparatus for processing digital signal | Naoto Iwahashi | 1994-02-01 |
| 5260980 | Digital signal encoder | Kyoya Tsutsui | 1993-11-09 |
| 5241603 | Digital signal encoding apparatus | Kyoya Tsutsui, Yoshihito Fujiwara | 1993-08-31 |
| 5204677 | Quantizing error reducer for audio signal | Makoto Akune | 1993-04-20 |
| 5197087 | Signal encoding apparatus | Naoto Iwahashi, Masayuki Nishiguchi, Makoto Akune, Yoshihito Fujiwara | 1993-03-23 |
| 5166981 | Adaptive predictive coding encoder for compression of quantized digital audio signals | Naoto Iwahashi | 1992-11-24 |
| 5157760 | Digital signal encoding with quantizing based on masking from multiple frequency bands | — | 1992-10-20 |
| 5128963 | 3-mode PCM/DPCM/APCM maximizing dynamic range | — | 1992-07-07 |
| 5115240 | Method and apparatus for encoding voice signals divided into a plurality of frequency bands | Yoshihito Fujiwara, Tomoko Umezawa, Masayuki Nishiguchi, Makoto Akune, Naoto Iwahashi | 1992-05-19 |
| 5070515 | Method and apparatus for processing digital signal | Naoto Iwahashi, Hiromi Setoguchi | 1991-12-03 |
| 5038310 | Amplitude compressing and/or expanding circuit employing enhanced normalization | Tomoko Sato | 1991-08-06 |
| 4974235 | Method of adaptive quantization in differential pulse code modulation and a system for transmitting quantized data | Takayuki Sasaki, Hisayoshi Moriwaki, Hideki Fukasawa, Hiromi Takano | 1990-11-27 |
| 4972164 | Amplitude compressing/expanding circuit | Tomoko Sato | 1990-11-20 |
| 4851844 | D/A converter with switched capacitor control | — | 1989-07-25 |
| 4797902 | Digital signal transmission device | Masayuki Nishiguchi | 1989-01-10 |
| 4783792 | Apparatus for transmitting digital signal | Masayuki Nishiguchi | 1988-11-08 |
| 4685115 | Apparatus for transmitting digital signals | Masayuki Nishiguchi | 1987-08-04 |
| 4521738 | Gain control circuit | Masayuki Katakura | 1985-06-04 |
| 4471318 | Circuit for noise reduction particularly useful with signal recording/reproducing apparatus | — | 1984-09-11 |
| 4453091 | Level detecting circuit | Masayuki Katakura, Motomi Ookouchi | 1984-06-05 |
| 4441083 | Noise reduction circuit | Masayuki Katakura, Motomi Ookouchi | 1984-04-03 |
| 4441084 | Noise reduction circuit | Masayuki Katakura, Motomi Ookouchi | 1984-04-03 |
| 4433254 | Level detecting circuit | Masayuki Katakura, Motomi Ookouchi | 1984-02-21 |
| 4427950 | Noise reduction circuit | Masayuki Katakura, Motomi Ookouchi | 1984-01-24 |