Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6131083 | Method of encoding and decoding speech using modified logarithmic transformation with offset of line spectral frequency | Katsumi Tsuchiya | 2000-10-10 |
| RE36721 | Speech coding and decoding apparatus | Masami Akamine | 2000-05-30 |
| 6064962 | Formant emphasis method and formant emphasis filter device | Masahiro Oshikiri, Masami Akamine, Akinobu Yamashita | 2000-05-16 |
| RE36646 | Speech coding system utilizing a recursive computation technique for improvement in processing speed | Masami Akamine, Yuji Okuda | 2000-04-04 |
| 5878387 | Coding apparatus having adaptive coding at different bit rates and pitch emphasis | Masahiro Oshikiri, Masami Akamine, Tadashi Amada | 1999-03-02 |
| 5864798 | Method and apparatus for adjusting a spectrum shape of a speech signal | Masahiro Oshikiri, Akinobu Yamashita, Masami Akamine, Tadashi Amada | 1999-01-26 |
| 5819213 | Speech encoding and decoding with pitch filter range unrestricted by codebook range and preselecting, then increasing, search candidates from linear overlap codebooks | Masahiro Oshikiri, Tadashi Amada, Masami Akamine | 1998-10-06 |
| 5774838 | Speech coding system utilizing vector quantization capable of minimizing quality degradation caused by transmission code error | Tadashi Amada | 1998-06-30 |
| 5677986 | Vector quantizing apparatus | Tadashi Amada, Masami Akamine, Masahiro Oshikiri | 1997-10-14 |
| 5671327 | Speech encoding apparatus utilizing stored code data | Masami Akamine, Masahiro Oshikiri | 1997-09-23 |
| 5265167 | Speech coding and decoding apparatus | Masami Akamine | 1993-11-23 |
| 5230036 | Speech coding system utilizing a recursive computation technique for improvement in processing speed | Masami Akamine, Yuji Okuda | 1993-07-20 |
| 5150387 | Variable rate encoding and communicating apparatus | Hidetaka Yoshikawa, Masami Akamine | 1992-09-22 |