Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7454330 | Method and apparatus for speech encoding and decoding by sinusoidal analysis and waveform encoding with phase reproducibility | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 2008-11-18 |
| 7139642 | Robot system and robot apparatus control method | Satoru Kamoto, Susumu Oikawa, Kazuo Ishii, Yuko Iijima, Noriyuki Fukushima +3 more | 2006-11-21 |
| 6611800 | Vector quantization method and speech encoding method and apparatus | Masayuki Nishiguchi, Jun Matsumoto | 2003-08-26 |
| 6532443 | Reduced length infinite impulse response weighting | Masayuki Nishiguchi, Jun Matsumoto, Akira Inoue | 2003-03-11 |
| 6243672 | Speech encoding/decoding method and apparatus using a pitch reliability measure | Masayuki Nishiguchi, Jun Matsumoto | 2001-06-05 |
| 6108621 | Speech analysis method and speech encoding method and apparatus | Masayuki Nishiguchi, Jun Matsumoto, Akira Inoue | 2000-08-22 |
| 6047253 | Method and apparatus for encoding/decoding voiced speech based on pitch intensity of input speech signal | Masayuki Nishiguchi, Jun Matsumoto | 2000-04-04 |
| 6023671 | Voiced/unvoiced decision using a plurality of sigmoid-transformed parameters for speech coding | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 2000-02-08 |
| 6018707 | Vector quantization method, speech encoding method and apparatus | Masayuki Nishiguchi, Jun Matsumoto | 2000-01-25 |
| 6012023 | Pitch detection method and apparatus uses voiced/unvoiced decision in a frame other than the current frame of a speech signal | Masayuki Nishiguchi, Jun Matsumoto | 2000-01-04 |
| 5930747 | Pitch extraction method and device utilizing autocorrelation of a plurality of frequency bands | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 1999-07-27 |
| 5909663 | Speech decoding method and apparatus for selecting random noise codevectors as excitation signals for an unvoiced speech frame | Masayuki Nishiguchi, Jun Matsumoto | 1999-06-01 |
| 5899966 | Speech decoding method and apparatus to control the reproduction speed by changing the number of transform coefficients | Jun Matsumoto, Masayuki Nishiguchi, Shiro Omori | 1999-05-04 |
| 5873059 | Method and apparatus for decoding and changing the pitch of an encoded speech signal | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 1999-02-16 |
| 5848387 | Perceptual speech coding using prediction residuals, having harmonic magnitude codebook for voiced and waveform codebook for unvoiced frames | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 1998-12-08 |
| 5828996 | Apparatus and method for encoding/decoding a speech signal using adaptively changing codebook vectors | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 1998-10-27 |
| 5819212 | Voice encoding method and apparatus using modified discrete cosine transform | Jun Matsumoto, Shiro Omori, Masayuki Nishiguchi | 1998-10-06 |
| 5752222 | Speech decoding method and apparatus | Masayuki Nishiguchi, Jun Matsumoto, Shiro Omori | 1998-05-12 |