James David Johnston
102Patents
32h-index
94Co-inventors
93Inventor score
Filing activity: May 20, 1977 → Nov 20, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7630501B2 | System and method for calibration of an acoustic system | Electricity | 1,479 | Active |
| US5285498A | Method and apparatus for coding audio signals based on perceptual model | Electricity | 275 | Expired |
| US4741038A | Sound location arrangement | Electricity | 264 | Expired |
| US8073125B2 | Spatial audio conferencing | Electricity | 219 | Active |
| US5040217A | Perceptual coding of audio signals | Electricity | 175 | Expired |
| US5627938A | Rate loop processor for perceptual encoder/decoder | Electricity | 147 | Expired |
| US6950990B2 | Navigation tool for accessing workspaces and modules in a graphical user interface | Emerging Cross-Sectional Technologies | 135 | Expired |
| US5136377A | Adaptive non-linear quantizer | Electricity | 119 | Expired |
| US5341457A | Perceptual coding of audio signals | Physics | 97 | Expired |
| US6771777B1 | Process for coding and decoding stereophonic spectral values | Electricity | 95 | Expired |
| USRE39080E1 | Rate loop processor for perceptual encoder/decoder | General | 95 | Expired |
| US5535300A | Perceptual coding of audio signals using entropy coding and/or multiple power spectra | Physics | 83 | Expired |
| US5732189A | Audio signal coding with a signal adaptive filterbank | Electricity | 75 | Expired |
| US5309526A | Image processing system | Electricity | 73 | Expired |
| US6996778B2 | User interface for managing multiple network resources | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5481614A | Method and apparatus for coding audio signals based on perceptual model | Electricity | 68 | Expired |
| US5592584A | Method and apparatus for two-component signal compression | Physics | 56 | Expired |
| US5517581A | Perceptually-adapted image coding system | Electricity | 53 | Expired |
| US5852806A | Switched filterbank for use in audio signal coding | Physics | 52 | Expired |
| US5227788A | Method and apparatus for two-component signal compression | Physics | 50 | Expired |
| US5128756A | High definition television coding arrangement with graceful degradation | Electricity | 48 | Expired |
| US4449190A | Silence editing speech processor | Electricity | 46 | Expired |
| US5134475A | Adaptive leak HDTV encoder | Electricity | 42 | Expired |
| US9530421B2 | Encoding and reproduction of three dimensional audio soundtracks | Electricity | 40 | Active |
| US7131007B1 | System and method of retrieving a watermark within a signal | Physics | 37 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.