Per Ekstrand
163Patents
9h-index
24Co-inventors
80Inventor score
Filing activity: Jul 9, 1987 → Dec 17, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7519538B2 | Audio signal encoding or decoding | Electricity | 138 | Expired |
| US8412365B2 | Spectral translation/folding in the subband domain | Physics | 44 | Active |
| US4859058A | Improved adjustment means for sighting instrument | Physics | 26 | Expired |
| US9245534B2 | Spectral translation/folding in the subband domain | Physics | 19 | Active |
| US8543232B2 | Spectral translation/folding in the subband domain | Physics | 18 | Active |
| US10818306B2 | Backward-compatible integration of harmonic transposer for high frequency reconstruction of audio signals | Physics | 16 | Active |
| US8971551B2 | Virtual bass synthesis using harmonic transposition | Electricity | 14 | Active |
| USRE43189E1 | Enhancing perceptual performance of SBR and related HFR coding methods by adaptive noise-floor addition and noise substitution limiting | General | 11 | Expired |
| US9236061B2 | Harmonic transposition in an audio coding method and system | Physics | 9 | Active |
| US8983852B2 | Efficient combined harmonic transposition | Physics | 9 | Active |
| US10262669B1 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 8 | Active |
| US10134413B2 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 8 | Active |
| US11289106B2 | Backward-compatible integration of high frequency reconstruction techniques for audio signals | Electricity | 8 | Active |
| US9318127B2 | Device and method for improved magnitude response and temporal alignment in a phase vocoder based bandwidth extension method for audio signals | Physics | 8 | Active |
| US8886346B2 | Oversampling in a combined transposer filter bank | Chemistry; Metallurgy | 8 | Active |
| US9159337B2 | Apparatus and method for generating a high frequency audio signal using adaptive oversampling | Physics | 8 | Active |
| US10262668B2 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 8 | Active |
| US8880572B2 | Low delay modulated filter bank | Electricity | 7 | Active |
| US10008213B2 | Spectral translation/folding in the subband domain | Physics | 7 | Active |
| US9384750B2 | Oversampling in a combined transposer filterbank | Chemistry; Metallurgy | 7 | Active |
| US10734010B2 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 7 | Active |
| US10453468B2 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 7 | Active |
| US10553232B2 | Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element | Physics | 7 | Active |
| US9672837B2 | Non-uniform parameter quantization for advanced coupling | Electricity | 6 | Active |
| US9305557B2 | Apparatus and method for processing an audio signal using patch border alignment | Physics | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.