Packet loss concealment for a sub-band predictive coder based on extrapolation of excitation waveform
US8280728B2 · kind B2 · utility
36Cited by
5References
28Claims
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Key dates
| Filing date | Aug 8, 2007 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Jun 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for performing packet loss concealment using an extrapolation of an excitation waveform in a sub-band predictive speech coder, such as an ITU-T Recommendation G.722 wideband speech coder. The systems and methods are useful for concealing the quality-degrading effects of packet loss in a sub-band predictive coder and address some sub-band architectural issues when applying excitation extrapolation techniques to such sub-band predictive coders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.