Error concealment in digital transmissions
US6490551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2001 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Nov 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is provided for transmitting or storing, over an interference affected channel, digital audio signals that have been subjected to data reduction, resulting in a reduced data, digital audio signal that is present in at least one of the time domain and spectral domain, depending on source coding. An interfered-with signal section is detected in the reduced data, digital audio signal at a receiving end. The interfered-with reduced data, digital audio signal section is masked by one of (a) muting only interfered-with spectral values or subbands, or groups of spectral values or subbands in the signal section and (b) replacing only interfered-with spectral values or subbands, or groups of spectral values of subbands in the signal section with a signal component form the same channel or an adjacent channel including at least one of time domain sampled values, spectral domain sampled values, scale factors, and control information, depending on the source coding of the reduced data, digital audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.