Error concealment apparatus for a compressed video signal processing system
US5212549A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Jun 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/895
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus in a receiver includes error detection circuitry for detecting segments of transmitted encoded image data having non correctable errors. Further apparatus generates error maps for respective frames in the transmitted sequence. Responsive to the data in the error maps, known good image data or interpolated image data is substituted for data corresponding to the segments containing errors. Error indications for anchor frames, from which predictive frames are encoded, are propagated into error maps corresponding to the predictive encoded frames to accommodate error concealment of errors that may propagate into successive dependently encoded frame data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.