Method and apparatus for determining the severity of corruption in a picture
US10334276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Feb 11, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6375
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder encodes pixels representative of a picture in a multimedia stream, generates a first approximate signature based on approximate values of pixels in a reconstructed copy of the picture, and transmits the encoded pixels and the first approximate signature. A decoder receives a first packet including the encoded pixels and the first approximate signature, decodes the encoded pixels, and transmits a first signal in response to comparing the first approximate signature and a second approximate signature generated based on approximate values of the decoded pixels. If a corrupted packet is detected, the multimedia application requests an intra-coded picture in response to the first approximate signature differing from the second approximate signature. The second signal instructs the decoder to bypass requesting an intra-coded picture and to continue decoding received packets in response to the first approximate signature being equal to the second approximate signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.