Methods and devices for encoding and decoding a sequence of image frames in which the privacy of an object is protected
US10964182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Dec 19, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4318
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method encodes a sequence of image frames depicting an object whose privacy is to be protected. A first and a second version of the sequence of image frames is generated. Image frames of the first version, but not the second version, of the sequence are provided with a privacy mask to protect the privacy of the object depicted therein. The first version of the sequence is encoded as a first encoded sequence of intra-coded image frames and inter-coded image frames. A second version of the sequence is encoded as a second encoded sequence of inter-coded image frames. The inter-coded image frames of the second encoded sequence are encoded by using the intra-coded image frames of the first encoded sequence. The inter-coded image frames of the second encoded sequence are encrypted, and thereafter the first and the second encoded sequence are merged into a single output sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.