Partial encryption using variable block sizes
US8731193B2 · kind B2 · utility
23Cited by
11References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2009 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Apr 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for data processing, comprising providing a sequence of image frames that is encoded by identifying intra and inter frames in the sequence and applying a variable block size motion compensation (VBSMC) procedure to the inter frames, thereby generating respective parameters representing the inter frames; selectively encrypting the block sizes, using an encryptor, without encrypting all of the parameters representing the inter frames; and outputting encoded data representing the sequence of the image frames and comprising the encrypted block sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.