Image data encryption method, image data transform method, apparatus for the methods, computer program, and computer-readable storage medium
US7362860B2 · kind B2 · utility
9Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Apr 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/444
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention allows the encryption side to set whether an image playback apparatus should play back image data in a scrambled state or a non-scrambled state. When a code-block of input image data is an object to be encrypted, it is encrypted. In playing back the data, it is determined whether playback is to be executed by using the encrypted code-block (the scrambling playback mode is to be set). To inhibit use of the encrypted code-block, a terminating marker is placed at the start of the code-block. To use the encrypted code-block, the terminating marker is placed at the end of the code-block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.