Methods and apparatus for securely transmitting and processing digital image data
US6647149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2001 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Apr 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8153
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for securely transmitting and processing digital image data for display. The invention provides for decomposing, compressing, and scrambling digital image data and forwarding the decomposed, compressed and scrambled image data to a destination where the image data is decompressed, re-composed, and descrambled prior to display. In particular, digital image data is scrambled before or after being compressed and is subsequently descrambled after being decompressed and prior to display such that unauthorized use of the image content is prevented. The invention can be used in conjunction with most standard block-based image compression algorithms such as JPEG as well as some types of wavelet transform based systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.