Mixed-media data encoding
US7461405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Feb 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Mixed-media data, such as that including animation data (801), model data (802) and texture data (803) along with other media data types is encoded. To prevent unauthorized access. The data types are combined to produce a mixed-media data file (805). Passwords are added to produce an internal file with passwords (1103). A file key (1202) is combined with a program key (1203) to produce an encryption key (1204). The encryption key is used to encrypt the internal file (1103) to produce an encrypted internal file (1302). The file key (1202) is added to the encrypted internal file as part of a header to produce a coded export file (1401). In this way, a plurality of access keys may exist each providing different levels of access to a user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.