Method and system for preventing skipping playback of a special content section of a digital media stream
US7899752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | May 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for preventing skipping the playback of a special content section of a digital media stream is provided. The method comprises a method for providing a digital media stream on the providing side, and a method for playing back a digital media stream as provided by the above providing method on the playing back side. The providing method comprises: decoding an encoded special content section of a digital media stream; generating an encryption key based on the decoded data of the special content section; encrypting a normal content section of the digital media stream using the encryption key; and providing the digital media stream comprising the encoded special content section and the encrypted normal content section. The playback method comprises: receiving the digital media stream; decoding the special content section of the digital media stream; generating an encryption key based on the decoded data of the special content section by using the same method for generating the encryption key in providing the digital media; decrypting the normal content section of the digital media stream using the encryption key; and playing back the special content section and norma…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.