The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2011
Filed:
May. 23, 2007
Yong Hua Lin, Beijing, CN;
Guo Hui Lin, Beijing, CN;
Yu Dong Yang, Beijing, CN;
Yu Yuan, Beijing, CN;
Yong Hua Lin, Beijing, CN;
Guo Hui Lin, Beijing, CN;
Yu Dong Yang, Beijing, CN;
Yu Yuan, Beijing, CN;
International Business Machines Corporation, Armonk, NY (US);
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 normal content section of the digital media stream.