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:
Jan. 07, 2014
Filed:
Jan. 14, 2009
An Mei Chen, San Diego, CA (US);
Jangwon Lee, San Diego, CA (US);
An Mei Chen, San Diego, CA (US);
Jangwon Lee, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods and apparatus to reduce channel switching time. A method for channel switching includes bundling entitlement control messages (ECMs) to generate bundled ECMs that comprise decryption keys associated with a first content channel and one or more additional content channels, respectively, and transmitting the bundled ECMs with the first content channel. An apparatus for channel switching includes key acquisition logic configured to receive bundled ECMs that comprise decryption keys associated with a first content channel and one or more additional content channels, respectively, processing logic configured to receive a request to render a second content channel that is part of the one or more additional content channels, and decryption logic configured to utilize a selected decryption key obtained from the bundled ECMs to decrypt the second content channel.