Patent ID: 7974280
Filing Date: 2011-07-05
Classification: H04N

Abstract:
1. An apparatus, comprising: a storage and segmentation module configured to receive complementary information extracted from an audiovisual stream and including digital information suitable for permitting reconstruction of the audiovisual stream in conjunction with a modified stream based on the audiovisual stream after the complementary information is extracted, the storage and segmentation module configured to store the complementary information and to segment the complementary information into respective segments corresponding to audiovisual elements in units of streams of complementary information with a variable size; and an encryption module configured to encrypt the complementary information prior to transmitting the complementary information to a local server for transmission to equipment of an addressee, wherein the encryption module is configured to encrypt the complementary information using an encryption key determined by a title of the original stream corresponding to the complementary information and determined by the local server to which the complementary information is to be transmitted.