Delivering Specific Contents to Specific Recipients Using Broadcast Networks

摘要

Systems and methods for delivering specific contents to specific recipients using broadcast networks. The methods include receiving an AV signal of a broadcast program and supplementary content which contains a tag identifying a specific recipient and specific contents. The specific contents are encrypted with a public key associated with the specific recipient. The supplementary content is combined with the AV signal to form a data-augmented signal which is subsequently encoded and modulated with a carrier signal to form a transmit signal for broadcasting to receivers. Each receiver includes a supplementary decoder for extracting the supplementary content, decrypting the specific contents with a private key corresponding to the public key, and providing the decrypted specific contents to the intended recipient.