Patent ID: 8363258
Filing Date: 2013-01-29
Classification: G11B,H04N

Abstract:
1. A content transmission device for transmitting content, whose copying is controlled, the content transmission device comprising: a processor configured to: a transmitter configured to transmit a packet to the content receiving device, the packet including a header including the first copy control information and the second copy control information, and a payload obtained by encrypting the content with a predetermined content key, wherein the content transmission device operates under a transmission-system environment in which content transmission is performed by using a packet having a format including a header including a field in which the first copy control information is written and a payload including content in which content-embedded copy control information is embedded, and the second copy control information processed by the processor includes mode information representing validity of the second copy control information included in the header, and substitution information representing substitutability of content-embedded copy control information concerning the first copy control information.