Patent ID: 7839886

Claim:
A host device interfacing with a security card, the host device comprising: a first interface unit configured to receive an Ethernet frame including an internet protocol (IP) packet delivering an moving picture experts group (MPEG) transport packet; a second interface unit configured to receive an MPEG transport packet through a cable; a routing engine configured to route the Ethernet frame based on destination information included in the Ethernet frame; a decapsulator configured to parse the MPEG transport packet from the IP packet included in the routed Ethernet frame; a multiplexer configured to generate Cablecard MPEG Packets (CMPs) by attaching a local transport stream identifier (LTSID) to each of the parsed MPEG transport packet and the received MPEG transport packet and send the multiplexed CMPs to the security card; a third interface unit configured to include a first card detect (CD) port, a second CD port, a first VS port, a second VS port, a first VPP port and a second VPP port; and a controller configured to detect both Card Information Structure (CIS) information including module information which identifies whether the security card is an IP card and a level of both signals at the VS ports, determine whether an operation mode of the security card is a single mode of the IP card based on the detected CIS information and the level of both signals of the VS ports, and control the security card to be initialized in the single mode of the IP card, if the operation mode of the security card is the single mode of the IP card and the host device supports the single mode.