Patent ID: 7308098

Claim:
An AV communication control circuit, comprising: a copyright protection processing unit configured to carry out a copyright protection processing with respect to AV data entered from an AV stream signal line; a selection unit configured to select either one of AV data entered from an AV stream signal line and AV data entered from a general purpose bus; a transmission control unit configured to carry out control for transmitting AV data selected by the selection unit to a network; an external connection terminal connected with either one of the AV stream signal line and the general purpose bus, for receiving AV data from one of the AV stream signal line and the general purpose bus; another selection unit configured to select a target to supply AV data received at the external connection terminal to either an AV stream internal signal line connected to the copyright protection processing unit or a general purpose internal bus connected to the selection unit; and a selection control unit configured to control selecting operations of the selection unit and the another selection unit in synchronization.