Av communication control circuit for realizing copyright protection with respect to radio lan

Abstract

An AV communication control circuit suitable for a radio LAN-LSI in a radio AV transmission/reception device is formed by 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 through the copyright protection processing unit and AV data entered from a general purpose bus, and a transmission control unit configured to carry out control for transmitting AV data selected by the selection unit to a network.

1 : 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 through the copyright protection processing unit and AV data entered from a general purpose bus; and    a transmission control unit configured to carry out control for transmitting AV data selected by the selection unit to a network.    
   
   
       2 : The AV communication control circuit of  claim 1 , wherein the copyright protection processing unit carries out the copyright protection processing with respect to AV data entered for which the copyright protection processing has not been carried out before entering the AV communication control circuit, and the selection unit selects either one of AV data entered from the AV stream signal line for which the copyright protection processing is carried out by the copyright protection unit and AV data entered from the general purpose bus for which the copyright protection processing has been carried out before entering the AV communication control circuit.  
   
   
       3 : The AV communication control circuit of  claim 1 , further comprising: 
 a first external connection terminal for receiving AV data from the AV stream signal line and supplying received AV data to the copyright protection processing unit; and    a second external connection terminal for receiving AV data from the general purpose bus and supplying receiving AV data to the selection unit.    
   
   
       4 - 6 . (canceled)  
   
   
       7 : An AV communication control circuit, comprising: 
 a reception control unit configured to carry out control for receiving AV data through a network;    a selection unit configured to select a target to supply received AV data as either one of an AV stream internal signal line and a general purpose internal bus; and    a copyright protection processing unit configured to carry out a copyright protection processing with respect to AV data supplied to the AV stream internal signal line when the selection unit selects the AV stream internal signal line.    
   
   
       8 : The AV communication control circuit of  claim 7 , wherein AV data for which the copyright protection processing is carried out by the copyright protection unit are outputted to an AV stream signal line when the selection unit selects the AV stream internal signal line and AV data for which the copyright protection processing is not carried out are outputted to a general purpose bus when the selection unit selects the general purpose internal bus.  
   
   
       9 : The AV communication control circuit of  claim 7 , further comprising: 
 a first external connection terminal for outputting AV data from the AV stream internal signal line to the AV stream signal line; and    a second external connection terminal for outputting AV data from the general purpose internal bus to the general purpose bus.    
   
   
       10 - 12 . (canceled)  
   
   
       13 : A computer readable medium including computer executable instructions, which when executed by a computer, cause the computer to function as an AV communication control circuit, said method comprising: 
 carrying out a copyright protection processing with respect to AV data entered from an AV stream signal line;    selecting either one of AV data entered from an AV stream signal line and AV data entered from a general purpose bus; and    carrying out control for transmitting AV data selected by the selection unit to a network.    
   
   
       14 : A computer readable medium including computer executable instructions, which when executed by a computer, cause the computer to function as an AV communication control circuit, said method comprising: 
 carrying out control for receiving AV data through a network;    selecting a target to supply received AV data as either one of an AV stream internal signal line and a general purpose internal bus; and    carrying out a copyright protection processing with respect to AV data supplied to the AV stream internal signal line when the selection unit selects the AV stream internal signal line.