Patent ID: 6978377

Claim:
A data processing system comprising: a first data processing apparatus having a setting means that sets first copy-control information showing the copy control state of data in a header section of a data packet and second copy control information showing the copy control state of said data set in greater detail than said first copy control information in a data section of said data packet and an output means that outputs said first copy control information, said second copy control information and said data; and a second data processing apparatus having an input means that inputs the first copy control information showing the copy control state of data in said header section and the second copy control information showing the copy control state of said data set in greater detail than said first copy control information and said data and a controlling means of that determines the copy control state of said data based on said first copy control information and second copy control information inputted by said input means and controls the of said data according to the determination result.