Patent ID: 7409142
Filing Date: 2008-08-05
Classification: H04N

Abstract:
1. A computer-readable medium having recorded therein a computer program having instructions for carrying out a method for receiving digital television broadcast signals and reproducing AV signals in a common apparatus, said method comprising: receiving at least one operation command provided by a user; determining whether the received operation command is a command to select a digital television broadcast channel or a command to reproduce data; when the received operation command is a command to select a digital television broadcast channel: receiving a digital television broadcast signal, and separating the received digital television broadcast signal into a first video signal coded in a compressed form according to a predetermined method, a first audio signal coded in the compressed form, and first copyright protection information; when the received operation command is a command to reproduce data: reproducing an AV signal from a recording medium, and separating the reproduced signal into a second video signal coded in the compressed form, a second audio signal coded in the compressed form, and second copyright protection information; selecting the first video signal, the first audio signal, and the first copyright protection information when the received operation command is the command to select the digital television broadcast channel and selecting the second video signal, the second audio signal, and the second copyright protection information when the received operation command is the command to reproduce data; decoding the selected video signal, the selected audio signal, and the selected copyright protection information to generate a decoded video signal, a decoded audio signal, and a copyright protection signal; and adding the copyright protection signal to the decoded video signal and to the decoded audio signal to limit the copying of the decoded video signal and the decoded audio signal.