Receiving apparatus, receiving method, and supplying medium
View Patent ↗Digital television broadcast signals are received and AV signals are reproduced in a common apparatus. A digital television signal is received and is separated into a compressed first video signal, a compressed first audio signal, and first copyright protection information. An AV signal is reproduced from a recording medium and is separated into a second compressed video signal, a second compressed audio signal, and second copyright protection information. The first signals and information are selected when a received operation command is a command to select the digital television broadcast channel, and the second signals and information are selected when the received operation command is a command to reproduce data. The selected signals and information are decoded to generate a decoded video signal, a decoded audio signal, and a copyright protection signal, and the copyright protection signal is added to the decoded signals to limit copying.
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.
2. A computer-readable medium according to claim 1 , wherein the predetermined method is a method according to the MPEG-2 standard.
3. A computer-readable medium according to claim 1 , wherein the recording medium is a DVD.
4. A computer-readable medium according to claim 1 , wherein said method further comprises recording the received digital television broadcast signal onto the recording medium.
5. A computer-readable medium according to claim 1 , wherein said method further comprises displaying an image based on the decoded video signal and emitting sound based on the decoded audio signal.