Broadcasting receiving apparatus and broadcasting receiving method
First Claim
1. A broadcasting receiving apparatus, comprising:
- a tuner configured to output a reception signal on a specific channel selected from a broadcasting signal;
a demodulation portion configured to output a video audio signal by demodulating the reception signal outputted from the tuner;
an encryption portion configured to output an encrypted video audio signal by encrypting the video audio signal outputted from the demodulation portion;
a buffer configured to store one of the video audio signal outputted from the demodulation portion and the encrypted video audio signal outputted from the encryption portion; and
a control portion configured to determine that, when the video audio signal from the demodulation portion needs to be encrypted in the encryption portion, the video audio signal is transferred in a form of first files, each having a first capacity, encrypted on a file-by-file basis in the encryption portion, and stored into a memory region in the buffer portion successively in units of the first capacity, and that when the video audio signal from the demodulation portion need not be encrypted in the encryption portion, the video audio signal is transferred in a form of plural second files, each having a second capacity smaller than the first capacity on the file-by-file basis, and stored into the memory region in the buffer portion successively in units of the second capacity.
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Accused Products
Abstract
A broadcasting receiving apparatus includes a tuner to receive a broadcasting signal and output a reception signal selected therefrom, a demodulation portion to output a video audio signal by demodulating the reception signal from the tuner, an encryption portion to output an encrypted video audio signal by encrypting the video audio signal, a buffer portion to store one of the video audio signal from the demodulation portion and the encrypted video audio signal from the encryption portion, and a control portion to perform control in such a manner that, when the video audio signal needs to be encrypted in the encryption portion, the video audio signal is transferred in the form of first files each having a first capacity (m [KByte]), encrypted on a file-by-file basis in the encryption portion, and stored into a memory region in the buffer portion successively in units of the first capacity, and when the video audio signal need not be encrypted in the encryption portion, the video audio signal is transferred in the form of plural second files each having a second capacity (n [KByte], (m>n)) smaller than the first capacity on a file-by-file basis, and stored into the memory region in the buffer portion successively in units of the second capacity. It is thus possible to provide a receiving apparatus capable of preventing unauthorized copying of a video audio signal committed by tampering with flag information indicating the need for encryption.
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Citations
14 Claims
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1. A broadcasting receiving apparatus, comprising:
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a tuner configured to output a reception signal on a specific channel selected from a broadcasting signal;
a demodulation portion configured to output a video audio signal by demodulating the reception signal outputted from the tuner;
an encryption portion configured to output an encrypted video audio signal by encrypting the video audio signal outputted from the demodulation portion;
a buffer configured to store one of the video audio signal outputted from the demodulation portion and the encrypted video audio signal outputted from the encryption portion; and
a control portion configured to determine that, when the video audio signal from the demodulation portion needs to be encrypted in the encryption portion, the video audio signal is transferred in a form of first files, each having a first capacity, encrypted on a file-by-file basis in the encryption portion, and stored into a memory region in the buffer portion successively in units of the first capacity, and that when the video audio signal from the demodulation portion need not be encrypted in the encryption portion, the video audio signal is transferred in a form of plural second files, each having a second capacity smaller than the first capacity on the file-by-file basis, and stored into the memory region in the buffer portion successively in units of the second capacity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A broadcasting receiving method, comprising:
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outputting a reception signal on a specific channel selected from a broadcasting signal in a tuner;
outputting a video audio signal by demodulating the reception signal from the tuner in a demodulation portion;
outputting an encrypted video audio signal by encrypting the video audio signal in an encryption portion;
storing one of the video audio signal from the demodulation portion and the encrypted video audio signal from the encryption portion into a buffer; and
performing control by a control portion to determine that, when the video audio signal from the demodulation portion needs to be encrypted in the encryption portion, the video audio signal is transferred in a form of first files, each having a first capacity, encrypted on a file-by-file basis in the encryption portion, and stored into a memory region in the buffer successively in units of the first capacity, and that when the video audio signal from the demodulation portion need not be encrypted in the encryption portion, the video audio signal is transferred in the form of plural second files, each having a second capacity smaller than the first capacity on the file-by-file basis, and stored into a memory region in the buffer portion successively in units of the second capacity. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification