REPRODUCING APPARATUS, RECORDING APPARATUS AND DISPLAY APPARATUS
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Abstract
A system effecting a data reproducing method for a plurality of devices, for sending and receiving data by authenticating the plurality of devices with each other, said data reproducing method including: selecting, from a plurality of descrambling methods, a descrambling method corresponding to a type of said data, executing authentication by an authenticating method corresponding to the selected descrambling method, where the authenticating method is selected from a plurality of authenticating methods, and reproducing said data.
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Citations
7 Claims
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1. (canceled)
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2. An authentication method for use in sending/receiving data between a coded data output apparatus for outputting coded data having a water mark, and a recording apparatus for recording data onto a recording medium, the method comprising:
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deciding a type of the recording medium used by the recording apparatus; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium, and conducting authentication between the coded data output apparatus and the recording apparatus, using the authentication method; sending/receiving data between the coded data output apparatus and the recording apparatus after conducting the authentication; and in a case where the coded data has the water mark, detecting the water mark by the coded data output apparatus, wherein the data exchanged between the coded data output apparatus and the recording apparatus is scrambled by a scrambling method corresponding to the type the recording medium.
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3. A recording method for recording coded data outputted from a coded data output apparatus onto a recording medium by a recording apparatus, comprising:
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deciding a type of the recording medium; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium; conducting authentication between the coded data output apparatus and the recording apparatus in accordance with the authentication method selected; in the case where a water mark is included in the coded data, detecting the water mark; and outputting data from the coded data output apparatus to the recording apparatus, wherein the data exchanged between the coded data output apparatus and the recording apparatus is scrambled by a scrambling method corresponding to the type the recording medium.
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4. An authentication method for conducting authentication between a reproducing apparatus for reproducing and outputting data recoded on a recording medium and a decoding apparatus for decoding the data outputted from the reproducing apparatus, comprising:
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deciding a type of the recording medium; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium, and conducting authentication between the coded data output apparatus and the recording apparatus, using the authentication method selected; after conducting the authentication, sending/receiving data between the reproducing apparatus and the decoding apparatus; and in the case where a water mark is included in the data, detecting the water mark, wherein exchanged between the reproducing apparatus and decoding apparatus is scrambled by a scrambling method corresponding to the type of the recording medium.
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5. A reproducing method for reproducing data recorded in a recording medium, comprising:
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deciding a type of the recording medium; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium; conducting, based on the authentication method selected, authentication between a reproducing apparatus for reproducing and outputting data recorded in the recording medium and a decoding apparatus for decoding the data outputted from the reproducing apparatus; after conducting the authentication, sending/receiving data between the reproducing apparatus and the decoding apparatus; and in the case where a water mark is included in the data, detecting the water mark, wherein data sent/received between the reproducing apparatus and decoding apparatus is scrambled by a scrambling method corresponding to the type of the recording medium.
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6. A recording method for recording coded data outputted from a coded data output apparatus onto a recording medium by a recording apparatus, comprising:
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deciding a type of the recording medium; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium and conducting authentication between the coded data output apparatus and the recording apparatus in accordance with the authentication method selected; in the case where a water mark is included in the coded data, detecting the water mark; outputting data from the coded data output apparatus to the recording apparatus; and writing the data onto the recording medium, with a code for indicating a copy limitation imposed on the data and a code for indication if the data has been scrambled or not.
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7. A method for reproducing data recoded in a recording medium, comprising:
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reproducing by a reproducing apparatus, from the recording medium, the data, with a code for indicating a copy limitation imposed on the data and a code for indication if the data has been scrambled or not, and outputting the data and the codes; deciding a type of the recording medium; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium; conducting authentication between the reproducing apparatus and a coding apparatus for decoding the data; after conducting the authentication, sending/receiving data between the reproducing apparatus and the decoding apparatus; and in the case where a water mark is included in the coded data, detecting the water mark.
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Specification