JP2010192106A5

JP2010192106A5 -

Info

Publication number: JP2010192106A5
Application number: JP2010099380A
Authority: JP
Filing date: 2010-04-23
Publication date: 2011-02-24
Anticipated expiration: 2021-01-10

Claims

  A digital information receiving apparatus for receiving digital information including video information or audio information transmitted by being scrambled,
  The digital information is accompanied by copy control information,
  The copy control information is information indicating at least one of a first state in which copying is prohibited, a second state in which copying is permitted only once, and a third state in which copying is permitted without limitation,
  Receiving means for receiving the digital information and the copy control information;
  Descrambling means for descrambling the digital information received by the receiving means;
  The digital information descrambled by the descrambling means is recorded on the recording medium built in or loaded in the apparatus by performing encryption unique to the apparatus, the recorded digital information is reproduced from the recording medium, and the encrypted digital information is encrypted. Recording / reproducing means for decoding
  And output means for outputting digital information reproduced by the recording / reproducing means and decrypted.
  When the copy control information received by the receiving unit indicates the second state,
  The recording / reproducing means records the digital information descrambled by the descrambling means on the recording medium together with copy control information indicating that no further copying is possible by performing encryption unique to the apparatus,
  When reproducing and outputting the recorded digital information, the recording / reproducing means reproduces the recorded digital information, decrypts the device-specific encryption applied to the reproduced digital information,
  When the output means outputs the digital information obtained by decrypting the encryption, the output means is in the same state as the state of the recorded copy control information, and is output together with copy control information indicating that copying cannot be performed any more.
  When the recorded digital information is reproduced and moved, the recording / reproducing means reproduces the recorded digital information, decrypts the device-specific encryption applied to the reproduced digital information, and outputs from the output means Copy control that disables reproduction of the reproduced digital information recorded on the recording medium after output, and that the output means restricts copying to one time when outputting the decrypted digital information A digital information receiving apparatus that outputs information together with information.

  A digital information receiving / recording / reproducing method in which digital information including video information or audio information transmitted by being scrambled is received by a receiving device, recorded on a recording medium incorporated in or loaded in the receiving device, and reproduced from the recording medium. There,
  The digital information is accompanied by copy control information,
  The copy control information is information indicating at least one of a first state in which copying is prohibited, a second state in which copying is permitted only once, and a third state in which copying is permitted without limitation,
  Receiving the digital information and the copy control information;
  Descramble the received digital information,
  If the received copy control information indicates the second status, the descrambled digital information is encrypted with the device-specific encryption and is recorded together with the copy control information indicating that no further copying is possible. Record on the medium,
  When reproducing the recorded digital information from the recording medium and outputting it, the device-specific encryption applied to the recorded digital information is decrypted, and the decrypted digital information is converted into the recorded copy control information. It is output with copy control information indicating that copying is not possible any more in the same state as the state,
  A copy indicating that when the recorded digital information is reproduced and moved, the device-specific encryption applied to the recorded digital information is decrypted, and the decrypted digital information is limited to one copy. A digital information receiving / recording / reproducing method comprising: outputting together with control information, and making the reproduced digital information recorded on the recording medium unreproducible after output.

  A digital information transmission / reception method in which digital information including video information or audio information is transmitted from a transmission device and received by a reception device,
  In the transmitter,
  Scramble the digital information and send it with copy control information;
  The copy control information is information indicating at least one of a first state in which copying is prohibited, a second state in which copying is permitted only once, and a third state in which copying is permitted without limitation,
  In the receiving device,
  Receiving the scrambled digital information and the copy control information;
  Descramble the received digital information,
  When the received copy control information indicates the second state, the descrambled digital information is subjected to encryption unique to the receiving device, and is copied together with copy control information indicating that further copying cannot be performed. Recording on a recording medium built in or loaded in the receiving device,
  When reproducing and outputting the recorded digital information, the receiver-specific encryption applied to the recorded digital information is decrypted, and the decrypted digital information is the same as the recorded copy control information state. Is output with copy control information indicating that no more copies can be made.
  Indicates that when the recorded digital information is reproduced and moved, the receiver-specific encryption applied to the recorded digital information is decrypted, and the digital information obtained by decrypting the encryption is limited to one copy. A digital information transmission / reception method comprising: outputting together with copy control information, and making the reproduced digital information recorded on the recording medium unreproducible after output.