Method for protection of data reproduction according to both medium protection data and apparatus protection data

• US 8,220,016 B2
• Filed: 10/10/2008
• Issued: 07/10/2012
• Est. Priority Date: 02/22/1994
• Status: Expired due to Fees

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: JVC Kenwood Corporation
• Inventors: Sugahara, Takayuki
• Primary Examiner(s): Lee, Young
• Application Number:
  US12/249,459
• Publication Number:
  US 20090074381A1
• Time in Patent Office: 1,369 Days
• Field of Search: 375/240.01, 375/240.25, 375/240.26, 386/94, 386/261, 725/31
• US Class Current: 725/31
• CPC Class Codes: G06F 21/1063 Personalisation
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06F 2221/2101 Auditing as a secondary aspect
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2113 Multi-level security, e.g. mandatory access control
• CPC Class Codes: G06F 2221/2149 Restricted operating environment
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00094 involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 20/00159 Parental control systems
• CPC Class Codes: G11B 20/00188 involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• CPC Class Codes: G11B 20/00739 wherein the usage restriction is associated with a specific geographical region
• CPC Class Codes: G11B 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 2020/00014 the compressed signal being an audio signal
• CPC Class Codes: G11B 2020/10537 Audio or video recording
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/806 : with processing of the sound signal
• CPC Class Codes: H04N 9/87 : Regeneration of colour television signals H04N9/80 takes precedence

Abstract

In a reproduction apparatus, for reproducing an original signal conveyed as main data by a data medium such as a recording disk or broadcasting system, with medium protection data which are specific to the data medium being conveyed together with the main data, the apparatus includes a section for generating apparatus protection data which are specific to the reproduction apparatus, a section for combining the apparatus protection data with the medium protection data to define a protection level, and a section for applying the protection level to restrict reproduction of the original signal, with stepwise variations in restriction occurring in accordance with changes in protection level. The medium protection data may include information for specifying restricted reproduction of portions of the original signal, such as by producing degraded resolution within specified regions of specified frames of a video signal.

Claims

1. A reproduction method providing reproduction protection, for operating on main data which are conveyed by a broadcasting system, said method comprising steps of:

detecting medium protection data conveyed by said broadcasting system,

specifying first protect information as a first plurality of protection levels in response to said medium protection data and first apparatus protection data, wherein said first apparatus protection data are specific to a region or a country,

specifying second apparatus protection data by user selection from a second plurality of protection levels,

generating second protect information by referring to at least said first protect information and said second apparatus protection data wherein;

a) each member of the first plurality of protection levels corresponds with a respective member of the second plurality of protection levels, and

b) executing reproduction of said main data in accordance with said second protect information.

2. The reproduction method as recited in claim 1, wherein said main data are reproduced either in their entirety or not at all in accordance with said second protect information.

3. The reproduction method as recited in claim 1, wherein said main data comprise at least a video signal conveyed by said broadcasting system, and only unprotected scene of said video signal is reproduced among whole video signal.

4. The reproduction method as recited in claim 1, wherein the first plurality of protection levels and the second plurality of protection levels are numerically equal.