Content data recording/reproducing device

• US 20090097372A1
• Filed: 12/26/2006
• Published: 04/16/2009
• Est. Priority Date: 12/28/2005
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Watabe, Akihiro
• Application Number:
  US11/920,115
• Publication Number:
  US 20090097372A1
• Time in Patent Office: Days
• US Class Current: 369/53.21
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• 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 20/00195 using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00666 involving a step of erasing or nullifying data, e.g. data being overwritten with a random string
• CPC Class Codes: G11B 20/00688 said measures preventing that a usable copy of recorded data can be made on another medium
• CPC Class Codes: G11B 20/00731 involving a digital rights management system for enforcing a usage restriction
• CPC Class Codes: G11B 20/00847 wherein the usage restriction is defined by a licence file
• CPC Class Codes: G11B 2020/10833 Copying or moving data from one record carrier to another
• CPC Class Codes: G11B 2020/10842 wherein not all recorded data are copied or moved
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/2575 DVD-RAMs
• CPC Class Codes: G11B 2220/455 said record carriers being in one device and being used as primary and secondary/backup media, e.g. HDD-DVD combo device, or as source and target media, e.g. PC and portable player
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 5/765 : Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/781 : on disks or drums
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 5/913 : for scrambling ; for copy protection

Abstract

Even in the case of copying contents data on a recording medium not compliant with copyright protection, in order to enable the data to be moved to a recording medium compliant with copyright protection, key data to encrypt the contents data is generated per contents data and held in a contents encrypting key memory section 106 in the recording/reproducing device. The contents data is encrypted by the key data in a contents encrypting section 103, while at the same time the key data is encrypted in a key encrypting section 107, both data being recorded together on the HDD 111 not complying with copyright protection. When the contents data is moved to a DVD-RAM 112 of the copyright protection non-compliant recording medium, the key data held in the contents encrypting key memory section 106 is deleted and the contents data cannot be reproduced even by the HDD-DVD recorder 102.

Claims

1. A content data recording/reproducing device performing recording and reproduction of contents data comprising:

a recording section and a reading section recording or reading contents data with respect to a recording medium;

a determining section determining whether the recording medium is a copyright protection compliant recording medium in which handling of contents data complying with conditions of copyright protection is guaranteed or a copyright protection non-compliant recording medium having no such guarantee;

a reproduction control information management section which, when the contents data is to be recorded on the copyright protection non-compliant recording medium, generates and holds reproduction control information necessary for reproducing such contents data; and

a copyright protection management section which performs processing according to the conditions of copyright protection when the contents data is to be recorded on the copyright protection compliant recording medium,

wherein the reproduction control information management section is configured to delete the reproduction control information held when after the contents data is recorded on the copyright protection non-compliant recording medium, it is to be recorded on the copyright protection compliant recording medium.

2. The content data recording/reproducing device according to claim 1, wherein the reproduction control information held by the reproduction control information management section is so configured that reading from outside the device is restricted.

3. The content data recording/reproducing device according to claim 1, further comprising:

an encrypting section encrypting the contents data when the contents data is recorded on the copyright protection non-compliant recording medium; and

a decrypting section decrypting the encrypted contents data read from the copyright protection non-compliant recording medium,

wherein the reproduction control information is key data necessary for the decrypting.

4. The content data recording/reproducing device according to claim 3, wherein when the contents data is recorded on the copyright protection compliant recording medium after the contents data is recorded on the copyright protection non-compliant recording medium, it is so configured that the reading section reads the contents data recorded on the copyright protection non-compliant recording medium, the decrypting section decrypts the contents data by using the key data, and the recording section records the decrypted contents data on the copyright protection compliant recording medium.

5. The content data recording/reproducing device according to claim 1, wherein when the contents data is recorded on a second copyright protection non-compliant recording medium after the contents data is recorded on a first copyright protection non-compliant recording medium, it is so configured that the same reproduction control information generated when recording on the first copyright protection non-compliant recording medium is used for reproducible recording.

6. The content data recording/reproducing device according to claim 5, further comprising a format conversion section converting a format of contents data read from the first copyright protection non-compliant recording medium,

wherein the recording section is configured to record the contents data, whose format was converted, reproducibly on the second copyright protection non-compliant recording medium by using the reproduction control information.

7. The content data recording/reproducing device according to claim 1, wherein when the contents data recorded on the copyright protection non-compliant recording medium is made reproducible on another content data recording/reproducing device, the held reproduction control information management section outputs the reproduction control information to the other content data recording/reproducing device, while at the same time deleting or invalidating such information.

8. The content data recording/reproducing device according to claim 1, wherein when the contents data recorded on the copyright protection non-compliant recording medium by the other content data recording/reproducing device is made reproducible on the content data recording/reproducing device, the reproduction control information management section holds the reproduction control information outputted from the other content data recording/reproducing device.