Recording apparatus, recording method, reproducing apparatus, and reproducing method

• US 7,155,013 B2
• Filed: 10/04/2005
• Issued: 12/26/2006
• Est. Priority Date: 03/03/1999
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Okaue, Takumi, Yokota, Teppei, Kihara, Nobuyuki
• Primary Examiner(s): Moise, Emmanuel L.
• Assistant Examiner(s): CALLAHAN, PAUL E
• Application Number:
  US11/243,218
• Publication Number:
  US 20060029230A1
• Time in Patent Office: 448 Days
• Field of Search: 360/15, 360/60, 380/201, 380/203, 380/202, 380/210, 380/217, 380/237, 369/47.12, 369/47.13, 705/51, 705/57, 726/26, 726/33, 386/94, 725/31
• US Class Current: 380/217
• CPC Class Codes: G06F 16/10 File systems; File servers
• 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 21/16 Program or content traceability, e.g. by watermarking
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/445 by mutual authentication, e.g. between devices or programs
• CPC Class Codes: G06F 21/602 Providing cryptographic facilities or services
• CPC Class Codes: G06F 21/72 in cryptographic circuits
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• 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 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00478 wherein contents are decrypted and re-encrypted with a different key when being copied from/to a record carrier
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11C 16/20 Initialising; Data preset; Chip identification
• CPC Class Codes: G11C 16/22 Safety or protection circuits preventing unauthorised or accidental access to memory cells
• CPC Class Codes: G11C 2207/16 Solid state audio deprecated, only for historical reasons, G06F3/16, G11B
• CPC Class Codes: G11C 7/16 Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters

Abstract

A recording apparatus is disclosed, that comprises a compression process means for compressing an input digital signal corresponding to a predetermined compression process and segmenting the compressed digital signal into blocks, a fixed value generating means for generating a predetermined fixed value, an adding means for adding the fixed value generated by the fixed value generating means at a predetermined timing to the blocks of the digital signal compressed by the compression process means, an encrypting means for encrypting the fixed value and the compressed digital signal added by the adding means, and a recording means for recording the fixed value and the compressed digital signal encrypted by the encrypting means to a record medium.

Claims

1. A recording apparatus, comprising:

compression process means for compressing an input digital signal and segmenting the compressed digital signal into blocks;

fixed value generating means for generating a predetermined fixed value;

adding means for adding the fixed value generated by said fixed value generating means at a predetermined timing to the blocks of the digital signal compressed by said compression process means;

encrypting means for encrypting the fixed value and the compressed digital signal added by said adding means; and

recording means for recording the fixed value and the compressed digital signal encrypted by said encrypting means to a recording medium.

2. The recording apparatus as set forth in claim 1,

wherein the record medium is attachable/detachable to/from the recording apparatus.

3. The recording apparatus as set forth in claim 1,

wherein the record medium includes a non-volatile memory.

4. The recording apparatus as set forth in claim 1,

wherein the fixed value generated by said fixed value generating means is varied corresponding to a compression rate.

5. The recording apparatus as set forth in claim 1,

wherein the digital signal is a digital audio signal, and

wherein the fixed value generated by said fixed value generating means is varied corresponding to a channel.

6. The recording apparatus as set forth in claim 1,

wherein the fixed value is added to the first block of the plurality of blocks by said adding means.

7. The recording apparatus as set forth in claim 1,

wherein the fixed value is added to all blocks of the plurality of blocks by said adding means.

8. A recording method, comprising the steps of:

compressing an input digital signal and segmenting the compressed digital signal into blocks;

generating a predetermined fixed value;

adding the generated fixed value at a predetermined timing to the blocks of the compressed digital signal;

encrypting the fixed value and the compressed digital signal that have been added; and

recording the fixed value and the compressed digital signal that have been encrypted to a record medium.

9. The recording method as set forth in claim 8, wherein the record medium is attachable/detachable to/from a recording apparatus.

10. The recording method as set forth in claim 8,

wherein the record medium includes a non-volatile memory.

11. The recording method as set forth in claim 8,

wherein the fixed value is varied corresponding to a compression rate.

12. The recording method as set forth in claim 8,

wherein the digital signal is a digital audio signal, and

wherein the fixed value is varied corresponding to a channel.

13. The recording method as set forth in claim 8,

wherein the fixed value is added to the first block of the plurality of blocks.

14. The recording method as set forth in claim 8, wherein the fixed value is added to all blocks of the plurality of blocks.