Data outputting method, data outputting apparatus, data reproducing method, data reproducing apparatus, data recording method, data recording apparatus, and record medium

• US 20070067650A1
• Filed: 11/17/2006
• Published: 03/22/2007
• Est. Priority Date: 10/04/2000
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro
• Granted Patent: US 7,962,764 B2
• Time in Patent Office: Days
• US Class Current: 713/193
• 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 20/00289 wherein the key is stored as a watermark
• CPC Class Codes: G11B 20/00405 the key being stored by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track
• CPC Class Codes: G11B 20/00601 wherein properties of tracks are altered, e.g., by changing the wobble pattern or the track pitch, or by adding interruptions or eccentricity
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/00746 wherein the usage restriction can be expressed as a specific number
• 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 20/00818 wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals
• CPC Class Codes: G11B 20/00826 wherein a spoiler signal is added to degrade the signal quality
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27

Abstract

A reproducing method is disclosed, that comprises the steps of determining whether or not additional data has been read from data that had been read from a loaded record medium, and when the determined result represents that the additional data has been read from the data, performing a reproducing process for the data that had been read from the record medium corresponding to reward data contained in the additional data.

Claims

1. A data outputting method, comprising the steps of:

when data is output, the data being read from a loaded record medium, additional data being added to the data, determining whether or not an output destination apparatus to which the data is output is an apparatus that satisfies a predetermined condition;

when the determined result represents that the output destination apparatus is an apparatus that satisfies the predetermined condition, determining whether or not the output destination apparatus is a recording apparatus;

when the determined result represents that the output destination apparatus is a recoding apparatus, encrypting the data that has been read from the record medium, outputting the encrypted data, and also outputting an encryption key for decrypting the encrypted data that has been read from the record medium.

2. The data outputting method as set forth in claim 1,

wherein the output destination apparatus determining step is performed by determining whether or not the output destination apparatus is an apparatus corresponding to IEEE 1349 interface.

3. The data outputting method as set forth in claim 2, further comprising the step of:

when the determined result represents that the output destination apparatus is an apparatus not corresponding to the IEEE 1394 interface, encrypting the data that has been read from the record medium and outputting the encrypted data without an encryption key for decrypting the encrypted data.

4. The data outputting method as set forth in claim 2, further comprising the step of:

when the determined result represents that the output destination apparatus is not a recording apparatus, encrypting the data that has been read from the record medium and outputting the encrypted data without an encryption key for decrypting the encrypted data.

5. The data outputting method as set forth in claim 2, further comprising the steps of:

when the determined result represents that the output destination apparatus is a recording apparatus, interpreting the additional data added to the data that has been read from the record medium; and

when the interpreted additional data represents that a recording operation is prohibited, encrypting the data that has been read from the record medium and outputting the encrypted data without an encryption key for decrypting the encrypted data.

6. The data outputting method as set forth in claim 2, further comprising the steps of:

when the determined result represents that the output destination apparatus is a recording apparatus, interpreting the additional data added to the data that has been read from the record medium; and

when the interpreted addition data represents that a recording operation is permitted, encrypting the data that has been read from the record medium and outputting the encrypted data with an encryption key for decrypting the encrypted data.