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

• US 20070067649A1
• 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 7,966,498 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 recording method, comprising the steps of:

when data to which additional data has been added is recorded, detecting whether or not the additional data has been detected from the data to be recorded; and

when the additional data has been detected, recording the data with the original quality.

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

when the additional data has not been detected, recoding the data with a low quality to the record medium.

3. The recording method as set forth in claim 2,

wherein the recoding step is performed by converting low order bits of the data to all zeros and recording the resultant data to the record medium.

4. The recording method as set forth in claim 1, further comprising the steps of:

interpreting the detected additional data; and

when the interpreted additional data represents that a recording operation is permitted, recording the data to the record medium.

5. The recording method as set forth in claim 4, further comprising the steps of:

interpreting the detected additional data; and

when the interpreted additional data represents that a recording operation is prohibited, terminating the recording operation for the data to the record medium.

6. The recording method as set forth in claim 4,

wherein the additional data contains copyright data.

7. The recording method as set forth in claim 6,

wherein the additional data has been embedded as electronic watermark information to the data.

8. The recording method as set forth in claim 1, further comprising the steps of:

determining the type of the data; and

when the determined result represents that the data is analog data, determining whether or not the additional data added to the analog data has been detected.

9. The recording method as set forth in claim 1, further comprising the steps of:

determining the type of the data; and

when the determined result represents that the data is digital data, determining whether or not the additional data added to the digital data has been detected.

10. A recording apparatus for a record medium, comprising:

additional data detecting portion for detecting additional data added to input data;

a selecting circuit portion for selecting the quality of the input data;

an encoder for performing an encoding process for causing output data of the selecting circuit to be recorded;

a head portion to which output data of the encoder is supplied; and

a controlling portion to which a detected output of the additional data detecting portion is supplied, when the additional data has been detected by the additional data detecting portion, the controlling portion causing the selecting circuit portion to output data with the same quality as the input data.

11. The recording apparatus for the record medium as set forth in claim 10,

wherein when the additional data detecting portion has not detected the additional data, the controlling portion causes the selecting circuit portion to output data with a lower quality than the input data.

12. The recording apparatus for the record medium as set forth in claim 10,

wherein the selecting circuit portion has:

a buffer memory for buffering the input data;

a selector for selecting low order bit data of the output data of the buffer memory or zero data corresponding to a control signal that is output from the controlling portion and outputting the selected data; and

a combining portion for combining high order bit data of the output data of the buffer memory and the output data of the selector.

13. The recording apparatus for the record medium as set forth in claim 12,

wherein the selecting circuit portion has a data generating portion for generating the zero data.

14. The recording apparatus for the record medium as set forth in claim 12,

wherein the additional data has been embedded as electronic watermark information to the input data, and

wherein the additional data detecting portion detects the electronic watermark information from the input data.

15. The recording apparatus for the record medium as set forth in claim 10,

wherein the additional data contains copyright data, and

wherein the encoder has an additional circuit portion for rewriting the copyright data of the output data of the selecting circuit portion.

16. The recording apparatus for the record medium as set forth in claim 15,

when the copyright data is data that represents a recordable state, the additional circuit portion rewrites the copyright data to a state that represents that a recording operation is prohibited.