Recording medium, recording medium method and apparatus , information signal output control method, recording medium reproducing apparatus, signal transmission method, and content data

• US 20030108200A1
• Filed: 10/21/2002
• Published: 06/12/2003
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro
• Granted Patent: US 7,284,128 B2
• Time in Patent Office: Days
• US Class Current: 380/201
• CPC Class Codes: G06T 1/0071 using multiple or alternating watermarks
• CPC Class Codes: G06T 2201/0064 for copy protection or copy management, e.g. CGMS, copy only once, one-time copy
• 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 20/00905 multiple watermarks used in combination
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 1/32299 using more than one embedding method
• CPC Class Codes: H04N 1/32304 Embedding different sets of additional information
• CPC Class Codes: H04N 2005/91335 the copy protection signal being a watermark
• CPC Class Codes: H04N 21/8358 involving watermark protecting executable software by watermarking G06F21/16; image watermarking in general G06T1/0021; watermarks inserted in still images for transmission purposes H04N1/32144; inserting watermarks during video coding H04N19/467
• CPC Class Codes: H04N 2201/3239 using a plurality of different authentication information
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

A record medium for recording an information signal in which a first watermark and a second watermark have been embedded, the first watermark being transmitted when the information signal is transmitted as an analog signal, the second watermark being transmitted when the information signal is transmitted.

Claims

1. A record medium for recording an information signal in which a first watermark and a second watermark have been embedded, the first watermark being transmitted when the information signal is transmitted as an analog signal, the second watermark being transmitted when the information signal is transmitted.

2. The record medium as set forth in claim 1,

wherein the first watermark and the second watermark each contain copyright information.

3. The record medium as set forth in claim 2,

wherein the first watermark has been embedded in a frequency band other than an audible frequency band of the information signal.

4. The record medium as set forth in claim 2,

wherein the second watermark has been embedded in a low order bit of the information signal.

5. A recording method for a record medium, comprising the steps of:

adding a first watermark to an input information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal;

converting the information signal to which the first watermark has been added into a digital signal;

adding a second watermark to the converted digital signal, the second watermark being transmitted when the information signal is transmitted as a digital signal;

performing an encoding process for the signal to which the second watermark has been added; and

recording the signal for which the encoding process has been performed to the record medium.

6. The recording method for the record medium as set forth in claim 5,

wherein the first watermark and the second watermark each contain copyright information.

7. The recording method for the record medium as set forth in claim 6,

wherein the first watermark has been embedded in a frequency band other than an audible frequency band of the information signal.

8. The recording method for the record medium as set forth in claim 6,

wherein the second watermark has been embedded in a low order bit of the converted digital signal.

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

a first adding portion for adding a first watermark to an input information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal;

a converting portion for converting the information signal to which the first watermark has been added into a digital signal;

a second adding portion for adding a second watermark to the converted digital signal, the second watermark being transmitted when the information signal is transmitted as a digital signal;

an encode processing portion for performing an encoding process for the signal to which the second watermark has been added; and

a recording portion for recording output data of the encode processing portion to the record medium.

10. The recording apparatus for the record medium as set forth in claim 9,

wherein the first watermark and the second watermark each contain copyright information.

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

wherein the first watermark has been embedded in a frequency band other than an audible frequency band of the information signal.

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

wherein the second watermark has been embedded in a low order bit of the converted digital signal.

13. A method for controlling an output of an information signal, the method comprising the steps of:

reading an information signal from a record medium, a first watermark and a second watermark having been embedded in the information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal, the second watermark being transmitted when the information signal is transmitted as a digital signal,

determining whether or not a condition represented by the first watermark matches a condition represented by the second watermark when both the first watermark and the second watermark are detected; and

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to conditions represented by the first watermark and the second watermark when a condition represented by the first watermark matches a condition represented by the second watermark.

14. The method for controlling the output of the information signal as set forth in claim 13, further comprising the step of:

determining whether or not the first watermark is detected when the second watermark has not been detected.

15. The method for controlling the output of the information signal as set forth in claim 14, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the first watermark when the first watermark has been detected.

16. The method for controlling the output of the information signal as set forth in claim 15, further comprising the step of:

permitting the output of the information signal that is read from the record medium so as to copy the information signal when the first watermark has not been detected.

17. The method for controlling the output of the information signal as set forth in claim 13, further comprising the step of:

determining whether or not the first watermark is detected when the second watermark has been detected.

18. The method for controlling the output of the information signal as set forth in claim 17, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the second watermark when the first watermark has not been detected.

19. The method for controlling the output of the information signal as set forth in claim 13, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to at least a watermark that is the first watermark or the second watermark whichever represents a stricter condition when a condition represented by the first watermark does not match a condition represented by the second watermark.

20. A method for controlling an output of an information signal, comprising the steps of:

reading the information signal from a record medium, a first watermark and a second watermark having been embedded in the information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal, the second watermark being transmitted when the information signal is transmitted as a digital signal;

determining which of the first watermark and the second watermark is detected; and

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the detected watermark.

21. The method for controlling the output of the information signal as set forth in claim 20, further comprising the step of:

determining whether or not the first watermark is detected when the second watermark has not been detected.

22. The method for controlling the output of the information signal as set forth in claim 21, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the first watermark when the first watermark has been detected.

23. The method for controlling the output of the information signal as set forth in claim 22, further comprising the step of:

permitting the output of the information signal that is read from the record medium so as to copy the information signal when the first watermark has not been detected.

24. The method for controlling the output of the information signal as set forth in claim 20, further comprising the step of:

determining whether or not the first watermark is detected when the second watermark has been detected.

25. The method for controlling the output of the information signal as set forth in claim 24, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the second watermark when the first watermark has not been detected.

26. The method for controlling the output of the information signal as set forth in claim 20, further comprising the steps:

determining whether or not a condition represented by the first watermark matches a condition represented by the second watermark when both the first watermark and the second watermark have been detected, and

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to the conditions represented by the first watermark and the second watermark when the first watermark matches the second watermark.

27. The method for controlling the output of the information signal as set forth in claim 26, further comprising the step of:

controlling the output of the information signal that is read from the record medium so as to copy the information signal corresponding to at least a watermark that is the first watermark or the second watermark whichever represents a stricter condition when a condition represented by the first watermark does not match a condition represented by the second watermark.

28. A reproducing apparatus for a record medium, comprising:

a decoder for decoding an information signal that is read from a record medium, a first watermark and a second watermark having been embedded in the information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal, the second watermark being transmitted when the information signal is transmitted as a digital signal;

a first detecting portion for detecting the first watermark from the output signal of the decoder;

a second detecting portion for detecting the second watermark from the output signal of the decoder; and

a controlling portion for outputting a control signal that causes one of the first watermark and the second watermark added to the output signal of the decoder to be rewritten corresponding to a condition represented by the other watermark corresponding to detected outputs of the first detecting portion and the second detecting portion.

29. The reproducing apparatus for the record medium as set forth in claim 28, further comprising:

an adding portion for newly adding the first watermark or the second watermark to the output signal of the decoder corresponding to the control signal that is output from the controlling portion.

30. The reproducing apparatus for the record medium as set forth in claim 29,

wherein when the detected results of the first detecting portion and the second detecting portion represent that one of the first watermark and the second watermark has been detected, the controlling portion newly generates the other watermark that has not been detected corresponding to the detected watermark and the adding portion adds the generated watermark to the output signal of the decoder.

31. A signal transmitting method, comprising the steps of:

adding a first watermark to an input information signal, the first watermark being transmitted when the information signal is transmitted as an analog signal;

converting the information signal to which the first watermark has been added into a digital signal;

adding a second watermark to the converted digital signal, the second watermark being transmitted when the information signal is transmitted as a digital signal; and

outputting the signal to which the second watermark has been added.

32. The signal transmitting method as set forth in claim 31,

wherein the first watermark and the second watermark each contain copyright information.

33. The signal transmitting method as set forth in claim 32,

wherein the first watermark has been embedded in a frequency band other than an audible frequency band of the information signal.

34. The signal transmitting method as set forth in claim 32,

wherein the second watermark has been embedded in a low order bit of the converted digital signal.

35. Content data in which a first watermark and a second watermark have been embedded, the first watermark being transmitted when the content data is transmitted as an analog signal, the second watermark being transmitted when the content data is transmitted as a digital signal.

36. The content data as set forth in claim 35,

wherein the first watermark and the second watermark each contain copyright information.

37. The content data as set forth in claim 36,

wherein the first watermark has been embedded in a frequency band other than an audible frequency band of the information signal.

38. The content data as set forth in claim 36,

wherein the second watermark has been embedded in a low order bit of the information signal.