IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
UP-0713848
(2007-03-05)
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| 등록번호 |
US-7751564
(2010-07-26)
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발명자
/ 주소 |
- Candelore, Brant L.
- Derovanessian, Henry
- Pedlow, Jr., Leo M.
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| 출원인 / 주소 |
- Sony Corporation
- Sony Electronics Inc.
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
0 인용 특허 :
93 |
초록
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In certain embodiments, a method of partially dual encrypting a digital video signal involves examining unencrypted packets of data in the digital video signal to identify a specified packet type. The specified packet type includes packets occurring in a star pattern approximately situated at approx
In certain embodiments, a method of partially dual encrypting a digital video signal involves examining unencrypted packets of data in the digital video signal to identify a specified packet type. The specified packet type includes packets occurring in a star pattern approximately situated at approximately a center of an image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal. This abstract should not be considered limiting since embodiments consistent with the present invention may involve more, different or fewer elements.
대표청구항
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What is claimed is: 1. A method of partially multiple encrypting a digital video signal, comprising: examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets occurring in a star pattern situated within an ima
What is claimed is: 1. A method of partially multiple encrypting a digital video signal, comprising: examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets occurring in a star pattern situated within an image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and at a multiplexer, replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal. 2. The method according to claim 1, wherein the specified packet type further comprises packets containing an intra-coded macroblock within the star pattern. 3. The method according to claim 2, wherein a video frame comprises 30 slices each having 33 macroblocks, and wherein the star pattern is defined by: macroblocks 14-21 in slices 1-6 and 22-30, macroblocks 11-23 of slices 7-12 and 19-21 and macroblocks 1-33 of slices 13-18. 4. The method according to claim 2, wherein a video frame comprises 45 slices each having 80 macroblocks, and wherein the star pattern is defined by: macroblocks 34-51 in slices 1-9 and 32-45, macroblocks 26-56 of slices 10-18 and 28-31 and macroblocks 1-80 of slices 19-27. 5. The method according to claim 2, wherein a video frame comprises 68 slices each having 120 macroblocks, and wherein the star pattern is defined by: macroblocks 50-77 in slices 1-12 and 49-60, macroblocks 40-84 of slices 13-27 and 42-48 and macroblocks 1-120 of slices 28-41. 6. The method according to claim 1, wherein a video frame comprises 30 slices each having 33 macroblocks, and wherein the star pattern is defined by: macroblocks 14-21 in slices 1-6 and 22-30, macroblocks 11-23 of slices 7-12 and 19-21 and macroblocks 1-33 of slices 13-18. 7. The method according to claim 1, wherein a video frame comprises 68 slices each having 120 macroblocks, and wherein the star pattern is defined by: macroblocks 50-77 in slices 1-12 and 49-60, macroblocks 40-84 of slices 13-27 and 42-48 and macroblocks 1-120 of slices 28-41. 8. The method according to claim 1, wherein a video frame comprises 45 slices each having 80 macroblocks, and wherein the star pattern is defined by: macroblocks 34-51 in slices 1-9 and 32-45, macroblocks 26-56 of slices 10-18 and 28-31 and macroblocks 1-80 of slices 19-27. 9. The method according to claim 1, wherein the star pattern is centered above a true center of the image. 10. The method according to claim 1, wherein the star pattern has rays extending horizontally across a full width of the image. 11. The method according to claim 1, wherein the star pattern has rays extending vertically across a full height of the image. 12. The method according to claim 1, wherein the star pattern has a rectangular central region centered approximately one slice above a center of the image. 13. A tangible non-transitory computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 1. 14. The tangible non-transitory computer readable medium of claim 13, wherein the medium comprises an electronic storage medium. 15. A method of partially encrypting a digital video signal, comprising: examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets occurring in a star pattern; wherein the specified packet type further comprises packets containing an intra-coded macroblock within the star pattern and wherein the star pattern is centered above a true center of the image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets in the digital video signal to produce a partially encrypted video signal. 16. The method according to claim 15, further comprising encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and inserting the second encrypted packets into the digital video signal to produce a dual partially encrypted video signal. 17. The method according to claim 15, wherein a video frame comprises 30 slices each having 33 macroblocks, and wherein the star pattern is defined by: macroblocks 14-21 in slices 1-6 and 22-30, macroblocks 11-23 of slices 7-12 and 19-21 and macroblocks 1-33 of slices 13-18. 18. The method according to claim 15, wherein a video frame comprises 45 slices each having 80 macroblocks, and wherein the star pattern is defined by: macroblocks 34-51 in slices 1-9 and 32-45, macroblocks 26-56 of slices 10-18 and 28-31 and macroblocks 1-80 of slices 19-27. 19. The method according to claim 15, wherein a video frame comprises 68 slices each having 120 macroblocks, and wherein the star pattern is defined by: macroblocks 50-77 in slices 1-12 and 49-60, macroblocks 40-84 of slices 13-27 and 42-48 and macroblocks 1-120 of slices 28-41. 20. The method according to claim 15, wherein the star pattern has rays extending horizontally across a full width of the image. 21. The method according to claim 15, wherein the star pattern has rays extending vertically across a full height of the image. 22. The method according to claim 15, wherein the star pattern has a rectangular central region centered approximately one slice above a center of the image. 23. A tangible non-transitory computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 15. 24. The tangible non-transitory computer readable medium of claim 23, wherein the medium comprises an electronic storage medium. 25. A method of partially encrypting a digital video signal, comprising: examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets occurring in a star pattern approximately situated at an upper center of an image, and containing an intra-coded macroblock, the star pattern being centered above a true center of the image and having rays extending horizontally and vertically across a full width and height of the image respectively, the star pattern further having a rectangular central portion centered approximately one slice above a center of the image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; and at a multiplexer, replacing the unencrypted packets of the specified packet type with the first encrypted packets in the digital video signal to produce a partially encrypted video signal. 26. The method according to claim 25, wherein a video frame comprises 30 slices each having 33 macroblocks, and wherein the star pattern is defined by: macroblocks 14-21 in slices 1-6 and 22-30, macroblocks 11-23 of slices 7-12 and 19-21 and macroblocks 1-33 of slices 13-18. 27. The method according to claim 25, wherein a video frame comprises 45 slices each having 80 macroblocks, and wherein the star pattern is defined by: macroblocks 34-51 in slices 1-9 and 32-45, macroblocks 26-56 of slices 10-18 and 28-31 and macroblocks 1-80 of slices 19-27. 28. The method according to claim 25, wherein a video frame comprises 68 slices each having 120 macroblocks, and wherein the star pattern is defined by: macroblocks 50-77 in slices 1-12 and 49-60, macroblocks 40-84 of slices 13-27 and 42-48 and macroblocks 1-120 of slices 28-41. 29. A tangible non-transitory computer readable medium storing instructions which, when executed on a programmed processor, carry out the method of encrypting a digital video signal according to claim 25. 30. The tangible non-transitory computer readable medium of claim 29, wherein the medium comprises an electronic storage medium.
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