IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0153338
(2002-05-22)
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발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
5 |
초록
▼
Systems and methods that protect transport stream content are disclosed. The system may include a first module and a second module, the first module having a common interface. The second module is coupled to the first module via the common interface. In one embodiment, the first module is a set top
Systems and methods that protect transport stream content are disclosed. The system may include a first module and a second module, the first module having a common interface. The second module is coupled to the first module via the common interface. In one embodiment, the first module is a set top box, and the second module is a conditional access card. In one example, the first module demodulates an incoming transport stream, copy protection encrypts the demodulated transport stream and passes the copy protection encrypted transport stream to the second module via the common interface. The second module copy protection decrypts the transport stream received from the first module, conditional access decrypts at least some of packets of the transport stream that were conditional access encrypted, copy protection encrypts the transport stream and passes the copy protection encrypted transport stream to the first module via the common interface.
대표청구항
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What is claimed is: 1. A system for protecting a transport stream content, comprising: a first module including a common interface; and a second module coupled to the first module via the common interface, wherein the first module is configured to demodulate an incoming transport stream, to copy pr
What is claimed is: 1. A system for protecting a transport stream content, comprising: a first module including a common interface; and a second module coupled to the first module via the common interface, wherein the first module is configured to demodulate an incoming transport stream, to copy protection encrypt the demodulated transport stream and to pass the copy protection encrypted transport stream to the second module via the common interface, and wherein the second module is configured to copy protection decrypt the transport stream received from the first module, to conditional access decrypt at least some of packets of the transport stream that were conditional access encrypted, to copy protection encrypt the transport stream and to pass the copy protection encrypted transport stream to the first module via the common interface. 2. The system according to claim 1, wherein the first module is configured to copy protection decrypt the transport stream received from the second module. 3. The system according to claim 2, wherein the first module is configured to copy protection decrypt the entire transport stream received from the second module. 4. The system according to claim 1, wherein the first module comprises a demodulator, a copy protection encryption unit and a processor, the demodulator being operatively coupled to the copy protection encryption unit, the copy protection encryption unit being operatively coupled to the common interface, and the processor being operatively coupled to the common interface. 5. The system according to claim 1, wherein the second module comprises a copy protection decryption unit, a conditional access decryption unit and a copy protection encryption unit, the common interface being operatively coupled to the copy protection decryption unit, the copy protection decryption unit being operatively coupled to the conditional access decryption unit, the conditional access decryption unit being operatively coupled to the copy protection encryption unit, and the copy protection encryption unit being operatively coupled to the common interface. 6. The system according to claim 1, wherein the first module is a receiver module comprising a set top box. 7. The system according to claim 1, wherein the second module is a conditional access card. 8. The system according to claim 1, wherein the common interface is user accessible. 9. A method for protecting a transport stream content of a conditional access system between a first module and a second module, comprising the steps of: (a) demodulating the transport stream received by a first module; (b) copy protection encrypting the demodulated transport stream; (c) passing the copy protection encrypted transport stream to the second module; (d) copy protection decrypting the transport stream received by the second module; (e) conditional access decrypting at least some of packets of the copy protection decrypted transport stream; and (f) copy protection encrypting the transport stream before passing the transport stream to the first module. 10. The method according to the claim 9, wherein the step of copy protection encrypting the demodulated transport stream includes the step of copy protection encrypting the entire demodulated transport stream. 11. The method according to claim 9, wherein the first module is a receiver module that comprises a set top box. 12. The method according to claim 9, wherein the second module is a conditional access card. 13. The method according to claim 9, further comprising the step of: (g) copy protection decrypting the transport stream received from the second module. 14. A system for protecting a transport stream content, comprising: a first module including a common interface; and a second module coupled to the first module via the common interface, wherein the first module is configured to demodulate an incoming transport stream, to copy protection encrypt packets of the demodulated transport stream that were not conditional access encrypted, and to pass the copy protection encrypted packets and to pass the conditional access encrypted packets of the transport stream to the second module via the common interface, and wherein the second module is configured to conditional access decrypt at least some of the packets of the transport stream that were conditional access encrypted, to copy protection encrypt the packets of the transport stream that were conditional access decrypted and to pass the transport stream to the first module via the common interface. 15. The system according to claim 14, wherein the first module comprises a demodulator, a copy protection encryption unit and a processor, the demodulator being operatively coupled to the copy protection encryption unit, the copy protection encryption unit being operatively coupled to the common interface, and the processor being operatively coupled to the common interface. 16. The system according to claim 14, wherein the second module includes a conditional access decryption unit and a copy protection encryption unit, the common interface being coupled to the conditional access decryption unit, the conditional access decryption unit being coupled to the copy protection encryption unit, the copy protection encryption unit being coupled to the common interface. 17. The system according to claim 14, wherein the first module is a receiver module comprising a set top box. 18. The system according to claim 14, wherein the second module is a conditional access card. 19. The system according to claim 14, wherein the common interface is user accessible. 20. A method for protecting a transport stream content of a conditional access system between a first module and a second module, comprising the steps of: (a) demodulating the transport stream received by a first module; (b) copy protection encrypting packets of the demodulated transport stream that were not conditional access encrypted; (c) passing the transport stream, including the copy protection encrypted packets, to the second module; (d) conditional access decrypting at least some of the packets of the transport stream that were conditional access encrypted; and (e) copy protection encrypting the packets of the transport stream that were conditional access decrypted before passing the transport stream to the first module. 21. The method according to claim 20, further comprising the step of: (f) copy protection decrypting the packets of the transport stream that were copy protection encrypted in step (b) and in step (e).
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