Claims
- 1. A video system (100), comprising:
detection circuitry (200A-200C) operative to detect pseudo-synchronization pulses within a composite synchronization signal in dependence upon at least one timing signal; timing circuitry (200D-200F) operative to generate the at least one timing signal; and wherein the at least one timing signal is generated without utilizing synchronization information within the composite synchronization signal.
- 2. The video system (100) of claim 1, wherein the detection circuitry (200A-200C) includes a filter (31) operative to detect at least one predetermined bit pattern representative of the pseudo-synchronization pulses.
- 3. The video system (100) of claim 1, wherein the detection circuitry (200A-200C) is operative to detect pseudo-synchronization pulses in each of a plurality of consecutive lines of a video field.
- 4. The video system (100) of claim 1, wherein the at least one timing signal comprises a plurality of timing signals.
- 5. The video system (100) of claim 4, wherein one of the timing signals (line_en) approximates an interval corresponding to one line of a video field.
- 6. The video system (100) of claim 5, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
- 7. The video system (100) of claim 4, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
- 8. An asynchronous detector (200), comprising:
means (200A-200C) for detecting pseudo-synchronization pulses within a composite synchronization signal in dependence upon at least one timing signal; means (200D-200F) for generating the at least one timing signal; and wherein the at least one timing signal is generated without utilizing synchronization information within the composite synchronization signal.
- 9. The asynchronous detector (200) of claim 8, wherein the detecting means (200A-200C) includes means (31) for detecting at least one predetermined bit pattern representative of the pseudo-synchronization pulses.
- 10. The asynchronous detector (200) of claim 8, wherein the detecting means (200A-200C) detects pseudo-synchronization pulses in each of a plurality of consecutive lines of a video field.
- 11. The asynchronous detector (200) of claim 8, wherein the at least one timing signal comprises a plurality of timing signals.
- 12. The asynchronous detector (200) of claim 11, wherein one of the timing signals (line_en) approximates an interval corresponding to one line of a video field.
- 13. The asynchronous detector (200) of claim 12, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
- 14. The asynchronous detector (200) of claim 11, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
- 15. A method for asynchronously detecting a copy protection scheme in a video system, comprising steps of:
detecting pseudo-synchronization pulses associated with the copy protection scheme within a composite synchronization signal in dependence upon at least one timing signal; and generating the at least one timing signal without utilizing synchronization information within the composite synchronization signal.
- 16. The method of claim 15, wherein the detecting step comprises detecting at least one predetermined bit pattern representative of the pseudo-synchronization pulses.
- 17. The method of claim 15, wherein the detecting step comprises detecting pseudo-synchronization pulses in each of a plurality of consecutive lines of a video field.
- 18. The method of claim 15, wherein the at least one timing signal comprises a plurality of timing signals.
- 19. The method of claim 18, wherein one of the timing signals (line_en) approximates an interval corresponding to one line of a video field.
- 20. The method of claim 19, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
- 21. The method of claim 18, wherein one of the timing signals (four_field_en) approximates an interval corresponding to a plurality of video fields.
Parent Case Info
[0001] This application claims priority to and all benefits accruing from a provisional application filed in the United States Patent and Trademark Office on Dec. 14, 2001, and there assigned Ser. No. 60/340,555.
Provisional Applications (1)
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Number |
Date |
Country |
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60340555 |
Dec 2001 |
US |