| 摘要 |
A receiving device provides a “new” copy protection signal which causes resistance to certain circumvention devices and includes improved playability. The new copy protection signal causes the certain circumvention devices to pass substantially the copy protection effects to a video recorder, or causes content control effectiveness on a compliant device. That is, the new copy protection signal from the receiver causes the circumvention device to add or enhance copy protection effectiveness, which is contrary to the circumvention device's original intent of removing or reducing copy protection effectiveness. The new copy protection signal is provided by inserting or adding one or more pseudo sync pulses or one or more pseudo sync/AGC pulse pairs immediately after, one line after, or less than two and a half lines after, a vertical sync signal in at least one television line. Thus, the receiver utilizes the new copy protection signal to thwart various intended functions of the circumvention device.
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