Method for watermarking recordings based on atmospheric conditions
First Claim
1. A method for locating a recorder in a protected area, the method comprising:
- (a) generating a signal encoded with watermark information;
(b) broadcasting the watermark signal into a protected area;
(c) obtaining a recording in which at least a portion of the broadcast watermark signal is recorded; and
(d) correlating the recorded portion of the watermark signal with a known position of the broadcast watermark signal;
wherein the watermark signal is based on a desired quality level and the atmospheric conditions.
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Accused Products
Abstract
Signals encoded with watermark information are generated and broadcast into a protected area for capture by illicit recording devices along with their intended targets. An illicit recording in which at least a portion of the broadcast watermark signals are recorded is obtained and correlated with a known position of the broadcast watermark signals to yield the location of illicit recording devices. In an alternate embodiment, a surveillance device, being image and time synchronized with a signal broadcasting device, monitors and records the protected area. Illicit recordings containing the broadcast watermark are obtained and correlated with corresponding recordings taken by the surveillance device to identify the location of illicit recording devices. In an alternate embodiment, the surveillance device further monitors the quality of the broadcast watermark signals and adjusts them accordingly to achieve a desired quality level.
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Citations
28 Claims
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1. A method for locating a recorder in a protected area, the method comprising:
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(a) generating a signal encoded with watermark information; (b) broadcasting the watermark signal into a protected area; (c) obtaining a recording in which at least a portion of the broadcast watermark signal is recorded; and (d) correlating the recorded portion of the watermark signal with a known position of the broadcast watermark signal;
wherein the watermark signal is based on a desired quality level and the atmospheric conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for broadcasting a watermark into a protected area, the method comprising:
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(a) sensing atmospheric conditions in a protected area; (b) generating a watermark signal having a desired quality level based on the atmospheric conditions; (c) broadcasting the watermark signal into the protected area; (d) monitoring the quality level of the broadcast watermark signal; and (e) adjusting the watermark signal to maintain the desired quality level. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification