Power efficient detection of watermarks in media signals
First Claim
1. A media device meter comprising:
- a watermark detector to detect watermarks in a media signal; and
a watermark controller to;
operate the watermark detector in a first operating mode to detect a first watermark in the media signal; and
in response to the first watermark being verified, operate the watermark detector in a second operating mode in which the watermark detector cycles between sleep intervals and active intervals to detect a second watermark at a second location in the media signal relative to a first location of the first watermark in the media signal.
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Abstract
Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to implement power efficient detection of watermarks in media signals are disclosed. Example watermark detection methods disclosed herein include operating a watermark detector in a first operating mode to detect a first watermark in a media signal. Disclosed example watermark detection methods also include, in response to the first watermark being verified, operating the watermark detector in a second operating mode in which the watermark detector cycles between sleep intervals and active intervals to detect a second watermark at a second location in the media signal relative to a first location of the first watermark in the media signal.
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Citations
20 Claims
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1. A media device meter comprising:
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a watermark detector to detect watermarks in a media signal; and a watermark controller to; operate the watermark detector in a first operating mode to detect a first watermark in the media signal; and in response to the first watermark being verified, operate the watermark detector in a second operating mode in which the watermark detector cycles between sleep intervals and active intervals to detect a second watermark at a second location in the media signal relative to a first location of the first watermark in the media signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A watermark detection method comprising:
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operating, by executing an instruction with a processor, a watermark detector in a first operating mode to detect a first watermark in a media signal; and in response to the first watermark being verified, operating, by executing an instruction with a processor, the watermark detector in a second operating mode in which the watermark detector cycles between sleep intervals and active intervals to detect a second watermark at a second location in the media signal relative to a first location of the first watermark in the media signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A tangible computer readable storage medium comprising computer readable instructions which, when executed, cause a processor to at least:
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operate a watermark detector in a first operating mode to detect a first watermark in a media signal; and in response to the first watermark being verified, operate the watermark detector in a second operating mode in which the watermark detector cycles between sleep intervals and active intervals to detect a second watermark at a second location in the media signal relative to a first location of the first watermark in the media signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification