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US 2003/0115504 A1Published application
Measurement of data degradation using watermarks
OwnerMatthew J. Holliman, Minerva M. Yeunginventors
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Abstract
Use of watermarking techniques allow accurate spatial and temporal localization of degraded or corrupted data sets without requiring access to an original source data set. For images, specific corrupted areas within the image can be identified. For audio or audiovisual data, the duration of corruption can be measured. Global or local corruption can be quantitatively measured.
Claims22
A method of
- recovering embedded data from a data set, and
- quantitatively determining degree of data corruption of the data set with respect to an original data set by measuring degradation of recovered embedded data.
An article comprising a computer readable medium to store computer executable instructions, the instructions defined to cause a computer to
- recover embedded data from a data set, and
- quantitatively determine degree of data corruption of the data set with respect to an original data set by measuring the amount of recovered embedded data.
A data degradation measurement system comprising
- a watermark recovery module to recover embedded data from a data set, and
- a measurement module to quantitatively determine degree of data corruption of the data set with respect to an original data set by measuring the amount of recovered embedded data.
A method of
- embedding a signal that degrades with a host signal change, and
- quantitatively determining degree of data corruption of a data set with respect to an original data set by measuring the degradation of recovered embedded signal.
Dependencies are inferred from the claim text.