Error processing of steganographic message signals
First Claim
1. A method of decoding of steganographic data, the method comprising:
- processing, using a processor, a media signal to extract message values of the steganographic data, wherein the steganographic data is embedded in the media signal by imperceptibly adjusting data values in the media signal;
assigning confidence values to the message values based in signal statistics by which the values are determined; and
decoding a corrected message from the message values weighted by the assigned confidence values.
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Accused Products
Abstract
A form of error processing is used to decode steganographic messages embedded in image and audio signals in the presence of distortion, which tends to introduce errors in steganographic data communication. Content signals with auxiliary embedded data are analyzed to detect embedded message signals. Confidence values are assigned to the message signals and used to ascertain whether a message has been accurately detected. Error processing enables accurate message extraction in the presence of “soft errors” in the embedded message signal. This error processing enables more effective recovery of the steganographic message from content signals that undergo distortion and/or loss transformations after being embedded with steganographic data.
285 Citations
18 Claims
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1. A method of decoding of steganographic data, the method comprising:
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processing, using a processor, a media signal to extract message values of the steganographic data, wherein the steganographic data is embedded in the media signal by imperceptibly adjusting data values in the media signal; assigning confidence values to the message values based in signal statistics by which the values are determined; and decoding a corrected message from the message values weighted by the assigned confidence values. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable medium having instructions stored thereon, that when executed by a computing device cause the computing device to perform operations comprising:
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processing a media signal to extract message values of the steganographic data, wherein the steganographic data is embedded in the media signal by imperceptibly adjusting data values in the media signal; assigning confidence values to the message values based in signal statistics by which the values are determined; and decoding a corrected message from the message values weighted by the assigned confidence values. - View Dependent Claims (14, 15, 16, 17, 18)
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8. A device for decoding of steganographic data, the steganographic data being embedded in an electronic media signal by imperceptibly adjusting data values in the media signal to create a steganographically embedded signal, the device comprising:
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a memory configured to store at least portions of a media signal; and a detector in communication with the memory configured to; process the media signal to extract message values of the steganographic data, wherein the steganographic data is embedded in the media signal by imperceptibly adjusting data values in the media signal; assign confidence values to the message values based on signal statistics by which the values are determined; and decode a corrected message from the message values weighted by the assigned confidence values. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification