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US 6,760,463 B2Granted
Watermarking methods and media
AssigneeDigimarc Corporation
InventorGeoffrey B. Rhoads
Life of this patent
Estimating the term…
Abstract
Audio and image (including video) content data is watermarked by processes that take into account human perception attributes of the content. Some methods assess the input content data to discern inherent biases, and tailor the watermarking to exploit such data characteristics. Other methods make use of a trial-encoding process to determine how the watermark survives corruption—such as compression—and tailor the watermarking accordingly. A great variety of other techniques are also disclosed.
Claims14
A method of processing audio or video data, comprising:
- providing input content data, the content data representing audio or video and comprising plural samples, each having a value;
- providing plural symbol auxiliary data that is to be steganographically encoded within the content data, to yield encoded content data;
- receiving first data related to human perception attributes of the content data;
- generating intermediate data that is a function of said plural symbol auxiliary data and said first data, the intermediate signal including an element corresponding to each of plural of the content data samples;
- steganographically encoding the content data with the auxiliary data by changing the values of samples in a version of the input content data in accordance with elements of the intermediate signal corresponding thereto, thereby yielding the encoded content data;
- the method further including:
- assessing the input content data to discern biases inherent therein;
- and
- if a bias tends towards a change that would be made by said encoding, then changing the content data relatively less in correspondence thereto.
6 more elements
A method of processing audio or video data, comprising:
- providing input content data, the content data representing audio or video and comprising plural samples, each having a value;
- providing plural symbol auxiliary data that is to be steganographically encoded within the content data, to yield encoded content data;
- receiving first data related to human perception attributes of the content data;
- generating intermediate data that is a function of said plural symbol auxiliary data and said first data, the intermediate signal including an element corresponding to each of plural of the content data samples;
- steganographically encoding the content data with the auxiliary data by changing the values of samples in a version of the input content data in accordance with elements of the intermediate signal corresponding thereto, thereby yielding the encoded content data;
- the method further including:
- assessing the input content data to discern biases inherent therein;
- and
- if a bias tends away from a change that would be made by said encoding, then changing the content data relatively more in correspondence thereto.
6 more elements
A method of processing audio or video data, comprising:
- providing input content data, the content data representing audio or video and comprising plural samples, each having a value;
- providing plural symbol auxiliary data that is to be steganographically encoded within the content data, to yield encoded content data;
- receiving first data related to human perception attributes of the content data;
- generating intermediate data that is a function of said plural symbol auxiliary data and said first data, the intermediate signal including an element corresponding to each of plural of the content data samples;
- steganographically encoding the content data with the auxiliary data by changing the values of samples in a version of the input content data in accordance with elements of the intermediate signal corresponding thereto, thereby yielding the encoded content data;
- the method further including:
- receiving first content data that has been steganographically trial-encoded;
- corrupting the trial-encoded content data;
- assessing a result of said corruption;
- and
- providing information obtained through said assessment to a subsequent process that is to steganographically encode the content data.
8 more elements
Dependencies are inferred from the claim text.