System and method of generating a per sale watermarking on digital files
AssigneeAT&T Intellectual Property II, L.P.
InventorThomas Killian
Life of this patent
Estimating the term…
Abstract
A system, method and computer readable media provided for watermarking a digital file. The method comprises altering samples of the digital file available for distribution upon request by adding a number such as +or a −1 to each sample of the digital file according to a probability value and compressing the digital file with the altered samples. Altering the sample of the digital file may be done on a per distribution or per sale basis.
Claims20
A method comprising:
- receiving a request from a user to purchase a digital file;
- identifying, via a processor, a unique watermark associated with the user;
- generating an altered digital file by associating the unique watermark with the digital file;
- and
- compressing the altered digital file such that a playback difference between an unaltered version of the digital file and the altered digital file is below a perception threshold.
A system comprising:
- a processor;
- and
- a computer-readable storage medium having instructions stored which, when executed on the processor, result in the processor performing operations comprising:
- receiving a request from a user to purchase a digital file;
- identifying a unique watermark associated with the user;
- generating an altered digital file by associating the unique watermark with the digital file;
- and
- compressing the altered digital file such that a playback difference between an unaltered version of the digital file and the altered digital file is below a perception threshold.
A computer-readable storage medium having instructions stored which, when executed on a computing device, result in the computing device performing operations comprising:
- receiving a request from a user to purchase a digital file;
- identifying a unique watermark associated with the user;
- generating an altered digital file by associating the unique watermark with the digital file;
- and
- compressing the altered digital file such that a playback difference between an unaltered version of the digital file and the altered digital file is below a perception threshold.
Dependencies are inferred from the claim text.