Digital watermarking systems and methods
AssigneeDigimarc Corporation
InventorsMarc D. Miller, Kenneth L. Levy, Geoffrey B. Rhoads
Life of this patent
Estimating the term…
Abstract
The present invention relates to digital watermarking systems and methods. In a first implementation, so-called movie studio rough-cuts are watermarked to provide a forensic tracking clue or to provide security for distributed rough-cuts. In another implementation, a watermark is determined for a compressed video object. The watermark is compressed as an object and the watermarked object is then associated with the compressed video object. The two separate objects are provided to a rendering device, which after decompressing both objects, embeds the watermark in the video prior to rendering.
Claims20
A method comprising:
- receiving a compressed video object;
- decompressing the compressed video object to yield a decompressed video object;
- determining a digital watermark signal for the decompressed video object, but instead of embedding a determined digital watermark signal in the decompressed video object, compressing the digital watermark signal as an object;
- and
- associating the digital watermark object and the compressed video object.
A method comprising:
- providing video content, wherein the video content comprises a digital watermark embedded therein, with multiple instances of the digital watermark embedded in the video content, the digital watermark further comprising a plural-bit identifier that is uniquely associated with an intended recipient of the video content;
- encrypting the video content with an encryption key that comprises mathematical relationship to the plural-bit identifier that is uniquely associated with the intended recipient of the video content;
- providing a decryption key that comprises a cryptographic relationship to the encryption key;
- providing the encrypted video content and the decryption key to the intended user of the video content;
- and
- maintaining a registry that associates at least the plural-bit identifier with the intended recipient.
An apparatus comprising:
- an input to receive a compressed video object;
- a module including circuitry or instructions to decompress the compressed video object to yield a decompressed video object;
- a controller to determine a digital watermark signal for the decompressed video object, but instead of embedding a determined digital watermark signal in the decompressed video object, the controller controls:
- i) compression of the digital watermark signal as an object, and ii) association of the digital watermark object and the compressed video object.
Dependencies are inferred from the claim text.