Digital watermarking systems and methods
View Patent ↗The present invention relates watermarking compressed objects. 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.
1. A method of associating a watermark with a compressed video object, said method comprising:
decompressing the video object;
determining a digital watermark signal for the decompressed video object, but instead of embedding the 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.
2. The method of claim 1 , further comprising:
providing the associated video object and digital watermark object to a rendering device.
3. The method of claim 2 , wherein the rendering device is to decompress the video object and decompress the digital watermark object, and then embed the decompressed digital watermark into the decompressed video, the embedding occurring prior to rendering of the video.
4. The method of claim 3 , wherein the digital watermark comprises at least one of an orientation component and perceptual model of the video, and wherein the embedding is to use at least one of the orientation component or perceptual model.
5. The method of claim 4 , wherein the embedding is to use both of the orientation component and perceptual model.
6. The method of claim 1 , wherein the digital watermark object is to be detected independently of the video object.
7. The method of claim 1 , wherein the digital watermark object and the video object each comprise MPEG-4-based objects.
8. The method of claim 1 , wherein the digital watermark comprises a unique identifier.
9. A rendering device comprising:
an input;
an output;
electronic processing circuitry; and
electronic memory circuitry having executable instructions stored thereon, said instructions for execution by said electronic processing circuitry, said instructions comprising instructions to:
decompress compressed video received by said input;
decompress a compressed digital watermark received by said input, wherein the digital watermark corresponds to the video; and
steganographically embed the decompressed digital watermark into the decompressed video, the embedding occurring prior to or upon rendering of the video via said output.
10. The device of claim 9 , wherein the compressed video and the compressed digital watermark are received together at said input.
11. The device of claim 9 , wherein the digital watermark comprises at least one of an orientation component or perceptual model of the video, and wherein said instructions to steganographically embed employ at least one of the orientation component and perceptual model.
12. The device of claim 11 , wherein said steganographically embedding instructions employ both of the orientation component and perceptual model.
13. The device of claim 9 , wherein the compressed digital watermark and the compressed video each comprise MPEG-4-based objects.
14. The device of claim 9 , wherein the digital watermark comprises a unique identifier to identify at least one of the video and rendering device.
15. The method of claim 1 wherein the video object and the digital watermark object comprise separate objects.
16. The device of claim 9 wherein the compressed video and the compressed digital watermark comprise separate objects.