New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of digital watermarking. Assigned to Amazon, the first patent addresses techniques for watermarking media assets at the network edge, Assigned to MobiTV, the second patent addresses techniques for watermarking of images.
9,292,896, "Watermarking media assets at the network edge," assigned to Amazon.
Watermarking techniques are described which can be performed at network edge locations such as a Content Delivery Network (CDN) point-of-presence (POP). An edge server can identify users by request and apply a watermark based on the user to media content stored locally. Performance is improved by moving the watermarking from a central location closer to the user in terms of network proximity. An edge server can receive instructions on what type of watermark to assign and how to assign it. The edge server can use requester's identity to create and apply watermarks at the time of transferring media content to the requester. Individualized watermarking is applied to the bits transmitted to the device, the watermark indicating the specific user downloading the stream, time of transmission, etc. Watermarking can be applied throughout all of the frames of the media content rather than merely attaching it at a specific place.
9,292,897, "Watermarking of images," assigned to MobiTV.
Techniques and mechanisms described herein facilitate the watermarking of images. According to various embodiments, a watermark image to apply to a digital image is identified. The digital image may include a plurality of image pixel data values. Each of the image pixel data values may designate a color of a corresponding pixel in the digital image. The watermark image may include a plurality of watermark pixel data values. Each of the watermark pixel data values may designate a color change to a corresponding pixel. The watermark image may be of relatively low frequency and may exhibit relatively gradual transitions and relatively constant color tone. The watermark image may be superimposed on at least a portion of the digital image to create a watermarked digital image.