On Tuesdays the US Patent and Trademark Office (USPTO) issues new patents. Digital watermarking continues to be a hot topic. Assigned to Pantech Co. (KR), the first of today's Spotlight Patents concerns techniques for reorganizing wavelength division multiplexing network using dynamic watermarks. Assigned to ContentGuard Holdings, the second patent concerns techniques for multi-stage watermarking.
7,609,965, "Method for reorganizing wavelength division multiplexing network using dynamic watermarks," assigned to Pantech (KR).
Abstract
Disclosed is a method of reorganizing a wavelength division multiplexing network using dynamic watermarks and a computer readable recoding medium for storing a program for executing the same method. The reorganization method of organizing a wavelength division multiplexing (WDM) network using a dynamic watermark of the invention includes the steps a) collecting load information for optical paths of the WDM network from nodes on the optical paths; b) detecting optical paths having maximum load and minimum load from the collected load information and computing a maximum value and a minimum value based on the collected load information; and c) resetting an upper watermark and a lower watermark based on the maximum value and the minimum value.
7,609,848, "Multi-stage watermarking process and system," assigned to ContentGuard Holdings.
Abstract
A multi-stage watermarking system and process that creates a watermark specification which describes how to generate a watermark, generates a template specification which describes how to merge the watermark into a target document, generates the watermark based on the watermark specification, and merges the watermark into the target document based on the template specification to provide a watermarked document.
Abstract
Disclosed is a method of reorganizing a wavelength division multiplexing network using dynamic watermarks and a computer readable recoding medium for storing a program for executing the same method. The reorganization method of organizing a wavelength division multiplexing (WDM) network using a dynamic watermark of the invention includes the steps a) collecting load information for optical paths of the WDM network from nodes on the optical paths; b) detecting optical paths having maximum load and minimum load from the collected load information and computing a maximum value and a minimum value based on the collected load information; and c) resetting an upper watermark and a lower watermark based on the maximum value and the minimum value.
7,609,848, "Multi-stage watermarking process and system," assigned to ContentGuard Holdings.
Abstract
A multi-stage watermarking system and process that creates a watermark specification which describes how to generate a watermark, generates a template specification which describes how to merge the watermark into a target document, generates the watermark based on the watermark specification, and merges the watermark into the target document based on the template specification to provide a watermarked document.
