Patent ID: 6798893
Filing Date: 2004-09-28
Classification: G06T,H04N

Abstract:
A method for inserting a watermark into a selected block of frequency component data in a picture of data having one of a plurality of picture types, comprising the steps of:determining a picture type of the selected block of frequency component data; determining a watermark level depending on the picture type of the selected block of frequency component data; and inserting a watermark having the watermark level into the selected block of frequency component data, wherein the picture types are Intra-frame coding picture (hereafter, I-picture), Inter-frame Predictive coding picture (hereafter, P-picture) and Bidirectionally Predictive coding picture (hereafter, B-picture), wherein a relative proportion of watermark levels of I-picture, B-picture, and P-picture is 10:7:5.