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Method and arrangement for embedding watermark in information signal

A technology for embedding watermarks and signals, applied in digital video signal modification, simultaneous/sequential multi-TV signal transmission, image communication, etc., can solve problems such as low visibility of distortion, high noise sensitivity level, etc.

Inactive Publication Date: 2003-04-16
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] - texturally, distortion visibility is low, i.e. a region of solid texture has a high noise sensitivity level;

Method used

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  • Method and arrangement for embedding watermark in information signal
  • Method and arrangement for embedding watermark in information signal

Examples

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Embodiment Construction

[0035] in the attached figure 1 In, an embedder for embedding a watermark in an information signal is illustrated. The embedder comprises: an image source 11, which produces an information signal P; a parameter determination device 16, which is used to determine a weighting factor λ(P) and an overall depth parameter d; a modulator 17, which is used to utilize the weighting factor λ (P) modulated watermark W; a multiplier 18 for multiplying the modulated watermark W(P) by the overall depth parameter d; and an adder 12 which adds a watermark W to the information signal P resulting in a watermark Information signal Q. The resulting watermark information signal Q can be stored on a storage medium 50 .

[0036] exist figure 2 , the parameter determination means 16 are shown in more detail. The parameter determination means 16 comprises: a scene change detection means 161, which takes the information signal P as its input and is connected to a weighting factor determination mea...

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PUM

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Abstract

The invention relates to a method of embedding a watermark W in an information signal P, to a corresponding arrangement for embedding a watermark W in an information signal P, to an information signal P with an embedded watermark W and to a storage medium 50 having stored thereon an information signal P with an embedded watermark W. This method is carried out by determining local weight factors lambd(P) for said watermark based on data of said information signal P, wherein said local weight factors lambd(P) are determined such that the embedded watermark W is rendered substantially imperceptible when embedded in said information signal. The watermark W is locally weighted using said determined local weight factors lambd(P). Then said locally weighted watermark is embedded in said information signal P. When determining said local weight factors lambd(P) of said watermark W temporal data of said information signal are taken into account.

Description

field of invention [0001] The present invention relates to a method and a device for embedding a watermark in an information signal, an information signal with an embedded watermark, and a storage medium on which the information signal with an embedded watermark is stored. Background of the invention [0002] The aforementioned digitization of multimedia data has had a dual effect. While on the one hand faster and more efficient storage, transfer and processing of signals have been achieved, on the other hand the duplication and control of such signals has also become very simple and imperceptible. With the development of computer networks like the Internet, the security involved in copyright infringement of multimedia data has also increased, which enables fast and error-free action of any unauthorized copying and possible manipulation of copying multimedia information. There is therefore a need to maintain some sort of copyright information in such a public environment. ...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T7/20H04N1/387H04N7/08H04N7/081H04N19/467
CPCG06T2201/0081G06T1/0085H04N21/23892H04N21/8358G06T2201/0202H04N7/26372H04N19/00557G06T1/0028H04N19/467H04N5/913
Inventor G·F·G·德波维雷J·A·海特斯马A·A·C·M·卡尔克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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