US 9,805,436 B2Granted

Watermark detection with payload

AssigneeCivolution B.V.

InventorsMartijn Maas, Mehmet Celik

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Abstract

A method of detecting a payload embedded using watermarking in a content stream, the payload being different in a first and a second segment of the content stream, a payload in the second segment having a predetermined relationship with a payload in the first segment, is described. The method selects a point in the content stream where the first segment is likely to end and the second segment to begin, samples the stream to obtain a first set of samples that is before the chosen point and a second set of samples that is after the chosen point, and detects the payload on a combination of the first set and a transformation of the second set, where the transformation is based on the assumption that the second set is from the second segment and exploits the relationship that exists between the payloads in the first and second segments.

Claims10

Dependent claims

A watermark detector for detecting a watermark embedded in a content stream, the watermark having a watermark pattern and a payload encoded in the watermark pattern, a payload encoded in the watermark pattern in a first segment of the content stream being different from a payload encoded in the watermark pattern in a second segment of the content stream, the payload in the second segment of the content stream having a predetermined relationship with the payload in the first segment of the content stream, the watermark detector comprising:

a splitter, for selecting a point in the content stream as an end of the first segment and a beginning of the second segment,
a first sample accumulator, for obtaining a first set of samples of either one of the first segment and the second segment with respect to the selected point in the content stream,
a first feature extractor, for extracting from the first set features in which the watermark for the payload is embedded,
a watermark payload mapper, for transforming a detection pattern correlating with features in which the watermark for the payload is embedded of a second set of samples of another of the first segment and the second segment with respect to the selected point and different from the segment from which the first set is obtained, providing a transformed set of features by exploiting the relationship that exists between the different payloads in the first and second segments, and
a detector, for detecting the watermark from features of the first set and features of the transformed set.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/362,738Filed 28 Nov 2016 · continuation
Priority: NL 200755710 Oct 2011
Published: US 2017/0236240 A117 Aug 2017
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06T 1/0071
Robust watermarking, e.g. average attack or collusion attack resistant: using multiple or alternating watermarks
G06T 1/0021
General purpose image data processing: image watermarking
G10L 19/018
Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals,…:…
H04N 21/8358
Generation of protective data, e.g. certificates: involving watermark

Family

Application61/545,240Us provisional application · filed 10 Oct 2011
PCT/NL2012/050700Parent of this continuation · filed 9 Oct 2012
US 2017/0236240 A1Pre-grant publication · published 17 Aug 2017
Application14/350,793Parent of this continuation
US 9,514,505 B2Parent of this continuation
US 2014/0270340 A1Published application
US 9,805,436 B2This patent

From the US filing history. Foreign family members aren’t listed.