Watermark detection with payload

摘要

A method for 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 being, 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.

主权项

1. A method of 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 method comprising:
selecting a point in the content stream as an end of the first segment and a beginning of the second segment, sampling the content stream to obtain a first set of samples that is before the selected point and a second set of samples that is after the selected point, and detecting the watermark on a combination of the first set and a transformation of the second set, where the transformation exploits the relationship that exists between the different payloads in the first and second segments.