Watermark detection using a multiplicity of predicted patterns

摘要

Methods, devices and computer program products allow improved detection of watermarks into and from a multimedia content. One method for detecting watermarks from a host content includes performing watermark extraction to obtain a first sequence of watermark symbols from the host content and generating a plurality of predicted watermark templates. Each template corresponds to a sequence of watermark symbols that is predicted based on the first sequence of watermark symbols. A section of the host content is processed to obtain a candidate sequence of watermark symbols and correlation operations between the candidate sequence of watermark symbols and symbols of the predicted watermark templates are performed until a correlation result that is indicative of a successful watermark detection is obtained. An indication that the candidate sequence of watermark symbols represents at least a portion of a reliably extracted watermark message can then be produced.

主权项

1. A method for detecting watermarks from a host content, comprising:
performing watermark extraction to obtain a first sequence of watermark symbols from the host content; generating a plurality of predicted watermark templates, each template corresponding to a sequence of watermark symbols that is predicted based on the first sequence of watermark symbols; processing a section of the host content to obtain a candidate sequence of watermark symbols from the section of the host content; conducting correlation operations between the candidate sequence of watermark symbols and symbols of the predicted watermark templates until a correlation result that is indicative of a successful watermark detection is obtained; and producing an indication that the candidate sequence of watermark symbol represents at least a portion of a reliably extracted watermark message.