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.

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.

Abstract: Methods for embedding digital watermarks in compressed video include perceptual adapting a digital watermark in predicted and non-predicted data based on block activity derived from the compressed video stream, embedding in predicted objects in a video stream having separately compressed video objects, and bit rate control of watermarked video.

Abstract: The present invention is directed to a system that includes a signal feature estimator module configured to derive a plurality of signal feature estimate values from a received signal. An inner symbol alignment decoder is coupled to the signal feature estimator module. The inner symbol alignment decoder is configured to generate N probability vectors from the plurality of signal feature estimate values using a predetermined marker vector. N is an integer estimate of a number of symbols in a codeword corresponding to an watermark message that may or may not be embedded in the received signal. An outer soft-input error correction decoder is coupled to the inner decoder. The outer decoder performs a series computations and generates an estimated watermark message based on the N probability vectors. The watermark message is used to communicate data and/or to authenticate the received signal.

Abstract: Methods for embedding digital watermarks in compressed video include perceptual adapting a digital watermark in predicted and non-predicted data based on block activity derived from the compressed video stream, embedding in predicted objects in a video stream having separately compressed video objects, and bit rate control of watermarked video.