Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-03-22
2011-03-22
Smithers, Matthew B (Department: 2437)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C382S100000, C283S073000
Reexamination Certificate
active
07913087
ABSTRACT:
Disclosed herein are methods and systems for encoding digital watermarks into content signals. Also disclosed are systems and methods for detecting and/or verifying digital watermarks in content signals. According to one embodiment, a system for encoding of digital watermark information includes: a window identifier for identifying a sample window in the signal; an interval calculator for determining a quantization interval of the sample window; and a sampler for normalizing the sample window to provide normalized samples. According to another embodiment, a system for pre-analyzing a digital signal for encoding at least one digital watermark using a digital filter is disclosed. According to another embodiment, a method for pre-analyzing a digital signal for encoding digital watermarks comprises: (1) providing a digital signal; (2) providing a digital filter to be applied to the digital signal; and (3) identifying an area of the digital signal that will be affected by the digital filter based on at least one measurable difference between the digital signal and a counterpart of the digital signal selected from the group consisting of the digital signal as transmitted, the digital signal as stored in a medium, and the digital signal as played backed. According to another embodiment, a method for encoding a watermark in a content signal includes the steps of (1) splitting a watermark bit stream; and (2) encoding at least half of the watermark bit stream in the content signal using inverted instances of the watermark bit stream. Other methods and systems for encoding/decoding digital watermarks are also disclosed.
REFERENCES:
patent: 5822436 (1998-10-01), Rhoads
patent: 5832119 (1998-11-01), Rhoads
patent: 5862260 (1999-01-01), Rhoads
patent: 5889868 (1999-03-01), Moskowitz et al.
patent: 6522767 (2003-02-01), Moskowitz et al.
patent: 7107451 (2006-09-01), Moskowitz
Neifeld IP Law PC
Smithers Matthew B
Wistaria Trading, Inc.
LandOfFree
Optimization methods for the insertion, protection, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optimization methods for the insertion, protection, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimization methods for the insertion, protection, and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2729795