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1277 results about "Watermark" patented technology

A watermark stored in a data file refers to a method for ensuring data integrity which combines aspects of data hashing and digital watermarking. Both are useful for tamper detection, though each has its own advantages and disadvantages.

Content security layer providing long-term renewable security

In an exemplary embodiment, digital content is mastered as a combination of encrypted data and data processing operations that enable use in approved playback environments. Player devices having a processing environment compatible with the content's data processing operations are able to decrypt and play the content. Players can also provide content with basic functions, such as loading data from media, performing network communications, determining playback environment configuration, controlling decryption / playback, and / or performing cryptographic operations using the player's keys. These functions allow the content to implement and enforce its own security policies. If pirates compromise individual players or content titles, new content can be mastered with new security features that block the old attacks. A selective decryption capability can also be provided, enabling on-the-fly watermark insertion so that attacks can be traced back to a particular player. Features to enable migration from legacy formats are also provided.
Owner:ROVI SOLUTIONS CORP

Identification document and related methods

The present invention provides methods and systems for authenticating identification documents. We also teach an identification document including two or more digital watermarks. The watermarks correspond with each other or with indicia carried by the identification document. The correspondence can be verified to determine authenticity. We also provide digital watermark detection methods and systems to identify the different watermarks through embedded orientation components. We then focus watermark message-decoding efforts on areas identified as likely including watermark orientation components. In one implementation we provide a watermark detection trigger to identify so-called legacy documents. The trigger may indicate the presence or expected absence of a digital watermark. In other implementations we provide a versatile document authenticator to toggle between watermarking and non-watermarking authentication processes depending on a detection trigger.
Owner:DIGIMARC CORP

Authentication method and system

The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides a system and method for providing a dynamically reconfigurable watermark, and the use of the watermark to encode a stochastically variable property of the carrier medium for self-authentication purposes.
Owner:COPILOT VENTURES FUND III

Method for robust watermarking of content

One inventive aspect pertains to a watermarking mechanism that allows a watermark to be determined from only a part of the video sequence without human intervention and without reference to the original watermarked frames. This watermark has improved invisibility, detection reliability and robustness. Invisibility is improved through the inclusion of frame difference parameters to calculate the amplitude of the watermark. Detection reliability and robustness can be improved by assuring that opposite signed values for the pseudo-random number sequence are spatially near each other and using data blocks forming the data sets, respectively. Another inventive aspect pertains to a watermarking mechanism that is exclusively dependent on the data contained in the data sets and is completely interoperable between spatial and compressed domains.
Owner:INTEL CORP

Optimization methods for the insertion, protection, and detection of digital watermarks in digital data

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.
Owner:WISTARIA TRADING INC

Methods and apparatus for watermarking and distributing watermarked content

Methods and apparatus for generating and distributing watermarked content are described. Content to be distributed is sliced into a plurality of segments, e.g., short portions. Individual segments are subjected to watermarking with multiple watermarked versions of a segment being generated. Different watermarked versions of a segment communicate different information, e.g., one or more numbers. Sets of watermarked segments corresponding to a program are supplied to a content distribution device. Based on a session number or other information corresponding to the destination of the content, the content distribution device selects watermarked segments from the sets of segments to provide to the user. The combination of segments communicates, via the watermarks, a sequence of numbers used to identify the streamed content without requiring the distribution node to perform image processing to generate the watermarks. When the segments are communicated sequentially, the watermarks can be detected and the identifying numerical sequence extracted.
Owner:TIME WARNER CABLE ENTERPRISES LLC

Watermark payload encryption methods and systems

The present invention provides a method of securing messages steganographically embedded in media (e.g., printed or electronic objects, audio and video). In one implementation, a message includes a first portion and a second portion. The first portion includes a first message and a first checksum, which are encrypted with a private key. The encrypted first portion is combined with the second portion. The second portion includes a second message and as second checksum. The combined encrypted first portion and the second portion form a signature. The signature is encrypted with a common or universal key, perhaps after error correction coding. The private key is uniquely associated with an entity such as a document issuing jurisdiction. In another implementation, a method appends information to a watermark message received from a remote device. The information preferably corresponds to the remote device or to a user of the remote device. In yet another implementation, a method provides standardized watermark payloads from various input data, regardless of the size of the input data.
Owner:DIGIMARC CORP

Systems and methods for authenticating video using watermarks

Disclosed are blockchain-based methods and systems for watermarking digital content. In an exemplary aspect, a method for watermarking digital content is provided, by receiving, by a processor, a data stream comprising audio and / or video content; receiving watermark data, by a processor, from a computing node communicatively linked to a blockchain-based distributed ledger; and applying at least one watermark to the data stream based upon the watermark data, wherein the watermark comprises at least one hash based on one or more data blocks stored in the blockchain-based distributed ledger.
Owner:MIDCAP FINANCIAL TRUST

Watermarking

InactiveUS7130443B1Reliably embedded in pictureRendering detection simple and reliableTelevision system detailsUser identity/authority verificationVisibilityComputer science
A watermarking system and method is proposed for still or moving pictures in which a watermark is embedded robustly and simply into DC-values, but without causing unacceptable visible picture degradation. The watermark is secure and can be readily detected, and the method can be used to convey additional data. Also disclosed is a method for watermarking a sequence of pictures in which the visibility of artifacts is reduced. The watermark may carry data and may be used to label a program.
Owner:BRITISH BROADCASTING CORP

Applying informed coding, informed embedding and perceptual shaping to design a robust, high-capacity watermark

InactiveUS6996249B2Small distortionMinimize perceptual impactCode conversionCharacter and pattern recognitionAlgorithmPost embedding
A watermark message embedded in a cover work can be made robust to various types of post-embedding operations, while simultaneously minimizing perceptual impact on the cover work. This is accomplished by the informed coding of the watermark message to be embedded. This is also accomplished by the informed embedding of the watermark message code in the cover work. Finally, the watermark message code may be perceptually shaped to minimize impact on the fidelity of the watermarked work. Further, these techniques may be combined for maximum effect.
Owner:NEC CORP

Method for determining a partition in order to insert a watermark, and associated insertion and decoding methods

A method of determining a partition into distinct regions of a set of coefficients representative of at least a part of an image in order to insert a watermark comprises the following steps:generation (E501) of a centred pseudo-random sequence (w) equal in size to the cardinal number (N) of the said set of coefficients, formed from centred pseudo-random sub-sequences;modulation (E502) of the said set of coefficients by the said centred pseudo-random sequence (w) in order to insert the same information bit on the said set of coefficients; andchecking (E504–E508), over each region, of a criterion of detectability of the information bit inserted by modulation.Use especially for determining an adaptative partition as a function of a criterion of detectability of an information bit inserted on each region.
Owner:CANON KK

Spot color substitution for digital watermarking

The present disclosure relates generally to digital watermarking for spot colors. In one implementation a substitute spot color+CMY tint is selected to replace an original spot color. The CMY tint can be transformed to carry a digital watermark signal. Of course, other features, combinations and technology are described herein.
Owner:DIGIMARC CORP

Method of embedding digital watermark, method of extracting embedded digital watermark and apparatuses for the same

A color conversion module 42 carries out color conversion of original color image data Grgb from the RGB color system into the CMYK color system to obtain color-converted original color image data Gcmyk (step S104). A DCT module 44 applies DCT (discrete cosine transform) over the whole color-converted original color image data Gcmyk to generate DCT coefficients Dcmyk (step S106). An embedding module 46 embeds the watermark information s into the components C, M, Y, and K of the DCT coefficients Dcmyk (step S108). An IDCT module 48 applies IDCT (inverse discrete cosine transform) onto DCT coefficients D'cmyk with the watermark information s embedded therein to generate embedding-processed color image data G'cmyk (step S110). The color conversion module 42 carries out color conversion of the embedding-processed color image data G'cmyk from the CMYK color system into the RGB color system to obtain embedding-processed color image data G'rgb (step S112). This arrangement does not require any correction of the position or the shape of image blocks in the process of extracting the embedded watermark information.
Owner:KOWA CO LTD

Inlaying method and device of digital watermarks in text documents

The invention relates to an inlaying method and device of digital watermarks in text documents. The method comprises the steps that electronic form text documents are converted to EMF documents, the converted initial EMF documents are opened, document header parameter information is used for setting up corresponding target EMF documents, all GDI functions and parameter information of the GDI functions in the initial EMF documents are all searched, whether the DGI functions are TEXTOUT is judged, if yes, all font information is read and watermark information is inlaid, and then the GDI functions are copied to the target EMF documents, if not, the DGI functions are directly copied to the target EMF documents, and after all the initial EMF documents are processed, all target EMF documents inlaid with the watermark information are subjected to the final output conversion operation. According to the method and device, the problem of watermark information inlaying of various electronic form text documents and paper text documents is solved, and safety monitoring and controlling, source tracing and content protection of important text documents are achieved.
Owner:李晓妮

Method for the prior monitoring of the detectability of a watermarking signal

A method for the prior monitoring of the detectability of a watermarking signal inserted by modulation in a set of coefficients representing for example a digital image. The method comprises the step of simulating a distortion on the set of modulated coefficients, the distortion corresponding to a given compression level of the set of coefficients before modulation, determined by optimisation of a ratio of transmission rate to distortion. The method further comprises the step of calculating a detectability test on the set of modulated coefficients after distortion, and a step of comparing the detectability test with a threshold detection value. The method is used notably for inserting a watermarking signal during the compression of a digital image.
Owner:CANON KK

Information processing apparatus and processing method therefor

In an image processing apparatus which has an operating system (102) and scanner driver (103), is connected to a scanner (104) for reading an original and converting it into an image signal, and stores image data read by manipulating the scanner (104), a forgery determination processing module (103-2) of the scanner driver (103) compares the read digital watermark data with specific image data to determine the matching degree, and an anti-forgery control module (106) controls predetermined image processing on the basis of the determination result for the image data read by the scanner driver (103).
Owner:CANON KK

Location Based Mobile User Selected Time, Location, and Number Limited Automatic Location Based Reserve and Redeem Discounts on Products or Services with Automatic Security and Feedback Features

Methods, systems, software, computer readable non-transitory media, applications, devices, and the like for providing location based, mobile, user selected, time, location, and number limited or unlimited electronic coupon card selection of automatic location based reserve and redeem discounts on products or services with a profile picture, tag, motion enabled watermark, or other visual, 2D or mechanism for security purposes.
Owner:RANDELL JASON MATTHEW +1

Recorder for recording copy of production on the basis of copy attribute embedded as electronic watermark in the production, reproducing device for reproducing recorded copy, recorded medium, recording method, and reproducing method

A recording apparatus for recording a duplicate of a product onto a recording medium, the product being a copyrighted digital product having a copy attribute embedded as a watermark thereon and the recording apparatus including (a) an acquiring unit for acquiring the copy attribute embedded on the product, (b) a changing unit for changing the acquired copy attribute into a copy attribute showing no more copy when the acquired copy attribute shows one generation copy, (c) a reading unit for reading from the recording medium at least a part of medium ID information recorded on the recording medium in an unalterable state, and (d) a recording unit for recording onto the recording medium the duplicate having both the copy attribute showing no more copy and the read medium ID information embedded as a watermark thereon.
Owner:PANASONIC CORP

Image-based pose determination

A steganographic digital watermark signal is decoded from host imagery without requiring a domain transformation for signal synchronization, thereby speeding and simplifying the decoding operation. In time-limited applications, such as in supermarket point-of-sale scanners that attempt watermark decode operations on dozens of video frames every second, the speed improvement allows a greater percentage of each image frame to be analyzed for watermark data. In battery-powered mobile devices, avoidance of repeated domain transformations extends battery life. A great variety of other features and arrangements, including machine learning aspects, are also detailed.
Owner:DIGIMARC CORP
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