638 results about "Information embedding" patented technology

An apparatus for embedding information comprises: a blocking step for dividing data to be processed into blocks; an orthogonal transform step for obtaining coefficients by carrying out orthogonal transformation for each block; an embedding coefficient selecting step for determining coefficients in which the watermark-information will be embedded by using a random sequence which is generated by initial value; an information embedding step for sequentially embedding the watermark-information, which has arbitrary length of bits, by quantizing value of said coefficients using a predetermined value for quantization; and an inverse orthogonal transform step for carrying out inverse orthogonal transformation for modified coefficients to form block in which the watermark-information is embedded, as well as combining the divided blocks and reconstructing the original form.

A multimedia data distributing system comprising an ID issuing center side device and a multimedia data distributor side device for distributing multimedia data as electronic data to a purchaser of the multimedia data. The multimedia data distributor device includes: an attribute information transmitting unit that transmits attribute information of the electronic data indicating the multimedia data to be distributed, to the ID issuing center side device; a watermark information embedding unit that embeds information specifying the ID number transmitted from the ID issuing center side device in response to the attribute information transmitted to the attribute information transmitting unit, as an watermark information in the electronic data indicating the multimedia data to be distributed; and a distribution unit that distributes the electronic data indicating the multimedia data, in which the information specifying the ID number is embedded as the watermark information by the watermark information embedding unit, to the purchaser of the multimedia data. The ID issuing center side device includes: an ID number generating unit that generates a unique ID number and registering the generated ID number in a database in a manner to correspond to the attribute information transmitted by the distributor of the multimedia data; and an ID number transmitting unit that transmits the information specifying the generated ID number to the multimedia data distributor device.

Methods are provided for embedding auxiliary information in a host content signal which reduce the memory, bandwidth and computational complexity of the embedding and transmission systems. In one embodiment, a first reduced-scale signal is produced which corresponds to the host content embedded with a first logical value and producing a second reduced-scale signal corresponding to the host content embedded with a second logical value. A first set of segments from the first reduced-scale signal may be combined with a second set of segments from the second reduced-scale signal in a pre-defined manner to produce a composite embedded host content. Thus the storage and transmission requirements of the watermarking system are reduced to having to deal with only the original content plus two reduced-scale signals.

A digital image signal is transformed in frequency, thereby providing partitioned frequency components. Characteristic information is calculated in accordance with a coefficient at a first frequency domain that is selected from among the partitioned frequency components. A coefficient at a second frequency domain is handled in accordance with predetermined rules, thereby embedding the characteristic information into the coefficient at the second frequency domain. The second frequency domain is selected from among areas that differ from the first frequency domain. The frequency coefficients that exhibit several frequency components are encoded in a predetermined manner, thereby producing compressed image data.

Auxiliary information (150) representing binary or multi-level (M≧2) logical values is embedded into successive segments (110) of an audio, video or other data signal in response to a user request to download the data signal via an on-line distributor (350) on a computer network such as the Internet. To avoid unnecessary delays in providing the data signal to the user, the data signal is pre-processed to provide two sets or copies of data (230, 235). One set (230) of the data contains segments with an embedded binary “0”, while the other set (235) contains corresponding segments with an embedded binary “1”. Successive segments are selected from one of the two sets to provide a time-multiplexed composite data signal (230) that has the desired content, but with an embedded binary data sequence that identifies the user.

A management device 10 of a license management system 1 acquires a usage request of a content from an SD card 40 or a printer 50 via a relay device 30, analyzes the acquired usage request, acquires usage environment information of the SD card 40 or the printer 50 from the relay device 30, analyzes the acquired usage environment information, generates license information including a usage rule corresponding to the analysis results of the usage request and the usage environment information, generates instruction information indicating how to handle the license information in the relay device based on the analysis result of the usage environment information, embeds the generated instruction information in the license information, and sends the license information to the relay device 30. The relay device 30 receives the license information in which the instruction information is embedded, and transfers the received license information to the SD card 40 or the printer 50 according to the instruction information which is embedded in the license information with performing certain processing or without performing any processing to the license information.

The invention belongs to the field of computer vision video motion identification, and discloses a human behavior identification method based on a 3D deep convolutional network. The human behavior identification method comprises the steps of: firstly, dividing a video into a series of consecutive video segments; then, inputting the consecutive video segments into a 3D neural network formed by a convolutional computation layer and a space-time pyramid pooling layer to obtain features of the consecutive video segments; and then calculating global video features by means of a long and short memory model, and regarding the global video features as a behavior pattern. The human behavior identification method has obvious advantages, can perform feature extraction on video segments of arbitrary resolution and time length by improving a standard 3D convolutional network C3D and introducing multistage pooling, improves the great robustness of the model to behavior change, is conductive to increasing video training data scale while maintaining video quality, and improves the integrity of behavior information through carrying out correlation information embedding according to motion sub-states.

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.

There are provided a watermark information embedding device and a watermark information detection device which can correctly extract classified information. In the watermark information embedding device, a plurality of dot patterns the wave directions and/or wavelengths of which are changed depending on dot arrangements are prepared, one symbol is given to one of the dot patterns, and the dot patterns are combined and arranged, so that the classified information is given. The watermark information detection device includes two-dimensional wavelet filters the number of which is equal to the number of dot patterns and which have the same wave directions and the same wavelengths as those of the dot patterns. Convolutions between an arbitrary region in a watermarked image and the plurality of two-dimensional wavelet filters are calculated, and it is determined that the dot pattern corresponding to the two-dimensional wavelet filter having the maximum convolution is embedded in the region.

An embedding area in which a background pattern can be embedded from the color document image is extracted. At least one of a color and a shape of a background pattern appropriate for the embedding area is determined depending on an area color of the embedding area. A background pattern image is generated by embedding watermark information in the embedding area using the determined background pattern.

A system for embedding auxiliary digital information into a primary digital signal to form a composite digital signal. Auxiliary data bits modulate a pseudo-random (e.g., PN) sequence to provide an auxiliary data sequence used to modify the Least Perceptually Significant Bits (LPSBs) of successive multi-bit samples of the primary signal. In a cross-term compensation embodiment, a correlation between the PN sequence and the sample bits is determined, and compared to the auxiliary data bits to determine whether there is a desired correspondence. The LPSBs in the samples are toggled, if necessary, to provide the desired correspondence. The selection of LPSBs to modify accounts for a desired noise level of the auxiliary data in the primary signal. LPSBs may be modified based on a sparse PN sequence to achieve the desired noise level and conceal the presence of the auxiliary data.

The invention discloses a voice secret communication system design method based on compressive sensing and information hiding, comprising the following steps: embedding secret voice into carrier voice by an embedded system to obtain mixed voice; designing a compressive sensing overcomplete dictionary aiming at the voice signal; sampling the secret voice by a compressive sensing self-adaption observation matrix to obtain a observation vector for reducing dimensions; quantizing the observation vector by an LBG (Linde-Buzo-Gray algorithm) vector, taking the quantized observation vector to serve as secret information to embed into the carrier voice, and carrying out two-stage transform on the carrier voice to obtain mixed voice; extracting the secret voice from the mixed voice by an extraction system; carrying out discrete cosine transform on mixed voice, and improving wavelet transform two-stage transform to obtain a wavelet transform coefficient; obtaining a secret bit stream by a scalar Costa decoding algorithm; obtaining a reconstructing observation vector by an LBG vector quantization decoder; reconstructing the secret voice by a compressive sensing orthogonal matching pursuit algorithm; and improving the quality of the reconstructed secret voice with a wavelet denoising method.

The invention relates to a JPEG image information hiding based private information communication method and system. The system comprises a preprocessing module used for converting to-be-transmitted information into binary data, an encryption/decryption module used for generating an information hiding key by a password input by a user, an information hiding module used for embedding the converted binary data into a carrier JPEG image, a transmission module for transmitting and sharing the JPEG image embedded with the binary data information, and an information extraction module used for extracting the binary data in the image embedded with the binary data information, wherein the information hiding module comprises an entropy decoding module, an information embedding module and an entropy encryption module. The invention provides a complete multi-morphological information hiding core algorithm taking an image as a medium and a communication solution. The private information communication method and system have important theoretical and application values.

The image partitioned to small pieces in space domain and each small pieces scrambled by using chaos mapping are carried out. Carrier image data in each piece is decomposed into 'residual image block' and 'quotient image block'. Watermark information is encrypted and carried out direct sequence spread spectrum by using chaos sequence. The processed watermark information is embedded to the 'residual image block'. After processing the data of crossing the border, each 'residual image block' and corresponding 'quotient image block' is assembled. The image with the watermark embedded is obtained by assembling each anti-scrambled block with chaos mapping. When picking-up watermark, the cryptic watermark information is recovered after operations of scrambling, demodulating and threshold decision are carried out.

The invention relates to an information embedding and interaction system facing real-time communication and a method. The system at least comprises a client end, a server and an information database, wherein the client end comprises a keyword identification unit, a display unit and an interaction display meter; the server comprises a keyword matching unit for keyword matching and an interaction operational unit; and the information database is used for storing a large amount of data information. The system is designed to better provide services for real-time chatting users and information and overcome defects of the existing information embedding technique. Information of the services can be stored in the information database through keywords, accurate search can be achieved through matching of the keywords with the information stored in the information database, and thus cluttered information can be avoided.

This invention has as its object to embed information in a document by a plurality of different methods, and verify the information embedded by the respective methods to determine the relationship with a master. To this end, a method of this invention includes an image data input step of inputting image data, a document data input step of inputting document data, an additional information input step of inputting additional information, a determination step of determining whether or not the additional information can be embedded in the document data, a region segmentation step of segmenting the image data into first and second regions in accordance with the determination result of the determination step, a first additional information embedding step of embedding the additional information in the first region, a second additional information embedding step of embedding the additional information in the second region, a composition step of compositing the image data and document data embedded with the additional information, and an image output step of outputting the image data composited in the composition step.

The invention discloses a commodity name recognition method based on a full-text attention mechanism. The method comprises the following steps: establishing a depth neural network model with a full-text attention mechanism; adding a full-text attention layer into the depth neural network model; in the full-text attention layer, the full-text information being represented by a method of embedding aword into a vector; the full-text attention layer being represented by a full-text information embedding vector. Then, for each word to be annotated, the similarity between them and the full-text attention-level word vector is calculated, so that the word can obtain the 'attention weight' of the full-text, that is, the word can focus on the context information of the document, and the additionalfeatures of each word can be calculated by using the sum of the attention-level weight, so as to identify the trade name. The method of the invention can effectively extract commodity names from irregular texts, solves the problem of inconsistent identification of the same commodity in context, and improves the accuracy of identification.

The invention provides a reversible watermark method based on histogram shifting and has significant practical values for protecting multimedia copyrights. By means of the reversible watermark method, traditional histogram shifting algorithms are improved in two aspects, firstly, 1 and 0 in a bite map are more imbalanced by arranging a generation process of the bit map on watermark embedding rather than in a non-pretreatment stage, so that compression is easier, and embedding capacity is improved; and secondly, the reversible watermark method is a two-step embedding method. The watermark blind extraction is achieved and troubles that the histogram shifting method needs extra side information transmitting are solved by dividing an image into an upper large area and a lower large area, subjecting the upper area to the watermark embedding, embedding the generated side information into the lowest significant bit containing watermark pixels in the area, and embedding the left watermark information and the replaced lowest significant information into the lower area.

The invention discloses a document watermark copyright information protection device based on Opentype vector outline fonts, belongs to the fields of digital watermark technologies and document information protection in information safety, and aims to solve the problems of low robustness and complexity in operation of the conventional document watermark technology caused by conversion of a document into an image before a watermark is embedded. A font library management center module manages original standard font library information in which watermark information is not embedded, and provides comparison information; a document watermark copyright information embedding module generates specific watermark characters through selected Opentype fonts and embedded copyright information; a document watermark copyright information extraction module extracts the copyright information according to comparison parameters; a printed document pre-processing module scans a printed document, and performs image binarization, de-noising, positioning and refining to form continuous single-pixel curves; and a document watermark copyright information anti-scanning printing detection module extracts stroke parameters. The document watermark copyright information protection device based on the Opentype vector outline fonts is applicable to protection of document watermark copyright information.

The present invention relates to an additional information embedding method for embedding additional information into an audio signal, in which the audio signal is MDCT-transformed to calculate an MDCT coefficient and the calculated MDCT coefficient is damped, shifted in the direction of the frequency axis and added to the original MDCT coefficient, thereby embedding the additional information as a watermark into the audio signal.

The invention belongs to an information steganography method by taking compressed video as a carrier in the field of communication and information security. The method is characterized by using VLC encoding list in ISO/IEC 13818-2 standard in the realization process to preconstruct a group of increase/decrease pair value tree AST, selecting a certain leaf node of AST in information steganography to automatically guide the operation of an embedding method, thus the size of a compressed video file does not change remarkably before and after information embedding, and the transparency of a video steganography method is ensured. The information embedding and extraction operations of the method are performed completely in VLC domain, thereby avoiding decoding and recoding processes aiming at compressed video stream and meeting the real-time requirement of the video steganography method.

The invention provides a self-adaption covert communication method based on satellite channel coding, and directing at different channel encoding algorithms of block codes, RS codes, convolutional codes, serial concatenated code and the like, provides a capacity self-adaption method for secrete information embedding; further provides a channel encoding information embedding and extracting algorithm based on m sequences. By the utilization of the self-adaption covert communication method, the capacity of covert channels can be determined in a self-adaption mode according to different used channel encoding algorithms and different used communication environments; normal use of carriers containing secretes is not influenced, and main steganalysis attacks such as chi-square analysis attacks and RS analysis attacks can be resisted; under the condition that the satellite channel bit error rate is 10-3-10-5, quasi error-free transmission of secrete information can be realized.

The invention relates to method and device for embedding and detecting a watermark in a document by using a computer system, in particular to method and device for loading a document watermark to an electronic text document by using a computer program so as to protect the electronic text document, belonging to the technical field of document protection. The computer program at least comprises the generation of the electronic text watermark, the loading and embedding of the watermark and the detection of the watermark. The method comprises the following steps of: firstly, generating watermark information from copyright information prepared to be added into the electronic document by using a watermark generating module; then, reasonably optimizing the analysis of a watermark carrier medium, the preprocessing of embedded information, the selection of an information embedding point, the design of an embedding mode and the control of embedding modulation by using a watermark loading and embedding module; and equivalently transforming set natural language semantics to embed the watermark through reasonably selecting a secret key. If a copyright dispute happens, a watermark detection module designed in the invention can be used for detecting and extracting the document watermark of the electronic document by using the preset secret key, and the result shows that the document watermark embedded in advance can provide an identification basis for solving the electronic document copyright dispute. Thus, the invention can be widely applied to document protection encryption, tracking, illegal distribution control and technical protection of copyrights.

The invention relates to a self-adaptation reversible watermarking method used for medical image authentication and doctor-patient information hiding and used for integrity authentication of medical images and achievement of hidden communication of doctor-patient information. According to the method, original medical images are blocked, embedding intensity is selected according to requirements of watermarking embedding capacity, and large-capacity, self-adaptation and invisible watermarking information embedding is achieved on a peak point in a block difference histogram through a displacement method. Watermarking information includes doctor-patient information and auxiliary information, and hidden communication of diagnosis information of doctors and personal information of patients is achieved. By extracting the watermarking information at a detection end, integrity authentication of the images is achieved, and the original medical images and the doctor-patient information can be restored in a lossless mode. The method is low in algorithm complexity, high in safety and high in practicality.

The invention provides an adaptive spatial steganographic method based on adjacent pixel difference. The method comprises the following two steps: embedding secret information and extracting the secret information. The method takes three continuous adjacent pixels in an image as an embedding unit and reaches the goal of hiding information by changing the value of the middle pixel in each unit. During information embedding, a steganographic algorithm always mains the size relationship of each pixel in the embedding unit, and adaptively adjusts the capacity of embedding information through a parameter according to the content of the image. Experiments show that the adaptive spatial steganographic method has higher safety and adaptive ability compared with the prior steganographic method based on pixel difference. Therefore, the adaptive spatial steganographic method has great practical significance to application fields such as covert communication and the like.