65results about How to "Low computational cost" patented technology

An efficient time scale modification (TSM) scheme for stereo signals is proposed where the overlap point is calculated just once per stereo frame based on a downmixed signal. The proposed scheme results in significantly lower computational cost compared with conventional methods: about 1.2 to 1.3 times the amount of computation required by monoaural signals, against 2.0 times the amount of computation required by channel-independent methods. Listening tests indicate that the quality achieved is higher than conventional channel-independent approaches due to the preservation of the spatial localization of the sound.

A method for a radar sensor for a motor vehicle, for angle estimation of radar targets based on an antenna diagram that indicates, for various configurations of radar targets, pertinent amplitudes and / or phase correlations between signals which are obtained for the relevant configuration in multiple evaluation channels of the radar sensor, wherein for a single real target, the occurrence of a number n of apparent targets, which are caused by reflection of the signal coming from the real target from elongated objects, is modeled mathematically; a correlation between the location angle of the real target and the location angles of the apparent targets is calculated; and to estimate the location angle of the real target, a multi-target estimate is performed in an n-dimensional search space and the search is limited to a sub-space that is determined by the calculated correlation.

The present invention relates to a system for identifying regions of interest in visual imagery. The system is configured to receive a series of consecutive frames representing a scene as captured from N sensors. The frames include at least a current frame and a previous frame. A surprise map can be generated based on features found in the current frame and the previous frame. The surprise map having a plurality of values corresponding to spatial locations within the scene. Based on the values, a surprise in the scene can be identified if a value in the surprise map exceeds a predetermined threshold.

An apparatus for use in video mixing of multiple video sources compressed in one or more video codecs includes a bitstream unpacker configured to receive and unpack each of the multiple video sources to provide intermediate video parameters including transform-domain coefficients, frame header information, macroblock header information, and motion vector data. The apparatus also includes an intermediate coefficient buffer coupled to the bitstream unpacker and a decision module coupled to the bitstream unpacker. The apparatus further includes a transform-domain coefficient downscaling module coupled to the intermediate coefficient buffer, a motion vector refinement module coupled to the bitstream unpacker, and a bitstream packer coupled to the decision module, the transform-domain coefficient downscaling module, and the motion vector refinement module. The bitstream packer is configured to output multiple video output streams in an output frame and the multiple output streams are compressed using the one or more video codecs.

A variable block size compressed sensing (CS) method for high efficiency depth map coding. Quad-tree decomposition is performed on a depth image to differentiate irregular uniform and edge areas prior to CS acquisition. To exploit temporal correlation and enhance coding efficiency, the quad-tree based CS acquisition is further extended to inter-frame encoding, where block partitioning is performed independently on the I frame and each of the subsequent residual frames. At the decoder, pixel domain total-variation minimization is performed for high quality depth map reconstruction.

A method for performing layout verification involves identifying feature centerlines in a mask layout, and then performing lithography simulation along the centerlines to generate a set of intensity distributions. At each local maxima or minima in the intensity distributions, further lithography simulation can be performed to determine an exposure pattern width at those local maxima / minima (check positions). The exposure pattern widths can then be evaluated to determine whether an actual pinch or bridge defect will be generated at those locations. If defect generation is likely (based on the lithographical simulation) at a particular location, the corresponding portion of the mask layout can be redesigned to avoid defect generation during actual production. In this method, accurate layout verification can be performed with a minimum of time-consuming lithography modeling.

The apparatus and method invented are operating upon a digital image signal obtained from an image sensor. The sensor is covered with different colored filters and is only able to record the color transmitted through each specific filter into the photosite or pixel. This type of sensor is known as a color filter array or CFA sensor. The different colored filters are arranged in a predefined pattern across the sensor. To obtain a full color image the missing color information is estimated by a set of weighed values obtained by an inverted gradient function. The set of weighted values is found from the neighboring pixels in the four compass directions, north, east, west and south or is found horizontally and vertically. The surrounding pixels are corrected by the chrominance channel to better fit the center pixel in the luminance channel, prior to using the gradient functions. The chrominance channel is interpolated in a similar manner and is also corrected to better fit the center pixel before the inverted gradient functions are applied.

A method and system to generate fine granular integrity to huge volumes of data in real time at a very low computational cost. The invention proposes a scalable system that can receive different digital data from multiple sources and generates integrity streams associated to the original data. This invention provides full guarantees for data integrity; the order of data logged cannot be altered and content cannot be modified added or deleted without detection.

The invention discloses a network distributed storage and reading method for a file. The method comprises the following steps of: determining the storage disaster recovery parameter index (n, k, t and sigma) of a storage system (N1, N2,..., Nn); constructing a file subblock matrix Gn*k and a file aggregation matrix Hn*(n-k); equally dividing the file into k data blocks after the file is transformed into a binary format; carrying out information coding on the k data blocks of the file according to the file subblock matrix Gn*k, thereby obtaining n coded data blocks; and storing the n coded data blocks into n different storage nodes of the storage system. Compared with the prior art, the method has the advantages that the complete information of the file can be read and recovered through randomly selecting any n-t storage nodes from the n storage nodes of the storage system, namely, the condition that any t storage nodes of the system are simultaneously broken down can be tolerated, so that the disaster recovery capability of distributed data storage can be remarkably improved, and the dependence on data redundancy and equipment redundancy of the storage system is reduced.

The present invention relates to a system and method to facilitate rendering of a collection of display items in a computationally efficient manner. In one aspect, a system for rendering a display is provided. The system includes a drawing component that determines visible items to display and a logic component that selectively defers layout of the visible items in a just-in-time manner. The logic component determines complexity of the visible items in order to defer the layout. This can include associating a flag with the visible items, wherein if the flag can be set true for complex items and the flag set false for non-complex items. The complexity can be determined by a threshold number of subcomponents or children objects that are associated with the visible items.

A method and apparatus for video sample interpolation with edge sharpening, whereby edge sharpness can be essentially preserved and / or enhanced in the interpolated image. Image interpolation for an original two dimensional image is conducted along the horizontal and vertical directions separately using a 1D digital filter. In interpolating a new sample in the image, the digital filter is first used to obtain a temporary interpolation value for the new sample. Then, an appropriate amount of edge enhancement is calculated for the new sample location. The enhancement value is combined with the temporary interpolation value to result in a final interpolation value for the new sample.

The invention belongs to the remediation filed of the polluted soil and in particular relates to an in-situ chemical remediation method of soil. The method comprises the following steps: (1) arranging an injection device; (2) injecting drug solution; (3) monitoring and adjusting; (4) repeating the above steps till the remediation of the soil is finished, wherein the injection device is arranged by using a board inserting machine; the injection device comprises an inner core and a permeation layer which coats the periphery of the inner core; the external surface of the inner core is provided with axial grooves and / or convex ribs; the permeation direction of the permeation layer is from inside to outside. Through the in-situ chemical remediation method of soil, the good injection effect can be guaranteed, the structure of the injection device is simplified, the construction speed of the arrangement of the injection device is improved, and the construction cost is lowered.

The invention relates to an AI face-changing video detection method based on a multi-task learning model, which belongs to the field of computer vision and deep learning, and comprises the following steps: pre-training a model based on multi-task learning to detect a modified face-changing video, and positioning a modified area for each query, the model is an automatic encoder and comprises a Y-shaped automatic decoder. A semi-supervised learning method is used for improving the generality of the network, valuable information is shared before multiple tasks, the sum of an activation loss function, a segmentation loss function and a reconstruction loss function is reduced, and an optimizer is used for optimization, so that the performance is improved. And for video input detection, averaging is performed on the probabilities of all frames to obtain the probability that the input is true or false. According to the method, AI face-changing video detection can be improved.

A sampling pattern covering an array of pixels for use in an anti-aliasing system is disclosed where each pixel has a pattern of sample points at the edges of the pixel. Moreover is the sample point pattern of each pixel a mirror image and different from the pattern of a directly neighboring pixel.

A method for verifying and / or preprocessing data packets received by a receiving device in a vehicle during wireless vehicle-to-environment communication includes: determining, in the receiving device, relevance of the received data packets; prioritizing, and verification and / or preprocessing according to their relevance, the data packets for the determination of the relevance depending on the distance between a transmitting device and the receiving device; and checking the signature of the transmitting device of the data packets and / or preprocessing the data packets in an order predefined by the prioritizing. The determination of the relevance also depends on the type of data packet and / or the type or position of the transmitting device, taking into account the position of the transmitting device based on another safety-relevant object.

An apparatus for solving a function, such as a mathematical function, may be configured to minimize cost indicators associated with solving the function. Embodiments may be used to compute, in a fast and efficient way, the results of a given mathematical function f(x) and to execute the required operations on the best possible computational elements available within the target platform. Embodiments may exploit a mixture of calculation / evaluation methods that can be implemented on each computational element of the platform in order to approximate the desired function within the desired degree of accuracy and at a low computational cost. Associated methods and computer program products may also be provided.

According to the invention, an excitation signal is generated as a result of sampled excitation values in order to excite an audio synthesis filter, the generated sampled excitation values being continuously stored in an adaptive codebook. A noise generator is provided which continuously generates random sampled values. A sequence of the stored sampled excitation values is selected from the adaptive codebook based on a fed audio fundamental frequency parameter by means of which a time gap between the sequence that is to be selected and the actual time reference is predefined. The excitation signal is generated by mixing the selected sequence with a random sequence encompassing actual random sampled valued of the noise generator.

Data from a target system (616) that exhibits a non-linear relationship between system properties and measurement data, is processed by applying a linear filter (F) to improve resolution and accuracy. The filter reduces inaccuracies that are introduced by an algorithm used to reconstruct the data. The filter is defined by assigning time varying functions, such as sinusoids (200), to elements (210) in a model (Y) of the system to perturbate the elements. The resulting data output from the model is reconstructed using the same algorithm used to subsequently reconstruct the data from the target system. The filter is defined as a matrix (F) that transforms the reconstructed data of the model (X) back toward the known properties of the model (Y). A library of filters can be pre-calculated for different applications. In an example implementation, the system is tissue that is imaged using optical tomography.

An object of the present invention is to provide an image restoration function which ensures physical accuracy, while reducing computational cost, by eliminating a division into local regions. The present invention provides an image processing apparatus including: an initial solution generating unit configured to generate an initial solution of a restored image and an initial solution of a transmittance distribution; and an iterative processing unit configured to receive input data on the generated initial solution of the restored image and input data on the generated initial solution of the transmittance distribution, and to repeat updating of one of the transmittance distribution and the restored image, using the transmittance distribution and the restored image, in such a way as to alternate the updating of the transmittance distribution with the updating of the restored image independently for each pixel.

The invention discloses a nanometer material plasticity modulus calculating method based on molecular dynamics simulation.The method comprises the following steps that a nanowire molecular dynamics simulation model is built; simulation parameters are set; stress-strain data of a nanometer material is calculated by adopting a molecular dynamics simulation method and output; a stress-strain curve is drawn through the stress-strain data; a first peak point and a first lower yield point on the stress-strain curve are found; a plasticity modulus value is solved according to the definition of the plasticity modulus.According to the method, the plasticity modulus at the nanoscale is solved through the molecular dynamics simulation method, therefore, not only is the calculating cost lowered, but also the calculating precision is improved, and meanwhile the calculating efficiency is improved compared with a physical experiment method.

The invention discloses an efficient and safe outsourcing big data audit method under a cloud environment, which is based on algebraic signature and exclusive-or homomorphic function, and adopts algebraic signature technology. Compared with the prior art, the invention has low calculation cost and communication cost. In addition, the invention introduces a trusted third-party auditor TTPA, which realizes large data integrity verification and effectively reduces the computational overhead of the data owner. The security proof shows that the proposed scheme can be proved to be secure under the security model. Performance analysis shows that compared with the existing scheme, the invention has less computational overhead for the server, and effectively reduces the communication cost in the calculation, storage and verification process of the verifier.

A user authentication system and method for a communications network is provided. The credential authority publishes an accumulator and issues tokens and credentials to the users who are authorized to access a service. The user computes by himself a derived credential based on the credential issued by the credential authority, and proves to the verifier using the derived credential. If a new user is authorized, other users and the verifier need not update any data. If a user ever authorized is banned, i.e., his / her token is revoked, the credential authority computes the updated accumulator based on the token issued to the banned user, and publishes a revocation increment data comprising the updated accumulator and the increment data about the revoked token. Other users compute their updated credentials by themselves based on the updated revocation increment data received. The revocation increment data can be published in several forms, and propagated among the credential authority, the users and the verifiers quickly.

A method for determining a control standard of an active steering device (10) of a vehicle (1) controllable by a control device (11). A driving dynamic of the vehicle (1) is influenced according to the control standard. The control standard is determined according to a nominal yawing rate calculated at least with reference to different actual operating parameters of the vehicle and one dynamic vehicle state determined according to the nominal yawing rate and actual operating state parameters. The control standard is superimposed on a steering transit angle preset by a driver so that an existing actual yawing rate is changed in direction of the nominal yawing rate.

The invention discloses an expressway accident detection and early warning system and method based on a short-time traffic flow, and the system comprises a plurality of short-time traffic flow collection devices which are arranged along an expressway at intervals and are used for collecting sound signals of corresponding detection points and carrying out the preprocessing of the sound signals, inputting the preprocessed data into a short-time traffic flow identification model for identification and statistics to obtain short-time traffic flow data, and wirelessly transmitting the short-time traffic flow data to an upper computer according to a preset time interval and an upper computer that is used for taking a preset continuous number of short-time traffic flow acquisition devices as a detection unit, dividing a detection road section into a plurality of detection intervals, and judging whether an accident congestion event occurs or not according to the change state of the short-time traffic flow data acquired by each short-time traffic flow acquisition device in each detection interval. Accidents can be rapidly detected in 24 hours without being limited by conditions such as weather, illumination, power supply and high-speed flow.

The invention relates to a valve train for an internal combustion engine with at least two cam shafts and a phase regulator (20), wherein the phase regulator (20) comprises a drive wheel (26), a first actuator which is connected to a first of the cam shafts, and a second actuator which is connected to a second of the cam shafts. By adjusting the first and / or the second actuator, a phase angle of the respective cam shaft can be adjusted relative to the drive wheel (26). Said valve train is characterized in that the adjustment of the second actuator is implemented based upon the adjustment of the first actuator.