Abstract: The invention relates to a method for testing an air traffic management electronic system. The method includes receiving by the system of input data representative of a state of air traffic and establishing by the system of information related to air traffic as a function of the input data and delivery of the information to an electronic test device of the system. The method further includes determining by the electronic test device, as a function of the delivered information, of air traffic control instructions and providing said system with the instructions and receiving and processing of the instructions by the system.

Abstract: In the field of air traffic control, a method is provided to determine a processing complexity of an ATC situation. For this purpose, the method includes grouping parameters of the paths by pairs of paths in a matrix, applying to this matrix a transformation aiming to concentrate the energy, then calculating the complexity index of the ATC situation as a function of the concentration level of the energy per component.

Abstract: A computer-implemented method is provided for training a supervised machine learning engine able to predict characteristics of aircraft trajectories from parameters of an aircraft, and environment parameters of the aircraft trajectory. A system able to train the supervised machine learning engine, a system for using the engine, and a computer-implemented method for using the engine are provided. The methods and systems provided are particularly useful for air traffic flow management applications.

Abstract: A computer-implemented method includes receiving a trajectory request from an unmanned aerial vehicle, the request comprising: an initial point; a final point; at least one manoeuvrability parameter of the unmanned aerial vehicle; computing a plurality of optimized 4D trajectories between the initial point and the final point, complying with the at least one manoeuvrability parameter, and avoiding obstacles in an airspace, each 4D trajectory being associated with a performance score; a flight simulator simulating the plurality of 4D trajectories in order of decreasing performance score, until a 4D trajectory is considered to be flyable by the flight simulator; sending the trajectory considered to be flyable by the flight simulator to the unmanned aerial vehicle.

Abstract: The embodiments of the invention provide a device for predicting the value of a variable intended to be used by a computer-implemented control system, the variable depending on multiple parameters, the parameters comprising a non-explicit parameter. Advantageously, the prediction device comprises a first neural network-based predictor configured so as to compute an estimate of the non-explicit parameter and a second neural network-based predictor configured so as to compute an estimate of the value of the variable from the estimate of the non-explicit parameter, the two predictors receiving an input dataset, each neural network being associated with a set of weights.

Abstract: A computation of the processing complexity of an air-traffic-control situation is provided. In particular, the processing complexity of an air-traffic-control situation is computed using a supervised learning engine, trained using the result of analytical functions for computing the processing complexity of air-traffic-control situations.

Abstract: A method for decoding a coded data stream representing a video having a first view and a second view different from the first view, in which a reference image of the second view is previously reconstructed. For a current block of a current image of the first view, a motion information item associated with the current block representative of a displacement of the current block in the previously reconstructed reference image, is obtained. A prediction block is obtained based on the previously reconstructed reference image of the second view and of the obtained motion information item. The current block is reconstructed based on the prediction block, a prediction residual information item decoded based on the coded data stream and a difference information item calculated between a first block associated with the first view and a second block associated with the second view and decoded based on the coded data stream.

Abstract: The invention relates to an air traffic management electronic system, including the steps of: reception by said system of input data representative of the state of air traffic; establishment by said system of information relative to the air traffic as a function of said input data and delivery of said information to an electronic test device of the system; determination by said electronic test device, as a function of the delivered information, of air traffic control instructions and providing said system with said instructions; reception and processing of said instructions by said system; according, to which said electronic device includes an algorithmic model for automatically determining instructions as a function of information relative to the air traffic, said model having been obtained during a learning phase, carried out by computer, of a deep learning neural network, as a function of a set of instructions previously provided by at least one air traffic controller to the system and information rela

Abstract: A method for decoding a coded data stream representing a video having a first view and a second view different from the first view, in which a reference image of the second view is previously reconstructed. For a current block of a current image of the first view, a motion information item associated with the current block representative of a displacement of the current block in the previously reconstructed reference image, is obtained. A prediction block is obtained based on the previously reconstructed reference image of the second view and of the obtained motion information item. The current block is reconstructed based on the prediction block, a prediction residual information item decoded based on the coded data stream and a difference information item calculated between a first block associated with the first view and a second block associated with the second view and decoded based on the coded data stream.

Abstract: A method is provided for coding a current image. The method includes determining, in a first image, different from the current image, a group of k? pixels corresponding to a current group of k pixels (k??k) to be coded of the current image; calculating a motion vector between each of the k? pixels of the first image and a corresponding pixel of a second image different from the current image, on completion of which a field of k? motion vectors is obtained; and predicting the pixels or of the motion of the current group of k pixels of the current image on the basis of the field of k? motion vectors which is obtained.

Abstract: A method is provided for coding a current image. The method includes determining, in a first image, different from the current image, a group of k? pixels corresponding to a current group of k pixels (k??k) to be coded of the current image; calculating a motion vector between each of the k? pixels of the first image and a corresponding pixel of a second image different from the current image, on completion of which a field of k? motion vectors is obtained; and predicting the pixels or of the motion of the current group of k pixels of the current image on the basis of the field of k? motion vectors which is obtained.

Abstract: The invention relates to an encoding method for the compression of a video sequence by means of a tridimensional wavelet transform. This method is based on a hierarchical subband encoding process leading to transform coefficients constituting a hierarchical pyramid. A spatio-temporal orientation tree, in which the roots are formed with the pixels of the approximation subband and the offspring of each of these pixels is formed with the pixels of the higher subbands, defines the spatio-temporal relationship inside said pyramid. According to the invention, the initial subband structure of the wavelet transform is preserved, in the encoding process, by scanning the subbands one after the other in an order that respects the parent-offspring dependencies formed in the tree.

Abstract: The invention relates to scalable video encoders, and, more precisely, to an encoder comprising a base layer and at least an enhancement layer circuit, said circuits being capable of generating enhancement layer video data associated with compressed base layer video data and suitable for transmission to a video decoder. In said encoder, the implemented encoding method, based on a hierarchical triangular mesh representation to which a matching pursuit error coding step is specifically adapted, comprises a base layer encoding step and enhancement layer encoding steps. The invention also relates to a corresponding decoding method.

Abstract: The invention relates to a method for encoding a sequence of frames by means of a three-dimensional (3D) subband decomposition involving a filtering step applied to the frames considered as a 3D volume. The decomposition is applied to successive groups of frames after the implementation, on the frames of each group, of motion estimation and compensation operations in the low frequency temporal subbands at each level of the temporal decomposition, the compensation operation leading, among the filtered pixels, to double-connected pixels corresponding in the current frame to regions of the reference frame becoming uncovered during motion. According to the invention, the identification step of double-connected pixels is followed by a decision step based on a minimization criterion and provided for choosing in the current frame, for the temporal filtering of a double-connected pixel of the reference frame, the pixel that leads to a minimum energy of the detail subband.

Abstract: The invention relates to an encoding method for the compression of a video sequence. Said method, using a three-dimensional wavelet transform, is based on a hierarchical subband coding process in which the subbands to be encoded are scanned in an order that preserves the initial subband structure of the 3D wavelet transform. According to the invention, a temporal (resp. spatial) scalability is obtained by performing a motion estimation at each temporal resolution level (resp. at the highest spatial resolution level), and only the part of the estimated motion vectors necessary to reconstruct any given temporal (resp. spatial) resolution level is then encoded and put in the bitstream together with the bits encoding the wavelet coefficients at this given temporal (resp. spatial) level, said insertion in the bitstream being done before encoding texture coefficients at the same temporal (resp. spatial) level.

Abstract: The invention relates to an encoding method for the compression of a video sequence which is organized in groups of frames decomposed by means of a wavelet transform. The method is based on the hierarchical subband encoding process SPIHT that transforms the original set of picture elements (pixels) into coefficients ordered by means of three ordered lists called list of insignificant sets (LIS), list of insignificant pixels (LIP) and list of significant pixels (LSP).

Abstract: The invention relates to a video coding method based on a subband coding scheme applied to a sequence of two-dimensional frames. Said method comprises a subband decomposition step of a current frame (F2), a motion prediction step, carried out with respect to a previous or reference frame (F1), and a coding step. According to the invention, the motion prediction step is based on a redundant decomposition of the reference frame, according to the following procedure: in the approximation subband, the motion is estimated by means of a full search operation applied to each pixel of the current frame, and for the other subbands, the motion is estimated by means of a pel-recursive motion estimation algorithm using for the prediction the reference redundant subband reconstructed from the subsampled subbands. Said pel-recursive motion estimation algorithm itself comprises an initialization sub-step, a determination and updating sub-step, and a decision sub-step.

Abstract: The invention relates to a method of coding motion information associated to an image sequence, comprising the steps of subdividing each image into blocks and applying to each block a block-matching algorithm for defining a shifted block as the prediction of the current block, the motion vector between said shifted and current blocks being the predicted vector associated to said current block and all the motion vectors similarly predicted for a whole current image constituting a motion vector field associated to said current image. For each current image, the motion information constituted by said associated motion vector field is finally coded. According to the invention, the motion vector C to be coded is approximated by a spatio-temporal predictor P defined by a relation of the type: P=&agr;·S+&bgr;·T, where S and T are spatial and temporal predictors respectively, and (&agr;, &bgr;) are weighting coefficients respectively associated to said spatial and temporal predictors.

Abstract: The invention relates to a method for encoding a video sequence subdivided into groups of frames. This method comprises an on-line procedure in which a three-dimensional wavelet decomposition is performed involving a biorthogonal filter bank in a lifting scheme using optimal weighting constants. These constants are determined thanks to an additional off-line procedure in which a similar decomposition is performed but without any weighting constants.

Abstract: The invention relates, in the field of subband decomposition, to the design of filter banks adapted to the input signal statistics. In most cases, two channel filter banks are iteratively applied over several levels of decomposition, the signals in the resulting subbands representing decimated and filtered versions of the input signal. According to the invention, it is proposed a perfect reconstruction critically decimated polyphase filter bank with a ladder structure, which adapts to the nonstationarities in the input signal.