Abstract: A method for obtaining, by a first node, information relating to a congestion on a path allowing the routing of packets from said first node destined for a second node in a packet communications network, said congestion potentially degrading said routing.

Abstract: A multi-stream transmission method and device are provided for transmitting N data streams allocated to K different users. The method is implemented by a transmitter for a multi-user MIMO system having NT transmit antennas and ? k = 1 K ? ? N R k receive antennas associated with K receivers respectively associated with the K users. The method includes: performing a succession of two different iterative algorithms for calculating K precoding matrices of a linear precoder and K decoding matrices of a receiver, the receiver being of the normalized MF type with a Frobenius norm for the first algorithm, and the second iterative algorithm being initialized by a value output by the first iterative algorithm; and before each calculation of precoding matrices, calculating weights for weighting all of the streams.

Abstract: The invention relates to a method for determining transfer functions of the HRTF type for an individual, that includes: measuring, for a first number of directions, the transfer functions of the HRTF type specific to the individual; matching the directivity functions associated with the measured functions of the HRTF type, with reference directivity functions associated with reference transfer functions of the HRTF type, the reference functions of the HRTF type being determined for a second number of directions higher that the first number of directions and reconstructing the measured directivity functions from the reference directivity functions.

Abstract: A method is provided for communication between at least one source entity and one destination entity, in a cooperative network that includes a plurality of entities. The method includes a step of determining, for a given entity of the network, a temporal variation of an impulse response of a transmission channel established between the given entity and another entity. The method further includes: a step of determining a temporal variation of an impulse response of at least one global transmission channel intended to be established between the source entity and the destination entity and passing through at least one relay entity, on the basis of the temporal variations of the impulse responses of the transmission channels; and a step of selecting a global transmission channel from among the set of global transmission channels determined.

Abstract: A method of managing the sending of multimedia contents to a mobile terminal (2) equipped with a security module (3), the multimedia contents being sent in encrypted form from a broadcast server (1) and via a communications network (4). The method comprises the following steps: a) sending to the mobile terminal (2) rights-of-use data for a multimedia content, b) storing said rights-of-use data in the security module (3) of the mobile terminal (2), c) generating a series of encryption/decryption keys, the series of decryption keys being generated from rights-of-use data stored in the security module (3), d) sending the multimedia content to the mobile terminal (2), the content being encrypted with successive keys from the series of encryption keys that has been generated, and e) the mobile terminal receiving the multimedia content and decrypting the multimedia content using the decryption keys from the series of decryption keys generated in the security module of the mobile terminal.

Abstract: The invention relates to a method for sequencing spectral components of elements to be encoded (A1, . . . , AQ) originating from an audio scene comprising N signals (Sii=1 to N), in which N>1, an element to be encoded comprising spectral components associated with respective spectral bands, characterised in that it comprises the following steps: calculation of the respective influence of at least some spectral components which can be calculated as a function of the spectral parameters originating from at least some of the N signals on the mask-to-noise ratios determined over the spectral bands as a function of the encoding of said spectral components; and allocation of an order of priority to at least one spectral component as a function of the influence calculated for said spectral component compared to the other influences calculated.

Abstract: The invention relates to a method of coupling a computer program and/or data to a reference system, implementation of the computer program and/or access to the data being carried out by executing software, a group of parameters being associated with the reference system. The method comprises the protection of a value V0 associated with the reference system and necessary for the execution of said software, in alliance with at least one parameter of said group of parameters. The protection of the value V0 comprises the storage of at least one data pair comprising a function g_i of at least one parameter of said group of parameters and a function h_i of the value V0.

Abstract: A method is provided decoding a digital image signal in a decoding terminal that uses a variable-complexity decoding, enabling, for at least one step in the decoding, selection of at least one decoding tool from at least two available decoding tools. The method includes the following steps: identifying from the images control images and intermediate images; applying to each of the control images, for at least one step of the decoding, at least one predetermined decoding tool imposed by the signal; applying to at least one of the intermediate images, for at least one step of the decoding, at least one decoding tool selected by the decoding terminal and not imposed by the signal.

Abstract: An enrichment of multimedia content, management of multimedia content and setting up of a communication according to enriched multimedia content. A multimedia content enrichment method comprising an association of at least one identifier of a first user with multimedia content during management of said content by a communication terminal of said first user, said association allowing a second user having access to said multimedia content to request setting up of a communication between a communication terminal of said second user and a communication terminal of said first user by using one of said at least one identifier(s) of said first user.

Abstract: A method and apparatus are provided for indicating drag and drop targets for a first object among a plurality of second objects in a graphical user interface (GUI). The method includes rendering with a first rendering mode a first group of second objects within the GUI onto which a selected first object is likely to be dropped, rendering with a second rendering mode distinct from the first rendering mode a second group of second objects, the second group consisting of the remaining second objects, receiving a drag input on the first object, and updating the groups based at least upon an updated position of the first object derived from the received drag input.

Abstract: The method of selecting a wireless access telecommunication network in a global link between a first terminal (18) and a second terminal (12) comprises the steps of furnishing context information related to a set of at least one terminal (12, 18) called context taken from the first and second terminals, and in determining the network selected from context information from the set of context terminals (12, 18) by following a set of predetermined rules. The context information of at least one reference terminal taken in the set of context terminals includes information related to a local environment of the at least one reference terminal (12) and the determination of the selected network depends on information related to the local environment of the at least one reference terminal (12).

Abstract: Embodiments are concerned with method and a system for event processing in a communications network, and are suited to coordinating the provision of services in response to service initiation triggers. Embodiments are particularly applicable for use in controlling operation of service nodes, each of which is arranged to provide a particular service in a mobile network, or a fixed network or a combination of the two.

Abstract: An interleaving method (2) and an interleaver (9) for frequency interleaving data symbols. The data symbols are for allocation to carriers in a set of NFFT carriers of a module for multiplexing and modulation by orthogonal functions in a multicarrier transmitter device (3). A block of Npm successive data symbols is interleaved in application of an interleaving law that varies over time for a given transmission mode of the transmitter device, where Npm is less than or equal to NFFT.

Abstract: The invention relates to a method for ordering spectral parameters of ambisonic components to be encoded (A1, . . . , AQ) originating from an audio scene comprising N signals (Sii=1 to N), in which N>1, comprising the following steps: calculation of the respective influence of at least some spectral parameters, taken from a set of spectral parameters to be ordered, on an angle vector defined as a function of energy and velocity vectors associated with Gerzon's criteria and calculated as a function of a reverse ambisonic transformation in relation to said quantified ambisonic components; and allocation of a precedence order to at least one spectral parameter as a function of the influence calculated for said spectral parameter compared to the other calculated influences.

Abstract: A method is provided for analyzing a piece of multimedia content including a time series of elementary entities, in order to check whether or not the piece of multimedia content includes at least one piece of reference content referenced in a content base. The method includes, for at least one elementary entity of the multimedia content and selected according to a predetermined selection rule, or current elementary entity: allocating a plausibility probability to each elementary entity of a set of current candidate elementary entities; allocating a transition probability between the current candidate elementary entity or entities and at least one previous candidate elementary entity; allocating an identification probability of at least one scenario including a time series of candidate elementary entities; deciding the recognition of one of the reference content and/or carrying on the analysis using a subsequent elementary entity of the piece of multimedia content.

Abstract: Voice and/or image data packets are transferred by a packet handler between user stations in a GSM-type mobile communications system using a General Packet Radio Service (GPRS) data link. Control data for controlling a call is stored in a data store accessible by the packet handler. The control data identifies call participants and the identity of a participant who has currently seized the call. A mobile station capable of video conferencing is operable in a half-duplex video conferencing mode, in which intermittent transmission of video data is controlled by depression of a transmit button.

Abstract: The invention relates to a secure communication between an electronic label (A) and a reader (B), in particular for the authentication of the label by the reader, in which: the reader (31) transmits at least one datum (Ch) to the label, the label calculates a combination comprising at least the datum from the reader (Ch)) and a secret (Si) specific to the label, and the label communicates (32) the result (C(Si, Ch)) of the combination to the reader (B) for verification purposes. The aforementioned combination (C(Si, Ch)) is preferably calculated using a current secret value (Si) delivered by a pseudo-random number generator (33). The reader (B) is also provided with a homologous pseudo-random generator.

Abstract: A method of authenticating an entity by a verification entity, said entities sharing a pair of secret keys X and Y which are n×m (n, m>i) binary matrices. The method may be applied to cryptographic protocols for authenticating electronic chips at a very low cost.

Abstract: A method is provided for dynamically controlling the focus of a signal pre-equalized by time reversal of an estimated propagation channel between a source antenna of a source communicating entity and a destination antenna of a destination communicating entity at a current instant, said method comprising steps for evaluation by the destination communicating entity of a relative focus quality of the pre-equalized signal sent by the source antenna and received by the destination antenna, compared to a quality at a focal point, and if the evaluated relative focus quality does not satisfy a predetermined criterion, for request, by the destination communicating entity, to modify the focus addressed to the source communicating entity for a subsequent instant.

Abstract: A method is provided for propagating at least one route for at least one digital stream between a first location server of a first IP telephony domain and a second location server of a second IP telephony domain, the first location server belonging to an autonomous system, and the route for transferring the at least one digital stream. The method includes a stage of propagating at least one identification relating to the autonomous system of the first location server towards the second server.