Abstract: The invention relates to a method for scalar quantization-based coding of the samples of a digital audio signal (S), the samples being coded over a pre-determined number of bits in order to obtain a binary frame of quantization indices (IPCM), the coding being carried out according to an amplitude compression law, where a pre-determined number of least significant bits are not taken into account in the binary frame of quantization indices. The coding method comprises the steps for storing (27) at least a part of the least significant bits that are not taken into account in the quantization index binary frame and for determination (28) of an enhancement bit stream (IEXT) comprising at least one bit thus stored.

Abstract: A method including: detecting a first input on a first specific element of a user interface of an electronic device, the detection of the first input triggering a selecting mode; while in the selecting mode, when detecting a plurality of second inputs on second specific elements of the user interface, selecting the second specific elements, each second specific element corresponding to an electronic content to be displayed; storing the selected second specific elements; detecting a third input on a third specific element of the user interface, the detection of the third input terminating the selecting mode; after terminating the selecting mode, displaying at least an electronic content corresponding to a first stored second specific element; and detecting a fourth input on a fourth specific element of the user interface triggering the display of another electronic content corresponding to another stored second specific element.

Abstract: The invention relates to the processing of a digital signal originating from a decoder and a noise reduction post-processing step, including, in particular, limitation of distortion introduced by the post-processing step in order to deliver a corrected output signal (SOUT), assigning said corrected output signal (SOUT) with: a current amplitude having an intermediary value between a current amplitude value of the post-processed signal (SPOST) and a corresponding current amplitude value of the decoded signal (S?MIC), or the current amplitude of the post-processed signal (SPOST), according to the respective values of the current amplitude of the post-processed signal (SPOST) and by the corresponding current amplitude of the decoded signal (S?MIC).

Abstract: The invention relates to a method of tracking the position of the bust of a user on the basis of a video image stream, said bus comprising the user's torso and head, the method comprising the determination of the position of the torso on a first image, in which method a virtual reference frame is associated with the torso on said first image, and in which method, for a second image, a new position of the virtual reference frame is determined on said second image, and, a relative position of the head with respect to said new position of the virtual reference frame is measured by comparison with the position of the virtual reference frame on said first image, so as to determine independently the movements of the head and the torso.

Abstract: A method for determining a speech quality measure of an output speech signal with respect to an input speech signal, wherein the input signal passes through a signal path of a data transmission system resulting in the output signal, includes the steps of pre-processing the output signal; determining at least one of an interruption rate of the pre-processed output signal and a measure for an intensity of musical tones present in the pre-processed output signal; and determining the speech quality measure from at least one of the interruption rate and the measure for the intensity of the musical tones.

Abstract: A method is provided for decoding a signal that represents at least one image. The method implements at least one iteration of the following steps, for at least one block of the image to be decoded: determining at least one selection parameter from at least one characteristic associated with at least one reference pixel of a reference region of the image, the reference region including at least one previously encoded/decoded block and/or at least one pixel predicted in a preceding iteration; selecting at least one pixel to be predicted in the block to be decoded from the at least one selection parameter; and for at least one selected pixel to be predicted, referred to as an anchor pixel, predicting the anchor pixel from at least one reference pixel, thereby outputting a predicted pixel.

Abstract: A method of communication, on a radio channel, between at least two nodes is disclosed. This method is adapted for emitting on the channel in an alternating manner, comprising formulating, by one of the two nodes, termed the emitter, a signal comprising a preamble comprising a series of frames, followed by the data frame, at least one first frame of the preamble comprising a copy of the data frame and indicating a number of frames of the preamble separating this first frame from the data frame and emitting, by the emitter node, of the signal thus formulated on the radio channel.

Abstract: The method performed by a receiver entity in a hierarchical network, the entity having knowledge of the hierarchical levels of nodes of the network is disclosed. In one aspect, the method comprises, on reception of a request to store data as sent by a sender unit: a step of selecting at least one storage entity for storing the data, the selection step taking account at least of the hierarchical level of the storage entity in the network; and a step of sending information to the sender unit enabling it to obtain the identifier of the data storage entity.

Abstract: A method for processing data, in particular an image representative of an observation zone in which is situated an object arranged with respect to a reference plane.

Abstract: An error correction encoding device is provided that combines redundancy data with source data, said device including: at least three encoding stages and at least two permutation stages. Each encoding stage implements at least one set of three basic encoding modules, in which a first encoding stage receives said source data and a last encoding stage provides said redundancy data. Each encoding module implements a basic code and includes c inputs and c outputs, c being an integer. The permutation stages are inserted between two consecutive encoding stages and each permutation stage implements a c-cyclic permutation.

Abstract: Digital data blocks are encrypted, each data block that is to be encrypted being associated with a time reference. A value of an initialization vector Vi and an encryption key K are defined. Then, a counter C is obtained for each data block to be encoded, by combining the time reference and the value of the initialization vector. A series of binary encryption elements is obtained via an encryption function taking the encryption key K and counter C as input parameters. The data block is then encrypted by combining it with the series of binary encryption elements.

Abstract: A system and a method for cryptographic reduced-coupon reloading are provided, where a coupon includes a pseudo-random number ri=PRFK(i), where i is an index for labeling the coupon, PRF is a predetermined pseudo-random function and K is a regeneration key, and a “reduced-coupon” xi=ƒ(ri), where ƒ is a predetermined one-way function, where: a candidate device and a second device acquire a common value of a token T, the candidate device transmits a verification value vT to the second device, the second device verifies whether the verification value is equal to PRF?Q(T), where PRF? is a predetermined keyed pseudo-random function identical to, or derived from, the pseudo-random function PRF, where Q is an authentication key owned by the second device and known to the candidate device provided the candidate device is a legitimate reloading device, and if the verification is positive, one or several reduced-coupon(s) provided by the candidate device are stored in the second device.

Abstract: A method and apparatus are provided for controlling at least one application process comprising a plurality of application services, which are executed in an application environment in order to provide a service. One such method includes steps enabling a globally asynchronous implementation of the aforementioned application services without generating a timeout in relation to a client that requested the implementation of said application process.

Abstract: A method and apparatus are provided for creating a pilot channel in an opportunistic radio communication system whose frequency spectrum comprises a set of frequency bands and for which system the successive frames of a radio communication channel are divided into time intervals. The method includes the steps of: opportunistically selecting a free frequency band from the frequency spectrum, so as to support the pilot channel; sending a beacon signal over at least one time interval of the successive frames of the pilot channel and probing the free frequency band over at least one time interval distinct from the previous one.

Abstract: The invention relates to a passive optical network comprising an optical exchange linked by at least one optical fiber to at least one line termination device of said network, able to transmit a downlink optical signal phase-modulated in NRZ-DPSK format and to receive an uplink optical signal. According to the invention, said line termination device comprises means of converting the transmitted downlink optical signal phase-modulated in NRZ-DPSK format into an optical data signal amplitude-modulated in duobinary modulation format and means of generating an uplink optical signal phase-modulated in NRZ-DPSK format from the downlink optical signal phase-modulated in NRZ-DPSK format. The optical exchange is able to convert the uplink optical signal phase-modulated in NRZ-DPSK format into an optical data signal amplitude-modulated in duobinary modulation format.

Abstract: The invention relates to the coding/decoding of a signal into several sub-bands, in which at least a first and a second sub-bands which are adjacent are transform coded (601, 602). In particular, in order to apply a perceptual weighting, in the transformed domain, to at least the second sub-band, the method comprises:—determining at least one frequency masking threshold (606) to be applied on the second sub-band; and normalizing said masking threshold in order to provide a spectral continuity between the above-mentioned first and second sub-bands. An advantageous application of the invention involves a perceptual weighting of the high-frequency band in the TDAC transform coding of a hierarchical encoder according to standard G.729.1.

Abstract: A method is provided for operating a communication device offering a plurality of features by a plurality of virtual machines, which run on a virtualized representation of a plurality of hardware components. The method includes: obtaining a mapping between at least some features of the plurality of features and corresponding sets of virtual machines of the plurality of virtual machines and hardware components of the plurality of hardware components which are required to enable the features; and upon deciding to activate or deactivate at least one group of features of the plurality of features, switching on or off virtual machines of the plurality of virtual machines and hardware components of the plurality of hardware components depending on the mapping.

Abstract: An access point to a restricted-access cell of a cellular network detects at least one cell of the cellular network in the vicinity of the cell in which it is located. It sends a server of the cellular network an identifier (RAC1) of the restricted-access cell, an identifier of the cell(s) detected, and an identifier of at least one user (U1) authorized to access the restricted-access cell. On reception of this information, the server stores it in a database (26) and can therefore send a mobile terminal (10) of said user (U1) the identifier (RAC1) of the restricted-access cell it is authorized to access. This identifier can be sent if the server detects that the mobile terminal (10) is in the vicinity of the restricted-access cell and/or periodically and/or in the event of a change to the information stored in the database (26) of the server.

Abstract: A telecommunications system communicates data packets to and from a mobile terminal in accordance with a mobile internet protocol. The system includes a packet radio network having a first radio access interface and a gateway support node and includes a wireless access network having a second radio access interface and a home agent The mobile terminal is arranged to connect to one of the packet radio network or the wireless access network and, when connected, to detect which of the packet radio network and the wireless access network the mobile terminal has connected. Upon detection that the mobile terminal is attached to the packet radio network, the mobile terminal and the home agent are arranged so that data packets are transmitted to and from the mobile terminal via the gateway support node, and mobile internet protocol operations through the home agent are deactivated or suppressed.

Abstract: A method of broadcasting a data packet (D) in an ad hoc network comprising a plurality of groups of mobile nodes traveling along traffic lanes in a road network. The data packet (D) is broadcast within a group (G) during an intragroup broadcasting phase during which the data packet (D) propagates simultaneously in two opposing directions of movement (A1, A2), such that the packet (D) is received by peripheral nodes (B1, B2) of the group (G). During an intergroup broadcasting phase, a peripheral node (B) transmits the data packet (D) to another group.