Abstract: Systems and methods for enabling an audio conference are provided. In one aspect, a system includes a transmitting device which receives audio signals representing sounds captured by at least two microphones from participants situated at a first location. A time-of-arrival delay between at least two of the audio signals is calculated and a beam-formed monaural audio signal and corresponding spatial data are generated and transmitted to remote participants situated at a second location. A receiving device processes the beam-formed monaural audio signal based on the spatial data to render and output spatial audio via speakers to the remote participants at the second location. In various aspects, the spatial data may include an angular value or a participant identifier that are determined based on the time-of-arrival delay. The spatial data may also indicate a total number of conference participants that are detected at the first location.

Abstract: Systems and methods for enabling an audio conference are provided. In one aspect, a system includes a transmitting device which receives audio signals representing sounds captured by at least two microphones from participants situated at a first location. A time-of-arrival delay between at least two of the audio signals is calculated and a beam-formed monaural audio signal and corresponding spatial data are generated and transmitted to remote participants situated at a second location. A receiving device processes the beam-formed monaural audio signal based on the spatial data to render and output spatial audio via speakers to the remote participants at the second location. In various aspects, the spatial data may include an angular value or a participant identifier that are determined based on the time-of-arrival delay. The spatial data may also indicate a total number of conference participants that are detected at the first location.

Abstract: The invention concerns a method of controlling an adaptation of a filter, and a controller and a computer program product to execute this method. The filter is an adaptive finite impulse response (=FIR) filter for modelling an echo path impulse response for echo cancellation in a telecommunications connection between a first terminal providing a near-end signal at a first end of the telecommunications connection and a second terminal providing a far-end signal at another end of the telecommunications connection. In a multi-windowing scheme, a plurality of filter segments and segments of the far-end signal is determined in the time domain. An energy level associated to an individual segment of the far-end signal is compared with an energy level associated to a sample of the near-end signal. In dependence on the result of the comparison of the energy levels, the adaptation of an individual filter segment associated to the individual segment of the far-end signal is enabled or inhibited.

Abstract: A device is dedicated to managing multimedia communications via an asynchronous network (IPN) and a telephone network (TDMN) between firstly a first audio communications terminal (T1) with a first video communications terminal (PC1), and secondly a second audio communications terminal (T2) with a second video communications terminal (PC2). The device comprises management means (MG) serving to order link means (ML) to set up a telephone link (L1) between the audio communications terminals (T1, T2) via the traditional telephone network (TDMN) on receiving a request to set up a multimedia call between the first and second video communications terminals (PC1, PC2) via the asynchronous network (IPN).

Abstract: A relay node is provided for coupling telephone, facsimile or data terminals to a digital packet telecommunications network. The relay node includes a signal discriminator for determining the type of signal coming from a terminal coupled to the node, from amongst a plurality of signal types, and a plurality of software relay devices each adapted to process a respective type of signal and controlled by the discriminator in order to apply to each signal a form of relay processing corresponding to the signal type.

Abstract: The invention concerns a method of controlling an adaptation of a filter, and a controller and a computer program product to execute this method. The filter is an adaptive finite impulse response (=FIR) filter for modelling an echo path impulse response for echo cancellation in a telecommunications connection between a first terminal providing a near-end signal at a first end of the telecommunications connection and a second terminal providing a far-end signal at another end of the telecommunications connection. In a multi-windowing scheme, a plurality of filter segments and segments of the far-end signal is determined in the time domain. An energy level associated to an individual segment of the far-end signal is compared with an energy level associated to a sample of the near-end signal. In dependence on the result of the comparison of the energy levels, the adaptation of an individual filter segment associated to the individual segment of the far-end signal is enabled or inhibited.

Abstract: A device is dedicated to encrypting/decrypting data in a communication equipment able to exchange data with another data equipment of an equivalent type via at least one communication network entailing modulation/demodulation. This device comprises processing means adapted i) in the event of setting up a call between their called equipment and a calling equipment with a view to transmitting data to generate a first message to the calling equipment containing in a non-standard facilities field first data for determining a primary encryption key then to determine that primary encryption key as a function of the first data and ii) in the event of reception from the calling equipment of a second message containing (possibly in a field of the message) second data representative of its ability to encrypt data to be transmitted and then of encrypted data to decrypt the received encrypted data by means of the primary encryption key.

Abstract: A device is dedicated to managing multimedia communications via an asynchronous network (IPN) and a telephone network (TDMN) between firstly a first audio communications terminal (T1) with a first video communications terminal (PC1), and secondly a second audio communications terminal (T2) with a second video communications terminal (PC2). The device comprises management means (MG) serving to order link means (ML) to set up a telephone link (L1) between the audio communications terminals (T1, T2) via the traditional telephone network (TDMN) on receiving a request to set up a multimedia call between the first and second video communications terminals (PC1, PC2) via the asynchronous network (IPN).

Abstract: The present invention concerns a method and a device for determining the voice quality degradation of a signal. Method for determining the voice or speech quality degradation of a signal, without using any reference or initial signal, wherein it mainly consists in decomposing the signal to be analysed by means of a segmentation algorithm, then applying at least one metric to the resulting decomposed signal and finally evaluating the signal degradation.

Abstract: The relay node is for coupling telephone, facsimile or data terminals to a digital data packet telecommunications network.

Abstract: Each station is connected to the token ring network (5) through station and token ring interface units, the latter of which units has a switch (37) for connecting the station to the token ring (5) to transmit signals it receives in digital form either from the token ring or from the station via the associated station interface unit. The data signal received from a station clocked by an oscillator of that station is transcoded in the associated token ring interface unit before it is recoded in its original form under the control of an oscillator (12) common to the stations of the device which is slaved to the oscillator of one of the stations taken as a master station.

Abstract: Interface for transmit and receive mode access to the synchronous transmission medium of a distributed switching network. This interface for transmit and receive mode access to the synchronous transmission medium of a distributed switching system, the architecture of the network being based on a transmission medium time-shared between stations and each station comprising a device for determining the time positions corresponding to data to write to or to read from the medium, comprises in each station, for each transmission direction, a pair of memories one of which respectively accesses said medium in transmit mode and in receive mode synchronously with the presentation of the time positions to the medium while the other is respectively written or read under the control of the time position determining device, and vice versa.