Siemens Aktiengesellschaft

Other

Hewlett-Packard Development Company, L.p.

Gigaset Communications Gmbh

Stefano Ambrosius Klinke

Roland Aubauer

Karl-Heinz Pflaum

Frank Lorenz

Erich Kamperschroer

Michael Hülskemper

Niels Kunstmann

Christoph Pörschmann

Christoph Poerschmann

Gerhard Bock

Ulf Niemeyer

The disclosure relates to a communication terminal having a bandwidth expansion device for expanding the bandwidth of a narrowband voice signal, on a low-frequency and/or high-frequency side, by synthesizing at least one frequency band on the basis of the narrowband voice signal. A qualitatively satisfactory bandwidth expansion is thus performed using a plurality of net bit rates. The bandwidth expansion device is further connected to a memory containing a lookup table comprising at least one parameter value for the bandwidth expansion, for at least two net bit rates of the narrowband voice signal. A method for expanding a bandwidth of a narrowband voice signal having at least two net bit rates in a communication terminal is also disclosed herein.

Communication terminal with a parameterised bandwidth expansion, and method for the bandwidth expansion thereof

A method and device are provided for suppressing periodic interference signals, including a unit which is used to provide a period length for the periodic interference signal, an interference detection unit for detecting a signal corresponding to the interference signal, and a subtraction unit for subtracting the signal corresponding to the interference signal. The interference detection unit carries out multiple superpositioning of the input signal and scales the multiple superpositioned input signal depending on the period length of the interference signal in order to detect the signal corresponding to the interference signal.

Method and device for the suppression of periodic interference signals

The aim of the invention is to control the bass reproduction of audio signals in electroacoustic transducers based on the psychoacoustic principle denoted by the term 'virtual pitch' or 'residual hearing (hearing of missing fundamental)', in such a way that the perception of the virtual bass reproduction of the audio signals is improved in relation to prior art. To this end, the reproduction of the low pitched frequencies or basses released in the electroacoustic transducer is controlled by the amplification of the harmonic waves already contained in the audio signals, in the form of a simulation, in such a way that the listener experiences or perceives an improved bass reproduction. The control or simulation can thus be carried out in both a digital manner, by means of a program module in a digital signal processor of an electronic appliance for outputting and/or reproducing audio signals using the electroacoustic transducer, and in an analog manner, by means of a hardware circuit between a digital analog transducer and a final amplifier of the electronic appliance for outputting and/or reproducing audio signals using the electroacoustic transducer.

Method and apparatus for controlling the reproduction in audio signals in electroacoustic converters

System and method for the registration of a mobile part (MT, OA, HA) in a base station (BS) in a telecommunication system designed for wireless communication between a mobile part (MT, OA, HA) and a base station (BS. The base station and the mobile part are initially placed in an access standby state. Subsequently, a verification procedure determines a message exchange (MA) between the mobile part and the base station if the base station supports a voice-controlled registration and if the mobile part is theoretically connected to the base station. If the theoretical connection is determined, a user channel connection suitable for the transmission of voice data is established between the mobile part and the base station. The mobile part is then either registered in the base station, or the registration attempt is rejected.

Method and telecommunication system involving wireless telecommunication between a mobile part and a base station for registering a mobile part

A computer apparatus is provided, which has a multipath acoustic output system and a multipath acoustic input system, which includes parts for enabling an adaptation of the filter of an acoustic echo canceller incorporated in the computer apparatus that is always precise regardless of the chronological delays of the components of the computer apparatus, wherein the chronological delays are variable for acoustic signals.

Computer apparatus having a multiway acoustic output and input system

Provided is a directional-microphone system, as well as a method for signal processing in such a directional-microphone system, wherein a particularly controllable second-order directional-microphone pattern is ensured while the number of figure-of-eight microphones required to generate such pattern is minimized.

Directional-microphone and method for signal processing in same

A mobile communications terminal is provided having a first loudspeaker for emitting sound signals in a normal mode of the communications terminal, a second loudspeaker for emitting sound signals in a hands-free mode of the communications terminal, an antenna and a signal processing device for processing signals which have been received by the antenna and for supplying processed signals to the first loudspeaker and to the second loudspeaker depending on whether the communications terminal is in the normal mode or in the hands-free mode, wherein better high-frequency reproduction in a hands-free mode is achieved in that, in the hands-free mode, the signal processing device is designed to supply processed signals at a frequency of more than 1 kHz to the first loudspeaker and the first loudspeaker is designed to reproduce sound signals at a frequency of more than 1 kHz.

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Kerpen, Germany

Stefano Ambrosius Klinke