Side-tone control within a telecommunication instrument
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAlberto Diego Jimenez Feltström, Mats Ormin, Ulf Axel Lindgren, Joakim Persson
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Abstract
A side-tone control unit for a telecommunication instrument is configured to include a side-tone amplifier having a transfer function selectively controlled in accordance with a set of amplifier parameters, and a side-tone controller, coupled to the side-tone amplifier, for selectively applying the set of amplifier parameters to the side-tone amplifier based on the detected energy of an uplink signal and the detected energy of a downlink signal. The side tone controller can select a particular set of amplifier parameters by indexing a table in accordance with quantized values of the detected uplink signal energy and the detected downlink signal energy.
Claims14
A method for providing side-tone control for a telecommunication instrument, comprising the steps of:
- measuring an energy of an uplink signal and an energy of a downlink signal;
- selecting at least one amplifier parameter for controlling a transfer function of a side-tone amplifier based on said energy of said uplink signal and said energy of said downlink signal;
- applying said amplifier parameters to said side-tone amplifier;
- and
- adding an output of said side-tone amplifier to said downlink signal to produce an output signal.
A side-tone control unit, comprising:
- a side-tone amplifier including a transfer function selectively controlled in accordance with at least one amplifier parameter;
- a side-tone controller coupled to said side-tone amplifier, for selectively applying said at least one amplifier parameter to said side-tone amplifier based on a detected energy of an uplink signal and a detected energy of a downlink signal;
- and
- a summer for adding an output of said side-tone amplifier to said downlink signal to produce an output signal.
Dependencies are inferred from the claim text.