Mobile communication terminal equipped with speaker phone function and method for removing feedback effect when speaker phone is used
AssigneeLG Electronics Inc.
InventorSeung Park
Life of this patent
Estimating the term…
Abstract
A mobile communication terminal equipped with speaker phone functionality and a method for removing feedback when the speaker phone is in use are disclosed. The mobile communication terminal includes: a first voice input path serving as a default voice input path; a second voice input path serving as an additional voice input path; and a controller for determining whether a speaker phone is in use, wherein the controller selects one of the first and second voice input paths according to whether the speaker phone is in use.
Claims23
A mobile communication terminal comprising:
- a first voice input path serving as a default voice input path;
- a second voice input path serving as an additional voice input path;
- and
- a controller for determining whether a speaker phone feature of the terminal is in use, the controller selecting one of the first and second voice input paths according to the determination of whether the speaker phone is in use.
A mobile communication terminal comprising:
- a non-directional microphone serving as a default voice input device for converting a user voice signal into an electric signal during use of the terminal;
- a unidirectional microphone for preventing the generation of feedback with respect to the user voice signal;
- and
- a controller for determining whether a speaker phone feature of the terminal is in use during use of the terminal, the controller selecting the unidirectional microphone as a voice input device when the speaker phone is in use.
A method for removing feedback during use of a mobile communication terminal having speaker phone functionality, comprising:
- a) upon receiving a power-supply signal, selecting a non-directional microphone as a default voice input device;
- b) determining whether a speaker phone is in use;
- and
- c) if the speaker phone is in use, switching from the non-directional microphone to a unidirectional microphone as the voice input device.
A method for removing feedback during use of a mobile communication terminal having a speaker phone, comprising:
- a) determining whether a speaker phone is in use;
- b) generating a control signal for switching a voice input path according to whether the speaker phone is in use;
- and
- c) performing an echo-canceling process capable of reducing a gain of a specific frequency band of a voice signal transmitted via the voice input path.
Dependencies are inferred from the claim text.