Patent ID: 9042564
Filing Date: 2015-05-26
Classification: G06F,G10L,H04M,H04R

Abstract:
1. A wireless communication device having speech recognition, speech translation, and hearing aid functions, the wireless communication device comprising: an ITE (In-The-Ear) type radio transceiver including a microphone that receives an external voice, an ITE (In-The-Ear) type radio signal processor that is attached to a person's ear, and that processes radio data received from the microphone, a receiver that converts electrical signals from the radio signal processor into sound pressure, a volume controller that controls the intensity of the sound pressure output from the radio signal processing unit, and a coil antenna for short-range wireless communications; and a portable radio repeater including a portable communication device that relays signals transmitted from the coil antenna of the ITE type radio transceiver, a coil antenna for short-range wireless communications with the ITE type radio transceiver, and a radio frequency (RF) antenna for two-way wireless communications with a portable radio repeater owned by another conversation partner, wherein the radio signal processor includes: an analog-to-digital (A/D) converter that converts an analog signal output from the microphone into a digital signal; a first buffer memory that temporarily stores the signals output from the A/D converter; a second buffer memory that temporarily stores the signals to be output; and a digital-to-analog (D/A) converter that converts a digital signal into an analog signal prior to being output to the receiver, and wherein the radio signal processor includes: a first digital amplifier (DG1) that digital power amplifies the digital signal output from the first buffer memory; a FM (Frequency Modulation) modulator that FM modulate the power amplified signal from the first digital amplifier (DG1); a first analog power amplifier (AG1) that minimizes noise included in the digital signal modulated in the FM modulator to thus wirelessly amplify the noise-minimized digital signal; an analog signal switching device (RF MUX) for switching the signal output from the first analog power amplifier; a coil antenna that propagates the signal output from the analog signal switching device; a controller that controls the switching operation of the switching device between a speech mode and a listening mode; a vector adder that vector sums the signal output from the first buffer memory and the signal fed back from the buffer memory; a digital feedback eliminator that prevent howling that occurs when the sound output from the receiver is fed back to the microphone; a second analog pre-amplifier (AG2) that minimizes communication noise from the RF signal switched by the analog signal switching device; a FM demodulator that demodulates the signal amplified by the second analog pre-amplifier; and a second digital amplifier (DG2) that amplifies the signal demodulated by the FM demodulator.