KR20020063937A - Wireless television sound hearing system - Google Patents

Abstract

PURPOSE: A wireless television sound hearing system is provided to attach one sound transmitting unit on one television and to use a plurality of sound receiving units, so as to hear the television sound with an earphone. And the system is provided to hear the television sound wirelessly just by connecting the sound transmitting unit to a sound signal output terminal of a television, without replacing the existing television. CONSTITUTION: A sound transmitting unit(3) includes a sound signal input part connects with a sound signal output terminal(5) of a television for receiving sound signals, a modulator for transmitting inputted signals, an amplifier, and an FM(Frequency Modulation) high frequency transmitting part. A sound receiving unit(1) includes an FM high frequency receiving part for receiving the transmitted signals and demodulating and amplifying the signals for use through an earphone(2), a volume adjuster(7), and an earphone jack(6). The sound transmitting unit wirelessly transmits the sound signals output from the sound signal output terminal of the television. The sound receiving unit receives the wirelessly transmitted sound signals, and outputs the sound signals through the earphone connected to the earphone jack. The volume and on/off of the sound signals output through the earphone are adjusted by the adjuster attached on the sound receiving unit. And a plurality of sound receiving units are used for one sound transmitting unit attached on the television.

Description

Wireless TV Broadcast Listeners {Wireless Television Sound Hearing System}

Until now, in addition to viewing the screen visually, television has been audibly heard through speakers attached to the television. Depending on how loud the television is, the closer to the television, the louder it should be, and if you don't want it, you have to hear it. Complementing this is the use of headphones, which can be used only by one person and only in close range. Therefore, there is a difficulty in utilizing in a space shared by several people, such as a hospital room in a conventional manner.

The wireless television broadcasting listener according to the present invention solves this limited problem, and allows several people to listen to the contents of the broadcast wirelessly at the same time, thereby ensuring the individual's life in the common life such as a hospital room.

The wireless television broadcast receiver according to the present invention connects a voice signal output terminal of a television with a voice signal input unit, a voice transmitter comprising a modulator for transmitting an input signal, an amplifier, an FM high frequency transmitter, and the like. You can listen to the audio signal wirelessly with the earphone through the voice receiver which consists of FM radio receiver for demodulating and amplifying the received signal, demodulating and amplifying the volume, volume control unit for adjusting the volume, and earphone connection terminal. It was made.

According to the present invention, a single voice transmitter is attached to a single television so that a plurality of voice receivers can be used. The device allows you to hear sound through the earphones.

In addition, by replacing the existing television entirely, by simply connecting a small voice transmitter to the audio signal output terminal of the television, the audio signal can be heard wirelessly, minimizing the cost of purchasing a new device. It is economically feasible to guarantee and install individual life in the common life in the hospital room.

1 is a block diagram of a device according to the present invention.

2 is a block diagram showing a signal transmission method in a voice output device for realizing a device according to the present invention.

3 is a block diagram showing a method of receiving a voice receiver signal for realizing a device according to the present invention.

The above object is connected to the audio signal output terminal of the television in the present invention, a voice signal input unit that receives from the output terminal, a voice transmitting device consisting of a modulator for transmitting the input signal, amplifying unit, FM high-frequency transmitter, etc. It consists of an FM high-frequency receiver that receives demodulated signals, demodulates them, and amplifies them to connect earphones, a volume control unit for adjusting the volume, and a voice receiver including earphone connection terminals. Hereinafter, a wireless television broadcast listener will be described with reference to the accompanying drawings.

1 is a block diagram of a device according to the present invention. Hereinafter, a description will be given of the classification of the device according to the present invention with reference to the accompanying drawings.

The audio transmitter 3 wirelessly transmits the audio signal output from the audio signal output terminal 5 of the television. The voice receiver 1 receives the voice signal transmitted wirelessly from the voice transmitter and outputs the signal through the earphone 2 connected to the earphone jack 6. The volume and on / off of the voice signal output to the earphone 2 can be controlled by the controller 7 attached to the voice receiver, and a single voice transmitter 3 attached to the television can receive multiple voices. The device 1 can be used.

2 is a block diagram showing a signal transmission method in a voice transmission apparatus for realizing a device according to the present invention. Hereinafter, a signal transmission method of a voice transmission apparatus according to the present invention will be described with reference to the accompanying drawings. The crystal oscillator 11 generates a carrier wave for transmission. The buffer amplifier 12 is located next to the crystal oscillator to prevent the influence of load fluctuations on the oscillator and to oscillate the carrier constantly at all times regardless of the state of other parts of the apparatus. At this time, the coupling of the oscillator and the buffer amplifier is referred to as loose coupling. In the frequency multiplying unit 13, in a transmitter requiring a high frequency, the oscillation output is amplified, and at the same time, a C wave is made to produce a distorted waveform, and then the frequency is removed by subtracting the second or third high frequency appearing in the plate circuit. To multiply by two or three times. At this time, a resonant circuit for tuning the required high frequency is inserted into the plate circuit. The modulator 14 is a circuit for synthesizing and amplifying the signal of the audio signal output terminal 17 of the television at the high frequency from the frequency multiplier. The power amplifier 16 receives the output of the modulator, the frequency multiplier, and the carrier oscillator, amplifies the power to the normal transmission power, and then supplies the antenna to the antenna 15 to fire. In addition, the power amplifier is provided with a neutralization circuit so that the input frequency and the output frequency are the same.

3 is a block diagram showing a method of receiving a signal in a voice receiving apparatus for realizing a device according to the present invention. Hereinafter, a description will be given of a signal reception method of a device according to the present invention with reference to the accompanying drawings. The high frequency amplification unit 22 is a part for amplifying the high frequency introduced through the antenna 21 to fit the actual circuit, and since the performance of the high frequency amplifying unit greatly affects the entire receiver, the high frequency amplification unit 22 is used to increase the ratio of S / N. Use a low noise amplifier. The purpose of frequency conversion of the frequency conversion section 23 is to convert the reception frequency into an intermediate frequency in order to facilitate amplification and selection of the received signal. The conversion unit is composed of a mixed circuit (Mixer) and a local oscillation (Oscillation) circuit. The intermediate frequency amplifier 24 is a circuit for amplifying a signal converted into an intermediate frequency lower than the reception frequency by the frequency conversion circuit. Creating and amplifying intermediate frequencies can increase amplification, cause no oscillation, and improve selectivity. At this time, the electronic coupling amplifier circuit of two to three stages is used. The detector 25 is a part for detecting the original signal from the modulated wave. The low frequency amplifier 26 detects a signal from the detector and sends the signal to the amplifier so as to amplify the detected low frequency (original signal) so that the earphone 27 can listen to the audio signal.

The wireless television broadcast listener according to the present invention transmits a signal output from the audio signal output terminal of a television through a voice transmitter, and one or more people having earphones connected to the voice receiver and the receiver simultaneously broadcast wirelessly. The contents can be listened to, so that the individual's life can be guaranteed even in the common life of the hospital.

Claims (3)

By connecting to the television audio signal output terminal, an output audio transmission device consisting of a modulator, an amplifier unit, FM radio frequency transmission unit or the like for the terminal receiving the transmitted voice signal input, an input signal from, demodulates it after receiving the transmitted signal Wireless television broadcast listener consisting of an FM high-frequency receiver for amplifying and amplifying earphones, a volume controller for adjusting the volume, and a voice receiver consisting of a pair of earphones. It is possible to connect and use multiple voice receivers simply by installing one voice transmitter on the audio signal output terminal of the television so that only the person who wants to listen to the sound of the television can be heard in the earphones. How to. By simply installing one audio transmitter on the audio signal output terminal of the television, when a user changes the channel of the television, a listener using a plurality of audio receivers can change the channel of the receiver without changing the channel of the receiver. How to listen to television sound.