KR970068275A - Wireless transmission system of video and audio signals using infrared transmitter / receiver - Google Patents

Abstract

The present invention relates to a video and audio signal wireless transmission system using an infrared transmitter / receiver, and more particularly, to a system for transmitting a video / audio signal, which comprises a modulator and an infrared transmitter in a device for transmitting a video / audio signal, It is not necessary to use a connection line or a cable, and it is possible to transmit a signal at a distance greater than that of the conventional method, It is possible to connect them at the same time.

Description

Wireless transmission system of video and audio signals using infrared transmitter / receiver

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a configuration block diagram of a wireless transmission system according to an embodiment of the present invention; FIG.

Claims (8)

A first system for transmitting a video signal and a voice signal; A video signal amplitude modulator for receiving a video signal transmitted from the first system, amplifying the amplified video signal, generating an amplitude-modulated video signal, and outputting the modulated video signal; A voice signal frequency modulator for receiving a voice signal transmitted from the first system, amplifying the voice signal and frequency modulating the voice signal to generate and output a modulated voice signal; A buffer amplifier for receiving the video signal and the audio signal modulated by the video signal amplitude modulating unit and the audio signal frequency modulating unit and outputting the same without loss; A mixer for mixing and outputting the audio signal and the video signal provided by the buffering amplifying unit; And an infrared transmitting unit for converting the light emitted from the mixer into a light for interrupting the signal so that the light emitting device provided therein is switched according to a signal output from the mixer and propagating the light to the space. The system according to claim 1, wherein the first system generates a video signal (VIDEO) and a left and right audio signal (AUDIO R / L) such as a camcorder, a game machine, a multivision, a laser disc player, a compact disc player or a video tape recorder A wireless transmission system for video and audio signals using an infrared transmitter. The apparatus of claim 1 or 2, wherein the image signal amplification unit comprises: an amplifier for receiving and amplifying a video signal of the first system; An oscillator for generating and outputting a clock signal having a predetermined frequency; And an amplitude modulator for amplitude modulating an output signal of the amplifier according to a clock signal output from the oscillator and outputting the modulated signal to the buffer amplifying unit. The apparatus of claim 1 or 2, wherein the voice signal frequency modulating unit comprises: an amplifier for inputting and amplifying a voice signal of the first system; An oscillator for generating and outputting a clock signal having a predetermined frequency; And a frequency modulator for frequency modulating an output signal of the amplifier according to a clock signal output from the oscillator and outputting the modulated signal to the buffer amplifier. An infrared receiver for converting the light intermittently transmitted by the light receiving element provided therein and converting the electrical signal into an electric signal; An image signal detection and demodulation unit for separating only an image signal by filtering from a signal output from the infrared receiver and generating and outputting an original image signal by detecting and amplitude-demodulating the separated image signal; A voice signal detection and demodulation unit which separates only a voice signal by filtering from a signal output from the infrared receiver and detects and demodulates the separated voice signal to generate and output an original voice signal; And a second system for receiving the video signal and the audio signal output from the video signal detection and demodulation unit, the audio signal detection and demodulation unit, and performing a predetermined prescribed function using the video signal and the audio signal, Voice signal wireless transmission system. The system of claim 5, wherein the second system is a device for generating a display screen and performing audio reproduction using a video signal and a voice signal, such as a television or a monitor. The apparatus of claim 5 or 6, wherein the image signal detection and demodulation unit comprises: a first filter that separates only a frequency band in which a video signal exists from a signal output from the infrared receiver; And a detection and amplitude demodulator for detecting the signal separated by the first filter and generating an original video signal by amplitude and demodulation and outputting the generated video signal to the second system, Wireless transmission system. The apparatus of claim 5 or 6, wherein the speech signal detection and demodulation unit comprises: a second filter for separating only a frequency band in which a speech signal exists from a signal output from the infrared receiver; And a detection and frequency demodulator for detecting a signal separated by the second filter and generating a voice signal before modulation by frequency-demodulating the voice signal and outputting the voice signal to the second system, Signal wireless transmission system. ※ Note: It is disclosed by the contents of the first application.