KR19990005797A - Signal transmission device of the camcorder - Google Patents

Abstract

The present invention relates to a camcorder, which processes video and audio signals recorded on a tape of a camcorder so as to be transmitted at a radio frequency, and transmits them to a television, so that a signal is transmitted even if a cable connecting the camcorder and the television is not necessary. It is an object of the present invention to provide a signal transmission device of a camcorder which can be used.

The purpose of this is to receive a video and audio signal recorded on the tape signal processing unit for processing a signal of the form that can restore and display the video and audio; A modulator for converting the video and audio signals output from the signal processor into signals suitable for wireless transmission; A carrier generator for generating a carrier wave for wirelessly transmitting the video and audio signals converted by the modulator; A synthesizer for synthesizing the video and audio signals converted by the modulator on the carrier output from the carrier generator; It is achieved by being composed of a transmitter which amplifies the signal synthesized by the synthesizer according to the propagation distance to an appropriate signal strength and transmits the signal to a television.

Description

Signal transmission device of the camcorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camcorder, and more particularly, to a signal transmission apparatus of a camcorder for enabling wireless transmission of contents recorded and recorded by a camcorder to a television.

In general, a camcorder (camcoder), which is widely used in homes, records video and audio signals photographed by a user on a tape inserted into the camcorder's own deck.

Video and audio signals recorded on the tape can be displayed through its own viewfinder and speakers, and can also be displayed through a display device such as a television.

When the image and audio signals recorded on the camcorder are displayed on a television, as shown in FIG. 1, the signal processor 110 applies the image and audio signals recorded on the tape of the deck unit 100 mounted on the camcorder. The color signal R, G, and B, the luminance signal Y, and the voice are recovered and processed into a signal in a form that can be displayed, and then output to the output unit 120.

The output unit 120 converts the reconstructed video and audio signals applied from the signal processing unit 110 into a signal size sufficient for transmission to a television via a cable, and applies them to the output terminal 130.

The audio and video jacks (A / V) of the output terminal 130 are connected to the audio and video jacks (A / V) of the television input terminal 140 by a cable. As the signal is transmitted to the television side, an image signal is displayed on the screen, and an audio signal is displayed through the speaker.

In such a case, however, the camcorder's signal must be connected between the A / V output terminal of the camcorder and the A / V input terminal of the television to display the signal of the camcorder. In the short case, there was a problem that the contents of the camcorder can not be transmitted over a long distance.

Accordingly, an object of the present invention is to provide a signal transmission apparatus of a camcorder for processing a video and audio signal recorded on a tape of a camcorder so as to be transmitted at a radio frequency and transmitting the result to a television. .

1 is a diagram showing a signal transmission state between a typical camcorder and a television.

2 is a diagram showing a signal transmission device between a camcorder and a television according to the present invention;

Explanation of symbols for the main parts of the drawings

200: deck portion 210: signal processing portion

220: modulator 230: synthesizer

240: carrier generation unit 250: transmitter

260: receiver 270: tuner

280: demodulator

In order to achieve the above object, a signal transmission apparatus of a camcorder according to the present invention is a signal of a form capable of restoring and displaying an image and audio by receiving an image and audio signal recorded on a tape as shown in FIG. 2. A signal processor 210 for processing; A modulator 220 for converting the video and audio signals output from the signal processor 210 into signals suitable for wireless transmission; A carrier generator 240 generating a carrier wave for wirelessly transmitting the video and audio signals converted by the modulator 220; A synthesizer 230 for synthesizing the video and audio signals converted by the modulator 220 on the carrier output from the carrier generator 240; And a transmitter 250 for amplifying the signal synthesized by the synthesizer 230 according to the propagation distance with an appropriate signal strength and transmitting the signal to the television.

The signal transmission apparatus of the camcorder of the present invention configured as described above will be described in detail as follows.

First, when the video and audio photographed for the user are recorded on the tape, the signal processing unit 210 receives the pre-recorded video signal and audio signal from the tape of the deck unit 200 and receives the color signals R, G, and B. The luminance signal Y and the voice may be restored and processed into a signal that can be displayed.

The video signal and the audio signal processed by the signal processor 210 are applied to the modulator 220 and modulated into a signal suitable for wireless transmission.

Meanwhile, the carrier generator 240 generates a carrier wave for wirelessly transmitting the video and audio signals modulated by the modulator 220 to the television side. Ultra High Frequency) should be carrier.

Therefore, the synthesizer 230 synthesizes the image and audio signals output from the modulator 220 on the microwaves generated by the carrier generator 240.

The signal synthesized by the combiner 230 is applied to the transmitter 250 and amplified by the strength of a signal that can be transmitted to the television, and then transmitted to the television through an antenna or the like.

In this case, the amplification degree of the signal should be set in advance, and in the case of normal home use, a size enough to transmit a distance of about 20 meters will be sufficient.

The signal transmitted from the camcorder is received by the receiver 260 and applied to the tuner 270. At this time, the user selects a frequency band to be tuned through the tuner.

In other words, tuning is performed to extract only the frequency of the carrier band transmitted from the camcorder.

The frequency transmitted from the camcorder which has been tuned in this way is applied to the demodulator 280, and is applied to the display processing system so that it can be demodulated to the original signal before being modulated by the modulator 220 of the camcorder and displayed on the screen of the television.

As described in detail above, the signal transmission apparatus of the camcorder according to the present invention connects the camcorder and the television by processing the video and audio signals recorded on the tape of the camcorder so as to be transmitted to the television by transmitting them at a radio frequency. Even if a cable is not necessary, the signal is transmitted.

Claims (1)

A signal processor which receives a video and audio signal recorded on a tape and processes the video and audio signals into a signal that can be restored and displayed; A modulator for converting the video and audio signals output from the signal processor into signals suitable for wireless transmission; A carrier generator for generating a carrier wave for wirelessly transmitting the video and audio signals converted by the modulator; A synthesizer for synthesizing the video and audio signals converted by the modulator on the carrier output from the carrier generator; And a transmitting unit for amplifying the signal synthesized by the combining unit according to the propagation distance to an appropriate signal strength and transmitting the signal to the television.