KR19990015086U - Subsequent input priorities for external audio / video input - Google Patents

Abstract

The present invention relates to a subsequent input priority processing device for inputting an external audio / video. When an A / V signal is input through an A / V input terminal mounted on the front / rear of a television, the input is determined later. A device for causing subsequent input signals to be output. That is, when an A / V signal is applied through an external A / V input terminal such as watching a video or playing a game with a general television, the microcomputer detects the temporal consecution of the signal input through the A / V input terminal. Then, by applying a subsequent input priority processing control signal to the switching unit for switching the A / V input signal so that subsequent input which is input later in time regardless of the priority is processed first, Priority is assigned to the A / V input terminal, which eliminates the problem of having to use the A / V input terminal with the priority, and saves time. Presenting.

Description

Subsequent input priorities for external audio / video input

The present invention relates to a subsequent input priority processing device for inputting an external audio / video. When an A / V signal is input through an A / V input terminal mounted on the front / rear of a television, the input is determined later. A device for causing subsequent input signals to be output.

In general, a television receives a radio wave transmitted from a transmitting side, demodulates a color composite signal, separates it into a luminance signal and a chromaticity signal, and displays the same on a CRT. That is, the frequency of the desired channel in the tuner is selected to always produce the same intermediate frequency in the intermediate frequency amplifier of the next stage, and the color composite signal is output when the image is detected. The color composite signal is separated into a luminance signal and a chroma signal through a comb filter, and the luminance signal is amplified by a delay circuit by a time delay when demodulating the chroma signal, and then applied to the cathode of the CRT. RT, GY, BY of the chroma signal control the RGB electron beam of the CRT so that a wide range of colors can be reproduced in each pixel unit. The high-pressure 22KV of the CRT serves to guide the RGB electron beam to reach the screen accurately.

In addition, the audio is separated from the video intermediate frequency, subjected to the audio intermediate frequency amplification process, and then FM detected by the demodulator, and separated into a main signal and a sub-signal, subtracted or added through a matrix circuit to obtain stereo L and R. In the case of two languages, the main or sub-signals are output to the L and R speakers as they are.

In the television as described above, when watching a video or playing a game through the A / V input terminal provided on the front / rear side of the television, the front side A despite the time after the inputted time through the A / V input terminal. Priority is set between the / V input terminal and the rear A / V input terminal, and the video is connected to the A / V input terminal even when the game machine is connected to the A / V input terminal to play the game while watching the video. Since the terminals are set as priorities, there is a problem in that the A / V input terminals of the video and the game machine must be switched.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a video system with a television system and to watch a video as described above, and the priority of the A / V input terminal of the video and game machine is determined. The present invention provides a subsequent input priority processing apparatus for an external audio / video input in which subsequent inputs which are input later in time are prioritized by the control of the microcomputer without switching between them.

1 is a block diagram showing a subsequent input priority processing apparatus for external audio / video input according to the present invention;

2 is a flow chart for explaining a subsequent input prior processing device in the external audio / video input of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: antenna 150: tuner circuit

200: IF amplifier 250: image detector

300: image processing unit 350: image amplification unit

400: CRT drive unit 450: CRT

500: voice detector 550: voice processor

600: audio amplifier 650: speaker

700: switching unit 750: microcomputer

800: front A / V input section 850: rear A / V input section

Hereinafter, with reference to the accompanying drawings will be described a specific embodiment for achieving the object of the present invention.

1 is a block diagram illustrating a subsequent input priority processing apparatus when inputting external audio / video according to the present invention.

Referring to FIG. 1, the present invention performs a high frequency amplification of a video signal of a channel selected for display on a screen among high frequency signals received through an antenna 100, and mixes with an oscillation frequency oscillated by channel selection. A tuner unit 150 for converting the intermediate frequency signal into an intermediate frequency signal that is easily amplified, an IF amplifier unit 200 for intermediately amplifying the intermediate frequency signal applied from the tuner unit 150, and the IF amplifier unit 200. Front A / V input unit 800 through an image detector 250 for extracting an image signal from the intermediate frequency signal amplified by the intermediate frequency and the image signal and switching unit 700 outputted from the image detector 250. Or an image processor 300 for processing an image signal applied from the rear A / V input unit 850 and an image signal applied from the image processor 300 to be displayed on the CRT 450. And an image detector 350 applied to the CRT driver 400, an audio detector 500 extracting only an audio signal from the composite video signal applied by being intermediate-amplified from the IF amplifier 200, and the voice. A voice signal output through the detector 500 and a voice processor 550 for processing a voice signal applied from the front A / V input unit 800 or the rear A / V input unit 850 through the switching unit 700; And a voice amplifier 600 for amplifying and outputting an audio signal applied from the voice processor 550 to the speaker 650, and the front A / V input unit on the image processor 300 and the voice processor 550. A switching unit 700 for switching the video signal and the audio signal input from the 800 and the rear A / V input unit 850, and the video signal and audio through the front A / V input terminal to the switching unit 700. Front A / V input unit 800 for applying a signal, and rear A / V input to the switching unit 700. A video signal and an audio signal are detected from the rear A / V input unit 850 and the front A / V input unit 800 and the rear A / V input unit 850 through which the video signal and the audio signal are applied. The microcomputer 750 applies a control signal for first processing a subsequent input signal to the switching unit 700.

Hereinafter, the operation according to an embodiment of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, the composite video signal, which is a high frequency signal received from the antenna 100, is selected and amplified by the tuner 150, and is converted into an intermediate frequency signal to obtain stable amplification and necessary selectivity characteristics. ) Is output and the intermediate frequency is amplified. The intermediate frequency signal amplified from the IF amplifier 200 is applied to the image processor 300 by detecting only an image signal by the image detector 250, and the image processor 300 is an image detector. The image signal applied from 250 is processed, and the image amplifier 350 connected to the image processor 300 demodulates and amplifies the image signal to be suitable for displaying on the CRT 450. ) Is applied.

In addition, the intermediate frequency signal output from the IF amplifier 200 is detected by only the voice signal by the voice detector 500, processed by the voice processor 550, and processed by the voice processor 550 The voice signal is amplified by the voice amplifier 600 and output to the speaker 650.

Here, the A / V signals applied from the front A / V input unit 800 and the rear A / V input unit 850 for inputting the A / V signal through the A / V input terminals mounted on the front / rear of the television are It is output to the switching unit 700 connected to the image processing unit 300 and the audio processing unit 550 and sensed by the microcomputer 750 connected to the switching unit 700. Accordingly, the microcomputer 750 determines which of the front A / V input unit 800 and the rear A / V input unit 850 applies the A / V signal, respectively, to follow the switching unit 700. An input priority processing control signal is applied, and the switching unit 700 receives the front A / V input unit 800 and the rear A / V input unit 850 by a subsequent input priority processing control signal applied from the microcomputer 750. Among the signals output from the first A / V signal is cut off, and only subsequent A / V signals input later are output to the image processing unit 300 and the audio processing unit 550.

Subsequently, a subsequent input priority processing apparatus for external audio / video input of the present invention will be described with reference to FIG. 2.

First, the power of the television is switched on and the channel is tuned to output a broadcast (S10), and in the broadcast output step (S10), the A from the front A / V input unit 800 and the rear A / V input unit 850. It is determined whether the input / V signal is input (S20), and in the A / V signal input determination step (S20), and then, the front A / V input unit 800 and the rear A / V input unit ( In step 850, it is determined which one is a subsequent input which is input later (S30), and whether or not the input through the front A / V input unit 800 is a subsequent input is determined in the subsequent input determination step (S30). In step S50 and in the subsequent input determination step S50, the input through the front A / V input unit 800 is determined as a subsequent input and output (S60), and in the subsequent input determination step S50. An input through the A / V input unit 800 is not a subsequent input, but an input through the rear A / V input unit 850 is a subsequent input. When the input through the rear A / V input unit 850 is separated (S70), and there is no subsequent input among the front A / V input unit 800 and the rear A / V input unit 850 and there is only a line input. In operation S40, the A / V signal of the front A / V input unit 800 or the rear A / V input unit 850 is first output.

As described above, according to the present invention, when an A / V signal is applied through an external A / V input terminal such as watching a video or playing a game with a television, the microcomputer inputs the signal input through the A / V input terminal. After detecting the temporal succession, the normal television is applied by applying a subsequent input priority processing control signal to a switching unit that switches the A / V input signal so that subsequent inputs input later in time regardless of the priority are processed first. Priority is given to the A / V input terminals provided in the system, thereby eliminating the problem of using the A / V input terminals in the priorities, and saving time.

Claims (2)

A tuner unit 150 for receiving a high frequency signal through the antenna 100, An IF amplifier unit 200 for intermediately amplifying the intermediate frequency signal applied from the tuner unit 150 and an image detector 250 for extracting an image signal from the intermediate frequency signal applied from the IF amplifier unit 200; , An image processor 300 for processing an image signal output from the front A / V input unit 800 or the rear A / V input unit 850 through the image signal output from the image detector 250 and the switching unit 700. Wow, An image amplifier 350 for demodulating and amplifying the image signal applied from the image processor 300 to be displayed on the CRT 450 and applying the same to the CRT driver 400; An audio detector 500 extracting only an audio signal from the composite video signal applied by being amplified by the intermediate frequency from the IF amplifier 200; A voice processor 550 for processing a voice signal output from the front A / V input unit 800 or the rear A / V input unit 850 through the voice signal output through the voice detector 500 and the switching unit 700. )Wow, A voice amplifier 600 for amplifying and outputting a voice signal applied from the voice processor 550 to the output of the speaker 650; A switching unit 700 for switching the video / audio signals input from the front A / V input unit 800 and the rear A / V input unit 850 to the image processing unit 300 and the audio processing unit 550; A front A / V input unit 800 and a rear A / V input unit 850 for applying an A / V signal to the switching unit 700 through the front / rear A / V input terminals; The microcomputer detects that the video signal and the audio signal are input from the front A / V input unit 800 and the rear A / V input unit 850 and applies a control signal to the switching unit 700 to process a subsequent input signal. 750, subsequent input priority processing unit for the external audio / video input. 2. The switching unit 700 of claim 1, wherein the switching unit 700 first of the signals output from the front A / V input unit 800 and the rear A / V input unit 850 by a subsequent input priority processing control signal from the microcomputer 750. After the input A / V signal is blocked, only subsequent A / V signals input later are outputted to the image processor 300 and the audio processor 550. Processing unit.