KR19990031458A - How to display stereo / mono discrimination on the main and sub picture - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo / mono discrimination display method for a main screen and a sub-screen in a multi-screen television. When a voice of a broadcast displayed on the main screen of the television and a broadcast displayed on the sub-screen are different from each other, The present invention relates to a stereo / mono discrimination display method of main and sub-screens, which makes it easy to know which voice broadcasts by displaying that the voice of the displayed broadcast is mono or stereo through an OSD screen. To this end, the present invention is to determine whether the voice of the broadcast displayed on the main, side is stereo or mono by the voice demodulation IC based on the audio discrimination function and OSD function of the broadcast displayed on the main screen and sub-screen of the multi-screen television By controlling the microcomputer's control signal, the OSD driving unit displays whether the audio of the sub-screen broadcast is stereo or mono on the sub-screen of the television, so that the audio of the main screen and the sub-screen is stereo even if only the OSD screen on the sub-screen is viewed. It suggests how to display stereo / mono discrimination on the main and sub screens so that it is easy to know whether it is mono.

Description

How to display stereo / mono discrimination on the main and sub picture

The present invention relates to a stereo / mono differential display method for main and sub-screens in a multi-screen television. When the voices of the broadcasts displayed on the main screen of the television and the broadcasts displayed on the sub-screen are different from each other, the display is displayed on the sub-screen. The present invention relates to a stereo / mono discrimination display method of main and sub-screens, which makes it easy to know which voice broadcasts by displaying that an audio of a broadcast is mono or stereo through an OSD screen.

In general, a television receives a high frequency signal transmitted from a broadcasting station through an antenna and displays it on a screen. The color light of a subject sent to an image capturing tube is divided into an RGB signal and made into a YIQ signal in a matrix circuit. In order to easily separate the YIQ signal from the receiving side, the I and Q signals pass through a balance modulator, respectively, to be changed in phase, and then transmitted by mixing color burst signals, horizontal / vertical synchronization signals, and voice signals. do. The transmitted composite video signal is received through an antenna and amplified through a high frequency amplification step to increase sensitivity and selectivity, improve S / N ratio, and increase output. In addition, YIQ signals are obtained through a series of processes such as image detection and bandwidth amplification, synthesized at a constant rate, reproduced as RGB signals, and sent to the CRT for display.

When a multi-screen function is adopted for a television having the above function, a main screen and a plurality of sub-screens (PIP) are displayed on the screen of the television. In order to display the main screen and the sub screen, a separate video screen signal processing system is installed. That is, a main tuner circuit portion for receiving a main video signal displayed on the main screen is provided, and a sub tuner circuit portion for receiving sub video signals displayed on the sub screen is provided, and the main tuner circuit portion and the plurality of sub tuner circuit portions are broadcasted. It is connected to one antenna for receiving a high frequency signal which is a video signal and simultaneously receives all high frequency signals. Therefore, in order to display the sub-screens overlapped with a part of the main screen, a tuner circuit part for a separate sub-screen is installed so that the main screen is not output in the PIP area where the sub-screen is displayed, and the sub-screen is outputted. do.

However, in the above general multi-screen television, when a broadcast program is simultaneously displayed on the main screen and the sub-screen, the OSD screen indicating whether the voice corresponding to the main screen and the voice corresponding to the sub-screen are stereo or mono, respectively. If the main screen and sub screen are displayed at the same time or the main screen or sub screen is displayed on only one screen because it is not displayed clearly, the main screen and the sub screen voices are the same or different. There is a problem that is not easily known.

The present invention has been invented to solve the above problems, and an object of the present invention is to display on the main screen and sub-screen using the voice discrimination function and OSD function of the broadcast displayed on the main screen and sub-screen of the multi-screen television When the voices of the broadcasts are different, the stereo / mono discrimination indication of the main and sub-screens makes it easy to know whether the voice of the broadcasts displayed on the sub-screen of the television is stereo or mono through the OSD screen displayed on the sub-screen. To provide a method.

1 is a block diagram for explaining a stereo / mono discrimination display method of the main, sub-screen of the present invention.

2 is a flow chart illustrating a stereo / mono discrimination display method of the main, sub-screen according to the present invention.

Figure 3a is an exemplary view showing a state that the OSD screen displaying that the voice of the sub-screen is stereo according to the present invention.

Figure 3b is an exemplary view showing a state that the OSD screen displaying that the voice of the sub-screen is mono according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100 antenna 150 first tuner circuit

200: second tuner circuit 250: IF amplifier section

300: PIP mode switching unit 350: PIP signal processing unit

400: first switching unit 450: image processing unit

500: mixing unit 550: CRT driving unit

600: CRT 650: OSD driver

700: microcomputer 750: voice signal detection unit

800: voice processing unit 850: second switching unit

900: voice demodulation IC

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

1 is a block diagram for explaining a stereo / mono discrimination display method of the present invention, a sub-screen.

Referring to FIG. 1, according to the present invention, a channel is tuned for display on a main screen among high frequency signals received through an antenna 100, and a channel is tuned in addition to a high frequency amplification process of a composite video signal of a tuned channel. A first tuner circuit unit 150 for converting the oscillation frequency into an oscillation frequency and converting the oscillation frequency into an intermediate frequency that is easy to amplify, and an intermediate frequency for tuning and amplifying a channel to be displayed on the sub-screen among high frequency signals received through the antenna 100. A second tuner circuit unit 200 for converting the signal into an intermediate frequency, an IF amplifier unit 250 for intermediately amplifying a composite video signal applied from the first tuner circuit unit 150 and the second tuner circuit unit 200, and the IF amplifier unit; PIP mode switching unit 300 for outputting the PIP mode switching according to the control signal of the microcomputer 700, the main image signal and the sub-image signal applied by the intermediate frequency amplification from the unit (250) And a PIP signal processor 350 for receiving the sub video signal and the main video signal from the PIP mode switching unit 300 and the switching unit 500 and performing PIP processing, respectively, and the PIP mode switching unit 300 and PIP. A first switching unit 400 for switching each main image signal and a sub-image signal applied from the signal processing unit 350 according to a control signal of the microcomputer 700, and a main image from the first switching unit 400. An image processor 450 for receiving a signal and an external image signal, demodulating and processing the output signal to the mixer 500, and outputting an OSD RGB signal from the OSD driver 650 to the mixer 500, and the image processor The mixing unit 500 receives the image signal from the 450 and amplifies the image signal to be displayed on the CRT 650 and outputs the same to the CRT driver 550. The audio signal detector 750 detects an audio signal from the image processor 450. ) And audio signals of the main and sub screens from the voice signal detection unit 750. A voice processing unit 800 for receiving and amplifying and processing, and a second switching unit 850 for switching the voice signal of the main screen and the sub-screen voice signal from the voice processor 800 according to the control signal of the microcomputer 700. And a voice demodulation IC 900 which determines whether the audio signal of the main and sub screens that are switched and output from the second switching unit 850 is a stereo signal or a mono signal and applies it to the microcomputer 700. A microcomputer 700 for applying an OSD driving control signal to the OSD driver 650 by receiving a stereo signal or a mono signal of the main and sub-screens differentiated from the voice demodulation IC 900, and controlling the OSD driving from the microcomputer 700. The OSD driver 550 is configured to receive a signal and apply an OSD RGB signal to the image processor 450.

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

First, the high frequency signal received through the antenna 100 is selected by the first tuner circuit unit 150 and the second tuner circuit unit 200 to be displayed on the main screen and the sub-screen, and the first tuner circuit unit 150 and The composite video signal output from the second tuner circuit unit 200 is amplified by the IF amplifier 250 and applied to the PIP mode switching unit 300. The PIP mode switching unit 300 causes the television to be switched to the PIP mode state by the PIP mode switching signal of the microcomputer 700, and outputs the main video signal to the first switching unit 400, and the sub video signal is a PIP signal. Output to the processing unit 350

In addition, the PIP signal processing unit 350 performs a PIP process on the sub video signal output from the PIP mode switching unit 300, and the first switching unit 400 displays the main video signal and the sub video signal in the PIP mode. When applied to the processing unit 450, the image processing unit 450 demodulates and amplifies the image signal output from the first switching unit 400, outputs the mixture to the mixing unit 500, and outputs the same to the CRT 600.

Here, the audio signal detector 750 connected to the image processor 450 detects an audio signal of the main and sub-screens from the image processor 450 and is applied to the audio processor 800, and is applied to the audio processor 800. By amplification and processing. The voice signal of the main and sub-screens processed by the voice processor 800 is switched by the second switching unit 850, and the voice of the main and sub-screens is a stereo signal through the voice demodulation IC 900. Whether it is a mono signal is determined and applied to the microcomputer 700.

That is, when the stereo signal and the mono signal corresponding to the main screen and the sub-screen applied from the voice demodulation IC 900 are different from each other, the microcomputer 700 displays the OSD driver 650 such that the sub-screen is a stereo signal or a mono signal. ) OSD driving control signal is applied. The OSD driver 650 generates an OSD RGB signal to be displayed on the sub-screen according to the control signal of the microcomputer 700 to be applied to the image processor 450.

Accordingly, an OSD screen indicating that the voice of the main screen is different from the voice of the main screen is displayed.

2 is a flowchart illustrating a stereo / mono discrimination display method of main and sub-screens according to the present invention. The present invention relates to a step in which the power of the television is switched on and the channel is tuned in order to watch a broadcast program of the television (S10). In the channel selecting step (S10), the channel is tuned to the PIP mode in which the corresponding broadcast program is displayed, and the PIP output step (S20) in which the broadcast program is displayed on the sub-screen, and the video in the PIP output step (S20). Are simultaneously displayed on the main and sub-screens, and the voice signals corresponding to the main and sub-screens are detected by the voice signal detector 750 (S30) and the main, sub-screen detected by the voice signal detection step (S30). After determining whether the audio signal of the sub-screen is a stereo signal or a mono signal by the voice demodulation IC 900, it is output to the microcomputer 700 to determine whether the voice of the main, sub-screen is different (S40) In step S50, the voice of the main screen is stereo, and the voice of the subscreen is confirmed as mono (S50), and the subscreen of the voice confirmed in the checking step S50 is mono. Outputting an OSD screen to display on the screen (S60), and in the voice discriminating step (S40), the voice of the main screen is mono, and the voice of the subscreen is confirmed in stereo (S80), and the checking step The OSD screen outputs an OSD screen to display stereo on the subscreen (S90) and the voice of the main screen and the subscreen are not different from each other in the voice discrimination step (S80). Is not output, but is performed in step S70 of outputting the same voice.

3A is an exemplary view illustrating a state in which an OSD screen indicating that the voice of a sub-screen is stereo according to the present invention is displayed, and the voice of the main screen applied from the voice demodulation IC 900 to the microcomputer 700 is mono. When the voice of the sub screen is stereo, the OSD screen displaying the stereo on the sub screen is displayed by the microcomputer 700 applying the OSD driving control signal to the OSD driver 650.

3B is an exemplary view showing a state in which an OSD screen indicating that the voice of a sub-screen is mono according to the present invention is displayed, and the voice of the main screen applied from the voice demodulation IC 900 to the microcomputer 700 is stereo. If the voice of the sub-screen is mono, the OSD screen indicating that the microcomputer 700 is mono on the sub-screen by applying the OSD drive control signal to the OSD driver 650.

As described above, the present invention detects an audio signal from the image processor and determines whether the audio of the broadcast displayed on the main screen and the sub-screen of a multi-screen television is stereo or mono, and then displays the main screen and the sub-screen. If the voices of the broadcasts are different from each other, the OSD driving unit applies an OSD RGB signal to the image processing unit by the control signal of the microcomputer to display whether the voice of the sub-screen broadcast is stereo or mono on the sub-screen, Even by looking at the OSD screen, it is easy to see whether the main and sub screens are stereo or mono.

Claims (1)

In step S10, the power of the television is switched on and the channel is tuned in order to watch the program of the television, A PIP output step (S20) in which a channel is tuned in the channel tuning step (S10) and the broadcast program is displayed on a sub-screen by switching to the PIP mode while the corresponding broadcast program is displayed; In the PIP output step (S20), the image is simultaneously displayed on the main and sub-screens, and a voice signal corresponding to the main and sub-screens is detected by the voice signal detector 750 (S30), After the voice signal of the main and sub-screens detected in the voice signal detecting step S30 is determined by the voice demodulation IC 900 as a stereo signal or a mono signal, it is output to the microcomputer 700 to display the main and sub-screens. Determining whether the voice is different (S40), In step S50, the voice of the main screen is stereo, and the voice of the subscreen is monaural (S50). Outputting an OSD screen (S60) to display on the subscreen that the voice of the subscreen identified in the confirmation step (S50) is mono; In step S80, the voice of the main screen is mono, and the voice of the sub-screen is confirmed in stereo (S80); And outputting an OSD screen in order to display stereo on the sub-screen, in which the voice of the sub-screen confirmed in the checking step (S80) (S90) and the voice of the main screen and the sub-screen are the same in the voice discriminating step (S40). When the OSD screen is not output, the same voice output step (S70) consisting of the stereo / mono discrimination display method of the main, sub-screen.