KR19990034050A - How to automatically switch between PIP two screen languages on a television - Google Patents

Abstract

In a method of displaying languages (Spanish, Portuguese, English, etc.) according to a broadcasting method in a three-system PIP television receiver capable of tuning a plurality of broadcasting methods through an OSD, PAL is used as a vertical sync of the received broadcasting. A first process of determining whether or not a broadcast method is used, a second process of signal processing by a PAL-N broadcast method when the received broadcast method is determined to be PAL-N, and PAL- if the received broadcast is not a PAL-N broadcast; If the signal is detected by the M broadcast method to determine whether the color signal is detected, the third process of signal processing using the PAL-M broadcast method, and if the color signal is not detected in the second process, the signal is processed by the NTSC broadcast method. In the fourth step, if the recognized broadcasting method is a PAL-N broadcasting method, the language is Spanish as a language, and if the recognized broadcasting method is a PAL-M broadcasting method, it is in Portuguese, and if the NTSC broadcasting method is used, the OSD is generated in English. A fifth process of activating the process; and a sixth process of driving the OSD generator by processing a broadcasting method and a language of the sub-screen in the same manner as the process from the first process to the fifth process; and the fifth process and the sixth process In a three-system television, the language automatic switching method for two PIP screens is provided. There is no need to switch between languages.

Description

How to automatically switch between two picture screens on a TV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main / sub picture display in a PIP type television receiver capable of tuning a plurality of broadcast methods. In particular, the present invention relates to a main / sub picture when displaying a video signal according to another broadcast method on a main / sub picture. The present invention relates to a method of automatically switching a language corresponding to a displayed broadcasting method and displaying the same through an OSD.

A television broadcast receiver, generally called a TV, receives a radio frequency signal transmitted at an arbitrary high frequency from a broadcasting station, extracts only a frequency band of a tuned channel, and extracts an intermediate frequency from the extracted broadcast frequency again, thereby extracting an audio signal and a video signal. Process the separated video signal into a predetermined state and provide the received image to the user through the CRT, which is a display means, and the audio signal is filtered and amplified to a predetermined state and then the user through the speaker which is an audio output means. Listen to the sound you receive.

Recently, when several people watch television at the same time according to the diversification of people's preferences, viewers often want to watch different programs. There is a limit that only the channel of is displayed. Therefore, PIP (Picture In) is a technology that overcomes these limitations and implements a screen different from the main screen (hereinafter referred to as a sub-screen) on one CRT on the screen (hereinafter referred to as the main screen) that is originally displayed on the entire CRT. Picture method has been proposed.

The PIP-type television outputs a video signal of a plurality of channels selected on the same CRT screen, but the video signal of the main channel is displayed on the entire screen, and the video signal of the sub-channel is output within a predetermined range of one corner of the screen. .

Referring to FIG. 1 attached to a simplified configuration of an image portion of a television broadcast receiver applying the PIP scheme, a system for tuning a specific channel by receiving a broadcast signal of multiple channels transmitted from a broadcasting station through an antenna is described. 1, the second tuning unit (100A, 100B), the main image processing unit (200A) for detecting and outputting the video signal and the corresponding horizontal / vertical synchronization signal in the broadcast channel tuned by the first tuning unit (100A), After detecting the video signal in the broadcast channel tuned by the second tuning unit 100B, the sub image processing unit 200B reduces the screen so as to correspond to the set sub-screen area and outputs the sub image processing unit 200B, and the main image processing unit 200A. And a mixer 300 for mixing the image signal output from the sub image processing unit 200B and transmitting the image signal to the CRT driving unit, and controlling the sub image processing unit 200B to display the display area of the sub-screen. It consists of a microcomputer 500 for setting and controlling the image processing accordingly, and a television receiver for displaying the video signal output from the mixer.

A general operation of the PIP-type television configured as described above will be described below. The video signal selected through the first tuning unit is output through a general video signal processing process through the main video processing unit, and the video signal tuned through the second tuning unit. In order to be displayed on the display area set by the control of the microcomputer, the sub image processor is reduced and output in the vertical and horizontal directions by a predetermined ratio. The image signal output from the main image processing unit and the sub image processing unit is mixed with the mixer as an input and displayed on a television receiver.

At this time, the television broadcast signal is different from country to country, for example, France and Eastern European countries (Russia and neighboring countries) is using the SECAM method, Europe except France is using the PAL method. In addition, the Pacific Rim countries, mainly in the United States, use NTSC television broadcasting.

Therefore, television receivers process video signals according to the broadcasting system in the country of use. In Europe, PAL and SECAM systems are often mixed, and PAL-N / PAL-M and NTSC systems are mixed in Latin America. In many cases, a TV suitable for all of the above broadcasting methods has been developed.

Therefore, when a plurality of broadcasting methods exist in the border region of a specific country, when the above-mentioned PIP function is executed, a video signal of another broadcasting method may be displayed on the main / sub screen. There is a problem that the user must switch the language corresponding to the broadcasting method of the / sub screen by the key input.

An object of the present invention for solving the above problems, when displaying a video signal according to a different broadcast method on the main / sub-screen of the television in an area that can receive a television broadcast signal according to a plurality of broadcast methods, The present invention provides a method of automatically switching a language corresponding to a broadcasting method displayed on a main / sub screen to display through an OSD.

1 is a simplified configuration diagram of an image processing portion in a television receiver having a conventional PIP function.

2 is a flowchart illustrating a language automatic switching operation during PIP two screens according to the present invention.

Explanation of symbols on the main parts of the drawings

100: tuner 200: image processor

300: mixer 400: microcomputer

In order to achieve the above object, a feature of the present invention is to display languages (Spanish, Portuguese, English, etc.) according to a broadcasting method in a three-system PIP television set that can tune a plurality of broadcasting methods through an OSD. In the method,

A first process of determining whether the PAL-N broadcast method is a vertical synchronization of the received broadcast; a second process of signal processing with the PAL-N broadcast method if the received broadcast method is determined to be a PAL-N broadcast method; A third step of performing signal processing in the PAL-M broadcasting method when the broadcasting is not the PAL-N broadcasting method and determining whether a color signal is detected by processing the signal in the PAL-M broadcasting method; If the color signal is not detected in the third process, a fourth process of processing a signal using the NTSC broadcast method; and if the recognized broadcast method is a PAL-N broadcast method, Spanish as a language and the recognized broadcast method is a PAL-M broadcast method. In Portuguese, in the NTSC broadcasting method, a fifth process of driving the OSD generator in English and a sixth process of driving the OSD generator by processing the broadcasting method and the language of the sub-screen in the same manner as the processes from the first to fifth processes. And a seventh process of mixing the OSD molecular images output through the OSD generator in the fifth process and the sixth process and displaying them on the screen.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 2 is a flowchart illustrating an operation according to an exemplary embodiment.

In the state in which the main / sub picture is displayed (S10), the broadcast method of the main screen is determined using the vertical synchronization signal of the received broadcast (S20), and if the PAL-N method is used, signal processing is performed using the PAL-N broadcast method. If it is not N broadcast system, it processes PAL-M signal and judges whether color signal is detected. If color signal is detected, PAL-M signal is processed. If color signal is not detected, NTSC method is used. do. While processing signals according to the broadcasting method, the PAL-N method selects Spanish as the language, the PAL-M method selects Portuguese as the language, and the NTSC method selects English as the language (S30) to drive the OSD generator (S40). .

In the case of the sub picture, as in the case of the main picture, the broadcast method is determined based on the vertical synchronization signal of the received broadcast (S50). If the determined broadcast method is the PAL-N broadcast method, the PAL-N method is used as the PAL-N broadcast method. Otherwise, the PAL-M broadcast method is used. If it is determined that the PAL-M broadcasting method is used, the broadcasting method is changed depending on whether the color signal is detected by processing the signal. If the color signal is detected, the signal is processed in the PAL-M method as it is. To process the signal. While processing signals according to the broadcasting method, the PAL-N method selects Spanish as the language, the PAL-M method selects Portuguese as the language, and the NTSC method selects English as the language (S60) to drive the OSD generator (S70). . The OSD text image output through the OSD generator is mixed (S80) to display the OSD text on the main / sub screen of the television receiver (S90).

According to the present invention operated as described above, when a video signal of a different broadcast method is displayed on the main / sub-screens, respectively, the corresponding language is also automatically switched, so that a user inputs a key individually according to the displayed broadcast method. This can improve the inconvenience of changing the language.

Claims (1)

In the method of displaying the languages (Spanish, Portuguese, English, etc.) according to the broadcasting method in a three-system PIP television receiver capable of tuning a plurality of broadcasting methods through the OSD, A first process of determining whether a PAL-N broadcast method is used as a vertical synchronization of the received broadcast; A second process of signal processing in the PAL-N broadcasting method when the received broadcasting method is determined as the PAL-N broadcasting method; Determining whether a color signal is detected by processing a received signal using the PAL-M broadcast method if the received broadcast is not the PAL-N broadcast method; A fourth process of processing the signal by the NTSC broadcasting method when the color signal is not detected in the third process; A fifth step of driving the OSD generator in English if the recognized broadcasting method is a PAL-N broadcasting method, Spanish as a language, and if the recognized broadcasting method is a PAL-M broadcasting method, in Portuguese and in the NTSC broadcasting method, in English; A sixth process of driving an OSD generator by processing a broadcasting method and a language of a sub-screen in the same manner as the processes of the first to fifth processes; In the fifth process and the sixth process in the sixth process of the OSD molecular image output through the OSD generation unit is a seventh process of displaying on the screen by mixing on the screen characterized in that the PIP two screen language automatic switching method