KR20010110550A - Broadcasting system setting apparatus and method for television - Google Patents

Abstract

The present invention relates to an apparatus and method for setting a broadcast system for a TV. In the related art, a transient phenomenon on a screen is generated by a channel switching time when a channel is set by checking each system to determine a color system, and a black and white screen. As a result, there is a problem in that a delay of a color in which a color screen is shown after the drawing is generated. Accordingly, the present invention has been made to solve the above-described problems, and by receiving a country-specific code according to whether the broadcast method is set, selecting a color system and a vertical frequency according to the corresponding broadcast method to determine the broadcast method and By minimizing the time required for switching, there is an effect of preventing the transient phenomenon of the screen.

Description

TV broadcast method setting apparatus and method {BROADCASTING SYSTEM SETTING APPARATUS AND METHOD FOR TELEVISION}

The present invention relates to an apparatus and method for setting a broadcast method for a TV, and more particularly, to an apparatus and method for setting a broadcast system for a TV to automatically set a color system and a vertical frequency using a country-specific code in setting the TV's broadcast method. It is about.

Prior to receiving the conventional broadcast signal, the broadcast signal input from the tuner is demodulated using the oscillation frequency of the image processing apparatus according to the broadcast method of the broadcast station, and automatically discriminated based on the identification signal suitable for the color system.

That is, as shown in FIG. 1, after setting the initial color carrier frequency to 4.43 MHz, it is determined whether the received broadcast method is PAL, NTSC, or SECAM, and the corresponding broadcast method. It operates until the time when the next vertical synchronization signal is applied to determine whether the corresponding broadcast method is suitable, and if appropriate, sets the TV as the corresponding broadcast method.

However, if the broadcast method is not suitable or there is no broadcast method at the set color carrier frequency, the broadcast method is determined by determining whether the color carrier frequency is NTSC or SECAM after setting the color carrier frequency to 3.58 MHz. As a result, it operates until the time when the next vertical synchronization signal is applied, determines whether the corresponding broadcast scheme is suitable, and sets the broadcast scheme if appropriate.

At this time, if the broadcast method selected until the next vertical synchronization signal is not suitable or the corresponding broadcast method does not exist, the operation is repeated until the broadcast method is set.

As described above, according to the conventional system, each system is checked to determine a color system, so that a transient phenomenon occurs on the screen by the channel switching time when the channel is set, and a color delay in which a color screen is shown after a black and white screen is shown. There was a problem that the phenomenon occurs.

Accordingly, the present invention has been made to solve the above-mentioned problems, and provides an apparatus and method for setting a broadcast system for a TV to automatically set a color system and vertical frequency by searching for a broadcast method using a country-specific code. Has its purpose.

1 is a flow chart showing a conventional TV broadcast method setting operation.

Figure 2 is a block diagram showing the structure of a TV to which the present invention is applied.

3 is a flowchart illustrating a broadcast method setting operation in FIG. 2;

4 is a flow chart showing a data retrieval operation in FIG.

5 is a table showing a color system and vertical frequency according to country codes.

*** Description of the symbols for the main parts of the drawings ***

10: antenna 20: tuner

30: color image processing unit 31: detection and demodulation unit

32: color image output unit 33: vertical synchronization unit

40: nonvolatile memory 50: microcomputer

60: Citi

According to an aspect of the present invention, there is provided a color image processing unit configured to display a color image by processing a color image by a control signal after detecting and demodulating a high frequency signal received through a tuner; A nonvolatile memory for storing color systems and vertical frequencies according to country codes; And a microcomputer that controls the operation of the color image processing unit in a broadcasting method determined by accessing the nonvolatile memory by a country code or a country name.

In addition, the present invention comprises a first step of determining whether to set the color system when the TV is powered on; A second step of selecting a corresponding country name by displaying a unique country code and a country name if a country unique code is not input in the first step; A third step of searching for a corresponding color system and a vertical frequency by a country unique code input in the first step and a country name selected in the second step; When the operation of the third step is completed, it is determined whether or not to store it, characterized in that the fourth step of fixing the color system and the vertical frequency.

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

2 is a block diagram showing the structure of a TV to which the present invention is applied, and a tuner 20 for selectively receiving a broadcast signal through an antenna 10 by a control signal as shown in the figure; A color image processing unit 30 for outputting a color image by processing a high frequency signal RF of the tuner 20 after detecting and demodulating the control signal; A nonvolatile memory 40 for storing color systems and vertical frequencies according to country codes; A microcomputer (50) for accessing the nonvolatile memory (40) by a country-specific code or a country name to search for a broadcasting scheme and to control the operation of the color image processor (30); A color image processing unit 30 displays an output signal of the color image processing unit 30, and the color image processing unit 30 detects and demodulates a high frequency signal RF of the tuner 20. (31); A color image output unit 32 outputting a color image by processing the output signal of the detection and demodulation unit 31 according to the control signal of the microcomputer 50; A vertical synchronization unit 33 for outputting a vertical synchronization signal selected by the control signal of the microcomputer 50, which will be described in detail with reference to FIGS. 3 to 8 attached to the operation process according to the present invention. do.

When power is applied to the first TV, the microcomputer 50 shows the user whether or not to set the color system when the color system and the vertical frequency are not set or the user wants to reset the broadcasting method through the remote control setting key. Determines whether to set the color system using the hotkeys on the remote control.

When the user wants to set a color system, the microcomputer 50 prompts the user to enter a country unique code and receives a country unique code from the user.

However, if the user does not know the country unique code, the microcomputer 50 shows the country unique code and country name as shown in FIG. 5 and receives the country name from the user.

Accordingly, the microcomputer 50 finds the color system and vertical frequency information stored in the nonvolatile memory 40 by a country-specific code or country name input by the user.

That is, the microcomputer 50 is a country-specific code '1', '82', 'arranged in order from the country using the first country-specific code input to the non-volatile memory 40 to the least 55 'and' 54 'are sequentially determined to find a corresponding color system and vertical frequency, and output the color system and the vertical frequency to the color image processor 30.

The microcomputer 50 stores the color system and the vertical frequency according to whether the found color cyste and the vertical frequency are stored to the user, and determines whether to reset the broadcast method when the next power is applied.

The color image processing unit 30 detects and demodulates a high frequency signal RF input from the tuner 20 by a color system and a vertical frequency input from the microcomputer 50, and processes the color image. It is shown in the C60.

As described in detail above, the present invention receives a country-specific code according to whether the broadcast method is set, and selects a color system and a vertical frequency according to the corresponding broadcast method, thereby minimizing the time required for determining and switching the broadcast method. It is effective to prevent the phenomenon of excessive screen.

Claims (4)

A color image processing unit for displaying a high-frequency signal received through the tuner through a color image by processing a color image by a control signal after detection and demodulation; A nonvolatile memory for storing color systems and vertical frequencies according to country codes; And a microcomputer for controlling the operation of the color image processing unit in a broadcasting method determined by accessing the nonvolatile memory by a country-specific code or a country name. The display apparatus of claim 1, wherein the color image processor comprises: a detector and a demodulator configured to detect and demodulate a high frequency signal; A color image output unit configured to output a color image by processing an output signal of the detection and demodulation unit according to a color system set in a microcomputer; And a vertical synchronizing unit for outputting a vertical synchronizing signal set by the microcomputer. Determining whether a color system is set when the TV is powered on, and inputting a country unique code; A second step of selecting a corresponding country name by displaying a unique country code and a country name if a country unique code is not input in the first step; A third step of searching for a corresponding color system and a vertical frequency by a country unique code input in the first step and a country name selected in the second step; And a fourth step of fixing the color system and the vertical frequency by determining whether or not the storage is completed when the operation of the third step is completed. 4. The method of claim 3, wherein the searching operation of the color system and the vertical frequency of the third step sets the corresponding color system and the vertical frequency by comparing the inputted country specific code with the country specific codes arranged according to the country ranking in which the system is to be used. Method of setting a broadcast method of a TV, characterized in that consisting of steps.