KR19990032160A - Character Display Method of Teletext TV - Google Patents

Abstract

The present invention relates to a television having a teletext function, and more specifically, to lowering the readability of the characters displayed by the teletext function, when the text characters are displayed in capital letters, the lowercase letters are selected by the viewer. The present invention relates to a character display method of teletext television which is outputted by changing to.

In the text display method of the teletext television of the present invention, the tuner unit 110 receives a broadcast signal received through an antenna and tunes to a specific channel and outputs the intermediate frequency signal IF, and the tuner unit 110. A preamplifier 130 for amplifying an output signal of the preamplifier, a video signal processor 140 for detecting and demodulating the video signal from the output signal of the preamplifier 130, and a video signal demodulated by the video signal processor 140. CRT (141) for outputting the screen to the screen, the teletext decoder 150 for demodulating the teletext included in the output signal of the image signal processing unit 140, and receives an external operation command signal by the user accordingly A teletext television comprising a microcomputer (160) for controlling the first step, comprising: a first step of detecting whether a text character is an uppercase letter by detecting an input of a teletext signal by the microcomputer (160); A second step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in a state in which the teletext characters recognized in the first step are not all capital letters; A third step of recognizing whether there is an input of a character conversion command by the user when the teletext character recognized in the first step is determined to be all capital letters; A fourth step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in the input state if the input of the character conversion command is not detected; And a fifth step of outputting a text character after converting the uppercase letter to the corresponding lowercase letter in the microcomputer 160 when the character conversion command is input.

Description

Character Display Method of Teletext TV

The present invention relates to a television having a teletext function, and more specifically, to lowering the readability of the characters displayed by the teletext function, when the text characters are displayed in capital letters, the lowercase letters are selected by the viewer. The present invention relates to a character display method of teletext television which is outputted by changing to.

In general, a television is a device that receives a plurality of broadcast signals transmitted from a broadcasting station, tunes a specific channel, demodulates it, and outputs a video signal and an audio signal through a CRT and a speaker. In addition, in recent years, due to the development of transmission technology, text multicasting (teletext) has emerged, and thus, it is possible to provide respective specialized information in many channels.

As shown in FIG. 1, the conventional character TV broadcast receiver includes a tuner unit 110 that receives a broadcast signal received through an antenna, tunes to a specific channel, and outputs an intermediate frequency signal IF. And a voice signal processor 120 for detecting and demodulating a voice signal from the signal output from the tuner 110, a sound amplifier 121 for amplifying an output signal from the voice signal processor 120, and the sound. In response to the output of the amplifier 121, the speaker 122 for outputting a voice signal to the outside, the preamplifier 130 for amplifying the output signal of the tuner unit 110, and the output signal of the preamplifier 130 The video signal processor 140 detects and demodulates the video signal, the CRT 141 outputs the demodulated video signal from the video signal processor 140 to the screen, and the output signal of the video signal processor 140. Demodulating old teletext The micro decoder 150 receives an external operation command signal from a user, controls the system according to the user, and a memory 161 connected to the microcomputer 160 to store information on the operation of the system. It is configured to include.

The memory 161 generally uses a nonvolatile memory device. For example, the memory 161 uses an electrically erasable and programmable read only memory (EEPROM) that is a memory device capable of electrically erasing and storing data.

The operation state of the conventional teletext television receiver having the above configuration is as follows. When the RF signal is received through the antenna, the tuner 110 automatically tunes to a specific channel according to the control signal input by the viewer and outputs an intermediate frequency IF.

The voice signal included in the output signal is demodulated while sequentially passing through the voice signal processor 120, the sound amplifier 121, and the speaker 122, and then is output at an audible frequency. In addition, the video signal is demodulated while sequentially passing through the preamplifier 130, the video signal processor 140, and the CRT 141, and then output as a viewable image.

In this case, the teletext decoder 150 simply demodulates the teletext included in the video signal and outputs a separate R, G, B signal to the video signal processor 140 to be distinguished from the general PIF video signal. ) To the outside.

On the other hand, the microcomputer 160 is to adjust the channel change, volume, color, etc. by the remote control (Remocon) signal light by the user. At this time, the memory 161 stores operation information preset for a specific key.

In the conventional teletext television as described above, a specific character (English letter) output by the teletext function is output in all capital letters. This is mainly caused when using the teletext television in the English-speaking rights, and the non-English speaking users or viewers who are not familiar with capital letters have a problem in that the readability of the teletext characters is degraded and the important contents are not recognized.

The present invention has been made to solve the above problems, an object of the present invention is to select the viewer when the teletext characters are displayed in capital letters in order to enhance the readability of the characters displayed by the teletext function The present invention provides a character display method of a teletext television that outputs the lowercase letter by changing it to a lowercase letter.

Character display method of the teletext television of the present invention for achieving the above object, the tuner unit 110 for receiving a broadcast signal received through the antenna and tuning to a specific channel and outputting the intermediate frequency signal (IF), A preamplifier 130 for amplifying the output signal of the tuner unit 110, a video signal processor 140 for detecting and demodulating a video signal from the output signal of the preamplifier 130, and the video signal processor 140 CRT 141 for outputting the demodulated video signal to the screen, the teletext decoder 150 for demodulating the teletext included in the output signal of the video signal processor 140, and an external operation command signal by the user. In the teletext television comprising a microcomputer (160) for receiving the input and control the system accordingly, the first to determine whether the text character is uppercase by detecting the input of the teletext signal from the microcomputer (160) System; A second step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in a state in which the teletext characters recognized in the first step are not all capital letters; A third step of recognizing whether there is an input of a character conversion command by the user when the teletext character recognized in the first step is determined to be all capital letters; A fourth step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in the input state if the input of the character conversion command is not detected; And a fifth step of outputting a text character after converting the uppercase letter to the corresponding lowercase letter in the microcomputer 160 when the character conversion command is input.

1 is a schematic configuration diagram of a teletext television conventionally used;

Fig. 2 is a flowchart for explaining a character display method of the teletext television of the present invention.

3A and 3B are front views of a television showing the state converted by the method of the present invention.

<Explanation of symbols for main parts of the drawings>

110: tuner unit, 120: voice signal processing unit,

121: sound amplifier, 122: speaker,

130: preamplifier, 140: video signal processing unit,

141: CRT, 150: teletext decoder,

160: microcomputer, 161: memory,

170: television, 172, 172a: teletext character display unit.

Hereinafter, with reference to the accompanying drawings will be described in detail the character display method of the teletext television of the present invention.

The method of the present invention is a method for preventing the display of uppercase or lowercase letters in a batch when displaying a teletext character, especially a case-sensitive character such as an English letter, on a television screen. When a character is input, it is recognized and case is recognized and the character is replaced and displayed according to the viewer's command. The character display method of the present invention can be performed in a conventional teletext television such as shown in Fig. 1, so that detailed description of the circuit is omitted.

The character display method of the present invention as described above comprises the following steps: a first step of determining whether a text character is an uppercase letter by detecting an input of a teletext signal in the microcomputer 160; A second step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in a state in which the teletext characters recognized in the first step are not all capital letters; A third step of recognizing whether there is an input of a character conversion command by the user when the teletext character recognized in the first step is determined to be all capital letters; A fourth step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in the input state if the input of the character conversion command is not detected; And a fifth step of outputting a text character after converting the uppercase letter to the corresponding lowercase letter in the microcomputer 160 when the character conversion command is input, which will be described with reference to the flowchart of FIG. 2.

When the television is operated and a teletext signal is input among the signals received through the tuner unit 110, it is input from the image signal processor 140 to the teletext decoder 150. Meanwhile, the microcomputer 160 also detects the teletext signal input by the signal from the image signal processor 140. When the teletext signal is input, the microcomputer 160 detects whether the input teletext character is an uppercase letter. Such case sensitivity is recognizable by character data including teletext characters.

As a result of the teletext character recognition in the microcomputer 160, if all the detected characters are recognized in capital letters, the microcomputer 160 detects whether there is a character conversion command input from the viewer. This is to prevent unnecessary conversion operation in advance because capital letters can be recognized by the viewer. The character conversion command from the viewer is input to the microcomputer 160. That is, when it is determined that all the output characters are incapable of readability as capital letters, the viewer may perform character conversion by pressing a remote control or a TV command input key.

If the character conversion command is not input from the viewer, the microcomputer 160 outputs the currently input teletext character. That is, the text is output as the original text state demodulated by the teletext decoder 150. FIG. 3A is a front view of a television showing a state in which all the teletext characters are output in uppercase letters in the state in which the text conversion in the teletext decoder 150 is not performed. As shown, it can be seen that the unchanged capital letter is displayed on the teletext character display unit 172 located at the bottom of the screen of the television 170.

However, when a character conversion command is input from the viewer, the microcomputer 160 outputs a control signal for changing the uppercase letter to the lowercase letter. That is, the microcomputer 160 recognizes the font corresponding to the English uppercase letter and changes the character control code to the corresponding lowercase font.

In this case, the character control code referenced by the microcomputer 160 may be easily configured using an OSD (On Screen Display) font control code. That is, although not shown in the drawing, the OSD font control code used in the OSD generating unit for displaying a specific character (not a teletext character) according to the control signal of the microcomputer 160 may be used.

When the character is converted to uppercase-> lowercase as described above, the converted teletext character is output from the teletext decoder 150 and input to the image signal processor 140. The image signal processor 140 displays the input lowercase letter on the CRT 141 as in the prior art.

FIG. 3B is a front view of a television 170 showing a state in which the uppercase letter of FIG. 3A is converted to lowercase by the method of the present invention. As shown, it can be seen that all characters of the teletext character display unit 172a are displayed in lowercase. The character conversion display as described above is converted into one frame unit and continues to be output. That is, the character conversion command input by the viewer continues to operate until the next character conversion command release signal is input. In addition, when the input of the teletext signal transmitted from the broadcasting station is stopped, the microcomputer 160 recognizes this and automatically stops performing the character conversion operation.

According to the character display method of the teletext television of the present invention as described above, in order to improve the readability of the character displayed by the teletext, if the text character is displayed in uppercase, There is an advantage to printing.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications will belong to the appended claims. .

Claims (2)

A tuner unit 110 which receives a broadcast signal received through an antenna and tunes to a specific channel and outputs an intermediate frequency signal IF; and a preamplifier 130 amplifying the output signal of the tuner unit 110; And a video signal processor 140 for detecting and demodulating the video signal from the output signal of the preamplifier 130, a CRT 141 for outputting the video signal demodulated by the video signal processor 140 to the screen; Teletext including a teletext decoder 150 for demodulating the teletext included in the output signal of the image signal processor 140 and a microcomputer 160 for receiving an external operation command signal from a user and controlling the system accordingly. In television, A first step of detecting the input of the teletext signal from the microcomputer 160 to determine whether the text character is an uppercase letter; A second step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in a state in which the teletext characters recognized in the first step are not all capital letters; A third step of recognizing whether there is an input of a character conversion command by the user when the teletext character recognized in the first step is determined to be all capital letters; A fourth step of outputting a control signal from the microcomputer 160 to the teletext decoder 150 to output the text characters in the input state if the input of the character conversion command is not detected; And And a fifth step of outputting text characters after converting the uppercase letters to the corresponding lowercase letters in the microcomputer 160 when the character conversion command is input. The method of claim 1, wherein the character conversion is performed by using an OSD font in performing the character conversion operation in the fifth step.