KR20000045834A - Method for decreasing size of text letter of television - Google Patents

Abstract

PURPOSE: A method for decreasing the size of text letters of a television is provided to shrink the size of the teletext letter in order to increase readability. CONSTITUTION: A method for decreasing the size of text letters of a television includes firth thru third steps. At the first step(S102), whether text exists in the current program is determined from the information added on the broadcasting signal. At the second step(S106), whether the reception of text letter broadcasting is determined is detected when text exists in the current program in the first step. At the third step(S109), the size of the text letter is decreased and the text letter is displayed when the reception of text letter broadcasting is determined in the second step(S106).

Description

Size reducing method of text letter in television

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing subtitles and confusion of video when a teletext text broadcast is received on a television. In particular, when a subtitle is present in a television broadcast program, the user unconsciously transmits the teletext text broadcast to a current screen. In the case of overlapping, the present invention relates to a method of reducing the text character size of a television for reducing the size of the teletext character so that the viewer can easily view the subtitles of the television broadcast.

Figure 1 shows a block diagram of a conventional general television.

As shown in the drawing, a conventional general television tuner 50 extracts only a frequency band of a channel selected by a user by tuning a radio frequency signal received through an antenna ANT from airwaves, and according to an input local oscillation signal. IF detector 60 for detecting an intermediate frequency from the frequency band signal of the channel tuned through the tuner unit 50, and an image intermediate frequency signal (PIF) and audio from the signal output from the IF detector 60. P / S separation unit 70 for separating the intermediate frequency signal (SIF), and voice detector for separating the voice signal (S) from the voice intermediate frequency signal (SIF) output from the P / S separation unit (70) And an image detector 110 for separating the image signal P from the image intermediate frequency signal PIF output from the P / S separator 70, the audio detector 80, and an input. After the voice signal (S) of the external device 150 is selected according to the input control signal Select a predetermined signal according to a selection signal input from the audio processor 90 that is externally displayed through the speaker 100 and the image signal P of the image detector 110 and the external device 150. Thereafter, the luminance signal and the color signal are separated, and each color band is extracted from the color signal, and then demodulated and transmitted to the CRT 140. The image processor 120 receives a signal corresponding to the input operation control signal. Characters out of the OSD (On Screen Display) 130 to output predetermined information on the screen of the CRT 140 and the video signal P output from the P / S separation unit 70. Character detection unit 160 that detects and processes data in a form that can be output and outputs to CRT 140, and a key panel for selecting various operation modes (tuning, volume control, screen control, external device mode switching, etc.) of the television. 10 and various operations of the above-described television A remote controller 20 to remotely control a mode, a remote controller key signal input unit 30 that receives a signal output from the remote controller 20 and outputs a signal according to the remote controller 20, and the key panel 10 or the remote controller key signal input unit And a microprocessor 40 for controlling the overall operation of the television by controlling the corresponding component in accordance with the signal output from the 30.

The operation of such a television is explained as follows.

When the user selects a broadcast channel using the key panel 10 or the remote controller 20, the microprocessor 40 outputs a corresponding tuning voltage to the tuner unit 50 to tune the corresponding channel. As described above, in the broadcast signal of the broadcast channel tuned by the tuner unit 50, an intermediate frequency is detected from the broadcast signal through the IF detector 60, and the voice intermediate frequency is passed through the P / S separation unit 70. The signal SIF and the image intermediate frequency signal PIF are separated.

The voice intermediate frequency signal SIF output from the P / S separation unit 70 passes through the voice detector 80 and the voice signal S is detected, and the voice processor 90 undergoes a predetermined process. The image intermediate frequency signal PIF output through the speaker 100 and output from the P / S separation unit 70 passes through the image detector 34 to detect the image signal P, thereby processing the image processor 120. ) Is output to the CRT 140 through a predetermined process, and is applied to the character detector 160 to detect a character from the signal, and is similarly output to the CRT 140 through a predetermined process.

Meanwhile, the television displays a menu screen, channel change information, volume change information, and input signal (RF or AV input) change information in the form of characters or figures on a video screen displayed by the CRT 140. It is equipped with OSD function, and OSD function displays the corresponding character screen on the background of the displayed image screen or displays the corresponding character screen on the blue-back image screen. This is a very useful feature to make it easy to recognize.

However, in the above-described conventional television, when the user enters the teletext mode while watching the television with the subtitles, the text characters are displayed around the area where the subtitles exist, thereby causing the viewer not to recognize the subtitles correctly. Was made.

An object of the present invention for solving the problems of the prior art as described above is to reduce the size of the teletext character when the user unconsciously overlaps the teletext character broadcast on the current screen when there is a subtitle in the television broadcast program. The present invention provides a method of reducing the text character size of a television so that a subtitle of a television broadcast can be easily viewed by a viewer.

1 is a block diagram of a general television

2 is a block diagram of a television adopted in accordance with the present invention;

3 is a flow chart of a method of reducing the size of text characters in a television according to the present invention.

<Explanation of symbols for main parts of drawing>

10 key panel 20 remote control

30: remote control key signal input unit 40: microprocessor

50: tuner 60: IF detector

70: P / S separation unit 80: voice detector

90: voice processing unit 100: speaker

110: image detector 120: image processor

130: OSD unit 170: KBPS decoder

140: CRT 150: external device

160: character detection unit

A feature of the present invention for achieving the above object is that, in a television capable of receiving a broadcast signal of a broadcast system providing an extended data service, whether a subtitle exists in a program currently received from information added to the broadcast signal. A first step of determining, a second step of determining whether the reception of the text character broadcast is determined by the user when it is determined that the subtitle exists through the first process, and the reception of the text character broadcast through the second step If it is determined that the determination is determined to include a third step of reducing the size of the text character after detection of the received text character.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

The configuration of the television employed in the embodiment of the present invention further includes a decoder of KBPS (Korea Broadcasting Program System), which is one of broadcast systems providing extended data services to a general television as shown in FIG.

That is, the key panel 10, the remote controller 20, the remote controller key signal input unit 30, the microprocessor 40, the tuner unit 50, the IF detector 60, the P / S separator 70, and the voice. The detector 80, the voice processor 90, the speaker 100, the image detector 110, and the image processor 120, the OSD unit 130, the CRT 140, the character detector 160, and the KBPS decoder And 170.

In such a configuration, the key panel 10 or the remote controller 20 is an input means for operating the television, and includes a volume up / down key for volume control and a predetermined key (menu key, image quality control key, Remote control unit 20 having a plurality of keys including a direction key, a number key), a key for sound quality setting, and a key for image quality setting, and outputs a key signal corresponding to a user's key operation, and is typically remotely inputable. A key signal corresponding to a key operation is transmitted on an infrared carrier using a remote controller, and the remote controller key signal input unit 30 provided in the television body demodulates, detects, and amplifies the received infrared carrier to be described later. Is applied.

The microprocessor 40 controls the overall operation of the television based on the key signal from the key panel 10 or the remote controller 20, and in particular, based on the data about the program genre detected by the KBPS decoder 170. If necessary, a control signal for adjusting the OSD position is output to the OSD unit 130.

The tuner unit 50 outputs a broadcast signal received by being tuned to a channel corresponding to the control of the microprocessor 40.

Meanwhile, the voice processing unit 90 is a signal capable of outputting a voice signal received by the tuner unit 30 and applied through the IF detector 60, the P / S separation unit 70, and the voice detector 80. Processed and output to the speaker 100, and adjusts the volume of the output under the control of the microprocessor (40).

The image processor 120 processes the image signal received from the tuner unit 30 and applied through the IF detector 60, the P / S separation unit 70, and the image detector 110 into a displayable signal, thereby providing a CRT. Output to 140.

In addition, the OSD unit 130 is a character screen display unit for synthesizing the OSD text signal corresponding to the control of the microprocessor 40 to the image signal output from the image processor 120 and outputting the synthesized OSD text signal to the CRT 140. The 160 extracts the character information in the broadcast signal, performs necessary processing, and outputs it to the CRT 140. In this case, the character detection unit 160 adjusts the size of the character according to a control signal of a microprocessor (not shown), and outputs the character. In the case where it is determined that the subtitle exists in the image currently received by the microprocessor 40 It works only.

Also. The KBPS decoder 170 extracts data added to the broadcast signal received from the tuner 50 and outputs the data to the microprocessor 40.

The KBPS decoder 170 is a component that decodes a KBPS signal, which is one of broadcast systems providing an extended data service. In addition, KBPS digitally records data for broadcast programs and scheduled recording, such as channels, program genres (eg, news, drama, sports, etc.), broadcast start / end times, audience ratings, and standard time data on broadcast signals. By converting the signal into an arbitrary horizontal line during the vertical blanking interval (VBI), the signal is decoded by a KBPS decoder on the image receiving device side to perform a broadcast program reservation recording function, and the like. To help.

Next, a description will be given in detail with reference to the flowchart of FIG. 3 attached to a caption resizing process in a television according to a preferred embodiment of the present invention in a television having the above-described configuration.

In step S101, the microprocessor 40 reads the broadcast information in the broadcast program currently received through the KBPS decoder 170. In step S102, it is determined whether there is a subtitle based on the information read in step S101. If it is determined that there is no subtitle, the flow advances to step S103 to determine whether a request for a text mode exists from the user.

If it is determined in step S103 that a request for a text mode exists from the user, the flow advances to step S104 to perform a function of detecting a text character through the character detecting unit 160, and in step S105 the text detected with a normal text character size. Will display the characters.

If it is determined in step S102 that the subtitle exists based on the information read in step S101, the flow proceeds to step S106 to determine whether a request for a text mode exists from the user. If it is determined in step S106 that a request for a text mode exists from the user, the flow proceeds to step S107 to perform a function of detecting a text character through the character detector 160.

In this case, the character detection unit 160 reduces the text characters detected by the microprocessor 40 under the control of the microprocessor 40 through the process of step S108, and displays the text characters reduced in the step S108 in step S109. .

By providing a method of reducing the size of a text character of a television according to the present invention operating as described above, it is possible to solve the problem that the viewer does not correctly recognize the subtitle by overlapping the subtitle and text characters.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (1)

In a television capable of receiving a broadcast signal of a broadcast system that provides an extended data service, A first step of determining whether a subtitle exists in a program currently received from information added to the broadcast signal; A second step of determining whether reception of a text text broadcast is determined by a user when it is determined that the subtitle is present through the first process; And And a third step of reducing and displaying the size of the text characters after the detection of the received text characters, if it is determined that the reception of the text characters broadcast is determined through the second step.