KR19980085739A - OSD display method for caption display on TV - Google Patents

Abstract

The present invention relates to a method of displaying an OSD character during caption display. In particular, the present invention relates to a method of displaying an OSD character in a caption display. A second step of setting a position vector for moving an arbitrary region to a preset position; a third step of determining whether a specific function for displaying an OSD character is input when performing a caption function; and in the third step, an OSD If it is determined that display of a character is necessary, the fourth step of moving the area set in the first step according to the position vector set in the second step, and the third step in the area moved through the fourth step A caption table of a television comprising a fifth step of displaying an OSD character that is determined to be necessary for display; Providing an OSD display method for the hour, if the volume related key is operated during caption display, the relevant operation is performed while the OSD display function is shifted from the original position upward or to a specific position to maintain the caption display as it is. OSD text display is possible.

Description

OSD display method for caption display on TV

The present invention relates to a display method of OSD characters during caption display. In particular, when a volume related key is manipulated during caption display, the related operation is performed while the OSD display function is moved upward or from a specific position. The present invention relates to an OSD display method for displaying a caption of a television which is shifted to maintain the caption display.

A typical television receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs the demodulated signal as a video signal and an audio signal through a CRT and a speaker. A caption display function exists in such a general TV, and a configuration and function of a general TV having a caption function as described above will be described with reference to FIG. 1.

In Fig. 1, reference numeral 1 denotes an antenna, 2 denotes an RF amplifying unit for amplifying a radio frequency (hereinafter referred to as RF) signal received through the antenna 1, and 3 denotes the RF amplifying unit ( A first mixer for mixing the radio frequency signal output from 2) and the oscillation frequency signal output from the local oscillation circuit 17 to be described later and outputting an intermediate frequency signal (hereinafter referred to as IF) is shown.

Further, reference numeral 4 denotes an IF amplifier section for amplifying the intermediate frequency signal output from the first mixer 3, and 5 denotes an image intermediate frequency signal PIF in the intermediate frequency signal output from the IF amplifier section 4. And a P / S separator for separating the voice intermediate frequency signal SIF, and 6 represents a voice detector for detecting a voice signal from the voice intermediate frequency signal SIF output from the P / S separator 5. 7 denotes an image detector for detecting an image signal from an image intermediate frequency signal PIF output from the P / S separator 5.

In addition, reference numeral 8 denotes a remote control device that allows a viewer to select a desired channel or to select each mode of the television, that is, a TV / AV mode, and 9 denotes an infrared signal from the remote control device 8. 10 shows a receiver for converting a conventional code signal, 10 denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor which controls the entire system in accordance with an input signal from the remote controller device 8.

In addition, reference numeral 12 denotes a screen display for overlapping and outputting a character or a picture on a screen on which a broadcast signal is output separately from the broadcast signal according to the control signal of the microprocessor 11 (On Screen Display). (Hereinafter referred to as OSD), and 13 denotes a PWM generator for generating a predetermined pulse width modulation (PWM) signal according to a control signal from the microprocessor 11, and 14 denotes the above. An integration circuit for integrating the PWM signal output from the PWM generator 13 to generate a predetermined level signal is shown.

In this case, when the viewer selects a predetermined channel using the remote controller device 8, the microprocessor 11 reads out channel data corresponding to the channel selected by the viewer from the channel memory 10 and then based on the selected channel. By controlling the PWM generator 13 to generate a predetermined PWM signal, the PWM signal is output as a voltage control signal corresponding to the channel selected by the viewer through the integrator circuit 14.

In addition, reference numeral 15 is provided for a precise tuning operation, and represents an Auto Fine Tunning circuit (hereinafter referred to as AFT) circuit 15, and 16 represents a voltage signal applied from the integrating circuit 14; An adder for adding a voltage signal applied from the AFT circuit 15 is shown, and 17 represents a local oscillating circuit for outputting a predetermined oscillation frequency.

In addition, reference numeral 18 controls the amplification degree of the above-described RF amplifier 102 and the IF amplifier 4 on the basis of the level of the image signal detected by the image detector 7, the image detector ( Figure 7 shows the Automatic Gain Control (AGC) circuit that controls the video signal output level from 7).

On the other hand, reference numeral 19 denotes an external AV device such as a VCR or a laser disc player, and 20 denotes the voice detector 6 and the image detector 7 according to the switching signal from the microprocessor 11 described above. A first switching section for selectively outputting audio and video signals from and external audio and video signals from the external AV device 19 is shown.

Although reference numeral 23 is not shown for the image signal output from the first switching unit 20, the color, tint, and brightness are in accordance with the control signal from the microprocessor 11. A video processing unit which processes (Brightness) and the like and outputs R (Red), G (Green), and B (Blue) signals corresponding to the video signal.

The RGB signal output from the image processor 23 is output by mixing RGB and OSD blanking signals Y ′, which are output signals of the OSD generator 12 described above, in the second mixer indicated by reference numeral 24. Reference numeral 25 denotes a CRT driving unit for driving the CRT based on the RGB signal output from the mixer 24.

In addition, reference numeral 21 denotes a base, treble, and volume according to a control signal from the microprocessor 11 although not shown for the voice signal output from the first switching unit 20. A voice processing unit for executing voice processing such as a volume), and 22 denotes a voice amplifying unit for amplifying and outputting the voice signal processed by the voice processing unit 21 to a speaker.

In the general TV configured as described above, when the viewer selects the TV / AV mode by using the remote controller 8, the microprocessor 11 controls the switching unit 20 to control the voice detector 6. And by selectively outputting the video and audio signals from the video detector 7 or the video and audio signals from the external AV device 19 to the video processor 23 and the audio processor 21. Can watch the video and audio through the CRT and speakers of the TV.

In the TV operating as described above, in the conventional caption display control method, when the user selects the caption mode, the microcomputer enables the caption operation, and simultaneously extracts the caption signal (subtitle signal) from the caption broadcast signal obtained from the broadcasting station, The on-screen display is controlled to allow caption display.

If the TV on screen is displayed through the remote control or the key input device while performing the caption display as described above, the caption on screen display is turned off, the TV on screen display is operated to display the corresponding state, and when the set time elapses, Turn off the TV on screen and enable the caption on screen to control the caption display again.

However, the conventional caption-on-screen control method as described above frequently turns off the caption-on-screen and enables the TV-on-screen when the remote control or key input device is operated during the caption-on-screen. On / off of the caption on screen is repeated, there is a problem that the viewer does not properly understand the caption content.

In particular, when the TV on screen is displayed during the caption on screen, the caption on screen state is restored again after a predetermined time, so that the caption contents are not understood in the meantime. It will not be possible.

An object of the present invention for solving the problems described above is to shift the OSD display function from the original position upward or to a specific position while performing the relevant operation when the volume related key is operated during the caption display. The present invention provides an OSD display method for displaying a caption of a television for maintaining it as it is.

1 is a block diagram of a general television system;

2 is a flowchart showing an OSD display method for caption display of a television according to the present invention.

Figure 3a and Figure 3b is an example of the display state of the OSD character in accordance with the present invention

A feature of the present invention for achieving the above object is a first step of setting the display area of the OSD character on the basis of the horizontal / vertical synchronizing signal, and the predetermined position of any region set on the basis of the horizontal / vertical synchronizing signal A second step of setting a position vector for moving to a third step; a third step of determining whether a specific function for displaying an OSD character is input when the caption function is performed; and determining that the display of the OSD character is necessary in the third step. And the fourth step of shifting the area set in the first step according to the position vector set in the second step, and the OSD determined to be necessary in the third step in the area moved through the fourth step. And a fifth step of displaying characters.

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

2 is a flowchart illustrating a caption display control method of a television according to the present invention, and FIGS. 3A and 3B are exemplary views of display states of OSD characters according to the present invention.

A control scheme according to the present invention shown in FIG. 2 will be described with reference to FIGS. 3A and 3B.

When the normal operation mode, i.e., the caption function is not performed, the OSD text is displayed in the area A shown in FIG. 3A. In step S101, it is determined whether the caption function is being performed, and the caption displayed by the caption function is performed. Characters are displayed in area A shown in Fig. 3A.

If it is determined in step S101 that the caption function is being performed, the process proceeds to step S102 where a request signal for performing a specific function is input from the user to determine whether an operation for displaying an OSD character is necessary. If it is determined in step S102 that an operation for displaying the OSD text is necessary, the flow advances to step S103 to set a position for displaying the OSD text. At this time, the position for displaying the OSD text is changed according to a preset pattern of the horizontal vertical synchronization signal according to the coordinates for overlapping the original image.

Subsequently, in step S104, the corresponding OSD text is displayed at the position according to the coordinates changed in step S103. An example of the display area on the screen in that case is shown in FIG. 3B.

When the OSD display method for caption display of a television according to the present invention operates as described above, if a volume related key is manipulated during caption display, the associated operation is performed while the OSD display function is raised or lowered from its original position. Shifting to a specific position allows the display of OSD text while maintaining the caption display.

Claims (1)

A first step of setting a display area of an OSD character based on a horizontal / vertical synchronization signal; A second step of setting a position vector for moving an arbitrary region set on the basis of the horizontal / vertical synchronization signal to a preset position; A third step of determining whether a specific function for displaying an OSD character is input when the caption function is performed; A fourth step of moving the area set in the first step according to the position vector set in the second step if it is determined that display of the OSD text is necessary in the third step; And And a fifth step of displaying an OSD character determined to be necessary in the third step in an area moved through the fourth step.