KR970001498Y1 - Zooming apparatus of caption display on tv screen - Google Patents

Abstract

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Description

TV subtitle zoom device

1 is a block diagram according to a conventional circuit.

2 is a block diagram of an enlarged / reduced device of a TV subtitle of the present invention.

* Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 1: Remote control key / button means 10: First analogue / digital converter

20: frame memory 30: first digital / analog converter

40: second analog / digital converter 50: memory

51: actual memory 60: second digital / analog converter

70: Mixing unit (MIX) 80: Controller

100: micom

The present invention relates to an apparatus for enlarging / reducing a TV subtitle in a TV having a caption function, and in particular, a user can watch a lively broadcast by enlarging or reducing subtitles displayed on the screen as a user when watching a conversational or educational broadcast. .

In general, a TV with a caption function is transmitted in a video signal so that a broadcast station can perform a conversation broadcast and an education broadcast as shown in FIG. 1. The transmitted video signal passes through an IF terminal through a TV antenna. It is then input simultaneously to the video stage V1 and the video stage V2.

A first analog / digital converter 10 for converting an analog image signal input from the video terminal V1 into digital data, a frame memory 20 for storing digitally converted data, and the frame memory 20 A first digital / analog converter 30 for converting stored data into an analog signal, a second analog / digital converter 40 for converting a signal extracted from the video terminal V2 into a digital signal, and digitally converted data And a signal output from the first digital / analog converter 30 and the second digital / analog converter 60 for converting data stored in the memory 50 into an analog signal. The mixing unit 70 combines the subtitle signals output from the second digital / analog converter 60.

In this way, the video signal input as the analog signal from the video terminal V1 is converted into digital and stored in the frame memory 20, and the first digital / analog converting unit 30 displays the digitalized video signal in TV viewing. The caption signal, which is converted into an analog signal and input to the mixing unit 70 and input as an analog signal at the video terminal V2, is converted into digital by the second analog / digital conversion unit 40. 50), and the digitalized subtitle signal is converted into an analog signal by the second digital / analog unit and input to the mixing unit 70.

At this time, the video signal inputted from the mixing unit 70 and the caption signal are synthesized and output to the CV stage, and the caption inputted on the video signal is displayed at a constant size on the bottom of the TV screen as it is.

Therefore, a problem arises in that a TV with a small size displayed on a TV screen or a viewer with low vision is difficult to read the contents of a subtitle.

In order to solve the problem of difficult to read the contents of the subtitles, in order to solve the problem close to the TV monitor also provides a cause of physical illness due to electromagnetic waves generated in the TV monitor.

The present invention has been made to solve the conventional problems, and a TV subtitle enlargement / reduction device for viewing a lively broadcast by expanding or reducing the subtitles displayed on the screen at the user's discretion when watching conversation and education broadcasts. The purpose is to provide.

In order to achieve the above object, the present invention provides a TV having a caption function including a first analog / digital converter frame memory, a first digital / analog converter, a second analog / digital converter, a second digital analog converter, and a mixing unit. A second analog / digital conversion unit based on a micom, a vertical, a synchronization signal and a horizontal synchronization signal, and a selection signal output from the micom, for outputting a selection signal received from a remote controller key / button means; And a controller for outputting a control signal to the second digital / analog converter, a setting memory, and means for storing data converted into digital data in the second analog / digital converter by a control signal output from the controller. It consists of a setting memory with a storage means to allow users to enlarge / reduce the subtitles of the TV arbitrarily. There is a characteristic.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of an enlarged / reduced device of a TV subtitle according to the present invention, the first analog / digital converter 10 for converting an analog video signal input from the video terminal V1 into digital data, which is converted into digital data. The caption signal extracted from the frame memory 20 for storing data by the control signal, the first digital / analog converter 30 for converting the data stored in the frame memory 20 into an analog signal, and the video terminal V2 is used. Output from the second analog / digital converter 40 for digital conversion, the second digital / analog converter 60 for converting the digital data stored in the memory into an analog signal, and the first digital / analog converter 30 In the TV with a caption function composed of a mixing unit 70 for synthesizing the received signal and the subtitle signal output from the second digital / analog converting unit 60, the setting received from the remote control key / button means 1 A second analog / digital conversion based on a microcomputer 100 for outputting a selection signal having a range / setting, a vertical synchronization signal HS and a horizontal synchronization signal VS, and a selection signal output from the microcomputer 100; The digital signal is output from the controller 40, the second digital / analog converter 60, the controller 80 that outputs control signals J, K, and L to a setting memory, and the second analog / digital converter 40. And a setting memory 51 having means for storing the data converted into the til by the control signal K output from the controller 80 and a setting range storing means.

FIG. 2 is an embodiment according to the present invention. In general, when a picture broadcast and an education broadcast transmitted from a broadcasting station are performed, a caption is output at a lower portion of a TV screen having a caption function.

The caption function allows a viewer to listen to some of the signals received from the TV antenna, and extracts and displays characters included in the video signal at the bottom of another video screen.

Referring to the operation description, the microcomputer 100 receives the enlargement / reduction setting signal and the setting range signal of the screen caption output from the remote device / button 1 and outputs it to the controller 80.

In other words, if the zoom caption of the screen caption is not operated, the operation according to the conventional configuration is performed. On the contrary, if the zoom caption of the screen caption is operated, the setting range is set using the remote device / button (1). If specified, it is as follows.

As in normal operation, the video signal input through the IF terminal of the TV is simultaneously input to the video terminal V1 and the video terminal V2.

That is, the analog video signal (ie: video screen) output from the video terminal V1 is converted into a digital video signal (ie: video screen) by the first analog / digital converter 10, and then is converted into the frame memory 20. Save it.

The data stored in the frame memory 20 is converted into an analog signal through the first digital / analog converter 30 and then output to the mixing unit 70.

Hereinafter, the second analog / digital converter 40 outputs the caption signal extracted from the analog video signal (ie: video screen) output from the video terminal V2 by the control signal J output from the controller 80. Convert to digital.

The controller 80 temporarily stores the set range (or standard) by using the vertical synchronizing signal HS and the horizontal synchronizing signal VS of the input image signal, and counts the horizontal sync in the first frame to be within the set range. If it is determined that the video signal is being input, the video signal is input to the second analog / digital converter 40 to convert the data into digital and then stored in the setting memory 51.

The above process is performed until the video signal is input within the set range.

When the video signal enters the extended range in the next frame, the data of the previous frame already input to the memory is output and reconverted into digital data by the second digital / analog converter 60, and the first digital / It mixes with the current video signal output from the analog converter 30.

The magnification or output speed of the set area is also related to the speed of reading the data from the memory.

As such, the present invention has an effect of allowing a user to easily watch a live broadcast or a small character by enlarging or reducing the set area.

Claims (1)

(Correction) The first analog / digital converter 10, the frame memory 20, the first digital / analog converter 30, the second analog / digital converter 40, and the second digital / analog converter ( 60), a TV having a caption function composed of a mixing unit 70, a microcomputer 100 for outputting a selection signal of a setting range / with or without a setting received from the remote control key / button means 1, a vertical synchronization signal (HS) And the second analog / digital converter 40, the second digital / analog converter 60, and the setting memory based on the selection signal output from the horizontal synchronization signal VS and the microcomputer 100. The controller 80 outputs the signals J, K, and L, and the data converted into digital data by the second analog / digital converter 40 are stored by the control signal K output from the controller 80. Enlargement of the TV subtitles, characterized in that it comprises a setting memory (51) having a means for storing and a setting range storing means. / Reduction device.