KR19990026719A - Subtitle Display Device of Wide TV - Google Patents

Abstract

The present invention relates to a method of displaying a subtitle signal of a 4: 3 television on a 16: 9 television, and more particularly, to display a subtitle signal transmitted and included in a video screen of a 4: 3 television broadcast on a 16: 9 screen. The present invention relates to a subtitle display apparatus of a wide television for preventing a nonlinearity of subtitles generated in a case and displaying subtitles in a normal state.

The wide-screen caption display device of the present invention includes a tuner 10 for selecting a specific broadcast station signal from a signal transmitted from a broadcast station, and a video processor for processing a signal output from the tuner 10 and outputting a video signal ( 12) and a 16: 9 display television including a microcomputer 14 for controlling the whole stroke, comprising: an A / D converter 16 for modulating a video signal output from the video processor 12 into a digital signal; A storage unit 18 for storing the digital signal modulated by the A / D converter 16; Subtitle recognition and separation unit 20 for detecting a subtitle from the digital signal stored in the storage unit 18 and to separate the subtitle from the screen; An image storage unit 22 for storing image data in which subtitles are separated from the subtitle recognition and separation unit 20; A subtitle converter 24 for converting subtitles separated from the subtitle recognition and separation unit 20 into equally spaced characters of the same size; A subtitle storage unit 26 for storing subtitle image data converted by the subtitle converter 24; And a mixer 28 for mixing the image data from the image storage unit 22 and the subtitle image data from the subtitle storage unit 26; And a D / A converter 30 for modulating the mixed video signal output from the mixer 28 into an analog signal and outputting it to the CRT 34.

Description

Subtitle Display Device of Wide TV

The present invention relates to a method of displaying a subtitle signal of a 4: 3 television on a 16: 9 television, and more particularly, to display a subtitle signal transmitted and included in a video screen of a 4: 3 television broadcast on a 16: 9 screen. The present invention relates to a subtitle display apparatus of a wide television for preventing a nonlinearity of subtitles generated in a case and displaying subtitles in a normal state.

Due to the development of television technology, televisions having a 16: 9 aspect ratio have been sold that can provide a clearer and wider screen than conventional 4: 3 aspect ratio televisions. Wide-screen TVs are expensive and are not yet popularized because they require a wide-screen function to be transmitted to and receive wide-screen signals from broadcast stations in order to watch them on a 16: 9 screen.

When a general television signal having a 4: 3 ratio is input to such a wide television, a video signal is normally output to some extent because the screen is adjusted using an internal circuit, but subtitle characters included in the input signal are not normally output. .

Fig. 2 is a front view of the television 40 showing a state in which subtitles included in 4: 3 television broadcasting are displayed on a wide television (having a 16: 9 screen). As shown in the figure, the characters in the center of the screen are normally output, but the larger the toward both ends, it can be seen that the output is abnormal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a non-linear subtitle generated when a subtitle signal transmitted and included in a 4: 3 television broadcast is displayed on a 16: 9 screen. The present invention provides a caption display device of a wide television for preventing a mold and displaying captions in a normal state.

The wide-screen caption display device of the present invention for achieving the above object comprises a tuner 10 for tuning a specific broadcast station signal among signals transmitted from a broadcast station, and a signal output from the tuner 10 for processing a video signal. In a 16: 9 display television comprising a video processor 12 for output and a microcomputer 14 for controlling the whole stroke, A / A for modulating a video signal output from the video processor 12 into a digital signal D converter 16; A storage unit 18 for storing the digital signal modulated by the A / D converter 16; Subtitle recognition and separation unit 20 for detecting a subtitle from the digital signal stored in the storage unit 18 and to separate the subtitle from the screen; An image storage unit 22 for storing image data in which subtitles are separated from the subtitle recognition and separation unit 20; A subtitle converter 24 for converting subtitles separated from the subtitle recognition and separation unit 20 into equally spaced characters of the same size; A subtitle storage unit 26 for storing subtitle image data converted by the subtitle converter 24; And a mixer 28 for mixing the image data from the image storage unit 22 and the subtitle image data from the subtitle storage unit 26; And a D / A converter 30 for modulating the mixed video signal output from the mixer 28 into an analog signal and outputting it to the CRT 34.

1 is a block diagram of a caption display apparatus for a wide television according to the present invention;

2 is a front view showing a state where a subtitle of a conventional 4: 3 broadcast is displayed on a wide television;

Fig. 3 is a flowchart for showing an operating state of the caption display device of the wide television of the present invention.

* Explanation of symbols for main parts of the drawings

10: tuner, 12: video processor,

14: microcomputer, 16: A / D converter,

18: storage unit, 20: caption recognition and separation unit,

22: video storage, 24: subtitle converter,

26: subtitle storage, 28: mixer,

30: D / A converter, 32: video amplifier,

34: CRT, 40: TV,

42: Subtitles.

Hereinafter, a caption display device of a wide television according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention is a device for displaying subtitles having normal sizes and equal intervals by removing distortion of subtitles generated when a 4: 3 television broadcast signal is output on a wide television.

1 is a schematic configuration diagram of a television including a caption display apparatus of a wide television of the present invention. As shown, an A / D converter 16 for modulating a video signal output from the video processor 12 into a digital signal in a conventional wide television, and the digital signal modulated by the A / D converter 16 A storage unit 18 for storing, a caption recognition and separation unit 20 for detecting a caption from a digital signal stored in the storage unit 18 and separating the caption from the screen, and the caption recognition and separation unit 20 A video storage unit 22 for storing video data from which subtitles are separated from the subtitles, and a subtitle converter 24 for converting subtitles separated from the subtitle recognition and separation unit 20 into equal-spaced characters of the same size; A subtitle storage unit 26 for storing the subtitle image data converted by the subtitle converter 24, the image data from the image storage unit 22, and the subtitle image data from the subtitle storage unit 26; Mixer 28 for mixing with the mixer It can be seen that the D / A converter 30 is further included to modulate the mixed video signal output from the 28 into an analog signal and output the same to the CRT 34. Hereinafter, an operation state will be described with reference to the flowchart of FIG. 3.

The broadcast signal propagated through the air as a radio signal is tuned by the tuner 10, and the tuned specific broadcast signal is modulated into an analog signal by the video processor 12 and output.

The output analog signal is converted into a digital signal by the A / D converter 14. The microcomputer 14 determines whether the signal input through the tuner 12 is a 4: 3 television broadcast signal. This can be recognized as screen display data included in the wide signal. For convenience of description, the circuit (including the audio output) between the tuner 10 and the video processor 12 is not shown in detail, but this is essentially the same as a conventional television.

When confirmed as a 4: 3 television broadcast signal, the microcomputer 14 modulates an analog signal including image data output through the video processor 12 into a digital signal by the A / D converter 12. The video signal modulated with the digital signal is temporarily stored in the storage unit 18. The storage unit 18 may be configured using a general memory device, and the stored screens are stored one frame at a time.

The stored screen is immediately output to the caption recognition and separation unit 20. The caption recognition and separation unit 20 recognizes a caption portion included in the digital image data and separates it from the image data. As shown in FIG. 2, the separated subtitle part is displayed as a subtitle having a normal shape and increasing in size toward both ends.

The separated subtitle signal is input to the subtitle converter 24, and the subtitle converter 24 modulates the non-linearly outputted subtitles into normal subtitles, that is, subtitle characters having the same size and constant intervals. Is output. The caption characters thus output are temporarily stored in the caption storage 26 and then output to the mixer 28.

On the other hand, the image data from which the caption character is separated by the caption recognition and separation unit 20 is temporarily stored in the image storage unit 22 and then output to the mixer 28.

The microcomputer 14 synchronizes the image data output from the image storage unit 22 and the subtitle storage unit 26 with the subtitle data, synthesizes the same, and outputs the synthesized data to the D / A converter 30. The D / A converter 30 modulates the digital composite video signal into an analog signal and outputs it to the image amplifier 32.

The synthesized video signal amplified to a sufficient magnitude in the image amplifier 32 is finally output through the CRT 34. In this case, the characters displayed on the CRT 34 are different from each other in the same sized characters as in FIG. 2.

As described above, according to the present invention, the subtitles can be displayed in a normal state by preventing the nonlinearity of the subtitles generated when the subtitle signals included in the video screen of the 4: 3 television broadcast are displayed on the 16: 9 screen. There is an advantage.

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 (1)

A tuner 10 for tuning a specific broadcast station signal among signals transmitted from a broadcast station, a video processor 12 for processing a signal output from the tuner 10, and outputting a video signal; In a 16: 9 television comprising 14), An A / D converter 16 for modulating the video signal output from the video processor 12 into a digital signal; A storage unit 18 for storing the digital signal modulated by the A / D converter 16; Subtitle recognition and separation unit 20 for detecting a subtitle from the digital signal stored in the storage unit 18 and to separate the subtitle from the screen; An image storage unit 22 for storing image data in which subtitles are separated from the subtitle recognition and separation unit 20; A subtitle converter 24 for converting subtitles separated from the subtitle recognition and separation unit 20 into equally spaced characters of the same size; A subtitle storage unit 26 for storing subtitle image data converted by the subtitle converter 24; A mixer (28) for mixing the image data from the image storage unit (22) and the subtitle image data from the subtitle storage unit (26); And And a D / A converter (30) for modulating a mixed video signal output from the mixer (28) into an analog signal and outputting the same to a CRT (34).