KR19990012793U - Screen compensator for wide broadcast reception on televisions with 4: 3 aspect ratio - Google Patents

Abstract

In the present invention, when a wide broadcasting reception is performed on a television having a 4: 3 aspect ratio, the television has a 4: 3 aspect ratio that corrects the vertical scan signal in a panorama format so that an image having the same shape as the original signal is output from the center of the screen. The present invention relates to a screen compensator for wide broadcast reception, comprising a vertical / horizontal deflection unit (26, 30) for outputting a vertical / horizontal deflection signal for deflecting a video signal processed on a CRT based on a vertical / horizontal scan signal. In 4: 3 television; A synchronization signal detector 22 for detecting a vertical / horizontal synchronization signal included in the broadcast signal; A control unit 12 for outputting the vertical scan signal corrected based on the vertical / horizontal synchronization signal to the vertical deflection unit 26 when the wide mode is set by the control signal input unit 10; A vertical scan compensator for embedding a scan signal according to a 4: 3 broadcast mode and a corrected scan signal according to a wide broadcast mode to output a specific vertical scan signal to the vertical deflector 26 under the control of the controller 12. (24), wherein the vertical scan signal has a steep slope between the beginning and the end of the vertical scan cycle, and the slope of the middle portion of the vertical scan cycle is corrected by a gentle waveform. It is characterized by.

Description

Screen compensator for wide broadcast reception on televisions with 4: 3 aspect ratio

The present invention relates to a screen correction apparatus for receiving a wide broadcast on a television having a 4: 3 aspect ratio, and more particularly, when a wide broadcasting reception is performed on a television having a 4: 3 aspect ratio, a vertical scan signal is corrected in a panorama format to correct the television. The present invention relates to a screen correction apparatus for wide broadcast reception in a television having a 4: 3 aspect ratio in which an image having the same shape as the original signal is output from the center of the screen.

As is well known, a video signal and an audio signal of a broadcast program transmitted from a broadcasting station via a wired or wireless channel are reproduced, or a video signal and an audio signal read by the video software by, for example, a video tape recorder or an optical disc playback system are reproduced. In the case of television, a so-called 'wide vision' has been developed in which a wide range of images can be displayed from a 4: 3 aspect ratio to a 16: 9 aspect ratio, for example, in order to increase the viewing feeling.

In addition, a wide 4: 3 aspect ratio television is added with a wide function. When a user sets the corresponding wide function, the number of vertical lines is the same as that of a 4: 3 signal so that a 16: 9 signal transmitted from a broadcasting station can be reproduced on a CRT screen. Since the horizontal time axis is compressed so that it falls within the effective horizontal time (26.46㎲), the screen is composed of a video signal output in the center with a blanking area at the top and bottom of the CRT screen. At this time, the video signal output to the center portion of the CRT has a shape that extends in the horizontal direction.

That is, when a 16: 9 signal transmitted from a broadcasting station is received and reproduced through wide vision, a circular image is output in the center of the corresponding CRT as shown in FIG. 3A, but the 16: 9 signal is normal. When received through 4: 3 television, as shown in FIG. 3B, blanking areas are formed at upper and lower ends, and horizontal deflection is adjusted so that the circle located at the center is output as an ellipse in the form of a transverse direction.

On the other hand, when the wide function is set in a general 4: 3 television, a technique of adjusting horizontal deflection is used to remove the blanking area generated at the top and bottom of the CRT. In the case of reproducing and outputting 9 signals, as shown in FIG. 3C, the circle outputted on the CRT is stretched in the longitudinal direction again.

Therefore, even in the improved 4: 3 television, when a user watches a wide broadcast of 16: 9 signal via 4: 3 television, a 16: 9 signal does not output the same shape as that of a video reproduced in wide vision. It is difficult to expect the same viewing effect as watched through wide vision.

Accordingly, the present invention has been devised in view of the above circumstances, and when a wide broadcast reception is performed on a television having a 4: 3 aspect ratio, the vertical scan signal is corrected in a panoramic format so that an image having the same shape as the original signal in the center of the screen of the television is provided. It is an object of the present invention to provide a screen correction apparatus for receiving a wide broadcast in a television having a 4: 3 aspect ratio for outputting the same.

According to an embodiment of the present invention for realizing the above object, 4 is provided with a vertical / horizontal deflection portion for outputting a vertical / horizontal deflection signal for deflecting the image signal processed on the CRT based on the vertical / horizontal scan signal : For 3 televisions; A synchronization signal detector for detecting a vertical / horizontal synchronization signal included in the broadcast signal; A controller configured to output a vertical scan signal corrected based on the vertical / horizontal synchronization signal to the vertical deflection unit when a wide mode is set by a control signal input unit; A scan signal according to a 4: 3 broadcast mode and a scan signal in a corrected form according to the wide broadcast mode are embedded to output a specific vertical scan signal to the vertical deflection unit under the control of the controller, The vertical scan signal is wide in a television having a 4: 3 aspect ratio in which the inclination of the initial and end of the vertical scanning period is steep and the inclination of the middle portion of the vertical scanning period is corrected by a gentle waveform. A screen correction device is provided when receiving a broadcast.

According to the present invention having the above-described configuration, when a 16: 9 screen is played back in a 4: 3 television, the horizontal and vertical deflections are adjusted so that an undistorted image is output from the center portion of the CRT so that the user can display the 4: 3 television. When watching a wide broadcast by using it can improve the satisfaction.

1 is a block diagram illustrating a main block configuration of a screen correction apparatus when receiving a wide broadcast in a television having a 4: 3 aspect ratio according to an embodiment of the present invention;

FIG. 2 is a waveform diagram of a scan signal output from the vertical scan compensator 24 shown in FIG. 1;

3A is a diagram illustrating a screen display example in wide vision;

3B to 3C are diagrams showing examples of screen display at the time of wide broadcast reception in a television having a conventional 4: 3 aspect ratio;

3D is a view showing a screen display example of receiving a wide broadcast in a television having a 4: 3 aspect ratio according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: control signal input unit, 12: control unit,

14: tuner, 16: PIF module,

18: video signal processor, 20: video amplifier,

22: synchronous signal detection unit, 24: vertical scan assistant,

26: vertical deflection, 28: horizontal scandal,

30: horizontal deflection portion.

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

1 is a block diagram illustrating a main block configuration of a screen correction apparatus when receiving a wide broadcast in a television having a 4: 3 aspect ratio according to an embodiment of the present invention. In FIG. 10, reference numeral 10 denotes a plurality of buttons on a main body of the television. Control signal consisting of a control panel or a remote control for remote control of the television to set a function provided in the television, the control signal input unit 10 in the present invention for outputting a 16: 9 signal to the control signal input unit 10 A wide button 10a for setting a wide mode is provided.

Reference numeral 12 denotes a control unit for controlling the entire apparatus of the television based on the control signal input from the control signal input unit 10. In the present invention, the control unit 12 is connected to the control signal input unit 10. When the wide mode is set by the vertical scan correction unit 24, which will be described later, the vertical deflection signal applied to the CRT is corrected to control a series of devices so that the image output on the screen is not distorted.

Reference numeral 14 denotes a tuner for tuning a specific channel among a plurality of channels received through an antenna under the control of the controller 12, and 16 denotes a video signal of a broadcast signal of a channel tuned by the tuner 14; A PIF module for performing IF conversion processing, 18 is a video signal processing unit for reproducing a video signal from the PIF 16 and outputting an R / G / B signal accordingly, and 20 is the video signal processing unit 18 R / G / B signals are amplified by the amplification process so that they can be reproduced and output through the CRT.

In addition, reference numeral 22 in the drawing denotes a synchronization signal detector for detecting a horizontal / vertical synchronization signal from an image signal output from the PIF module 22 and applying the detected horizontal / vertical synchronization signal to the controller 12. 24 is a vertical scan compensator which incorporates a vertical scan signal applied in the 4: 3 broadcast mode and a vertical scan signal applied in the wide mode and outputs a predetermined vertical scan signal under the control of the control unit 12. A vertical deflection unit generates a vertical deflection signal based on the vertical scan signal from the vertical scan compensator 24 and applies the vertical deflection signal to the CRT.

Reference numeral 28 denotes a horizontal scan compensator which incorporates a horizontal scan signal applied in the 4: 3 broadcast mode and a horizontal scan signal applied in the wide mode, and outputs a predetermined horizontal scan signal under the control of the controller 12. 30 is a horizontal deflection unit that generates a horizontal deflection signal based on the horizontal scan signal from the horizontal scan correction unit 28 and applies the horizontal deflection signal to the CRT.

Next, the operation of the screen correction apparatus when receiving a wide broadcast in a television having a 4: 3 aspect ratio according to an embodiment of the present invention having the above-described configuration will be described in detail.

First, the control unit 12 applies a predetermined tuning voltage to the tuner 14 based on the channel tuning signal input from the control signal input unit 10 so that a specific channel is tuned by the tuner 14. The broadcast signal of the channel tuned by the tuner 14 is applied to the PIF module 16 and subjected to IF conversion processing. Only the next video signal is detected and applied to the video signal processing unit 18 connected to the rear stage.

Accordingly, the image signal processor 18 reproduces the corresponding video signal to generate an R / G / B signal, and the image amplifier 20 amplifies the corresponding R / G / B signal to the CRT image. To play a predetermined video.

At the same time, the control unit 12 applies a predetermined control signal to the vertical scan compensator 24 and the horizontal scan compensator 28 so that 4: 3 broadcast is performed on the vertical scan compensator 24 and the horizontal scan compensator 28. The vertical / horizontal scan signal is outputted according to the mode. In this case, the waveform of the vertical scan signal outputted by the vertical scan compensator 24 is as shown in FIG. 2A. Subsequently, the vertical / horizontal deflection units 26 and 28 generate a predetermined vertical / horizontal deflection signal based on the vertical / horizontal scan signal and apply it to the CRT to reproduce a predetermined image on the CRT screen.

In this state, when the wide button 10a of the control signal input unit 10 is operated so that the button signal corresponding thereto is applied to the control unit 12, the control unit 12 is applied from the synchronization signal detection unit 22. Based on the vertical / horizontal synchronization signal, the vertical scan compensator 24 and the horizontal scan compensator 28 output a vertical / horizontal scan signal according to a wide mode, wherein the vertical scan compensator 24 outputs the vertical scan compensator. The waveform of the scan signal is as shown in FIG. 2B. Subsequently, the vertical / horizontal deflection units 26 and 28 generate a predetermined vertical / horizontal deflection signal based on the vertical / horizontal scan signal and apply it to the CRT to reproduce a predetermined image on the CRT screen.

On the other hand, according to the vertical scan signal output from the vertical scan compensator 24 shown in FIG. 2, the inclination of the scan signal is steep at the beginning of the vertical scan period and at the end of the vertical scan. In the middle of the vertical scanning cycle, the scan signal is gradually inclined and the scan player is roughened. The image of the center portion of the CRT screen is displayed in wide vision as shown in FIG. 3D. Has the same shape as in the regeneration process.

Therefore, when a wide mode is set in a television having a 4: 3 aspect ratio and a playback process for a 16: 9 signal is performed, the scanning players in the left, middle, and right portions of the CRT screen are differentiated, and the panoramic image is displayed on the CRT screen. In other words, the left and right images of the CRT screen appear to extend in the longitudinal direction as the scanning player tightens, but the same image as in the wide vision is output to the center portion.

As described above, according to the screen correction apparatus for receiving a wide broadcast in a television having a 4: 3 aspect ratio according to an embodiment of the present invention, when a wide broadcast is received in a 4: 3 television, an image output to a CRT screen is corrected. As a result of the panorama output, the viewer's satisfaction can be improved.

Claims (1)

A 4: 3 television comprising a vertical / horizontal deflection portion 26,30 for outputting a vertical / horizontal deflection signal for deflecting a video signal processed on a CRT based on the vertical / horizontal scan signal; A synchronization signal detector 22 for detecting a vertical / horizontal synchronization signal included in the broadcast signal; A control unit 12 for outputting the vertical scan signal corrected based on the vertical / horizontal synchronization signal to the vertical deflection unit 26 when the wide mode is set by the control signal input unit 10; A vertical scan compensator for embedding a scan signal according to a 4: 3 broadcast mode and a corrected scan signal according to a wide broadcast mode to output a specific vertical scan signal to the vertical deflector 26 under the control of the controller 12. Composed of 24, The vertical scan signal has a 4: 3 aspect ratio characterized by a steep slope between the beginning and the end of the vertical scan cycle and a slope of the middle portion of the vertical scan cycle corrected by a gentle waveform. Screen correction device for receiving wide broadcasts on a television.