KR100698211B1 - Display device and method for displaying Video Signal thereof - Google Patents

Abstract

The present invention relates to an image device capable of automatically displaying the format of an image signal in full size on the entire effective screen of the display unit in the absence of aspect ratio information on the input image signal, and a display method thereof. The present invention provides a first step of extending a horizontal size of an input video signal to a horizontal full screen effective size of a display module displaying the video signal when no aspect ratio information is detected in the input video signal. When the vertical size information is detected in the display module and letter box information exists in the vertical direction, the vertical size of the input image signal is extended to the entire effective screen size in the vertical direction of the display module to extend the image signal to the display module. It provides a display method of a video device comprising a second step of displaying. . Therefore, according to the present invention, even when the aspect ratio is not included in the image signal or when the broadcasting station transmits the aspect ratio for the image signal or the aspect ratio information has an error, the image can be displayed in full size.

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Description

Display device and method for displaying video signal

1 is a flowchart illustrating a display method of an image apparatus according to the related art.

2 is a block diagram illustrating a video device according to the present invention.

3 is a flowchart illustrating a display method of an imaging apparatus according to the present invention.

Explanation of symbols for main parts of the drawings

10: video signal input unit 20: video signal processing unit

30: Teletext processing unit 40: Scat signal (ID) processing unit

50: image input signal detection unit 60: output image processing unit

70: control unit 80: display unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video device, and more particularly, to a video device capable of automatically displaying the format of a video signal in full size on the entire effective screen of a display unit when there is no aspect ratio information on an input video signal, and a display method thereof. .

Broadcasting is a mass media that targets an unspecified number, which is advantageous because it can be compressed like computer data compression because all elements (video, audio, data) are treated digitally.

After color TV broadcasting, stereo sound, remote control device, subtitle broadcasting, data broadcasting, etc. have adopted some digital technologies. In the 90's, computer and network technologies have been spreading more rapidly, so that the broadcasting field can realize high-definition and multifunctional TV. Digital TV was pursued as a video device.

In the case of digital TV (hereinafter, DTV), one program of HDTV level and three or more programs of SDTV level can be transmitted to one channel, and digital signal transmission and processing make it possible to enjoy a much cleaner screen. The ghost phenomenon can be solved on its own, and radio waves reflected by obstacles can be solved on their own.

Digital signal processing of digital TV video and audio becomes the same digital data format, and additional data can be added and sent.

For example, multimedia related services such as information related to the program or real time information such as stocks, exchange rates, weather forecasts, and internet information can be enabled.

Recently, DTV has been implemented using LCD, PDP or OLED (ORGANIC LIGHT EMITTING DIODES) modules in cathode ray tube (CRT) or projection TV. Such LCDs, PDPs, and OLEDs have the advantage of being considerably thinner than CRTs or projection methods.

In general, standard TVs with a 4: 3 (or 480I (Interlace)) effective picture have been widely used, but recently, the demand for wide televisions that process input signals of 480P or more is increasing. have. This is because the aspect ratio of the program to be broadcasted (external input broadcast signal) is expected to be mainstream 16: 9, and from the outside, a video signal format of 480P or higher or HD (High Definition) signal formats such as 720P and 1080I If it is input, it is determined that a wide format is input, and the image signal input from the outside is varied and displayed to fit the TV screen size.

Hereinafter, a display method of a video apparatus according to the prior art will be described with reference to the accompanying drawings.

1 is a flowchart illustrating a display method of an image apparatus according to the prior art.

As shown in FIG. 1, when the video signal is input (S10), whether or not broadcast information, for example, a wide screen system (WSS) or a scart identifier, is present in the video signal according to the related art. Determine (S20).

If it is determined that the broadcast information does not exist (S20), the input video signal is set to be displayed in a 4: 3 aspect ratio (screen format).

If it is determined that the broadcast information exists (S20), it is determined whether the information is 16: 9 (S40).

If the determination result (S40), the 16: 9 information is set to the 16: 9 aspect ratio (S50).

If it is determined that the broadcast information is not 16: 9 broadcast information, it is determined whether the broadcast information is 14: 9 information (S60).

If the determination result (S60), 14: 9 information, set the aspect ratio to the 14: 9 aspect ratio (S70).

If it is determined that the broadcast information is not 14: 9 broadcast information, it is determined whether the broadcast information is Zoom information (S80).

As a result of the determination (S80), if the zoom information, the aspect ratio is set to the zoom aspect ratio (S90).

If it is determined that the broadcast information is not zoom information (S80), it is determined whether the information is 4: 3 (S100).

If the determination result (S100), 4: 3 information, the aspect ratio is set to 4: 3 aspect ratio (S110).

The determination result (S100) if the broadcast information is not 4: 3 information is set to display the video signal in the 4: 3 aspect ratio (S30).

The display method of the image apparatus according to the related art described above has the following problems.

First, when the aspect ratio is not included in the video signal or when the broadcasting station transmits a missing aspect ratio or there is an error in the aspect ratio information, there is a problem in that the display unit displays an image at a 4: 3 aspect ratio.

Second, image signals could not be displayed in full size regardless of the size of the display unit.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to automatically display the format of the video signal in full size on the entire effective screen of the display unit when there is no aspect ratio information for the input video signal It is to provide a video device and a display method thereof that can be.

According to an aspect of the present invention, a video signal input unit for receiving a video signal and transmitting the video signal to a video signal processor, a video signal processor for decoding the video signal transmitted from the video signal input unit, and the video signal. An aspect ratio information processing unit for processing aspect ratio information and transmitting the same to the control unit; a vertical information detection unit detecting whether a letter box exists in a vertical image signal from the image signal decoded by the image signal processing unit and transmitting the letter box to the controller; And an output image processing unit for adjusting the vertical and horizontal sizes of the image signals decoded by the image signal processing unit and outputting them to a display unit, the aspect ratio information processing unit, and the information displayed on the effective screen of the display unit according to the information transmitted from the vertical information detection unit. So that the image of the signal can be displayed at full size It provides a video device comprising a control unit for generating a signal for controlling the output image processing unit.

The aspect ratio information processor may include different voltages depending on the aspect ratio of an image input through a telejack processor of the video device and a teletext processor that processes aspect ratio information of a current image from teletext information of the broadcast signal of the video signal. It is preferably composed of one or more of the scat signal processing unit for detecting the aspect ratio information of the input image by using.

The scart signal processing unit is preferably configured as a scart jack.

According to another example of the present invention for achieving the above object, if the aspect ratio information is not detected in the input video signal, the horizontal size of the input video signal to the horizontal full screen effective size of the display module for displaying the video signal A first step of expanding and detecting the vertical size information of the input image signal in the display module and displaying the vertical size of the input image signal in the vertical direction of the display module when there is letter box information in the vertical direction. And a second step of expanding the size to display the video signal on the display module.

Wherein the aspect ratio information is detected in the first step, if the detected aspect ratio information is 16: 9 information, the second step after setting the horizontal effective screen size of the image signal to be displayed to the 16: 9 aspect ratio It is preferable to carry out.

And when the aspect ratio information is detected in the first step and the detected aspect ratio information is 14: 9 information, the horizontal direction overall effective of the display module displaying the image signal as the horizontal effective screen size of the image signal to be displayed. It is preferable to extend the screen size, and set the 14: 9 aspect ratio in the vertical direction, and then perform the second step.

In addition, when the detected aspect ratio information is 14: 9 information, the spectacle mode is applied when the horizontal effective screen size of the video signal to be displayed is extended to the horizontal full screen effective size of the display module displaying the video signal. It is desirable to expand.

If the aspect ratio information is detected in the first step, and the detected aspect ratio information is zoom information, the horizontal step effective screen size of the image signal to be displayed is set to the zoom aspect ratio and then the second step is performed. It is preferable to carry out.

And when the aspect ratio information is detected in the first step, and the detected aspect ratio information is 4: 3 information, the horizontal direction overall validity of the display module displaying the image signal as the horizontal effective screen size of the image signal to be displayed. It is preferable to extend the screen size and to set the 4: 3 aspect ratio in the vertical direction, and then perform the second step.

In addition, the aspect ratio information is detected in the first step, and if the detected aspect ratio information is not 16: 9, 14: 9, zoom, and 4: 3 information, the horizontal effective screen size of the image signal to be displayed is determined. It is preferable to perform the second step after expanding the horizontal effective full screen size of the display module displaying the video signal.

The display module is preferably a display module having a 16: 9 aspect ratio.

Therefore, according to the present invention, even if there is no aspect ratio information of the input video signal, the video signal can be displayed in full size on the entire effective screen of the display unit.

Hereinafter, an imaging apparatus and a display method thereof according to the present invention will be described with reference to the accompanying drawings.

2 is a block diagram illustrating a video device according to the present invention.

As illustrated in FIG. 2, the video device according to the present invention includes a video signal input unit 10, a video signal processor 20, an aspect ratio information processor 90, an image information detector 50, an output image processor 60, and a controller. 70, the display unit 80.

The video signal input unit 10 may include R, G, B video signals, Component (Y, Cb, Cr (Y, Pb, Pr)) signals, (CVSB: Composite Video Baseband Signal) signals, RF video signals, and the like. Receives and transmits to the video signal processor 20.

The video signal processor 20 decodes the video signal transmitted from the video signal input unit 10.

The aspect ratio information processor 90 may include one or more of the teletext processor 30 and the scat signal processor 40.

Here, the teletext processor 30 processes the aspect ratio (4: 3, 14; 9, 16: 9) information of the current video from the WSS information among the broadcast information of the video signal and transmits the information to the controller 70.

The scat signal processor 40 detects the aspect ratio information of the input image by using different voltages according to the aspect ratio of the image CVSB input through the scat jack of the imaging apparatus and transmits it to the controller 70. In this case, the scart signal processing unit 40 may be configured as a scart jack. In such a case, the aspect ratio of the input image may be detected by the controller 70 according to the voltage of the scart jack.

The vertical information detector 50 detects whether there is a letter box in the vertical direction from the video signal and transmits the letter box to the controller 70.

The output image processor 60 scales the vertical and horizontal sizes of the image signals processed by the image signal processor 20 and outputs them to the display unit 80.

The control unit 70 controls the output image processing unit 60 to display the input image signal on the display unit 80 at the aspect ratio detected according to broadcast information (WSS, scat identifier), or the display unit 80 regardless of the aspect ratio. Outputs a signal for controlling the horizontal and vertical size of the input image to the output image processing unit 60 so that the effective screen can be displayed in full size.

3 is a flowchart for explaining a display method of an imaging apparatus according to the present invention.

The display method of the video device according to the present invention is for displaying an input image in full size on the entire effective screen of the display module, and is a conventional original display module (CRT, LCD, PDP) having an aspect ratio of 16: 9. The mode and spectacle mode are, of course, to satisfy the full size mode.

The original mode is a mode for automatically setting the screen to 4: 3, 16: 9, 14: 9, and zoom according to broadcasting information such as WSS and Scart ID.

Spectacle mode automatically sets the screen to 4: 3, 16: 9, 14: 9 and Zoom according to broadcast information such as WSS and Scart ID. This mode extends horizontally for 14: 9 signals. At this time, the expansion rate of the image extending in the horizontal direction is not the same in both the center part and the center part, and the expansion rate of the image part of both parts of the center part is larger than that of the center part, thereby minimizing distortion of the main character or main image. Mode.

In addition, the Full Size mode extends the screen horizontally with the Spectacle function and then vertically detects black blanking (letter box) information at the top and bottom of the vertical direction. This mode expands to.

As shown in FIG. 3, when the video signal is input (S210), it is determined whether there is broadcast information in the video signal, and among them, aspect ratio information such as a wide screen system (WSS) or a scart identifier (S220).

As a result of the determination (S220), if the broadcast information does not exist, the horizontal size of the input video signal is extended to the horizontal effective full screen size of the display unit (display module) (S230).

Subsequently, the input image signal vertical size information is detected to detect the occurrence of the letter box in the vertical direction (S330), and it is determined whether the letter box information exists (S340).

As a result of determination (S340), if the letter box information is present, the vertical size of the input video signal is extended to the entire effective screen size of the display unit (display module) in the vertical direction (S350).

If it is determined that the broadcast information exists (S220), it is determined whether the information is 16: 9 (S240).

As a result of the determination (S240), if the 16: 9 information, the video signal to be displayed is set to the 16: 9 aspect ratio (S250).

If it is determined that the broadcast information is not 16: 9 broadcast information (S240), it is determined whether the broadcast information is 14: 9 information (S260).

As a result of the determination (S260), if the information is 14: 9, the horizontal size of the input video signal is extended to the horizontal effective full screen size of the display unit. In the vertical direction, the video signal to be displayed is set to a 14: 9 aspect ratio (S270). In the case of 14: 9, the spectacle mode is extended when the horizontal effective screen size of the image signal to be displayed is extended to the horizontal effective screen size of the display module.

If it is determined that the broadcast information is not 14: 9 broadcast information, it is determined whether the broadcast information is zoom information (S280).

As a result of the determination (S280), if the zoom information, the size of the input video signal is set to the zoom aspect ratio (S290).

If it is determined that the broadcast information is not zoom information (S280), it is determined whether the information is 4: 3 (S300).

As a result of the determination (S300), if the information is 4: 3, the horizontal size of the input video signal is extended to the entire horizontal effective screen size of the display unit. In the vertical direction, the video signal to be displayed is set to a 4: 3 aspect ratio (S310).

If it is determined that the broadcast information is not 4: 3 information, the horizontal size of the input video signal is extended to the entire horizontal effective screen size of the display unit (S320).

Subsequently, in each of the steps S250, S270, S290, and S310, the input image signal vertical size information is detected in the state of being extended in the horizontal direction and / or set to the respective aspect ratio to detect the occurrence of the letter box in the vertical direction ( In operation S330, it is determined whether letter box information exists in operation S340.

As a result of determination (S340), if the letter box information is present, the vertical size of the input video signal is extended to the entire effective screen size in the vertical direction of the display unit (display module) (S350).

The imaging apparatus and display method thereof according to the present invention described above have the following effects.

First, an image may be displayed in full size even when the aspect ratio is not included in the image signal or when the aspect ratio of the image signal is missed or an error occurs in the aspect ratio information during transmission from a broadcasting station.

Second, even when image information is loaded, the image signal cannot be displayed at full size regardless of the size of the display unit.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (11)

A video signal input unit which receives a video signal and transmits the video signal to a video signal processor; A video signal processor for decoding the video signal transmitted from the video signal input unit; An aspect ratio information processing unit for processing aspect ratio information from the video signal and transmitting the same to the control unit; A vertical information detector which detects whether a letter box exists in a vertical video signal from the video signal decoded by the video signal processor and transmits the letter box to the controller; An output image processor for adjusting the vertical and horizontal sizes of the image signals decoded by the image signal processor and outputting them to a display unit; The output image processing unit adjusts the vertical and horizontal sizes of the video signal according to the information transmitted from the aspect ratio information processing unit and the vertical information detection unit so that the image of the video signal can be displayed in full size on the effective screen of the display unit. And a control unit for generating a signal for controlling the control. The method of claim 1, The aspect ratio information processing unit, A teletext processor for processing aspect ratio information of a current video from teletext information of the broadcast information of the video signal; And at least one of a scat signal processing unit for detecting aspect ratio information of an input image by using different voltages according to an aspect ratio of an image input through a skat jack of the image apparatus. The method of claim 2, The scart signal processing unit comprises a scart jack (scart jack). A first step of extending the horizontal size of the input video signal to a horizontal full screen effective size of a display module displaying the video signal when no aspect ratio information is detected in the input video signal; When the vertical size information is detected in the display module of the input image signal and letter box information exists in the vertical direction, the vertical size of the input image signal is extended to the entire effective screen size in the vertical direction of the display module to display the image signal. And displaying a second step on the display module. The method of claim 4, wherein The aspect ratio information is detected in the first step, And if the detected aspect ratio information is 16: 9 information, setting the horizontal effective screen size of the image signal to be displayed to the 16: 9 aspect ratio, and then performing the second step. The method of claim 4, wherein The aspect ratio information is detected in the first step, If the detected aspect ratio information is 14: 9 information, the horizontal effective screen size of the video signal to be displayed is expanded to the horizontal full screen effective size of the display module displaying the video signal, and the vertical direction is 14 : Display method of a video device, characterized in that the second step is performed after setting to 9 aspect ratio. The method of claim 6, If the detected aspect ratio information is 14: 9 information, the spectacle mode is extended when the horizontal effective screen size of the video signal to be displayed is extended to the horizontal full screen effective size of the display module displaying the video signal. Display method of a video device, characterized in that. The method of claim 4, wherein The aspect ratio information is detected in the first step, And if the detected aspect ratio information is zoom information, setting the horizontal effective screen size of the image signal to be displayed as the zoom aspect ratio and performing the second step. The method of claim 4, wherein The aspect ratio information is detected in the first step, If the detected aspect ratio information is 4: 3 information, the horizontal effective screen size of the video signal to be displayed is extended to the horizontal full screen effective size of the display module displaying the video signal, and the vertical direction 4 is increased. : Display method of a video device, characterized in that the second step is performed after setting to 3 aspect ratio. The method of claim 4, wherein The aspect ratio information is detected in the first step, If the detected aspect ratio information is not 16: 9, 14: 9, zoom, and 4: 3 information, the horizontal effective screen size of the display module displaying the video signal is the horizontal effective screen size of the video signal to be displayed. And expanding the process to perform the second step. The method of claim 4, wherein And the display module is a display module having a 16: 9 aspect ratio.

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