KR100830469B1 - Method for zoom processing used PIP function of digital TV and Digital TV thereof - Google Patents

Abstract

The present invention relates to a method for executing a zoom function using a PIP of a digital TV effectively processing zooming with an ARC function using a PIP function, and a digital TV. The present invention provides a method of controlling a zoom function, comprising: selecting a zoom function by a user; Displaying an image displayed on a main screen on a sub screen by operating a PIP function according to the selection of the zoom function; Selecting a specific region on the sub-screen; And displaying an image of the selected region on the main screen in a zooming manner. In the selection step of the specific area, a cursor for setting an area on the sub screen is displayed, and a cursor up / down signal is inputted from a remote control input of the user to select a specific area on the screen. Therefore, the ARC function using the PIP can more effectively process the zooming operation of the image, so that a user can selectively zoom in on a specific area and display the selected area on the screen. In particular, Since the work is performed, the zoom operation can be performed conveniently.

Digital TV, PIP, ARC, Zoom, Main screen, Sub screen, Movie

Description

Technical Field [0001] The present invention relates to a method of performing a zoom function using a digital TV and a digital TV,

1 is a block diagram showing a conventional digital TV.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

3 is a flowchart illustrating a method of executing a zoom function using a PIP of a digital TV according to the present invention.

4 is a diagram illustrating a process of setting a zoom area in a PIP screen according to the present invention.

Description of the Related Art

240: video signal processing unit 241: main video processing unit

242: Sub-image processing unit 243:

250: display unit 270:

280: memory unit 290: remote control input unit

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital TV, and more particularly, to a PIP of a digital TV that effectively performs zooming by using an Aspect Ratio Converter (ARC) function using a PIP (Picture in Picture) A method of executing the zoom function used, and a digital TV.

Stereo sound, remote control device, subtitle broadcasting, and data broadcasting have been accepted by some digital technologies since the analogue color TV broadcasting in the past. In the 1990s, computer and network technology spread more rapidly, Digital TV to be realized. Broadcasting is a mass media targeted at an unspecified number of people, and it is advantageous because it can compress all the elements (video, audio, data) as digital data when it is changed in digital manner, as in the compression of computer data. Therefore, digital TV can transmit one program of HDTV class and three or more programs of SDTV class to one channel, and it can enjoy a much cleaner screen by transmitting and processing signals digitally. In addition, it is possible to solve the phenomenon of screen overlapping (ghosting) in which radio waves are reflected by an obstacle, and it is possible to enjoy a realistic screen and stereoscopic sound which are enjoyed only in a movie theater in the HDTV channel.

In addition, additional data can be added to the digital TV. For example, multimedia related services such as information related to programs, a large number of real-time information such as stocks, exchange rates, weather forecasts, and Internet information can be provided.

One of the characteristics of digital TV is that it is interactive and multimedia broadcasting. The bidirectional (bidirectional) TV is a bidirectional information flow between a viewer and a broadcast time, rather than a single stream, and the viewer is provided with various interactive additional information such as basic news, weather, and program related information . Then, the viewer can access desired information service by accessing the information service company connected to the additional information through a telephone line or a separate dedicated line. This type of operation is also called interactive TV.

Multimedia broadcasting is a general digital broadcasting concept in which a broadcast TV program and various additional information are transmitted together in a multimedia form including video, sound and various data, displayed on a TV screen, and a viewer can select and enjoy information.

Digital TVs are being developed in a way that combines the concept of interactive TV and multimedia broadcasting. In addition, various information including the Internet is broadcasted, so that it is possible to acquire information by using only a TV without a computer.

Such a digital TV basically separates a user input device such as a remote controller (hereinafter referred to as a remote controller), audio / video information and additional information from a broadcast signal and separates various channel information from service information among them A / V processing unit for decoding audio / video information, and a control unit for controlling display of an operation of the TV and an EPG (Electronic Program Guide) which is broadcast program information.

The additional information generally includes a PAT (Program Association Table), a TDT (Time Date Table), a TOT (Time Offset Table), and an EIT (Event Information Table). The PAT includes information on a plurality of programs, and the TDT / TOT includes time information of each programs. The EIT includes information such as title, plot, broadcast restriction level, start / end time, and broadcast time of programs.

1 is a block diagram showing a conventional digital TV.

As shown in the figure, the conventional digital TV has a DTV tuner unit 100 that physically selects a specific channel and receives a digital broadcast signal in the form of a transport stream in a selected channel, a DTV tuner unit 100 that receives the DTV tuner unit 100, A demodulator 110 demodulating the stream; A transport DEMUX 120 for demultiplexing the demodulated transport stream into respective video bit streams (MPEG-2 Bitstream), audio bit streams (AC-3 Bitstream), and PSIP data; A decoder 130 for decoding the signals demultiplexed by the transport demux 120 and outputting video and audio signals; A video signal processor 140 for converting the decoded video signal into a video output format that can be displayed by the decoder 130; A display unit 150 for displaying the video signal processed by the video signal processing unit 140 on a screen; A speaker 160 for outputting the audio signal; Outputs a channel and program selection signal to the DTV tuner unit 100 and the demodulator unit 110 according to the user's program selection and the PSIP data output from the transport DEMUX 120, A controller 170 for providing a storage command of a video signal set by a user, A storage unit 180 for storing a video signal received through the DTV tuner unit 100 according to a video signal storage command of the controller 170 and a remote controller input unit 190 for inputting a remote control command of the user do.

The decoder unit 130 includes a video decoding module 131 for decoding a video bit stream (MPEG-2 Bitstream) into a video signal, an audio decoding module 131 for decoding an audio bit stream (AC-3 Bitstream) And a clock recovery and A / V synchronization signal of the video decoding module 131 and the audio decoding module 132, respectively, from a time stamp (Time Stamps) signal from the respective video and audio bit streams, Clock recovery and A / V synchronization processing unit 133. [

In addition, the image signal processor 140 includes a scaler and an ARC (Aspect Ratio Converter) function. The image signal processor 140 includes a 4: 3 screen, a 16: 9 screen, a zoom ), Wide (Wide), or Spectacle (Spectacle).

However, in the conventional digital TV as described above, the zoom function is performed on the entire screen. Therefore, if zooming is performed after the zoom function is not performed in a desired area, the main screen should be restored to the original screen Moreover, when the main screen is a moving picture, since the screen continuously changes, there is a problem that it is difficult to perform the zooming function of the area desired by the user on the continuous screen.

In addition, since the zoom function is performed only at a predetermined position of the entire screen area, there is a problem that the user can not selectively zoom in a specific area desired.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a digital TV in which a zoom operation of an image is more effectively processed by an ARC function using a PIP, A method of executing a zoom function using a PIP, and a digital TV.

According to an aspect of the present invention, there is provided a method of performing a zoom function using a PIP of a digital TV, the method comprising: selecting a zoom function by a user; Displaying an image displayed on a main screen on a sub screen by operating a PIP function according to the selection of the zoom function; Selecting a specific region on the sub-screen; And displaying an image of the selected region on the main screen in a zooming manner.

In the selection step of the specific area, a cursor for setting an area on the sub screen is displayed, and a cursor up / down signal is inputted from a remote control input of the user to select a specific area on the screen.

When a user inputs a start and end signal of a zoom area on the sub screen in response to a remote control input, the user selects a zoom area corresponding to the start and end signals from the stored image, Extracts the image and displays it on the main screen.

A map for the screen position can be set in advance so that an area capable of zooming can be displayed according to the resolution of the main screen.

A zoom digital TV using a PIP according to the present invention includes a display unit for displaying a main screen and a sub screen; A remote control input unit for outputting a zoom function selection signal by a user and selecting a specific area on the sub screen; A control unit for operating the PIP function according to the zoom function selection of the remote control input unit to display an image displayed on the main screen on the sub screen and zooming a specific area selected on the sub screen; And a video signal processor for zooming and displaying an image of a specific region selected in the sub-screen on the main screen under the control of the controller.

The control unit displays a cursor for setting a specific area on the sub-screen through the video signal processing unit on the screen of the display unit, receives a cursor up / down signal from the input signal of the remote control input unit by the user, Select a specific area.

And a memory for storing an image of a setting area on the screen of the display unit, wherein when the start and end signals of the zoom area are input from the input of the remote control input unit by the user on the sub screen, From the image stored in the memory, and extracts the image of the selected region and displays it on the main screen of the display unit.

The controller may set a map of the screen position so that an area capable of zooming may be displayed according to the resolution of the main screen.

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

2 is a block diagram showing a digital TV in which a zoom function is performed using a PIP according to the present invention.

The main image processing unit 241, the sub image processing unit 242, the scaler processing unit 243, the display unit 250, the control unit 270, the memory unit 280 And a remote control input unit 290.

The image signal processing unit 240 zooms the image of the specific region selected on the sub-screen on the main screen according to the control of the control unit.

The video signal processor 240 includes a main video processor 241 constituting a main screen, a sub video processor 242 constituting a sub screen, a scaler processor 243 for controlling screen division and scaling of the video, .

The display unit 250 displays a main screen and a sub screen, and the memory unit 280 stores an image of a setting area on the screen of the display unit 250. Also, the remote control input unit 290 outputs a zoom function selection signal by the user, and selects a specific area on the sub screen.

The remote control input unit 290 is preferably a wireless remote controller having a normal infrared transmission / reception function.

The control unit 270 operates the PIP function according to the zoom function selection of the remote control input unit 290 to display an image displayed on the main screen on the sub screen, do.

The control unit 270 displays a cursor on the screen of the display unit 250 for setting a specific area on the sub screen through the video signal processing unit 240 and displays the cursor on the screen of the remote control input unit 290 And receives a cursor up / down signal from an input signal to select a specific area on the screen.

When the user inputs start and end signals of the zoom area on the sub screen from the input of the remote control input unit 290, the control unit 270 stores a zoom area corresponding to the start and end signals in the memory 280 And displays an image of the selected region on the main screen of the display unit 250.

The control unit 270 may be a micro-computer, a central processing unit (CPU), or a micro processing unit (MPU) having a numerical operation and a comparison / judgment function. And a register (not shown).

3 is a control flowchart illustrating a method of performing a zoom function using a PIP of a digital TV according to the present invention.

As shown in the figure, the present invention includes a step S101 of selecting a zoom function by a user; A step (S102 to S104) in which a PIP function is operated according to the zoom function selection to display an image displayed on a main screen on a sub screen; Selecting a specific area on the sub-screen (S105 to S107); (S108 to S110) in which the image of the selected area is zoomed and displayed on the main screen.

At this time, in the selection of the specific area, a cursor for setting an area on the sub screen is displayed, and a specific area on the screen is selected by receiving a cursor up / down signal from a user's remote control input. When a user inputs a start and end signal of a zoom area on the sub screen in response to a remote control input, the user selects a zoom area corresponding to the start and end signals from the stored image, Extracts the image and displays it on the main screen. A map for the screen position can be set in advance so that an area capable of zooming can be displayed according to the resolution of the main screen.

4 is a diagram illustrating a process of setting a zoom area in a PIP screen according to the present invention.

As shown in the figure, the present invention is characterized in that the sub-screen 20 is divided into equal parts (ab section, cd section) according to the horizontal / vertical size, (Start / End) position information is stored in the register of the controller 270. When the zoom area selection operation is completed, zooming is performed at a ratio corresponding to the start / end position information. The start / end position can be freely designated, and the one-frame movement can be set by the controller 270 as to how many steps the pixel size should be set.

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

First, the DTV tuner unit 100 receives a digital broadcast signal in the form of a transport stream in a selected channel, and the demodulator unit 110 demodulates the transport stream received by the DTV tuner unit 100.

The transport demux 120 demultiplexes the demodulated transport stream into respective video bit streams, audio bit streams, and PSIP data. Each of the signals demultiplexed in the transport DEMUX 120 is decoded by the decoder 130 and output as a video signal and an audio signal, respectively.

That is, the video decoding module 131 of the decoder 130 decodes a video bit stream (MPEG-2 Bitstream) into a video signal, and the audio decoding module 132 converts an audio bit stream (AC- And the clock recovery and A / V synchronization processing unit 133 receives a time stamp signal from each of the video and audio bitstreams, and outputs the time stamps to the video decoding module 131 and the audio decoding module 132, Clock recovery and A / V sync signals.

In addition, the video signal processing unit 140 converts the decoded video signal from the video decoding module 131 into a video output format capable of being displayed. Also, the display unit 150 displays the video signal on the screen, and the speaker 160 outputs the audio signal to the indoor / outdoor space.

In the state that the general image display process is performed, the user performs the step of selecting the zoom function. At this time, the remote control input unit 290 outputs a zoom function selection signal by the user (S101).

The PIP function is operated according to the zoom function selection to display an image displayed on the main screen on the sub screen (S102 to S104).

Accordingly, the control unit 270 operates the PIP function according to the selection of the zoom function of the remote control input unit 290 so that an image displayed on the main screen is displayed on the sub screen, The main screen is configured through the image processing unit 241 and the sub screen is configured through the sub image processing unit 242. The display unit 250 displays the main screen and the sub screen.

Thereafter, a step of selecting a specific region on the sub-screen is performed (S105 to S107).

That is, a cursor up / down signal is input from the input signal of the remote control input unit 290 by the user, and a specific area on the screen is selected. In particular, when the start and end signals of the zoom area are inputted from the input of the remote control input unit 290 by the user, the control unit 270 outputs a zoom area corresponding to the start and end signals to the memory 280, And displays an image of the selected region on the main screen of the display unit 250.

Then, the image signal processing unit 240 zooms the image of the specific region selected in the sub-screen on the main screen according to the control of the controller 270 (S108 to S110).

At this time, the scaler processing unit 243 of the video signal processing unit 240 controls the screen division and scaling of the video according to the control of the controller 270, and as the ARC function, : It is possible to scale image ratios of various sizes such as 3 screen, 16: 9 screen, zoom, wide or spectacle.

In addition, the controller 270 may display on the screen a number of times (%) to zoom in according to a user's input, and may display the main screen in accordance with a magnification selected with respect to the designated backlight.

That is, as shown in FIG. 4, according to the present invention, the sub-screen 20 is divided into equal parts (ab section, cd section) according to the horizontal / vertical size, The start / end position information to be zoomed is stored in the register of the control unit 270, and when the zoom area selection operation is completed, zooming is performed at a ratio corresponding thereto.

The start / end position can be arbitrarily designated freely by the user through the remote control input unit 290, and the one-frame movement can be set by the control unit 270 in several steps of the pixel size.

Therefore, the ARC function using the PIP can more effectively process the zooming operation of the image, so that a user can selectively zoom in on a specific area and display the selected area on the screen. In particular, Since the work is performed, the zoom operation can be performed conveniently.

In the present invention, a PIP function, that is, a function of displaying pictures in a picture, is used as an embodiment. However, as another embodiment of the present invention, ) You can also use the function of floating picture next to the picture.

The present invention can be applied not only to flat panel display devices such as OLED, PDP, and LCD but also to projection TV, general TV, monitor and other video devices, and is equally applicable to analog TV, digital TV, have. Also, it can be applied to both NTSC, PAL and SECAM.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the scope of the invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the appended claims.

As described above, according to the method of executing the zoom function using the PIP of the digital TV according to the present invention and the digital TV, the zoom operation of the image is more effectively processed by the ARC function using the PIP, In particular, even in the case of a moving picture, since the zoom area selection operation is performed on the sub screen separate from the main screen, it is possible to conveniently perform the zoom operation.

Claims (8)

Selecting a zoom function by a user; Displaying an image displayed on a main screen on a sub screen by operating a PIP function according to the selection of the zoom function; Displaying a cursor for setting an area on the sub-screen, receiving a cursor up / down signal from a user's remote control input, and selecting a specific area on the sub-screen; And zooming the displayed image of the selected region on the main screen to display the zoomed image on the main screen. delete The method according to claim 1, When a user inputs a start and end signal of a zoom area on the sub screen in response to a remote control input, the user selects a zoom area corresponding to the start and end signals from a stored image, Extracting an image and displaying the extracted image on a main screen. The method according to claim 1, Wherein a map for a screen position is previously set so that an area capable of zooming according to a resolution of the main screen can be displayed. A display unit for displaying a main screen and a sub screen; A remote control input unit for outputting a zoom function selection signal by a user and selecting a specific area on the sub screen; The PIP function is operated according to the selection of the zoom function of the remote control input unit so that an image displayed on the main screen is displayed on the sub screen and a cursor for setting a specific area on the sub screen through the image signal processing unit is displayed on the display unit A control unit for receiving a cursor up / down signal from an input signal of the remote control input unit by a user to select a specific area on the screen, and controlling the zooming of a specific area selected on the sub screen; And a video signal processor for zooming and displaying an image of a specific area selected in the sub screen under the control of the controller on the main screen. delete 6. The method of claim 5, Further comprising a memory for storing an image of a setting area on the display unit screen, Wherein the control unit selects a zoom area corresponding to the start and end signals from the image stored in the memory when the start and end signals of the zoom area are inputted from the input of the remote control input unit by the user, Extracting an image and displaying the extracted image on a main screen of the display unit. 6. The method of claim 5, The control unit Wherein a map for a screen position is set in advance so that an area capable of zooming according to a resolution of the main screen can be displayed.

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