KR100648924B1 - Display device and method for displaying - Google Patents

Abstract

A display device and a display method are disclosed. According to an exemplary embodiment of the present invention, a display device includes a MHEG decoder unit for receiving an MHEG broadcast signal and separating an image signal, a scaler unit for changing a screen size of the separated image signal, and displaying an image with a changed screen size. And a controller for driving the scaler to display an image at a display unit and a screen size to display the image and to display the image on the display unit. As a result, the size of the screen displayed on the display device can be selected, thereby providing convenience to the user.

Scaler section, size selection key

Description

Display device and method for displaying}

1 is a block diagram of a display device according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a screen in which an image consisting of pictures and text is displayed on the display unit of FIG. 1 according to a size selection; FIG.

3 is a flowchart illustrating a screen in which an image composed only of text is displayed on the display unit of FIG. 1 according to a size selection;

4 is a flowchart illustrating a display method according to an embodiment of the present invention.

* Description of symbols on the main parts of the drawings *

110: switching unit 120: MHEG encoder unit

130: display unit 150a: size selection key

170: digital signal processing unit 172: scaler unit

174: MHEG decoder unit 180: control unit

The present invention relates to a display device and a display method for receiving an MHEG broadcast signal and displaying an image.

In general, a display device is a device for visually displaying data and refers to a computer monitor or a television receiver. The most widely used display device is a cathode ray tube display device, and a flat screen display device such as a liquid crystal display (LCD) or a plasma display device is mainly used in small and portable computers.

Recently, as interest in digital television has increased, studies on various application softwares applied thereto have been actively conducted. Among them, the Multimedia and Hipermedia information coding Expert Group (MHEG) is a standard for multimedia and hypermedia data technology, which aims to standardize the control, format, synchronization, and multiplexing methods of multimedia and hypermedia. MHEG is actively being studied in Europe and many other countries that adopt the Digital Video Broadcating (DVB) standard.

MHEG is an MHEG object that can be called contents transmitted through a communication network, and it is received by a receiving system such as a digital television and converted into data that can be used by a user through a series of processes. The main consists of two parts of the MHEG engine.

The process of receiving MHEG objects from the network by the MHEG engine follows the Digital Storage Media Command Control (DSM-CC) protocol, which is proposed as part of the Multimedia Picture Expert Group (MPEG) standard for controlling audio or video streams in a distributed environment.

Broadcasting using MHEG uses data in various formats such as audio, video, image file, or text, but in fact, the main screen is composed mainly of text, and there are quite a lot of broadcasts composed only of text.

However, MHEG has no provisions for screen size selection for teletext, which is used in the analog television European Phase Alteration by Line system (PAL). If the size is small, there is a problem that inconveniences the user.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display apparatus and a display method that provide convenience to a user by adopting a screen size selection function when receiving an MHEG broadcast signal and displaying an image.

The display device according to the present invention for achieving the above object is an MHEG decoder unit for receiving an MHEG broadcast signal to separate the video signal, a scaler unit for changing the screen size of the separated video signal, displays the image in the changed screen size And a controller configured to control the image to be displayed on the display unit by driving the scaler to display an image at a display unit and a screen size.

Preferably, the apparatus further includes a key input unit having a size selection key for changing the screen size.

The changed screen size is either a normal size for displaying an image on the full screen, a double top for doubling the top half of the image, and a double bottom for doubling the bottom half of the image. It is characterized by one.

Meanwhile, the display method according to the present invention includes receiving an MHEG broadcast signal, separating the video signal, and changing the screen size of the separated video signal to display the video.

The selected screen size is either a normal size for displaying an image on the full screen, a double top for doubling the top half of the image, and a double bottom for doubling the bottom half of the image in full screen. It is characterized by one.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. However, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a display apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the display apparatus 100 includes a switching unit 110, an MHEG encoder unit 120, a display unit 130, a storage unit 140, a key input unit 150, a light receiving unit 160, and a digital signal processing unit. It comprises a 170 and the controller 180.

The switching unit 110 receives various image data or audio data sources from the outside, or outputs the image data source output from the digital signal processing unit 170 to the display unit 130. The switching unit 110 selectively connects an external signal source applied from the outside to a functional block in the display apparatus 100. For example, when the external signal source applied from the outside is an MHEG broadcast signal, the external signal source is applied to the MHEG encoder unit 120.

The MHEG encoder unit 120 converts an analog form from an image form of an image data source applied from the switching unit 110 and converts it into a predetermined format.

The display unit 130 displays a screen of a size selected by the user.

The storage 140 stores a program of the controller 180 and stores a list of screen sizes that can be selected by the user under the control of the controller 180 when the user wants to select a screen size. In addition, a screen display database for storing an image on the display unit 130 according to the screen size selected by the user is stored.

The key input unit 150 includes a size selection key 150a for selecting a screen size. When there is an input of the size selection key 150a, a key input signal corresponding to the size selection key 150a is applied to the controller 180. For example, when the size selection key 150a is inputted, the screen may be displayed on the display unit 130 in the order of a normal size, a double top or a double bottom.

The key input unit 150 may be provided in a remote control device (not shown) as well as the display device 100.

In the present invention, the screen size can be selected only by the input of the size selection key 150a, but the user can select the screen size by displaying a GUI (Graphic User Interface) screen for screen selection on the display unit 130. have.

The light receiver 160 receives a control signal (not shown) generated by the remote controller device for controlling the display apparatus 100 and applies it to the controller 180.

The digital signal processor 170 includes an MHEG decoder 174 and a scaler 172, and receives image data of the MHEG broadcast signal via the controller 180.

The MHEG decoder 174 decodes the image data of the MHEG broadcast signal, and the scaler 172 uses the signal output from the MHEG decoder 174 to display the screen according to the selected screen size transmitted from the controller 180. It is displayed on the display unit 130.

In the present invention, the screen size is changed after processing the digital signal, but the digital signal processing may be performed after changing the screen size first.

The controller 180 controls the scaler 172 to record the MHEG data output from the MHEG encoder 120 to the display apparatus 100 or to display a screen according to a screen size selected by a user when playing an image. do.

2 and 3 are flowcharts illustrating screens displayed on the display unit of FIG. 1 by screen size selection. FIG. 3 is a case where a screen is composed of pictures and text, and FIG. 4 is a case where the screen is composed of text only.

1 and 2, when an MHEG broadcast signal including pictures and texts is received as an external signal source and displayed on the display unit 130, a full screen having a normal size is initially displayed (S210). The entire screen consists of a top half a and a bottom half b.

Once the size selection key 150a is input, the screen is displayed on the display unit 130 in a double top size in which the top half a of the full screen is doubled (S220).

Subsequently, when the size selection key 150a is input again, the screen is displayed on the display unit 130 in a double bottom size in which the lower half b of the entire screen is doubled (S230).

When the size selection key 150a is input again, the entire screen having the normal size is displayed again (S210).

In the present invention, when the size selection key 150a is input, the screens are displayed in the order of the normal size, the double top or the double bottom. However, the order in which the screens are displayed and the kind of the size can also be assumed.

1 and 3, when an MHEG broadcast signal consisting of text only is received as an external signal source, a full screen consisting of the upper half c and the lower half d, which are normally normal sizes, is displayed (S310), and the size selection key ( If 150a) is input once, the upper half c is enlarged and displayed (S320).

Subsequently, when the size selection key 150a is input again, the lower half b is enlarged and displayed twice (S330). When the size selection key 150a is input again, the normal screen is displayed again (S310). ).

In particular, since the screen shown in FIG. 3 is composed of text only, the present invention will be more useful when a double top or double bottom size is selected to enlarge the screen.

4 is a flowchart illustrating a display method according to an embodiment of the present invention.

1 and 4, a broadcast signal that is an external signal source applied from the outside is received (S410).

When the MHEG broadcast signal is found among the received broadcast signals, the MHEG decoder 120 is selectively separated by the switching unit 110, compressed by the MHEG encoder unit 120 in a predetermined format, and output by the MHEG decoder unit 174 (S420). .

Under the control of the controller 180, the normal size of the screen by the MHEG broadcast signal is displayed on the display unit 130 (S430).

When the user selects the size of the screen (S440, YES selection), a key input signal of the size selection key 150a is applied (S450).

When the size selection key 150a is input once, the screen is displayed in the double top size, and when the size selection key 150a is input again, the screen is displayed in the double bottom size (S460).

Subsequently, when the key input signal of the size selection key 150a is reapplied (S470), the screen is displayed again in the normal size (S470).

According to the display device and the display method according to the present invention as described above, it is possible to select the screen size by the MHEG broadcast signal mainly made of text. Therefore, it is possible to provide convenience to the user who watches the MHEG broadcast, which has no provision regarding the screen size selection.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (5)

An MHEG decoder configured to receive an MHEG broadcast signal and separate an image signal; A scaler for changing a part size of a screen of the separated video signal; A display unit which displays an image at the changed screen size; And And a controller configured to control the image to be displayed on the display unit by driving the scaler to display the image at the screen size. According to claim 1, And a key input unit having a size selection key for changing the screen size. According to claim 1, The changed screen size is One of a normal size for displaying the image on the full screen, a double top for doubling the top half of the image on the full screen, and a double bottom for doubling the bottom half of the image on the full screen. Display device characterized in that. Receiving the MHEG broadcast signal and separating the video signal; And And displaying the image by changing a screen size of the separated image signal. The method of claim 4, wherein The selected screen size is, One of a normal size for displaying the image on the full screen, a double top for doubling the top half of the image on the full screen, and a double bottom for doubling the bottom half of the image on the full screen. Display method characterized in that.

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