KR20070067918A - Image processing apparatus and control method thereof - Google Patents

Abstract

An image processing apparatus and a method of controlling the image processing apparatus are provided to adjust a display size of an image corresponding to an input multimedia signal stored in a low resolution. A signal processing apparatus(100) includes a signal processor(120), a scaler(140), a display(150), and a controller(130). The signal processor receives a video signal and processes the video signal. The scaler scales the processed video signal. The display displays an image corresponding to the scaled video signal. The controller determines whether the image corresponding to the video signal includes a first region having a real image and a second region having no real image. The controller controls the scaler to extend the first region and display the image when it is determined that the image includes the first region and the second region.

Description

Image processing apparatus and control method thereof {IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREOF}

1 is a block diagram showing the configuration of an image processing apparatus according to an embodiment of the present invention;

2 is a flowchart illustrating an operation of an image processing apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: image processing apparatus 110: signal receiving unit

120: signal processing unit 130: control unit

140: scaler unit 150: display unit

The present invention relates to an image processing apparatus and a control method thereof, and more particularly, to an image processing apparatus and a control method capable of adjusting the size in which an image of an input multimedia signal stored at a low resolution is displayed.

An image processing apparatus such as a digital television is used for broadcasting signals transmitted from broadcasting stations, or multimedia signals input from a digital versatile disc player, a DVD player, a digital internet video express, or a personal computer. Signal processing is performed to output images and sound. The multimedia signal includes a video signal and an audio signal.

However, depending on the display format of the PC or in order to reduce the capacity of the data, the image signal is set to a small size, and the stored video signal may be reproduced at high resolution. For example, the image processing apparatus set to a resolution of 852 * 484 or 1024 * 768 receives a multimedia signal stored at a resolution of 350 * 160. In this case, the actual image of the input multimedia signal is displayed in a small size in some areas of the entire area of the display, and the remaining area of the display is blank and filled with black or blue.

Since the user prefers a larger size image, there is a need to adjust the size of the image displayed in such a small size.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems, and to provide an image processing apparatus and a control method capable of adjusting the size of displaying an image of an input multimedia signal stored at a low resolution.

In order to achieve the above object, the present invention provides a signal processor for receiving a video signal and performing a signal processing on the video signal, a scaling unit for performing scaling on the signal processed video signal, and the scaled image. If it is determined that the display unit for displaying an image based on the signal and the first region in which the actual image exists and the second region in which the actual image does not exist are included in the image based on the video signal, the first region is expanded. And a control unit for controlling the scaling unit to be displayed.

Here, the controller may determine that the blank section of the video signal is the second area.

The image processing apparatus may further include a user input unit including a first button, and the controller may determine the extent of expansion of the first area based on the number of times of inputting the first button.

The image processing apparatus may further include a user input unit including a second button corresponding to at least one direction, and the controller may extend the first area according to the corresponding direction when the second button is input. The scaling unit may be controlled to be displayed.

According to an aspect of the present invention, there is provided a signal processing unit for receiving a video signal and performing signal processing on the video signal, and a scaling unit for performing scaling on the signal processed video signal. Determining whether an image based on the signal processed image signal includes a first region in which an actual image exists and a second region in which the actual image does not exist, and wherein the first region and the second region are included. If it is determined that the first region is extended by the control method comprising the step of controlling the scaling unit to be displayed.

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

1 is a block diagram showing the configuration of an image processing apparatus 100 according to an embodiment of the present invention.

The image processing apparatus 100 performs signal processing on the multimedia signal to output an image and an audio. The image processing apparatus 100 may be a digital TV.

As illustrated in FIG. 1, the image processing apparatus 100 according to the present exemplary embodiment includes a signal input unit 110, a signal processor 120, a controller 130, a scaling unit 140, and a display unit 150.

The signal input unit 110 receives a multimedia signal transmitted from a broadcasting station or stored in a DVD player, Divx player, PC, etc. and provides the signal to the signal processing unit 120. Signal input unit 110 is an antenna and a tuner, or a terminal for receiving digital signals such as IEEE 1394, DVI (digital visual interface), HDMI (high definition multimedia interface) and analog signals such as component, S-Video, AV Composit It may include a receiving terminal.

The signal processor 120 may include a demodulator, a demultiplexer, a decoder, and the like. The demodulator outputs the multimedia signal from the signal input unit 110 in the form of a transport stream through a demodulation process and an error correction process. The demultiplexer separates the multimedia signal input from the demodulator into a video signal, an audio signal, and various additional data, and outputs it in the form of a bit stream. The decoder decodes the separated audio signal through a demultiplexer and outputs the decoded audio signal to a speaker (not shown), and decodes the video signal to output the scaler.

Here, the video signal includes a real image section corresponding to a region where a real image exists (hereinafter referred to as a first region) and a blank section corresponding to a region where the actual image does not exist (hereinafter referred to as a second region).

When the image signal of the multimedia signal input through the signal input unit 110 has a resolution smaller than the resolution of the display unit 150, the signal processor 120 outputs an image signal including an actual image section and a blank section. . The input multimedia signal may have a non-standard resolution rather than a standardized resolution.

The controller 130 determines whether the first region and the second region are included in the image corresponding to the image signal processed by the signal processor 120. When the controller 130 determines that the first region and the second region are included, the controller 130 displays a message on the display 150 asking the user whether to expand the first region, and through the user input unit (not shown). The user is selected to expand.

If the controller 130 determines that the first area is expanded by the user, the controller 130 receives a selection of the degree of expansion or the expansion direction of the first area. Here, the expansion degree and the expansion direction may be selected by the user through a user input unit (not shown) such as a remote control having a predetermined menu button and a direction button.

For example, the extent of extension of the first region may be sequentially increased according to the number of times the menu button is pressed, or the first region is expanded in a direction corresponding to the direction keys by a combination of a direction key provided in the remote controller and a predetermined menu button. , Can be controlled to display. The controller 130 controls the scaling unit 140 to expand and display the first region based on an input signal of the user input unit (not shown).

The controller 130 may be programmed in software so as to be suitable for a general purpose processor such as a CPU, and loaded into a predetermined main memory (eg, RAM) to be executed by the general purpose processor.

The scaling unit 140 controls the image signal received from the demultiplexer of the signal processor 120 to be suitable for the vertical frequency, resolution, aspect ratio, etc. corresponding to the expansion degree or the expansion direction selected by the user under the control of the controller 130. Convert.

The display unit 150 receives an image signal output from the scaling unit 140 and displays an image on the screen based on the image signal. The display unit 150 is input from a display module such as a cathode ray tube (CRT), a digital light processing (DLP), a liquid crystal display (LCD), a plasma display panel (PDP), etc., on which an image is displayed, and the scaling unit 140. It includes a module driver for processing the image signal to be displayed on the display module the image. When the display module is DLP, the module driver includes an optical engine. When the display module is an LCD, the module driver includes a printed circuit board for converting an image signal input from the scaling unit 140 into a data signal and a gate signal. do. As such, the display unit 150 may have a configuration of a corresponding module driver according to the type of each display module.

2 is a flowchart illustrating an operation of the image processing apparatus 100 according to an embodiment of the present invention. The operation of the image processing apparatus 100 according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

When the multimedia signal is input through the signal receiving unit 110 (S10), the signal processing unit 120 receives the received signal, separates it into modulation / demodulation, error correction, video signal and audio signal, and outputs and decodes a bit stream. The signal is output to the scaling unit 140 through a signal processing process such as S11.

The controller 130 determines whether the image of the signal-processed multimedia signal includes the first area and the first area (S12). In operation S12, when the controller 130 determines that the image of the multimedia signal does not include the first area and the second area, the scaling unit outputs an image corresponding to the multimedia signal according to the output standard of the display unit 150. 140 is controlled (S13).

In operation S12, when it is determined that the image of the multimedia signal includes the first area and the second area, the controller 130 displays a message on the display 150 asking the user whether to expand the first area. In step S14, the user input unit selects whether to expand through the user input unit (not shown).

In operation S14, when the controller 130 determines to expand the first region by the user, the controller 130 receives an expansion degree or an extension direction of the first region from the user (S15).

The controller 130 controls the scaling unit 140 so that the first region is expanded and displayed based on the selected expansion degree or expansion direction (S16). An image corresponding to the image signal on which the scaling process is performed is displayed on the display unit 150 (S17).

Accordingly, it is possible to provide an image processing apparatus capable of adjusting a size at which an image of an input multimedia signal stored at a low resolution is displayed.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made to the embodiment without departing from the spirit or spirit of the invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

As described above, according to the present invention, an image processing apparatus capable of adjusting the size of displaying an image of an input multimedia signal stored at a low resolution can be provided.

Claims (5)

In the image processing apparatus, A signal processor which receives a video signal and performs signal processing on the video signal; A scaling unit which performs scaling on the signal processed image signal; A display unit which displays an image based on the scaled video signal; If it is determined that the image based on the video signal includes a first region in which the actual image is present and a second region in which the actual image does not exist, the controller includes a control unit to control the scaling unit so that the first region is extended. Image processing apparatus, characterized in that. The method of claim 1, And the controller determines that the blank section of the video signal is the second area. The method according to claim 1 or 2, The image processing apparatus, Further comprising a user input unit having a first button, And the controller is configured to determine the extent of expansion of the first area based on the number of inputs of the first button. The method according to claim 1 or 2, Further comprising a user input unit having a second button corresponding to at least one direction, And the controller controls the scaling unit so that the first area is extended and displayed according to a corresponding direction when the second button is input. A control method of an image processing apparatus comprising: a signal processor configured to receive an image signal and perform signal processing on the image signal; and a scaling unit configured to perform scaling on the signal processed image signal. Checking whether the image based on the signal processed image signal includes a first region in which an actual image exists and a second region in which no actual image exists; If it is determined that the first area and the second area are included, controlling the scaling unit so that the first area is extended and displayed.

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