KR100627895B1 - Apparatus for adjusting size and zoom of sub image in television and method thereof - Google Patents

Abstract

The present invention relates to a sub-screen size and zoom control apparatus and method of the television, and more particularly, to a specific image desired by a user on a sub-screen when watching in a PIP mode on a television that can display a main screen and a sub-screen in a PIP mode. When the screen is input, it can automatically adjust the size and zoom of the sub-screen to overcome the limited viewing caused by the sub-screen size, and also remove the sub-screen when the harmful screen is input to the video inputted to the sub-screen. There is an advantage that it is possible to watch healthy television with.

PIP, sub picture, screen size, zoom function, luminance signal, match

Description

Subscreen size and zoom control of television and its method {APPARATUS FOR ADJUSTING SIZE AND ZOOM OF SUB IMAGE IN TELEVISION AND METHOD THEREOF}             

FIG. 1 is a block diagram schematically illustrating an image processing system of a television having a sub picture display function by a general picture in picture (PIP) mode.

2 is a block diagram illustrating a sub-screen size and a zoom control device of a television according to the present invention.

3 is a flowchart illustrating a method for adjusting a sub-screen size and zoom of a television according to the present invention.

   -Explanation of symbols for the main parts of the drawings-

10: remote controller 12: control unit

14: Tuning data memory 16,20: 1st, 2nd tuner

18, 22: first and second image IF processing unit 24: PIP processing unit

26: PIP switching output unit 28: image processing unit

30: CRT device 32: luminance signal separation unit

34: A / D converter 36: comparison image storage unit

38: zoom data converter

The present invention relates to a sub-screen size and zoom control apparatus and method of the television, and more particularly, to a specific image desired by a user on a sub-screen when watching in a PIP mode on a television that can display a main screen and a sub-screen in a PIP mode. The present invention relates to a sub-screen size and zoom control apparatus and method for adjusting a sub-screen size and a zoom automatically to overcome limited viewing due to the sub-screen size when a screen is input.

The digitalization of information spread from the computer industry to the information and communication industry has recently been extended to television broadcast signals. Digitization of television broadcast signals will realize a two-way multimedia era in which a new paradigm that is fused with technology in the computer and communication fields is realized.

Digital broadcasting is centered around the European Digital Video Broadcasting (DVB) standard and the ATV (Advanced TV) standard of the US FCC. It complies with the ATSC standard that the United States decided as the next generation TV method, replacing the NTSC standard that symbolizes the existing analog TV.

The difference between digital television and traditional analog television is divided into picture quality, sound quality, aspect ratio and others as follows.

First, in terms of image quality, an analog TV using 525 horizontal scanning lines has a horizontal resolution of about 330 lines that determines viewing quality, whereas a high definition (HD) digital TV has a horizontal resolution of about 700 lines. It is more than twice as clear as the TV.

In terms of sound quality, conventional analog TVs provide only two channels of stereo sound, while digital TVs using AC3 technology provide 5.1 channels of stereo sound that can be enjoyed in theaters.

In terms of the aspect ratio, the conventional analog TV has an aspect ratio of 4 to 3, whereas digital TVs have a wide aspect ratio of 16 to 9, similar to a theater screen.

What distinguishes digital TV from analog TV is not only a dramatic change in picture quality and sound quality. Digital TVs are data compatible with serial interfaces implemented via IEEE 1394 interface technology, such as digital versatile disc (DVD) players, digital camcorders, and digital VCRs that process digital signals as well as PCs.

Therefore, digitalization of broadcast signal will accelerate the convergence of communication, computer, and broadcasting due to the spread of media using the compressor method, and will be internationalized and multi-channel as a single media with complex functions. Above all, introducing a digital system to a broadcast signal can provide various data services that could not be realized in analog. In addition, the digitization of the broadcast signal may be performed by multiplexing and transmitting information in the vertical retrace period of the TV video signal or by using a separate channel, such as character information, image information, product information, and broadcast program information for a television or computer owner (aka electronic). Data broadcasting, a new media service that provides multimedia information such as an Electronic Program Guide (EPG), can be implemented.

In addition, since digital television processes a video image in a digital manner, a still image or a zoom function of the video image may be applied.

On the other hand, PIP (picture in picture) which adopts a plurality of tuners and displays a small screen (sub picture) at the same time separately from the screen (main screen) which saw the video signal of each channel tuned by the tuner. The function is commonly used.

1 is a block diagram schematically illustrating an image processing system of a television having a sub picture display function by a general picture-in-picture (PIP) mode.

As shown here, the remote control unit 10 transmits a remote control signal for selectively executing the overall functions of the television, and the control unit 12 controlling the execution of a function corresponding to the remote control signal transmitted from the remote control unit 10. ), And tuning data for the entire channel selectable from the television is stored and accessed by the control section 12.

Then, the first tuner 16 which performs the tuning of the channel corresponding to the tuning data VT1 applied from the control unit 12 and the video signal component of the channel tuned by the first tuner 16 are predetermined. A first video IF processing unit 18 for IF conversion processing by frequency, a second tuner 20 for performing channel tuning corresponding to the channel selection data VT2 applied from the control unit 12, and a second tuner ( And a second video IF processing unit 22 for IF converting the video signal components of the channel selected by 20) by a predetermined intermediate frequency.

In addition, when the PIP mode is set, the video IF signal selected by the second tuner 20 in response to the PIP control signal applied from the control unit 12 and applied by the second video IF processing unit 22 may be compressed. The sub picture signal processed by the PIP processing unit 24 by timing matching with the switching signal S / W of the sub picture signal applied from the control unit 12 in the PIP mode and the PIP processing unit 24 processing as the sub picture signal. PIP switching output section 26 for switching output.

Then, only the image IF signal processed by the first image IF processor 18 is reproduced and applied to the CRT device 30 so as to be reproduced or when the PIP mode is set, the image IF signal processed by the first image IF processor 18 is set. And an image processing unit 28 for mixing the sub picture signal outputted from the PIP switching output unit 26 to a predetermined position and applying the same to the CRT device 30 to reproduce it.

Therefore, when a specific channel number is designated by the remote controller 10 in the state where the PIP mode is not set by the remote controller 10, the control unit 12 selects the tuning data VT1 for the channel number of the tuning target. ) Is applied to, for example, the first tuner 16, so that the image signal component of the channel tuned by the first tuner 16 is IF converted by the first image IF processor 18 to perform image conversion. Is reproduced by the R / G / B color component, and the reproduced video signal is applied to the CRT device 30 for reproduction.

In this way, while the video signal of the channel tuned by the first tuner 16 is reproduced to the CRT device 30, the remote control signal for setting the PIP mode from the remote controller 10 and the channel number of the PIP mode are transmitted. The ground controller 12 accesses the tuning data VT2 corresponding to the channel number from the tuning data memory 14 to the second tuner 20 and applies the PIP control signal to the PIP processing unit 24. do. Accordingly, the image signal component of the channel tuned by the second tuner 20 is IF converted by the second image IF processor 22 and applied to the PIP processor 24, and the PIP processor 24 is applied to the second image IF. The image IF signal applied by the processing unit 22 is compressed to a sub-screen size and applied to the PIP switching output unit 26.

Then, the PIP switching output unit 26 is timing-matched to the switching signal S / W of the sub picture signal applied from the control unit 12 and outputs to the image processing unit 28. Accordingly, the image processing unit 28 The video signal of the channel tuned by the first tuner 16 is processed as a main picture signal, and the video signal of the channel tuned by the second tuner 20 is processed as a sub picture signal to be output to the CRT apparatus 30. do.

The process of receiving an image output from an external video device and displaying it as a sub-screen is also applied to the PIP processing unit 24 and compressed to the size of the sub-screen so that the main screen is processed by the PIP switching output unit 26 by the image processing unit 28. Overlaid and output.

However, in the case of digital television, the image is processed by the digital processing method for the input image, so that the still image or the zoom function of the image screen is applied so that the user can zoom in and view the screen when the user selects the zoom function. Support.

However, such a zoom function is only applied to the main screen and is not provided in the sub-picture by the PIP mode, and the sub-screen is always defined and watched at a constant size. In case of input, the user had to change the main screen and the sub-screen or turn off the PIP mode and switch to the main screen to watch.

The present invention has been made to solve the above problems, and an object of the present invention is to input a specific video screen desired by the user on the sub-screen when watching the PIP mode on a television capable of displaying the main screen and sub-screen in the PIP mode. If necessary, the present invention provides a sub-screen size and zoom control apparatus and a method for controlling a sub-screen size and zoom to overcome limited viewing due to the sub-screen size.

The sub-picture size and zoom control apparatus of the present invention for realizing the above object comprises a first image IF processor for IF converting a video signal component of a channel tuned in a first tuner, and a tuner tuned in a second tuner. A second video IF processor for IF converting the video signal components of the channel, a PIP processor and a PIP switching output unit for processing and outputting a video IF signal of the second video IF processor as a sub picture signal in the PIP mode, and a first video In a television having an image processing unit for mixing a video IF signal and a PIP sub-picture signal of an IF processing unit to be displayed in a PIP mode on a CRT device, a luminance signal separation for receiving a sub-screen image signal and separating and outputting the luminance signal And an A / D converter for converting the luminance video screen output from the luminance signal separator into a digital video signal, and a digital video screen converted from the A / D converter into a digital video signal. And a comparison image storage unit for controlling and storing the image screen output from the luminance signal separation unit according to a user's selection to be stored in the comparison image storage unit, and the image screen input through the luminance signal separation unit and the image screen stored in the comparison image storage unit. And a control unit for controlling the size and zoom function of the sub-screen by comparing each other with each other, and a zoom data converting unit for enlarging the sub-screen image under the control of the controller and outputting the sub-screen image to the PIP switching output unit. do.

In the present invention, the input image input to the sub-screen is characterized in that it also includes a video signal of the external device.

In addition, the method for adjusting the sub-screen size and zoom of the television according to the present invention comprises the steps of selecting a comparison image for operating the automatic sub-screen size and zoom control mode, and separating and storing the luminance signal of the selected comparison image; When the PIP mode and the sub-screen size and zoom control mode are selected, separating the luminance signal from the video signal of the sub-screen input, comparing the video screen and the comparison image by the separated luminance signal, the comparison result And if the degree of coincidence is greater than or equal to the predetermined ratio, adjusting the size or zoom of the sub-screen according to the set value.

In the present invention, the size of the sub-screen is characterized in that the PIP processing is executed and adjusted in the PIP processing unit according to the enlargement ratio set by the user.

In addition, in the present invention, the zoom of the sub-screen is characterized in that the zoom data conversion unit to enlarge and convert the video screen according to the enlargement ratio set by the user.

In the present invention, the size or zoom of the sub-screen is maintained for a predetermined time.

In addition, in the present invention, a certain ratio is characterized in that 70%.

According to the present invention, when the user is simultaneously watching the main screen and the sub-screen in the PIP mode, the size of the sub-screen is automatically adjusted by a preset value when a user-specified video screen is output on the sub-screen. If the comparison image is selected to enlarge the video screen, the video screen is saved by the luminance signal of the selected comparison video, and the sub-screen is compared with the video screen by the luminance signal of the input sub-screen. Adjust the size of the screen or enlarge the video screen of the sub-screen will be output for a certain time.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and the same parts as in the conventional configuration using the same reference numerals and names.

2 is a block diagram showing a ring size and a zoom control device of a television according to the present invention.

As shown here, a first video IF processing unit 18 for IF converting the video signal components of the channel tuned by the first tuner 16 to display the main picture and the sub picture in the PIP mode, and the second picture. The second video IF processing unit 22 for IF converting the video signal components of the channel selected by the tuner 20 and the video IF signal of the second video IF processing unit 22 are processed as sub-picture signals in the PIP mode and outputted. An image of the PIP processing unit 24 and the PIP switching output unit 26 and the video IF signal and the PIP sub-screen signal of the first video IF processing unit 18 to be displayed in the PIP mode on the CRT device 30 In a television having a processing unit 28, a luminance signal separation unit 32 for receiving a sub-screen image signal and separating and outputting a luminance signal and a luminance image screen output from the luminance signal separation unit 32 are digitally displayed. A / D converter 34 for converting to a video signal, and A / D converter 34 is converted into a digital video signal Comparative image storage unit 36 for storing the digital image screen, and control to store the image screen output from the luminance signal separation unit 32 in the comparison image storage unit 36 according to the user's selection and separate the luminance signal The control unit 12 and the control unit 12 for controlling the size and zoom function of the sub-screen by judging similarity by comparing the video screen input through the unit 32 and the video screen stored in the comparison image storage unit 36 with each other; And a zoom data converter 38 for enlarging the sub-screen image and outputting the sub-screen image to the PIP switching output unit 26.

In the present invention, the image screen using the luminance signal from which the color signal is removed from the image signal is used to determine the overall shape of the image screen.

In addition, the input image input to the sub-screen may be input of a video signal of an external device (not shown) in addition to the video signal received through the second tuner 20.

Accordingly, the luminance signal separation unit 32 separates the luminance signal and the color signal to remove the color signal, converts only the luminance signal into a digital signal through the A / D converter 34, and stores the luminance signal in the comparison image storage unit 36. After comparing the image screen stored in the comparison image storage unit 36 and the input image screen with each other and similar to each other, the PIP processing unit 24 performs the PIP process according to the enlargement ratio set by the user so that the PIP process is adjusted. In order to control the zoom of the sub-screen, the zoom data converter 38 enlarges and converts the video screen according to the enlargement ratio set by the user.

In addition, when the user selects the sub-screen image through the remote controller 10, the storing operation for the comparison image is performed by comparing the image signal separated by the luminance signal separation unit 32 from the control unit 12 with the comparison image storage unit 36. This can be done by controlling the data to be stored in the.

This will be described in detail with reference to a flowchart for describing a sub-screen size and a zoom adjusting method of the television illustrated in FIG. 3.

First, the user selects a comparison image for operating the automatic resizing and zooming of the sub-screen (S10).

At this time, the user selects whether to adjust the size of the subscreen or enlarge the video screen of the subscreen, and when the screen is enlarged, not only the enlargement area is designated but also the maintenance time when the subscreen is automatically adjusted and the zoom is adjusted. Will be set.

Then, the luminance signal separation unit 32 separates the luminance signal and the color signal for the selected comparison image input to the sub-screen, removes the color signal, and converts the comparison image into a digital signal by the A / D converter 34. The image is stored in the comparison image storage unit 36 (S12) (S14).

It is then determined whether the PIP mode is in operation (S16). The present invention is applied only while the PIP mode is executed as the sub-screen size and zoom control device.

Thus, when the PIP mode is in operation, it is determined whether the sub picture size and the zoom auto adjustment mode are selected and operated (S18).

When the automatic adjustment mode is selected, the luminance signal is separated from the image signal of the sub-screen input through the luminance signal separation unit 32 to be compared with the comparison image stored in the comparison image storage unit 36 while removing the color signal. (S20) (S22).

In this case, when the degree of agreement between the input image and the comparison image is 70% or more, it is determined that they are similar to each other and the sub-screen is adjusted or the image screen inputted as the sub-screen is enlarged and output (S24) (S26).

That is, when the input image and the comparison image are similar to each other, when the sub-screen is set to adjust the size of the sub-screen, the PIP processing unit 24 outputs data on the sub-screen size to adjust the compression ratio of the input image to adjust the PIP switching output unit. By being selected at (26), the image processing unit 28 is displayed as a sub-screen adjusted to the main screen and adjusted in size (S28).

At this time, by reducing the size of the sub-screen to remove it can be implemented to save the harmful video screen as a comparative image and to remove the sub-screen when watching with children.

On the other hand, when the input image and the comparison image are similar to each other, when the image screen outputted as the sub-screen is set to enlarge the data according to the zoom position and the magnification ratio with respect to the video screen input through the zoom data conversion unit 38 By converting the image to be selected by the PIP switching output unit 26, the image processor 28 is displayed on the sub-screen and enlarged on the sub-screen (S30).

As such, the input image and the comparison image are similar, and the size or zoom of the sub-screen is automatically adjusted so that the input image is maintained as the sub-screen for a predetermined time and then returned to its original state (S32) (S34).

Then, when the same image screen is input again by comparing the input image with the comparison image, the size or zoom of the subscreen is repeatedly adjusted.

As described above, the present invention automatically adjusts the size and zoom of the sub-screen when a specific video screen desired by the user is input to the sub-screen when watching the PIP mode on a television capable of displaying the main screen and the sub-screen in the PIP mode. There is an advantage to overcome the limited viewing due to the size of the sub-screen.

In addition, when the harmful screen is input to the image input to the sub-screen, by removing the sub-screen there is an advantage that can watch a healthy television with the children.

Claims (7)

 A first video IF processor for IF converting the video signal components of the channel tuned in the first tuner, a second video IF processor for IF converting the video signal components of the channel tuned in the second tuner, and a second video IF A PIP processing unit and a PIP switching output unit which processes and outputs an image IF signal of the processing unit as a sub picture signal in the PIP mode, and processes the image IF signal and the PIP sub picture signal of the first image IF processing unit into the PIP mode. In a television having an image processing unit for displaying, A luminance signal separation unit for receiving a sub-screen image signal and separating and outputting the luminance signal; An A / D converter for converting the luminance image screen output from the luminance signal separator into a digital image signal; A comparison image storage unit for storing a digital image screen converted into a digital image signal by the A / D converter; According to the user's selection, the control unit stores the video screen output from the brightness signal separating unit to the comparison image storage unit and compares the video screen input through the brightness signal separating unit with the video screen stored in the comparison image storage unit. A control unit for controlling the size and zooming function of the sub-screen by determining similarity; A zoom data converter which enlarges a sub-screen image and outputs the sub-screen image to the PIP switching output unit under the control of the controller. Sub-screen size and zoom control device of the television, characterized in that further comprises. The apparatus of claim 1, wherein the input image input to the sub-screen includes a video signal of an external device. Selecting a comparison image for operating the automatic sub-screen size and zoom control mode; Separating and storing the luminance signal of the selected comparison image; Separating the luminance signal from the video signal of the sub-screen input when the PIP mode, the sub-screen size and the zoom control mode are selected; Comparing the image screen and the comparison image by the luminance signal separated from the above; Adjusting the size or zoom of the sub-screen according to the set value if the comparison image and the degree of agreement are above a certain ratio. How to adjust the sub-screen size and zoom of the television, characterized in that consisting of. The method of claim 3, wherein the size of the sub-screen is adjusted by performing a PIP process in the PIP processing unit according to an enlargement ratio set by the user. The sub-screen size and zoom control method of claim 3, wherein the zoom of the sub-screen is performed by enlarging and outputting the video screen by the zoom data converter according to an enlargement ratio set by the user. 4. The method of claim 3, wherein the size or zoom of the sub-screen is maintained for a predetermined time. The method of claim 3, wherein the predetermined ratio is 70%.

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