KR100546599B1 - Apparatus for Processing Twin Picture of Projector - Google Patents

Abstract

It is related to the twin picture processing device of the projector that the sub picture size is constant and main / sub picture switching is possible, and the volume of the product can be reduced regardless of the resolution of the input image. The video decoder, the deinterlacer, the video processor, It consists of a first and a second A / D converter, a DVI receiver, a scaling unit, and a CPU, and uses only one scaler so that two different image data are commonly input to the main picture path and the sub picture path, and optionally processed. Therefore, the screen size of the sub-screen can be consistently adjusted, main screen / sub-screen switching is possible, and cost can be reduced as well as the volume of the product.

Projector / Twin Picture / Scaler

Description

Apparatus for Processing Twin Picture of Projector}

1 is a block diagram showing the configuration of a twin picture processing apparatus for a projector according to the prior art;

FIG. 2 is a block diagram illustrating a configuration of the first and second scaling units of FIG. 1.

3 is a block diagram showing the configuration of a twin picture processing apparatus for a projector according to the present invention;

4 is a block diagram illustrating a configuration of the scaling unit of FIG. 3.

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

31: video decoder 32: deinterlacer

33: video processor 34: first A / D converter

35: 2nd A / D converter 36: DVI receiver

37: scaling unit 38: memory

39: display unit

40: CPU

The present invention relates to a projector, and more particularly, to a twin picture processing apparatus of a projector.

With the development of video display devices, products that can display various video signal inputs are being used. Especially, as the video screen is enlarged, two or more such as twin picture or picture in picture (PIP) can be adapted to user's needs. Products that can display video signal input at the same time are widely used.

In particular, in the case of a projector, it is possible to receive both a PC (Personal Computer) signal and an analog and digital TV broadcast signal, and to process two or more of them and display them through a display element such as an LCD in the form of a twin picture. Therefore, it is attracting attention as a large-capacity video device.

The configuration of the twin picture processing apparatus of such a projector is shown in FIG.

Referring to FIG. 1, a video decoder 11 that receives a Composite Video Blanking Signal (CVBS), SY / C, and Component 480i image data and decodes it into a Y / C signal, the video decoder 11 Deinterlacer (12) for converting the output of the video to Y / U / V image data, component 480p (Y / Pr / Pb), A / D for converting the analog DVI image data to 24-bit RGB image data The converter 13 receives a DVI signal, converts the digital DVI signal into 24-bit RGB image data, and outputs the image data output from the DVI receiver 14 and the A / D converter 13 to the first memory 16. Read / write to the first scaling unit 15 for adjusting the horizontal and vertical size and outputting the image data for the main screen, the output of the deinterlacer 12 and the output of the A / D converter 13 Read / write to memory 18 to adjust horizontal and vertical size to sub-picture image data The second scaling unit 17 outputs the twin picture image data mixed with the output of the first scaling unit 15 to the display unit 19, and the first scaling unit according to the user's main / sub picture selection. And a CPU 20 that controls the second scaling unit 17.

In this case, the first scaling unit 15 and the second scaling unit 17 have the same configuration except that the input signal is different, as shown in FIG. 2, the graphic port 21, the video port 22, and the graphic. Vertical scaler 23 for adjusting the vertical size of the image data input through the port 21 and the video port 22, horizontal scaler 24 for adjusting the horizontal size of the image data output from the vertical scaler 23 And a color matrix 25 that combines and outputs the output of the horizontal scaler 24.

Referring to the operation of the prior art configured as described above is as follows.

The CVBS, SY / C, and component 480i image data are input to the second scaling unit 17 through the video decoder 11 and the deinterlacer 12, and the vertical and horizontal sizes are adjusted according to the control of the CPU 20 and displayed. Displayed via section 19. In addition, the component 480p and the DTV RGB image data are input to the second scaling unit 17 through the A / D converter 13, and the vertical and horizontal sizes are adjusted under the control of the CPU 20, and then the display unit 19 is used. The sub screen is displayed.

Meanwhile, analog DVI and digital DVI image data are input to the first scaling unit 15 through the A / D converter 13 and the DVI receiver 14, respectively, and the vertical and horizontal sizes are adjusted under the control of the CPU 20. The main screen is displayed on the display unit 19.

As described above, the twin picture processing apparatus according to the related art includes a first scaling unit 15 for horizontal and vertical size adjustment of an image for a main screen in order to simultaneously display two input signals on one screen. Two scaling units are used, such as a second scaling unit 17 that adjusts the horizontal and vertical sizes of the screen image to mix with the output of the first scaling unit 15.

Therefore, the CVBS, SY / C, component 480i, component 480p, and DTV RGB inputs can only be displayed as sub-screens through the first scaling unit 15, and analog DVI and digital DVI are mainly displayed through the second scaling unit 17. Can only be displayed on the screen.

The twin picture processing apparatus of the projector according to the prior art has the following problems.

First, since the main screen dedicated first scaling unit and the sub screen dedicated second scaling unit are used, the screen size of the twin picture cannot be constantly adjusted to a predetermined value according to the resolution of the input signal.

Second, CVBS, SY / C, component 480i, component 480p, and DTV RGB inputs can be displayed only on the sub-screen while analog DVI and digital DVI can be displayed on the main screen only. impossible.                         

Third, a projector with a small size of a printed circuit board (PCB) has too little space to use more than one scaler IC.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and the sub-screen size is constant regardless of the resolution of the input image, the main screen / sub-screen switching is possible, it is possible to reduce the volume of the product of the projector It is an object of the present invention to provide a twin picture processing apparatus.

A twin picture processing apparatus for a projector according to the present invention includes a video decoder for receiving CVBS, SY / C, and component 480i image data and decoding the Y / C signal, and converting the output of the video decoder to Y / U / V image data. A deinterlacer, a video processor for converting component 480p (Y / Pr / Pb) image data into analog RGB image data, a first A / D converter for converting the output of the video processor and DTV RGB image data to digital RGB image data; A second A / D converter for converting analog DVI image data (RGB) to digital RGB image data, a DVI receiver for receiving digital DVI image data (RGB), a deinterlacer, a first A / D converter, and a second A At least two of the outputs of the / D converter and the DVI receiver are input and read / write to the memory to adjust the horizontal size of the sub-screen image data and the main screen image data. And a scaling unit for output to the display by mixing the myeonyong image data and the image data for the main screen, characterized in that it comprises a CPU which controls the scaling unit according to a user's main screen / Subpicture selection.

Hereinafter, a preferred embodiment of a twin picture processing apparatus for a projector according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing the configuration of the twin picture processing apparatus of the projector according to the present invention, Figure 4 is a block diagram showing the configuration of the scaling unit of FIG.

As illustrated in FIG. 3, a twin picture processing apparatus of a projector according to the present invention receives a CVBS (Composite Video Blanking Signal), SY / C, and Component 480i image data and decodes the Y / C signal into a video decoder. 31, a deinterlacer 32 for converting the output of the video decoder 31 to Y / U / V image data, and converting component 480p (Y / Pr / Pb) image data to analog RGB image data. A video processor 33, a first A / D converter 34 for converting the output of the video processor 33 and the DTV RGB image data into digital RGB image data, and converting the analog DVI image data (RGB) into digital RGB image data. A second A / D converter 35 for converting the data into a second, a DVI receiver 36 for receiving digital DVI image data (RGB), the deinterlacer 32, a first A / D converter 34, and a second A / D At least two of the outputs of the converter 35 and the DVI receiver 36 are received and received. Read / write to the sub-image 38 to adjust the horizontal size of the sub-screen image data and the main screen image data, and mix the sub-screen image data and the main screen image data and output them to the display unit 39. And a CPU 40 for controlling the scaling unit 37 according to the user's main screen / subscreen selection.

At this time, the scaling unit 37 receives the 24-bit digital RGB image data and converts it into 48-bit dual pixel RGB image data. The video port 41 and the graphics port 42, the video port 41 and A vertical scaler 43 for adjusting the vertical size of the sub-screen image data output from any one of the graphic ports 42 and a first scale for adjusting the horizontal size of the sub-screen image data output from the vertical scaler 43 A second horizontal scaler 45 and a first horizontal scaler 44 for adjusting a horizontal size of the main screen image data output from any one of the horizontal scaler 44, the video port 41, and the graphic port 42. ) And a color matrix 46 for multiplexing the 48-bit sub-screen RGB image data and the 48-bit main screen RGB image data output from the second horizontal scaler 45 and outputting them as 24-bit RGB image data. do.

Referring to the operation of the present invention configured as described above are as follows.

First, Composite Video Blanking Signal (CVBS), SY / C, and Component 480i image data are converted into Y / C image data through the video decoder 31, and converted into 24-bit digital RGB image data through the deinterlacer 32. It is input to the scaling unit 37.

The component 480i image data is converted into analog RGB image data through the video processor 33, and converted into 24-bit digital RGB image data through the first A / D converter 34 and input to the scaling unit 37.

The DTV RGB image data is converted into 24-bit digital RGB image data through the first A / D converter 34 and input to the scaling unit 37.

The analog RGB image data according to the analog DVI format is converted into 24-bit digital RGB image data through the second A / D converter 35 and input to the scaling unit 37.

The digital RGB image data according to the digital DVI format is decoded through the DVI receiver 36 and input to the scaling unit 37.

At this time, one of the CVBS, SY / C, component 480i, component 480p, and DTV RGB image data is selected as one of the main picture or sub picture, and one of the RGB image data according to analog and digital DVI standard is selected as one of the main picture and sub picture. Is selected.

For example, when one of the CVBS, SY / C, component 480i, component 480p, and DTV RGB image data is selected as the main screen, one of the RGB image data according to the analog and digital DVI standards may be selected as the subscreen. .

On the contrary, when one of the CVBS, S-Y / C, component 480i, component 480p, and DTV RGB image data is selected as the sub picture, one of the RGB image data according to the analog and digital DVI standards may be selected as the main picture.

Therefore, if the user selects the twin picture function with CVBS as the main screen and digital DVI as the sub picture, the video port 41 of the scaling unit 37 converts the input 24-bit digital RGB image data into 48-bit digital RGB image data. The digital port 42 converts the input 24-bit digital RGB image data into 48-bit digital RGB image data and outputs it to the vertical scaler 43.

Subsequently, the second horizontal scaler 45 adjusts the horizontal size of the input RGB image data to output the color matrix 46.

At this time, the horizontal size adjustment is made of a predetermined value at the initial stage of the initial twin picture function, and is made to fit the adjustment value when the user adjusts.

Meanwhile, the vertical scaler 43 adjusts the vertical size of the input RGB image data to the first horizontal scaler 44, and the first horizontal scaler 44 adjusts the horizontal size of the input image data to adjust the color matrix. Output to (46).

In this case, the vertical and horizontal size adjustments are made to the preset values at the beginning of the twin picture function, and are made to fit the adjustment values when the user adjusts them.

In addition, the color matrix 46 multiplexes the 48-bit sub-screen RGB image data output from the first horizontal scaler 44 and the 48-bit main screen RGB image data output from the second horizontal scaler 45. By outputting to the display unit 39 as RGB image data, a twin picture image is reproduced.

As a result, in the present invention, the second horizontal scaler 45 is placed on the main screen processing side in one scaling unit 37 to enable horizontal size adjustment, and the vertical scaler 43 and the first horizontal scaler are located on the sub-screen processing side. By setting 44 so that the vertical and horizontal size can be adjusted, the screen size of the sub-screen can be uniformly adjusted.

In addition, the output of the video port 41 can be common to the sub-screen vertical scaler 43 and the main screen second horizontal scaler 45, and the output of the graphics port 42 is also used for the sub-screen vertical scaler ( 43) and the second horizontal scaler 45 for the main screen, so that the main screen / sub-screen switching is possible unlike the prior art.

Twin picture processing apparatus of the projector according to the present invention has the following effects.

First, the size of the main screen and the sub-screen can be adjusted in one scaling unit so that the screen size of the sub-screen can be constantly adjusted regardless of the resolution of the input image.

Second, the output of the video port in the scaling unit can be commonly input to the vertical scaler for the sub-screen and the second horizontal scaler for the main screen, and the output of the graphics port is also provided to the vertical scaler for the sub-screen and the second horizontal scaler for the main screen. Main screen / sub screen switching is possible because it allows to enter in common.

Third, since only one scaling unit is used, cost reduction and product volume can be reduced.

Claims (2)

A video decoder which receives CVBS, S-Y / C, and component 480i image data and decodes them into Y / C signals; A deinterlacer for converting the output of the video decoder into Y / U / V image data; A video processor for converting component 480p (Y / Pr / Pb) image data into analog RGB image data; A first A / D converter for converting the output of the video processor and the DTV RGB image data into digital RGB image data; A second A / D converter for converting analog DVI image data (RGB) into digital RGB image data; A DVI receiver for receiving digital DVI image data (RGB); At least two of the outputs of the deinterlacer, the first A / D converter, the second A / D converter, and the DVI receiver are input and read / write to a memory so that the horizontal size of the sub-screen image data and the main screen image data A scaling unit which adjusts and mixes the sub-screen image data and the main screen image data and outputs them to a display unit; And And a CPU for controlling the scaling unit according to a user's main / subscreen selection. According to claim 1, The scaling unit receives a 24-bit digital RGB image data, respectively, a video port and a graphics port for converting and outputting 48-bit dual pixel RGB image data; A vertical scaler for adjusting a vertical size of the sub-screen image data output from any one of the video port and the graphic port; A first horizontal scaler for adjusting a horizontal size of the sub-screen image data output from the vertical scaler; A second horizontal scaler for adjusting a horizontal size of the main screen image data output from any one of the video port and the graphic port; And And a color matrix for multiplexing the 48-bit sub-screen RGB image data and the 48-bit main screen RGB image data output from the first horizontal scaler and the second horizontal scaler and outputting them as 24-bit RGB image data. Twin picture processing unit for projector.

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