KR100239482B1 - Graphic data resizing device - Google Patents

Abstract

The graphic data resizing apparatus in the disc reproducing apparatus comprises: first synthesizing means for overlaying and combining the decoded digital video data and the graphic data reproduced on the disc; Converting means for converting the synthesized data into a size of the same screen as that of the display unit and overlaying the sub picture data reproduced on the disc and displaying the synthesized data on the display unit; The output from the converting means and the sub picture data reproduced on the disc are overlaid and displayed on the display unit, and a separate resizing device for graphic data for video overlay is not required. And resizing MPEG videos simultaneously and displaying them on a display device, eliminating the need for CPU-assisted tasks such as sizing for video overlay to match aspect ratio and position with digital video data played from a disc. This reduces the burden on the CPU and increases the processing speed.

Description

Graphic Data Resizing Device

The present invention relates to a disc reproducing apparatus, and more particularly, to a graphic data resizing apparatus for a disc on which graphic data is recorded.

In general, commercialization of the DVD series is being progressed as other new playback media such as DVD (Digital Video Disc) players mainly used for A / V and DVD-ROM mainly used in PC.

In response to the DVD player, in recent years, an interactive DVD player (DVD-S (Digital Video Disc Screper)) has been developed, not merely for A / V viewing.

Such a playback device is being developed for the purpose of presentation, education, etc. as well as the existing DVD-P role.

In addition, such a DVD player compresses and uses image data, and currently uses data compressed by a standard called MPEG2.

This data is detected by the optical pickup and decoded by the decoding device and then displayed on the display device for viewing by the user.

The DVD player has a storage structure of data segmented and layered in a disc. Audio data, video data, and sub-picture data, etc., are recorded in a pack form together with information for playback and reproduced. Watching.

Such a device reproduces the data recorded on the disc and displays it on the display device. There are two types of aspect ratios of the present display device: 16: 9 and 4: 3.

Therefore, in order to display the image data reproduced on the disc on the display device, the correct viewing of the user is achieved only by matching the aspect ratio of the display screen with that of the display device.

The determination of the aspect ratio of the image data recorded on the disc is up to the title producer. In other words, the software maker is determined at the time of producing the image and it depends on how the title maker records the produced image on the disc.

Therefore, in order to display the image data recorded in 16: 9 on a display device having an aspect ratio of 4: 3, the display device converts the image in an aspect ratio of 16: 9 to an appropriate aspect in view of the 4: 3 aspect ratio.

This change in screen size and ratio is called a resizer.

Hereinafter, a description will be given with reference to FIGS. 1 and 2.

FIG. 1 is a view showing an example of a method of displaying a 16: 9 picture on a 4: 3 display device in a disc reproducing apparatus, and FIG. 2 shows a reproduction of a 16: 9 MPEG picture and a sub picture in a disc reproducing apparatus. A diagram showing an example of a method of displaying on three screens.

First, as shown in FIG. 1, a method of displaying image data recorded in 16: 9 on a display device having a 4: 3 screen size is performed by converting the 16: 9 screen to 4: 3 and displaying the screen. A method of cutting and displaying left and right regions is illustrated in FIG. 1B.

In addition, there is a method of displaying 16: 9 image data on a 4: 3 screen as it is but displaying the same as a 16: 9 screen by compressing the upper and lower screen areas of the 4: 3 screen.

Meanwhile, FIG. 2 shows an example of synthesizing and displaying video data at 16: 9 and displaying the video data and the sub picture data when the sub picture data is reproduced.

As shown in FIG. 2, it can be seen that MPEG video data is resized according to the aspect ratio of the display device, while sub-picture data is displayed while being partially cut unless any manipulation corresponding to the resizing device is performed.

Of course, in order to solve such a problem, the DVD standard allows recording of a plurality of subpictures to be used according to various aspect ratios at the time of subpicture data.

That is, each data according to various display modes displayed by the display device is recorded on the disc, and the screen of the sub picture having an appropriate aspect ratio is decoded and displayed. The display mode is made to be set by the user.

There are many characteristics of such a subpicture. Up to 32 subpictures can be recorded, and corresponding languages can be displayed for display in multiple countries, and as described above, recording can be performed according to the screen size.

This will be a schematic system including a resizer of the DVDP according to the prior art.

FIG. 3 is a schematic system diagram including a resizer of a DVDP according to the prior art, and FIG. 4 is a view showing one format of representative types of data recorded on a disc of the DVDP according to the prior art.

First, the configuration thereof will be described with reference to FIG. 3. The disk 10, the first decoding unit 11, the converter 12, the second decoding unit 14, the control unit 13, the synthesis unit 15, and the display It is composed of a section (16).

The first decoding unit 11 detects only MPEG video data recorded on the disc 10, decodes only the detected MPEG video data, and outputs the detected MPEG video data to the conversion unit 12.

The second decoding unit 14 detects only the sub picture data among the data recorded on the disc 10, decodes only the detected sub picture data, and outputs the detected sub picture data to the combining unit 15.

In this case, the decoding data output from the second decoding unit 14 to the combining unit 15 outputs data having the same aspect ratio as the display unit 16 according to the aspect ratio conversion control signal provided from the control unit 13. .

That is, the aspect ratio of the sub picture data output from the second decoding unit 14 is selected and decoded as a sub picture having the same aspect ratio as the aspect ratio converted by the converter 12.

The converting unit 12 converts the MPEG video data into the same aspect ratio as the aspect ratio of the display unit 16 according to the aspect ratio conversion control signal of the control unit 13 and applies it to the combining unit 12.

That is, the display unit 16 is converted to the same aspect ratio that can be displayed normally on the display unit 16.

The converted MPEG video data and the sub picture data are synthesized by the synthesis unit 15 and displayed on the display unit 16.

In this case, the aspect ratio conversion signal is provided by the controller 13 according to a key input signal of the user, that is, the aspect ratio selection signal of the user.

Here, the recording format according to the type of representative data recorded on the conventional disk 10 is an audio data storage area for storing audio data and a video data storage area for storing only video data and sub picture data only as shown in FIG. It is divided into sub picture storage areas.

Disc reproducing apparatus according to the prior art is a display method according to the DVD standard between the 16: 9 image information and 4: 3 display of the DVD, the normal (Pan & Scan), the Letter Box method Therefore, since the size and aspect ratio of the DVD video information change, accurate positioning and combination use of the reproduced MPEG data video and the sub picture data is solved by recording several sub picture data. When the graphic data other than the picture data is additionally provided to the screen, there is a problem in that an auxiliary work for adjusting the size and aspect ratio of the graphic screen according to the various display methods described above is required.

As an example of such an auxiliary operation, a function of resizing the graphic screen may be performed in the CPU, but this causes a problem of an increase in the burden on the CPU and a decrease in the processing speed of the CPU.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems according to the prior art, and an object of the present invention is to reproduce and display graphic data recorded on a disc so that the display device can be converted to fit the aspect ratio of the display device. An object of the present invention is to provide a graphic data resizing apparatus.

Another object of the present invention is to provide a graphic data resizing apparatus for resizing at the same time as a resizing apparatus and displaying them on a display apparatus.

In addition, another object of the present invention is to display digital video data and graphics data reproduced from a disc so that they are resized by dedicated resizers instead of resizing them on the CPU to prevent an increase in CPU burden and a decrease in processing speed. It is to provide a resizing device for graphic data.

1 is a diagram showing an example of a method of displaying a 16: 9 screen in a disc playback device on a 4: 3 display device.

2 is a diagram showing an example of a method of reproducing a 16: 9 MPEG picture and a sub picture in a disc reproducing apparatus and displaying the picture on a 4: 3 picture;

3 is a schematic system diagram including a resizer of a DVDP according to the prior art.

4 is a diagram showing the concept of the types and types of typical data recorded on a disc of a DVDP according to the prior art.

Fig. 5 is a diagram showing a graphic data resizing apparatus in the disc reproducing apparatus according to the first embodiment of the present invention.

6 is a diagram showing the concept of a representative type of data and a recording form recorded on a disc according to the present invention.

7 is a diagram illustrating an example of an application displayed on one display unit by the graphic data size converting apparatus according to the present invention.

Fig. 8 shows a dedicated resizing device for processing graphic data in the disc reproducing apparatus according to the second embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

20, 30: control unit 21, 31: disk

22, 32: storage unit 23, 26, 34, 37: decoding unit

24, 27, 36, 38: synthesis section 25, 33, 35: conversion section

28, 39: display unit

A feature of the graphic data resizing apparatus in a disc reproducing apparatus according to the present invention is that the first converting means for adjusting the screen size of the graphic data among the data reproduced on the medium on which the digital signal is recorded is adapted to adjust the screen size of the MPEG video data. 2 It is characterized by synthesizing data before the conversion means so that it can be shared with the conversion means.

That is, the present invention is characterized in that it comprises conversion means for converting the screen size at the same time after alpha blending the MPEG video data and the graphic data reproduced on the disc.

A further aspect of the present invention provides a disc reproducing apparatus comprising: first synthesizing means for overlaying and combining decoded digital video data and graphic data reproduced on the disc; And converting means for converting the synthesized data into the same screen size as that of the display unit and overlaying the sub picture data reproduced on the disc to display the display unit on the display unit.

A still further aspect of the present invention provides a disc reproducing apparatus having a display section, comprising: first conversion means for resizing graphic data reproduced on the disc to a format having the same screen size as that of the display section; Second converting means for converting the digital video data reproduced from the disk into a format having the same screen size as that of the display unit; And synthesizing means for overlaying the converted digital video data, the graphic data, and the sub picture data reproduced on the disk on the display unit.

Hereinafter, a graphic data resizing apparatus in a disc reproducing apparatus according to the present invention will be described with reference to the accompanying drawings for each embodiment.

[First Embodiment]

FIG. 5 is a diagram showing a graphic data size converting apparatus in the disc reproducing apparatus according to the first embodiment of the present invention, and FIG. 6 is a diagram showing one format showing the type of representative data recorded on the disc according to the present invention. 7 is a diagram illustrating an example of an application displayed on one display unit by the graphic data size converting apparatus according to the present invention.

Referring to FIG. 5, the disc 21, the storage unit 22, the first and second decoding units 23 and 26, the first and second combining units 24 and 27, and the conversion unit 25 are described. And a display unit 28.

The first decoding unit 23 extracts the digital data (MPEG video image data) recorded in the disc 21, decodes the extracted digital data into a format that can be displayed, and sends the same to the first synthesis unit 24. Output

The second decoding unit 26 extracts the subpicture data recorded in the disc 21, decodes the extracted subpicture data to be displayed on the display unit 28, and sends the decoded subpicture data to the second combining unit 27. Output

At this time, the sub picture data decoded and output by the second decoding unit 26 may come out to match the size and position of the MPEG video image according to the screen size conversion (resizing) control signal of the control unit 20.

The storage unit 22 extracts only the graphic data reproduced from the disc 21, stores the extracted graphic data, and outputs the extracted graphic data to the first synthesizing unit 24 according to the output control signal of the control unit 20.

The first synthesizing unit 24 is a graphic output from the first decoding unit 23 to the digital data decoded and output, that is, MPEG moving image data from the storage unit 22 according to one output control signal of the control unit 20. The data is overlaid by alpha blending (α-Blending) to output the two overlayed data to the converter 25.

The converting unit 25 resizes the synthesized data to a screen having the same size as that of the screen of the display unit 28 and outputs the same to the second synthesizing unit 27.

In this case, when the screen size of the display unit 28 is 4: 3 and the format of the data recorded on the disc is recorded with the screen size set to 16: 9, the conversion unit 25 displays the display unit 28. A screen size of ie, a screen size of 4: 3 is converted into a screen size of data overlaid by the first combining unit 24.

The second synthesizing unit 27 performs alpha blending on the digital image data output from the converting unit 25 and the data overlaid on the graphic data and the sub picture data output from the second decoding unit 26 as described above. The overlayed data is displayed on the display unit 28 as shown in FIG. 7.

In this case, the screen size of the data output from the second decoding unit 26 and the screen size of the data output from the conversion unit 25 have the same screen size.

Therefore, the screen size of the data output from the second combining unit 27 is the same as the screen size of the display unit 28 is displayed.

As shown in FIG. 7, the area of the MPEG data and the area of the graphic data can be arbitrarily set by the user depending on how the application is processed during playback.

As shown in FIG. 6, representative types of data recorded on the disc (DVD-S) of the present invention include audio areas in which audio data is stored, video areas in which video data is stored, sub-pitched storage areas in which sub pictures are stored, and graphic data. It is divided into a stored graphic data area and a control area for storing a signal for controlling an application when displaying the data.

Briefly explaining the main operation of the present embodiment, the first decoding unit 23 performs an overlay of graphic data at the front of the converting unit 25 after the MPEG decoding, so that no matter how the MPEG image of the disc 21 is resized, the overlay The graphic picture for the video is to fit with the MPEG video.

Second Embodiment

FIG. 8 is a diagram showing a case where the disc reproducing apparatus according to the second embodiment of the present invention is employed exclusively for the graphic data size converting apparatus. The same components as those in the first embodiment of FIG. 5 will be described. It will be omitted.

Looking at the configuration with reference to Figure 8, the first conversion unit 33 for converting the format of the graphic data output from the storage unit 32 to the same size as the screen size of the display unit 39; A second converter 35 for converting the MPEG video data output from the first decoder 34 into a format having the same size as the screen size of the display 39; A first synthesizing unit 36 for synthesizing the two data by overlaying the converted graphic data and the MPEG video data with an alpha branding method; The two data overlayed by the first synthesizer 36 and the sub picture data decoded by the second decoder 37 and converted into the same format as the screen size of the display 39 are overlaid by alpha branding. The second synthesis unit 38 is configured by adding.

In conclusion, the main difference between the present embodiment and the first embodiment is that, unlike the first embodiment, graphic data is first resized and then overlayed with the resized MPEG video data.

Then, the sub picture data is directly overlaid on the overlayed and synthesized data and displayed on the display unit 39.

In other words, when it is not necessary to be sized like an MPEG image, overlay is possible after selectively resizing graphic data.

The graphic data resizing apparatus in the disc playback apparatus according to the present invention reproduces graphic data recorded on a disc and converts the graphic data to match the aspect ratio of the display apparatus when displaying on a display device. There is an advantage in that it can be used for presentation or educational purposes.

In addition, since a single resizing device simultaneously resizes graphics and MPEG videos and displays them on a display device, there is no need for a separate resizing device for graphic data, thereby eliminating the need for auxiliary work.

In addition, the digital video data and the graphic data reproduced from the disc are resized in each dedicated resizer instead of being resized in the CPU, thereby displaying and reducing the burden on the CPU and increasing the processing speed.

Claims (5)

1. A disc reproducing apparatus having a display section, comprising: first synthesizing means for overlaying decoded digital video data and graphic data reproduced on the disc to synthesize them; Conversion means for simultaneously resizing the digital video data and the graphic data and converting the synthesized data into the same screen size as that of the display unit according to the screen size of the display unit to overlay sub-picture data reproduced on a disc to display on the display unit; Graphic data resizing apparatus characterized in that it comprises a. The graphic data resizing apparatus according to claim 1, further comprising a storage unit for storing graphic data reproduced on the disk and outputting the graphic data to the first synthesizing unit according to a control signal. A disc reproducing apparatus having a display section, comprising: first converting means for resizing graphic data reproduced on the disc into a format having a screen size equal to a screen size of the display section; Second conversion means for converting the digital video data reproduced from the disc into a format having the same screen size as that of the display unit; And synthesizing means for overlaying the converted digital video data, the graphic data, and the sub picture data reproduced on the disc to display on the display unit. The apparatus of claim 3, wherein the synthesizing unit comprises: a first synthesizing unit configured to overlay the graphic data and the digital image data converted by the first and second converting units to overlay each other; And a second synthesizing unit which overlays the synthesized data and the sub picture data reproduced on the disc and displays the display unit on the display unit. 4. The graphic data resizing apparatus according to claim 3, further comprising a storage unit for storing the graphic data reproduced on the disk and outputting the graphic data to the first converting means according to a control signal.