JP2002044546A - Video processor and method for processing video - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video processor and a method for processing video that enable a display size and a position of a graphic image to be changed while keeping drawing contents of the graphic image displayed on a screen of a digital television receiver. SOLUTION: In the video processing using two systems of video size revision processing circuits or more, when there is a video size revision circuit not in use is one system or more, the graphic indication is processed not by a conventional rasterizer but by the video size revision processing circuit not in use to display the graphic image with an optional size at an optional position. Thus, the display size and the position of a graphic plane can be revised without revising contents drawn on the graphic plane and management information such as a layered state of a window and position information or the like at all.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video processing device provided in a television receiver, and more particularly to a video processing device for changing a display size and a position of a received video.

[0002]

2. Description of the Related Art In recent years, wide TV receivers having a screen aspect ratio of 16: 9 in landscape orientation have become widespread. Furthermore, a wide-screen television receiver having a dual-screen display function of simultaneously displaying desired two-channel video among video signals from a plurality of tuners and one or a plurality of external video signals input via an external signal input terminal. Has also been commercialized.

Further, an on-screen display (OSD) such as a channel number display and a volume display, an electronic program guide (E)
PG), character data and graphic data such as data broadcast programs are displayed on a television screen as graphic images via a graphic data generating unit.

FIG. 10 is a block diagram schematically showing a configuration of a video processing section of such a conventional television receiver. Vid
eo-1 and Video-2 are selected two of the video signals from one or more tuners and one or more external video signals input through an external signal input terminal.
This is a system video signal. These video signals Video-1
The aspect ratio, the size, and the display position of the Video and Video-2 images can be changed by the companding processing units 8 and 9. The companded video signal is synthesized by the adder 12. The graphic data generated by the graphic data generation unit 10 and temporarily stored in the internal memory is read by the rasterizer 11 in the main scanning direction and the sub-scanning direction. The adder 13 combines the synthesized image subjected to the expansion and compression process from the adder 12 and the graphic data from the rasterizer 11, and provides a combined video output signal Vout.

[0005]

Regarding the above-mentioned wide television receiver, for example, Japanese Patent Application Laid-Open No. H11-220676 discloses a technique for displaying all scanning lines of a wide image without distortion and displaying another image in a margin. Have been. or,
For TV receivers that display graphic images,
For example, Japanese Patent Application Laid-Open No. 9-93548 discloses a technique for displaying characters and graphic information transmitted on a data channel in a manner that is easy for a viewer to understand.

[0006] However, even in a system in which the display size and position of an image can be freely changed as in these prior arts, a graphic image is displayed within a limited range by changing the drawing content or by a simple dedicated processing circuit. The size and position have to be changed, and the display size and position cannot be freely changed while maintaining the drawing contents.

Accordingly, the present invention provides a video processing apparatus and a video processing method capable of freely changing the display size and position of a graphic image while maintaining the drawing contents of the graphic image displayed on the screen of a digital television receiver. The purpose is to provide.

[0008]

A video processing method according to the present invention provides a first video data providing step for providing video data constituting a first video, and video data constituting a second video. A second video data providing step, a graphic data generating step for generating graphic data constituting a still image, and a first image provided by the first or second video data providing step or the graphic data generating step A first compression / expansion step of compressing or expanding the image data in both vertical and horizontal directions or in one direction, and a first compression / expansion step different from the first provided by the first or second video data providing step or the graphic data generating step. A second companding step of compressing or expanding the two images in both vertical and horizontal directions or in one direction;
An image synthesizing step of synthesizing two images expanded by the first and second expansion steps.

Further, the video processing apparatus of the present invention includes a video data providing means for providing video data, a graphic data generating means for generating graphic data, and an image provided from the video data providing means or the graphic data generating means. And a companding means for compressing or expanding the image generated by the above in both vertical and horizontal directions or in one direction.

In the image processing using two or more video size change processing circuits, when not displaying one or more video images, the graphic display is not performed by a normal rasterizer, but is performed by one unused video size change processing circuit. , A graphic image can be displayed at an arbitrary size and an arbitrary position. Accordingly, the display size and position of the graphic data can be changed without changing any drawing information of the generated graphic data and management information such as a window hierarchical state and button position information necessary for generating the graphic data. .

The present invention is particularly effective in switching various display modes that are often used when displaying an image having an aspect ratio of 4: 3 on a television receiver having a screen aspect ratio of 16: 9.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram schematically showing the configuration of a video processing apparatus according to one embodiment of the present invention. The digital demodulator 2 demodulates an RF digital signal received via an antenna (not shown) or a cable, and converts the packetized digital signal TS1 to TSP (t
(ransport stream processor) 3. Also, this T
External digital equipment such as a personal computer (not shown) for SP3
, An external digital input signal TS2 is also input via the digital input terminal 1 and the switch SW1. These digital signals TS1 and TS2 include video, audio, and data signals, respectively. One of digital signals TS1 and TS2 is selected by switch SW1 and TSP
3 provided.

The TSP 3 extracts a video signal from a digital signal provided via the switch SW 1 and supplies the video signal to the MPEG decoder 4. The MPEG decoder 4 decodes a video signal provided from the TSP 3 and provides digital video data Video-1.

The analog tuner 5 demodulates an RF analog signal received via an antenna (not shown) or a cable, and provides an analog video signal AN1 to the A / D converter 7 via a switch SW2. This A / D converter 7
From an external analog device (not shown) via the analog input terminal 6 and the switch 2
Is also entered. One of the analog video signals AN1 and AN2 is selected by the switch SW2 and provided to the A / D converter 7. The A / D converter 7 A / D converts an analog video signal provided via the switch SW2, and provides digital video data Video-2. The provision of the digital video data Video-1 and Video-2 is performed under the control of a microcomputer or a system CPU (not shown) for controlling the present system.

The graphic data generator 10 generates one or more planes of graphic data under the control of the system CPU and provides the graphic data GR.

The video data Video is controlled by the switch SW3.
o-1, Video-2, and graphic data GR
One of them is selected and provided as image data to the companding processing unit 8. The companding unit 8 performs vertical and horizontal compression or expansion processing on the input image data, and sets a display position on the television screen.

FIGS. 2 to 5 are views for explaining the processing of the companding processing section 8. FIG. When an image having an aspect ratio of 4: 3 is displayed on a screen having an aspect ratio of 16: 9, the image becomes a horizontally widened image as shown in FIG. FIG. 2A shows 720
It is a screen of × 480 pixels. Since the aspect ratio of the number of pixels does not match the aspect ratio of 16: 9, the shape of one pixel is not square. The companding processing section 8 compresses the image as shown in FIG. 2A, for example, in the horizontal direction, and generates an image with the aspect ratio of the number of pixels being 4: 3 as shown in FIG. 2B. In this case, the horizontal resolution decreases from 720 to 540.

FIG. 3 shows a companding process without reducing the resolution. The companding processing unit 8 doubles the vertical and horizontal directions of the image in FIG. 3A to generate the image shown in FIG. This image is displayed on the television screen as shown in FIG. 2B by adjusting the deflection circuit in the subsequent stage. As a result, the resolution does not decrease.

The companding processing section 8 converts an image having an aspect ratio of 4: 3 as shown in FIG. 4A into an image having an aspect ratio of 16: 9 as shown in FIG. 4B. The image shown in FIG. 4B is slightly enlarged in the vertical direction with respect to the image shown in FIG. 4A, and the enlargement ratio increases in the horizontal direction nearer to both ends. Therefore, although the center of the image shown in FIG. 4B is hardly deformed, it is an image which spreads horizontally toward both right and left ends. Also, the companding processing section 8 converts the video as shown in FIG. 4A into an aspect ratio of 16: 9 as shown in FIG.
Convert to video. The image shown in FIG. 4C is shown in FIG.
With respect to the video, the central portion of the image is enlarged at the same magnification in the vertical and horizontal directions.

The companding unit 8 can compress the input video and display it on the upper right of the television screen, for example, as shown in FIG. The adder 12 in FIG. 1 processes the video data V as shown in FIG.
o1 and the video data Vo2 as shown in FIG. 5B processed by the companding processor 9 are combined to provide the video data Vo3 as shown in FIG. 5C. In the present embodiment, the companding processing unit 9 is described as having exactly the same configuration and function as the companding processing unit 8, but the performance and the like may be different.

By the switch SW4 shown in FIG. 1, one signal in the video data Video-1, Video-2 and the graphic data GR is selected and provided to the companding section 9 as an image signal. This graphic data GR is also provided to the rasterizer 11 via the switch SW5.

The rasterizer 11 scans a plurality of graphic data once stored in the internal memory provided from the graphic data generating unit 10 via the switch SW5 in the main scanning direction and the sub-scanning direction and synthesizes one image. Then, the video data Vo4 is provided. The adder 13 includes the video data Vo3 provided from the adder 12 and the rasterizer 1
1 is combined with the video data Vo4 provided from 1 to provide a combined video output signal Vout.

Next, the operation of the video processing apparatus according to the present invention will be described.

To simplify the description, the switch SW1 is connected to the digital demodulator 2 side, the switch SW2 is connected to the analog tuner 5 side, and the switch SW3 is connected to Video-1.
It is assumed that the switch SW4 is set to OFF and the switch SW5 is set to ON. At this time, the video and graphic data generation unit 1 of the digital broadcast is displayed on the television screen.
0 is displayed.

Here, when the user instructs the companding process for the graphic image using a remote controller or the like, the system C
The PU (not shown) determines whether any of the plurality of companding processing units 8 and 9 is currently unused. Here, since only the companding unit 8 is used, the system CPU determines that the companding unit 9 is not currently used. Therefore, the system CPU sets the switch SW4 to the graphic data generation unit 10 side and the switch SW5 to OFF in order to perform the compression / expansion processing on the video generated by the graphic data generation unit 10 using the compression / expansion processing unit 9. . Here, the user can display graphic images according to various modes as shown in FIGS. Therefore, a digital broadcast image and a graphic image that have both been subjected to expansion processing are displayed on the television screen.

Next, when the user instructs, for example, to delete a digital broadcast image by using a remote controller or the like, the system CPU sets the switch SW3 to OFF. As a result, only the graphic image is displayed on the television screen.

Next, when the user instructs, for example, a remote control or the like to display a terrestrial broadcast on a television screen together with a graphic image, the system CPU sets the switch SW3 to the Video-2 side. As a result, the terrestrial image and the graphic image both subjected to the companding process are displayed on the television screen.

FIG. 6A is a block diagram showing in detail the configuration around the companding processing section which is a main part of the present invention.
(B) shows a memory map of the memory 15. Hereinafter, the video data Video-1 is transferred to the horizontal compression unit 8a and the vertical
b, the operation in the case of companding using the horizontal extending unit 8c and compensating graphic data by the vertical compensating unit 8b will be described. In addition, in both Video-1 and Video-2, the horizontal compression unit 8a or 9a and the vertical companding unit 8b or 9
b, companding can be performed by using the horizontal compander 8c or 9c, and the graphic data can be processed by the vertical compander 8b or 9c.
b, Companding can be performed by the horizontal extension unit 8c or 9c.

The video data Video-1 output from the MPEG decoder shown in FIG. 1 is input to the horizontal compression section 8a via the switch SW14. When the horizontal compression processing is performed by the horizontal compression section 8a, the video data is temporarily stored in the V1 area A15a shown in FIG. 6B of the memory 15 via the switch SW6. When the horizontal compression process is not performed, the video data Vi
Deo-1 passes through the horizontal compression unit 8a as it is and is stored as video data in the V1 area A15a.

When the image is vertically expanded, the V
The video data stored in the one area A is read out, vertically expanded by the vertical compander 8b, and provided to the horizontal expander 8c via SW8 and SW9. When vertically compressing a video, the video data stored in the V1 area of the memory 15 is read out, vertically compressed by the vertical compander 8b, and stored again in the V1 area B15a 'of the memory 15. The vertically compressed video data is input from the memory 15 to the horizontal expansion unit 8c via the SW 9, and is output after being horizontally expanded. If the horizontal expansion is not performed, the video data is transferred to the horizontal expansion unit 8c.
Is output as it is. When the image is not subjected to the vertical companding process, the image data passes through the vertical companding unit 8b as it is. If the image is not vertically expanded, the image data is stored in the memory 15 between the horizontal compression unit 8a and the vertical expansion unit 8b.
May be directly transferred via SW6 and SW7.

The output video data V of the A / D converter 7 in FIG.
As for Video-2, horizontal and vertical companding processing is performed similarly to Video-1, using the horizontal compression unit 8a or 9a, the vertical companding unit 8a or 9b, the horizontal extending unit 8c or 9c, and the V2 area of the memory 15. Done.

The graphic generation unit 10a is a system CP
U generates graphic data under the control of U
5 is temporarily stored in the graphic area 15c shown in FIG. The stored graphic data is read by the rasterizer 11a in the main scanning direction and the sub scanning direction.

When performing vertical expansion processing on the graphic data generated by the graphic generation section 10a, the graphic data stored in the graphic area 15c of the memory 15 is read out, and the vertical expansion / compression section 9b is read via the SW11. , And then provided to the horizontal extension unit 9c via SW12 and SW13. When performing vertical compression processing on graphic data, the video data stored in the graphic area 15c of the memory 15 is read out and vertically compressed by the vertical companding unit 9b.
It is stored again in the graphic area B15c 'of the memory 15. Vertically compressed graphic data is SW13
Are input to the horizontal expansion unit 9c via the interface, and are output after being horizontally expanded. If the horizontal expansion is not performed, the graphic data is output through the horizontal expansion unit 8c as it is. The companded graphic data is synthesized by the adder 12 with the compensated video data. At this time, the rasterizer 11a reads another plane different from the decompressed graphic data, the read plane is combined with the output of the adder 12 by the adder 13, and the combined video Vout is output.

FIG. 7 is a block diagram showing a second embodiment of the video processing apparatus according to the present invention. In the configuration shown in FIG. 7, when a compression / expansion processing request for graphic data is input, the graphic data stored in the memory 15 is subjected to not only vertical compression / expansion processing as shown in FIG.
The feature is that horizontal companding processing can also be performed. To realize this, the graphic data stored in the memory 15 is transferred to the horizontal compression unit 8 via the switch SW16 or SW17.
a or 9a. Therefore, for the graphic data, the video data Video-1 and Video-2
Similarly, vertical and horizontal companding can be performed.

FIG. 8 is a block diagram schematically showing a video processing apparatus according to a third embodiment of the present invention. The video processing apparatus shown in FIG. 8 is characterized in that companding processing is performed on graphic data output from the rasterizer 11. First
In the second embodiment, the graphic data that can be companded is only one plane. However, according to the third embodiment, the graphic data generator 10 generates a plurality of graphic planes, the rasterizer 11 synthesizes these planes, and performs a companding process on the synthesized graphic data. . In order to realize this, switches SW16,
Via the SW 17, the video data Video-1 and Vi
The output of the rasterizer 11 is connected in addition to the deo-2.

FIG. 9 is a block diagram showing in detail the configuration around the companding section of the video processing apparatus shown in FIG. The output of the rasterizer 11a is supplied to the adder 13 via the switch SW18.
To the horizontal compression unit 8a or 9a via the switches SW17 and SW17. Therefore, as with the video data Video-1 and Video-2, the graphic data obtained by combining the plurality of planes is
Vertical and horizontal companding can be performed.

In this embodiment, the video companding circuit
Although the case of the system has been described, the companding processing of graphic data can be similarly performed in a case where there are three or more companding circuits.

[0039]

As described above, according to the present invention, the display size and position of the graphic plane on the television screen can be changed without changing the contents drawn on the graphic plane and the management information such as the position of the window. Can be changed.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a video processing device according to an embodiment of the present invention.

FIG. 2 is a view for explaining processing of a companding processing unit.

FIG. 3 is a diagram for explaining another process of the companding processing unit.

FIG. 4 is a diagram for explaining still another process of the companding processing unit.

FIG. 5 is a diagram for explaining processing of a companding processing unit and an adder;

6A is a block diagram showing in detail a configuration around a companding processing unit which is a main part of the present invention, and FIG. 6B shows a memory map of a memory 15. FIG.

FIG. 7 is a block diagram showing a second embodiment of the video processing device according to the present invention.

FIG. 8 is a block diagram schematically showing a third embodiment of the video processing device according to the present invention.

9 is a block diagram showing in detail a configuration around a companding processing section of the video processing apparatus shown in FIG. 8;

FIG. 10 is a block diagram schematically showing a configuration of a video processing unit of a conventional television receiver.

Claims (5)

[Claims] A first video data providing step for providing first video data; a second video data providing step for providing second video data; a graphic data generating step for generating graphic data; A first companding step of compressing or decompressing the first image provided by the first or second video data providing step or the graphic data generating step in both vertical and horizontal directions or in one direction; A second companding step of compressing or expanding a second image different from the first image provided by the first or second video data providing step or the graphic data generating step in both vertical and horizontal directions or in one direction; And an image synthesizing step of synthesizing the two images expanded by the first and second expansion steps. Image processing method according to claim. 2. A first video data providing means for providing first video data, a second video data providing means for providing second video data different from the first, and generating graphic data. Graphic data generating means; and a first image for compressing or expanding the first image input from the first or second video data providing means or the graphic data generating means in both vertical and horizontal directions or in one direction Companding means for compressing or expanding a second image different from the first image input from the first or second video data providing means or the graphic data generating means in both vertical and horizontal directions or in one direction A video processing apparatus comprising: a second companding unit that performs compensating; and a combining unit that combines two images companded by the first and second companding units. 3. The video processing apparatus according to claim 2, further comprising second image synthesizing means for synthesizing the image synthesized by said synthesizing means and the image generated by said graphic data generating means. . 4. An externally input instruction for companding an image generated by said graphic data generating means confirms that at least one of said first and second companding means is not used. 3. The video processing apparatus according to claim 2, further comprising control means for companding the image generated by said graphic data generating means by using said unused companding means. 5. A video data providing means for providing video data; a graphic data generating means for generating graphic data; and an image provided by the video data providing means or an image generated by the graphic data generating means being vertically And a companding means for compressing or expanding in both or one of the horizontal direction.