JP4305974B2 - Image display device and image display method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image display device, and in particular, fade-in and fade-out for sequentially displaying or erasing an image of one frame divided into a plurality of blocks when starting or ending image display or switching a display screen (scene change). The present invention relates to an image display apparatus having a function and an image display method thereof.
[0002]
[Prior art]
In a display circuit that displays a video signal input from an imaging circuit in an image display device, for example, a video camera or the like, the display screen is displayed by some means rather than instantaneously switching the display screen when starting or ending the image display or switching the display screen. Special effects processing, so-called fade-in or fade-out technology, is adopted that gradually changes the screen and finally switches to a completely new screen. Various methods have been proposed so far for fade-in and fade-out techniques.
[0003]
As a simple example of fade-in or fade-out technology, for example, at the start of display, the entire screen is gradually changed from white or black background color to brightness or color, and finally switched to the image signal input from the imaging circuit When the display is finished, the luminance or color is gradually changed from the normal display screen, and finally the display screen is changed to a white or black background color.
[0004]
[Problems to be solved by the invention]
By the way, in the special effect processing in the above-described conventional image display device, for example, the screen switching is simple, the luminance or color is uniformly changed over the entire normal display screen, and the display screen is divided into several partial screens. It was not possible to process each divided portion. Moreover, if it is going to implement | achieve an advanced special process, the processing apparatus for that will become complicated and there exists a disadvantage that the cost increase of an image display apparatus cannot be avoided.
[0005]
The present invention has been made in view of such circumstances, and an object thereof is to transfer a digitized image signal transmitted from an imaging device or the like by a processing device including a memory and a control circuit. To provide an image display device capable of processing a screen divided into a plurality of blocks for each block in a large scene change and the like, and realizing various special video effects with a simple circuit configuration, and a display method thereof. .
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an image display device of the present invention includes a first storage unit that stores at least one frame of image data, and a plurality of pieces of image data of one frame read from the first storage unit . Second storage means for storing as block image data; writing the one frame of image data into the first storage means ; reading out image data of each block from the first storage means at a predetermined time interval ; the read image data is stored in a predetermined area of the second storage means, each block in the position of the display means corresponding to the stored predetermined regions are displayed at the predetermined time intervals, is the display be moved to another area for each display time of the display means within the predetermined time interval in the image data is stored region said second storage means blocks , And a, a display makes the control unit to move in a predetermined order within the display screen of each block of the image data displayed on the display means corresponding to said one frame.
[0007]
In the present invention, it is preferable that the display unit sequentially reads out the stored data from the second storage unit at a predetermined time interval, displays an image of one frame based on the read data, and the control unit The image data of each block stored in the second storage means is stored at each time interval of the image display in the display means so that the image of each block displayed on the display means moves in a predetermined direction. Move to a different area of the second storage means.
[0008]
The image display method of the present invention writes image data for at least one frame in the first storage means, in the first predetermined time interval as image data of a plurality of blocks of image data of one frame from the storage means writing and reading, the read image data in a predetermined area of the second storage means, each block in the position of the display means corresponding to the written predetermined regions displayed in the predetermined time interval, which is the display Each area of the image data displayed on the display means is moved by moving the area in which the block is stored to another area for each display time of the display means within the predetermined time interval in the second storage means. It appears in the display block to move in a predetermined order within the display screen corresponding to the one frame.
[0009]
Furthermore, in the present invention, the image data of each block written in the second memory is sequentially moved from the first write data area to another area at each image display time interval, and divided in the image of one frame. After all the image data of each block transferred is transferred to the second memory, the input image data is transferred to the second memory.
[0010]
According to the present invention, at the time of display screen switching such as display start, end, or scene change, a predetermined frame of input image data is stored in the first memory, and an image of the one frame is set in advance. Are divided into a plurality of blocks, and the image data of the divided blocks are read from the first memory in a predetermined order and written in a predetermined area of the second memory. Since the display means displays the image according to the data stored in the second memory at a predetermined time interval, each block of the divided one-frame image appears in a predetermined order on the display screen.
[0011]
Further, the image data of each block stored in the second memory moves from the first storage area every display time of the display means, so that each block appears on the display screen and sequentially moves in a predetermined direction. A special visual effect is realized. When all the images of each divided block are displayed on the display screen, the image signal input by the selection circuit is selected and written to the second memory, so that the image signal corresponding to the input image data is displayed. Displayed on the screen.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a circuit diagram showing an embodiment of an image display apparatus according to the present invention.
As shown in the figure, the image display apparatus of the present embodiment is an image pickup apparatus comprising a lens 1, a CCD image pickup unit 2, a sample hold and AGC (automatic gain control) circuit 3, an analog / digital converter 4 and a digital signal processing circuit 5. 10, a memory circuit 6, a digital / analog converter 7, and a control circuit 8.
[0013]
In the imaging apparatus 10, the lens 1 collects incident light on the CCD imaging unit 2. The CCD imaging unit 2 converts an image generated by incident light into an electric signal (hereinafter referred to as an image signal) S2. The image signal S2 obtained from the CCD imaging unit 2 is input to the analog / digital converter 4, and for example, digital image data S4 corresponding to the luminance level and color of the image signal S2 is output. The digital image data S4 is output to the digital signal processing circuit 5.
[0014]
In the digital signal processing circuit 5, predetermined signal processing is performed. For example, various processing such as luminance correction, interpolation processing, or camera shake correction processing is performed. As a result of the signal processing, image data _SD is output and output to the memory circuit 6.
[0015]
The memory circuit 6 holds the input image data _SD and supplies the held data to the digital / analog converter 7. Digital / analog converter 7 converts the image data from the memory circuit 6 into an analog signal S _I, the display device, not shown, for example, CRT, and outputs to a display device such as a liquid crystal display, these display devices Display video.
[0016]
The operation of each part of the imaging device 10, the memory circuit 6, the digital / analog converter, and the display device described above is controlled by the control circuit 8, for example. The control circuit 8 is constituted by, for example, a microprocessor incorporating a CPU (Central Processing Unit), and generates a control signal S _C that controls the operation of each of the partial circuits according to a preset processing procedure. Transfer to each circuit.
[0017]
In the present embodiment, when a display start, a display end, a scene change, or the like is performed, a predetermined process is performed in the memory circuit 6 on the image data supplied from the imaging device 10 based on the control of the control circuit 8. By dividing the image of the frame into a plurality of blocks and transferring and displaying the image data corresponding to the images of the divided blocks, a special effect of displaying the blocks on the display screen in a predetermined order is realized.
[0018]
In FIG. 1, the special effect is realized by processing the image data output from the imaging device 10, but the present invention is not limited to this, and other than the imaging device 10. It goes without saying that the same processing can be realized for image data reproduced by an image recording apparatus such as an image output apparatus, for example, a digital VTR (video tape recorder).
[0019]
FIG. 2 is a circuit diagram showing the internal configuration of the memory circuit 6. As illustrated, the memory circuit 6 includes a memory 62 (first memory), a selection circuit 64, and a memory 66 (second memory).
[0020]
The memory 62 holds the input image data _SD , and the image data designated by the control circuit 8 among the held image data is read and output to the selection circuit 64.
The selection circuit 64 selects and outputs either the input image data _SD or the image data read from the memory 62 according to the selection control signal SEL from the control circuit 8.
The memory 66 holds the image data output from the selection circuit 64, and further outputs the held image data to the digital / analog converter 7.
[0021]
When performing normal image display, the selection circuit 64 selects and outputs the input image data _SD in accordance with the selection control signal SEL from the control circuit 8. The memory 66 holds the image data input from the selection circuit, and sequentially outputs the held image data to the digital / analog converter 7.
As a result, the input image data is sequentially converted into an analog signal and output to the display device, so that an image corresponding to the input image data _SD is displayed on the display device.
[0022]
On the other hand, at the time of a scene change or the like, image data corresponding to an image of one frame from the input image data _SD is input to the memory 62 and stored in the memory 62. At this time, the selection circuit 64 is switched to the output side of the memory 62, selects the image data output from the memory 62, and outputs it to the memory 66. In this case, the image data of one frame stored in the memory 62 is divided into a plurality of blocks based on the control of the control circuit 8, and the data of each block is sequentially read out in a predetermined order and output to the selection circuit 64. Is done.
[0023]
FIG. 3 shows how image data is divided in this embodiment. As shown in the figure, an image of one frame stored in the memory 62 is divided into N blocks from block 1 to block N. In FIG. 3, the vertical division is divided into five, but the present invention is not limited to this. For example, the division number N can be arbitrarily set from the outside.
[0024]
In the memory 62, image data corresponding to an image of one frame is sequentially input and stored. At the time of reading, as shown in FIG. 3, for example, image data corresponding to the block 1 is first read and output to the selection circuit 64. The output image data is transferred to the memory 66 via the selection circuit 64 and stored in a predetermined data area of the memory 66. The image data stored in the memory 66 is sequentially read out and output to the digital / analog converter 7 where it is converted into an analog signal. For this reason, in the display device, the image of block 1 first appears at a predetermined position.
[0025]
Next, the image data of block 2 is read from the memory 62 and output. The image data of the block 2 is transferred to the memory 66 through the selection circuit 64 and stored in a predetermined area of the memory 66. Therefore, in the display device, the image of block 2 appears after the image of block 1.
[0026]
As described above, the image data of each block up to the block N is sequentially read out, transferred to the memory 66 via the selection circuit 64, and stored in the memory 66. Therefore, in the display device, the blocks 1 to N are displayed. Images of each block appear sequentially. When all the images of one frame appear on the display screen, the input image data _SD is selected by the selection circuit 64. In response to this, the display device displays an image corresponding to the input image data _SD . That is, the display is switched to the normal display state.
[0027]
In the image data transfer process described above, the image data of each block read from the memory 62 is written in a different storage area for each display in the memory 66, so that the image of each block moves on the display device. Is displayed.
[0028]
FIG. 4 shows a display example at the start and end of display in the present embodiment. As shown in the figure, at the start of display, on the initial screen, that is, the display screen composed of white or black background color (FIG. 4A), first, block 1 is displayed on the upper left of the screen, and block 1 is displayed from the top of the screen. When it moves downward and finally reaches the lower left of the display screen, it stops at that position (FIG. 4B). Next, the block 2 also appears from the upper left of the screen in the same manner as the block 1, moves downward, and stops when it reaches the top of the block 1 (FIG. 4C).
[0029]
When five blocks from block 1 to block 5 are sequentially displayed according to the above-described operation, all the blocks in the left column of the display screen are displayed. Next, each block in the second row, that is, each block such as block 6 and block 7 appears on the screen in the same manner as blocks 1 to 5 in the first row, and moves downward from the top of the screen. , Stop at a predetermined position.
[0030]
The above-described operations are sequentially performed up to the block N. As a result, all the blocks of the divided one-frame image are displayed. Then, based on the control of the control circuit 8, the selection circuit 64 shown in FIG. 2 is switched, and the input image data _SD is selected and input to the memory 66, so that it corresponds to the input image data _SD . A screen is displayed.
By such processing, after the display is started, the image of each divided block appears from the top of the screen, moves downward, and finally stops at a predetermined place. That is, it is possible to obtain a visual effect that blocks flow from the top to the bottom of the display screen. When all the blocks reach a predetermined location on the display screen, normal display starts.
[0031]
FIG. 5 is a timing chart showing the operation at the start of display shown in FIG. Hereinafter, the timing of each operation such as image data transfer and screen display at the start of display shown in FIG. 4 will be described with reference to FIG.
[0032]
FIG. 5A shows the data read timing of the memory 62 shown in FIG. FIG. 5B shows the data write timing in the memory 66. FIG. 3C shows the display timing in the display device.
[0033]
As shown in the figure, after the display is started, first, the image data of block 1 is read from the memory 62 and written in a predetermined area of the memory 66. Here, one display is performed on the display device based on the data stored in the memory 66. At this time, on the display screen, the block 1 appears at a predetermined position, for example, at the upper left of the screen. Next, the image data of block 1 moves from the first writing area of the memory 66 to another area. After the movement, a second display is performed on the display device. At this time, the block 1 moves on the display screen and appears, for example, at a predetermined position below the first display position. Thus, since the image data of block 1 is displayed on the display device while sequentially moving in the memory 66, block 1 appears on the display screen from the upper left, flows downward, and stops at the lower left of the screen.
[0034]
Following block 1, the image data of block 2 is read from the memory 62 and transferred to the memory 66 via the selection circuit 64. After transferring the image data, the image is displayed on the display device. Thereby, for example, block 2 appears at the upper left of the screen. Then, the image data of block 2 is moved in the memory 66, and then the moved block 2 is displayed on the display device. When block 2 moves above block 1, it stops. For this reason, on the display screen, block 2 appears after block 1 and flows downward. And when it reaches the position above block 1, it stops.
[0035]
Since blocks 3, 4 and 5 are sequentially displayed following block 2, all the blocks in the first column on the left side of the display screen are displayed. Next, the blocks in the second column from the block 6 are sequentially displayed on the screen in the same manner. This operation is repeated until the last N blocks.
[0036]
By the above-described operation, when display is started, a plurality of divided blocks appear sequentially on the screen, and flow downward from the top of the screen and stop at predetermined positions. When all the blocks of the image in one frame are displayed at predetermined positions, the selection circuit 64 is switched, and the input image data is transferred to the memory 66, so that a normal image is displayed accordingly. Displayed by the device.
[0037]
As shown in FIG. 4, contrary to the case of the display start described above when the display is ended, for example, the operation starts from a normal display screen, and one frame of image data immediately before the display ends is stored in the memory 62. An image of one frame stored in the memory 62 is divided into a plurality of blocks, and image data corresponding to each block is sequentially transferred to the memory 66 via the selection circuit 64. In the memory 66, the transferred image data of each block is written and further moved sequentially. Therefore, on the display screen, each block sequentially moves outward from the screen, and white or black is moved to the place after the movement. Filled with background color. As a result, each block of the image of one frame sequentially flows out of the screen and disappears from the screen. Finally, when the entire display screen becomes a white or black background color, the processing is ended.
[0038]
Note that FIG. 4 shows a processing procedure at the start and end of display, but in the case of a scene change, it can be realized by substantially the same processing. For example, when a scene change is started, image data of the first frame of a new scene is stored in the memory 62 shown in FIG. At this time, the display screen continues to display the image before the scene change. Then, the image data of each block divided from the memory 62 is sequentially read out, selected by the selection circuit 64, and transferred to the memory 66. As a result, each block from block 1 to block N sequentially appears on the screen, and the image before the scene change is sequentially replaced with each block of the new image. When all the images of one frame are replaced with new images, the selection circuit 64 is switched, and the input image data is selected and transferred to the memory 66, and the image after the scene change is displayed on the display device accordingly. Is done.
[0039]
As described above, according to the present embodiment, at the time of screen switching such as image display start / end or scene change, one frame of image data is stored in the memory 62, and the one frame image is divided in advance. The image data is divided into a plurality of blocks by the number, and image data corresponding to the image of each divided block is sequentially read out from the memory 62, selected by the selection circuit 64, and written in a predetermined area of the memory 66. The image data of each block is sequentially moved to a predetermined area. Since the data stored in the memory 66 is converted into an analog signal by the digital / analog converter 7 and displayed on the display device, the image of each block divided on the display screen sequentially appears on the screen and moves to a predetermined position. Stop. When all the blocks are displayed at predetermined positions, the image data _SD input by the selection circuit is selected and transferred to the memory 66. As a result, when switching screens, block images appear sequentially on the screen, and a screen switching method of moving to a predetermined position can be realized, and special visual effects can be realized with a simple circuit configuration.
[0040]
【The invention's effect】
As described above, according to the image display device of the present invention, there is an advantage that a special visual effect at the time of screen switching can be realized by a simple circuit without complicating the circuit configuration. Since the screen switching operation is controlled by a control circuit incorporating a microprocessor or the like, various special effects can be easily realized by rewriting the microprocessor control program without changing the hardware. .
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing an embodiment of an image display device according to the present invention.
FIG. 2 is a circuit diagram showing an internal configuration of a memory circuit.
FIG. 3 is a diagram illustrating an image of one frame divided into a plurality of blocks.
FIG. 4 is a diagram showing screen changes at the start of display and at the end of display.
FIG. 5 is a timing chart showing operation timing at the start of display.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... CCD imaging part, 3 ... Sample hold and AGC circuit, 4 ... Analog / digital converter, 5 ... Digital signal processing circuit, 6 ... Memory circuit, 7 ... Digital / analog converter, 8 ... Control circuit DESCRIPTION OF SYMBOLS 10 ... Imaging device 62, 66 ... Memory, 64 ... Selection circuit.

Claims (7)

Display means;
First storage means for storing image data of at least one frame ;
Second storage means for storing one frame of image data read from the first storage means as image data of a plurality of blocks ;
The one frame of image data is written to the first storage means, the image data of each block is read from the first storage means at a predetermined time interval, and the read image data is read from the second storage means with a predetermined value. The block is stored in the area, each block is displayed at the predetermined time interval at the position of the display means corresponding to the stored predetermined area, and the area where the image data of the displayed block is stored is the second In the storage means, each block of the image data displayed on the display means is displayed on the display screen corresponding to the one frame by moving to another area for each display time of the display means within the predetermined time interval. Control means for displaying to move in a predetermined order within ,
An image display device comprising: The control means, in accordance with the divided constant set externally, an image of the one frame (m × n) (m, n are natural numbers) image display apparatus according to claim 1 divided into blocks. The image display device according to claim 1, wherein a predetermined initial value is stored in the second storage unit in an initial state, and a color of white or black is displayed on the display unit according to the initial value. Either the input image data or the image data stored in the first storage means is selected according to a selection signal from the control means, and the selected image data is stored in the second storage means. The image display apparatus according to claim 1, further comprising a selection circuit for outputting. The image display apparatus according to claim 1, wherein the first storage unit includes a memory in which the input image signals are sequentially written, and stored data is read from an address designated by the control unit. Upper Symbol second storage means, the data to the address specified by the control means is written, the image data stored image display according to claim 1, characterized in that is constituted by a memory which are sequentially read out to the display means apparatus. Writing at least one frame of image data into the first storage means ;
Read in the first predetermined time interval as image data of a plurality of blocks of image data of one frame from the storage means, writes the read image data in a predetermined area of the second storage means,
Each block is displayed at the predetermined time interval at the position of the display means corresponding to the written predetermined area ,
By moving the area where the displayed block is stored in the second storage means to another area for each display time of the display means within the predetermined time interval ,
Display makes image display method so that each block of the image data displayed on the display means to move in a predetermined order within the display screen corresponding to the one frame.

Images