JPH10164433A - Method and device for switching picture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the comprehension of movement by continuously enlarging/reducing an image by providing plural passing blocks when displaying the image of 1st block on a 2nd designated block, and displaying the 1st block image through the passing blocks into the 2nd block. SOLUTION: A 1st block A started from (x0, y0) is stored in a memory. In this case, x0 is defined as a dot number from the left side of the picture and y0 is defined as a scanning line number from the surface of screen. First, data in the memory are read from the upper left side on the screen, a scanning line is moved, the scanning line y0 is successively plotted from the dot number x0. Next, when the reduction/movement to a 2nd block C having a coordinate (xs, ys) is instructed, the reduction scale of reducing processing from block A to block C and a moving distance are determined. Here, one step block B of passing block is set in the middle from block A to block C, and the image of A is reduced to 1/2 and held in the memory. Then, a coordinate (xj, yj) of intermediate point between coordinates (x0, y0) and (xs, ys) is formed and displayed for several frames.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display method, and more particularly, to a screen switching method and apparatus having a function of displaying a plurality of image information reception signals in a plurality of divided sections of a display screen.

[0002]

2. Description of the Related Art Along with an increase in the screen size of an image display device, image information reception signals of a plurality of channels (television broadcast waves, etc.)
Has been started to be used, which has a function of displaying the image on a plurality of divided sections of the display screen. That is, as shown in FIG. 6, there are a plurality of small sub-screens 92a, 92b, 92c, etc. beside the large main screen 91, each sub-screen displays an image of a different channel, and the main screen is the same as any of the sub-screens. Display video. Conventional video switching between the main screen and the sub-screen has been performed as follows.

That is, each sub-screen in FIG. 1A displays a reduced screen of each channel, and one of them is a sub-screen 92a.
Is also displayed on the main screen. When the operation of switching to the channel displayed as the sub screen 92b is performed,
As shown in (b), an image of the same channel as the sub-screen 92b is displayed on the main screen.

[0004]

In the conventional method described above, one of the sub-screens suddenly becomes the main screen, and the previous main screen also immediately becomes one sub-screen. For this reason, it is difficult to determine which sub-screen the previous main screen has become, and when switching again and selecting a channel other than the previously viewed channel, it is difficult to determine which sub-screen the previously viewed channel is on. If you don't use much nerves, you may end up choosing the channel you saw last time. When such an undesired result is obtained, there is a problem that time is wasted and a user is irritated.

An object of the present invention is to provide a screen switching method and apparatus which can easily and easily correspond to the main screen and the sub-screen before and after switching from the above situation.

[0006]

According to the present invention, there is provided a screen switching method for dividing a display screen into a plurality of sections and displaying a plurality of images at the same time. When the image displayed in the first section is displayed in the second section, at least one transition section different from the first section and the second section is provided, and the image displayed in the first section is displayed in the second section. It is an object of the present invention to provide a screen switching method and apparatus, wherein a screen is displayed in a section and an image displayed in the progress section is displayed in the second section.

In other words, in an image information display system having a function of displaying image information signals of different reception channels received by a plurality of tuners in divided sections of a display screen, an image of a designated section is visually recognized. A function of enlarging / reducing in a plurality of steps to the extent that the user feels that the area is almost continuously enlarged / reduced; And a screen switching method for image information display having a function of moving the position of the image information to one of a plurality of positions.

FIG. 1 is a diagram illustrating the principle of the present invention. A plurality of image data supply units 01a each outputting image data
(Combined circuit of TV Tuner and Decoder, video equipment such as VTR, etc.), and a plurality of enlargement / reduction sections 03a for respectively performing enlargement / reduction processing of the image data output from the plurality of image data supply sections 01a and the like. And an enlargement / reduction instruction for giving an enlargement / reduction instruction to each of the plurality of enlargement / reduction units 03a and the like.
A reduction control unit 03 and a plurality of memories 04 for storing respective data passed from the respective enlargement / reduction units 03a and the like.
a, etc., and each of the plurality of memories 04a, etc.
Memory control unit 04 that performs write timing control
A switching unit 06 for forming a path from the memory to start reading to the display unit 08; a switching control unit 05 for instructing switching to the memory 04a or the like; and a display unit for displaying an image.
08 and is used.

According to the present invention, by giving continuity in a stepwise or smooth change in the enlargement / reduction and movement of an image, the user can determine which image is being enlarged / reduced, and which image is in which position. It can be easily recognized whether or not it has moved.

[0010]

FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, a block 11 such as TV Tuner1 is a television broadcast receiver, which receives and detects programs on different channels (Ch1 and the like), and outputs pixel values and synchronization signals decoded by the Decoder 21 and the like. . N-th block in the figure
1n (for example, VT
Similarly, the output of R) is decoded by the Decoder 2n and outputs a pixel value and a synchronization signal.

The enlargement / reduction block 31 performs enlargement / reduction processing of the input image data to an appropriate size in accordance with the instruction of the enlargement / reduction control block 30, and performs a next-stage memory 41.
Pass data to etc. Scale control block 30
Determines the number of steps until the designated image size or the enlargement / reduction ratio is reached, or the enlargement / reduction ratio to be performed at one time, outputs the value, and inputs the value to the enlargement / reduction block 31 or the like. This enlargement / reduction is repeated until the designated image size or the enlargement / reduction ratio is reached and the number of steps of the enlargement / reduction processing is counted and the set value is reached.

The memory 41 and the like hold the data subjected to the enlargement / reduction processing until a read instruction is issued. The memory control block 40 controls the read / write timing of the memory.

The switching control block 50 gives an instruction to the memory control block 40 as to which data is to be read, and similarly informs the switching block 60 from which memory the data is output. The switching block 60 follows the instruction of the switching control block 50 and starts reading from the memory.
Configure the path to Encoder70. The Encoder 70 converts the digital data from the memory into a video signal (eg, NTS
C, PAL, etc.). The monitor 80 displays an image based on the video signal.

When an instruction to move image data is given to the enlargement / reduction control block 30 from an input device such as a remote control unit (not shown), the enlargement / reduction control block 30 performs a plurality of steps up to the movement target position. In one step, the change of the moving address (display position on the screen) is calculated, and when reading the address, the switching control block 50 sends a switching command to the switching block 60, and the switching block 60 performs switching.

Next, the image of the channel 2 is reduced to the state of the image C (from the state of the image A to the state of the image C) using the flowchart for explaining the embodiment shown in FIG. 3 and the explanatory diagram (2) of the embodiment shown in FIG. The case where the display is changed) will be described. For example, a channel is selected by a remote controller of a television or the like, and an initial value is set in an initial value set for a moving position of an image and a necessary enlargement / reduction ratio. Next, the counter counts the number of times of processing, and performs enlargement / reduction processing for one step in the enlargement / reduction processing. This enlargement / reduction process is repeated until the number of steps reaches a predetermined value.

Next, in the movement processing, first, the number of times the movement processing has been performed is counted, and then the movement processing is performed. Here, even though the transfer processing is performed, it is actually switching at which timing the data in the memories 1 to n is read. For example, now
It is assumed that an image starting from (x0, y0) exists in the memory 2. Here, x0 means a dot number from the left side of the screen, and y0 means a scanning line number from the top of the screen. The scanning line moves while reading data from the memory from the upper left of the screen, and when the dot number on each scanning line is x0, the memory 2 is read from another memory.
And the data in the memory 2 is sequentially drawn on the scanning line y0.

When reduction and movement to the state of C are instructed, 1
The reduction ratio and the moving distance of the reduction processing in the step are determined, and the processing is performed according to those values. For example, when the display state of A is changed to the display state of C in two steps, the image of A is first reduced to half, the image data is held in the memory 2, and the coordinates (x0, y0), (xs, ys) The coordinates (xj, yj) of the intermediate point are determined, and the memory is switched at the position of the dot xj. This state is displayed for several frames, and then the state shifts to the state C.

The above description has been made with reference to an example of a total of two steps in which one step (B) is placed in the transition section during the movement from the first section (A) to the second section (C). The present invention provides more steps and can move more smoothly. For example, a step is provided between A and B in which the position and the screen size take an intermediate value between the two, and a step in which the position and the screen size takes an intermediate value between the two is provided between B and C. The movement can be grasped more smoothly by the movement.

This movement can naturally move not only from the main screen to the sub-screen but also from the sub-screen to the main screen. In addition to moving the main screen to the sub-screen and then moving the sub-screen to the main screen as the next step, it also includes moving the two in parallel. It should be noted that the position and size of the screen in the transition section need not be limited to the intermediate position / size between the first section and the second section.

FIG. 5 (2) is an explanatory diagram of the embodiment of FIG. 5 in which, when the main screen A moves to the sub-screen C via the intermediate screen B, the sub-screen D immediately changes to the main screen F via the intermediate screen E. It is shown that.

As described above, the screen includes an input (external input) of an external video device such as a VTR in addition to the television screen received by the television tuner. Naturally, it is also possible to move the external input in the same process as in the case of the television signal.

[0022]

As described above, according to the present invention, images of a plurality of channels such as a television can be displayed in a plurality of sections on one display device. Since the user of the image display device visually enlarges / reduces the image of the section designated by himself / herself, which channel is being processed and which position has been moved? Can understand. For this reason, it is easy to memorize which sub-screen corresponds to the channel selected last time, and the psychological burden on the receiver is reduced. That is, a display method in which the man-machine interface is superior to the conventional display method is provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle

FIG. 2 is a configuration diagram of an embodiment.

FIG. 3 is a flowchart for explaining an embodiment.

FIG. 4 is an explanatory view of an embodiment (1).

FIG. 5 is an explanatory view of the embodiment (2).

FIG. 6 shows a conventional display mode.

[Explanation of symbols]

 01a, 01b, 01c Image data supply unit 03 Enlargement / reduction control unit 03a, 03b, 03c Enlargement / reduction unit 04 Memory control unit 04a, 04b, 04c Memory 06 Switching unit 05 Switching control unit 08 Display unit 11,12,13 TVTuner 1n External video equipment 21,22,23,2n Decorder 30 Enlargement / reduction control block 31,32,33,3n Enlargement / reduction block 40 Memory control block 41,42,43,4n Memory 50 Switching control 60 Switching block 70 Encoder 80 Monitor 91 Main screen 92a, 92b, 92c, 92d, 92e, 92f Sub screen

Claims (2)

[Claims] 1. A screen switching method capable of dividing one display screen into a plurality of sections and displaying a plurality of images at the same time, wherein an image displayed in a first section is displayed in a second section. Providing at least one transition section different from the first section and the second section, displaying an image displayed in the first section in the transition section, and displaying an image displayed in the transition section in the second section. A screen switching method characterized by displaying in a second section. 2. A plurality of image data supply units each outputting image data, a plurality of enlargement / reduction units respectively performing enlargement / reduction processing of the image data output by the plurality of image data supply units, and An enlargement / reduction control unit for giving an instruction for enlargement / reduction to each of the enlargement / reduction units;
A plurality of memories for storing respective data passed from the respective enlargement / reduction units; a memory control unit for performing read / write timing control of each of the plurality of memories; A switching unit that forms a path to the memory, a switching control unit that instructs switching to the memory, and a display unit that displays an image, wherein the enlargement / reduction control unit is a first section of the display unit. Enlarging / reducing the image data of the image displayed in the corresponding enlarging / reducing unit, the memory control unit causing the data passed from the enlarging / reducing unit to be stored in the corresponding memory, and the switching control unit Causes the switch to switch the memory at a predetermined timing, and the display unit displays the first
The image data displayed in the section is displayed in the elapsed section, and the data of the image displayed in the elapsed section in the same manner is displayed in the second section of the display unit. Switching device.