JPH03132693A - Video processor - Google Patents

Abstract

PURPOSE:To facilitate picture-in-picture image processing by moving a mouse point or the like to execute adjustment such as the expansion/contraction of a picture formed by superposing a 2nd image on a part of a 1st image screen. CONSTITUTION:A specification point pointed out by a point specifying means is moved to the lower right corner of the 2nd image on a monitor 9 while operating the mouse 8 and prescribed operation for starting expansion processing is executed. When the specification point is moved to a required position by operating the mouse 8 again, an arithmetic means calculates displayed data so that the lower right corner of the 2nd image coincides with the moved specification point, an image superposing circuit adjusts the size of the 2nd image, a vertical/horizontal ratio, etc., based upon the display data and superposes the adjusted data to the 1st image. Thus image processing called as picture-in- picture can easily be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video processing device that superimposes and displays moving images provided from the outside on a monitor screen of a so-called personal computer (personal computer) or the like.

[Conventional technology]

In the field of personal computers, image processing called picture-in-picture, which displays television images obtained from a TV tuner, video deck, etc., superimposed on computer images has become popular.

[Problem to be solved by the invention]

However, picture-in-picture image processing technology
Although devices using large-scale equipment such as television stations have been put into practical use, those using relatively small-scale information processing equipment such as personal computers are still at the research stage. Therefore, sufficient consideration has not been given to ease of use.

An object of the present invention is to solve these problems.

[Means to solve the problem]

In order to solve the above problems, the video processing device of the present invention includes:
A video means for creating a desired video signal, a first video signal which is a video signal created by the video means, and a second video signal given from the outside are combined, and a video signal generated by the first video signal is displayed on the video based on the display data. a video superimposition circuit that outputs to the monitor a new video signal in which a video from a second video signal whose position, size, vertical and horizontal ratios, etc. have been adjusted; a point specifying means for pointing to a point; and an arithmetic means for calculating the display data and providing it to the image superimposition circuit so that a predetermined portion of the image according to the second video signal is located at the position of the specified point indicated by the point specifying means on the monitor. It is prepared.

[Effect]

For example, after operating the mouse to move the specified point indicated by the point specifying means to the lower right corner of the second image on the monitor and performing a predetermined operation to start the enlargement process, operate the mouse again to specify the point. When the point is moved to a desired position, the calculation means calculates display data so that the lower right corner of the second image is at the moved specified point, and the image superimposition circuit adjusts the size of the second image based on the display data. The pod's top, bottom, left, and right ratios are adjusted and superimposed on the first image.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention.

Inside the computer body 1, there is a central processing unit (CPU)
) 2, memory 3, mouse interface section 4, keyboard interface section 5, memory map control section 6, and video signal circuit section 7 are built in. Memory 3 is RAM
and a ROM, in which various programs are stored and data is temporarily stored. A mouse 8 is connected to the mouse interface section 4 via a connector. The mouse interface section 4 outputs position information indicating an arbitrary point on the screen of the monitor 9 based on a signal from the mouse 8. The video signal circuit section 7 outputs a PC video signal based on the commands of the CPU 2, and also displays a mouse image that displays a designated point (mouse point) on the monitor 9 with a small arrow based on the position information from the mouse interface section 4. Output a signal. A keyboard 10 is connected to the keyboard interface unit 5 via a connector, and data based on key operations is sent onto a pass line inside the personal computer body 1. The memory map control section 6 controls a video superimposition circuit 12 provided outside the personal computer body 1.

The video superimposition circuit 12 includes a write control section 13 and a video memory 14.
, a read control section 15 and a mixing circuit section 16. The video superimposition circuit 12 receives the first signal from the video signal circuit section 7.
The video signal and the second video signal from the TV tuner 11, which is an external video signal source, are combined to create a new video signal in which the video from the second video signal is superimposed on a portion of the video from the first video signal. This is a circuit that does this. This video superimposition circuit 12 is
When superimposing images, the size, position, vertical, horizontal ratio, etc. of the image based on the second video signal can be arbitrarily set. The setting is performed based on display data given from the memory master knob control section 6 to the write control section 13, read control section 15, and mixing circuit section 16.

The write control section 13 includes a horizontal dot clock generator 21 and a vertical line clock generator 22, as shown in FIG. 2(A).
, horizontal writing number counter 23, vertical writing number counter 2
It is equipped with 4. The horizontal clock generator 21 and the vertical line clock generator 22 are connected to the TV tuner 1.
It outputs horizontal and vertical clocks when quantizing (A/D conversion) the second video signal from 1, and the respective clock frequencies are set based on the display data from the memory master control unit 6. Ru. The horizontal writing number counter 23 and the vertical writing number counter 24 each have a second
It is reset by the horizontal synchronization signal and vertical synchronization signal of the video signal, and is stored in the video memory 14 when the number of horizontal and vertical line clocks reaches a predetermined value based on the display data from the memory map control section 6. Stops writing the video signal. Note that writing to the video memory 14 is started by horizontal and vertical writing start counters (not shown) which are also reset by horizontal and vertical synchronizing signals. Therefore, by using the write start counter and the write number counter, it is possible to arbitrarily set an area to be written into the video memory 14 from among the screen created by the second video signal. Specifically, the write start counter sets the left end and top end of the write area, and the write number counter sets the right end and bottom end of the write area.

The read control unit 15 includes a horizontal dot clock generator 25 and a vertical line clock generator 26, as shown in FIG. 2(B).
It is equipped with These clock generators 25 and 26 provide clocks for reading data stored in the video memory 14 and converting it into analog signals, and their frequencies are set based on display data from the memory map control unit 6. .

As shown in FIG. 2(C), the mixing circuit section 16 includes a horizontal readout counter 27, a vertical readout counter 28,
and horizontal/vertical readout start counters (not shown). These counters are reset by the synchronization signal of the first video signal from the video signal circuit section 7, and count the horizontal dot clock and vertical line clock until they reach a value based on the display data from the memory map control section 6. Reading from the video memory 14 is started by the output of the horizontal/vertical read start counter, and stopped by the output of the read count counters 27 and 28. The settings of these counters determine the size of the screen based on the second video signal on the screen based on the first video signal.

Next, the operation of this embodiment will be explained using the flowchart of FIG. 3 and the monitor display screen of FIG. 4.

On the screen of the monitor 9, as shown in FIG. 4(A), the computer video is displayed on the entire screen, and at the same time, all or part of the video from the TV tuner 1 is displayed in the area 42.

To enlarge or reduce the image in the area 42, the user operates the mouse 8, moves the mouse point 45, which is displayed as a white arrow on the screen of the monitor 9, to the lower right corner of the area 42, and then presses the mouse 8. Begin by depressing the key provided.

After the start operation, when the user presses the control key on the keyboard 10 and moves the mouse point 45 to a new mouse point 45' as shown by the arrow 44 (step 301), the mouse point at the destination moves point 45'
position (Xl.

Y,) is read (step 302).

Then, the position (X, Y) of the mouse point 45 and the position (X, Y) of the mouse point 45' are compared, and the horizontal displacement ΔX-IX-Xo + is mixed as one of the displayed dates. It is written into the horizontal reading number counter 27 in the circuit section 16 (step 303), and the vertical displacement ΔY-I YlYo 1 is also written into the vertical reading opening number counter 28 (step 304). As a result, the display area of the superimposed video becomes an area 43 indicated by a broken line.

That is, the new display area 43 is set so that the lower right corner of the display area is located at the point indicated by the mouse point 45'.

Next, an appropriate read clock frequency set value is calculated as the display area is expanded (steps 305 and 306).

This calculation is performed using predetermined functions f (X), f2 (Y
) by respectively substituting ΔX and ΔY.

The calculation result fl (ΔX) is written to the horizontal dot clock generator 25 of the read control section 15 (step 30).
7), f2 (ΔY) is the vertical dot clock generator 26
(step 308).

Next, display data shown below is written to the write control unit 13 so that the resolution does not decrease even if the display area is expanded. That is, the oscillation frequencies of horizontal and vertical dot clocks, which are timing clocks for quantization, are determined by substituting ΔX1ΔY into predetermined functions t (X) and f4 (Y), respectively (step 30).
9.310), and write the values f (ΔX) and f4 (ΔY) to the horizontal dot clock generator 21 and vertical dot clock generator 22, respectively (steps 311 and 312).
). Furthermore, in order to ensure that the effective scanning period does not substantially change with changes in the dot clock frequency, the set values of the horizontal and vertical writing times are determined by a predetermined function f5 (
X) and f6 (Y) respectively by substituting ΔX1ΔY (steps 313 and 314), and the value f5 (
ΔX) and f6(ΔY) are written to the horizontal write number counter 23 and vertical write number counter 24, respectively.

Through this series of processing, the image in the display area 42 is enlarged and displayed in a new display area 43 without reducing the resolution, as shown in FIG. 4(A).

In this example, for simplicity, the mouse point is set from 45 to 45.
Although the explanation has been made on the assumption that the mouse point is moved instantaneously to point ', in reality, the above-mentioned operations are repeated during the movement process, and the display area changes continuously as the mouse point moves.

Further, if the space key is pressed instead of the control key in step 301 of the flowchart of FIG. 3, steps 309 to 316 are omitted.

That is, only the display data to the mixing circuit section 16 and readout control section 15 is newly provided. The monitor screen at that time is shown in FIG. 4(B). As can be seen from this figure, the image within the display area 43' becomes mosaic-like.

Although this is merely a display with a substantially reduced resolution in the display area 43', it is expected that it will be actively used in the sense that changes in images can be enjoyed.

Further, in the above embodiment, enlargement was taken as an example, but by moving the mouse point inside the original display area 42, it is possible to reduce the size.

In this embodiment, the second video signal of the video superimposing circuit 12 is obtained from the TV tuner 11, but other video signal sources include a video deck, a laser disc device, etc.

Although the designated point on the display screen is moved by operating the mouse 8, it is also possible to move it by operating the keyboard.

〔Effect of the invention〕

As explained above, according to the video processing device of the present invention,
Adjustments such as scaling of the screen on which the second video (child video) is superimposed on a part of the first video (parent video) screen can be achieved by moving the mouse point or the like. This greatly facilitates picture-in-picture image processing operations and increases the entertainment value of this type of video processing.

In addition to the above, the present invention can also be used for educational physical and chemical experiments, monitoring of factory production lines, analysis of the operation of engines such as automobiles, information processing by PC communication from all over the world, and monitoring of theatrical choreography in large sports fields. It has a wide range of applications, including as a role.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a detailed block diagram showing its internal configuration in more detail, FIG. 3 is a flowchart showing the operation of this embodiment, and FIG. 4 is a block diagram showing this embodiment. FIG. 7 is a diagram illustrating an example of a monitor display screen accompanying the example operation. DESCRIPTION OF SYMBOLS 1... Personal computer body, 2... CPU, 3... Memory, 4... Mouse interface section, 5... Keyboard interface section, 6... Memory map control section, 7... Video signal circuit Department, 8... Mouse, 9.
. . . Monitor, 10 . . . Keyboard, 11 .
6...Mixing circuit section.

Claims (1)

[Scope of Claims] 1. A video means for creating a desired video signal; a first video signal, which is a video signal created by the video means, and a second video signal supplied from the outside; a video superimposition circuit that outputs to a monitor a new video signal in which a video from a second video signal whose position, size, vertical and horizontal ratios, etc. have been adjusted based on the display data, is superimposed on the video from the signal;
point designation means for pointing to an arbitrary point on the monitor screen based on an external operation; and a second point at the position of the designated point indicated on the monitor by the point designation means
1. A video processing device comprising: calculation means for calculating the display data and providing it to a video superimposition circuit so that a predetermined portion of the video according to the video signal is displayed. 2. The video processing apparatus according to claim 1, wherein the external operation means in the point designation means is a mouse.