JPH09252440A - Superimposing device, video processing system and video processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically generate and output superimposing images suited to the aspect ratio of a screen without complicating a device or the like by selecting superimposing image signals corresponding to a discriminated screen aspect ratio and adding them to output signals from a video output device. SOLUTION: The superimposing image generation means 11 of this superimposing device 3 generates the superimposing image signals A1 -An corresponding to the respective plural screen aspect ratios. A discrimination means 12 discriminates the screen aspect ratio of a screen output device 2 based on the output signals of the video output device 1. Then, a selection means 13 selects the superimposing image signal corresponding to the discriminated screen aspect ratio among the generated superimposing image signals A1 -An corresponding to the respective plural screen aspect ratios. Further, a superimposing means 14 superimposes (adds) the selected superimposing image signal to the output signals (video signals) from the video output device 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superimposing device and an image such as an AV amplifier and an AV selector which are used by being interposed between a video output device such as a video recorder and a screen output device such as a television or a recording medium. The present invention relates to a processing system and a video processing method.

[0002]

2. Description of the Related Art In recent years, in audio products and video products (for example, video image pickup devices) having a video signal input / output function, signals such as characters are synthesized and date, time, operation state and various functions are displayed on the screen. There is known a system that superimposes information such as effects and effects, and outputs (displays or records) this on a predetermined screen output device (for example, a television or a recording medium).

By the way, in recent years, as a screen output device, one having a screen having an aspect ratio of 9:16 represented by a wide television has appeared. In this case, a superimpose image to be displayed on the upper or lower part of the screen is generated from a character generator set for a conventional television having a screen with an aspect ratio of 3: 4, and the superimposed image is displayed with an aspect ratio of 9 :. When displayed on a wide television having 16 screens, there arises a problem that the superimpose image that should be displayed at the upper or lower portion of the screen becomes invisible depending on the screen layout of the wide television.

For example, in a device called an AV surround amplifier having a superimpose function, various functions (effects and adjustment contents) need to be displayed on the screen. When a wide television having a screen with an aspect ratio of 9:16 is set to a mode for displaying the entire horizontal direction, the display is often performed.
As shown in (a), about 15% of each of the upper and lower parts of the image is cut, and part of the contents that were displayed from the top to the bottom of a conventional TV having a screen with an aspect ratio of 3: 4 I can't see it.

Further, when it is attempted to display all the contents in the height direction of the screen having an aspect ratio of 3: 4 on a wide television, FIG.
As shown in (b), the contents to be displayed in the central portion of the entire screen are displayed small.

Some wide-screen televisions have a subtitle super move function as shown in FIG. 8 (c), and this function originally displays the subtitle super outside the screen of the cinemasco version (9:16). In response to the desire to view TV images and package software (LD) on a screen as large as possible, subtitles outside the cinema screen are moved to the cinema screen and displayed, but superimpose information for AV amplifiers, etc. If is displayed up to the subtitle part, it will be moved together with the subtitle supermarket, and it will be unreadable because it overlaps with the display in the Sinesco screen.

In order to solve such a problem, conventionally, as disclosed in Japanese Patent Application Laid-Open No. 4-326261, when displaying on a wide television, a changeover switch is manually operated to superimpose. Technology to move the superimposing position by providing a detection circuit that detects when the anamorphic lens that optically changes the aspect ratio of the screen is attached with a video camera. Proposed.

[0008]

However, there are drawbacks in that it takes time and effort for the other party to move the superimposing position by operating the changeover switch, and the skill of the operator is required. In addition, when an anamorphic lens that optically changes the aspect ratio of the screen is attached, a complicated detection mechanism is required to move the position of superimposing with a detection circuit that detects that the anamorphic lens is attached. However, there was a problem that the cost increased.

The present invention is capable of automatically generating and outputting a superimpose image suitable for the aspect ratio of a screen without complicating the device, a superimposing device, a video processing system, and a video processing. It is intended to provide a way.

[0010]

In order to achieve the above object, the invention according to claim 1 provides a predetermined screen output device by adding a superimpose image signal to an output signal from a predetermined video output device. In a superimposing device for outputting a screen, a superimpose image generating means for generating a superimpose image signal corresponding to each of a plurality of screen aspect ratios, and a screen aspect ratio based on an output signal from the video output device. Of the superimpose image signal corresponding to each of the plurality of screen aspect ratios generated by the superimpose image generating means and the discriminating means for discriminating the ratio, which corresponds to the screen aspect ratio discriminated by the discriminating means. Selecting means for selecting the superimpose image signal, and the superimpose image signal selected by the selecting means. Serial is characterized by and a superimposing means for superimposing on the output signal from the video output device.

According to a second aspect of the present invention, in the superimposing apparatus according to the first aspect, at least a video signal and a sync signal are output as output signals from the video output means, and the discrimination means is The aspect ratio of the screen is determined by the presence / absence of the video signal included in the rising portion and the falling portion of the vertical synchronizing signal of the output signal from the video output device.

According to a third aspect of the present invention, in the superimposing apparatus according to the first aspect, the superimposing means outputs the superimposing image signal selected by the selecting means and the video output apparatus. It is characterized by switching and synthesizing with a video signal.

According to a fourth aspect of the present invention, there is provided a video processing system comprising a video output device and a screen output device for outputting an output signal from the video output device to a screen having a predetermined aspect ratio. A superimposing device for adding a superimpose image signal to an output signal from the video output device can be interposed between the device and the screen output device. A superimposing device that can be interposed between the superimposing image generating means for generating a superimposing image signal corresponding to each aspect ratio of a plurality of screens, and the screen output based on the output signal of the video output device. Corresponding to each of the discriminating means for discriminating the screen aspect ratio of the apparatus and the plurality of screen aspect ratios generated by the superimpose image generating means. Selecting means for selecting a superimpose image signal corresponding to the screen aspect ratio discriminated by the discriminating means from among the superimpose image signals, and outputting the superimpose image signal selected by the selecting means to the video output. And a superimposing means for adding the output signal from the device to the screen output device.

According to a fifth aspect of the present invention, there is provided a video processing method for adding a superimpose image signal to an output signal from a predetermined video output device to output the screen to a predetermined screen output device. When the output signal is output, a superimpose image signal corresponding to each of a plurality of screen aspect ratios is generated, and the screen aspect ratio is determined based on the output signal of the video output device, and the generated plurality Of the superimpose image signals corresponding to each of the screen aspect ratio of, select the superimpose image signal corresponding to the determined screen aspect ratio,
It is characterized in that the selected superposed image signal is added to the output signal from the video output device and given to the screen output device.

According to the first to fifth aspects of the invention, when the output signal is output from the video output device, a superimpose image signal corresponding to each of a plurality of screen aspect ratios is generated. A screen aspect ratio is determined based on an output signal of the video output device, and the superimpose image signal corresponding to each of the plurality of generated screen aspect ratios corresponds to the determined screen aspect ratio. By selecting the superimpose image signal and adding the selected superimpose image signal to the output signal from the video output device and giving it to the screen output device, the aspect ratio of the screen can be increased without complicating the device. It is possible to automatically generate and output a superimpose image suitable for.

[0016]

1 is a diagram showing a configuration example of a video processing system according to the present invention. Referring to FIG. 1, the video processing system includes a video output device 1 and a screen output device 2 that outputs an output signal from the video output device 1 to a screen having a predetermined aspect ratio. A superimposing device 3 for adding a superimpose image signal to an output signal from the video output device 2 can be interposed between the image output device 2 and the screen output device 2.

Here, the superimposing device 3 includes a superimposing image generating means 11 for generating superimposing image signals A _{1 to} A _n corresponding to a plurality of screen aspect ratios, and the video output device 1. Discriminating means 12 for discriminating the screen aspect ratio of the screen output device 2 based on the output signal.
And the superimpose image signals A _{1 to} A _n corresponding to each of the plurality of screen aspect ratios generated by the superimpose image generating means 11, corresponding to the screen aspect ratio discriminated by the discriminating means 12. Selection means 13 for selecting the imposing image signal, and the selection means 1
The superimpose image signal selected in 3 is superimposed on the output signal (video signal) from the video output device 1.
It is provided with a superimposing means 14 (added).

In the example of FIG. 1, the video output device 1 is
For example, when the screen output device 2 is directly connected to the video output device 1 and has terminals T _{1 to} T _n for respectively outputting output signals (video signals, synchronization signals, etc.) having a plurality of screen aspect ratios, The output device 2 includes the terminals T ₁ of the video output device _1.
To select one of T _n, and has a function of taking a signal from one terminal selected. When the superimposing device 3 is interposed between the video output device 1 and the screen output device 2, the superimposing device 3
, Has a function of selecting any _{one of the} terminals T _{1 to} T _n of the video output device 1 by the input selector means 15 and fetching a signal from the selected one terminal. .

FIG. 2 is a diagram showing a specific example of the superimposing device 3 shown in FIG. Referring to FIG. 2, the superimposing device 3 includes a video signal from the video output device 1, a synchronizing signal and the like (more specifically, a television broadcast and other composite video composed of the video signal and the synchronizing signal and the like. Signal or luminance signal) as an input signal, and a sync signal separating unit 21 for separating a horizontal sync signal H and a vertical sync signal V from the input signal from the input terminal IN.
And an aspect ratio discriminating unit 22 for discriminating the aspect ratio of the screen based on a synchronizing signal (for example, a vertical synchronizing signal V) from the synchronizing signal separating unit 21, and first and second superimposing in synchronization with the synchronizing signal. The first and second character / graphics generators 23 and 24 for generating the image signals A ₁ and A ₂ and the first and second switching control signals S ₁ and S ₂ , respectively, and the aspect ratio from the aspect ratio discriminating unit 22. The first character / figure generator 2 according to the ratio determination result.
The first superimpose image signal A ₁ and the second from 3
Selection switch 25 for selecting either one of the _second superimposed image signal A ₂ from the character / graphics generator 24 and the input terminal IN.
A changeover switch 26 for switching and synthesizing the video signal input from the switch and the superimpose image signal selected by the selection switch 25, and the first or second superimpose image signal A which is the switching control target of the changeover switch 26. _When either ₁ or A ₂ is selected, the changeover control signal of the changeover switch 26 is changed to the first, second or
Selection switch 27 for selecting which of the first and second switching control signals S ₁ and S ₂ from the character / graphics generators 23 and 24 of FIG.
The output buffer 28 outputs the video signal (image signal) from the output terminal OUT.

In the example of FIG. 2, for convenience of description, there are two types of screens and input signals: a screen and an input signal with an aspect ratio of 3: 4 and a screen and an input signal with an aspect ratio of 9:16. Therefore, the superimpose image generation means 11 includes a first character / graphics generation device 23 for generating a _first superimpose image signal A ₁ corresponding to a screen having an aspect ratio of 3: 4, and an aspect ratio. Two character / graphics generators are provided, a second character / graphics generator 24 for generating a _second superimpose image signal A ₂ corresponding to a screen having a ratio of 9:16.

FIG. 3 is a diagram for explaining the relationship between the video signal (screen) output from the video output device and the horizontal synchronizing signal H and the vertical synchronizing signal V. 3A shows the relationship between the video signal corresponding to the screen having the aspect ratio of 3: 4, the horizontal synchronizing signal H, and the vertical synchronizing signal V, and FIG. 3B shows the aspect ratio of 9 :. The relationship between the video signal corresponding to the 16 screens, the horizontal synchronizing signal H, and the vertical synchronizing signal V is shown. In the case of a screen having an aspect ratio of 3: 4, as shown in FIG. 3A, the rising portion V _S and the falling portion V _D of the vertical synchronizing signal V are
Although a video signal is included, in the case of a screen having an aspect ratio of 9:16, as shown in FIG. 3B, the rising portion V _S and the falling portion V _D of the vertical synchronizing signal V have a video image. No signal is included. Accordingly, the aspect ratio determination unit 22 can determine the screen aspect ratio by the presence or absence of the video signal contained in the rising portion V _S and the falling portion V _D of the vertical synchronizing signal V of the output signal from the video output device 1 .

FIG. 4 is a diagram showing a specific example of the aspect ratio discrimination section 22. In the example of FIG. 4, the aspect ratio discrimination unit 22 receives the vertical synchronization signal V when the vertical synchronization signal V as shown in FIG. 5A is input as the synchronization signal included in the signal from the video output device 1. A one-shot vibrator 31 that outputs a signal D ₁ as shown in FIG. 5 (b) from a rising point of V to a predetermined time T ₁ and a one-shot vibrator 31 that turns on from a rising point of the signal D ₁ to a predetermined period T ₂ The one-shot vibrator 32 that outputs the signal D ₂ as shown in FIG. 5 (c) and the one-shot vibrator 32 that remains on for a predetermined period T ₂ from the falling point of the signal D ₁ and outputs the signal D ₃ as shown in FIG. 5 (d) One-shot vibrator 33, signal D ₂ and signal D ₃
ORs the, 5 and OR circuit 34 outputs a signal D ₄ as (e), the video signal from the video output apparatus 1, the signal D ₄ is turned on shown in FIG. 5 (e) During the period (V _S , V _D in FIG. 3), the sample hold value SH from the sample hold circuit 35 is compared with the sample hold value SH from the sample hold circuit 35, and the sample hold value SH is the threshold value. When it is larger than TH, it is determined that a video signal is present while the signal D ₄ is on (the period of V _S and V _D in FIG. 3), and the aspect ratio is 3: 4.
On the other hand, when the sample hold value SH is smaller than the threshold value TH, it is determined that there is no video signal during the period when the signal D ₄ is on (the period between V _S and V _D in FIG. 3). It has a comparator 36 that determines that the aspect ratio is 9:16.

Next, the operation of the image processing system and the superimposing device 3 having such a configuration will be described. In the following, for convenience of description, the video output device 1
Has terminals T ₁ and T ₂ for respectively outputting two kinds of output signals, an output signal having a screen aspect ratio of 3: 4 and an output signal having a screen aspect ratio of 9:16, It is assumed that the superimposing device 3 is as shown in FIG.

In such a video processing system, when the superimposing image signal is not added to the video signal from the video output device 1 for screen output (for example, screen display), the superimposing device 3 is not interposed. Then, the video output device 1 and the screen output device 2 are directly connected. At this time, since two types of output signals (video signal, sync signal, etc.) having screen aspect ratios of 3: 4 and 9:16 are output from the terminals T ₁ and T _{2 of} the video output device 1, Screen output device 2
One of the two terminals T ₁ and T ₂ of the video output device 1 is selected so that the output signal corresponding to the screen aspect ratio of 1 is input to the screen output device 2. For example, the screen output device 2 is 3:
In the case of a conventional television having a screen aspect ratio of 4, the screen output device 2 selects the terminal T ₁ of the video output device 1 and outputs an output signal having a screen aspect ratio of 3: 4 from the terminal T _1. take in. Further, when the screen output device 2 is a wide television having a screen aspect ratio of 9:16, the screen output device 2 selects the terminal T ₂ of the video output device 1 and outputs the 9:16 signal from the terminal T ₂ . Capture the output signal of the screen aspect ratio.

As described above, the screen output device 2 is provided with a signal (video signal, signal corresponding to the screen aspect ratio of the screen output device 2).
Since a synchronizing signal or the like) is given from the video output device 1, a video according to the aspect ratio of the screen is correctly output (for example, displayed) on the screen of the screen output device 2.

On the other hand, when it is desired to add (for example, display) a superimposed image (information) such as characters and figures to the screen of the screen output device 2 together with the video, the video output device 1 and the video output device 1 are arranged as shown in FIG. The superimposing device 3 is interposed between the screen output device 2. At this time, since two types of output signals (a video signal, a sync signal, etc.) with a screen aspect ratio of 3: 4 and 9:16 are output from the terminals T ₁ and T _{2 of} the video output device 1, the screen One of the two terminals T ₁ and T ₂ of the video output device 1 is selected so that the output signal corresponding to the screen aspect ratio of the output device 2 is input to the superimposing device 3. For example, when the screen output device 2 is a conventional television having a screen aspect ratio of 3: 4, the superimposing device 3 selects the terminal T ₁ of the video output device ₁ and selects the terminal 3 from the terminals T _1. : Capture an output signal with a screen aspect ratio of 4: Further, when the screen output device 2 is a wide television having a screen aspect ratio of 9:16, the superimposing device 3 selects the terminal T ₂ of the video output device 1 and outputs 9:16 from the terminal T _2. Capture the output signal of the screen aspect ratio of. That is, even when the superimposing device 3 is interposed, the terminal (output signal) to be selected of the video output device 1
Must correspond to the screen aspect ratio of the image output device 2.

In this way, the predetermined terminal of the video output device 1 and the input terminal IN of the superimposing device 3 are connected, and the output terminal OU of the superimposing device 3 is connected.
The superimposing operation can be performed by connecting T and the terminal R of the screen output device 2.

That is, when an output signal (video signal, sync signal, etc.) from a predetermined terminal of the video output device 1 is input to the input terminal IN of the superimposing device 3, the sync signal separating section 21 The horizontal synchronizing signal H and the vertical synchronizing signal V are separated to separate the first and second character and figure generators 23 and 24.
And the aspect ratio discriminating unit 22.

As a result, the first and second character / graphics generators 23 and 24 synchronize with the horizontal synchronizing signal H and the vertical synchronizing signal V from the synchronizing signal separating section 21 to superimpose characters and figures. An impose image signal is output. That is, the aspect ratio of the first character / graphics generator 23 is 3:
The first superimpose image signal A ₁ corresponding to the screen of No. 4 is output, and the second superimpose image signal A 2 corresponding to the screen of the aspect ratio of 9:16 is output from the second character / graphics generator 24. A ₂ outputs. In addition, the aspect ratio determination unit 22
Then, as described above, the output signal from the video output device 1
Whether the output signal from the video output device 1 has an aspect ratio of 3: 4 based on (vertical synchronization signal V and video signal),
It is determined whether the aspect ratio is 9:16.

In this way, when the aspect ratio discriminating section 22 discriminates whether the output signal from the video output device 1 has an aspect ratio of 3: 4 or an aspect ratio of 9:16, the signal is output. The determination results are given to the selection switches 25 and 27, respectively, and the selection switch 25 generates the first and second superimpose image signals A ₁ and A 2 generated from the first and second character and figure generators 23 and 24, respectively. of a _2, selects one superimposed image signal corresponding to the determination result to be provided to the change-over switch 26. Further, in the selection switch 27, the first and second character / graphics generators 23, 2
Of the first and second changeover control signals S ₁ and S ₂ respectively generated from 4, the one changeover control signal corresponding to the discrimination result is selected and given to the changeover switch 26.

FIG. 6 is a time chart showing an example of switching and synthesizing the video signal and the superimpose image signal by the changeover switch 26. FIG. 6A shows the video signal from the video output device 1. Shown in FIG. 6 (b),
The superimposed image signal selected by the selection switch 25 is shown. When the selected superimpose image signal is as shown in FIG. 6B, the selection switch 27
6C, the changeover control signal as shown in FIG. 6C is selected and added to the changeover switch 26. As a result, the changeover switch 26 causes the changeover control signal of FIG. 6C to be L (low level).
6A, the video signal of FIG. 6A is switched to output to the output terminal OUT, and when the switching control signal of FIG. 6C is H (high level), the superin of FIG. 6B is selected. The pause image signal is switched to be output to the output terminal OUT. This allows the output terminal OUT to output a video as shown in FIG. 6D (that is, a composite video of the video signal and the superimposed image signal).

As described above, the changeover switch 26 selects the video signal from the video output device 1 and the superimpose image signal selected by the selection switch 25 from the selection switch 27.
By switching by the switching control signal selected in step 1, these can be combined, output from the output terminal OUT to the screen output device 2, and the screen output device 2 can output the screen.

More specifically, when the superimposing device 3 is used in a system having a screen aspect ratio of 3: 4 (video output device 1, screen output device 2), for example,
The aspect ratio discriminating unit 22 of the superimposing device 3 discriminates that the output signal from the video output device 1 has an aspect ratio of 3: 4, and accordingly, the selection switch 25.
Selects the _first superimpose image signal (aspect ratio of 3: 4) A ₁ generated from the first character / graphics generator 23, and applies this to the changeover switch 26. First generated from the first character / graphics generator 23
Changeover control signal S ₁ is selected and this is changed over to the changeover switch 26.
Give to. As a result, the changeover switch 26 controls the video signal (aspect ratio of 3: 4) from the video output device 1 and the first superimpose image signal selected by the selection switch 27.
(3: 4 aspect ratio) A ₁ is switched by the switching control signal S ₁ selected by the selection switch 27 to combine them, and a screen output device having a 3: 4 screen aspect ratio from the output terminal OUT. 2 and the screen output device 2 can output the screen.

Further, the superimposing device 3 is
For example, when used in a system having a screen aspect ratio of 9:16 (video output device 1, screen output device 2), in the aspect ratio discrimination unit 22 of the superimposing device 3, the output from the video output device 1 is output. It is determined that the signal has an aspect ratio of 9:16, and accordingly, the selection switch 25 causes the second superimposing image signal (9:16 aspect ratio) generated from the second character / graphics generator 24. ) Select A ₂ ,
This is given to the changeover switch 26, and the selection switch 27
Selects the second changeover control signal S ₂ generated from the second character / graphics generating device 24, and supplies this to the changeover switch 26. As a result, the changeover switch 26 switches the video signal (9:16 aspect ratio) from the video output device 1 to the selection switch 2.
Second superimposed image signal selected in 7
(9:16 aspect ratio) A ₂ is switched by the switching control signal S ₂ selected by the selection switch 27 to synthesize them, and a screen output device having a screen aspect ratio of 9:16 from the output terminal OUT. 2 and the screen output device 2 can output the screen.

As described above, according to the superimposing device 3 of the present embodiment, the video output device 1 and the screen output device 2
When a screen aspect ratio of 3: 4 is used, superimposing for a screen aspect ratio of 3: 4 can be automatically performed, and the video output device 1 and the screen output device 2 can be used. When a screen aspect ratio of 3: 4 is used, superimposing for a screen aspect ratio of 3: 4 can be automatically performed.

In the above configuration example, the video output device 1 has the terminals T _{1 to} T _n for respectively outputting the output signals having a plurality of screen aspect ratios, but the video output device 1 has one type of screen. The present invention can be similarly applied even if only an output signal having an aspect ratio is output. However, in this case,
As the video output device 1, a device that outputs an output signal having the same screen aspect ratio as the screen aspect ratio of the screen output device 2 needs to be used.

FIG. 7A shows a video processing system having a video output device 1 and a screen output device 2 for a screen aspect ratio of 3: 4, and FIG. 7B shows 9: A video processing system having 16 video output devices 1 and 2 for a screen aspect ratio is shown.

Superimposing device 3 of this embodiment
As can be seen from the above description, can be used in both the video processing system of FIG. 7 (a) and the video processing system of FIG. 7 (b). However, there is no need to perform manual switching or the like as in the conventional case. That is, without providing a complicated mechanism, the screen aspect ratio of the system can be automatically determined, and the superimposing adapted to the screen aspect ratio of each system can be automatically performed. In other words, when the input signal has an aspect ratio of 9:16, superimpose for 9:16 is automatically performed, and when the input signal has an aspect ratio of 3: 4, superimpose for 3: 4 is automatically performed. This makes it easy to see the screen of any type of television connected to the superimposing device 3 and synthesizes a superimpose screen which does not cause any inconvenience on the screen by the function of the television. be able to.

As described above, according to the present embodiment, the output signal of the video output device 1 is combined with the output signal of the superimposing device 3 to produce a screen output device having a screen ratio of 3: 4 (for example, a conventional television). When connecting to a screen output device (for example, a wide television) 2 having a screen ratio of 2 or 9:16 and performing screen output (for example, screen display), the screen output device (for example, screen output device 1 It is possible to determine the screen ratio of the (TV) 2 and automatically select a superimpose signal that matches the screen ratio of the screen output device (TV) 2 and synthesize this with a video signal for output (eg, display). it can.

[0040]

As described above, according to the first to fifth aspects of the present invention, when the output signal is output from the video output device, the superincorresponding to each of a plurality of screen aspect ratios is displayed. Generates a pose image signal,
A screen aspect ratio is determined based on an output signal of the video output device, and a superimpose image signal corresponding to each of the plurality of generated screen aspect ratios corresponding to the determined screen aspect ratio is selected. Since an imposing image signal is selected and the selected superimposing image signal is added to the output signal from the video output device and given to the screen output device, the screen aspect ratio of the image processing system used. However, it is possible to automatically generate and output a superimpose image suitable for the aspect ratio of the screen without complicating the device.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a video processing system according to the present invention.

FIG. 2 is a diagram showing a specific example of the superimposing device of FIG.

FIG. 3 is a diagram for explaining a relationship between a video signal (screen) output from a video output device and a horizontal synchronizing signal H and a vertical synchronizing signal V.

FIG. 4 is a diagram showing a specific example of an aspect ratio determination unit.

FIG. 5 is a time chart for explaining the operation of the aspect ratio determination unit.

FIG. 6 is a time chart for explaining the operation of the changeover switch.

FIG. 7 is a diagram illustrating a configuration example of a video processing system.

FIG. 8 is a diagram for explaining a case where display of superimpose information is inconvenient due to a difference in screen aspect ratio or the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 video output device 2 screen output device 3 superimposing device 11 superimposing image generating means 12 discriminating means 13 selecting means 14 superimposing means 21 sync signal separating section 22 aspect ratio discriminating section 23 first character graphic generating apparatus 24 Second character / figure generator 25 Selection switch 26 Changeover switch 27 Selection switch 28 Output buffer

Claims (5)

[Claims] 1. A superimposing device for adding a superimpose image signal to an output signal from a predetermined video output device to output a screen to a predetermined screen output device, corresponding to each of a plurality of screen aspect ratios. A superimpose image generating means for generating a superimpose image signal, a discriminating means for discriminating a screen aspect ratio based on an output signal from the video output device, and a plurality of superimpose image generating means. Selecting means for selecting the superimpose image signal corresponding to the screen aspect ratio discriminated by the discriminating means among the superimpose image signals corresponding to the respective screen aspect ratios, and the superimpose selected by the selecting means. A superimpose that superimposes an image signal onto the output signal from the video output device. A superimposing device comprising: an imposing means. 2. The superimposing apparatus according to claim 1, wherein an output signal from the video output means is:
At least a video signal and a synchronization signal are output, and the determination means determines the screen aspect ratio based on the presence or absence of the video signal included in the rising portion and the falling portion of the vertical synchronization signal of the output signal from the video output device. Characteristic superimposing device. 3. The superimposing apparatus according to claim 1, wherein the superimposing means switches the superimposing image signal selected by the selecting means and the video signal from the video output apparatus to synthesize them. A superimposing device characterized by this. 4. A video processing system comprising: a video output device; and a screen output device for outputting an output signal from the video output device to a screen having a predetermined aspect ratio. It is possible to interpose a superimposing device for adding a superimpose image signal to the output signal from the video output device, and the superimposing device can be interposed between the video output device and the screen output device. The device determines a screen aspect ratio of the screen output device based on an output signal of the video output device and a superimpose image generation means for generating a superimpose image signal corresponding to each aspect ratio of a plurality of screens. The determining means and the superimpose image signal corresponding to each of the plurality of screen aspect ratios generated by the superimpose image generating means. Selecting means for selecting a superimpose image signal corresponding to the screen aspect ratio discriminated by the discriminating means, and a superimpose image signal selected by the selecting means as an output signal from the video output device. And a superimposing means for adding to the screen output device. 5. A video processing method for adding a superimpose image signal to an output signal from a predetermined video output device to output a screen to a predetermined screen output device, when the output signal is output from the video output device, The superimpose image signal corresponding to each of the plurality of screen aspect ratios is generated, the screen aspect ratio is determined based on the output signal of the video output device, and each of the generated plurality of screen aspect ratios is supported. The superimpose image signal corresponding to the determined screen aspect ratio is selected from the selected superimpose image signals, and the selected superimpose image signal is added to the output signal from the video output device to output the screen. An image processing method characterized by being provided to a device.