JPH10136257A - Signal transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the functions of a video switcher for compilation, for live and for transmission and to improve operability by switching the functions of a signal processing means in accordance with the purpose switching of a selection bus line. SOLUTION: A function mode change-over switch 8 is provided on the control panel 7 of the video switcher. It is operated by a user and it is the change-over switch for selecting at least three functions for live and for compilation (compilation modes E1 and E2). One of the three functions is selected, and a signal (function selection signal) corresponding to the function selection state is outputted to CPU 11. CPU 11 on/off-controls switch elements on the respective cross points XP of matrix switches MS1 and M2 in accordance with the functions shown by a function selection signal and controls a video signal processing in M/E amplifiers 14 and 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal transmitting apparatus for performing predetermined signal processing such as a special video effect on a signal selected from a plurality of input signals such as a video signal and transmitting the signal.

[0002]

2. Description of the Related Art A plurality of video signals are used as input signals,
2. Description of the Related Art Conventionally, a video signal transmitting device that performs a video special effect process or the like on the plurality of video signals and transmits the processed video signal, that is, a so-called video switcher, has been conventionally called relay (for live), editing, and transmission. In particular, there are devices each having a function according to the purpose of use.

FIG. 12 shows the basic configuration of the live video switcher.

In FIG. 12, video materials # 1 to # 6
Is a video signal supplied from, for example, a plurality of video cameras and video tape recorders. The A bus and the B bus are bus lines provided for synthesizing two video materials, the program bus is a bus line for selecting a video signal used on-air (during broadcast), and the preset bus is a This is a bus line provided for a video check for switching.

The A bus and the B bus are connected to a mix / effect amplifier (hereinafter, referred to as an M / E amplifier) 105 for performing various video special effects such as video synthesis, and are connected to a program bus and a preset bus. Also M / E
The amplifier 106 is connected. The above M / E amplifier 10
In the program output bus 6, the video selected by the program bus is led to the program output terminal 107, and in the preset output bus, the video selected by the preset bus is guided to the preset output terminal 108.

The matrix switches MS _L and ms _L
Is provided with a switch element at each cross point XP, which is an intersection of the buses. By controlling ON / OFF (open / close) of these switch elements, connection or opening of the corresponding bus is performed. Is what you do.
The matrix switch MS _L is provided at each cross point X
By turning on / off the switch element of P, connection or disconnection between the video buses of the video materials # 1 to # 6 and the A bus, B bus, program bus, and preset bus is performed. The matrix switch ms _L turns on / off the switch element at each cross point XP, thereby obtaining the M
The connection / disconnection between the output video of the / E amplifier 105 and the above-mentioned program bus and preset bus is performed.

Here, for example, the program output terminal 10
7, a video signal of the video material # 2 is transmitted as an on-air signal, and thereafter, a video signal (eg, video material # 1 and video material # 5) to which a special effect such as a so-called wipe process or a mix process is applied. In such a case, the live video switcher shown in FIG. 12 operates as follows.

[0008] First, in order to on-air video signals of the video material # 2, in the matrix switch MS _L, connects the cross-point XP between the video bus of the program bus and picture material # 2. This allows
The video signal of the video material # 2 is sent to the M / E amplifier 106. M / E amplifier 10 at this time
6, the video signal of the video material # 2 is extracted as an on-air video signal.

Next, while the video signal of the video material # 2 is on air, the matrix switch MS _L
In the above, by connecting the cross point XP between the A bus and the video bus of the video material # 1 and connecting the cross point XP between the B bus and the video bus of the video material # 5, The video signals of the video materials # 1 and # 5 are sent to the / E amplifier 105. As a result, the M / E amplifier 105 performs a wipe process, a mix process, and the like using the video material # 1 and the video material # 5, and outputs the obtained signal as a video signal of a special effect. .

At this time, the matrix switch ms _L
, A cross point XP between the output bus of the M / E amplifier 105 and the preset bus is connected. As a result, the video signal of the special effect is extracted from the M / E amplifier 106, and is output as the preset output terminal 1 as the video signal before the video signal of the special effect is turned on.
08.

By checking the video signal output from the preset output terminal 108, if the video signal of the special effect can be on air, for example, in the M / E amplifier 106 (or the M / E amplifier) Switching between the video material # 2 and the video signal of the special effect is performed in a fader provided at a stage subsequent to the amplifier 106).

Thus, the video signal to be aired is switched from the video material # 2 to the video signal of the special effect.

As described above, the live video switcher is interposed at the time of on-air. For this reason, when a certain video is switched to another video and the video is on-air, when the another video is a video generated by performing a special effect such as a so-called wipe process or a synthesis process, the video is on-air. Since a check needs to be performed beforehand, the live video switcher is provided with a bus called the preset bus as a bus for performing this check. This preset bus is an indispensable bus for a live video switcher. The live video switcher also needs at least the two buses A and B as described above as buses for performing special effect processing on video.

FIG. 13 shows a basic configuration of the video switcher for editing.

In FIG. 13, video materials # 1 to # 6
Is a video signal supplied from a plurality of video cameras, video tape recorders and the like as described above. The key bus is a bus through which a signal for clipping (key signal: KEY signal) for synthesizing into a screen is transmitted, and the fill bus is a video signal (fill signal) to be fitted into the clipped portion by the key signal. This is a bus through which a signal (FILL signal) is transmitted.

An M / E amplifier 115 is connected to the key bus, fill bus, program bus, and preset bus. The program output bus of the M / E amplifier 115 is connected to the program output terminal 107.

The matrix switch MS _E is provided with switch elements at each cross point XP, which is the intersection of each bus, and controls on / off (open / close) these switch elements. To connect or open the corresponding bus. That is, the matrix switch MS _E is connected to each cross point XP.
Are turned on / off to connect or disconnect the video buses of the video materials # 1 to # 6 with the key bus, fill bus, program bus, and preset bus.

Here, for example, the video signal of the video material # 1 is used as a key signal, the video signal of the video material # 6 is used as a fill signal, and the video signal obtained by the key signal and the fill signal is used as a video signal, for example. In the case of combining with the video signal of # 5 and programming out, the editing video switcher shown in FIG. 13 operates as follows.

First, in the matrix switch MS _E , the cross point XP between the key bus and the video bus of the video material # 1 is connected, and the cross point XP between the fill bus and the video bus of the video material # 6 is connected. Connect XP. As a result, the video signal of the video material # 1 is supplied to the M / E amplifier 115 as the key signal,
The video signal of the video material # 6 is supplied as the fill signal.

In the M / E amplifier 115 to which the key signal and the fill signal are supplied, the video in which the video signal of the video material # 6 as the fill signal is embedded in the video of the video material # 1 as the key signal. Generate a signal.

At this time, the matrix switch M
In _SE , the program bus and the video material #
5 is connected to the cross point XP.
As a result, the video signal of the video material # 5 is supplied to the M / E amplifier 115. The M / E amplifier 11
In step 5, the key signal and the fill signal are combined with the video material # 5, and the obtained video signal is output to the program output terminal 116.

As described above with reference to FIGS. 12 and 13, the M / E amplifier of the live video switcher mainly performs special effects processing such as wipe and mix, and the M / E amplifier of the editing video switcher performs keying. The conventional video switcher has a fixed M / E amplifier configuration for live and editing.

The transmission video switcher handles both video and audio, and this transmission video switcher also has a different configuration from those for live and editing.

[0024]

As described above, the video signal transmitting devices for live, editing, and transmitting are generally summarized under the name of the video switcher. Therefore, it is difficult to convert one video switcher to another application.

It is costly to arrange all of these video switchers, and inevitably increases the size of the equipment, and requires a large space for installation.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a signal transmission device having functions of a video switcher for editing, live, and transmission. At present, there are some video switchers manufactured for editing that also try to be used for live, but this is done, for example, by changing the bus wiring for editing and for live. This is a very inconvenient video switcher. Therefore, one of the objects of the present invention is to improve the usability.

[0027]

According to the present invention, there is provided a signal transmitting apparatus comprising: a plurality of signal bus lines to which input signals are respectively supplied; and switch elements which are respectively opened / closed at intersections of the signal bus lines. A plurality of selection bus lines for selecting an input signal on each signal bus line, and signal processing means for performing predetermined signal processing using the input signal selected by each of the selection bus lines, The above-mentioned problem is solved by having switching control means for switching and controlling the use of each selection bus line and the function of the signal processing means.

That is, according to the present invention, the use of the selection bus line can be switched without fixing, and the function of the signal processing means can be switched according to the switching of the use of the selection bus line. I have.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a basic configuration of a video switcher which is an embodiment of a video signal transmitting apparatus according to the present invention.

The video switcher shown in FIG. 1 switches the function of a bus and the function of a mix / effect (M / E) amplifier depending on the purpose of use (for live or editing).
It can be used for live, editing, and even sending. The switching of the use and the function is performed by a function mode changeover switch, which will be described later, and the switching operation of the function mode changeover switch can be performed by the user according to the intended use. The function of the M / E amplifier is controlled by software, as described later, according to the function selected by the function mode switch.

In FIG. 1, video materials # 1 to # 4
Is a video signal supplied from, for example, a plurality of video cameras and video tape recorders. Of the A bus / key bus and B bus / fill bus, the A bus and the B bus are bus lines provided for synthesizing two video materials as described above, and the key bus is a clipping signal as described above. (A key signal: a KEY signal) is transmitted through the bus line, and a fill bus is a bus line through which the aforementioned fitting signal (a fill signal: the FILL signal) is transmitted. The program bus is a bus line for a video signal to be on-air or programmed out, and the preset bus is a bus line provided for checking a video.

The A bus / key bus, the B bus / fill bus, the program bus, and the preset bus are connected to the M / E amplifier 55 for performing various video special effects such as wipe, mix, and keying as described above. The M
The preset output bus of the / E amplifier 55 is connected to the preset output terminal 56, and the program output bus is connected to the program output terminal 57. In the following description, the video signal of the program bus is referred to as a program video signal, and an image generated from the program video signal is referred to as a program image. Also, the video signal obtained by the above-described wipe processing, mixing processing, and the like is called a WM effect video signal, and an image generated from the WM effect video signal is called a WM effect image. An image generated from the K / F effect image signal is called a K / F effect image signal. Further, an image displayed on the display device (display) connected to the video switcher according to the present embodiment before the air is turned on is called a preset image, and its video signal is called a preset video signal.

The matrix switch MS shown in FIG. 1 is provided with switch elements at each cross point XP, which is the intersection of each bus, and controls ON / OFF (open / close) of these switch elements. To connect or open the corresponding bus. That is, the matrix switch MS turns on / off the switch element of each cross point XP, thereby turning on the video material # 1.
# 4 to # 4 are connected to or released from the A bus / key bus, B bus / fill bus, program bus, and preset bus.

Although the A bus / key bus and B bus / fill bus are not shown in FIG. 1, their uses are switched by a function mode changeover switch, which will be described later. When switched, the A bus / key bus is used as the A bus, and the B bus / fill bus is used as the B bus. When the application is switched for editing, the A bus / key bus is used as the key bus. In addition, the B bus / fill bus is used as a fill bus.

The case where the video switcher of FIG. 1 is used for live will be described below.

Here, for example, a video signal of video material # 1 is transmitted from the program output terminal 57 as an on-air signal, that is, a program video signal, and thereafter, for example, a wipe process from video material # 3 and video material # 4 is performed. A case where a WM effect video signal subjected to a mix process or the like is transmitted will be described as an example.

When this video switcher is used for live use, an image displayed on one screen of a display device (display) connected to the video switcher is, for example, as shown in FIG. The display image shown in FIG. 2 shows a state where the on-air program image and the on-air preset image are simultaneously displayed on one screen. In the display area indicated by D _A in FIG. 2, a video signal from the A bus / key bus used as the A bus (a video signal of video material # 3 in this example)
There appears, the video signal from the B bus / fill bus used as a B bus to the display region indicated by reference numeral D _B (video signal of video material # 4 in this example) is displayed. Image of the display region D _A and D _B are the preset image. In the display area indicated by D _PGM in FIG. 2, a video signal (the video signal of video material # 1 in this example) from the program bus is displayed. This display area D _PGM
Is the program image.

First, the A bus / key bus functions as an A bus and a B
The bus / fill bus is switched to function as a B bus. Here, in order to make the program video signal of the video material # 1 on-air, a cross point XP between the program bus and the video bus of the video material # 1 is connected in the matrix switch MS of FIG. As a result, the video signal of the video material # 1 is sent to the M / E amplifier 55. M at this time
The / E amplifier 55 outputs a program video signal (the display area D in FIG. 2) in which the video signal of the video material # 1 is turned on.
_PGM program image).

Next, while the program video signal of the video material # 1 is on air, the matrix switch MS connects the A bus / key bus functioning as the A bus and the video bus of the video material # 3. By connecting the cross point XP between the B bus / fill bus functioning as the B bus and the video bus of the video material # 4.
The video signals of the video materials # 3 and # 4 are sent to the amplifier 55. As a result, the M / E amplifier 55 outputs a WM effect video signal obtained by performing a wipe process, a mix process, and the like using the video material # 3 and the video material # 4. The WM effect video signal of the M / E amplifier 55 is sent to the preset output terminal 56 as a video signal before being turned on air.

The check Displaying check WM effects video signal outputted from the preset output terminal 56, that is, to for example the display device preset image the WM effect image (display region D _A and the image consisting of D _B of FIG. 2) By doing so, if the WM effect image can be aired, for example,
In the E amplifier 55 (or in a fader provided at the subsequent stage of the M / E amplifier 55), the video material #
1 is switched between the program video signal and the WM effect video signal.

Thus, the video signal to be aired is converted from the program video signal of the video material # 1 by the W signal.
It will be switched to the M effect video signal.

When the video switcher shown in FIG. 1 is used for live as described above, the M shown in FIG.
/ E amplifier 55 includes two M / E amplifiers 14 and 19 and two cross points XP as shown in FIG.
It operates as a matrix switch ms having (switch elements).

In the M / E amplifier 55 shown in FIG. 2, when the program video signal of the video material # 1 is on-air as in the above example, the matrix switch m
The switch element of each cross point XP of s is open, and therefore, the M / E amplifier 19 is supplied with the video signal of the program bus, that is, the program video signal of the video material # 1.

Next, as in the example described above, video material # 3
When generating a WM effect image from # and # 4, M / E
The video signal of the video material # 3 is supplied to the amplifier 14 via the A bus / key bus functioning as the A bus, and the video material is transmitted via the B bus / fill bus functioning as the B bus. The video signal of # 4 is supplied. Therefore, the M / E amplifier 14 outputs a WM effect video signal obtained by wiping or mixing the video material # 3 and the video material # 4.

At this time, in the matrix switch ms, the cross point XP between the output bus of the M / E amplifier 14 and the preset bus is connected. As a result, the WM effect video signal is extracted from the M / E amplifier 14 and sent to the preset output terminal 56 as a preset video signal before the WM effect video signal is turned on.

By checking the WM effect image (ie, the preset image) output from the preset output terminal 56, if the WM effect image can be aired, for example, the M / E amplifier 1
At 9, the switching between the program video signal of the video material # 1 and the WM effect video signal is performed.

Next, a case where the video switcher of FIG. 1 is used for editing will be described. Here, in the video switcher of the present embodiment, two types of modes (editing modes E1 and E2 described later) can be used for editing. The edit mode E1 is an edit mode in which the K / F effect image is combined with a program image and combined with a preset image, and the edit mode E2 is a K / F effect image on the combined image of the program image and the preset image.
This is an editing mode in which an F effect image is synthesized.

First, the editing mode E1 will be described.

For example, the video signal of the video material # 2 is used as a key signal, the video signal of the video material # 3 is used as a fill signal, and the video signal obtained by the key signal and the fill signal is used as a video as a program image, for example. A description will be given of an example in which a video signal of the video material # 1 is combined with the video signal of the video material # 4 and programmed out, and the preset image is a video signal of the video material # 1. When this video switcher is used in the editing mode E1, a display device (display) connected to the video switcher is used.
The image displayed on one screen is, for example, as shown in FIG. A program video signal (a video signal of video material # 4 in this example) is displayed in a display area indicated by D _PGM in FIG. 4 and is used as a key bus in a display area indicated by D _{K / F in} FIG. The video signal from the A bus / key bus (the video signal of the video material # 2 in this example) and the video signal from the B bus / fill bus used as the fill bus (the video of the video material # 3 in this example) The K / F effect image new generated from the signal is displayed. The preset video signal (the video signal of video material # 1 in this example) is displayed in a display area indicated by D _PST in FIG.

In the case of the editing mode E1, in the video switcher of FIG. 1, the A bus / key bus functions as a key bus and B
The bus / fill bus is switched to function as a fill bus. Here, in the matrix switch MS, a cross point XP between the key bus and the video bus of the video material # 2 is connected, and a cross point XP between the fill bus and the video bus of the video material # 3 is connected. I do. As a result, the video signal of the video material # 2 is supplied to the M / E amplifier 55 as a key signal, and the video signal of the video material # 3 is supplied as a fill signal.

In the M / E amplifier 55 to which the key signal and the fill signal are supplied, the video signal of the video material # 3 as the fill signal is inserted into the video of the video material # 2 as the key signal. / F effect video signal (video signal of the display area _{DK / F in} FIG. 4) is generated.

At this time, the matrix switch M
In S, the program bus and the video material # 4
Cross point XP between the video bus and the video bus. As a result, the M / E amplifier 55 has the video material #
4 are supplied. In addition, the M /
The preset video signal of the video material # 1 is also supplied to the E amplifier 55, so that the M / E amplifier 5
5, a video signal obtained by synthesizing a K / F effect video signal on the program video signal (display area D _{PGM in} FIG. 4)
And D _{K / F} of the video signal) with a preset image signal (video signal of the display region D _PST in FIG. 4) and the video signal that combines is output.

As described above, when the video switcher shown in FIG. 1 is used for editing in the edit mode E1, the M / E amplifier 55 shown in FIG. 1 specifically uses two M / E amplifiers as shown in FIG. / E amplifiers 14 and 19 operate.

That is, in the M / E amplifier 55 functioning as the configuration shown in FIG. 5, the video signal of the video material # 2 is used as the key signal and the video signal of the video material # 3 is used as the fill signal as in the above-described example. In order to combine the K / F effect video signal obtained from these with the program video signal of the video material # 4, the M / E amplifier 14 supplies the key signal of the video material # 2 and the fill signal of the video material # 3. A signal and a program video signal of the video material # 4 are supplied.
The M / E amplifier 14 inserts the fill signal of the video material # 3 into the key signal of the video material # 2 and
An F effect video signal (a video signal of the display area _{DK / F in} FIG. 4) is generated, and the K / F effect video signal is combined with the program video signal of the video material # 4 to produce a display area in FIG. A video signal of D _PGM and D _{K / F} is generated, and this video signal is sent to the M / E amplifier 19.

The M / E amplifier 19 has the video material # 1
Preset video signals are also supplied, so
The M / E amplifier 19 combines the video signal sent from the M / E amplifier 14 with the preset video signal of the video material # 1.

Next, the operation in the edit mode E2 will be described.

In the editing mode E2, for example, the video signal of video material # 2 is used as a key signal, and
3 as a fill signal, and converts the key signal and the K / F effect video signal obtained by the fill signal into a video signal of a video material # 4 as a program image and a video material # 1 as a preset image, for example. Join. When the video switcher is used for editing in the editing mode E2, an image displayed on one screen of a display device (display) connected to the video switcher is, for example, as shown in FIG. . A program video signal (video signal of video material # 4) is displayed in a display area indicated by D _PGM in FIG. 6 and the above-mentioned A used as a key bus in a display area indicated by D _{K / F in} FIG. K / F generated from a video signal from the bus / key bus (video signal of video material # 2) and a video signal from the B bus / fill bus used as a fill bus (video signal of video material # 3) The effect video signal is displayed, and the preset video signal (video signal of video material # 1) is displayed in a display area indicated by D _{PST in the} figure.

Also in the editing mode E2, in the video switcher of FIG. 1, the A bus / key bus functions as a key bus by a function mode changeover switch described later.
The B bus / fill bus is switched to function as a fill bus. In the matrix switch MS, a cross point XP between the key bus and the video bus of the video material # 2 is connected, and a cross point XP between the fill bus and the video bus of the video material # 3 is connected. Thus, the video signal of the video material # 2 is supplied to the M / E amplifier 55 as the key signal, and the video signal of the video material # 3 is supplied as the fill signal.

In the M / E amplifier 55 to which the key signal and the fill signal are supplied, the K signal in which the video signal of the video material # 3 is inserted into the video of the video material # 2 being the key signal. / F effect video signal (the video signal of the display area _{DK / F in} FIG. 6) is generated.

At this time, the matrix switch M
In S, the program bus and the video material # 4
And the cross point XP between the preset bus and the video bus of the video material # 1 are connected. As a result, the M / E amplifier 55 is supplied with the program video signal of the video material # 4 and the preset video signal of the video material # 1.

In the M / E amplifier 55, the program video signal of the video material # 4 and the preset video signal of the video material # 1 are combined, and the K / F is added to the obtained video signal.
Synthesize the effect signal. Thus, a display pixel as shown in FIG. 6 is obtained.

As described above, when the video switcher shown in FIG. 1 is used for editing in the editing mode E2, the M / E amplifier 55 shown in FIG. 1 specifically uses two M / E amplifiers as shown in FIG. / E amplifiers 14 and 19 operate.

That is, in the M / E amplifier 55 functioning as the configuration shown in FIG. 7, the video signal of the video material # 2 is used as the key signal, and the video signal of the video material # 3 is used as the fill signal, as in the above-described example. To combine the K / F effect video signal obtained from these with the program video signal of the video material # 4 and the preset video signal of the video material # 1, the M / E amplifier 14 stores the program of the video material # 4. A video signal and a preset video signal of the video material # 1 are supplied. The M / E amplifier 14 combines the program video signal and the preset video signal and sends the obtained video signal to the M / E amplifier 19.

The key signal of the video material # 2 and the fill signal of the video material # 3 are also supplied to the M / E amplifier 19. In the M / E amplifier 19, the video material # 2
The K / F effect video signal (display area D _{K / F in} FIG. 6)
The K / F effect video signal is synthesized with the video signal from the M / E amplifier 14. As a result, an image as shown in FIG. 6 is obtained.

As described above, according to the video switcher of the embodiment of the present invention, by switching the use of the bus line and the function of the M / E amplifier having the basic configuration of FIG.
It is possible to correspond to various uses such as live use.

Next, a specific configuration example of a video switcher that realizes all the basic configurations of the above-described embodiment of the present invention is shown in FIG.
Shown in

In FIG. 8, video materials # 1 to # 12
Is a video signal supplied from, for example, a plurality of video cameras and video tape recorders. Of the A bus / key bus and the B bus / fill bus, the A bus and the B bus are bus lines provided for synthesizing two video materials as described above, and the key bus is a clipping line as described above. A signal (key signal: KEY signal) is supplied to the bus line, and a fill bus is a bus line to which the above-described fitting signal (fill signal: FILL signal) is supplied. The program bus is a bus line for a video signal to be aired or programmed out. The preset bus is a bus line for a preset video signal. Further, the effect bus is provided as a bus line for the WM effect video signal and the K / F effect video signal.

On the other hand, among the four buses for inputting video signals to the M / E amplifiers 14 and 19 (hereinafter referred to as α bus, β bus, γ bus, and σ bus), the α bus is an A bus / fill bus. / Preset bus, β bus is used as B bus / program bus / program bus, γ bus is used as preset bus or any of effect bus / effect bus / effect bus Bus line. That is, when the video switcher of FIG. 8 is used for live use, of these four buses, the α bus is used as the A bus, the β bus is used as the B bus, the γ bus is used as the preset bus or the effect bus, and A bus is used as a program bus or an effect bus. For example, when the video switcher of FIG. 8 operates in the edit mode E1, the α bus is used as a fill bus, the β bus is used as a program bus, the γ bus is used as a preset bus, and the σ bus is used as an effect bus. . Further, for example, when the video switcher of FIG. 8 operates in the edit mode E2, the α bus is used as a preset bus, the β bus is used as a program bus, the γ bus is used as a fill bus, and the σ bus is used as an effect bus. .

The above-mentioned A bus / key bus, B bus / fill bus, program bus, preset bus, and each video bus of the video materials # 1 to # 12 can be connected by a matrix switch MS1. The matrix switch MS1 is provided with switch elements at each cross point XP, which is the intersection of the buses. By controlling on / off (open / close) of these switch elements, the corresponding bus is switched. Connection or disconnection. That is, the matrix switch MS
1 is to turn on / off the switch element of each cross point XP, and to set each video bus of the video materials # 1 to # 12 and the A bus / key bus, B bus / fill bus, program bus and preset bus. Connection or disconnection.

The A bus / key bus and B bus /
Fill bus, program bus, preset bus and the above effect bus, and the above α bus, β bus, γ bus, δ
The bus can be connected by a matrix switch MS2. The same applies to the matrix switch MS2.
A switch element is provided at each cross point XP, which is an intersection of the buses. By controlling ON / OFF (open / close) of these switch elements, connection or opening of the corresponding bus is performed. Things. That is, the matrix switch MS2 turns on / off the switch element of each cross point XP, and thereby the A bus / key bus, B bus / fill bus, program bus, preset bus, the effect bus, the α bus, β Connects to or disconnects from the bus, γ bus, and δ bus.

The α bus and β bus are connected to video signal input terminals 34 and 35 of the M / E amplifier 14, and the effect bus is connected to a video signal output terminal 38 of the M / E amplifier 14. The γ bus and δ bus are E
/ M amplifier 19 is connected to video signal input terminals 44 and 45, and the video signal output terminal 48 of the M / E amplifier 19 is
It is connected to the output terminal 22 provided as the preset output terminal 56 and the program output terminal 57 in FIG.

Here, in the configuration shown in FIG. 8, as described above, means for realizing the use of the A bus / key bus and the B bus / fill bus and switching the functions of the M / E amplifiers 14 and 19 are realized. As a main component, a function mode changeover switch 8 and a CPU (central processing unit) 11 are provided.

The function mode changeover switch 8 is provided, for example, on the control panel 7 of the video switcher, and is operated by the user. That is, the function mode changeover switch 8 is a changeover selection switch for selecting at least three functions for live and edit (edit mode E1 and edit mode E2), and these three modes are operated by the user. When any one of the functions is selected, a signal (hereinafter, referred to as a function selection signal) according to the function selection state is sent to the CPU 11.
Is output to In addition to the function mode changeover switch 8 on the control panel 7, various buttons and switches required for a normal video switcher are provided.
A fader, a volume and the like are arranged.

When the CPU 11 receives the function selection signal from the function mode changeover switch 8, the CPU 11 responds to the function indicated by the function selection signal (live, editing, etc.) by using the matrix switches MS1 and MS2. And ON / OFF control of the switch element on each cross point XP, and controls the video signal processing in the M / E amplifiers 14 and 19. These matrix switches M
ON / OFF control of S1 and MS2 and M / E amplifier 1
The specific contents of the control of the video signal processing in 4 and 19 will be described later.

The M / E amplifier 14 has two multipliers 30 and 33 and one adder 32. The multiplier 30 multiplies the input video signal Iα of the α bus supplied to the video signal input terminal 34 by a later-described multiplication coefficient Cα supplied to the multiplication coefficient input terminal 36, and obtains the obtained video. The signal Mα is sent to the adder 32. In the multiplier 33, the video signal input terminal 35
Is multiplied by the input video signal Iβ of the β bus supplied to the multiplication coefficient Cβ supplied to the multiplication coefficient input terminal 37, and the obtained video signal Mβ is sent to the adder 32.
Therefore, in the adder 32, the video signal Mα from the multiplier 30 and the video signal Mβ from the multiplier 33
Is generated. The synthesized video signal is sent from the video signal output terminal 38 of the M / E amplifier 14 to the effect bus as a WM effect video signal or a K / F effect video signal.

Here, the multiplication coefficient Cα supplied to the multiplication coefficient input terminal 36 is supplied from a common terminal of the changeover switch 13. The changeover switch 13 is connected to the CP according to the function selection signal of the function mode changeover switch 8.
U11 is used to control switching, the switching terminal a is connected to the K ₁ generator 12 for generating a predetermined constant K _1, is connected to the A bus / key bus the switching terminal b is through the amplifier 5 I have. Note that the constant K ₁ is a constant for processing such wipes and mix. On the other hand, the multiplication coefficient Cβ supplied to the multiplication coefficient input terminal 37 is supplied from a common terminal of the changeover switch 15. This changeover switch 1
5 also, the CPU11 according to the function selection signal of the function mode switch 8 is used to control switching, the switching terminal a generates a complement of the constant _{K 1 (1-K 1)} 1
−K ₁ generator 16 and the switched terminal b is connected to the amplifier 5
Is connected to a video complement generator 6 which generates a complement (1-S _{A / K} ) of the video signal S _{A / K} on the A bus / key bus via the A bus.

On the other hand, the M / E amplifier 19 has two multipliers 40 and 43 and one adder 42. The multiplier 40 multiplies the input video signal Iγ of the γ bus supplied to the video signal input terminal 44 by a later-described multiplication coefficient Cγ supplied to the multiplication coefficient input terminal 46, and obtains the obtained video. The signal Mγ is sent to the adder. In the multiplier 43, the input video signal Iδ of the δ bus supplied to the video signal input terminal 45,
The multiplication coefficient is multiplied by the multiplication coefficient Cδ supplied to the multiplication coefficient input terminal 47, and the obtained video signal Mδ is sent to the adder. Therefore, in the adder 42, the multiplier 4
A video signal is generated by combining the video signal Mγ from 0 and the video signal Mδ from the multiplier 43. The synthesized video signal is sent from the video signal output terminal 38 of the M / E amplifier 19 to the output terminal 22.

The multiplication coefficient Cγ supplied to the multiplication coefficient input terminal 46 is supplied from a common terminal of the change-over switch 18. The changeover switch 18 is operated by the function mode changeover switch 8 in response to the function selection signal.
U11 is used to control switching, the switching terminal a is connected to the K ₂ generator 17 for generating a predetermined constant K _2, is connected to the A bus / key bus the switching terminal b is through the amplifier 5 I have. Incidentally, the constant K ₂ is a constant for processing such wipes and mix. On the other hand, the multiplication coefficient Cδ supplied to the multiplication coefficient input terminal 47 is supplied from a common terminal of the changeover switch 21. This changeover switch 2
1 also, which the CPU11 controls switching according to the function selection signal of the function mode switch 8, the switching terminal a generates a complement of the constant _{K 2 (1-K 2)} 1
Is connected to -K ₂ generator 20, the switching terminal b is connected to the video complement generator 6 for generating a complement (1-S A / _K) of the video signal S _{A / K} on the A bus / key bus ing.

The M / E amplifiers 14 and 19 and the changeover switches 13, 15, 18 and 21 described above are connected to the CP when the video switcher is used for live use.
U11 receives the complement (1-K ₁₎ to the coefficient input terminal 37 of the constant K ₁ inputs the coefficient input terminal 36 constant K ₁ in the M / E amplifier 14, also, M / E amplifier 1
The coefficient input terminal 47 inputs the constant K ₂ to the coefficient input terminal 46 of the 9 control to enter the complement of the K ₂ (1-K _2). On the other hand, when the video switcher is used in the edit mode E1, the CPU 11
The video signal S _{A / K} on the A bus / key bus is input to the coefficient input terminal 36 of the amplifier 14 and the coefficient input terminal 37
The video signal S _{A / K's} complement to (1-S A / _K) type. In addition, M / E above K ₂ to the coefficient input terminal 47 with the coefficient input terminal 46 of the amplifier 19 to enter a constant K ₂ Complement (1
-K ₂ ). Further, when the video switcher is used in the edit mode E2, C
PU11 is a coefficient input terminal 36 of the M / E amplifier 14.
To the coefficient input terminal 37 and inputs the constants K ₁ and enter the complement of the constant K ₁ (1-K _1), also the coefficient input terminal 46 of the M / E amplifier 19 on the A bus / key bus controls to input the complement of the video signal _{S a / K (1-S} a / K) to the coefficient input terminal 47 inputs the video signal S _{a / K.}

In addition, the video switcher shown in FIG. 8 is provided with a display 9 as the display device, and the display 9 can display an image of the video signal VO output from the output terminal 22. Has become. The display 9 has a CPU 1
1, a video signal for indicating the switching status of the function mode in the function mode changeover switch 8 is also transmitted, so-called GUI (Graphical User Interface).
By e), the user can easily grasp the switching state of the function mode. Note that the GUI is an environment created so that even beginners can easily operate intuitively with a focus on images, such as expressing the state of the system using pictures such as so-called windows and icons and performing operations with a mouse. That is.

In the video switcher of FIG. 8 described above, when the function mode is switched for live use or for edit (edit mode E1, edit mode E2), the following flowcharts shown in FIGS. It works in a flow like FIG. 9 mainly shows a flow in a live mode (hereinafter, referred to as a live mode).
11 shows the flow in the edit mode E1, and FIG. 11 shows the flow in the edit mode E2.

First, in the flowchart of FIG. 9, in step ST1, reading of the state of the function mode switch 8 on the control panel 7 is started. That is, the CPU 11 determines whether the function mode state is the live mode or the edit mode E1 according to the function selection signal from the function mode switch 8 as in step ST2.
Or the edit mode E2. In step ST2, when the CPU 11 determines that the mode is the live mode, the process proceeds to step ST3 and subsequent steps. On the other hand, in step ST2, the CPU 1
If it is determined that 1 is in the edit mode E1, the process proceeds to the process after step ST20 in FIG. 10, and if it is determined that the edit mode is E2, the process proceeds to the process after step ST40 in FIG.

In the processing after step ST3, which is performed when it is determined in step ST2 that the live mode is set, the video from the A bus / key bus formed as the A bus as described with reference to FIGS. For example, the signal and the video signal from the B bus / fill bus formed by the B bus are subjected to wipe and mix processing, and further, the WE effect video signal obtained by the wipe and mix processing is combined with the program video signal from the program bus. I do.

Here, when generating a WE effect video signal from the video signal of the A bus and the video signal of the B bus, the M / E amplifier 14 performs an operation as shown in the following equation (1). Will be done. Note that #EFF _WE in the equation (1) indicates the WE effect video signal,
α _A is a video signal of the A bus supplied to the α bus,
β _B indicates a video signal of the B bus supplied to the β bus. K ₁ in the equation is the constant K ₁ , and (1-
K ₁ ) is the complement of the constant K ₁ .

#EFF _WE = Iα _A * K ₁ + Iβ _B * (1−K ₁ ) (1) where K ₁ is 0 ≦ K ₁ ≦ 1.

The WE effect video signal #EF
When combining _FWE and the program video signal, the M / E amplifier 19 performs an operation as shown in the following equation (2). Note that VO in this equation (2)
_L represents a video signal and the program video signal and the WE effects video signal #EFF _WE is synthesized, i?
_PGM indicates a program video signal supplied to the δ bus. K ₂ in the formula is the constant K ₂ , and (1−K ₂ )
Is the complement of the constant K _2.

[0088] In _{VO L = # EFF WE * K} 2 + Iδ PGM * (1-K 2) (2) above M / E amplifiers 14 and 19, the formula (1)
By performing the calculation of the formula (2) and the output terminal 22 shown in FIG.
From the above, the video signal from the A bus and the video signal from the B bus are subjected to, for example, wipe or mix processing, and further, the WE effect video signal obtained by the wipe or mix processing and the program video signal from the program bus are processed. video signal VO _L of synthesized is as that taken out.

In order to realize such use for live use, the CPU 11 of the video switcher shown in FIG. 8 uses the α bus as the A bus, the β bus as the B bus, the γ bus as the preset bus or the effect bus, In addition to performing application switching control such that the δ bus is used as a program bus or an effect bus, changeover switches 13, 15, 1
8 and 21 are controlled.

That is, in step ST3 in the flowchart of FIG. 9, the input video signal I of the α bus supplied to the video signal input terminal 34 of the M / E amplifier 14
Let α be the video signal selected on the A bus. Specifically, at this time, the CPU 11 controls the matrix switch MS1 to connect the A bus / key bus used as the A bus and a desired video bus among the video materials # 1 to # 12. At the same time, the matrix switch MS2 is controlled to connect the A bus / key bus to the α bus. As a result, the video signal of the video bus connected to the A bus / key bus is input to the video signal input terminal 34 of the M / E amplifier 14 as the input video signal Iα (that is, Iα _{A in the} formula (1)). Become so.

In the next step ST4, the M / E amplifier 1
The input video signal Iβ of the β bus supplied to the video signal input terminal 35 of No. 4 is a video signal selected by the B bus. That is, the CPU 11 at this time controls the matrix switch MS1 so that the B bus / fill bus used as the B bus and the video materials # 1 to #
12 and the matrix switch MS2 is controlled to connect the B bus / fill bus to the β bus. Thereby, the video signal of the video bus connected to the B bus / fill bus is input to the video signal input terminal 35 of the M / E amplifier 14 as the input video signal Iβ (that is, Iβ _{B in the} above formula (1)). Will be done.

In the next step ST5, the M / E amplifier 1
The input video signal Iγ of the γ bus supplied to the video signal input terminal 44 of No. 9 is selected from either the video signal selected by the preset bus or the effect video signal #EFF of the effect bus. . That is, the CPU 11 at this time controls the matrix switch MS1 to connect the preset bus used as a preset bus to a desired video bus among the video materials # 1 to # 12 and to switch the matrix switch MS1. MS2 to connect the preset bus and the γ bus, or
2 to select whether to connect the effect bus and the γ bus. As a result, either the preset video signal of the video bus connected to the preset bus or the effect video signal #EFF of the effect bus is input to the video signal input terminal 44 of the M / E amplifier 19 to input the video signal Iγ. (In the case of the above equation (2), #EFF _WE ) is input.

In the next step ST6, the M / E amplifier 1
The input video signal Iδ of the δ bus supplied to the video signal input terminal 45 of No. 9 is selected from the video signal selected by the program bus or the effect video signal #EFF of the effect bus. . That is, the CPU 11 at this time controls the matrix switch MS1 to control the program bus and the video materials # 1 to # 1.
# 12 and a desired video bus and controlling the matrix switch MS2 to connect the program bus and the δ bus, or controlling the matrix switch MS2 to connect the effect bus and the δ bus. Select whether to connect to the bus. As a result, either the video signal of the video bus connected to the program bus or the effect video signal #EFF of the effect bus is input to the video signal input terminal 45 of the M / E amplifier 19 and the input video signal Iδ ( In the case of the above equation (2), it is input as Iδ _PGM ).

In the next step ST7, the M / E amplifier 1
The multiplication coefficient Cα supplied to the multiplier coefficient input terminal 36 of 4, and the constant K ₁ from the K ₁ generator 12. That is, the CPU 11 at this time controls the changeover switch 13 to select the switched terminal a. As a result, the predetermined constant K ₁ from the K ₁ generator 12 is applied to the multiplication coefficient input terminal 36 of the M / E amplifier 14 via the changeover switch 13 by the multiplication coefficient Cα (the above equation (1)).
K ₁ ).

In the next step ST8, the M / E amplifier 1
The multiplication coefficient Cβ supplied to the multiplication coefficient input terminal 37 of _{No. 4 is} the complement (1-K ₁ ) of the constant K ₁ from the 1-K ₁ generator 16. That is, C at this time
The PU 11 controls the changeover switch 15 to select the switched terminal a. Thus, the complement of the constant K ₁ from the 1-K ₁ generator 16 (1-K ₁₎ is multiplied coefficient multiplication coefficient input terminal 37 of the M / E amplifier 14 through the changeover switch 15 C.beta ((1) in the above formula (1)
−K ₁ )).

In the next step ST9, the M / E amplifier 1
The multiplication coefficients Cγ supplied to the multiplier coefficient input terminal 46 of 9, and the constant K ₂ from the K ₂ generator 17. That is, the CPU 11 at this time controls the changeover switch 18 to select the switched terminal a side. As a result, the predetermined constant K ₂ from the K ₂ generator 17 is applied to the multiplication coefficient input terminal 46 of the M / E amplifier 19 via the changeover switch 18 by the multiplication coefficient Cγ (the equation (2)).
K ₂ ) to be input.

In the next step ST10, the multiplication coefficient Cδ supplied to the multiplication coefficient input terminal 47 of the M / E amplifier 19 is calculated by calculating the complement (1−1) of the constant K ₂ from the 1−K ₂ generator 20. K ₂ ). That is, the CPU 11 at this time controls the changeover switch 21 to select the switched terminal a. Thus, the complement (1-K ₂ ) of the constant K ₂ from the 1-K ₂ generator 20 is applied to the multiplication coefficient input terminal 47 of the M / E amplifier 19 via the changeover switch 21 by the multiplication coefficient Cδ. ((1−K ₂ ) in equation (2)).

When the process in step ST10 is completed, the process returns to step ST2.

On the other hand, in the processing after step ST20 in FIG. 10 which proceeds when it is determined in the step ST2 that the editing mode is E1, the video signal from the key bus is output as described with reference to FIGS. Performs keying with the video signal from the fill bus, further synthesizes the K / F effect video signal obtained by this keying with the program video signal from the program bus, and then adds the preset video signal to the video signal obtained by this synthesis. To join.

Here, when the video signal of the fill bus is keyed with the video signal from the key bus, the M /
The E-amplifier 14 performs a calculation as shown in the following equation (3). Note that Mα _{K / F} in the equation (3) indicates a video signal obtained by the keying, and Iα
_{FILL converts the} fill signal supplied to the α bus to Cα _KEY
Denotes a video signal (video signal S _{A / K in} FIG. 8) supplied from the key bus as a multiplication coefficient.

[0101] _{Mα K / F = Iα FILL *} Cα KEY (3) However, Mα _{K / F} is set to _{0 ≦ Mα K / F ≦ 1} , Cα KEY 1
Since the value changes within the screen, it becomes a time function.

At the same time, when the video signal from the program bus is keyed by using a multiplication coefficient composed of an inverted signal of the video signal supplied from the key bus,
The calculation shown in the following equation (4) is performed by the / E amplifier 14. Note that Mβ _{K / F} in this equation (4)
Indicates a video signal obtained by the keying, and Iβ
_{PGM converts the} program video signal supplied to the β bus into
Cβ _KEY is an inverted signal of the video signal supplied from the _key bus as a multiplication coefficient ((1-S _{A / K} ) signal in FIG. 8)
Is shown.

Mβ _{K / F} = Iβ _PGM * Cβ _KEY (4) where Mβ _{K / F} is 0 ≦ Mβ _{K / F} ≦ 1 and Cβ _KEY is 1
Since the value changes within the screen, it becomes a time function.

[0104] That is, in these formulas (3) and (4), C alpha _KEY is the S _{A / K,} because C.beta _KEY is the _{(1-S A / K)} , the key signal (S _{A / K} ) is "1"
Since Mβ _{K / F in} equation (4) becomes 0 in the portion where
The output from the / E amplifier 14 is a video signal from the fill bus, and in the portion where the key signal (S _{A / K} ) is “0”, Mα _{K / F in the} equation (3) is 0, so M The output from the / E amplifier 14 has the structure of the video signal from the program bus. In other words, the video signal of the fill bus is keyed with the video signal from the key bus,
Effect video signal #EFF _E1 obtained by keying the video signal from the program bus using a multiplication coefficient consisting of an inverted signal of the video signal supplied from the key bus
Is obtained as shown in Expression (5).

#EFF _E1 = Mα _{K / F} + Mβ _{K / F} (5)

Further, the effect video signal #EFF
_When a preset video signal from the preset bus is combined with _E1 , the M / E amplifier 19 performs an operation as shown in the following equation (6). Note that VO _E1 in the equation (6) is the effect video signal #E
A video signal obtained by synthesizing the FFF _E1 and the preset video signal is shown, where Iγ _PST represents a video signal of the preset bus. K ₂ in the equation is the constant K ₂ and (1
−K ₂ ) is the complement of the constant K ₂ .

VO _E1 = (Iγ _PST * K ₂ ) + (# EFF _E1 * (1−K ₂ )) (6) As described above, the above equation (3) is applied to the M / E amplifiers 14 and 19.
By performing the calculation of Expression (6), the video signal of the fill bus is keyed with the video signal of the key bus from the output terminal 22 of FIG. 8, and the video signal by this keying is keyed to the program video signal of the program bus. And
Further comprising a video signal from the preset bus so the video signal VO _E1 synthesized is obtained.

In order to realize such use as the edit mode E1, the CPU 1 of the video switcher shown in FIG.
In 1, the application switch is performed such that the α bus is used as the fill bus, the β bus is used as the program bus, the γ bus is used as the preset bus, and the δ bus is used as the effect bus, and the changeover switches 13, 15, 18 and 21 are controlled. Performs switching control.

That is, in step ST20 of FIG. 10 which proceeds when it is determined in the step ST2 that the editing mode is E1, the input image of the α bus supplied to the image signal input terminal 34 of the M / E amplifier 14. Signal I
Let α be the video signal selected by the fill bus. Specifically, at this time, the CPU 11 controls the matrix switch MS1 so that the B bus / fill bus used as a fill bus and the video materials # 1 to # 1 are controlled.
2, and controls the matrix switch MS2 to connect the B bus / fill bus to the α bus. Thereby, the above B
The video signal of the video bus connected to the bus / fill bus is
The video signal is input to the video signal input terminal 34 of the M / E amplifier 14 as an input video signal Iα (Iα _{FILL in the} equation (3)).

In the next step ST21, the input video signal Iβ of the β bus supplied to the video signal input terminal 35 of the M / E amplifier 14 is set as the video signal selected by the program bus. That is, the CPU 11 at this time
Controls the matrix switch MS1 to connect a program bus to a desired video bus among the video materials # 1 to # 12, and to control the matrix switch MS1.
By controlling S2, the program bus is connected to the β bus. As a result, the video signal of the video bus connected to the program bus is input to the video signal input terminal 35 of the M / E amplifier 14 so that the input video signal Iβ (Iβ
_PGM ).

In the next step ST22, the input video signal Iγ of the γ bus supplied to the video signal input terminal 44 of the M / E amplifier 19 is the video signal selected by the preset bus. That is, the CPU 11 at this time
Controls the matrix switch MS1 to connect the preset bus used as a preset bus to a desired video bus among the video materials # 1 to # 12, and controls the matrix switch MS2. ,
The preset bus is connected to the γ bus. Thereby, the video signal of the video bus connected to the preset bus is transmitted to the video signal input terminal 44 of the M / E amplifier 19.
Is input as an input video signal Iγ (Iγ _{PST of the} equation (6)).

In the next step ST23, the input video signal Iδ of the δ bus supplied to the video signal input terminal 45 of the M / E amplifier 19 is set as the video signal selected by the effect bus. That is, the CPU 11 at this time
Controls the matrix switch MS2 to connect the effect bus and the δ bus. Thereby, the video signal #E of the effect bus connected to the effect bus
The FF is connected to the video signal input terminal 45 of the M / E amplifier 19.
Is input as the input video signal Iδ (#EFF _{E1 in the} equation (6)).

In the next step ST24, the multiplication coefficient Cα supplied to the multiplication coefficient input terminal 36 of the M / E amplifier 14 is converted to the video signal S _A selected by the A bus / key bus used as a key bus. _{/ K.} That is, at this time, the CPU 11
To select the switched terminal b side. This allows
The video signal S _{A / K of the} A bus / key bus is applied to the multiplication coefficient input terminal 36 of the M / E amplifier 14 via the changeover switch 13 to obtain a multiplication coefficient Cα (Cα _{KEY of the} equation (3)).
Will be entered as

In the next step ST25, the multiplication coefficient Cβ supplied to the multiplication coefficient input terminal 37 of the M / E amplifier 14 is converted to the video signal S _A selected by the A bus / key bus used as a key bus. The complement of _{/ K} (1-
S _{A / K} ). That is, also at this time, the CPU 11
The switch 15 is controlled to select the switched terminal b. Accordingly, a video signal from the video complement generator 6 for generating a complement (1-S _{A / K)} of the video signal S _{A / K} on the A bus / key bus (1-S A / _K) is the The signal is input to the multiplication coefficient input terminal 37 of the M / E amplifier 14 via the changeover switch 15 as a multiplication coefficient Cβ (Cβ _{KEY in the} equation (4)).

[0115] In the next step ST26, the multiplication coefficients Cγ supplied to the multiplier coefficient input terminal 47 of the M / E amplifier 19, and the constant K ₂ from the K ₂ generator 17.
That is, the CPU 11 at this time controls the changeover switch 18 to select the switched terminal a side. As a result, the predetermined constant K ₂ from the K ₂ generator 17 is applied to the multiplication coefficient input terminal 46 of the M / E amplifier 19 via the changeover switch 18 by the multiplication coefficient Cγ (K _{2 in} equation (6)).
Will be entered as

In the next step ST27, the multiplication coefficient Cδ supplied to the multiplication coefficient input terminal 47 of the M / E amplifier 19 is calculated by using the complement of the constant K ₂ from the 1-K ₂ generator 20 (1−1). K ₂ ). That is, the CPU 11 at this time controls the changeover switch 21 to select the switched terminal a. Thus, the complement (1-K ₂ ) of the constant K ₂ from the 1-K ₂ generator 20 is applied to the multiplication coefficient input terminal 47 of the M / E amplifier 19 via the changeover switch 21 by the multiplication coefficient Cδ. ((1-
K ₂ )).

When the process in step ST27 ends, the process returns to step ST2.

On the other hand, in the processing after step ST40 in FIG. 11 which proceeds when it is determined in the step ST2 that the editing mode is E2, as described with reference to FIGS. The video signal from the preset bus is synthesized, and the video signal from the key bus and the video signal from the fill bus are keyed.
The K / F effect video signal obtained by the keying is keyed into a video signal in which the video signal of the program bus and the video signal of the preset bus are combined.

Here, when synthesizing the video signal from the program bus and the video signal from the preset bus, the M / E amplifier 14 performs an operation shown in the following equation (7). become. In the equation (7), #EFF _E2 indicates a video signal obtained by combining the program video signal and the preset video signal, Iα _PST indicates the video signal of the preset bus, and Iβ _PGM indicates the video signal of the preset bus. 2 shows a video signal of a program bus. K ₁ in the equation is the constant K ₁ , and (1−K ₁ ) is the complement of the constant K ₁ .

#EFF _E2 = Iα _PST * K ₁ + Iβ _PGM (1−K ₁ ) (7) Here, K ₁ is 0 ≦ K ₁ ≦ 1.

On the other hand, when the video signal from the fill bus is keyed by the video signal from the key bus,
The calculation shown in the following equation (8) is performed by the / E amplifier 19. Note that Mγ _{K / F} in this equation (8)
Denotes a video signal obtained by the keying, and Iγ
_FILL converts the fill signal supplied to the γ bus to Cγ _KEY
Indicates a video signal (S _{A / K in} FIG. 8) supplied from the key bus as a multiplication coefficient.

Mγ _{K / F} = Iγ _FILL * Cγ _KEY (8) Here, Mγ _{K / F} is 0 ≦ Mγ _{K / F} ≦ 1, and Cγ _KEY is 1
Since the value changes within the screen, it becomes a time function.

At the same time, when the composite video signal #EFF _E2 of the program video signal and the preset video signal is keyed using a multiplication coefficient composed of an inverted signal of the video signal supplied from the key bus, the M / E The operation shown in the following equation (9) is performed by the amplifier 19. In the expression (9), MδK _{/ F} indicates a video signal obtained by the keying, and CδKEY is an inverted signal of the video signal supplied from the _key bus as a multiplication coefficient ((1-S _{A in} FIG. 8). _{/ K} )).

Mδ _{K / F} = # EFF _E2 * Cδ _KEY (9) where Mδ _{K / F} is 0 ≦ Mδ _{K / F} ≦ 1, and Cδ _KEY is 1
Since the value changes within the screen, it becomes a time function.

That is, in these equations (7) to (9), Cγ _KEY is the above S _{A / K} and Cδ _KEY is the above (1)
−S _{A / K} ), and in the portion where the key signal (S _{A / K} ) becomes “1”, Mγ _{K / F in} the above equation (8) becomes 0, so M / _K
The output from the E-amplifier 19 is a video signal from the fill bus, and in the "0" portion of the key signal (S _{A / K} ), since MδK _{/ F in} equation (9) becomes 0, the M / E amplifier What is output from 19 is a configuration of a composite video signal (#EFF _E2 ) of the program video signal and the preset video signal. Therefore, the keyed video signal V is added to the composite video signal of the fill video signal and the preset video signal.
O _E2 is obtained as shown in equation (10).

VO _E2 = Mγ _{K / F} + Mδ _{K / F} (10)

As described above, the M / E amplifiers 14 and 19
By performing the calculations of the above equations (7) to (10),
From the output terminal 22 in FIG. 8, the video signal VO obtained by keying the video signal of the fill bus with the video signal of the key bus and further keying the video signal by the keying to the composite video signal obtained by combining the program video signal and the preset video signal. _E2 can be obtained.

To realize such use as the edit mode E2, the CPU 1 of the video switcher shown in FIG.
In 1, the application switching control is performed such that the α bus is a preset bus, the β bus is a program bus, the γ bus is a fill bus, and the δ bus is an effect bus, and the changeover switches 13, 15, 18 and 21 are controlled. Performs switching selection control.

That is, in step ST40 of FIG. 11 which proceeds when it is determined in the step ST2 that the editing mode is E2, the input video signal of the α bus supplied to the video signal input terminal 34 of the M / E amplifier 14. Iα
Is the video signal selected by the preset bus.
Specifically, at this time, the CPU 11 controls the matrix switch MS1 to control the preset bus used as a preset bus and the video materials # 1 to ##.
12 and a desired video bus, and controls the matrix switch MS2 to connect the preset bus to the α bus. Thereby, the video signal of the video bus connected to the preset bus is
The video signal is input to the video signal input terminal 34 of the / E amplifier 14 as the input video signal Iα (Iα _{PST in the} equation (7)).

In the next step ST41, the input video signal Iβ of the β bus supplied to the video signal input terminal 35 of the M / E amplifier 14 is set as the video signal selected by the program bus. That is, the CPU 11 at this time
Controls the matrix switch MS1 to connect a program bus to a desired video bus among the video materials # 1 to # 12, and to control the matrix switch MS1.
By controlling S2, the program bus is connected to the β bus. As a result, the video signal of the video bus connected to the program bus is input to the video signal input terminal 35 of the M / E amplifier 14 and the input video signal Iβ (Iβ of the equation (7))
_PGM ).

In the next step ST42, the input video signal Iγ of the γ bus supplied to the video signal input terminal 44 of the M / E amplifier 19 is set as the video signal selected by the fill bus. That is, the CPU 11 at this time
By controlling the matrix switch MS1, the B bus / fill bus used as a fill bus is connected to a desired video bus among the video materials # 1 to # 12, and the matrix switch MS2 is controlled. Then, the B bus / fill bus is connected to the γ bus. Thus, the video signal of the video bus connected to the B bus / fill bus is input to the video signal input terminal 44 of the M / E amplifier 19 as the input video signal Iγ (Iγ _{KEY of the} equation (8)). Become like

In the next step ST43, the input video signal Iδ of the δ bus supplied to the video signal input terminal 45 of the M / E amplifier 19 is set as the video signal selected by the effect bus. That is, the CPU 11 at this time
Controls the matrix switch MS2 to connect the effect bus and the δ bus. Thereby, the video signal #E of the effect bus connected to the effect bus
The FF is connected to the video signal input terminal 45 of the M / E amplifier 19.
As an input video signal Iδ (#EFF _E2 ).

[0133] In the next step ST44, the multiplication coefficient Cα supplied to the multiplier coefficient input terminal 36 of the M / E amplifier 14, and the constant K ₁ from the K ₁ generator 12. That is, the CPU 11 at this time controls the changeover switch 13 to select the switched terminal a. As a result, the predetermined constant K ₁ from the K ₁ generator 12 is applied to the multiplication coefficient input terminal 36 of the M / E amplifier 14 via the changeover switch 13 by the multiplication coefficient Cα (K K in the equation (7)).
₁ ) will be entered as

In the next step ST45, the multiplication coefficient Cβ supplied to the multiplication coefficient input terminal 37 of the M / E amplifier 14 is calculated by using the complement of the constant K ₁ from the 1-K ₁ generator 16 (1−1). K ₁ ). That is, the CPU 11 at this time controls the switch 15 to select the switched terminal a. Thus, the complement of the constant K ₁ from the 1-K ₁ generator 16 (1-K ₁₎ is multiplied coefficient multiplication coefficient input terminal 37 of the M / E amplifier 14 through the changeover switch 15 C.beta ((1-
K ₁ )).

In the next step ST46, the multiplication coefficient Cγ supplied to the multiplication coefficient input terminal 46 of the M / E amplifier 19 is converted to the video signal S selected by the A bus / key bus used as a key bus. _{A / K.}
That is, the CPU 11 at this time controls the switch 18 to select the switched terminal b. As a result, the video signal S _{A / K of the} A bus / key bus is applied to the multiplication coefficient input terminal 46 of the M / E amplifier 19 via the changeover switch 18 by the multiplication coefficient Cγ (Cγ of the equation (8)).
_KEY ).

In the next step ST47, the multiplication coefficient Cδ supplied to the multiplication coefficient input terminal 47 of the M / E amplifier 19 is converted to the video signal S _A selected by the A bus / key bus used as a key bus. The complement of _{/ K} (1-
S _{A / K} ). That is, also at this time, the CPU 11
The switch 21 is controlled to select the switched terminal b. Accordingly, a video signal from the video complement generator 6 for generating a complement (1-S _{A / K)} of the video signal S _{A / K} on the A bus / key bus (1-S A / _K) is the The signal is input to the multiplication coefficient input terminal 47 of the M / E amplifier 19 via the changeover switch 21 as the multiplication coefficient Cδ (Cγ _{KEY in the} equation (9)).

When the process in step ST47 is completed, the process returns to step ST2.

In the above description, the case where only a video signal is used is taken as an example. However, it goes without saying that the present invention can be applied to a case where an audio signal is simultaneously handled like a video switcher for transmission. .

From the above, in the video switcher according to the embodiment of the present invention, the function mode changeover switch 8
One can be used according to the user's intended use (for live, for editing, and for sending). If the video switcher of this embodiment is mounted on, for example, a broadcast truck, it can be diverted not only for live use but also for editing. Further, since the function of the bus can be changed even during use, it is not necessary to change the wiring of the input signal according to the purpose of use, and one signal is converted to a video signal or a key signal (or a fill signal). Can be used properly, and the editing time can be made more efficient. In the above-described embodiment, the A / bus key bus, the B bus / fill bus, the program bus, and the preset bus are used as the selection bus lines. However, the present invention is not limited to these, and even when more selection buses are used. The present invention can be applied, and the video material is not limited to the above-described # 1 to # 12, and more video materials can be used.

[0140]

As is apparent from the above description, according to the present invention, the use of the selection bus line can be switched without fixing, and the signal processing means can be switched according to the switching of the use of the selection bus line. Function can be switched, for example, when handling video signals,
Live and transmission functions can be provided, and the usability is improved by eliminating the need to change the wiring of the selection bus line.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a basic configuration of a video switcher according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a display image when the video switcher of the present embodiment is used for live use.

FIG. 3 is a circuit diagram used to explain the operation of the M / E amplifier when the video switcher of the present embodiment is used for live use.

FIG. 4 shows a video switcher according to the present embodiment in an edit mode E1.
FIG. 8 is a diagram showing an example of a display image when used for editing of the image.

FIG. 5 shows a video switcher according to the present embodiment in an edit mode E1.
FIG. 9 is a circuit diagram used for explaining the operation of the M / E amplifier when used for editing of FIG.

FIG. 6 illustrates a video switcher according to the present embodiment in an edit mode E2.
FIG. 8 is a diagram showing an example of a display image when used for editing of the image.

FIG. 7 shows a video switcher according to the present embodiment in an edit mode E2.
FIG. 9 is a circuit diagram used for explaining the operation of the M / E amplifier when used for editing of FIG.

FIG. 8 is a circuit diagram illustrating a configuration of a specific example of the video switcher according to the present embodiment.

FIG. 9 is a flowchart showing a flow of operation when the video switcher of the specific example is used for live use.

FIG. 10 shows a video switcher of a specific example in edit mode E1.
9 is a flowchart showing a flow of an operation in the case of using for editing.

FIG. 11 shows a video switcher of a specific example in edit mode E2.
9 is a flowchart showing a flow of an operation in the case of using for editing.

FIG. 12 is a circuit diagram showing a basic configuration of a conventional live video switcher.

FIG. 13 is a circuit diagram showing a basic configuration of a conventional editing video switcher.

[Explanation of symbols]

6 video complement generator, 7 control panel, 8
Function mode switch, 9 display, 1
1 CPU, 12 K1 generator, 13, 15, ₁
8,21 changeover switch, 14,19,55 M / E
Amplifier, 161-K ₁ generator, 17 K ₂ generator,
20 1-K ₂ generator, MS, MS1, MS2, ms
Matrix switch, XP cross point

Claims (5)

[Claims] 1. A plurality of signal bus lines to which input signals are respectively supplied, and each of the plurality of signal bus lines are opened / closed at respective intersections.
A plurality of selection bus lines for selecting the input signals on the plurality of signal bus lines, comprising: a switch element for closing; and a predetermined using the input signals selected by the plurality of selection bus lines A signal transmission device comprising: signal processing means for performing the above signal processing; and switching control means for performing switching control of applications of the plurality of selection bus lines and functions of the signal processing means. 2. The switching control means switches the use of one of the plurality of selection bus lines to a video signal or a key signal, and switches one of the plurality of selection bus lines to a video signal. 2. The signal transmitting device according to claim 1, wherein the application is switched for a signal or a fill signal. 3. A switching element which opens / closes at each intersection point with the plurality of selection bus lines, selects a signal on the plurality of selection bus lines, and sends a signal to the signal processing means. 2. The signal transmitting apparatus according to claim 1, wherein a plurality of signal processing bus lines to be transmitted are provided, and said switching control means also controls switching of said plurality of signal processing bus lines. 4. A switch element for opening / closing at each intersection with the plurality of signal processing bus lines,
An effect bus line for switching and selecting a signal on the plurality of signal processing bus lines and an output signal of the signal processing unit is provided. The switching control unit is configured to switch between the plurality of signal processing bus lines and the effect bus line. 4. The signal transmitting device according to claim 3, wherein the signal transmitting device also performs switching selection control. 5. The signal transmitting apparatus according to claim 1, wherein said signal processing means performs a special video effect process on the video signal based on switching control of said switching control means.