JPH0522664A - Matrix switcher device - Google Patents

Abstract

(57) [Summary] [Object] To provide a matrix switcher device capable of easily increasing the number of inputs and outputs by adding a matrix switcher unit. [Configuration] Arbitrary 1 of _L input terminals TI _(L)
K to connect any one of N output terminals TO _(N)
Matrix switcher units MPX ₁ , MPX ₂
To MPX _K input terminals TI _{(L) 1} , TI _{(L) 2 to} TI _{(L) K}
M switch switch blocks MXSW which are connected to each other through a common bus, and each output terminal T of each of the switch matrix blocks MXSW ₁ , MXSW _{2 to} MXSW _M.
O _{(N) 1} , TO _{(N) 2 to} TO _{(N) K} are connected in parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix switcher device for switching video signals.

[0002]

2. Description of the Related Art Generally, a matrix switcher device is used in a television studio or a broadcasting station to switch a video signal and an audio signal. Conventionally, an M × N matrix switcher device that switches and selects and outputs N video signals from M input video signals is configured as shown in FIG. 4, for example.

The matrix switcher device shown in FIG. 4 has M = N = 4 and four video signals I _{1 to} I.
₄ is a video distribution amplifier (DSA: Distributor Amp.) DSA _{1 to} DSA via input terminals TI _{1 to} TI ₄ , respectively.
Supplied to ₄ . These video distribution amplifiers DSA _1- D
SA ₄ is an amplifier that 2 distributes the video signal, the video signal I _1, I ₂ from the video distribution amplifier DSA _1, DSA ₂ is supplied to the matrix switcher unit MPX ₁ and the matrix switcher unit MPX _2. Video signal I ₃ from the video distribution amplifier DSA _3, DSA _4, I ₄
Are supplied to the matrix switcher unit MPX ₃ and the matrix switcher unit MPX ₄ .

The matrix switcher unit MP
Each of X _{1 to} MPX ₄ is, for example, a 2 × 2 matrix switcher unit. The matrix switcher unit MPX ₁ is a video distribution amplifier DSA ₁ , DSA ₂
Changeover switch S by switching the video signals I ₁ and I ₂ from
Supply to W ₁ and SW ₂ . The matrix switcher unit MPX ₂ switches the video signals I ₁ and I ₂ from the video distribution amplifiers DSA ₁ and DSA ₂ to change the switch S.
Supply to W ₃ and SW ₄ . The matrix switcher unit MPX ₃ switches the video signals I ₃ and I ₄ from the video distribution amplifiers DSA ₃ and DSA ₄ to change the switch S.
Supply to W ₁ and SW ₂ . The matrix switcher unit MPX ₄ switches the video signals I ₃ and I ₄ from the video distribution amplifiers DSA ₃ and DSA ₄ to change the switch S.
Supply to W ₃ and SW ₄ .

The changeover switch SW ₁ selects one of the video signals I _{1 to} I ₄ from the matrix switcher units MPX ₁ and MPX ₃ and outputs it to the output terminal TO ₁ as a video signal O ₁ . The changeover switch SW ₂ selects one of the video signals I _{1 to} I ₄ from the matrix switcher units MPX ₁ and MPX ₃ and outputs it as the video signal O ₂ to the output terminal TO ₂ . The changeover switch SW ₃ is the matrix switcher unit MPX ₂ , MPX ₄ described above.
One of the video signals I _{1 to} I ₄ is selected and output as the video signal O ₃ to the output terminal TO ₃ . The changeover switch SW ₄ is the matrix switcher unit MPX ₂ , MPX.
One of the video signals from ₄ is selected and output to the output terminal TO ₄ as a video signal O ₄ .

[0006] As described above, the output terminal TO ₁ ~TO ₄ to the input terminal TI ₁ ~TI ₄ four video signals I ₁ ~I ₄ arbitrarily selected video signal output from the supplied via each To be done. In addition, these output terminals TO _{1 to} TO
Video distribution amplifier DSA having the same delay characteristics Each video signals O ₁ ~ O ₄ is taken out from the _4, the matrix switcher unit M respectively have the same delay characteristics
PX and changeover switch S each having the same delay characteristic
Since the signal passes through W, the delay time of each of the video signals O _{1 to} O ₄ is the same regardless of which path is passed, and the output video signal O
The phases of _{1 to} O ₄ are made to be the same.

[0007]

By the way, in the conventional matrix switcher device having the structure shown in FIG. 4, the image distribution amplifier DSA, the 2 × 2 matrix switcher unit MPX and the changeover switch SW are increased to input / output. When increasing the number of video signals, the video distribution amplifier DSA and the matrix switcher unit MPX
And the wiring of the matrix switcher unit MPX and the changeover switch SW are complicated and cannot be easily performed. Further, in general, a matrix switcher device for switching an RF modulated video signal has a number M of inputs.
If the number of outputs and the number of outputs N are fixed, for example, M = N = 32, and the number of demands at the installation site is below those levels, there is no problem, but as a device for future expansion or large-scale demand There was a problem that it was not able to respond flexibly to the demands of

In view of the above situation, the present invention is capable of selectively outputting a plurality of input digital video signals to desired output terminals, and uses the same matrix switcher unit to reduce the size from large to large. Matrix switcher devices up to the scale can be configured, and matrix switcher units can be easily added,
An object of the present invention is to provide a matrix switcher device capable of easily increasing the number of input / output video signals.

[0009]

In order to achieve the above-mentioned object, a matrix switcher device according to the present invention replaces any one of L input terminals with any one of N output terminals. The present invention is characterized in that M matrix switcher blocks are formed by connecting the respective input ends of the K matrix switcher units to be connected by a common bus, and the respective output ends of the matrix switcher blocks are connected in parallel.

[0010]

In the matrix switcher device according to the present invention, the matrix switcher unit selectively connects any one of the L input terminals to any one of the N output terminals to provide K matrix switcher units. Of the matrix switcher block in which the respective input terminals are connected by a common bus, the arbitrary one of the L input terminals is selectively connected to the arbitrary one of the K × N output terminals. In a matrix switcher device in which the output terminals of M matrix switcher blocks are connected in parallel, an arbitrary one of the M × L input terminals is selected as an arbitrary one of the K × N output terminals. Connect to each other.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the matrix switcher device according to the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the matrix switcher device according to the present invention has L input terminals TI.
_(L) and K × N output terminals TO _{(N) 1,} TO _{(N) 2 to} TO
M matrix switcher blocks MXSW having _{(N) K} are provided, and each matrix switcher block MXSW is provided.
_1, MXSW _2, formed by parallel connection of ~MXSW each K × N number of output terminals TO _(N) 1 of _{M, TO (N) 2 ~TO} (N) K.

Matrix switcher block MXS
As shown in FIG. 2, W has L input terminals TI.
_(L) and K matrix switcher units MPX having _N output terminals TO _(N) are provided, and each of the matrix switcher units MPX _1, MPX _{2 to} MPX _K has L input terminals TI _{(L) 1} , TI. _{(L) 2 to} TI _{(L) K} are connected to _L input terminals TI _(L) via a common bus.

As shown in FIG. 3, the matrix switcher unit MPX is composed of L × N matrix switchers, and any one of the _L input terminals TI _(L) is connected to the N output terminals. It is possible to selectively connect to TO _(N) . Further, in this matrix switcher unit MPX, the non-selected output terminals which are not connected are electrically inactivated.

K matrix switcher units MPX are provided, and each matrix switcher unit M is provided.
PX _1, MPX _{2 to} MPX _K L input terminals TI _{(L) 1} and TI _{(L) 2 to} TI _{(L) K} are connected to _L input terminals TI _(L) via a common bus. The matrix switcher block MXSW functions as an L × K · N matrix switcher, and any one of the _L input terminals I _(L) is K.
It can be selectively connected to one of the × N output terminals TO _{(N) 1,} TO _{(N) 2 to} TO _{(N) K.} Further, this matrix switcher block MXSW is simple in that the number of outputs is increased in units of N by adding the L × N matrix switcher unit MPX and connecting the _L input terminals TI _(L) to a common bus. Can be increased to

Then, M matrix switcher blocks MXSW are provided, and each of the matrix switcher blocks MXSW _1, MXSW _{2 to} MXSW _M is K ×.
A matrix switcher device in which _N output terminals TO _{(N) 1,} TO _{(N) 2 to} TO _{(N) K} are connected in parallel is M · L × K
-Functioning as an N matrix switcher, any one of M x L input terminals TI _{(L) 1,} TI _{(L) 2 to} TI _{(L) M} is K x N output terminals TO _(N) It can be selectively connected to one of _1, TO _{(N) 2 to} TO _{(N) K.} In addition, this matrix switcher device further includes a matrix switcher block MXSW functioning as the above L × K · N matrix switcher, and K × N output terminals TO.
_{By connecting (N) 1,} TO _{(N) 2 to} TO _{(N) K} in parallel with K × N output terminals of another matrix switcher block, the number of inputs can be easily increased in units of L. .. Further, as described above, each matrix switcher block M
By adding an L × N matrix switcher unit MPX to XSW _1, MXSW _{2 to} MXSW _M and connecting the _L input terminals TI _(L) to a common bus, the number of outputs can be easily increased in units of N. You can increase.

[0017]

As described above, the matrix switcher device according to the present invention functions as an M.L.times.K.N matrix switcher, and any one of M.times.L input terminals is K.times.N. Can be selectively connected to one of the output terminals. Further, in this matrix switcher device, the number of outputs can be easily increased in units of N by adding a matrix switcher unit to the matrix switcher block and connecting its L input terminals to the common bus. Further, this matrix switcher device can easily increase the number of inputs in units of L by adding a matrix switcher block and connecting its output terminal in parallel with the output terminal of another matrix switcher block.

Therefore, according to the present invention, a plurality of input digital video signals can be selectively output to a desired output terminal, and the same matrix switcher unit can be used for a matrix switcher from a small scale to a large scale. It is possible to provide a matrix switcher device that can configure the device, can easily add a matrix switcher unit, and can easily increase the number of input / output video signals.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a matrix switcher device according to the present invention.

FIG. 2 is a configuration diagram of a matrix switcher block used in the matrix switcher device shown in FIG.

3 is a configuration diagram of a matrix switcher unit used in the matrix switcher device shown in FIG.

FIG. 4 is a configuration diagram of a conventional matrix switcher device.

[Explanation of symbols]

MPX, MPX _{1 to} MPX _K ... Matrix switcher unit MXSW, MXSW _{1 to} MXSW _M ... Matrix switcher block TI _(L), TI _{(L) 1 to} TI _{(L) M} ... Input Terminals TO _(N), TO _{(N) 1 to} TO _{(N) K} ... Output terminals

Claims (1)

Claim: What is claimed is: 1. A common bus for connecting each input terminal of K matrix switcher units, each connecting any one of the L input terminals to any one of the N output terminals. A matrix switcher device comprising M matrix switcher blocks to be connected, and each output terminal of each matrix switcher block being connected in parallel.