JPH02280583A - Signal processing unit - Google Patents

Abstract

PURPOSE:To attain signal processing among plural VTRs by providing a switch control circuit so as to apply on/off control to a switch group comprising matrix switch circuits provided to cross points of plural input and output lines. CONSTITUTION:Switch groups S11-S55 are constituted, each consists of one ON/OFF switch consisting of a contact pair of a moving contact (a) and a fixed contact (b) at each cross point. Row and column direction switch control circuits 16, 17 based on an operating signal of a changeover control section 20 send a switching control signal to a matrix switch circuit 1 to apply ON/OFF control to the switch groups S11-S55. The section 20 selects a desired VTR by the operation of the keyboard and outputs a signal for various edit processings among VTRs 26-30. Thus, plural external devices such as magnetic recording and reproducing devices are connected to process mutually video and audio signals via the cross points of the matrix switch circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a signal processing device that mutually processes video and audio signals from a plurality of magnetic recording and reproducing devices to perform editing such as recording and reproducing.

(Prior Art) When performing editing such as recording and playback between multiple magnetic recording and reproducing devices, such as video tape recorders (hereinafter abbreviated as VTR), signal processing as shown in FIG. 3 has conventionally been performed. equipment is being used.

This device includes a switch switching circuit 41 in which a plurality of switches 26 to 3o are arranged in parallel, and one end, which is the input side, of each switch 26 to 30 is connected to an amplifier 44, respectively.
are connected to a plurality of input terminals 46 to 50 via the amplifier 4, and the other end, which is the output side, is connected in parallel and connected to one amplifier 4.
5 to one output terminal 51. Further, the control output of the switching control section 42 is led to the switch switching circuit 41 via a decoder 43, and each switch 2
6 to 30 are configured such that arbitrary switches are controlled in an ON/10FF manner based on a switching control signal from the switching control section 42. The input terminals 46 to 50 and the output terminal 51 are connected to external devices such as VTRs 52 to VT.
The configuration is such that R55 is connected.

Next, in the signal processing device having the above configuration, an example of manually recording the reproduced video signal of the VTR 52 on the VTR 55 will be described. First, the switching control section 42 outputs a control signal to turn on the switch 26 corresponding to the VTR 52. Ru. This control signal is decoded by the decoder 43 and input to the switch changeover circuit 41, and the switch 26 is turned on.
becomes. After this, when the VTR 52 is set to playback mode, V
A reproduced video signal from the TR 52 is supplied to the VTR 55 via the input terminal 46, switch 26 and output terminal 51,
It is recorded on the VTR 55.

(Problem to be Solved by the Invention) However, this type of signal processing device is
~ The playback video signal output from the VTR 54 is
It was only possible to input it selectively to TR55. Therefore, from the VTR55 side, the VTR52 to VTR54
When supplying signals to the , it was necessary to change the connection of the input and output terminals. Also, the signal of the VTR 52 can be
There was also the problem that signal processing between a plurality of VTRs, such as when supplying signals to the TR53, was impossible.

The present invention has been made in view of the above problems, and enables selective video/audio signal processing between multiple magnetic recording/reproducing devices, thereby making it easier to perform various editing operations such as recording and playback. The purpose is to provide a signal processing device that can

(Means for Solving the Problems) In order to solve the above problems, the signal processing device of the present invention provides a signal processing device for each of a plurality of input lines wired in the row direction and a plurality of output lines wired in the column direction. a matrix switch circuit in which row-direction contacts and column-direction contacts are provided at intersections; input terminals each connected to each input line of the matrix switch circuit via an A/D converter; and each of the matrix switch circuits. By controlling on/off a switch group consisting of output terminals connected to the output lines via D/A converters, and row-direction contacts and column-direction contacts of the matrix switch circuit, the and a switch control circuit that supplies the signal led to the input terminal to the output terminal.

(Function) With the above configuration, a plurality of magnetic recording and reproducing devices can be connected to the input terminal and the output terminal.

When reproducing and recording between magnetic recording and reproducing devices, first, a desired magnetic recording and reproducing device is selected, and a switching control signal is output from the switch control circuit to the matrix switch circuit. Then, the switch corresponding to the selected magnetic recording/reproducing device is turned on. As a result, the video/audio signals introduced from one magnetic recording/reproducing device to the input terminal are converted into digital signals, then converted to analog via the cross points of the matrix switch circuit, and then sent to the other magnetic recording/reproducing device via the output terminal. It is supplied to

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing electrical connections of a signal processing device according to the present invention, and FIG. 2 is a configuration diagram showing a state in which a VTR is connected to the signal processing device.

This signal processing device supplies control signals to a matrix switch circuit 1, row direction and column direction switch control circuits 16 and 17 provided in this matrix switch circuit 1, and row and column direction switch control circuits 16 and 17. It is equipped with a switching control section 20 and the like for sending out data, and is configured to be connected to five VTRs 26 to 30 as external devices to be edited.

The matrix switch circuit 1 includes five input lines 2 wired in the row direction and five output lines 3 wired in the column direction. - has a movable contact a near the intersection with each output line 3...
are provided, while each output line 3... is provided with each input line 2.
Fixed contacts are provided near the intersections with... As a result, a pair of movable contacts a and a fixed contact at the intersection constitute a switch group S, ~SSS, which forms one ON10FF switch. and,
One end 2a of each input line 2... is connected to each input terminal 6-10 via an A/D converter 4 provided correspondingly. Also, this input terminal 6
~10 are connected to the VTR 26 via the terminal block 25 shown in FIG.
~30 output terminals 36-40, respectively. Further, one end side 3a of each output line 3... is connected to each output terminal 1t-ts via a D/A converter 5 provided correspondingly, This output terminal ti~15 and the input terminal 31 of VTR26~VTR30
.about.35 are connected to each other. Furthermore, the other end of each input line 2 is connected to the row direction switch control circuit 16, while the other end of each output line 3 is connected to the column direction switch control circuit 17.

The row direction and column direction switch control circuits 16 and 17 are as follows:
The switching control unit 8 is connected to a switching control unit 20 via an external bus 18 and an internal bus 19, and based on the operation signal of the switching control unit 20, a switching control signal is sent to the matrix switch circuit l, and each switch S++ to SSS is controlled. 0N10F
It is designed to be controlled by F.

The switching control section 20 controls the switching of a plurality of VTRs 26 to 3.
C connected to the internal bus 19.
It includes a PU 21, a memory 22 in which an operating program for the CPU 21 is stored, and a decoder 24 that decodes signals from an operation panel 23. In addition, the operation panel 23
has a keyboard, etc., and by operating this keyboard, a desired VTR can be selected, and VTRs 26 to 26 can be selected.
Outputs signals for various editing between VTRs 30.

Next, a description will be given of the operation when mutual editing of VTRs is performed using the signal processing apparatus having the above configuration.

First, as an example of signal processing between one device and multiple devices, the video playback signal of the VTR 26 is transferred to the VTR 2.
7 to VTR 30 for recording.

In this case, the operator uses the operation panel 23 to control the VTRZ6.
The operation signal output from the operation panel 23 is decoded by the decoder 24, and then the operation signal is decoded by the decoder 24.
It is led to the row direction and column direction switch control circuit 16.17 via the internal bus 19 and the external bus 18, and drives the row direction and column direction switch control circuit 16.17. As a result, the row direction and column direction switch control circuits 16°17
A switching control signal is sent from the switch S.
I! ~ Only SIS is turned on. Thereafter, when the VTR 26 is set to the playback mode and the VTRs 27 to 30 are set to the recording mode, the playback video signal output from the output terminal 36 of the VTR 26 is introduced into the input terminal 6 of the matrix switch circuit l, and the A/D converter Analog/digital conversion is performed at step 4. And switch S1! ~ After being digital/analog converted by each D/A converter 5 through each cross point of SI 5, each output terminal 12 to 15
Input terminals 32 to 35 of VTR27 to VTR30 via
supplied to As a result, the video of the VTR 26 is simultaneously recorded in the VTR 27 to TR30.

Next, as an example of performing signal processing alternately between each device, the reproduced video signal of the VTR 26 is transferred to the VTR 27 and
A case where the video reproduction signal of the VTR 29 is recorded on the VTR 30 at the same time as recording on the 2B will be explained.

In this case as well, in the same way as above, the VTR 2
6 as the output side and VTRs 27 and 28 as the input side, and selection operation as VTR 29 as the output side and VTR 30 as the input side are sequentially performed. As a result, from the row direction and column direction switch control 11 circuit 16° 17 A switching control signal is sent to switch Sl! of matrix switch circuit 1! , S.I.
3 is turned on, and the switch 34S is also turned on.

After this, put the VTR 26 into playback mode, and
27. When the VTR 2B is set to recording mode, the reproduced video signal output from the output terminal 36 of the VTR 26 is branched to the switch StZ and 313 via the input terminal 6 of the matrix switch circuit 1 and the A/D converter 4. , each D/A
From the output terminal 12.13 through the converter 5 to the VTR 27,
The signal is supplied to the VTR 28 (7) input terminals 32 and 33. Further, the reproduced video signal output from the output terminal 39 of the VTR 29 is input to the input terminal 9 of the matrix switch circuit l,
The signal is supplied to the input terminal 35 of the VTR 30 via a path including the D converter 4, the switch 34S, the D/A converter 5, and the output terminal 15. This allows the video on VTR26 to be transferred to VTR27.
In addition to being recorded on the VTR 28, the reproduced video signal from the VTR 29 can be recorded on the adjacent VTR 30.

In the above embodiment, a plurality of VTRs are used as external devices.
We have explained an example in which the reproduced video signal is processed by connecting 26 to VTR 30, but what about a tape recorder? j [It can also be applied when connecting several devices to process audio signals.

Further, in the above embodiment, the number of input lines and output lines constituting the matrix switch circuit 1 is described as five, but the number can be set to correspond to the number of external devices to be connected.

(Effects of the Invention) As explained above, according to the signal processing device of the present invention,
By connecting a plurality of external devices such as magnetic recording and reproducing devices, video and audio signals can be mutually processed through the cross points of the matrix switch circuit. Therefore, between external devices, recording or playback can be performed individually for each device, and recording and playback can also be performed simultaneously for a plurality of devices. In addition, when performing such complex editing, signal processing is performed in the opposite direction between devices, so in the past it was necessary to change the connections of the input and output terminals connected to the devices, which was cumbersome to handle. According to the present invention, it is only necessary to select and operate the desired device, and the handling is extremely simple.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a signal processing device showing an embodiment of the present invention, Fig. 2 is a block diagram of the same device with a plurality of VTRs connected to it, and Fig. 3 is a block diagram of a conventional signal processing device. It is a diagram. 1... Matrix switch circuit 4... A/D converter 5... D/A converter 6-10... Input terminals 11-15... Output terminal 16... Row direction switch control circuit 17... Column direction switch control circuit 20... Switching control section 26-30... VTR

Claims (1)

[Claims] 1) A matrix switch circuit in which a row contact and a column contact are provided at each intersection of a plurality of input lines wired in the row direction and a plurality of output lines wired in the column direction, and the matrix switch Each input line of the circuit has an A/
An input terminal connected via a D converter, an output terminal connected to each output line of the matrix switch circuit via a D/A converter, and a row direction contact and a column direction contact of the matrix switch circuit. and a switch control circuit that supplies a signal led to the input terminal to the output terminal via an intersection thereof by controlling on/off a group of switches consisting of a group of switches.