JPH053074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an editing device, and particularly to an editing device that edits video signals while controlling a plurality of video tape recorders (VTRs).

[Background technology and its problems]

As shown in FIG. 1, this type of editing device has been known in the past, in which a part of the video signal VD recorded in a first VTR 1A that operates as a player is sequentially read out to an editing machine 2, and a second VTR that operates as a recorder is used.
An editing device is used that is configured to re-record while editing on the VTR 1B. In this case, editing machine 2 is
In order to operate the second VTRs 1A and 1B in modes such as playback, recording, winding, rewinding, and inserting as necessary, the controller has an operator for command operation by the operator and is compatible with this operation. A command signal CM is sent out to communication lines 3A and 3B to be applied to VTRs 1A and 1B. At this time, the VTRs 1A and 1B return the confirmation signal RC corresponding to the given command signal CM to the editing machine 2 through the communication lines 3A and 3B, thus transmitting the command from the editing machine 2 to the VTRs 1A and 1B and confirming it. It is done like this.

When the command signal and confirmation signal have been sent and received, the first and second VTRs 1A and 1B respond to the contents of the received command signal CM and exchange the video signal VD with the editing machine 2 as necessary.

In order to control the VTRs 1A and 1B using command signals and confirmation signals as control signals, it is conceivable to configure the editing machine 2 as shown in FIG. 2. The editing machine 2 has a control signal system for two channels (hereinafter referred to as A channel and B channel) corresponding to the first and second VTRs 1A and 1B, and the control signal system for the A channel is connected to the input/output circuit 5.
The communication line 7A is connected from the A channel input/output circuit section 5A to the A channel output buffer circuit 6A.
This can be done in the first place by sending a command signal to
and the first VTR1A.
The input/output circuit section 5A receives a confirmation signal transmitted through the communication line 8A from the A channel input buffer circuit 9A.

In addition, the control signal system of the B channel is input/output circuit 5.
Among them, the communication line 7B is connected from the B channel input/output circuit section 5B through the B channel output buffer circuit 6B.
This can be done by sending a command signal to the second
and the second VTR 1B.
The input/output circuit 5B receives a confirmation signal transmitted through the communication line 8B from the B channel input buffer circuit 9B.

The input/output circuit 5 is connected to a control signal processing circuit 10 having a CPU, such as a microcomputer, via an address bus 11 and a data bus 12, and is connected to the control signal processing circuit 10, which has a CPU, such as a microcomputer, through an address bus 11 and a data bus 12. Execute data output and input processing based on the exchange. Here, command signals and confirmation signals between the editing machine 2 and the first and second VTRs 1A and 1B are differential serial data, which are transmitted bit by bit in time order.

In the editing device having such a configuration, the editing machine 2
Conventionally, when checking whether or not the editing machine 2 responds correctly when a control mode input operation is performed by the operation switch 13 (this is referred to as soundness), the first and second VTRs 1A and 1B are checked. Actually connect to communication lines 7A, 8A and 7B, 8B,
In place of the VTRs 1A and 1B, a method is adopted in which a check device (configured to receive a command signal and transmit a confirmation signal for checking purposes in the same way as the VTRs 1A and 1B) is connected.

However, according to this conventional method, in order to check the internal wiring that makes up each control signal system of the editing machine 2, two separate VTRs are prepared to be used during editing operations, or a dedicated checking device is required. In any case, there is a problem in that the control signal system of the editing machine 2 cannot be easily checked.

[Object of the present invention]

The present invention has been made in consideration of the above points,
The present invention attempts to simplify the checking operation by checking the soundness of the control signal system of the editing machine by utilizing the configuration inherent in the editing machine itself.

[Summary of the invention]

In order to achieve this purpose, the present invention includes:
The editing machine is equipped with control signal processing systems for two channels, and when determining the health of the control signal processing system of one channel, a confirmation signal is formed in the control signal processing system of the other channel and the control signal processing system of the other channel is checked. It should be given to the channel control signal processing system.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings. Parts corresponding to those in Figure 2 are given the same reference numerals as Figure 3.
As shown in the figure, the editing machine 2 includes an A-channel command signal transmission terminal 15A connected to an A-channel output buffer circuit 6A, an A-channel input buffer circuit 9A, a B-channel output buffer circuit 6B, and a B-channel input buffer circuit 9B, respectively.
It has an A channel confirmation signal reception terminal 16A, a B channel command signal transmission terminal 15B, and a B channel confirmation signal reception terminal 16B, and a first check signal is provided between the A channel command signal transmission terminal 15A and the B channel confirmation signal reception signal terminal 16B. In addition to connecting the connection line 17, a second check connection line 18 is connected between the A channel confirmation signal reception terminal 16A and the B channel command signal transmission terminal 15B.
It is made to connect.

The editing machine 2 includes a control signal processing circuit 10 and a large number of control signal processing circuit sections that respectively respond to mode command signals from an operation switch 13 arranged on an operation panel corresponding to a large number of operation modes.
The signal processing circuit section is configured, for example, as shown in FIG. 4 for a "player playback" mode command signal.

That is, the "player playback" mode signal processing circuit section 21 has A channel and B channel signal processing systems 21A and 21B, and receives playback mode commands generated by the "player playback" operation switch 22 provided on the panel of the editing machine 2. The signal S1 is sent to the playback mode signal forming section 23, and the generated "player playback" mode signal S2 is sent to the A channel input/output circuit section 5A of the input/output circuit 5 as time series data.
give to The input/output circuit 5 transmits the reproduction mode signal S2 from the A channel output buffer circuit 6A as a "player reproduction" command signal S4 from the A channel command signal transmission terminal 15A in response to the transmission command S3 given from the signal processing circuit section 21.

At this time, the first check connection line 17 supplies this "player playback" command signal S4 to the B channel input/output circuit section 5B via the B channel confirmation signal receiving terminal 15B and further via the B channel input buffer circuit 9B. In response to this, the input/output circuit 5 gives a read command S5 to the signal processing circuit unit 21, and reads the data S of the input/output circuit 5B to the read processing unit 24.
6 is read, and the status signal forming circuit 25 generates a "player playback" status signal S7 based on the contents of the data. This "player playback" status signal S7 is a "player playback" command signal S
This simulates that the first VTR 1A (FIG. 2), which is the player who received the signal No. 4, responded correctly.

This "player playback" status signal S7 is given to the B channel input/output circuit section 5B of the input/output circuit 5, and at this time, the input/output circuit 5 is set to "player playback" by the transmission command S8 given from the signal processing circuit section 21. The status signal S7 is sent out through the B channel output buffer circuit 6B and further through the B channel command signal transmission terminal 16B.

At this time, the second check connecting line 18 supplies this "player playback" status signal S7 to the A channel input/output circuit section 5A via the A channel confirmation signal receiving terminal 16A and further via the A channel input buffer circuit 9A. In response to this, the input/output circuit 5 gives a read command S9 to the signal processing circuit unit 21, and reads the data S1 of the input/output circuit unit 5A to the read processing unit 26.
0 is read, and the contents of the data S10 are given to the comparing section 27.

The comparator 27 uses this "player playback" status signal S.
7 and the “player playback” generated in the playback mode signal forming unit 23.
The data S11 forming the content of the mode signal S2 is compared, and the display drive circuit 28
is operated to light up the "player playback" lamp 29 provided on the operation panel of the editing machine 2. This means that a predetermined response action has been obtained in response to the content specified by the operation on the panel, and therefore the connection relationship of the circuit elements that make up the "player playback" signal system and the signal processing circuit section 21. This means that the signal processing function is healthy.

On the other hand, if the "player playback" lamp 29 does not light up, there is an error somewhere in the connection of the circuit elements that make up the "player playback" signal system or in the signal processing function of the signal processing circuit section 21. (not).

Therefore, it is possible to check and determine whether or not the "player playback" signal system of the editing machine 2 is sound, depending on whether the "player playback" lamp 29 is lit or not.

In the case of Figure 4, "Play" from the A channel side.
After specifying the mode, if you want to specify the "playback" mode from the B channel side, operate the "recorder playback" operation switch provided on the panel of the editing machine 2. In this case, a "recorder playback" mode signal processing circuit section having the same configuration as that in the configuration shown in FIG. In the same manner as in the case of FIG. 4, it is possible to check and determine whether the "recorder playback" signal system is healthy or not.

The other operation switches on the panel of the editing machine 2 are each provided with a signal processing circuit section as described above with reference to FIG. You can check the entire signal processing system. At this time, when checking the control signal system of the A channel in each signal processing circuit section, a confirmation signal is formed in a simulated manner using the control signal system of the B channel, and this is sent back to the control signal system of the A channel. Conversely, when checking the control signal system of the B channel, the control signal system of the A channel is used to form a simulated confirmation signal and this is sent back to the control signal system of the B channel.
In order to check whether the editing machine 2 is healthy or not, it is only necessary to prepare a very simple connecting line outside the editing machine 2 to connect the terminals.

In the above description, editing is performed by controlling two VTRs, but the present invention is not limited to this, and can be applied to editing using three or more VTRs.

〔Effect of the invention〕

As described above, according to the present invention, at least two
A two-channel control signal processing system is prepared for the editing machine in correspondence with a VTR, and when determining whether the control signal processing system of one channel is healthy or not, the control signal processing system of the other channel is used to check. By forming the signal, it is possible to check the editing machine much more easily than in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of an editing device, FIG. 2 is a block diagram showing a configuration of a conventional editing machine, FIG. 3 is a block diagram showing an embodiment of an editing device according to the present invention, and FIG. The figure is a block diagram showing the detailed configuration of a part of the control signal processing circuit. 1A, 1B...VTR, 2...Editing machine, 5...
Input/output circuit, 5A, 5B...A, B channel input/output circuit section, 6A, 6B...A, B channel output buffer circuit, 9A, 9B...A, B channel input buffer circuit, 10... Control signal processing Circuit, 13... Operation switch group, 17, 18... Connection line, 21... "Player playback" mode signal processing circuit section, 21A, 21B... A, B channel signal processing system, 22... "Player playback" Operation switch, 29..."Player playback" lamp.

Claims (1)

[Claims] 1. transmitting a command signal to at least two video tape recorders, respectively, and receiving a confirmation signal generated by each of the video tape recorders in response to the command signal; The editing machine is equipped with an editing machine configured to control each tape recorder, and the editing machine has a two-channel control signal processing circuit section that generates the command signal and receives the confirmation signal corresponding to each of the video tape recorders. and when checking the health of the control signal processing circuit section of the one channel, the control signal processing circuit section of the one channel generates the command signal and the command signal is sent to the first connection line. The control signal processing circuit section of the other channel is connected to the control signal processing circuit section of the other channel through the control signal processing circuit section of the other channel, and a simulated confirmation signal is formed in the control signal processing circuit section of the other channel, and this simulated confirmation signal is connected to the control signal processing circuit section of the other channel via the second connection line. an editing device connected to a control signal processing circuit section of a channel, and determining the soundness based on the simulated confirmation signal that arrives at the one control signal processing circuit section.