JPH05250763A - Vtr unit - Google Patents

Abstract

PURPOSE:To provide a VTR unit having a plurality of VTR sections in which response is quickened and total control is facilitated economically. CONSTITUTION:A plurality of VTR bodies 21, 31, 41 are provided, respectively, with a plurality of mechanical control microcomputers 22, 32, 42 for electrically controlling the driving system or signal system. A mode control microcomputer 50 is provided commonly for the mechanical control microcomputers in order to monitor control states thereof and to bring about a predetermined mode therefor by delivering control signals thereto. Each mechanical control microcomputer is connected through a serial bus 50 with the mode control microcomputer. Time sharing communication takes place between each mechanical control microcomputer and the mode control microcomputer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VTR device having a plurality of VTRs such as a so-called double deck VTR in one housing.

[0002]

2. Description of the Related Art Generally, a VTR, as shown in FIG. 5, for example, includes a VTR unit 1, a mechanical control microcomputer (hereinafter abbreviated as a microcomputer) 2, a mode control microcomputer 3 and a tuner. 5, a remote control unit 6, a key input unit 7, a timer 8,
The display 9 is provided.

The VTR body 1 of the VTR section 4 includes a rotary drum drive system, a tape drive system, a recording signal system and a reproduction signal system for video signals and audio signals. The mechanical control microcomputer 2 controls the motor of the drive system of the VTR main unit 1, recording / reproducing switching of video signal and audio signal system, control of servo system, reading of control signal for servo, driving of index signal, recording current, erasing current. Control.

The mode control microcomputer 3 receives operation input information from the remote control section 5 and the key input section 6, and communicates with the mechanical control microcomputer 2 to
The state of the VTR main body 1 is monitored and a control signal is output to control the mode of the VTR. The mode control microcomputer 3 also controls the tuner 4, the timer 7, and the display 8 for display.

[0005]

By the way, a recording / reproducing apparatus provided with a plurality of VTR units in one housing has been proposed (see Japanese Patent Laid-Open No. 61-80583), for example, two VTRs. The device provided with the unit is called a so-called double deck VTR. According to this double deck VTR, by switching the switching circuit in the device,
Tape duplication (tape copy) using two VTR units
Since it can be easily performed, tape editing and the like can be easily performed.

This double-deck VTR device can be constructed as shown in FIG. That is, in FIG. 6, 4A indicates the first VTR section, 4B indicates the second VTR section, and the first VTR section 4A is the VTR main unit 1A.
And a mechanical control microcomputer 2A and a mode control microcomputer 3A.
Is a VTR main body 1B and a mechanical control microcomputer 2
B and a mode control microcomputer 3B.

Reference numeral 10 denotes a centralized control microcomputer for centrally controlling these two VTR units 4A and 4B. The centralized control microcomputer 1
0 and the mode control microcomputers 3A and 3B of the VTR units 4A and 4B are connected to each other via general-purpose communication interfaces 11, 12, and 13 so that the microcomputers can communicate with each other. A tuner, a timer, a remote controller, and a key input unit are connected to the central control microcomputer 10, and the central control microcomputer 10 puts the VTR units 4A and 4B into a desired mode state.

However, in the case of such a configuration,
Data has to be exchanged between the VTR units 4A and 4B by a general-purpose communication method, the response is slow, and it is difficult to perform fine control. Also, multiple VTRs
Each part requires a microcomputer for mode control and an interface for communication.
It has the disadvantage of being uneconomical.

According to the present invention, a V equipped with a plurality of VTR units is provided.
It is an object of the present invention to provide a TR device that eliminates the above-mentioned drawbacks, has a quick response, is economical, and is easy to perform comprehensive control.

[0010]

In order to solve the above-mentioned problems, the VTR device according to the present invention has a plurality of VTR bodies 21, 31,
41, a plurality of mechanical control microcomputers 22, 32, 42 provided for each VTR main body and electrically controlling a drive system and a signal system, and monitors the control state by each mechanical control microcomputer. At the same time, supply a control signal to each mechanical control microcomputer,
A common one for revealing a predetermined mode of each VTR body
Each of the mode control microcomputer 50 is provided with a mode control microcomputer 50. The mode control microcomputer 50 receives an operation input, and the mode control microcomputer 50 and the mechanical control microcomputers 21, 31, 41 are connected by a bus 50, and each mechanical control is performed. The communication between the control microcomputer and the mode control microcomputer is performed in a time-sharing manner.

[0011]

[Operation] VT having a plurality of mode control microcomputers
The mode control microcomputer is commonly provided for the R section, and the mechanical control microcomputer of each VTR section is controlled via the bus line in a time division manner.

[0012]

FIG. 1 shows an embodiment of a VTR device according to the present invention, which is an example of a device having n VTR units. In FIG. 1, reference numeral 21 is a first VTR main body, and 22 is a mechanical control microcomputer thereof. 31 is the second V
TR main body, 32 is a microcomputer for mechanical control,
..., 41 is the n-th VTR main body, and 42 is the mechanical control microcomputer. VTR body 21, 31, ..., 4
Each 1 comprises a video circuit, an audio circuit, and a mechanical block including a motor, a head, and the like. Each of the mechanical control microcomputers 22, 32, ..., 42 monitors the state of each VTR main body and
Supply a control signal to the TR body. Each of the mechanical control microcomputers 22, 32, ..., 42 has a serial output terminal SO, a serial input terminal SI, a clock terminal CLK, and a chip select terminal CS.

Further, reference numeral 50 is a mode control microcomputer, which includes n mechanical control microcomputers 22, 32,
, 42, which is common to 42. The mode control microcomputer 50 has a serial output terminal SO, a serial input terminal SI, and a clock terminal CLK.
The mode control microcomputer 50 and each of the n mechanical control microcomputers 22, 32, ..., 42 are connected by a serial bus 51.

That is, the serial input terminal SI of the mode control microcomputer 50 is commonly connected to the serial output terminals SO of the n mechanical control microcomputers 22, 32, ..., 42, and the serial output of the mode control microcomputer 50 is output. The terminal SO is commonly connected to the serial input terminals SI of the n mechanical control microcomputers 22, 32, ..., 42. Further, the clock terminal CLK of the mode control microcomputer 50 and the clock terminals CLK of the n mechanical control microcomputers 22, 32, ..., 42 are commonly connected, and the clock for serial data transfer is the mode control microcomputer. 50 is supplied to each mechanical control microcomputer 22, 32, ..., 42.

In this example, the BS tuner microcomputer 61 is further connected to the serial bus 51. Since the BS tuner microcomputer 61 controls the BS tuner 62, it is connected to the BS tuner 62 for serial communication.

The mode control microcomputer 5
0 to chip select signals SE1, SE2, ..., SEn
Are the mechanical control microcomputers 22, 32, ..., 42
And the chip select signal SEBS is supplied to the BS tuner microcomputer 61. These chip select signals SE1, SE
2, ..., SEn and SEBS are generated in synchronism with the vertical synchronizing signal VD of the video signal and are phase-shifted from each other, as shown in FIG. As a result, serial bus communication between the mode control microcomputer 50, the mechanical control microcomputers 22, 32, ..., 42 and the BS tuner microcomputer 61 is performed in a time division manner.

The mode control microcomputer 50 is also provided.
Is directly connected to the TV tuner 63 in a serial data communicable state. Further, a display 64 for display is connected to the mode control microcomputer 50 so that the information directly obtained from a plurality of VTR units can be displayed on this display 64 only when necessary. ing.

Input selectors 23, 33, ..., 43 are provided for the respective VTR bodies 21, 31 ,. The input selectors 23, 33, ..., 43 are supplied with the output of the TV tuner 63, the output of the BS tuner 62, the line input, and a reproduction signal from another VTR main body for the duplication mode. Mode control microcomputer 50
Also controls the selection of the input selectors 23, 33, ..., 43 of the respective VTR bodies 21, 31 ,.

As described above, the VTR device according to the present invention is configured such that one common mode control microcomputer 50 is provided for the mechanical control microcomputer that controls each of the plurality of VTR bodies. Since information can be exchanged from each VTR section without using external communication, precise control can be easily performed. For example, high-precision tape editing can be performed.

In the conventional tape editing by two VTRs and one editing machine, the information of the tape position was received from the VTR and controlled in order to improve the accuracy, but the communication delay and the response of each VTR were received. The editor had to absorb the sex. Therefore, the communication for obtaining information from the VTR is fast (for example, in synchronization with the frame),
Bidirectional is desired.

In order to improve the accuracy, the playback device at the editing start point,
It is necessary for both recorders to put the tape in a paused state after returning the tape position a little, but editing machines that can control such are rare for consumer use, and generally, editing machines start at the editing start point. There is a method in which the playback is paused and the recording is paused, and the pause is released at the same time when the editing is executed. For this reason, the editing accuracy could not be increased above a certain level in this case. That is, if the playback is paused at the VTR editing start point on the player side, the time until the pause is released and a stable playback image is obtained is always delayed. Furthermore, considering the timing of the VTR on the recording machine side, etc., the accuracy will drop further.

On the other hand, according to the present invention, the mechanical control microcomputer of the VTR section on the reproducing side and the mechanical control microcomputer of the VTR section on the recording side share a common mode control microcomputer via the serial bus. Fifty
The mode control microcomputer 50 can control each VTR section, and at the same time, directly obtain information from each VTR section, so that editing performed by a high-class type editing machine can be performed. It can be carried out.

FIG. 3 is a block diagram showing the connection relationship at the time of editing. In FIG. 3, reference numeral 71 is a reproducing side VTR main body, 81 is a recording side VTR main body, and 72 is a reproducing side VTR.
Microcomputer for mechanical control, 82 is a VTR on the recording side
This is a microcomputer for mechanical control. The mode control microcomputer 50 issues a mode transition instruction to the two mechanical control microcomputers 72 and 82, and at the same time obtains information on the respective VTR bodies.

The editing operation at this time will be described with reference to the operation timing chart of FIG. 1. Playback side VTR body 71 and recording side VTR body 8
For 1, the edit start point is determined, and the edit start point is set to the pause state (see FIG. 4). Perform editing. At this time, the playback VTR body 7
In No. 1, rewinding is performed only for the longer time of releasing the pause and obtaining a stable reproduced image and the time of adjusting the timing with the recording-side VTR main body 81 (FIG. 4). of). On the other hand, the recording side VTR body 81
Rewinds the so-called joint shot and waits (FIG. 4). 3. When both the reproduction side VTR main body 71 and the recording side VTR main body 81 enter the standby state, the pause of the reproduction side VTR main body 71 is released. Then, the recording side VTR main body 81 is set at the recording start point (in FIG. 4) at which recording is started, and the reproducing side VTR is set.
The VTR main body 8 on the recording side at the point (in FIG. 4) timed so that the editing start point (in FIG. 4) of the main body 71 coincides.
Cancel the pause of 1. 4. After playing and recording up to the editing end point (in FIG. 4), both VTR bodies 71 and 81 are paused,
Prepare for the next edit. Hereinafter, by repeating the above 1 to 4, editing is performed one after another.

The above is the assemble editing called the so-called joint shooting, but preroll editing, which is a more advanced editing, is also possible according to the present invention.

Further, the mode control microcomputer 50
Also functions as a timer control microcomputer. In this case, under the control of the mode control microcomputer 50, it becomes possible to reserve and record different input sources in the plurality of VTR units. Also, multiple VTs
Simultaneous reservation and simultaneous recording can be performed in the R section. Also,
A single common mode control microcomputer controls the timers of multiple VTR units.
It is not necessary to exchange data unnecessarily as compared with the case where a tuner control microcomputer is provided and communication is performed to manage a timer. The VTR unit that is not waiting for timer reservation can be used freely.

In the example of FIG. 1, the BS tuner is connected to the mode control microcomputer 50 via the BS tuner microcomputer 61, but like the TV tuner 63, the mode control microcomputer 50 is connected.
May be directly connected to.

[0028]

As described above, according to the present invention, in a VTR device having a plurality of VTR units, one mode control microcomputer is common to the mechanical control microcomputers of the plurality of VTR units. As a result, since the mode control microcomputer and the mechanical control microcomputer are connected by a serial bus, the information of all VTR parts can be managed by one microcomputer, so that comprehensive control can be performed easily.
There is no need for unnecessary communication. Therefore, the response is quick,
Fine control is possible. For example, accurate editing can be performed.

Further, according to the present invention, only one mode control microcomputer is required for a plurality of VTR units, and the conventional general-purpose communication interface is not required. Target.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a VTR device according to the present invention.

FIG. 2 is a timing chart for explaining time division communication control between microcomputers.

FIG. 3 is a diagram showing a connection relationship during editing of the VTR device according to the present invention.

FIG. 4 is a timing chart for explaining an operation during editing.

FIG. 5 is a diagram showing a general configuration example of a VTR.

FIG. 6 is a diagram showing a possible configuration example of a VTR device including a plurality of VTR units.

[Explanation of symbols]

 21, 31, 41 VTR main unit 22, 32, 42 Mechanical control microcomputer 23, 33, 43 Input selector 50 Mode control microcomputer 51 Serial bus

Claims (1)

[Claims] 1. A plurality of VTR main bodies, a plurality of mechanical control microcomputers provided for each VTR main body and electrically controlling a drive system and a signal system, and each of the mechanical control micro-computers. The control state by the computer is monitored, and the control signal is supplied to each mechanical control microcomputer for each VT.
A common mode control microcomputer for displaying a predetermined mode of the R main body, wherein the mode control microcomputer receives an operation input, and the mode control microcomputer and the mechanical control microcomputer. A VTR device in which computers are connected to each other via a bus and communication between each mechanical control microcomputer and mode control microcomputer is performed in a time-division manner.