JPH07122941B2 - Interface device and control method - Google Patents

Description

The present invention relates to an interface device used for connection between a personal computer and a VTR, for example.

[Outline of Invention]

The present invention, for example, in an interface device used for connection between a personal computer and a VTR, when a high-speed playback ON command is supplied from the personal computer, until a fast-forward command is supplied to the VTR and another command is supplied. The program is continued for a predetermined time so that other programs can be executed by the personal computer even during high speed reproduction.

[Conventional technology]

If a personal computer is connected to the VTR and the operation of the VTR can be controlled by the personal computer, recording reservation, program playback, automatic editing by the personal computer, etc. become possible. When controlling the operation of the VTR by the output of the personal computer, conventionally, the program for controlling the operation of the VTR is executed by the personal computer, and the output command of this personal computer is converted into the control code of the corresponding VTR operation. It was

[Problems to be solved by the invention]

Among the VTR modes, modes such as play, fast-forward, and rewind are set by pressing the VTR play, fast-forward, rewind button once, and the state is maintained until the stop button is pressed. However, picture search (high speed playback)
It is set only while the fast-forward or rewind button is pressed during the reproduction, and returns to the reproduction state when released from the fast-forward or rewind button. Therefore, the output command of the personal computer is made to correspond to the mode control code of the VTR, and the VTR is output by the personal computer.
If the mode switching is performed, the command corresponding to the fast forward or rewind mode must be programmed to continue to be issued from the personal computer during the picture search. Therefore, the personal computer must continue to execute the program that outputs the fast-forward or rewind mode during the picture search, and during this period, other programs such as screen display and calculation cannot be executed and key input cannot be performed. There was a problem of being lost.

It is an object of the present invention to provide an interface device capable of executing another program on a personal computer while executing a mode set only while one command is continuously sent, such as during picture search. To do.

[Means for solving problems]

According to the present invention, a terminal or cable connected to the playback device 3, a terminal connected to the computer 1, and a fast-forward command to the playback device 3 side when a high-speed playback ON command is supplied from the computer 1 side. The interface device is provided with a high-speed reproduction processing unit that continues the transmission for a predetermined period until another command is supplied from the computer 1 side.

[Action]

CUE ON command or REV from personal computer 1
When the IEW ON command is output, interface 2
Generates a fast-forward or rewind control code.
This control code will continue to be generated until another command is supplied. This allows the personal computer 1 to execute other programs during the picture search.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a personal computer, 2 is an interface, and 3 is a VTR. The terminals of the personal computer 1 and the terminals of the interface 2 are bidirectionally connected via an address bus 4, a data bus 5 and a control bus 6. The terminal 7 of the interface 2 and the terminal 8 of the VTR 3 are bidirectionally connected via the connection 9.

A program for operating the VTR 3 is executed by the personal computer 1, and the output of the personal computer 1 is supplied to the interface 2. The interface 2 is composed of, for example, a one-chip microprocessor. The command output from the personal computer 1 is interpreted by the interface 2 and converted into a VTR3 control code. This control code is supplied from the interface 2 to the VTR3, and the operation of the VTR3 is controlled based on the control code.

Information indicating the operating state of the VTR 3, for example, the value of the tape counter is supplied from the VTR 3 to the interface 2. This information is interpreted by the interface 2 and converted into the code of the personal computer 1. The converted code is supplied from the interface 2 to the microcomputer 1.

In this way, the operation of the VTR 3 is controlled by the program of the personal computer 1, so that recording reservation, program reproduction, automatic editing, etc. can be executed based on the program of the personal computer 1.

Alternatively, infrared rays for controlling the VTR 3 may be generated from the interface 2 and the interface 2 and the VTR 3 may be wirelessly connected.

Modes such as play, fast forward, and rewind in the VTR3 mode are set when the control code is supplied to the VTR3, and the state of the mode is maintained until the control code of another mode is supplied. The picture search is set only while the VTR 3 is in the playback state and while the fast forward or rewind control code is supplied.

When setting the mode of the VTR 3 under the control of the personal computer 1, when setting the mode such as play, fast forward, rewind, etc., the command corresponding to these modes is generated from the personal computer 1, and this command is issued to the interface 2 Is converted into a control code and the VTR3 mode is set. CUE for picture search
An ON or REVIEW ON command is generated from the personal computer 1 as a code indicating the start of picture search. In response to these commands, the interface 2 generates a control code for fast forward or rewind, and the VTR3
To set to picture search.

For example, when a reproduction command, a CUE ON command, and an OFF command are sequentially issued from the personal computer 1 as shown in FIG. 2A, the reproduction control code from the interface 2 as shown in FIG. 2B. Is generated, a fast forward control code is generated in response to the CUE ON command from the personal computer 1, and the fast forward control code continues to be output until the personal computer 1 issues an OFF command. As a result, the mode of the VTR3, as shown in FIG. 2 C, time (t ₁ ~t ₂₎ is reproduced state, a time (t ₂ ~t ₃₎ is set to a state (high-speed reproduction of the forward rotation) Picture Search Then, the reproduction state is set again from time t ₃ .

Also, for example, as shown in FIG. 3A from the personal computer 1, a playback command, a REVIEW ON command, a CUE
When ON command and stop command are generated in sequence,
From the interface 2, as shown in FIG. 3B, after the reproduction control code is generated, the REVIEW ON command from the personal computer 1 is received, and the rewinding control code is generated.
In response to the CUE ON command, a fast forward control code is generated and a stop control code is generated. As a result,
The mode of VTR3 is, as shown in FIG. 3C, time (t _{11 to} t
₁₂ ) is set to playback mode, time (t _{12 to} t ₁₃ ) is set to picture search (reverse rotation high speed playback) state, time (t _{13 to} t ₁₄ ) is set to picture search (forward rotation high speed playback) state, and time t _{In 4}
The operation of VTR3 is stopped.

In this way, the interface 2 indicates CUE ON, which indicates the start of the picture search from the personal computer 1.
Alternatively, in response to a REVIEW ON command, a fast forward or rewind control code for the VTR 3 is generated, and this control code is continuously generated until the personal computer 1 issues an OFF command or another mode command.
As a result, it is not necessary to continue to output the fast-forward or rewind code from the personal computer 1 during the picture search, and during this period, the personal computer 1 can execute other programs or perform key input. Become.

The interface 2 receives a command from the personal computer 1 and generates a control code for the VTR 3, as shown in the flowchart of FIG.

First, it is determined whether or not the personal computer 1 requests communication with the VTR 3 (step), and if the communication is requested, communication between the interface 2 and the personal computer 1 is performed (step).

The command of the personal computer 1 plays, fast-forwards,
It is judged whether or not the command corresponds to the VTR3 control code such as rewinding or stopping (step).

If it is the corresponding command, set the CUE ON flag to 0.
(Step), the REV ON flag is set to 0 (step), the command of the personal computer 1 is converted into a VTR3 control code (step), and the converted control code is transmitted from the interface 2 to the VTR3 (step). After sending each code, return to the step.

The modes such as reproduction, fast forward, and rewind are set when the control code is supplied to the VTR 3, and the state of the mode is maintained until the control code of another mode is supplied.
Therefore, after the mode is set, the interface 2
The mode does not change even if the transmission from the to VTR3 is stopped.

If the personal computer 1 stops requesting communication when the mode is set to play, rewind, fast-forward, etc.
It is determined whether the E ON flag and the REV ON flag are set. When a mode such as playback, rewind, or fast forward is set in steps, the CUE ON flag and REV ON
Since the flag is set to 0, proceed to step VTR3
Will be stopped. At this time, the mode of VTR3 is maintained as it is.

If it is determined in the step that the command does not correspond to the control code of VTR3, the step, step, whether the command is an OFF command at the step, CUE
Whether it is an ON command or a REVIEW ON command is judged respectively.

If it is determined to be the OFF command, the CUE ON flag is set to 0 (step), the REV ON flag is set to 0 (step), the transmission to the VTR 3 is stopped (step), and the process returns to the step.

If it is judged as a CUE ON command, CUE ON
The flag is set to 1 (step), the REV ON flag is set to 0 (step), the fast-forward control code is transmitted to VTR3 (step), and the process returns to the step.

If it is judged to be a REVIE ON command, CUE
Set ON flag to 0 (step) and REV ON flag to 1
(Step), send the rewind control code to VTR3 (Step), and return to Step.

Thus, when the CUE ON command is supplied from the personal computer 1, the CUE ON flag becomes 1 and REV
When the IE ON command is supplied from the personal computer 1, the REV ON flag becomes 1.

While the interface 2 and the personal computer 1 are communicating, once the CUE ON command is supplied, the CUE ON flag becomes 1, and the CUE
The ON flag is detected and the fast-forward control code continues to be generated at the step. Also, once the REVIEW ON command is supplied, the REV ON flag becomes 1 and the R
EV ON flag is detected and rewind control code continues to be generated in step.

When OFF command is supplied, CUE ON flag and REV O
The N flag becomes 0, the process proceeds to step, and the transmission to VTR3 is stopped.

When communication between the interface 2 and the personal computer 1 is no longer performed, it is determined in steps and whether the CUE ON flag and REV ON flag are 1. When the CUE ON flag is 1, proceed to the step and continue to issue the fast-forward control code. REV ON
When the flag is 1, the process proceeds to step and the rewinding control code is continuously issued.

FIG. 5 shows another embodiment of the present invention. In this embodiment, a personal computer 1 is connected to a ROM 10 containing a program via an address bus 4, a data bus 5 and a control bus 6. The interface 2 and the ROM 10 are arranged in the same package. The program stored in the ROM 10 is a program relating to the control of the VTR 3, for example, a menu for usage, a subroutine for communication, and a program for automatic editing. As described above, since the ROM 10 has a program related to VTR3 control built therein, the user can easily create a program related to VTR3 control.

〔The invention's effect〕

According to the present invention, the control code of the VTR 3 is continuously output from the interface 2 during the picture search.
For this reason, the personal computer 1 does not have to keep issuing the command for controlling the VTR 3 during the picture search, and during this period, another program can be executed in the VTR 3.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIGS. 2 and 3 are schematic diagrams used for explaining an embodiment of the present invention, and FIG. 4 is used for explaining an embodiment of the present invention. A flow chart, FIG. 5 is a block diagram of another embodiment of the present invention. Description of main symbols in drawings 1: Personal computer, 2: Interface 3: VTR.

Claims (2)

[Claims] 1. A terminal or cable connected to a video signal reproducing device, a terminal connected to a computer, and from the time when a high-speed reproduction ON command consisting of a short-term signal is supplied from the computer side, another A means for holding a fast forward or rewind command for a predetermined period until a command is supplied and a high speed reproduction off command is supplied from the computer side, and a supply for continuously sending the fast forward or rewind command to the reproducing device side An interface device comprising means. 2. A control method for controlling a video reproducing device by a command supplied from a computer, wherein a high speed reproduction on command consisting of a short-term signal supplied from the computer side is detected, and the high speed reproduction on command is issued. Based on the detection result of, the fast forward or rewind command is continuously supplied to the video reproducing device side, and after the fast forward or rewind command is supplied for a predetermined period,
A control method adapted to stop the supply of the fast-forward or rewind command to the video signal side based on the detection result of the supply of another command from the computer.