JPH0410148B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape running position display device that displays the tape running position of a videotape using relative addresses convenient for editing work and the like.

[Background technology and its problems]

Generally, when editing a videotape, it is necessary to select the necessary video information from the video information recorded on the videotape, and to know the position on the videotape where the necessary video information is recorded. There is a need. In the conventional video tape recorder (hereinafter simply referred to as VTR), which records and plays back video signals on video tape,
A tape position display section is provided which has a recording and reproducing function of control pulse CTL and, for example, SMPTE time code in addition to video signals, and detects and displays the tape running position of the video tape using the CTL and time code. Normally, the tape position display section of a VTR often displays the tape position of a videotape using an absolute address.

By the way, in videotape editing work, operations such as running the videotape forward or backward for the required amount of time are often performed based on an arbitrary tape position, so the tape position is displayed as an absolute address. It would be extremely convenient if it could be displayed not only by the relative address from the reference tape position, but also by the relative address from the reference tape position.

[Purpose of the invention]

Therefore, the present invention has developed a new system that makes it possible to display the tape position at a relative address based on an arbitrary tape position by effectively utilizing the video tape absolute address detection and display function provided on the VTR main body side. The present invention provides a tape position display device having the following configurations.

[Summary of the invention]

In order to achieve the above object, the present invention provides a storage means for storing absolute address data supplied from a video tape recorder main body, which is equipped with a detection display means for detecting and displaying the tape running position of a videotape as an absolute address; change command means for changing the storage contents of the storage means to new absolute address data; absolute address data stored in the storage means and absolute address data indicating the current tape running position supplied from the video tape recorder main body; The gist of the present invention is to include a calculation means for calculating the difference between the two as relative address data, and a display means for displaying the relative address data calculated by the calculation means.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail.

In FIG. 1 showing the configuration of an embodiment of the tape running position display device according to the present invention, 1 is a VTR main body, and 10 is an operating device for remotely controlling the operation of the VTR main body 1. As shown in FIG.

The VTR main body 1 in this embodiment is equipped with a processor 2 that functions as a system controller for controlling the operation of a tape running system (not shown), etc. When the VTR main body 1 is used alone, the processor 2 can be accessed from an operation section (not shown). Normal operation is enabled by giving a command signal to 2. However, in this embodiment, a control signal is given to the processor 2 on the VTR main body 1 side from the processor 11 on the operating device 10 side, and the VTR main body 1
is remotely controlled by an operating device 10.

The above VTR body 1 records/records on videotape.
A counter 3 is provided to count the control pulses CTL to be reproduced.By counting the CTLs, the counter 3 detects the tape running position of the videotape, and the tape running position is determined from the output of the counter 3. Address data indicated by an absolute address is calculated by the processor 2. Here, in order to obtain the address data indicating the tape running position as an absolute address, for example, the VTR body 1
The video tape loaded on the tape may be rewound to the beginning, and a reset command may be given to the processor 2 using the reset key 5 so as to set the tape position to address 0. The absolute address data of the running position obtained by the processor 2 is displayed as an absolute value on the tape position display section 4 on the VTR main body 1 side.

As mentioned above, the VTR body 1 in this embodiment
is equipped with a tape position display section 4 that displays the tape running position of the videotape using an absolute address.

Absolute address data obtained by the processor 2 on the side of the VTR main body 1 is supplied to the processor 11 on the side of the operating device 10. This operating device 10 includes a storage section 15 consisting of three registers 12, 13, and 14 for exchanging address data with the processor 11, an operation key switch section 16 for supplying command signals to the processor 11, and a control key switch section 16 for supplying command signals to the processor 11. The tape position display section 19 numerically displays address data given from 11. Although not shown, the operation key switch section 16 is connected to a VTR.
Key switches for recording/reproducing and other normal operation commands similar to those in the operation section on the main body 1 side are provided, and in FIG. only is shown. Note that when the pre-roll key 18 is operated, the reset key 17 is also operated in conjunction with the operation.

The processor 11 of the operating device 10 in this embodiment is designed to repeatedly perform a series of control operations as shown in the flowchart of FIG.

That is, this operating device 10 controls the VTR main body 1.
When performing remote control, the processor 11:
After the start of the control operation (START), first, an operation is performed to request absolute address data D _ABS indicating the current tape position from the processor 2 on the side of the VTR main body 1, and the process moves to the first determination operation _J1 .

In this first determination operation _J1 , it is determined whether absolute address data D _ABS has been returned from the processor 2 on the VTR main body 1 side.

In the first judgment operation J ₁ above, the judgment result is
If NO, that is, the absolute address data D _ABS has not been sent, the process returns to the operation of requesting the absolute address data D _ABS . Then, in the first judgment operation _J1 , the judgment result is YES, that is, the address data
When D _ABS is being sent, the address data D _ABS1 is transferred to the first register 12 of the storage section 15. By this transfer operation, the first register 12 stores the absolute address data D _ABS indicating the current position of the video tape on the VTR main body 1 side.
is successively replaced.

After the above transfer operation, the process moves to the second judgment operation _J2 , and the reset key 17 of the operation key switch section 16 is pressed.
Determine the operating status of. In this second judgment operation _J2 , if the judgment result is YES, that is, the reset key 17 is in the ON state and a reset command is issued, the absolute address data indicating the current tape position stored in the first register 12 is read.
Transfer D _ABS1 to the second register 13. By this transfer operation, absolute address data D _ABS2 indicating the tape position when the reset command is issued by the reset key 17 is written into the second register 13.

Next to the above transfer operation or the above second judgment operation
If the determination result of _J2 is NO, that is, a reset command has not been issued, the absolute address data D _ABS1 stored in the first register 12 to the absolute address data stored in the second register 13 is
An operation is performed in which relative address data D _REL is obtained by subtracting D _ABS2 and this relative address data D _REL is written into the third register 14. Then, the relative address data D _REL stored in the third register 14 is numerically displayed on the tape position display section 19.

In this embodiment, in which the series of control operations shown in the flowchart of FIG. Absolute address data D _ABS1 indicating the position is always stored. Furthermore, absolute address data D _ABS2 indicating the tape position when the reset key 17 is operated is written in the second register 13. That is, the stored contents of the second register 13 can be changed to new absolute address data by operating the reset key 16.
D Rewritten to _ABS2 . Furthermore, the third register 1
4 always stores relative address data D _REL indicating the current tape position with reference to the tape position indicated by the absolute address data D _ABS2 stored in the second register 13. Then, the content stored in the third register 14, that is, the relative address data D _REL indicating the current position of the video tape, is numerically displayed on the tape position display section 19.

In the embodiment described above, the current position of the videotape is displayed as an absolute address on the tape position display section 4 on the side of the VTR main body 1, and the current position of the videotape is displayed on the tape position display section 19 on the operation device 10 side by pressing the reset key 16. Since the relative address from the tape position at the time of operation is displayed, it is possible to extremely easily search for any tape position on the videotape using the absolute address display and the relative address display.
Further, the tape position display section 1 on the operating device 10 side
9 operates the pre-roll key 18 of the operation key switch section 16 to activate the processor 11 on the operation device 10 side.
When a preroll command control signal is supplied to the processor 2 on the VTR main body 1 side to perform preroll control of the VTR main body 1, the preroll key 1 is
Since the reset key 16 is operated in conjunction with 7, the tape is reset to zero and automatically switches to a new relative address display state with that tape position as the editing start point.

〔Effect of the invention〕

As is clear from the description of the embodiments described above, according to the present invention, the function of detecting and displaying the tape position of a videotape on the VTR main body side using an absolute address is effectively used to detect and display an arbitrary tape position as a reference. You can display the relative address of the current tape position.
It is possible to provide a tape position display device that displays relative addresses convenient for editing work and the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of a tape position display device according to the present invention. FIG. 2 is a flowchart showing the operation of the above embodiment. DESCRIPTION OF SYMBOLS 1... VTR main body, 2... Processor on the VTR main body side, 3... CTL counter, 4... Tape position display section on the VTR main body side, 10... Operation device, 11...
...Processor on the operating device side, 12, 13, 14...
...Register, 15...Storage section, 16...Operation key switch section, 17, 18...Operation key, 19...
Tape position display section on the operating device side.

Claims (1)

[Claims] 1. A storage means for storing absolute address data supplied from the video tape recorder main body, which is equipped with a detection display means for detecting and displaying the tape running position of the videotape as an absolute address; A change command means for changing the address data calculates the difference between the absolute address data stored in the storage means and the absolute address data indicating the current tape running position supplied from the video tape recorder main body as relative address data. What is claimed is: 1. A tape running position display device comprising calculation means for calculating the relative address data calculated by the calculation means; and display means for displaying the relative address data calculated by the calculation means.