JPH056595A - Video tape recorder - Google Patents

Abstract

(57) [Summary] [Purpose] Schedule recording of tapes without waste without erasing the programs you want to keep on the recorded tapes. [Structure] An address code recording / reproducing head 1 records in advance an address code by a control signal recording / reproducing head 4 before and after a recorded program on a magnetic tape 13. At the time of reserved recording, the VTR is driven by the timer 11 to drive the tape to the position of the address code at which recording is started. During recording by reservation When the control signal reproducing head 12 searches for an address code indicating the end of recording,
The control unit 8 stops the driving unit 9 to stop recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a video tape recorder (hereinafter referred to as VTR) having a reserved recording function.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing an example of a VTR in which an address code is recorded on a control track of a conventional magnetic tape, and retrieval and reservation recording are performed. FIG. 6 shows a control used for this. It is a figure showing arrangement of a signal recording / reproducing head and other heads.

In FIG. 5, a microcomputer 10 controlled by a timer 11 is connected to a control unit 8, and the control unit 8 controls a drive unit 9. The address code recording operation unit 1 is connected to the terminal R of the switch 3 via the duty ratio changing unit 2. The other terminal S of the switch 3 is connected to the control unit 8 via the duty ratio determination unit 6 and the search unit 7. The switch 3 is operated by the search operation unit 5 connected to the control unit 8, and the search operation unit 5 is also connected to the search unit 7. The control signal recording / reproducing head 4 is connected to the terminal R or S by switching the switch 3, and can record the retrieval signal on the control track of the magnetic tape 13 or reproduce the retrieval signal.

FIG. 6 shows the arrangement of magnetic heads.
The magnetic tape 13 passes through the full-width erasing head 14 and then is wound around the rotary drum 15, and then passes through the control signal recording / reproducing head 4. Although not shown, the rotary drum 15 is provided with a magnetic head for recording and reproducing images.

In FIG. 5, conventionally, when an address code is input in the address code recording operation section 1, the magnetic tape 1
On the control track No. 3, the digital search signal changed by the duty ratio changing unit 2 is recorded by the control signal recording / reproducing head 4. At this time, the switch 3 is connected to the terminal R side. When a search is performed, the switch 3 is switched to the terminal S side by the search operation unit 5, and fast forward or rewind is performed by the control unit 8 and the drive unit 9, and the control signal recording / reproducing head 4 moves the control track of the magnetic tape 13 on the control track. And the duty ratio discriminating unit 6 and the searching unit 7 perform the search. It was used only for searching recorded tape programs.

[0006]

FIG. 3 shows an example of the format of a recorded program on one tape. For example 6
Those capable of time recording will be described. In the figure,
Conventionally, programs 1 to 4 were recorded on tape for a total of 4 hours,
In the case of reserved recording, when it is desired to leave programs 2 and 4 and newly record them in order of 1-hour program, 1-hour program, and 30-minute program, the timer 11 is reserved as such and program 4 is recorded.
When the recording start time comes, the recording is started by the operation of the timer 11 and the microcomputer 10, and two 1-hour programs are recorded in the unrecorded part after the program 4. The 30 minute program was not recorded and in this example the user had to manually rewind to either Program 1 or Program 3.

Therefore, it has been difficult to perform reserved recording of the tape without waste without erasing the program to be left on the recorded tape. In addition, when performing reserved recording, it is necessary to set the recording start position in advance in advance, which is troublesome in a hurry.

[0008]

In the present invention, a control signal reproducing head for reading an address code recorded on a control track of a magnetic tape is provided in front of a full width erasing head, and a control signal reproducing head for reading a recorded program before and after a full width erasing head is provided. A control signal recording / reproducing head for recording and reproducing the address code on the control track is provided, and further, a timer and a means for retrieving the control signal are provided to control the drive section.

[0009]

Since the present invention has the above-described structure, the address code is recorded in advance at the beginning and the end of the recorded tape program, and when the address is designated during the reserved recording, the control is performed during the recording. In order for the signal reproducing head to read the address code and operate as instructed in the reservation,
Control of stop, fast forward, rewind, and search can be performed by the microcomputer.

[0010]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a diagram showing the arrangement of the control signal reproducing head and other heads. FIG. 3 is an example of the format of a recorded program on one tape. FIG. 4 is an example of a reserved recording designation display.

1 is different from the conventional example shown in FIG. 5 in that a control signal reproducing head 12 is added, and accordingly, the microcomputer 10 is connected to the search section 7 and the search operation section 5. ..

FIG. 2 differs from the conventional arrangement of FIG. 6 in that the control signal reproducing head 12 is provided before the full width erasing head 14. The arrow indicates the traveling direction of the magnetic tape. The control signal reproducing head 12 is provided before the full width erasing head 14 because the address code must be read before the address code is erased by the full width erasing head 14 during recording.

In FIG. 1, an address code recording / reproducing head 1 records an address code in advance before and after each program on a recorded tape 13 by a control signal recording / reproducing head 4. At this time, the search operation unit 5 is operated to move the switch 3 to the terminal R side.

For example, in the case of reservation recording on a recorded tape as shown in FIG. 3, the address code 0 is added before and after each program.
1, 02, 03, 04, 05 etc. are recorded. Program 2
When it is desired to record 1 hour program, 1 hour program, and 30 minute program in order, leaving 4 and 4, the timer 11 makes a reservation as shown in FIG. Since two one-hour programs are recorded in the unrecorded two-hour portion, first, assuming that the first reservation is the first one-hour program in FIG. 4, its start address is 0.
5, the search operation unit 5 is operated by the microcomputer 10 and the switch 3 is set to the terminal S at a predetermined time before the recording start time.
Then, the drive unit 9 is operated and the magnetic tape 13 is run. An address code 05 picked up by the control signal recording / reproducing head 4 is searched by the duty ratio discriminating unit 6, the searching unit 7, and the control unit 8. After searching,
There, the drive unit 9 stops the tape running after the program 4, waits until the recording start time, and starts recording at the start time by the timer 11. Then, the recording is finished in one hour. Next, the program is recorded for one hour by the second reservation, but since the address code is not specified here, the timer 11 starts recording at the start time and ends the recording in one hour. Next, in the third reservation, since the start address is 01, the search operation unit 5 is operated by the microcomputer 10 a certain time before the recording start time, the switch 3 is set to the terminal S side, and the drive unit 9 is operated. The magnetic tape 13 is run. The duty ratio discrimination unit 6, the search unit 7, and the control unit 8 search for the address code 01 picked up by the control signal recording / reproducing head 4, and when the search is completed, that is, before the program 1, the drive unit 9 drives the magnetic tape 13 Stop running. After that, it waits until the recording start time. The timer 11 causes the control unit 8 and the drive unit 9 to start recording at the start time. Here, the control signal reproducing head 12 reads the address code in front of the full width erasing head 14. If the address code 02 is searched by the search unit 7 and the microcomputer 10 and the address code 02 is searched before the recording end time, the control unit 8 and the drive unit 9 stop the recording at that position. If the address code 02
If is not searched, it will be recorded until the scheduled recording end time.

[0015]

As described above, according to the present invention, by adding the control signal reproducing head in front of the full-width erasing head, only the program desired to be left on the recorded tape, which is difficult with the conventional VTR, is left. , The tape can be reserved for recording without waste, and there is no need to manually set the recording start position.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing an arrangement of a control signal reproducing head and other heads.

FIG. 3 is a diagram showing an example of a format of a recorded program on one tape.

FIG. 4 is a diagram showing an example of a reserved recording designation display.

FIG. 5 is a block diagram of a conventional example.

FIG. 6 is a diagram showing the arrangement of a conventional control head and another head.

[Explanation of symbols]

 1 Address Code Recording Operation Section 2 Duty Ratio Change Section 3 Switch 4 Control Signal Recording / Reproducing Head 5 Search Operation Section 6 Duty Ratio Judgment Section 7 Search Section 8 Control Section 9 Driving Section 10 Microcomputer 11 Timer 12 Control Signal Playback Head 13 Magnetic Tape 14 Full width erasing head 15 rotating drum

Claims (1)

Claim: What is claimed is: 1. A control signal reproducing head for reading an address code recorded on a control track of a magnetic tape provided in front of a full width erasing head, and a magnetic tape provided after the full width erasing head. A control signal recording / reproducing head for recording and reproducing address codes on the control tracks before and after the recorded program,
A timer and means for retrieving said control signal,
A video tape recorder, comprising: a timer and means for controlling the drive unit by the retrieved signal.