JPH04364286A - magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To proceed reproducing and recording at the same time by outputting a signal reproduced by a reproducing head and also delaying the recording signal till a delay recording head is moved to the position of reproducing head when an outside signal is inputted. CONSTITUTION:The reproduced signal of reproducing head 5 is inputted to a special effect generating device 12 as an editor equipment reproducing signal together with a source equipment reproducing signal, and a signal converted by the device 12 is inputted to a recording signal delaying circuit 9. A recording track of the head 5 originally recorded is erased by a erase head 8 while the inputted recording signal is delayed, and then the delay recording head 6 begins to move. Since the moving time of the head 6 coming to the position of head 5 when the recording signal is inputted and the delayed amount of circuit 9 are equal, the signal subsequent to that the signal before the conversion is converted to the recording track originally being recorded, is recorded. Thus, the special effect editing by a system with one set of source equipment and one set of editor equipment can be performed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus that can easily realize editing using special effects even in a simple 1:1 editing system.

0002

2. Description of the Related Art In recent years, editing systems using magnetic recording and reproducing devices have rapidly become popular and are being used in various fields. The simplest editing system that uses a magnetic recording and reproducing device is one magnetic recording and reproducing device (hereinafter referred to as a source machine) that plays back the magnetic tape of the material, and the magnetic recording that creates the work through editing. This is a 1:1 editing system using one playback device (hereinafter referred to as an editor machine). In the 1:1 editing system, the playback signal from the source device is inserted into the editor device, added to (assembled), and recorded, so the editing is a simple cut editing. For this reason, editing using special effects is not possible. The editing system following the 1:1 editing system is AB roll editing using two source machines and an editor machine. In addition to simple cut editing, the AB roll editing system enables editing using special effects such as wipes and dissolves by processing the playback signals from two source devices using a special effect generator and sending them to the editor device. ing.

FIG. 2 is a block diagram of an AB roll editing system as an example of a conventional editing system using special effects. In FIG. 2, reference numeral 1 denotes the entire conventional magnetic recording/reproducing apparatus, which is used as an editor machine. 2 is a magnetic tape set in the magnetic recording/reproducing device 1; 3 is a recording track on the magnetic tape 2; 4 is an erasing head, and 5 is a recording/recording head that performs playback during playback and records during recording.
This is the playhead. 8 is a recording input terminal for inputting a recording signal. 11-a is one source machine A; 11-a is one source machine A;
b is the other source device B, and 12 is a special effect generating device. 13-a is a source device A playback signal outputted from the source device A and inputted to the special effect generating device 12;
3-b is a source machine B playback signal output from source machine B and input to the special effect generating device 12; 15 is a signal to which special effects are applied by the special effect generating device 12 and is sent to the recording input terminal 8 of the magnetic recording and reproducing device 1; This is the recording signal that is recorded through the .

FIG. 3(b) is a diagram showing the relationship between signal level and time in an AB roll editing system as an example of conventional editing using special effects. In FIG. 3(b), the vertical axis represents the signal level, and the horizontal axis represents time.

[0005] Regarding the AB roll editing system using the magnetic recording/reproducing apparatus having the above configuration, the operation of editing using special effects will be explained with reference to FIGS. 2 and 3(b).

As shown in FIG. 3(b), the recording/reproducing head 5 of FIG. 2 is reproducing the magnetic tape 2 up to the editing start point. At the start point of editing, the erasure head 4 starts erasing, and the recording/playback head 5 shifts from playback to recording. The special effect generating device 12 outputs a recording signal 15 processed from the reproduced signal 13-a of the source device A and the reproduced signal 13-b of the source device B, and is recorded on the magnetic tape 2 via the recording input terminal 8. Ru. In the example of FIG. 3(b), the playback signal 13-a of source device A is recorded first, special effect editing is performed in the special effect section, and the playback signal 13-a of source device B is recorded until the end point.
b is recorded. At the end point, the erase head 4 stops erasing and the record/play head 5 moves from recording to playback. From the end point, the signal becomes a reproduction signal of the editor machine 1.

[0007]

However, each system has several drawbacks when it comes to editing using special effects. First, the most basic editing system, the 1:1 editing system, cannot perform special effects editing. In particular, wipes and dissolves that require two source signals cannot be performed at all. The next step, AB roll editing, requires at least two magnetic recording and reproducing devices for the source machine, and at least three magnetic recording and reproducing devices when combined with the editor machine. Furthermore, the only part that can realize special effects is the part that switches between the two source machines, and it has the disadvantage that special effects cannot be achieved in the part that switches between the editor machine and the source machine.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a reproducing head, an erasing head of a recording track reproduced by the reproducing head, and recording at a location erased by the erasing head. a delay recording head;
By providing a recording signal delay circuit that delays the recording signal by the delay until the delay recording head moves to the position of the reproduction head when an external signal is input, the signal recorded in advance on the magnetic tape can be reproduced at the same time. It is now possible to record external input signals. Furthermore, it is additionally equipped with a special effect generating device, which enables special effect editing using playback signals from prerecorded tracks on the magnetic tape and input signals from the outside.

[0009]

[Operation] By the above means, the magnetic recording and reproducing apparatus of the present invention outputs the signal reproduced by the reproducing head, and records data until the delayed recording head moves to the position of the reproducing head when the external signal was input. By delaying the signal by the recording signal delay circuit, it is possible to simultaneously reproduce and record.

Furthermore, by providing a special effect generating device in addition, the playback output signal of the playback head is input to one side of the special effect generating device, and the input signal from the outside is input to the other input, thereby producing special effects. By obtaining the applied signal, delaying the signal as a recording signal in a recording signal delay circuit, and recording it at the original position, the playback signal of the recording track on the pre-recorded magnetic tape and the input signal from the outside can be used. The effect of editing using special effects can be obtained.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a 1:1 editing system capable of special effect editing, which is an embodiment of the magnetic recording/reproducing apparatus of the present invention. In FIG. 1, reference numeral 1 denotes the entire magnetic recording/reproducing apparatus of the present invention, which is used as an editor machine. 2 is a magnetic tape set in the magnetic recording/reproducing device 1;
3 is a recording track on the magnetic tape 2; 4 is an erasing head, 5 is a reproducing head, and 6 is a delay recording head. Reference numeral 7 denotes a reproduction output terminal for outputting a signal reproduced by the reproduction head 5, and 8 denotes a recording signal input terminal. 9
1 is a recording signal delay circuit that delays the signal input from the recording signal input terminal 8, and 10 is a delayed recording signal line that transmits the delayed recording signal output from the recording signal delay circuit 9 to the delayed recording head 6. 11 is a source machine, and 12 is a special effect generating device. Reference numeral 13 denotes a source machine reproduction signal line that sends the reproduction output signal of the source machine 11 to one of the inputs of the special effect generating device 12, and 14 denotes a reproduction signal from the reproduction output terminal 7 of the magnetic recording and reproducing device 1 to the special effect generating device. This is the editor machine playback signal line sent to the other of the 12 inputs.

FIG. 3(a) is a diagram showing the relationship between signal level and time in special effect editing by a 1:1 editing system using the magnetic recording/reproducing apparatus of the present invention. In FIG. 3(a), the vertical axis represents the signal level, and the horizontal axis represents time.

FIGS. 1 and 3(a) show a 1:1 editing system for a magnetic recording/reproducing device having the above configuration.
We will use this to explain the operation of editing using special effects.

At the starting point in FIG. 3(a), in the magnetic recording and reproducing apparatus of the present invention, the signal reproduced by the reproducing head 5 passes through the reproducing output terminal 7 as an editor reproduced signal together with the source machine reproduced signal, and is output for special effects. The signal is input to the generator 12. The signal converted by the special effect generator 12 is output to a recording signal line 15, and is input to a recording signal delay circuit 9 via a recording input terminal 8. While the input recording signal is being delayed, the storage track on which the signal reproduced by the reproducing head 5 was originally recorded is erased by the erasing head 8.
Next, the delay recording head 6 moves. Since the time it takes for the delayed recording head 6 to move to the position of the playback head 5 when the recording signal is input is equal to the delay of the recording signal delay circuit 9, the recording track where the signal before being converted is originally recorded. The signal after being converted to is recorded. The above operations operate in the same way until the end point. In the example of Fig. 3(a), the playback signal of the editor machine up to the starting point is the special effect part from the playback signal of the editor machine and the source machine from the start point, then the playback signal of the source machine, and then the playback signal of the source machine. This is the special effect part that is the opposite of that, and the end is the end point, and the part after the end becomes the playback signal of the editor machine.

[0015] Through the above operation, the source machine can record the playback signal of the source machine and the signal to which special effects have been applied using the playback signal of the signal originally recorded on the editor machine in the same place as the original. Special effects editing can be achieved using a single editor system.

[0016]

Effects of the Invention As described above, according to the present invention, editing using special effects can be performed using one source machine and one editor machine at a ratio of 1:1.
This can be easily achieved with an editing system. Also, compared to the AB roll editing system, firstly, it is advantageous in terms of cost because only one source machine is required, and secondly, it is basically the same as a 1:1 editing system, so it is easy to operate. Third, it has an excellent effect in that it is possible to edit special effects at the same time in the switching part from the editor machine to the source machine, the switching part from the source machine to the editor machine, or both parts at the same time.

It should be noted that the magnetic recording/reproducing apparatus of the present invention can be used as a VHS
If applied to a video tape recorder of this format, it also has the advantage of making it possible to easily perform after-recording of high-fidelity audio, which was not easily possible in the past.

Further, in the present invention, a magnetic tape is used as a recording medium, but a magnetic disk, an optical disk, etc. can also be used.

[Brief explanation of drawings]

[Fig. 1] Block diagram of a 1:1 editing system capable of editing using special effects according to an embodiment of the present invention

[Figure 2] AB as an example of editing using conventional special effects
Block diagram of role editing system

[Figure 3] (a) Characteristic diagram showing the relationship between signal level and time during special effect editing using a magnetic recording and reproducing device (b) Conventional A
Characteristic diagram showing the relationship between signal level and time when editing special effects using the B-roll editing system

[Explanation of symbols]

1 Magnetic recording and reproducing device body used as an editor machine 2 Magnetic tape 3 Recording track 4 Erasing head 5 Playback head 6 Delayed recording head 7 Playback output terminal 8 Recording input terminal 9 Recording signal delay circuit 10 Delayed recording signal 11 Source device 12 Special effects Generator 13 Source machine playback signal 14 Editor machine playback signal 15 Recording signal

Claims (2)

[Claims] 1. A magnetic rotary head (hereinafter referred to as a playback head) for reproducing a recorded signal of a recording track on a magnetic tape that has been recorded in advance, and a magnetic rotary head (hereinafter referred to as a playback head) for erasing the recorded signal of the recording track reproduced by the playback head. A magnetic rotary head (hereinafter referred to as an erase head) that performs recording, a magnetic rotary head (hereinafter referred to as a delayed recording head) that records on the recording track erased by the erase head, and an external signal is input. By providing a recording signal delay circuit that delays the delay recording head by the time it takes for the recording head to move to the position of the playback head when A magnetic recording/reproducing device characterized by being capable of performing the following. 2. The magnetic recording and reproducing device according to claim 1, which further includes a special effect generating device, and allows special effect editing using a reproduction signal of a recording track recorded in advance on a magnetic tape and an external input signal. A magnetic recording/reproducing device characterized by the following.