JPS63253558A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent misetting of the moving speed of a magnetic tape, by storing the tape moving speed just before the mode is switched to the temporary stopping mode and moving the tape at the stored speed irrespectively of the speed selected by a selection switch. CONSTITUTION:When a temporary stopping switch is depressed while reproduction is carried on, the tape moving speed during the reproduction is calculated by a calculating circuit 33 and stored in a storing means 34. When a storage which is depressed thereafter, a capstan 22a is once reversed and magnetic tape 21 is moved by a prescribed length in the direction opposite to the reproducing direction and the moved quantity of the magnetic tape 21 is taken-up around a tape take-up means 23. Then the magnetic tape 21 is moved at the speed stored in the storing means 34 irrespectively of the moving speed of a selection switch 28 while the phase is matched to that of a cylinder and the cycle is matched with that of control signals recorded on the magnetic tape 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording/reproducing apparatus capable of switching the transport speed of a recording medium during recording and reproduction into at least two types, particularly '/TR and EVR.

It is most suitable for use in tape recorders, etc.

BACKGROUND OF THE INVENTION A conventional recording and reproducing apparatus will be explained below with reference to the drawings.In a recording and reproducing apparatus such as a VTR that records a video signal on an 0M1 tape and reproduces the video signal using this tape, tape feeding during recording and reproduction is performed. It is conceivable that the speed can be switched in two steps.

That is, during recording, the magnetic tape feeding speed can be switched between a predetermined first speed (hereinafter abbreviated as Vs) and a predetermined second speed (hereinafter abbreviated as Ve) smaller than this Vs. Conceivable.

By the way, videotape editing work is becoming more common, and editing work involves repeating recording and playback operations.During recording, the magnetic tape contains control signals and image information to control the transport speed of the magnetic tape. and audio information are recorded. During reproduction, the transport speed of the magnetic tape is controlled by a control signal recorded on the magnetic tape, and the image information and audio information recorded on the magnetic tape are reproduced. Insert editing is an editing method frequently used in editing work.

Insert editing in a conventional recording/reproducing device will be explained below. Simply put, insert editing is a method of recording other information (for example, image information or audio information) on a portion of the magnetic tape that is being recorded.The operating procedure is to first play the magnetic tape in playback mode. Generally, when the part you want to insert is reached, you switch to pause mode, then switch to record mode to record the information you want to insert, and when the information is finished recording, switch to pause mode or stop mode. FIG. 3 is a block diagram of main parts of a conventional recording/reproducing apparatus. During playback, in Figure 3,
The magnetic tape l is held between a capstan 2a and a pinch roller 2b, which are part of the recording medium transport means, and is transported by the rotation of the capstan 2a, and is then transferred to the tape winding means 3.
It is wound up by. At this time, the magnetic tape 1 is connected to an audio control head (not shown, hereinafter abbreviated as A/C 7) which is a part of the control signal reproducing means 4.
The control signal recorded on the magnetic tape 1 is reproduced. If the pitch of this control signal is a predetermined pitch Ps, it will be at a speed of Vs, or if it is a predetermined pitch Pe, it will be at a speed of Ve. ) The capstan control circuit 5 controls the rotation of the capstan 2a to transport the magnetic tape 1 while keeping the phase with the capstan 2a.

At the same time, image information recorded on the magnetic tape l obtained from a rotating head (not shown) and audio information obtained from an A/C head (not shown) are transmitted to an output terminal 7 through a reproduction circuit 6, and recorded. Monitor T installed outside the playback device
Transmit to V. Then, the reproduced images and sounds are reproduced on the monitor TV. While watching the TV monitor, the user
When you reach the part you want to insert, press the pause switch (not shown) and switch the recording/reproducing device to pause mode. The capstan control circuit 5 stops the capstan 2a, the tape winding means 3 also stops, and the magnetic Transfer of tape 1 is also stopped. Thereafter, the user presses a recording switch (not shown) to switch the recording/reproducing device to recording mode, thereby changing the transport speed of the magnetic tape l selected by the selection switch 8 for switching between the tape transport speeds Vs and Ve. The capstan control circuit 5 controls the rotation of the capstan 2a while transporting the magnetic tape 1 and matching the phase with the cylinder, and the magnetic tape 1 is wound up by the tape winding means 3.

At the same time, the control signal generated by the control signal generating means 9 is 1,000 Ps if the transport speed of the magnetic tape 1 is v3, and is a pitch Pe if the transport speed of the magnetic tape 1 is Ve, and is a part of the control signal recording means lO. The information is recorded on the magnetic tape 1 by an A/C head (not shown). Further, the information to be inserted that is supplied to the recording/reproducing device is transmitted through the input terminal 11 and the recording circuit 12 to the rotary head (not shown) mounted on the cylinder (not shown) and the A/C.
The information is recorded on the magnetic tape 1 by a Hefd (not shown).

When the user finishes recording the information to be inserted, the user presses the pause switch again to switch the recording/reproducing device to a pause mode and stop transporting the magnetic tape 1.

With the above maneuver, the inserter 1-[collection work is completed.

Problems to be Solved by the Invention However, as described above, there are two types of magnetic tape transfer speeds: V3 and Ve. When inserting other information into a magnetic tape recorded at a transport speed of Vs, the user may not realize that the selection switch of the recording/reproducing device is set to Ve, and may perform insert editing in that state. FIG. 2 illustrates the image information 15 and control signal 16 recorded on the magnetic tape l when such insert editing is performed. As shown in FIG. 2, the pinch of the control signal 16 is recorded at a pitch Ps for the uninserted portion and at a pitch Pe for the inserted portion.

When playing magnetic tape 1 that has been insert-edited as described above, the pinch of the control signal changes rapidly at points A and B, which is caused by the inertia of the capstan motor that drives the capstan and the motor control characteristics. , the capstan rotation speed cannot follow the control signal,
Therefore, the reproduced image becomes a distorted image, resulting in a problem that an extremely difficult to view image is displayed on the monitor TV.

In view of the above-mentioned problems, the present invention stores the tape transport speed in the playback mode immediately before switching to the pause mode by switching the recording/playback device from the playback mode to the pause mode, and switches from the pause mode to the recording mode. By switching to , recording is performed at the memorized tape transport speed regardless of the tape transport speed selected by the selection switch, which covers mistakes made by the user in setting the tape transport speed during insert editing, and ensures the same To provide a recording and reproducing device which enables insert editing at a tape transport speed and obtains a clean, noise-free and synchronized reproduced image.

Means for Solving the Problems In order to solve the above problems, the recording and reproducing apparatus of the present invention includes:
A recording/reproducing apparatus comprising a selection means for selecting one speed from among a plurality of recording medium transport speeds, and a recording medium transport means for transporting the recording medium at the speed selected by the selection means during recording. a speed detecting means for detecting the transport speed of the recording medium during playback; a storage means for storing the transport speed during playback immediately before switching to the pause mode by switching to the pause mode during playback;
By switching to the pause mode during playback and then switching to the recording mode, the recording medium is transported at the transport speed stored in the storage means, regardless of the speed selected by the selection means. The apparatus is equipped with a control means for controlling the means.

According to the above-described configuration, the present invention stores the tape transport speed in the playback mode immediately before switching to the pause mode by switching the recording/playback device from the playback mode to the pause mode, and switches from the pause mode to the recording mode. By switching to , the control means controls the rotational speed of the capstan to transport the magnetic tape at the memorized tape transport speed, regardless of the tape transport speed selected by the selection switch, and image information and audio are transferred. By recording information on the magnetic tape, the tape transport speed at the time of insert is automatically set to the tape transport speed recorded in advance, which covers mistakes made by the user in setting the tape transport speed when editing the insert. , it is now possible to perform insert editing at the same tape transport speed, and it is possible to obtain clean, noise-free and synchronized playback images, while eliminating the problem of insert editing failures due to user's mistakes in setting the tape transport speed. It is something that can be resolved.

Embodiment Hereinafter, a recording/reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of main parts of a recording/reproducing apparatus in an embodiment of the present invention. In FIG. 1, during reproduction, a capstan 22a and a pinch roller 22b, which are part of the recording medium transport means, sandwich the magnetic tape 21, transport it by rotation of the capstan 22a, and wind it up with the tape winding means 23. It's Nishide. An audio control head (not shown, hereinafter referred to as A/C head), which is a part of the control signal reproducing means 24, is provided at a position in contact with the magnetic tape 21. It is designed to play back the control signal that is present. In other words, if the pitch of the control signal is a predetermined pitch Ps, at a speed of Vs, or if the pitch of the control signal is a predetermined pitch Pe, at a speed of Ve, the cylinder (not shown in the figure) A cab scan control circuit 25 controls the rotation of the capstan 22a in order to transport the magnetic tape 21 while matching the phase with a rotary head (not shown) mounted on the capstan 22a. At the same time, image information recorded on the magnetic tape 21 obtained from a rotating head (not shown) and audio information obtained from an A/C head (not shown) are transmitted to the recording/reproducing apparatus through a reproducing circuit 26 and an output terminal 27. The information is transmitted to an external monitor TV. The capstan 22a is a DD capstan motor, and near the capstan motor (not shown) there is a rotation detection means 36 for magnetically detecting the rotation speed of the capstan motor (not shown) using an MR element. and capstan 22a
A calculation circuit 33 is provided for calculating the tape transport speed from the diameter of the tape and the rotation speed obtained by the rotation detection means 36.

If the pause switch (not shown) is pressed during playback,
The calculation circuit 33 calculates the magnetic tape 2 that has been played until now.
A storage means 34 is provided to store the calculated value of the transfer speed of 1, and the storage means 34 stores the value obtained by the calculation circuit 33 at the same time as a pause switch (not shown) is pressed. At the same time, the capstan control circuit 25 stops the rotation of the capstan 22a, stops the tape winding operation of the tape winding means 23, and stops the transport of the magnetic tape 21. A selection switch 28 is also provided for switching between the tape transport speeds Vs and Ve, and the capstan control circuit 25 controls the rotational speed of the capstan 22a so that the tape transport speed during recording becomes the speed selected by the selection switch 28. It's like you want to control it.

When a pause switch (not shown) is pressed during playback, and then a record switch (not shown) is pressed, the capstan 22a is once reversed by the cab scan control circuit 25, and the magnetic tape 21 is rotated in the opposite direction to that during playback. The control circuit 35 performs control 1 so that the magnetic tape 21 is transferred by a predetermined length in the direction, and the tape winding means 23 winds up the transferred magnetic tape 21 .

Thereafter, the control circuit 35 transports the magnetic tape 21 at the speed stored in the storage means 34, regardless of the transport speed of the magnetic tape 1 selected by the selection switch 28, and the control circuit 35 transports the magnetic tape 21 at the speed stored in the storage means 34, and records data on the magnetic tape 21. The capstan control circuit 25 is controlled so as to control the rotation of the capstan 22a while synchronizing the control signal with the cylinder and the phase with the cylinder, and the tape winding means 23 controls the rotation of the capstan 22a. The tape 21 is controlled to be wound. At the same time, control signal generating means 29
generates a control signal, and the generated control signal is a pitch Ps if the speed stored in the storage means 34 is Vs, a pitch Pe if the speed is Ve, and the generated control signal is a part of the control signal recording means 30. A certain A/C head (
(not shown) on the magnetic tape 21.

Information to be inserted that is supplied to the recording/reproducing device is transmitted through the input terminal 31 and the recording circuit 32 by a rotary head (not shown) and an A/C head (not shown) mounted on a cylinder (not shown). The information is recorded on a magnetic tape 1.

The operation of the insert [collection] of the recording/reproducing apparatus having the above configuration will be explained.

During playback, when the user reaches the part where he or she wants to insert, the user presses a pause switch (not shown). When a pause switch (not shown) is pressed, the calculation circuit 33 calculates the tape transport speed at which the tape has been played so far, and the storage means 33 stores the calculated value. At the same time, the capstan 22a is stopped by the capstan control circuit 25, the tape winding operation of the tape winding means 23 is also stopped, and the transport of the magnetic tape 21 is stopped.

Thereafter, when the user presses a recording switch (not shown), the capstan control circuit 25 once reverses the capstan 22a, and the magnetic tape 21 is transported by a predetermined length in the opposite direction to that during playback. magnetic tape 21
is wound up by the tape winding means 23. after that,
The control circuit 35 causes the storage means to operate in synchronization with the control signal recorded on the magnetic tape 21 and in phase with the cylinder, regardless of the transport speed of the magnetic tape 21 selected by the selection switch 28. The magnetic tape 21 is transferred at a speed stored in the tape 34, and the transferred magnetic tape 21 is wound up by the tape winding means 23. At the same time, control signal generating means 2
The control signal generated by 9 is stored in storage means 34.
If the speed stored in is Vs, it is Bif thousand Ps, and Ve
If the speed is , it is recorded on the magnetic tape 21 by an A/C head (not shown) which is part of the control signal recording means 30 with a pinch Pe. Information to be inserted that is supplied to the recording/reproducing device is transmitted through the input terminal 31 and the recording circuit 32 to a rotary head (not shown) mounted on a cylinder (not shown) and an A/C head (not shown).
The information is recorded on the magnetic tape 21 by the following.

When the user has finished inserting the information to be inserted, the user presses the pause switch (not shown) again, thereby stopping the transfer of the magnetic tape 21 as described above and completing the insert editing.

Effects of the Invention As described above, the recording and reproducing apparatus according to the present invention includes a selection means for selecting one speed from among a plurality of recording medium transport speeds, and a recording medium that performs the recording at the speed selected by the selection means during recording. A recording/reproducing apparatus comprising a recording medium transport means for transporting a medium, a speed detecting means for detecting a transport speed of the recording medium during reproduction, and a recording/reproducing apparatus that switches to a pause mode by switching to a pause mode during reproduction. A recording means for storing the transfer speed at the time of reproduction immediately before switching, and by switching to a pause mode during reproduction and then switching to a recording mode, the transfer speed is stored in the storage means regardless of the speed selected by the selection means. controlling the recording medium transport means to transport the recording medium at a transport speed of
ff1t control means, and even if the user makes a mistake in setting the tape transport speed at the time of insertion when collecting the insert W, the tape transport speed will be memorized regardless of the tape transport speed selected by the selection switch. Image information and audio information can be recorded on the magnetic tape by controlling the number of revolutions of the capstan by a control means to transport the magnetic tape at the tape transport speed that is specified, and the tape transport speed at the time of insertion is automatically adjusted. Furthermore, since the tape transport speed is set to a pre-recorded tape transport speed, it is possible to prevent insert editing failure due to a user's mistake in setting the tape transport speed.

Further, the rotation detecting means in this embodiment is not limited to a magnetic method, but may also be an optical method without any problem. The tape transport speed can also be calculated by directly detecting the number of revolutions of the capstan and calculating it from the diameter of the capstan, or by calculating it from the diameter of the tape and the number of revolutions of the reel stand.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of a recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a recording state diagram of a control signal recorded in a conventional recording/reproducing apparatus, and FIG. 3 is a diagram of a conventional recording/reproducing apparatus. It is a main part block diagram. 21... Magnetic tape, 25... Capstan control circuit, 28... Selection switch, 33
...Calculation circuit, 34...Storage means, 3
5... Control means, 36... Rotation detection means. Name of agent: Patent attorney Toshio Nakao and 1 other famous confectioner 1 Figure

Claims (1)

[Claims] A recording/reproducing apparatus comprising a selection means for selecting one speed from among a plurality of recording medium transport speeds, and a recording medium transport means for transporting the recording medium at the speed selected by the selection means during recording. a speed detecting means for detecting the transport speed of the recording medium during playback; a storage means for storing the transport speed during playback immediately before switching to the pause mode by switching to the pause mode during playback;
By switching to the pause mode during playback and then switching to the recording mode, the recording medium is transported at the transport speed stored in the storage means, regardless of the speed selected by the selection means. 1. A recording and reproducing apparatus comprising: a control means for controlling the means.