JPH0444654A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable the high speed search by making a head output double the frequency of standard speed reproducing. CONSTITUTION:A signal conversion circuit 31a and a signal processing circuit 32a are capable of processing a signal in the frequency of the standard speed and in its double frequency. Consequently, when a data on a tape is read under FF/REW, the head output is set as double the frequency of the standard speed reproducing, so that even when the cylinder speed is high speed, read skips of a data can be diminished. In addition, an effect of tape speed fluctuation during high speed traveling upon relative speed can be reduced by half as compared with the conventional case. Then, in the case of a problem of noise generated by the cylinder at the time of FF traveling because of the cylinder speed turning out to be too high speed, the cylinder speed is turned down in order to make the head output the frequency of the standard speed reproducing, so that the noise generated by the cylinder is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a digital audio tape recorder (hereinafter referred to as
It is called DAT. ) and video tape recorders (hereinafter referred to as VT)
Call it R. ), etc., relates to a recording and reproducing apparatus that forms diagonal tracks on a tape and performs recording and reproducing.

BACKGROUND OF THE INVENTION In recent years, devices have been proposed that improve operability by recording subcode information such as addresses and track numbers on diagonally formed tracks, such as DAT, and reading the subcode information when driving at high speeds. Therefore, higher tape speeds are required.

Furthermore, in order to make editing and dubbing work more efficient, there is a need for something that can play back at higher speeds.

As a conventional recording/reproducing device, for example,
This is shown in Japanese Patent No. 934.

A conventional recording/reproducing device will be explained below.

FIG. 7 shows a configuration diagram of a conventional recording/reproducing apparatus. In FIG. 7, 1 is a tape-shaped recording medium (hereinafter referred to as tape). 3a is a supply reel that supplies the tape 1; 4a is a supply reel motor that drives the supply reel 3a; and 5a is a supply reel rotational speed detector that generates an FG pulse proportional to the rotation speed of the supply reel motor 4a. It is.

3b is a take-up reel that winds the tape 1; 4b is a take-up reel motor that drives the take-up reel 3b; and 5b is a take-up reel motor that generates an FG pulse proportional to the rotation speed of the take-up reel motor 4b. This is a reel rotation speed detector. A reel control circuit 6 outputs a control signal to the reel drive circuits 7a+7b in order to keep the tape speed constant using FG pulses generated from the two reel rotational speed detectors 5a+5b.

A reel drive circuit 7a+7b drives the two reel motors 4at4b in accordance with a control signal output from the reel control circuit 6. 10 is a capstan motor. A pinch roller 11 presses the tape 1 onto the capstan shaft of the capstan motor 10. 12 is a capstan rotation speed detector that generates an FG pulse proportional to the rotation speed of the capstan motor 10. A capstan control circuit 13 outputs a control signal to the capstan drive circuit 14 in order to rotate the capstan motor 10 at a predetermined speed using the FG pulse output from the capstan rotation speed detector 12. 14 is a capstan drive circuit that drives the capstan motor 10 in accordance with the output of the capstan control circuit 13. 15 and 16 are loading posts for winding the tape 1 around the cylinder 20. 20 is a rotating cylinder. 2
Reference numeral 1 denotes a cylinder rotation speed detector that generates an FG pulse proportional to the rotation speed of the rotating cylinder 20.

22 is a cylinder rotation position signal detector which outputs a PG pulse once per rotation of the rotary cylinder 20. 23 is the FG pulse output from the cylinder rotation speed detector 21 and the PG pulse output from the cylinder rotation position signal detector 22.
This is a cylinder control circuit that uses pulses to output a control signal for controlling the rotating cylinder 20 to a rotational speed corresponding to the tape speed at that time. 24 is a cylinder control circuit 23
This is a cylinder drive circuit that drives the rotary cylinder 20 in accordance with a control signal output from the rotary cylinder 20. 30 is rotating cylinder 2
This is the head attached to 0.

31 is a signal conversion circuit for converting the head output from the head 30 into a digital signal. 32 is a signal processing circuit that performs signal processing of the digital signal output from the signal conversion circuit 31.

The operation of the recording and reproducing apparatus configured as described above will be explained below.

In FIG. 7, in the PLAY state, the capstan motor 10 is rotated at a constant speed by the capstan rotational speed detector 12, the capstan control circuit 13, and the capstan drive circuit 14, and the tape 1 is transferred thereto by the pinch roller 11. By being crimped, the tape 1 is fed at a standard speed, sent out from the supply reel 3a, and wound onto the take-up reel 3b. At this time, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15, 16, and the data on the tape 1 is reproduced by the head 30 attached to the rotating cylinder 20, which is rotating at a standard rotational speed. . The reproduced head output is input to a signal conversion circuit 31 and converted into a digital signal.

This digital signal is input to the signal processing circuit 32, and the information is decoded by signal processing.

Next, at the time of FF, the reel control circuit 6 uses the FG pulses output from the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel rotation speed detector 5b of the take-up side reel motor 4b. and reel drive circuit 7a
, 7b control the supply reel motor 4a and the take-up reel motor 4b, and feed the tape 1 from the supply reel 3a to the take-up reel 3b at high speed. At this time as well, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15 and 16, and the standard rotational speed during PLAY is set so that the track direction component of the relative velocity between the head 30 and tape 1 is the same as during PLAY. The data on the tape 1 is reproduced by a head 30 attached to a rotary cylinder 20 that rotates at a predetermined speed faster than the above. The head output at this time is also a signal of the same frequency as during PLAY, and is input to the signal conversion circuit 31 and converted into a digital signal. This digital signal is input to the signal processing circuit 32, and the information is decoded by signal processing.

Similarly, during REW, the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel motor 4b
FG output from the take-up side reel rotation speed detector 5b of
Pulse and reel control circuit 6 and reel drive circuit 7
The supply side reel motor 4a and the take-up side reel motor 4b are controlled by al7b, and the tape 1
is sent from the take-up reel 3b to the supply reel 3a at high speed. At this time as well, tape 1 is connected to two loading posts 15.
16 around the rotating cylinder 20, and the track direction component of the relative velocity between the head 30 and the tape 1 is PL.
The data on the tape 1 is reproduced by the head 30 attached to the rotary cylinder 20, which rotates at a predetermined speed slower than the standard rotation speed during PLAY, so as to be the same as during AY.

The head output at this time is also a signal of the same frequency as during PLAY, and is input to the signal conversion circuit 31 and converted into a digital signal. This digital signal is input to the signal processing circuit 32, and the information is decoded by signal processing.

In general, when reading subcode information on a diagonally formed track during high-speed running, the component of the relative velocity between the head 30 and the tape 1 in the track direction (hereinafter referred to as relative velocity) always changes during PLAY. must be the same as Figure 8 below.

The rotational speed of the rotary cylinder 20 during high-speed running will be explained using the vector diagrams of FIGS. 9 and 10.

First, V = tape speed at standard speed = 8.15 (+ll
l1/5) VCYL: Cylinder peripheral speed at standard rotation speed = 3141.59 (am/5) VR: Head relative speed during PLAY = 3133.49 (I1m/s) θ Niji cylinder lead angle = G' 22 ' φ: If the difference between the track angle and the lead angle = 0°O'59.5'', the outer peripheral speed of the rotating cylinder 20 when the tape 1 is being fed in the FF direction at a speed n times the standard speed is: From the vector diagram in Figure 8, it becomes.For example, at 200x speed of FF, VcyLeas+pp+ = 4753・(mm/
s).

Similarly, when the tape 1 is being fed in the REW direction at a speed n times the standard speed, the outer peripheral speed of the rotary cylinder 20 is determined from the vector diagram in FIG.
It becomes COSψ. For example, at 200x REW speed, COSψ VevL2ss tt+tu+ = 1513, 4
9 (mm/s), and furthermore, at 400 times the speed of REV, COSψ VcvxalItRiu+=-106,51 (mm/'
S), and the cylinder must be rotated in the opposite direction.

Next, the tape is being fed at n times the standard speed,
In addition, if the tape speed changes from a state in which the rotating cylinder is rotating at a rotational speed that keeps the relative speed constant to a speed that is (n+m) times the standard speed, the discrepancy in tape speed can be corrected by the rotation of the rotating cylinder. When converted to speed deviation, for example, in the case of FF travel/row, from the vector diagram in Figure 10, ΔVcyL= Vcvzn+s+ -VcyLnCOS
φ CO3- CO3- Furthermore, when this is converted to the amount of relative velocity deviation, ΔV
R=ΔVcvtXCOSφ ” m X (V cYL
V R =mx2.585xtO-a =0.2585Xm (%).

Problem to be Solved by the Invention In such a conventional method, as the tape running speed increases during REW (as the value of n increases), the rotation speed of the rotary cylinder decreases, resulting in a relatively weak tape. The rotating cylinder stops at a certain speed, and data on the tape is likely to be skipped, making it impossible to increase the speed very much.

Furthermore, if the tape speed fluctuates during running, the relative speed changes significantly and the data on the tape becomes unreadable. Also,
Editing and dubbing also take the same amount of time as normal playback, and this poses a problem in that the workability is greatly affected.

The present invention solves the above problems, and even when the tape speed is high during REW, the rotation speed of the rotating cylinder does not slow down too much, preventing data on the tape from being skipped.
It is possible to increase the speed of W running, and even if the tape speed fluctuates during running, the data on the tape can be reliably read without much change in relative speed. To provide a recording and reproducing device which can greatly improve work efficiency during editing and dubbing by performing playback at a higher speed than normal playback while also performing normal playback.

Means for Solving the Problems To achieve this object, the recording and reproducing apparatus of the present invention has a first configuration in which a tape-shaped recording medium having tracks formed diagonally with respect to the running direction is run at a first constant speed. tape-shaped recording medium running means capable of feeding at at least two types of speeds: a standard speed and a second constant speed faster than the standard speed; a tape-shaped recording medium high-speed traveling means for running the tape-shaped recording medium at high speed; a rotating cylinder to which a head is attached; a rotational speed detecting means for generating a pulse proportional to the number of rotations of the rotating cylinder; a control means for controlling the rotational speed of the rotary cylinder using the control means; and a case where the tape-shaped recording medium is run at the first constant speed and the rotary cylinder is rotated at a standard rotational speed that is the first constant rotational speed. and a second head output when the tape-shaped recording medium is run at the second constant speed and the rotary cylinder is rotated at a second constant rotation speed faster than the standard rotation speed. signal converting means for converting a head output having a frequency of and respective clocks necessary when the signal converting means and the signal processing means process the head output of the first frequency, and respective clocks necessary when the signal converting means and the signal processing means process the head output of the second frequency. and a clock generating means for supplying the clock.

Furthermore, as a second configuration, the tape-shaped recording medium in which tracks are formed diagonally with respect to the running direction is arranged in at least two types: a standard speed that is a first constant speed, and a second constant speed that is faster than the standard speed. tape-shaped recording medium running means capable of feeding the tape-shaped recording medium at a speed of; tape-shaped recording medium high-speed running means that runs the tape-shaped recording medium faster than any tape speed set by the tape-shaped recording medium running means;
a rotating cylinder to which a head is attached; a rotational speed detection means for generating a pulse proportional to the rotational speed of the rotating cylinder; a control means for controlling the rotational speed of the rotating cylinder using the pulse; and a tape-shaped recording medium. a first signal converting means for converting a head output of a first frequency into a digital signal when the rotating cylinder is rotated at a standard rotational speed that is the first constant rotational speed; a first signal processing means for processing a digital signal of the first frequency outputted from the first signal converting means; a tape-shaped recording medium running at the second constant speed; a second signal converting means for converting a head output at a second frequency into a digital signal when the head is rotated at a second constant rotational speed faster than the standard rotational speed; and an output from the second signal converting means. a second signal processing means for processing the digital signal of the second frequency, and a signal switching means for switching the input source of the head output between the first signal converting means and the second signal converting means. It is configured.

Effect of the Invention With the above-described configuration, when reading data on a tape during high-speed running, the relative speed between the tape and the head is made faster than at standard speed, thereby increasing the rotational speed of the rotary cylinder and making it more stable at higher speeds. This makes it possible to realize search operations that In addition, playback at standard speed and playback at a fixed speed faster than the standard speed are possible, greatly improving work efficiency during editing and dubbing.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a recording/reproducing apparatus according to a first embodiment of the present invention. In FIG. 1, the difference in configuration from the conventional example shown in FIG. 7 is component 31 al 32
a and 34, and the other components are the same.

Here, 3a, 3b to 7a, 7b are the constituent elements of the tape-shaped recording medium high-speed running means, and 10 to 14 are the constituent elements of the tape-shaped recording medium running means.

31a is the head output at the first frequency when the tape 1 is running at a standard speed and the rotary cylinder 20 is rotated at the standard rotation speed, and the head output at the first frequency when the tape 1 is running at a speed twice the standard speed and the rotary cylinder 20 is rotated at the standard speed. This is a signal conversion circuit that converts a head output of a second frequency when the head is rotated at a rotation speed twice the standard rotation speed into a digital signal. 32a is a signal processing circuit that performs signal processing of the first frequency digital signal and the second frequency digital signal output from the signal conversion circuit 31a. 34 is a signal conversion circuit 31
This is a clock generation circuit that generates a clock to be supplied to the signal processing circuit 32a and the signal processing circuit 32a according to the head output mode information.

Here, the signal conversion circuit 31a and the signal processing circuit 32a
The contents will be explained using FIG.

In FIG. 2, 50 is a standard dual amplifier that amplifies the head output of the first frequency, and 50a is a double dual amplifier that amplifies the head output of the second frequency. Reference numeral 51 denotes an amplifier switching circuit that switches the output of the standard speed amplifier 50 and the output of the double amplifier 50a to the next digital section 55 in accordance with the head output mode information. 52 is an integrating circuit, 53 is an equalizer, and 54 is a PLL circuit.

The operation of the recording and reproducing apparatus configured as described above will be explained below.

In FIG. 1, in a normal PLAY state, a capstan motor 10 is rotated at a constant speed by a capstan rotational speed detector 12, a capstan control circuit 13a, and a capstan drive circuit 14, and a tape is inserted into the capstan motor 10.
The tape 1 is fed at a standard speed by being pressed by the pinch roller 11, and is sent out from the supply reel 3a and wound onto the take-up reel 3b. At this time, the tape 1 is wound around the rotating cylinder 20 by two loading posts 15 and 16, and the data on the tape 1 is played back by the head 30 attached to the rotating cylinder 20, which is rotating at a standard rotation speed. Ru. At this time, the head output mode information is standard speed, and is input to the amplifier switching circuit 51 in the signal conversion circuit 31a in FIG.
is input to. A standard speed clock is input to the digital section 55 by the clock generation circuit 34 of FIG. 1 in accordance with the head output mode information.

Similarly, the clock generation circuit 3 is also connected to the signal processing circuit 32a.
4, the standard speed clock is input. As a result, the signal conversion circuit 31a and the signal processing circuit 32
a can perform signal conversion and signal processing at standard speed, and can decipher information.

Next, during editing and dubbing, the capstan motor 10 is rotated at a constant speed by the capstan rotation speed detector 12, the capstan control circuit 13a, and the capstan drive circuit 14, and the tape is
is pressed by the pinch roller 11, so that the tape 1 is fed at twice the standard speed, and is sent out from the supply reel 3a and wound onto the take-up reel 3b.

At this time, the tape 1 has two loading posts 15,
The rotary cylinder 20 is wound around the rotary cylinder 20 by IE3 and is rotating at twice the standard rotation speed.
The data on the tape 1 is reproduced by the head 30 attached to the head 30 and input to the signal conversion circuit 31a. At this time, the head output mode information is double speed, and is input to the amplifier switching circuit 51 in the signal conversion circuit 31a in FIG. A clock for double speed is inputted to the digital section 55 by the clock generation circuit 34 shown in FIG. 1 in accordance with the head output mode information. Similarly, the clock switching circuit 34 inputs the clock for double speed to the signal processing circuit 32a. As a result, the signal conversion circuit 31a and the signal processing circuit 32a are
It enables signal conversion and signal processing at twice the speed, making it possible to decode information.

Next, during FF, the FG pulse output from the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel rotation speed detector 5b of the take-up side reel motor 4b, the reel control circuit 6 and the reel Drive circuit 7 al
7b controls the supply reel motor 4a and the take-up reel motor 4b, and feeds the tape 1 from the supply reel 3a to the take-up reel 3b at high speed. At this time as well, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15 and 16, and the track direction component of the relative velocity between the head 30 and the tape 1 is the same as that during double speed playback. The data on the tape 1 is reproduced by a head 30 attached to a rotating cylinder 20 that rotates at a higher speed than that of the tape 1. The head output at this time is a signal with twice the frequency as that when reproduced at the standard speed, and is input to the signal conversion circuit 31a and converted into a digital signal as in the case of editing and dubbing. This 2
The digital signal of twice the frequency is input to the signal processing circuit 32a, and the information is decoded by signal processing.

Similarly, during REW, the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel motor 4b
FG output from the take-up side reel rotation speed detector 5b of
pulse, reel control circuit 6 and reel drive circuit 7a,
7b controls the supply reel motor 4a and the take-up reel motor 4b, and feeds the tape 1 from the take-up reel 3b to the supply reel 3a at high speed. At this time as well, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15 and 16, and the track direction component of the relative velocity between the head 30 and the tape 1 is the same as that during double speed playback. The data on the tape 1 is reproduced by a head 30 attached to a rotating cylinder 20 that rotates at a slower speed than that of the tape 1. The head output at this time is a signal with twice the frequency when playing back at the standard speed, and the signal conversion circuit 31
a and is converted into a digital signal.

This double frequency digital signal is sent to the signal processing circuit 32.
a, and the information is decoded by signal processing.

When reading subcode information on a diagonally formed track during high-speed running as in the conventional example, the component of the relative velocity between the head 30 and the tape 1 in the track direction (hereinafter referred to as relative velocity) is It must always be the same as when driving at twice the standard speed. Below, Figures 4 and 5
The rotational speed of the rotary cylinder 20 during high-speed running will be explained using the vector diagram shown in FIG.

First, VT2: Tape speed twice the standard speed = 18. 3
(mm/5) Vevti: Cylinder outer circumferential speed twice the standard speed =
6283. 19 (mm/5) VR2: Head relative speed twice the standard speed = 626
6. 99 (mm/s) θ: Cylinder lead angle = 6'22'ψ: Difference between track angle and lead angle = O'O'59.5'', then in the FF direction at a speed n times the standard speed. tape 1
From the vector diagram in FIG. 4, the outer peripheral speed of the rotary cylinder 20 when the is being fed is as follows.

For example, at 200x speed of FF, Vcvt22s+pp+ = 7888°99 (mm,
/s).

Similarly, to Standard speed n in the REW direction Rotation series when tape 1 is being fed at double speed The outer circumferential speed of the cylinder 20 is determined by the vector shown in Fig. 5. From the torque diagram, becomes.

For example, at 200x REW speed, CO8ψ COSψ VcvL2aetRiu) = 4646. 99 (
mm/s) and when the speed is 400 times that of REW, VcvL, @su+tw+ = 302 e! , 9
9 (mm/S).

Next, the tape is being fed at n times the standard speed,
Furthermore, if the tape speed changes from a state in which the rotating cylinder is rotating at a rotational speed keeping the relative speed constant to a speed that is (n + m) times the standard speed, the discrepancy in tape speed can be calculated by calculating the rotation of the rotating cylinder. When converted to speed deviation,
For example, in the case of FF running, from the vector diagram in Figure 6, ΔVcvc= VcyL+n*s+ Vcyzn+V
R2 (n+m) =□+ COSψ 2 COSψ COSψ 2 R2 2CO3- Furthermore, when this is converted into the amount of relative velocity deviation, ΔV
R=ΔVevtX COSψ ”X (VCYL2XCOSψ−VB2)
The rate of change in relative velocity is ΔVRm X (VevL2X CO3−−VR2)
VB2 2XVR2 = mX1.292X10-3 ~ 0.1292Xm (%).

As described above, according to this embodiment, by enabling the signal conversion circuit 31a and the signal processing circuit 32a to perform processing at the standard speed frequency and twice the frequency, the FF/
When reading data on a tape with REW, by setting the head output to twice the frequency of standard speed playback, it is possible to reduce data skipping even when the cylinder speed is high, allowing for faster search operation. can be realized. Furthermore, since the influence of fluctuations in tape speed during high-speed running on relative speed can be reduced to 172 in the conventional example, data can be read more reliably.

Conversely, if the cylinder speed becomes too high during FF running and the noise generated by the cylinder becomes a problem, reduce the cylinder speed so that the head output is at the frequency of standard speed playback to reduce the noise generated by the cylinder. can be held down.

Furthermore, by performing reproduction at twice the standard speed during dubbing and editing, the dubbing and editing time can be reduced to 1/2.

In the first embodiment, the capstan motor 10 that feeds the tape 1 at a constant speed, the supply reel motor 4a that drives the supply reel 3a, and the take-up reel motor 4b that drives the take-up reel 3b are all separate. However, a plurality of these motors may be composed of the same motor.

FIG. 3 shows a configuration diagram of a recording/reproducing apparatus in a second embodiment of the present invention.

In Fig. 3, the structural differences from the conventional example shown in Fig. 7 are as follows.
The components are 31b, 32b, and S3, and the other components are the same.

Here, 3 al 3 b to 7 al 7 b are the constituent elements of the tape-shaped recording medium high-speed traveling means, and 10 to
14 are the constituent elements of the tape-shaped recording medium traveling means. A second converter 31b converts the head output of the second frequency into a digital signal when the tape 1 is run at twice the standard speed and the rotary cylinder 20 is rotated at twice the standard speed. This is a signal conversion circuit. 32b is a second signal processing circuit that performs signal processing of the digital signal of the second frequency output from the second signal conversion circuit 31b.

33 is a signal switching circuit for switching and sending the output of the head 30 to the first signal conversion circuit 31 and the second signal conversion circuit 31b.

The operation of the recording and reproducing apparatus configured as described above will be explained below.

In FIG. 3, in a normal PLAY state, the capstan motor 10 is rotated at a constant speed by the capstan rotation speed detector 12, the capstan control circuit 13a, and the capstan drive circuit 14, and the tape
By being pressed by the pinch roller 11, the tape l is fed at a standard speed, sent out from the supply reel 3a, and wound onto the take-up reel 3b. At this time, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15, 16, and the data on the tape 1 is reproduced by the head 30 attached to the rotating cylinder 20, which is rotating at a standard rotational speed. . The head output at this time is a signal at the standard speed, and the head output mode information is the standard speed. Therefore, this head output is inputted to the first signal conversion circuit 31 via the signal switching circuit 33 and converted into a digital signal. This digital signal at the standard speed is input to the first signal processing circuit 32,
Information is decoded by signal processing.

Next, during editing and dubbing, the capstan motor 10 is rotated at a constant speed by the capstan rotation speed detector 12, the capstan control circuit 13a, and the capstan drive circuit 14, and the tape is
is pressed by the pinch roller 11, so that the tape 1 is fed at twice the standard speed, and is sent out from the supply reel 3a and wound onto the take-up reel 3b.

At this time, the tape 1 is placed between the two loading posts 15.
Data on the tape 1 is reproduced by a head 30 which is wound around the rotating cylinder 20 by the tape 16 and is attached to the rotating cylinder 20, which is rotating at twice the standard speed. The head output at this time is a signal with twice the frequency of reproduction at the standard speed, and the head output mode information indicates the double speed. Therefore, this head output is inputted to the second signal conversion circuit 31b via the signal switching circuit 33 and converted into a digital signal. This digital signal of twice the frequency when reproduced at the standard speed is input to the signal processing circuit 32b, and the information is decoded by signal processing, thereby realizing double speed reproduction.

Next, during FF, the FG pulse output from the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel rotation speed detector 5b of the take-up side reel motor 4b, the reel control circuit 6 and the reel Drive circuits 7a, 7b
The supply side reel motor 4a and the take-up side reel motor 4b are controlled by 1:1 to send the tape 1 from the supply side reel 3a to the take-up side reel 3b at high speed. At this time as well, the tape 1 is wound around the rotating cylinder 20 by the two loading points (15 and 16), and the tape 1 is played back at double speed so that the track direction component of the relative velocity between the head 30 and the tape 1 is the same as during double speed playback. The data on the tape 1 is reproduced by a head 30 attached to a rotating cylinder 20 that rotates at a higher speed than the normal speed. The head output at this time is a signal with twice the frequency of reproduction at the standard speed, and the head output mode information indicates the double speed. Therefore, this head output is inputted to the second signal conversion circuit 31b via the signal switching circuit 33 and converted into a digital signal.

This double frequency digital signal is input to the second signal processing circuit 32b, and the information is decoded by signal processing.

Similarly, during REW, the supply side reel rotation speed detector 5a of the supply side reel motor 4a and the take-up side reel motor 4b
FG output from the take-up side reel rotation speed detector 5b of
pulse, reel control circuit 6 and reel drive circuit 7a,
7b controls the supply reel motor 4a and the take-up reel motor 4b, and feeds the tape 1 from the take-up reel 3b to the supply reel 3a at high speed. At this time as well, the tape 1 is wound around the rotating cylinder 20 by the two loading posts 15 and 16, and the track direction component of the relative velocity between the head 30 and the tape 1 is the same as that during double speed playback. Data on the tape 1 is reproduced by a head 30 attached to a rotary cylinder 2o that rotates at a slower speed than that of the tape 1. The head output at this time is a signal with twice the frequency of reproduction at the standard speed, and the head output mode information indicates the double speed. Therefore,
This head output is input to the signal conversion circuit 31b via the signal switching circuit 33 and converted into a digital signal. This double frequency digital signal is input to the signal processing circuit 32b, and the information is decoded by signal processing.

The rotational speed of the rotary cylinder 20 when reading subcode information on a track formed diagonally on the tape during high-speed running, and the rate of change in relative speed when the tape speed fluctuates, are the same as in the first embodiment. They are the same and are as follows.

The outer peripheral speed of the rotating cylinder 20 when the tape 1 is being fed in the FF direction at a speed n times the standard speed is COSψ 2 CO3-. Similarly, when the tape 1 is being fed in the REW direction at a speed n times the standard speed, the outer peripheral speed of the rotary cylinder 20 is CO3-2 CO3-. The rate of change in relative velocity is zVll m
×(■cvL2×CO8ψ−V R2)VR22XVR
It becomes 2.

As described above, according to this embodiment, the signal conversion circuit 31 and signal processing circuit 32 at standard speed, and the signal conversion circuit 31b and signal processing circuit 32b at double speed are connected to signal switching circuit 33.
When reading data on a tape with FF/REW, by switching the head output to twice the frequency of standard speed playback, the cylinder speed becomes faster and data skipping can be reduced. , it is possible to realize faster search travel. Furthermore, the influence of fluctuations in tape speed during high-speed running on the relative speed can be reduced to half that of the conventional example, so data can be read more reliably.

Conversely, if the cylinder speed becomes too high during FF running and the noise generated by the cylinder becomes a problem, reduce the cylinder speed so that the head output is at the frequency of standard speed playback to reduce the noise generated by the π cylinder. can be held down.

Furthermore, by performing playback at twice the standard speed during dubbing and editing, the dubbing and editing time can be reduced to 1/2.

In the second embodiment, the capstan motor 10 that feeds the tape 1 at a constant speed, the supply reel motor 4a that drives the supply reel 3a, and the take-up reel motor 4b that drives the take-up reel 3b are all separate. However, a plurality of these may be composed of the same motor.

Effects of the Invention As described above, when reading data on a tape with FF/REW, the head output is set to twice the frequency of standard speed playback, thereby increasing the cylinder speed and reading data. It is possible to reduce skipping and realize faster search travel. Furthermore, the influence of fluctuations in tape speed during high-speed running on the relative speed can be reduced to half that of the conventional example, so data can be read more reliably.

On the other hand, if the cylinder speed becomes too high during FF running and the noise generated by the cylinder becomes a problem, reduce the cylinder speed so that the head output matches the frequency of standard speed playback to suppress the noise generated by the cylinder. I can do it.

Furthermore, during editing and dubbing, by performing playback at twice the standard speed, the editing and dubbing time can be shortened to 1/2, which has a great practical effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a recording/reproducing apparatus in a first embodiment of the present invention, FIG. 2 is a detailed block diagram of a signal conversion circuit 31a and a signal processing circuit 32a in the first embodiment of the present invention, and FIG. FIG. 3 is a block diagram of a recording/reproducing apparatus according to the second embodiment of the present invention, and FIG. 4 is a diagram showing the relative speed between the tape and the head during FF running of the recording/reproducing apparatus according to the first and second embodiments of the present invention. Vector diagram, FIG. 5 is a vector diagram of the relative velocity of the tape and head during REW running of the recording/reproducing apparatus in the first and second embodiments of the present invention, and FIG. FF of the recording/reproducing device in the embodiment
A vector diagram of the relative speed of the tape and the head when the tape speed changes during running. Figure 7 is a configuration diagram of a conventional recording/playback device. Figure 8 is a diagram of the relative speed of the tape and head during FF running of the conventional recording/playback device. A vector diagram of the relative speed. Figure 9 is a vector diagram of the relative velocity between the tape and the head during REW running in a conventional recording and reproducing apparatus. Figure 10 is a vector diagram of the FF of the conventional recording and reproducing apparatus.
FIG. 4 is a vector diagram of the relative speed between the tape and the head when the tape speed changes during running. 10... Capstan motor, 11... Pinch roller, 12... Capstan rotation speed detector,
13.13a...capstan control circuit, 14.
...Capstan drive circuit, 3 al 3 b...
Reel, 4a, 4b... Reel motor, 5a,
5b-- Reel rotation speed detector, 6... Reel control circuit, 7 al 7 b... Reel drive circuit, 20... Rotating cylinder, 21... Cylinder rotation speed detector, 23.23a. ...Cylinder control circuit, 31.31a, 31b-signal conversion circuit, 3
2. 32a, 32b...signal processing circuit, 3
3... Signal switching circuit, 34... Clock generation circuit,
50+ 50a...Amplifier, 51...Amplifier switching circuit, 52...Integrator circuit, 53...Equalizer, 54...PLL circuit.

Claims (2)

[Claims] (1) A tape-shaped recording medium in which tracks are formed diagonally with respect to the running direction is fed at at least two types of speeds: a first constant speed, which is a standard speed, and a second constant speed, which is faster than the standard speed. a tape-shaped recording medium running means capable of running the tape-shaped recording medium, a tape-shaped recording medium high-speed running means for running the tape-shaped recording medium at a higher speed than any tape speed set by the tape-shaped recording medium running means; a cylinder; a rotational speed detection means for generating a pulse proportional to the rotational speed of the rotary cylinder; a control means for controlling the rotational speed of the rotary cylinder using the pulse; the head output at a first frequency when the rotary cylinder is rotated at a standard rotation speed that is a first constant rotation speed, and the tape-shaped recording medium is run at the second constant speed; signal converting means for converting into a digital signal a head output at a second frequency when the rotating cylinder is rotated at a second constant rotational speed faster than the standard rotational speed; and a signal converting means output from the signal converting means. a signal processing means for processing the digital signal of the first frequency and the digital signal of the second frequency, and the signal converting means and the signal processing means processing the head output of the first frequency; each clock required, and the second
A recording/reproducing apparatus comprising: clock generating means for supplying each clock necessary for processing a head output having a frequency of . (2) A tape-shaped recording medium in which tracks are formed diagonally with respect to the running direction is fed at at least two types of speeds: a first constant speed, which is a standard speed, and a second constant speed, which is faster than the standard speed. a tape-shaped recording medium running means capable of running the tape-shaped recording medium, a tape-shaped recording medium high-speed running means for running the tape-shaped recording medium at a higher speed than any tape speed set by the tape-shaped recording medium running means; a cylinder; a rotational speed detection means for generating a pulse proportional to the rotational speed of the rotary cylinder; a control means for controlling the rotational speed of the rotary cylinder using the pulse; a first signal converting means for converting a head output of a first frequency into a digital signal when the rotating cylinder is rotated at a standard rotational speed that is a first constant rotational speed; a first signal processing means for processing the digital signal of the first frequency outputted from the signal conversion means; running the tape-shaped recording medium at the second constant speed; and rotating the rotating cylinder at a speed lower than the standard rotational speed. a second signal converting means for converting a head output at a second frequency into a digital signal when the head is rotated at a second constant rotational speed which is faster; and the second frequency output from the second signal converting means. a second signal processing means for processing a digital signal; and a signal switching means for switching an input destination of a head output between the first signal converting means and the second signal converting means.