JPH04182914A - Tape-shaped medium recording and reproducing device - Google Patents

Abstract

PURPOSE:To allow a tape to travel at the higher speed than the conventional speed at which reproducing can be made so that the reproducing of recorded signals can be made by providing a state switching means which operates a low-speed transfer means and a prescribed information generating means at the time of recording and operates a high-speed transfer means at the time of high-speed transferring. CONSTITUTION:This device has the state switching means which operates the low-speed transfer means 4 and the prescribed information generating means 6 at the time of the recording and operates the high-speed transfer means 5 at the time of the high-speed transferring. Namely, the state switching means 13 operates the low-speed transfer means 4 and the prescribed information generating means 6 at the time of the information recording and, therefore, the tape 1 is controlled to a recording speed by the low-speed transfer means 4 and the output of the prescribed information generating means 6 is supplied to a head 2 driven by a helical driving means 3 and is recorded in the region at one end of diagonal tracks. On the other hand, the state switching means 13 operates the high-speed transfer means 5 at the time of the high-speed transferring and the tape 1 is transferred at the higher speed than at the time of the recording. The information recorded in the region at one end of the tracks is reproduced by a stationary head at this time and is decoded by a decoding means 12. High-speed retrieval is possible while the recording contents are checked in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape-like medium recording and reproducing apparatus used in video tape recorders (hereinafter abbreviated as VTR), digital tape recorders, and the like.

2. Description of the Related Art In recent years, in tape media recording and reproducing apparatuses (eg, VTRs), there has been a demand for longer recording times and higher speed access. Regarding high-speed access, an important factor is increasing tape running speed along with data reproduction.

Conventionally, VTRs using the helical scan recording method tilt the rotating direction of a cylindrical rotating drum and the running direction of the magnetic tape, and run the magnetic tape so as to wrap it around the rotating drum. By rotating it, a predetermined inclination angle is formed with respect to the tape running direction, and a video signal is recorded on the magnetic tape.

With the above configuration, when performing special playback such as quick motion playback, the trajectory of the magnetic head changes with respect to the track on the magnetic tape because the signal recorded at a tape running speed different from that during recording is played back, causing It becomes difficult to trace completely.

FIG. 8 shows an explanatory diagram illustrating the locus of the magnetic head on the magnetic tape. 301 is a head trajectory during recording or normal reproduction. A head trajectory 301 is synthesized by a tape speed vector 302 and a magnetic head speed vector 303 caused by the rotating drum. When the tape running speed changes, for example, when the tape speed quadruples, the head trajectory 30 is a composite of the tape speed vector 304 and the magnetic head speed vector 303 caused by the rotating drum.
5, it passes over several tracks at a time, and noise occurs on the playback screen. In order to solve this problem, a moving means using a bimorph element has been developed that allows the magnetic head to move in the direction of arrow 306 and trace a track completely.

An example of a conventional tape-shaped medium recording and reproducing apparatus (for example, Japanese Patent Application Laid-open No. 119622/1983) incorporating the above-mentioned moving means will be described below with reference to the drawings.

FIG. 9 shows a sectional view of a rotary drum using a piezoelectric element of a conventional tape-shaped medium recording/reproducing device. 401 is a magnetic head, 402 is a bimorph element which is a moving means with the magnetic head 401 fixed to its tip, and 403 is a bimorph element 40.
2 is fixed, and a rotating drum rotates at a constant rotation speed, 40
4 is a fixed drum fixed to the VTR body, 405 is a slip ring that supplies a driving voltage to the bimorph element 402, and 406 is a magnetic tape wound around the drums 403 and 404 at a predetermined inclination.

The operation of the tape-shaped medium recording and reproducing apparatus configured as described above will be explained below. When performing special playback such as quick motion playback where the tape running speed is different from that during recording, the amount of movement of the magnetic head 401 is set so that the magnetic head 401 traces the track completely, and control is performed according to the amount of movement. Voltage is supplied to bimorph element 402 via slip ring 405 . Due to the control voltage,
The bimorph element 402 deforms in the direction shown by the arrow, and the magnetic head 401 on the bimorph element 402 moves. That is, the amount of movement of the magnetic head 401 is set in advance according to each mode of special playback, and the magnetic head 401 is moved by the amount of movement to trace the track.

Problems to be Solved by the Invention However, in the above configuration, the bimorph element 4
The shape of 02 is restricted by the shape of the rotating drum 403,
It is difficult to design a large movable range, and in order to avoid noise in the reproduced image, only double-speed special reproduction can be performed.

Therefore, if the tape is run at a high speed that causes noise in the reproduced image, the number of noises can be reduced by the amount of overlay speed that does not cause noise, but as the tape speed increases, the effectiveness of the conventional technology decreases. , the noise component in the reproduced image increases. Furthermore, if the rotation speed of the rotary drum 403 is changed in order to increase the tape speed and match the transfer speed of the playback signal to the transfer speed during recording, the rotation of the rotary drum 403 may have to be stopped depending on the tape running direction. The problem was that the recorded signal could not be played back and images could not be searched at high speed.

In order to solve the above problems, a first object of the present invention is to reproduce a recorded signal by running a tape at a higher speed than the conventional reproduction speed.

A second object of the present invention is to reproduce recorded signals by running the tape at a higher speed than conventionally possible reproduction speeds without providing a new reproduction head outside the drum.

A third object of the present invention is to run the tape at a higher speed than conventional playback speeds and to play back recorded signals at any speed.

Means for Solving the Problems In order to achieve the above objects, a tape-like medium recording/reproducing apparatus according to a first aspect of the invention includes at least one head for recording and reproducing information in close proximity to a tape-like medium; a helical drive means that scans diagonally with respect to the longitudinal direction of the tape-like medium; a low-speed transport means that transports the tape-like medium at a recording speed; and a high-speed transport means that transports the tape-like medium at a higher speed than during recording. , a predetermined information generating means for supplying predetermined information to be recorded on a partial area of the track to the disk, and at least one for reproducing the predetermined information recorded on the partial area of the track. a fixed head, a decoding means for decoding the output signal of the fixed head, and a state switching means for operating the low-speed transfer means and the predetermined information generation means during recording, and for operating the high-speed transfer means during high-speed transfer. ing.

Further, the tape-shaped medium recording/reproducing apparatus of the second invention includes at least one head for recording and reproducing information in close proximity to the tape-shaped medium, and the head is arranged obliquely with respect to the longitudinal direction of the tape-shaped medium. Helical drive means for scanning; head fixing means for fixing the head at a predetermined position on the tape-like medium; low-speed transport means for transporting the tape-like medium at a recording speed; a high-speed transport means for transporting the head; a predetermined information generating means for supplying the head with predetermined information to be recorded in a part of the track; a decoding means for decoding the output signal of the helical head; The apparatus includes a driving means, a state switching means for operating the low-speed transfer means and the predetermined information generation means, and for operating the head fixing means and the high-speed transfer means during high-speed transfer.

Further, the tape-shaped medium recording/reproducing apparatus of the third invention includes at least one head for recording and reproducing information in proximity to the tape-shaped medium, and a head for recording and reproducing information in the longitudinal direction of the tape-shaped medium. a helical drive means for scanning diagonally;
A low-speed transport means for transporting the tape-shaped medium at a recording speed; a high-speed transport means for transporting the tape-form medium at a higher speed than during recording; and supplying predetermined information to be recorded on a part of the track to the head. at least one reproducing head for reproducing the predetermined information recorded in a partial area of the track; relative movement means for moving a reproduction head and keeping the relative speed of the tape-shaped medium and the reproduction head constant; decoding means for decoding the output signal of the fixed head; and during recording, the low-speed transport means and the predetermined information generation. and state switching means for operating the high-speed transfer means during high-speed transfer.

Operation According to the configuration of the first invention described above, when recording information, the state switching means operates the low-speed transport means and the predetermined information generation means, so that the tape-shaped medium is controlled to the recording speed by the low-speed transport means, and the predetermined information generation means operates. The output is supplied to a head driven by a helical drive means and recorded in the area of one end of the diagonal track. On the other hand, during high-speed transfer, the state switching means operates the high-speed transfer means, so the tape-shaped medium is transferred at a higher speed than during recording. At this time, high-speed search operation is possible by reproducing information recorded in an area at one end of the track with a fixed head and decoding it with a decoding means.

Further, according to the configuration of the second invention, when recording information, the state switching means operates the helical drive means, the low-speed transport means, and the predetermined information generation means, so that the tape-like medium is controlled to the recording speed by the low-speed transport means, and the predetermined information is The output of the generating means is supplied to a head driven by a helical drive means and recorded in an area at one end of the diagonal track. On the other hand, during high-speed transfer, the state switching means operates the head fixing means and the high-speed transfer means, so that the head is fixed at a predetermined position on the tape-shaped medium, and the tape is transferred at a higher speed than during recording.
The reproduction output from the head is decoded by a decoding means. In other words, a high-speed search operation is possible by reproducing the recorded signal with a conventional head and decoding it with a decoding means, without using a fixed head for reproduction only.

Further, according to the configuration of the third invention, since the state switching means operates the low-speed transport means and the predetermined information generation means when recording information, the tape-shaped medium is controlled to the recording speed by the low-speed transport means, and the output of the predetermined information generation means is controlled by the low-speed transport means. is supplied to a head driven by a helical drive means and recorded in an area at one end of the diagonal track. On the other hand, during high-speed transfer, the state switching means operates the high-speed transfer means, and the relative movement means moves the tape-shaped medium in the longitudinal direction on the position where the predetermined information is recorded.
It operates to maintain the relative speed between the playback head and the tape-shaped medium at a constant speed. The output data of the reproducing head has a constant transfer rate and is decoded by the decoding means. In other words, a high-speed search operation is possible by running a tape-like medium at an arbitrary speed higher than the conventional playback speed, reproducing the recorded signal, and decoding it with a decoding means.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a tape-shaped medium recording and reproducing apparatus according to an embodiment of the first invention (hereinafter abbreviated as the first embodiment).

In FIG. 1, 1 is a magnetic tape, 1a and lb are posts forming a traveling path for the magnetic tape 1, 2a and 2b are magnetic heads for recording signals on the magnetic tape 1, and 3 is a magnetic head 2a and 2b. Helical drive means for scanning diagonally with respect to the longitudinal direction of the magnetic tape 1; 31 is a drum to which the magnetic heads 2a and 2b are attached and rotates while winding diagonally around the magnetic tape 1; 32 is a drum for rotating the drum 31 at a constant speed. A control circuit 4 is a low-speed transfer means for transferring the magnetic tape 1 at a recording speed, 41 is a capstan that rotates at a constant speed, and 42 is a transfer means for transferring the magnetic tape 1 to the capstan 4.
A pinch roller 43 rotates the capstan 41 at a constant speed by bringing the pinch roller 42 and capstan 41 into close contact with each other when an operation command is issued, and when a non-operation command is issued, the pinch roller 42 and capstan 41 are separated and the capstan 41 is rotated at a constant speed. A capstan control circuit for stopping the rotation of the stun 41; 5 a high-speed transport means for transporting the magnetic tape 1 at a speed substantially equal to the track forming speed during recording; 51 and 52 a reel for winding the magnetic tape 1; 53; is magnetic tape 1
54 is a reel control circuit that outputs a command to drive the reel 51 or 52 at high speed in accordance with the operation command and the output signal of the rotation direction switching circuit 53; 55 and 56 are Rotational torque corresponding to the output command of the reel control circuit 54 is applied to the reels 51 and 52, respectively.
6 is an address generation circuit that receives an operation command and generates tape position information to be recorded in the end area of the track of the magnetic tape 1; 7 is an address generation circuit that receives an operation command and generates a moving image signal; A still image information generation circuit captures one frame information and generates temporally divided video information to be recorded in the end area of the track of the magnetic tape 1; 71 is an AD that converts the input video signal into digital information; A conversion circuit 72 stores digital information for one frame of video obtained by the AD conversion circuit 71, and a frame memory 73 converts the digital information output by the frame memory 72 into a video signal in synchronization with a read timing signal. A DA conversion circuit 74 converts the drum 31 at the time of operation command.
a read timing generation circuit 7 that outputs successive timing signals for converting the digital information in the frame memory 72 into a video signal in the DA conversion circuit 73 in synchronization with the rotational phase of the frame memory 72;
5 receives the successive timing signal from the successive timing generation circuit 74, outputs a read clock signal to the DA converter circuit 73, sequentially outputs a read address signal in units of horizontal synchronization signals to the frame memory 72, and a read control circuit 76 that outputs a final read timing signal indicating digital/analog conversion (hereinafter abbreviated as D/A conversion);
is a terminal that receives a final read timing signal, performs analog/digital conversion (hereinafter abbreviated as A/D conversion) of one frame of the input video signal, and outputs a write timing signal for writing to the frame memory 72. Including timing generation circuit, 7
7 is a write control that receives a write timing signal and outputs a write clock signal for digitizing the video signal for one frame in the A/D conversion circuit 71 and a write address signal for the frame memory 72. A circuit 8 switches between the output signal of the address generation circuit 6 and the input video signal according to the first switching signal 8a, and outputs the signal to the magnetic head 2a, and outputs the same to the magnetic head 2a, and a second switching signal 8b.
a signal switcher that switches between the output signal of the still image information generating circuit 7 and the input video signal according to the signal and outputs the same to the magnetic head 2b;
Reference numeral 9 denotes magnetic heads 2a and 2b attached to the drum 31.
10 is a signal switching device according to the output of the rotational phase detector 9 so that the output signals of the address generation circuit 6 and the still image information generation circuit 7 are recorded at the end of the track. 8 first and second switching signals 8
111 is a fixed head having the same azimuth as the magnetic head 2a in order to read the tape position information recorded at the end of the track;
2 is a fixed head having the same azimuth as the magnetic head 2b for reading still image information recorded at the end of the tracks; 11 is for bringing the fixed heads 111 and 112 into contact with the track end of the magnetic tape 1; head post,
12 is a decoding circuit that creates tape position data or still image video signals from the output of the fixed head 111 or 112;
13 is a low speed transfer means 4 and an address generation circuit 6 during recording.
It is a state switching circuit that operates the still image information generation circuit 7 and operates the high-speed transfer means 5 during high-speed transfer.The helical drive means 3 consists of a drum 31 and a drum control circuit 32, and the low-speed transfer means 4 consists of a cap. The high-speed transfer means 5 is composed of a stun 41, a pinch roller 42, and a capstan control circuit 43, and a reel 51, 52 and a rotation direction switching circuit 5.
3, a reel control circuit 54, and a reel drive circuit 55, 56, and the still image information generation circuit 7 includes an AD conversion circuit 71.
, a frame memory 72 , a DA conversion circuit 73 , a read timing generation circuit 74 , a successive output control circuit 75 , a write timing generation circuit 76 , and a write control circuit 77 .

FIG. 2 shows an example of the recording pattern of the magnetic tape 1 in the first embodiment.

In FIG. 2(a), 1 is a magnetic tape, 10a is a track on which one continuous field of video signal is recorded, 1
0b is a track where tape position information is recorded with a positive azimuth angle, 10C is a track where still image information is recorded with a negative azimuth angle, and 10d has the same inclination as the azimuth angle of track 10b. The head gap of the fixed helad 111, 10e is the bed gap of the fixed helad 112 having the same inclination as the azimuth angle of the track 10c, and the frame memory 72 from A1 to A22 is
These are the consecutive addresses of data written to.

In FIG. 2(b), 1 is a magnetic tape, 10f is a track on which one continuous field of video signal is recorded, 1
0g is a track where tape position information is recorded with a positive azimuth angle, 10h is a track where still image information is recorded with a negative azimuth angle, and 101 is a track with the same inclination as the azimuth angle of track 10g. A helad gap 10j of the fixed head 111 is a helad gap of the fixed head 112 having the same inclination as the azimuth angle of the track 10h.

FIG. 3 is a signal waveform diagram showing an example of the operation of the still image information generation circuit 7 in the first embodiment.

In FIG. 3, 9a is a rotational phase signal that is the output of the rotational phase detector 9, 74a is a read timing signal that is the output of the successive timing generation circuit 74, and 75a is an output from the readout control circuit 75 to the D/A conversion circuit 73. A read clock signal 75b is output from the control circuit 75 to the frame memory 7.
75C is the final read timing signal outputted from the read control circuit 75 to the write timing generation circuit 76; 70 is the input video signal in units of one field; 76a is the input video signal of the write timing generation circuit 76; The output write timing signal 77a is a write clock signal output from the write control circuit 77 to the AD conversion circuit 71, 77b
is a write address signal output from the write control circuit 77 to the frame memory 72.

The mutual relationship and operation of each of the above components will be explained.

First, the recording operation will be explained. State switching circuit 1 during recording
3, the low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 operate. Low speed transfer means 4
Then, the capstan control circuit 43 brings the pinch roller 42 and the capstan 41 into close contact with each other and rotates the capstan 41 at a constant speed, thereby transporting the magnetic tape 1 at the recording speed. Further, the helical driving means 3 always causes the magnetic head 2 al 2 b to helically scan the magnetic tape 1 .

The tape position information, which is the output of the address generation circuit 6, is transferred to the track 10 by the magnetic spatula F2a at the timing of the first switching signal 8a synchronized with the rotational phase signal 9a.
b is recorded. In addition, the still image information generation circuit 7
Still image information, which is the output of the magnetic head 2b, is recorded by forming a track 10c at the timing of the second switching signal 8b synchronized with the rotational phase signal 9a. Here, the operation of the still image information generation circuit 7 will be explained. State switching circuit 13
is outputting a signal indicating the time of recording, and when the rotational phase signal 9a rises to a high level when the magnetic head 2b comes to the recording start position of the track 10c, the read timing generation circuit 74 creates a non-recorded section. After the time has elapsed, the read timing signal 74a is output at a high level for the time required for recording on the track 10c. The read control circuit 75 outputs a read clock signal 75a and a read clock signal 75a when the read timing signal 74a is at a high level.
A read address signal 75b that changes in synchronization with is output. As shown in the recording arrangement in FIG. 2(a), the read address increases from address A12 to A22 to form one track, and then changes to address A1 in the next track.
to All. Therefore, the data in the frame memory 72 is read out sequentially, and the data in the DA conversion circuit 73 is read out sequentially.
A recording signal is created by. In this way, an intermittent recording signal is created every time the rotational phase signal 9a becomes high level, and at the time of the last DA conversion of one frame, the readout control circuit 7
5 outputs a final read timing signal 75c. The write timing generation circuit 76 receives the final successive timing signal 75c.
In response to this, the write timing signal 76 becomes a low level for a period of one frame from the vertical synchronization signal of the input video signal.
Output a. The write control circuit 77 outputs a write clock signal 77a and a write address signal 77b which increases in synchronization with the write clock signal 77a when the write timing signal 76a is at the 1X level. Therefore, the A/D converted data is sequentially written into the frame memory 72. In this way, the still image information generation circuit 7 converts the input video signal into 1
An intermittent still image video signal is read frame by frame and recorded on the track 10c.

Next, the high-speed transfer operation will be explained. During high-speed transfer, the output of the state switching circuit 13 causes the low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 to stop operating, and the high-speed transfer means 5 to operate.

When the rotational direction switching circuit 53 is outputting a command in the rewinding direction, the reel control circuit 54 outputs a command for high-speed driving to the reel drive circuit 56, and outputs a stop command to the reel drive circuit 55. That is, since the reel 51 does not generate rotational torque, and the reel 52 generates rotational torque for high-speed driving, the magnetic tape 1 is rewound at high speed.

When the transport speed of the magnetic tape 1 becomes approximately equal to the track formation speed during recording, the transfer speed of reproduction signals from the fixed heads 111 and 112 becomes approximately equal to that during recording. At this time, tape position information is reproduced from the fixed head 111 and still image information is reproduced from the fixed head 112 due to the azimuth effect brought about by the inclination of the head gaps 10d and 10e. In particular, for still image information, the transfer speed of the reproduced signal is the same as that during recording, and the addresses A1 to A2 in FIG. 2(a) are
2 will be played back in order, so it will be played back in the order written to the frame memory 72. In other words,
The decoding circuit 12 outputs tape position data and a still image video signal for each frame by simply performing simple waveform shaping and the like without performing time axis conversion. This tape position data enables high-speed retrieval of a desired tape position, and by displaying still images on a monitor television, high-speed retrieval is possible while checking recorded contents.

Furthermore, the case of the recording pattern shown in FIG. 2(b) will be explained. During recording, the rotational phase signal 9a in FIG.
At the same time as rises to high level, the read timing signal 74a is set to high level, and the successive timing signal 74a is set to high level.
By shortening the time when a is at a high level, there is no unrecorded area during one scanning period of the magnetic head 2 al 2 b, and the track 10 f and the tracks Log and 10 h are continuous.
Track 1 whose length is shorter than the recording pattern in FIG. 2(a)
0g, 10h are formed. During high-speed driving, bed gap 101 (or 10j) allows track 1 to
Information of 0g (or 10h) is reproduced intermittently. In the case of tape position information, the decoding circuit 12 selects track 10f.
The tape position data can be easily extracted by truncating the playback information.

In addition, in the case of still image information, the decoding circuit 12
A still image video signal can be extracted by truncating the reproduction information of 0f, writing it intermittently to the image memory, and then reading it out continuously. This tape position data enables high-speed retrieval of a desired tape position, and by displaying still images on a monitor television, high-speed retrieval is possible while checking recorded contents. In this way, there is no need to provide a non-recorded area between the track 10f and the tracks fog, 10h, and the area occupied by the tracks 10g, 10h is small, so the recording area of the magnetic tape 1 can be used effectively. .

Next, an embodiment of the second invention will be described with reference to the drawings.

FIG. 4 shows a block diagram of a tape-shaped medium recording and reproducing apparatus according to an embodiment of the second invention (hereinafter abbreviated as the second embodiment).

In FIG. 4, the same parts as in FIG. 1 are given the same reference numerals, and explanations thereof will be omitted. 14 is a magnetic head 2a (or 2b)
track 10b of magnetic tape 1.

A head fixing means 141 is inserted into a position fixing hole provided in the drum 31 to fix the magnetic head 2a (or 2b) at the track 10b or 10e of the magnetic tape 1. 142 is a magnet attached to the fixed bin 141), 143 is a coil whose midpoint is grounded, and 144 is a coil that stops the rotation of the drum 31 according to an operation command.
a switch for supplying power to either terminal of the
45 is a resistor for limiting the current flowing through the coil 143, 121 is a decoding circuit that creates tape position data or still image video signals from the reproduction signals of the magnetic heads 2a and 2b, and 131 is a helical drive means 3 and a low speed during recording. This is a state switching circuit that operates the transfer means 4, the address generation circuit 6, and the still image information generation circuit 7, and operates the head fixing means 14 and the high-speed transfer means 5 during high-speed transfer.

The mutual relationship and operation of each of the above components will be explained.

During the recording operation, the helical drive means 3, low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 operate according to the output of the state switching circuit 131, and the same operations as in the first embodiment are performed, so the description will be given below. omitted.

Next, the high-speed transfer operation will be explained. During high-speed transfer, the output of the state switching circuit 131 causes the helical drive means 3, low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 to stop operating, and the head fixing means 14 and high-speed transfer means 5 to operate. do.

In the head fixing means 14, when the output of the state switching circuit 131 changes from a recording command to a high-speed transfer command, a switch 144 switches the coil 143 so that the forces caused by the magnetic fields of the coil 143 and the magnetic fields of the magnet 142 change from the direction of mutual attraction to the direction of repulsion. Switch the current flowing to the Due to this repulsive force, the fixed bottle 141 is inserted into the position fixing hole of the rotating drum 31, and the rotation of the drum 31 is stopped. By stopping the drum 31, the magnetic head 2a (or 2b) is fixed at a position corresponding to tracks 10b and 10c in FIG. 2(a). Here, when the rotation direction switching circuit 53 is outputting a command in the rewinding direction, the reel control circuit 54 outputs a command for high-speed driving to the reel drive circuit 56, and outputs a stop command to the reel drive circuit 55. do. That is, since the reel 51 does not generate rotational torque, and the reel 52 generates rotational torque for high-speed driving, the magnetic tape is rewound at high speed. When the transport speed of the magnetic tape 1 becomes approximately equal to the track formation speed during recording, the transfer speed of the reproduced signal from the magnetic head 2a (or 2b) becomes approximately equal to that during recording. At this time, tape position information is reproduced from the magnetic head 2a (or still image information is reproduced from the magnetic head 2b) due to the azimuth effect brought about by the inclination of the magnetic head 2a (or 2b). In particular, still image information is written to the frame memory 72 because the transfer speed of the reproduced signal is the same as that during recording, and in the case of the recording pattern shown in FIG. They will be played in the order they were received. In other words, the decoding circuit 12 outputs tape position data and a still image video signal for each frame by simply performing simple waveform shaping and the like without performing time axis conversion. This tape position data enables high-speed retrieval of a desired tape position, and by displaying still images on a monitor television, high-speed retrieval is possible while checking recorded contents.

Next, an embodiment of the third invention will be described with reference to the drawings.

FIG. 5 shows a block diagram of a tape-shaped medium recording and reproducing apparatus according to an embodiment of the third invention (hereinafter abbreviated as the third embodiment).

In FIG. 5, the same parts as in FIG. 1 are given the same reference numerals, and their explanation will be omitted. 15a and 15b are playback heads with azimuth for playing back tape position information (or still image information); 16 is tape position information (or still image information);
relative movement means for moving the reproducing heads 15a, 15b in the longitudinal direction of the magnetic tape 1 on tracks and tracks on which the magnetic tape 1 and the reproducing heads 15a, 15b are recorded, and maintaining the relative speed of the magnetic tape 1 and the reproducing heads 15a, 15b at the track forming speed during recording; 161 is magnetic tape 1
A roller 162 that rotates without slipping in contact with the playback heads 15a and 15b is attached at an angle of 180 degrees, and one of the playback heads 15a or 15b is always used to record tape position information (or still image information). 163 is a rotational speed detector that outputs a voltage proportional to the rotational speed of the roller 161;
4 is a rotational speed detector that outputs a voltage proportional to the rotational speed of the drum 162, and 165 is a voltage that corresponds to the output of the rotational speed detector 164 when the reproducing heads 15a, 15b rotate at the track forming speed during recording. Rotation speed detector 1
Target value circuit that outputs a voltage obtained by subtracting the output voltage of 63, 1
66 indicates that the output voltage of the rotational speed detector 164 is the target value circuit 1.
A speed control circuit 167 controls the rotational speed of the drum 162 so that the output voltage becomes an output voltage of 65, and a speed control circuit 167 outputs a rotational phase signal for the period in which the reproduction rads 15a and 15b scan the recording track in synchronization with the rotation of the drum 162. This is a rotational phase detector.

FIG. 6 is an example of a block diagram showing the inside of the decoding circuit 122 in the third embodiment.

In FIG. 6, 165a is the rotational phase signal output from the rotational phase circuit 167, 150a is the reproducing head 15a,
The reproduction head signal 1221 is the output of the reproduction head 15a (or 15b) which scans the recording track.
A write timing generation circuit 1222 that outputs a high-level signal after a certain period of time has elapsed from the switching of b) until the next switching of the reproducing head 15b (or 15a).
1223 is an A/D conversion circuit for converting the reproduction head signal 150a into digital information while the output signal of the write timing generation circuit 1221 is at a high level, and 1223 is for storing the digital information obtained by the A/D conversion circuit 1222. Note IJ, 1224 is the playback head signal 150a
A write control circuit 1225 outputs a write clock signal and a write address signal for digitizing the data in the A/D conversion circuit 1222 and a write address signal for the memory 1223.
D/ for converting digital information into analog signals
The A conversion circuit 1226 is a continuous output control circuit that outputs a read clock signal for converting digital information in the memory 1223 into an analog signal by the D/A conversion circuit 1225 and a continuous address signal for the memory 1223.

FIG. 7 shows a reproduction head 15a+15 in the third embodiment.
FIG. 3 is a scan timing chart showing the scan time and scan range of FIG.

In FIG. 7, Ll is the distance that the reproducing head 15a or 15b scans over the magnetic tape 1 when the magnetic tape 1 is stopped, and the reproducing head 15a,
15b is the length of the rotating arc in contact with the magnetic tape 1, and is the distance on the magnetic tape 1 where the reproduced information overlaps, and L2 is the length of the rotating arc that is in contact with the magnetic tape 1, and L2 is the length of the rotating arc that is in contact with the magnetic tape 1, and L2 is the distance on the magnetic tape 1 where the information reproduced is newer than the information reproduced immediately before. T1 is the distance on the magnetic tape 1 of information and the distance the magnetic tape 1 is transported during the scanning period of the reproducing head 15a or 15b, and T1 is the distance L1 on the magnetic tape 1 when the reproducing head 15a or 15b is
, T2 is the time for the reproducing head 15a or 15b to scan the distance L2 on the magnetic tape 1, and Ys indicates the position on the magnetic tape 1 where the magnetic tape 1 begins to contact the drum 162. A straight line, Ye is a straight line indicating the position on the magnetic tape 1 where the magnetic tape 1 ends contacting the drum 162, and Xh is a straight line indicating the playback head 15a, 15b.
is a vector indicating the direction in which .

The mutual relationship and operation of each of the above components will be explained.

During the recording operation, the low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 operate according to the output of the state switching circuit 13, and the same operations as in the first embodiment are performed, so a description thereof will be omitted.

Next, the high-speed transfer operation will be explained. During high-speed transfer, the output of the state switching circuit 13 causes the low-speed transfer means 4, address generation circuit 6, and still image information generation circuit 7 to stop operating, and the high-speed transfer means 5 to operate.

When the rotation direction switching circuit 53 is outputting a command in the rewinding direction, the reel control circuit S4 outputs a command for high-speed driving to the reel drive circuit 56, and outputs a stop command to the reel drive circuit 55. In other words, the reel 51 generates rotational torque, and the reel 52 rotates 1-
Because of the generated torque, the magnetic tape 1 is rewound at high speed. When the magnetic tape 1 is rewound, the roller 161 contacts the magnetic tape 1 and rotates without slipping, and the rotation speed detector 1
63 outputs the rotational speed of the roller 161 as a voltage value. The target value circuit 165 outputs a target value of the output voltage of the rotational speed detector 164 based on the output voltage value of the roller 161. The speed control circuit 166 rotates the drum 162 so that the output voltage of the rotation speed detector 164 becomes equal to the output voltage of the target value circuit 165.

The reason why the relative speed between the reproducing heads 15a, 15b and the magnetic tape 1 becomes constant through the operations up to this point will be explained in more detail. The rewinding speed of the magnetic tape 1 is Vt (m/5e
c), playback head 15a.

The rotational movement speed of the magnetic tape 15b is Vh (m/5ec), and the target relative speed between the magnetic tape 1 and the reproducing heads 15a and 15b is Vo.
(m/5ee), the rotational speed of the drum 162 may be controlled so that Vh=Vo-Vt. Specifically, the output voltage of the rotational speed detector 163 is Et
(V), the output voltage of the rotational speed detector 164 is Eh (V)
, when the voltage corresponding to the target relative speed between the magnetic tape 1 and the reproducing heads 15a and 15b is Eo (V), and the speed/voltage conversion coefficient is k (Vasec/m), Et=kXVt Eh=kXVh Eo=kXV.

It can be seen that if the relationship is set as follows, the rotational speed of the drum 162 may be controlled by the speed control circuit 166 so that Eh=Eo-Et. In this way, the magnetic tape 1 and the reproducing head 15a.

The reproducing heads 15a, L keep the relative speed of the reproducing heads 15b constant.
The signal reproduced from 5b is decoded by a decoding circuit 122 to enable high-speed retrieval at any transfer speed.

Here, the operation of the decoding circuit 122 will be explained in more detail. As shown in FIG. 7, playback heads 15a and 15b
The range on the magnetic tape 1 that is played back is the playback head 15.
It changes as shown by diagonal lines every time a (or 15b) is scanned. The period T1 in which the playback head 15b (or 15a) starts playback and advances the distance L1 is the previous playback head 15a (
Or, since the same data as the data reproduced by step 15b) is reproduced, it is truncated. The data reproduced during the subsequent period T2 of distance jilIL2 is stored in the memo 1J1223. The same process is applied to the data to be reproduced by the RAD 15a (or 15b) for the next reproduction, and the memory 12
23 to be memorized. By continuously reading the data stored intermittently in the memory 1223, continuous tape position data or still image video signals can be obtained.

The operation of the decoding circuit 122 will be explained based on FIG. The write timing generation circuit 1221 generates a rotational phase signal 165a indicating the scanning start point of the reproducing head 15a or 15b.
A high-level signal is output from the timing when time T1 has elapsed since the switching timing of 165a until the next switching timing of the rotational phase signal 165a (duration corresponding to time T2). Here, the target relative speed between the magnetic tape 1 and the playback heads 15a and 15b is Vo (m/s e C), the rotational diameter of the playback heads 15a and 15b is d (m), and the circumference is π.
Then, it is given by T1= (πXd)/(2XVo). Next, while the output of the write timing generation circuit 1221 is at a high level, the write control circuit 1224 generates a write clock signal for digitizing the reproduction head signal 150a in the AD conversion circuit 1222 and a write clock signal for the memory 1223.
Outputs the write address signal. Therefore, distance L2
The reproduction head signal 150a during scanning is subjected to AD conversion by an AD conversion circuit 1222 and stored in a memory 1223.

In subsequent scans, the contents of the memory 1223 are sequentially added in the same manner. On the other hand, the contents stored in the memory 1223 are continuously subjected to DA conversion by the DA conversion circuit 1225 by the continuation control circuit 1226. Here, the playback heads 15a, 15
If the playback information in b is tape position information, it becomes possible to continuously recognize the tape position, and if the playback information is still image information, it is possible to continuously obtain a video signal in units of one frame. Become. In other words, in either case, recorded information can be reproduced at any transfer speed, so high-speed retrieval is possible at any transfer speed.

As described above, in the first embodiment, the fixed heads 111 and 112 reproduce tape position information and still image video information recorded on the tracks 10b and 10c by the magnetic heads 2a and 2b, and the decoding circuit 12 Performs decryption operation. Further, in the second embodiment, the magnetic head 2a
The tape position information and still image video information recorded in the positions of tracks 10b and 10c by F2 and 2b are fixed to the positions of tracks 10b and 10c.
a and 2b, and a decoding circuit 121 performs a decoding operation.

Further, in the third embodiment, the tape position information and still image video information recorded at the positions of tracks 10b and 10c by the magnetic heads 2a and 2b are transferred to the playback head 15.
A and 15b reproduce the data at an arbitrary transfer speed while keeping the relative speed constant, and a decoding circuit 122 performs a decoding operation.

In the embodiment, a tape running device using the magnetic tape 1 is shown, but the effects of the invention will not change even if a tape capable of recording and reproducing by, for example, light is used.

Further, in the embodiment, an example was shown in which the direction of high-speed transport is rewound with respect to the running direction during recording, but the scanning direction of the magnetic heads 2a, 2b on the magnetic tape 1 may be reversed, or the track 10b, By inverting the output time axis of the reproduced signal of 10c using a memory or the like, it is possible to decode the recorded information even during fast forwarding, and the effect of the invention remains unchanged.

Further, in the first embodiment, the fixed head 111°112
has newly installed a head post 11 for a fixed head,
The fixed head 111, 112 may be fixed at a position where the fixed heads 111, 112 contact the tracks 10b, 10c, such as by being attached in common with a conventional post or attached to a non-rotating part of the drum 31, and is not limited to the embodiment.

Further, in the second embodiment, the head fixing means 14 was realized by inserting the fixing pin 141 into the hole for fixing the position of the drum 31, but a rotational position detector was also provided to control the position of the drum. It is conceivable to move the rotation stop position of the drum to a predetermined position using electromagnetic force itself, and the present invention is not limited to this embodiment.

Further, in the second embodiment, reproduction was performed using one magnetic head, but a plurality of types of data can be reproduced by using a combination head with both azimuths or by switching the magnetic heads fixed at the positions of the tracks 10b and 10c.

Furthermore, in the third embodiment, the rotational speed of the roller wound around the tape was used as tape speed information to detect the tape speed, but this could also be achieved by using the period, frequency, etc. of the control signal recorded on the tape. However, the present invention is not limited to examples.

Further, in the third embodiment, the relative movement means 16 has a configuration in which the magnetic tape 1 is wound around the rotating drum 162 and the reproducing heads 15a, 15b are mounted on the rotating drum 162. The mounting may be in contact with the magnetic tape 1, and is not limited to the embodiment.

Effects of the Invention As described above, the first invention includes at least one head for recording and reproducing information close to a tape-shaped medium, and the head scans diagonally with respect to the longitudinal direction of the tape-shaped medium. a helical drive means, a low-speed transport means for transporting the tape-shaped medium at a recording speed, a high-speed transport means for transporting the tape-form medium at a higher speed than during recording, and a predetermined area for recording on a part of the track. a predetermined information generating means for supplying information to the head; at least one fixed head for reproducing predetermined information recorded in a partial area of a track; and a decoding means for decoding an output signal of the fixed head; By providing a state switching means that operates the low-speed transfer means and the predetermined information generation means during recording and operates the high-speed transfer means during high-speed transfer, there is no need to record information for high-speed retrieval again. Since the recorded signal can be reproduced by running the tape-like medium at a higher speed than the conventional reproduction speed, it is possible to perform a high-speed search while checking the recorded contents, and the implementation effect is large.

Further, as a second invention, at least one head for recording and reproducing information in close proximity to the tape-shaped medium; and a helical drive means for scanning the head obliquely with respect to the longitudinal direction of the tape-shaped medium; head fixing means for fixing the head at a predetermined position on the tape-like medium; low-speed transport means for transporting the tape-like medium at a recording speed; high-speed transport means for transporting the tape-like medium at a higher speed than during recording; predetermined information generation means for supplying predetermined information to the head for recording on a part of the track; decoding means for decoding the output signal of the head; during recording, the helical drive means and the low-speed transport means; By providing a state switching means that operates the predetermined information generating means and operates the head fixing means and the high-speed transfer means during high-speed transfer, information for high-speed retrieval can be rerecorded or new information can be recorded outside the drum. There is no need to install a playback head.Since the recorded signal can be played back by running the tape-shaped medium at a higher speed than conventional playback speeds, it is possible to perform high-speed searches while checking the recorded contents, and the implementation effect is large. .

Further, as a third invention, there is provided a head for recording and reproducing information in close proximity to the tape-shaped medium, and a helical drive for scanning the head diagonally with respect to the longitudinal direction of the tape-shaped medium. means, low-speed transport means for transporting the tape-shaped medium at a recording speed, high-speed transport means for transporting the tape-form medium at a higher speed than during recording, and predetermined information for recording on a part of the track. a predetermined information generating means for supplying the predetermined information to the head; at least one reproducing head for reproducing predetermined information recorded in a partial area of the track; relative movement means for moving the reproducing head in a direction and keeping the relative speed of the tape-shaped medium and the reproducing head constant; decoding means for decoding the output signal of the fixed head; and during recording, the low-speed transport means and the By providing a state switching means that operates a predetermined information generation means and operates the high-speed transfer means during high-speed transfer, there is no need to newly record information for high-speed retrieval (at a speed higher than that which can be reproduced in the past). Since the recorded signal can be played back by running the tape-like medium at an arbitrary speed, it is possible to perform a high-speed search while checking the recorded contents, and the implementation effect is significant.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a tape-shaped medium recording and reproducing apparatus in a first embodiment of the present invention, FIG. 2 is a recording pattern diagram of a magnetic tape 1 in the first embodiment, and FIG. FIG. 4 is a signal waveform diagram showing an example of the operation of the still image information generating circuit 7 in the second embodiment of the present invention, FIG. FIG. 6 is a block diagram showing the configuration of a tape-shaped medium recording and reproducing apparatus according to a third embodiment of the present invention.
FIG. 7 is a block diagram showing the internal configuration of the decoding circuit 122 in the third embodiment.
8 is an explanatory diagram illustrating the locus of the magnetic head on the magnetic tape. FIG. 9 is a piezoelectric element of a conventional tape-shaped medium recording/reproducing device. FIG. 2a, 2b...magnetic head (head), 3...
Helical drive means, 4...low speed transfer means, 5
...high-speed transfer means, 6...address generation circuit (
7... still image information generation circuit (predetermined information generation means), 111, 112... fixed head, 12.121... decoding circuit (decoding means),
13゜131...state switching circuit (state switching means)
, 14...head fixing means, 15a, 15b...
- Reproduction head, 16...relative movement means. ■ Self c-3-〇th 31st H! −−−Hat↑Mishu, − − − 1
-Figure 7 Breast 1 Helide If Bl, I
r > Irb.

Claims (9)

[Claims] (1) A device for recording and reproducing information by forming diagonal tracks on a tape-shaped medium, the apparatus comprising: at least one head for recording and reproducing information in close proximity to the tape-shaped medium; and the head is connected to the tape. a helical drive means that scans diagonally with respect to the longitudinal direction of the tape-like medium; a low-speed transport means that transports the tape-like medium at a recording speed; a high-speed transport means that transports the tape-like medium at a higher speed than during recording; a predetermined information generating means for supplying the head with predetermined information to be recorded on a partial area of the track; at least one fixed head for reproducing the predetermined information recorded on the partial area of the track; A tape-shaped tape comprising: decoding means for decoding the output signal of the fixed head; and state switching means for operating the low-speed transfer means and the predetermined information generation means during recording, and for operating the high-speed transfer means during high-speed transfer. Media recording and reproducing device. (2) A device for recording and reproducing information by forming diagonal tracks on a tape-shaped medium, the apparatus comprising: at least one head for recording and reproducing information in close proximity to the tape-shaped medium; and the head is connected to the tape. a helical drive unit that scans diagonally with respect to the longitudinal direction of the tape-shaped medium; a head fixing unit that fixes the head at a predetermined position on the tape-shaped medium; and a low-speed transport unit that moves the tape-shaped medium at a recording speed. a high-speed transport means for transporting the tape-shaped medium at a higher speed than during recording; a predetermined information generating means for supplying the head with predetermined information to be recorded on a partial area of the track; and a predetermined information generating means for decoding the output signal of the head. and a state switching means that operates the helical drive means, the low-speed transfer means, and the predetermined information generation means during recording, and operates the head fixing means and the high-speed transfer means during high-speed transfer. tape-like media recording and reproducing device. (3) The tape-shaped medium recording and reproducing apparatus according to claim 1 or 2, wherein the high-speed transporting means is set to a transporting speed such that the reproduction signal speed of the fixed head matches the recording signal speed of the head. (4) The tape-shaped medium recording/reproducing apparatus according to claim 2, wherein the plurality of heads are attached to the helical drive means adjacently with different azimuths. (5) A device for recording and reproducing information by forming diagonal tracks on a tape-shaped medium, the apparatus comprising: at least one head for recording and reproducing information in close proximity to the tape-shaped medium; a helical drive means that scans diagonally with respect to the longitudinal direction of the tape-like medium; a low-speed transport means that transports the tape-like medium at a recording speed; a high-speed transport means that transports the tape-like medium at a higher speed than during recording; a predetermined information generating means for supplying the head with predetermined information to be recorded on a partial area of the track; at least one reproducing head for reproducing the predetermined information recorded on the partial area of the track; relative movement means for moving the reproducing head in the longitudinal direction of the tape-shaped medium over a partial area of the track and keeping a relative speed between the tape-shaped medium and the reproducing head constant; and an output signal of the fixed head. A tape-shaped medium recording and reproducing device comprising: decoding means for decoding; and state switching means for operating the low-speed transfer means and the predetermined information generation means during recording, and operating the high-speed transfer means during high-speed transfer. (6) The tape-shaped medium recording and reproducing apparatus according to claim 1, 2, or 5, wherein the predetermined information generating means outputs recording position information of the tape-shaped medium. (7) The tape-shaped medium recording and reproducing apparatus according to claim 1, 2 or 5, wherein the predetermined information generating means divides one field or one frame of video data and sequentially outputs the divided video data. (8) Claims 1 and 2, wherein the predetermined information generating means outputs the predetermined information at time intervals such that multiple predetermined information recording portions do not occur in the azimuth direction on the same azimuth track.
Or the tape-shaped medium recording and reproducing apparatus according to claim 5. (9) The predetermined information generating means outputs the predetermined information at time intervals in which a plurality of predetermined information recording portions do not occur in the azimuth direction on the same azimuth track, and outputs no signal before or after outputting the predetermined information. 1. A tape-shaped medium recording and reproducing apparatus according to claim 2 or claim 5.