JPH02206014A - Rotary head type recorder - Google Patents

Abstract

PURPOSE:To systematically handle video, sounds, and data by using a mechanism of digital VTR having a mobile element for displacement of the trace position and using the same head as video recording to reproduce and confirm computer data at the time of recording of this data and displacing the trace position to use it for reproducing. CONSTITUTION:Heads 11A and 11B are used for recording as well as reproducing and have opposite azimuths. When this device is used for a digital VTR, heads 11A and 11B are switched at intervals of a half rotation of heads by a switch 12 and a recording signal is alternately given to them, and heads are alternately used to detect a reproduced signal at the time of reproducing. When this device is used for a recorder, the tape speed is reduced to a half, and both heads reproduce data recorded in the preceding rotation after recording data, and a track pattern is alternately recorded by two heads. Each head is attached to a piezoelectric element 14, and the element 14 determines the trace position of each head by the voltage of a controller 13. Since the tape speed is a half of that for video recording and reproducing, the recording density is not reduced. By this constitution, the device is used for the digital VTR as well as the data recorder.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a rotary head type recording device that records digital signals such as data, video, audio, etc. onto a tape using a rotary head.

BACKGROUND OF THE INVENTION Conventionally, there has been no device that uniformly records data, video, and audio as digital signals using a rotating head. Here is a data recorder that uses the DAT (Digital Audio Recorder) mechanism.

FIG. 7 shows a schematic diagram of this conventional rotary head type recording device, in which 1 is a rotating drum, 2A and 2B are recording heads, 3A and 3B are reproduction heads, 4 is a recording signal generator, and 5 is a reproduced signal detector.

In the conventional rotary head recording apparatus configured as described above, each head is fixed on a rotary tram. The recording signal generator 4 is connected to the recording heads 2A and 2B.
Even during the recording period, the reproduction signal detector 5 detects reproduction signals from the reproduction heads 3A and 3B.

The track pattern on the tape at this time is shown in FIG.

As the tape moves, the recording heads 2A and 2B alternately record recording data on the tape. Playback spatula F' 3 A and 3B are mounted on a rotating drum, and their mounting positions are shifted vertically from 2A and 2B. On the tape, the data recorded by 2A is immediately checked for playback by 3A. Immediately thereafter, the data recorded by 2B is confirmed to be reproduced by 3B. Originally, DAT does not check playback when recording signals, but when using this mechanism to record and save data in computers, etc., it is necessary to check playback at the same time as recording to ensure data integrity. becomes.

As described above, as a conventional example, a method has been used in which a rotating drum for recording audio signals is modified to create a data recorder.

Problems to be Solved by the Invention However, in the above configuration, a new reproducing head is added in order to ensure reliability as a data recorder, so the configuration of the rotating drum becomes complicated. Even if a digital recording VTR is used as a data recorder, there is a problem in that it is difficult to handle video, audio, and computer data in a unified manner if the same method is used.

In view of the above, an object of the present invention is to provide a rotary head recording device that secures reliability as a data recorder without complicating the structure of the rotary drum and handles video, audio, and data in an integrated manner. .

Means for Solving the Problems The present invention has a recording/reproducing head on a rotating drum, a movable element on the rotating drum for displacing the position where the recording/reproducing head traces on a recording medium, and a series of and a control unit that controls the displacement position of the head and switching between recording and reproduction so that a period in which the head is used for recording and a period in which the immediately previously recorded data is reproduced occur alternately during the data recording period. It is a rotating head type recording device characterized by a plurality of recording and reproducing heads on a rotating drum, and a movable element for displacing the position at which at least one or more recording and reproducing heads trace the recording medium. is provided on a rotating drum, and all of the plurality of recording and reproducing heads are used for recording during a series of recording periods, and at least one of the plurality of recording and reproducing heads is used for recording during a series of recording periods. The rotary head type recording apparatus is characterized by having a mode used for reproducing data recorded in the rotary head, and a control section for controlling mode switching and the displacement position of the head.

Effect of the present invention With the above-described configuration, the present invention provides a digital V having a movable element for displacing the tracing position of the head.
For the playback confirmation operation necessary when recording computer data or the like using the TR mechanism, the same head used for video recording is used, and its trace position is displaced and used for playback. Therefore, unified handling of video, audio, and data becomes possible.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic diagram of a rotary head type recording apparatus in a first embodiment of the present invention. In Figure 1, 1
0 is a rotating drum, IIA and IIB are recording and reproducing heads,
12' is a recording/reproducing signal switcher, 13 is a head displacement controller, and 14A and 14B are piezoelectric elements.

The operation of the rotary head type recording apparatus of this embodiment configured as described above will be explained below. Head IIA, I
The IBs are used for both recording and reproduction, and their azimuths are opposite to each other. When this device is used as a digital VTR, both heads are used for recording video signals. That is, the recording signal is alternately applied to the heads IIA and IIB by the recording/reproducing signal switch 12 every half rotation of the head. The track pattern recorded on the tape at this time is such that data is recorded alternately by both heads as shown in FIG. When reproducing a video signal, the heads IIA and IIB are used alternately to detect the reproduced signal.

On the other hand, when this device is used as a data recorder, the tape feed speed is half that of a digital VTR. After heads IIA and 11B have recorded data, both heads enter the playback state, and head IIA and 11B record data.
IA reproduces the data recorded by head IIA one rotation before the F' plum, and head IIB reproduces the data recorded by head 11B one rotation before the drum. FIG. 3 is a diagram showing the order of the heads used at this time. The track pattern recorded at this time is in the form of alternate recording by two heads, similar to the case of video signals.

Here, the heads IIA and IIB are attached to piezoelectric elements 14A and 14B, respectively, which are fixed to a rotating drum, and the voltage applied to each piezoelectric element is controlled by a head displacement controller 13. The head displacement controller 13 controls the voltage applied to the piezoelectric element for positioning as described above. The displacement of the piezoelectric element then determines the trace position of each head. At this time, the signals to both heads are switched every time the drum makes a half rotation, and recording and reproduction are switched every time the drum makes one rotation. The recording/reproducing signal switch 12 performs this signal switching. Since the tape feed speed is exactly half that of video signal recording and playback, the recording density does not decrease even if recording and playback are performed alternately. This is head displacement control that is exactly equivalent to the 1/2 speed slow speed in a digital VTR.

Data recorders require real-time playback confirmation of data recorded in this way, and if an irrecoverable error is detected in the data that has been confirmed to be played back, the same portion of data is rewritten. . In the case of a data recorder, unlike video and audio signals, the recording rate does not have to be constant.As described above, according to this embodiment, recording is performed by displacing the trace position each time the same head rotates once. By performing reproduction alternately, it is possible to realize dual use as a digital VTR and a data recorder.

FIG. 4 is a schematic diagram of a rotary head type recording apparatus showing a second embodiment of the present invention. In the figure, 20 is a rotating drum;
21A, 21B, 2IC, 21D are recording/reproducing heads;
22 is a recording/reproducing signal switch, 23 is a head displacement controller,
24A and 24B are piezoelectric elements. In this example, not only the arrangement of the heads is different from the first embodiment, but also the control of the heads is different.

The operation of the rotary head type recording apparatus of the second embodiment configured as described above will be explained below. head 21
A and 2IC have the same azimuth, 21B and 21D respectively.
21B and 21D have the same azimuth. Each head is used for both recording and reproduction. Heads 21A and 21B and 2IC and 21D are each integrally attached to a rotating drum via piezoelectric elements 24A and 24B, and are located 180 degrees opposite each other. When this rotary head type recording device is used as a digital VTR, all heads are used for recording during a series of recording periods. That is, while the drum rotates half a revolution, the heads 21A and 21B simultaneously record video signals on the tape.
During the next half rotation, heads 21C and 21D simultaneously record video signals on the tape. When recording video signals, the head position is not displaced using a piezoelectric element.

When the rotary head type recording device of this embodiment is used as a data recorder, the tape feed speed is half that of a digital VTR. and heads 21A, 21
After the data has been recorded by the heads 21C and 21D, the heads 21C and 21D enter the reproduction state, and trace the trunk recorded by the heads 21A and 21B immediately before to confirm reproduction. Since the above operation is repeated every time the rotating drum rotates once, in this case, even during a series of recording periods, the heads 21A and 21B are used only for recording, and the heads 21C and 21D are used only for playback confirmation, with -10=. The track pattern on the tape at this time is shown in FIG. Further, the order of the heads used in this case is shown in FIG. If the result of data reproduction confirmation is that an irrecoverable error exists, the corresponding data is rewritten.

When used as a data recorder in this way, during a series of recording periods, the recording/reproducing signal switching record 22 is connected so that the recording signal is always applied to the heads 21A, 21B, and the reproduction signal is always obtained from the heads 2IC, 21D. . The head displacement controller 23 also includes heads 21C and 2 for playback confirmation.
The piezoelectric elements 24A, 1D trace and reproduce data recorded immediately before by the heads 21A, 21B.
A voltage is applied to 24B to control the displacement position of the head.

The head position and tape feed control at this time are controlled by digital V.
This is similar to TR's 172 slow playback.

As described above, this embodiment uses an integrated head with a composite azimuth, and uses one of the two pairs of heads for playback confirmation, thereby ensuring reliability as a data recorder and at the same time ensuring the reliability of the digital 1l- It can be used as both a VTR and a data recorder.

As described in detail, according to the present invention, data, video, and audio can be handled in a unified manner, and data reproduction confirmation can be realized using the same mechanism as a digital VTR, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a rotary head type recording device according to a first embodiment of the present invention, FIG. 2 is a tape pattern diagram of the same embodiment, and FIG. 3 is a head switching sequence diagram of the same embodiment. 4 is a schematic diagram of a rotary head type recording device according to a second embodiment of the present invention, FIG. 5 is a tape pattern diagram of the second embodiment, and FIG. 6 is a head switching order diagram of the second embodiment. FIG. 7 is a schematic diagram of a conventional rotary head type recording device, and FIG. 8 is a diagram of a tape pattern of the conventional example. 1.10.20... Rotating drum, 2A, 2B... Recording head, 3A, 3B... Playback head, 4...
・Record signal generator, 5... Reproduction signal detector, IIA
, IIB... recording/reproducing head, 12... recording/reproducing signal switcher, 13... head displacement controller, 21A, 2
1B, 2IC. 21D... Recording/playback head, 22... Recording/playback signal switch, 23... Head displacement controller. Name of agent: Patent attorney Shigetaka Awano (a) Im

Claims (2)

[Claims] (1) A recording/reproducing head is provided on a rotating drum, and a movable element is provided on the rotating drum for displacing the position where the recording/reproducing head traces on the recording medium. A rotary head type, characterized by comprising a control unit that controls the displacement position of the head and switching between recording and reproduction so that a period in which the head is used for recording and a period in which data recorded immediately before is reproduced occur alternately. Recording device. (2) A plurality of recording/reproducing heads are provided on a rotating drum, and a movable element is provided on the rotating drum to displace the position at which at least one recording/reproducing head traces on the recording medium, and a series of recording/reproducing heads are provided on the rotating drum. A mode in which all of the plurality of recording and reproducing heads are used for recording during a period, and a mode in which at least one of the plurality of recording and reproducing heads is used to reproduce data recorded immediately before during a series of recording periods. What is claimed is: 1. A rotary head type recording device comprising a control section for controlling mode switching and a displacement position of the head.