JPH0648582Y2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a magnetic recording / reproducing apparatus represented by an R-DAT, an 8 mm video tape recorder and the like.

[Outline of device]

In the present invention, it is impossible to change the recording operation during the control signal recording operation.

[Conventional technology]

In the recently standardized R-DAT, a magnetic tape is wound around a rotating drum by about 90 degrees, and information is recorded and reproduced by a rotating head. The inclined track is roughly divided into three areas, a PCM audio signal is recorded in the central area P, and a predetermined subcode signal which is a specific control signal is recorded in areas S ₁ and S ₂ on both sides thereof. It As a subcode signal, it is required by the standard to record the start ID signal at the beginning of each program for about 9 seconds (about 600 tracks) so that the program can be searched for even at high speed. Further, it is possible to record a skip ID for skipping a signal in a predetermined section without reproducing it as a subcode signal on a predetermined track for 1 second.

[Problems to be solved by the invention]

By the way, the start ID recording time is 9 seconds and the skip ID recording time is 1 second, but if you try to execute playback, fast forward, and rewind operations by mistake during the recording operation of these control signals, However, the recording time becomes shorter than the standard value, and when the reproduction is performed based on the control signal in which the recording time becomes shorter, there is a risk of malfunction and erroneous detection.

[Means for solving problems]

In order to solve the above problems, the present invention provides a command input means (4) for outputting an operation command signal including a recording operation command signal of a specific control signal for a magnetic recording medium, and the recording operation command signal. And a control means (3) for controlling a recording operation of the specific control signal on the magnetic recording medium, the control means (3).
During the recording of the specific control signal on the magnetic recording medium, the recording of the specific control signal generated based on the reproduction command input operation, the fast-forward command input operation and the rewind command input operation in the command input means (4). A feature is that control is performed so that the stop operation is prohibited.

[Operation] According to the configuration of the present invention, the control means (3) controls the reproduction command input operation and the fast-forward command input operation in the command input means (4) during the recording of the specific control signal on the magnetic recording medium. Since the recording stop operation of the specific control signal generated based on the rewind command input operation is prohibited, a reproduction command input operation, a fast forward command input operation, and a rewind operation are performed during the recording of the specific control signal. Even if the command input operation is executed in the command input means (4), the recording of the specific control signal is not stopped, and the specific control signal is recorded in a predetermined length. Therefore, it is possible to prevent an erroneous operation and an erroneous detection at the time of reproduction due to the short recording of the specific control signal.

〔Example〕

FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus of the present invention, in which 1 is a magnetic tape, which is run by a running means 2 including a capstan, a pinch roller, a reel motor and the like (not shown). . Reference numeral 3 denotes a control means such as a microcomputer, which executes a predetermined command input from the input means 4 such as a switch and a keyboard. Reference numerals 5 and 6 are recording means and reproducing means for recording and reproducing signals on the magnetic tape 1, and include a rotary head which can be switched at the time of recording and reproducing. Reference numeral 7 is a generating means for generating a start ID signal as a cue signal, a skip ID signal as a skip signal, etc., and 8 is a detecting means for detecting the start ID signal and the skip ID signal from the reproduced signal.

However, I usually operate the input means 4 to enter the playback mode,
When instructed, the control means 3 controls the running means 2 to run the magnetic tape 1 in the forward direction at a normal speed, and causes the reproducing means 6 to reproduce the recording signal of the magnetic tape 1. While listening to the reproduced sound, the input means 4 is provided at the beginning of a predetermined program.
When the record of the start ID signal is input by operating, the control means 3 controls the generation means 7 to generate the start ID signal. This signal is supplied to the recording means 5 and recorded on the magnetic tape 1. When the start ID signal is recorded for about 9 seconds (about 600 tracks), the control means 3 controls the generating means 7 to stop the recording operation of the start ID signal.

The start ID signal is set by setting a predetermined bit in the subcode signal to logic 1.

Thus, for example, as shown in FIG. 3, at the beginning of each program, the start ID signal (A in the figure) is recorded in the subcode areas S ₁ and S ₂ of a plurality of tracks (600 tracks) for 9 seconds. .

Operate the input means 4 during this start ID signal recording operation,
Even if you enter a command to play, fast forward, or rewind,
The control means 3 does not execute this command at least until the recording operation is completed. In this case, the input during that time may be invalidated, or the input may be stored and the operation may be executed after the recording operation is completed. By doing so, it is possible to prevent the recording time of the start ID signal from being shorter than 9 seconds.

It is also possible not to accept any input from the start ID signal recording operation to the completion thereof. However, doing so may cause the user to mistakenly recognize the device as a failure. Therefore, as shown in the flow chart of FIG. 2, when a key input is made by the input means 4, it is judged whether or not the input is a stop key, that is, an input indicating stop of the magnetic recording / reproducing apparatus of the present invention. In this case, the recording operation may be stopped even before the elapse of 9 seconds, and the magnetic recording / reproducing apparatus of the present invention may be brought into a stopped state. By doing so, it is possible to prevent the recording time of the start ID signal from being less than 9 seconds carelessly, and to stop the magnetic recording / reproducing apparatus of the present invention when, for example, an emergency is required. Will be possible.

Next, when a search command is issued from the input means 4, the control means 3 controls the running means 2 to run the magnetic tape 1 at a high speed in a predetermined direction. At this time, the detection means 8 detects the start ID from the reproduction signal output from the reproduction means 6. This detection signal is output to the control means 3, and the control means 3 stops the running of the magnetic tape 1 when the number of the detection signals is counted by the number according to the command, and searches for a desired program.

The above also applies to the case where the skip ID signal (B in the figure) is recorded at a predetermined position of the program as shown in FIG. However, the recording time in this case is 1 second. Further, when the skip ID is detected during the reproduction of the recording signal, the control means 3 controls the reproduction means 6 to start the next start ID.
The playback sound is muted until is detected.

〔effect〕

As described above, according to the present invention, when recording a specific control signal (for example, a start ID signal) on a magnetic recording medium, the control means (3) controls the specific control signal for the magnetic recording medium. During recording, control is performed so as to prohibit the recording stop operation of the specific control signal generated based on the reproduction command input operation, the fast-forward command input operation and the rewind command input operation in the command input means (4). Even if a reproduction command input operation, a fast-forward command input operation and a rewind command input operation are executed in the command input means (4) during recording of a specific control signal, recording is not stopped and the control signal has a predetermined length. Will be recorded. Therefore, it is possible to prevent erroneous operation and erroneous detection during reproduction due to short recording of the control signal.

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus of the present invention, and FIG.
FIG. 3 is a flowchart thereof, and FIG. 3 is an explanatory diagram of a recording state on the magnetic tape. 1 ... magnetic tape 2 ... running means 3 ... control means 4 ... input means 5 ... recording means 6 ... reproduction means 7 ... generation means 8 ... detection means

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masafumi Tanabe 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Co., Ltd. Tokorozawa Plant (72) Yoshiki Furuta 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Co., Ltd. Tokorozawa Factory (72) Inventor Naoto Arifuku 2610 Hanazono, Tokorozawa City, Saitama Prefecture Pioneer Co., Ltd. Tokorozawa Factory (56) References: Showa 48-47311 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A command input means (4) for outputting an operation command signal including a recording operation command signal of a specific control signal for a magnetic recording medium, and the magnetic of the specific control signal based on the recording operation command signal. A magnetic recording / reproducing apparatus comprising: a control unit (3) for controlling a recording operation on a recording medium, wherein the control unit (3) is configured to store the command input unit during recording of the specific control signal on the magnetic recording medium. (4) A magnetic recording / reproducing apparatus characterized by performing control so as to prohibit the recording stop operation of the specific control signal that occurs based on the reproduction command input operation, the fast-forward command input operation, and the rewind command input operation.