JPH01303656A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To automatize the re-recording of a starting ID by detecting an original starting ID position with the operation of a key, counting the number of the FG signals of a capstan motor from the position, rewinding a tape, travelling it in the reproducing condition thereafter, and recording a new starting ID. CONSTITUTION:A capstan motor control circuit 6 is controlled by the operation of an operation key 7, while a tape 1 is returned, the peak position of additional information (starting ID) to show the peak position is retrieved, a frequency signal (FG signal) from a capstan FG4 is counted for the prescribed number only by a first counting means 12 with the position as an origin, and until then, the tape 1 is rewound, and at this time, the tape 1 is travelled in the ordinary reproducing condition. A second counting means 13 or a third counting means 14 are selected by dislocating the rerecording position of the starting ID in the forward direction or in the backward direction for the original position and when the counting of the capstan FG signal is completed, the recording of the new starting ID is started. Thus, the re-recording of the starting ID can be automatically executed by a key operation.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a magnetic recording/reproducing device such as a rotary head type digital audio tape recorder (hereinafter referred to as DAT), particularly for indicating the beginning position of a song. The present invention relates to a magnetic recording and reproducing device that automatically and accurately determines the re-recording position when re-recording additional information and the like.

[Conventional technology]

In this type of magnetic recording and reproducing device such as DAT, additional information indicating the beginning position of a song (hereinafter referred to as start ID) is recorded in the subcode area at the beginning of six songs in order to enable high-speed random access. be done. The length of this signal is set to 9 seconds by the standard.

On the other hand, the set side is equipped with a key for recording star IDs), and when the user recognizes the beginning of the song during recording and presses the key, the start data is automatically recorded for 9 seconds from that timing. It has become so. It also has an automatic start (ID) recording function in consideration of recording when the user is away, etc. This distinguishes between songs from the recording input signal level,
Star) IDs are automatically recorded sequentially every time there is a gap between songs.

By the way, in the above-mentioned manual or automatic star) ID recording, there is a request to shift the position of start II) and re-record. In other words, in manual recording, if the key operation is delayed, the start ID will be recorded after the beginning of the song, and if the key operation is too early, the star ID will be recorded before the beginning of the song. Therefore, if such a recording tape is randomly accessed,
This is because problems with cueing occur, such as when the beginning of a song is cut off or the ending portion of the previous song is played back. (0 Automatic Star) The same is true for ID recording, and the input signal level is specified. If the signal level falls below this value, it is considered to be between songs, and if the signal level rises again, this is considered the beginning of the song and starts recording the ID.This is a common method, but originally the input signal level was considered to be between songs. Since the threshold cannot be set strictly, the recording position of the star) ID does not exactly match the start timing of the song. It is desirable to automatically shift the re-recording position by a predetermined amount with high precision every time a key is operated.

Conventionally, as this type of device, the re-recording of star) ID is
In some cases, the star ID that the user wants to re-record is completely erased, and the user then re-records it at a desired position by operating keys while listening to the sound.

In addition, related to this type of device.

JP-A-57-65976 can be mentioned.

[Problem to be solved by the invention]

In the conventional technology mentioned above, there is the trouble of having to once erase the start ID of the part you want to re-record, then shift this part as appropriate while listening to the repeat operation again, and manually decide the re-recording position◇ SUMMARY OF THE INVENTION An object of the present invention is to make it possible to automatically re-record a start ID by key operation, in order to eliminate the above-mentioned trouble and improve operability.

[Means to solve the problem]

The above purpose is to use an identification means to identify the leading position of additional information, and a frequency or number of pulses corresponding to the rotation of at least one of the capstan motor or tape reel stand that drives the tape by pressing the tape with a pinch roller. a first counting means for counting by a predetermined value; a second counting means for counting the number of frequencies or pulses that is a certain value less than the count value of the first counting means; A third counting means is provided for counting the number of frequencies or pulses that are greater than the measured value by a certain value, and when the star ID re-recording key is operated, the first position of the original start ID is recorded. The tape is detected and rewound by a certain amount based on this position, and then only the data is re-recorded (dubbing) from the start when the rewound amount is less than or greater than the rewound amount by a certain value. successfully achieved.

[Effect]

When the start ID re-recording key is pressed, the tape drive mechanism is controlled to search for the beginning position of the start ID, and the beginning position of the start ID is detected by the position identification means. After detecting the position, the tape drive mechanism comprising the capstan motor starts rewinding the tape, but at the same time, the first counting means is controlled by the control signal of the position identification means and the start ID is Start counting the number of frequency signals (FG double signal or rotation pulses of the reel stand on the tape winding side or the supply side) synchronized with the rotation of the capstan motor from the top position.Then, this count value is set to a predetermined value. When the value is reached, the first counting means ends counting and at the same time controls the tape drive, which is operated by this control signal to switch to a normal playback state.

The second counting means and the fifth counting means are star) I
The re-recording position of D is selectively controlled to be shifted forward or backward relative to the original position, but from the time when the tape is in the normal playback state, the capstan motor is activated in the same way as the first counting means. It starts counting the number of FG multiplication signals or the above-mentioned pulses according to the rotation, and the total count value of the second counting means is a certain value smaller than that of the first counting means.
Further, the third counting means is set to be larger than a certain value.

When the count ends, it operates to output a control signal to the signal processing LSI that controls recording at that timing.

In the above configuration, for example, if you want to record by shifting the position from the start to the front of the original position, you can do so by operating a specified key, and the tape will be moved from the beginning position to the first position from the start.
The new star) ID is rewound to the position where the counting of the second counting means is completed, and then the data is rewritten from the start at the position where the counting of the second counting means is completed. Depending on the difference between the number counts of the counting means and the second counting means, the tape can be positioned forward by nine tape lengths.

Also, if you want to shift the star ID backwards from its original position, you can do so by performing a predetermined key operation different from the above, and the counting by the first counting means is completed from the starting position in the same way. The tape is rewound until then, and then the data is replaced when the third counting means completes counting, so the beginning of the new star ID is the first and fifth one.
The tape can be positioned backward by an amount corresponding to the difference in the total count value of the counting means.

If the absolute difference between the total count values of the second and fifth counting means with respect to the first counting means is set to be the same, even when the starting point is shifted forward or backward from its original position. The tape length is uniform, and the start ID can be automatically re-recorded by key operation, improving operability.

〔Example〕

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

FIG. 1 is a configuration diagram showing an embodiment of the present invention, in which 1 is a tape, 2 is a rotating magnetic head attached to a cylinder, 5 is a capstan motor, and 4 is an FG of the capstan motor. , 5 is a limiter amplifier that binarizes the iFG signal, 6 is a control circuit that controls the number of rotations of the capstan motor (velocity 1 phase), 7 is an operation key, 8 is a reproducing circuit that reproduces the output of the magnetic head, 9 is a head 10 is a signal processing circuit; 10 is a signal processing circuit;
11 is a star) ID head position identification means, 12° 16,
14 is the nth 1st . second and third counting means, 15
indicates the system control microcomputer.

In the same figure, for example, when re-recording is performed by shifting the start ID to the front or back of the original position, the capstan motor control circuit 6 is controlled (by operating a predetermined operation key 7) to return the tape and start TD. When the first position of the start ID is detected, the tape 1 is wound using that position as a reference point until the first counting means 12 counts a predetermined number of FG multiplication signals from the capstan FG4. When the count by the first counting means 12 is completed, the tape 1 is run in the normal playback state, and the counting of the capstan FG signal by the second counting means 13 or the third counting means 14 is completed. When this happens, recording of a new start ID is started.

The operation and control will be described in detail below with reference to the operation waveform of the valley.

Figure 2 shows the operation waveforms when recording by shifting the star ID forward relative to its original position. In the figure, (a) shows the area (9se
between a). For example, if a key operation is performed to command the start position to move forward from its original position at point A in the tape playback state, the capstan motor control circuit 6 and the capstan motor 3 will be reversed and the tape 1 will be During this process, the signal processing circuit 1o is constantly reproducing signals, and data is also read from the start, but immediately after the tape passes the beginning position from the start, 1 ( , since there is no more data than the start, the detection also stops.

The start ID position identifying means 11 monitors the presence or absence of start ID data output by the signal processing circuit 1°.
At time 1o, when a control signal is output from the 0 position identification means 11 which detects that the start ID data has disappeared and outputs the control signal shown in FIG. The counting operation of the cab stan motor FG signal is started. This operation is performed using a predetermined value N, such as (, i). This continues until the count is finished.

At time t when the counting operation of Ml is completed, the capstan motor control circuit 6 is controlled to control the capstan motor 3 to the normal regeneration state, and at the same time, the second counting means 13 The counting operation of the capstan motor F'G signal starts.

The total count value of the second counting means is equal to the total count value of the first counting means 12.
is set a certain value (jN) less than the value of
At time t2 when the count is completed as shown in (e), Cf
) Outputs the control signal shown in

When the control signal is output from the second counting means 16, the signal processing circuit 10 operates to output new star ID recording data for a length of 9eec using this as a starting point, and this data is transmitted to the recording circuit. 9 and the head 2 onto the tape 1.

FIG. 2(g) shows the recording position from the start due to the above operation. The solid line indicates the position of the newly recorded start ID, but compared to the original position indicated by the dashed line,
The first counting means 12 and the second counting means 13 can be positioned before the time jt corresponding to the difference ΔN between the count values.

In addition, from the new start based on time t2, 9
If you record between seas, data will remain from the original start at a point later than the original start by an amount equivalent to Δt.
After c has elapsed, the problem can be resolved by erasing the data from the start with sufficient time margin.The control microcomputer 15 and the signal processing circuit perform this time management and the operation of identifying and erasing the old start ID. 10, but the details thereof will be omitted.Next, the operation for recording the star ID by shifting it backwards from its original position will be described.

The fifth factor shows the operation waveform. 〇Start at point A in tape 1 playback state) When a command key operation to shift the ID backwards from the original position is performed, the start position is shifted from the start position. is searched, and the tape 1 is rewound from the starting position to the time point t when the counting operation by the first counting means 12 is completed. This is the same as when recording with a shift.

At the time t when the counting operation of the first counting means 12 is finished, the capstan motor control circuit 6 is controlled and the capstan is controlled to the normal regeneration state. The counting operation of the capsta/motor FG signal by the counting means 14 starts. The selection of the second and third counting means 13, 14, depending on whether the re-recording position from the start is to be shifted forward or backward, is made by the control microcomputer 15 determining the operation key 7.

The total count value of the third counting means 14 is set to be a constant value (ΔI0) larger than the value of the first counting means 12, and the total count value is set to be greater than the value of the first counting means 12.
At step 5, the control signal shown in FIG. 5(m) is output.

When the control signal is output from the third counting means 14, the signal processing circuit 10 operates to output new star ID recording data by the length of 9 days θC starting from n, and this data is recorded on the tape 1 via the recording circuit 9 and the head 2. Therefore, the newly recorded start ID is returned to the original position indicated by the broken line, as shown by the solid line in FIG. 3(n). , the time Δt corresponding to the difference ΔN between the count values of the first counting means 12 and the third counting means 14
You will only have to move backwards. Note that, as in the case of Fig. 2, this time the star) ID is shifted backward from its original position, which corresponds to Δt, and the front side remains from the original start position. In this case, the signal processing circuit 10
The operation of erasing the old start ID is not performed until the start of recording the new start ID. The embodiment shown in FIG. 1 has been described above. In the specific design, the amount of return of the tape 1 by the first counting means 12 is determined based on the time from when the capstan motor 6 is controlled to the normal playback state until the phase control of the capstan motor 5 is locked. You need to take your time and decide. In other words, the tracking phase control in DAT playback is as follows:
This is done by well-known ATF control, but the capstan motor 3
When the tape is reversed from the tape rewind state to the normal playback state, if you start recording (subcode) from the start before the ATF control locks, the recording position will change as shown by the dotted line in Figure 4. This is because deviations occur. This A
The lock time of TF control is usually around 1 second.

Therefore, the ATF control lock time is set to 1 second, and the star)
If the shift amount of the ID re-recording position is set to 5 seconds, the tape return f must be set to 1.5 seconds or more. For example, if the re-recording position shift amount is set to 05 seconds and the tape rewind amount is set to 2 seconds, the FG of the capstan motor 3 used is 400 Hz (outputs 400 wave numbers per second). Specifically, the total count value of the first counting means 12 is 800, the second counting means 15 is 600, which is 200 less than α5 seconds, and conversely, the total count value of the third counting means 14 is 600. It is better to set it to 1000, which is 200 more.

An embodiment of the present invention has been described above.

In FIG. 1, the first to third counting means are each configured independently, but n is not particularly limited. For example, these functions can be provided by a microcomputer and controlled by arithmetic processing.

Further, although the start ID head position identifying means is provided independently, this is not particularly limited, and the signal processing circuit 10 can also be provided with this function.

Furthermore, the capstan motor FG is used to determine the amount of tape rewinding and the re-recording position from the start, but for example, a rotation pulse synchronized with the rotation of the reel stand on the tape winding side or the tape supply side is used. If the structure is such that the capstan FG is generated, it goes without saying that the same control can be performed by using this signal instead of the capstan FG, and it is easy to make various modifications without changing the gist of the present invention. .

As described above, according to the present invention, the start ID position can be automatically shifted and re-recorded with high precision by key operation.

〔Effect of the invention〕

As explained above, according to the present invention, key operation Kl)
, detect the position from the original start, rewind the tape from this position to the position where the number of PGs of the capstan motor is counted by a predetermined value, and then, while running the tape in the playback state, the number of PGs of the capstan motor is lower than the predetermined count value of the FG. A new start ID can be recorded at the point when a position is detected that is less than a certain value or more than a certain value, so the start ID
re-recording can be automated, operability can be improved, the drawbacks of the prior art can be eliminated, and a magnetic recording and reproducing device with excellent functionality can be provided.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the present invention, Fig. 2, Fig. 3
This figure is a waveform diagram for explaining the operation of FIG. 1, and FIG. 4 is a diagram showing a subcode recording area on the tape. 3... Capstan motor, 4°... Capstan motor FG, II°°° start ID head position identification means,
12...First counting means, 13...Second counting means, 14...Third counting means. 1st IL￥1 13...2 years old Kaa

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device having a function of re-recording additional information indicating the beginning position of a song recorded on a tape, a position identification means for identifying the beginning position of the additional information, and a pinch roller for moving the tape. a first counting means for counting the number of frequencies or pulses by a predetermined value according to the rotation of at least one of the capstan motor or the tape reel stand driven by the crimping of the capstan motor; a second counting means for counting the number of said frequencies or pulses that is less by a certain value; and a third counting means for counting the number of said frequencies or pulses that is more than the measured value of said first counting means by a certain value. If the additional information re-recording command is a command to shift the additional information position earlier than the original position, the tape drive mechanism is controlled to perform a signal search; The above-mentioned first
The tape is rewound until the counting of the counting means is completed, and after the operation of the first counting means is completed, the tape is played back, and at the same time, the second counting means is operated, and the second counting is performed. When the counting of the means is completed, the additional information is re-recorded, and if the re-recording command is a command to shift the additional information position to a later position than the original position, the first counting means The tape is rewound until the counting is completed, and after the rewinding is completed, the tape is played back, and the additional information is re-recorded from the time when the counting operation of the third counting means is completed. magnetic recording and reproducing device.