JPS586205B2 - Kirokusai Seisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a recording and reproducing apparatus that is equipped with a multi-element (two or more) magnetic head and is capable of recording and reproducing multi-channel (two or more) channels. What is called synchronous recording (hereinafter referred to as synchronous recording), in which a specific channel is recorded in synchronization with the recorded signal while reproducing and monitoring the signal, that is, so that the recording track positions on the recording medium are synchronized with each other.
The purpose of the present invention is to provide a recording and reproducing apparatus that can perform this process (referred to as track synchronous recording) favorably.

Track synchronized recording in multi-channel recording and reproducing devices is often used in music performances and the like.

For example, when playing back and listening to a recorded musical instrument performance on the first track on a recording medium corresponding to the first channel, and singing a song to the second track corresponding to the second channel in accordance with the musical instrument performance, Or, when recording a musical performance by multiple instruments, such as recording the performance of each instrument on each channel, if one performer makes a mistake, that performer is the only one who can listen to the recorded performance of the other performers. This may be the case when re-recording is required.

After recording, if the signals of each channel are simultaneously played back through a common multi-element playback head, a song with musical instrument performance as background music can be heard, or a musical performance by multiple instruments can be heard.

On the other hand, when such track-synchronized recording is performed using a conventional recording and reproducing apparatus having a so-called three-head configuration, which includes an erasing head, a recording head, and a reproducing head, a configuration as shown in FIG. 1 is usually adopted. obtain.

That is, as shown in FIG. 1, in a conventional recording/reproducing apparatus having a three-head configuration, each head is arranged as an erasing head 2, a recording head 3, and a reproducing head 4 sequentially from the front in the running direction A of the recording medium 1. It is configured so that

For convenience of explanation, assuming that the heads 2, 3, and 4 are for two channels, the heads 2, 3, and 4 are respectively head elements 2a, 2b, and 3a.
, 3b and 4a, 4b are configured as a two-element head in which a gap (operating gap) exists between them on one axis.

Therefore, for example, if a song is to be recorded on the first track 5a corresponding to the first channel in accordance with the musical instrument performance recorded on the second track 5b corresponding to the second channel, the second
The recording head of the track 5b, that is, the head element 3b is used as a reproducing head, and this head element 3b is used as the recording head of the second track 5b.
The signal recorded in b is reproduced, and the reproduced signal is sent to the speaker 8 through the reproduction amplifier 6 and the output amplifier 7. While listening to this, a song is blown through the microphone 10, and the audio signal is transmitted to the microphone amplifier. It is supplied to the recording head, that is, the head element 3a, of the first track 5a corresponding to the first channel through the amplifier 11 and the recording amplifier 12, and thereby records on the first track 5a while synchronizing its recording position with the second track. Do it like this.

Note that 9 is a bias oscillator connected to each element 2a and 2b of the erasing head 2 via switches SW1 and SW2. In this case, switch SW1 is closed and switch SW2 is closed.
The output of the bias oscillator 9 is applied only to the erasing head 2a of the first track 5a, so that only the first track 5a is in a recording state.

However, in this case, in a general AC bias type recording and reproducing device with a three-head configuration, the gap width (operating gap length) of the recording head is wider than that of a normal reproducing head, so when the recording head is used as a reproducing head, Due to gap loss, the reproduction frequency characteristics at high frequencies deteriorate, and the quality of the reproduction signal deteriorates.

In addition, for example, in a recording/playback device using a pulse recording method, during recording, a recording current is passed through the recording head to saturate the recording medium, so the recording head is used as a playback head as shown in Figure 1. In this case, since both the recording head elements 3a and 3b, which are close to each other, are used as a recording head and a reproducing head at the same time, the signal on the reproducing side may be incorrect due to crosstalk, and a satisfactory reproduced signal may not be obtained.

Also in this case, since the gap width of the recording head is wider than that of the reproducing head, the reproducing head cannot obtain sufficient frequency characteristics for the signals recorded on the recording medium, and cannot pick up the recorded signals.

The present invention provides a recording and reproducing apparatus that can eliminate such drawbacks and perform good track synchronization recording.

The present invention provides a recording and reproducing apparatus having a plurality of recording heads and reproducing heads corresponding to a plurality of channels, in which, during track synchronized recording, the reproducing head of another channel to be monitored is connected to a specific channel to be recorded. The recording head is placed temporally ahead of the recording head, and the recording signal supplied to the recording head corresponding to a specific channel or the reproduction signal from the reproduction head corresponding to another channel is transmitted over the required time, that is, between the reproduction head of the recording medium and the recording head. The recording signal for a specific channel is recorded in synchronization with the already recorded signal of the other channel while monitoring the reproduced signal from the other channel.

Embodiments of the recording/reproducing apparatus according to the present invention will be described below with reference to FIG. 2 and subsequent figures.

In this example, a two-channel recording/reproducing apparatus is applied as in FIG. 1, and in each figure, parts corresponding to those in FIG. 1 are given the same reference numerals and redundant explanation will be omitted.

As shown in FIG. 2, in a recording and reproducing apparatus having a three-head configuration, the present invention arranges each head in the direction A in which the recording medium 1 is transported so that the reproducing head and the recording head are opposite to the conventional arrangement. The erasing head 2, the reproducing head 4, and the recording head 3 are arranged in order from the front, keeping a required interval.

For example, during track synchronous recording in which a predetermined signal is recorded on the first track 5a corresponding to the first channel while reproducing and monitoring a signal already recorded on the second track 5b corresponding to the second channel. , the transfer time T (T= D/V,
A delay circuit 13 is inserted which delays the distance D by the distance between the reproducing head 4 and the recording head 3, and V by the transport speed of the recording medium 1.

Then, the recording system of the first channel to be recorded is set to a recording state, and the reproduction head 4b of the second channel reproduces the signal recorded on the second track 5b, and the delayed reproduction signal is transmitted through the delay circuit 13. While monitoring the signal through the speaker 8, the signal to be recorded is transmitted through the microphone 10.
, a microphone amplifier 11, and a recording amplifier 12 to the recording head 3a of the first channel, thereby recording on the first track 5a of the recording medium 1.

In this way, the reproduction head 4b can reproduce the signal recorded on the second track, and the recording head 3a can record on the first track, so that a high-quality reproduction signal can be monitored and recorded. However, even if the reproduction position of the reproduction head 4b is temporally ahead of the recording position by the recording head 3a by the time T in the first and second tracks 5a and 5b at the time of recording, the reproduction to be monitored cannot be performed. Since the signal is monitored by the delay circuit 13 with a delay of time T, the recording signal is recorded at the track position exactly matching the reproduction position of the reproduction head, and the desired track synchronous recording is performed.

Therefore, in the present invention, even if an AC bias type recording/reproducing apparatus is used as a recording/reproducing apparatus, the poor frequency characteristics at high frequencies due to the gap loss when a conventional recording head is used as a reproducing head. There is no bottom,
A good reproduction signal can be monitored.

Also, when using a pulse recording type recording/playback device,
Crosstalk during recording can be avoided and error-free reproduction signals can be obtained, and good reproduction signals can also be obtained with sufficient reproduction frequency characteristics.

FIG. 3 is another embodiment of the invention.

In a head arrangement similar to that shown in FIG. 2, during track synchronous recording, a microphone amplifier 11 of the recording system is connected to the recording head 3a of the first channel to be recorded, contrary to the case of FIG. 2.
A delay circuit 13 is inserted between the recording amplifier 12 and the recording amplifier 12.

Then, while reproducing the already recorded signal of the second track 5b with the reproducing head 4a and monitoring the reproduced signal,
A recording signal delayed by the time T from the microphone 10 through the delay circuit 13 is sent to the recording head 3 of the first track 5a.
a, so that it is recorded on the first track 5a.

Therefore, in this case, with the recording head 3 positioned ahead of the reproducing head 4 with respect to the direction in which the recording medium 1 is transported, the recording signal supplied to the recording head 3a is delayed by a time T, so that the first trunk 5a The recorded position is exactly synchronized with the position of the monitored reproducing head 4b, so that the desired track-synchronized recording is performed as in the case of FIG.

Therefore, the configuration shown in FIG. 3 also provides the same effects as those shown in FIG. 2.

FIG. 4 shows still another embodiment of the present invention.

The heads are arranged in the same way as in FIG. 1 so that the erasing head 2, the recording head 3, and the reproducing head 4 are sequentially arranged from the front in the transport direction A of the recording medium 1. A 1,000-stage switch S and a bridge are inserted between each recording system and reproduction system corresponding to the second channel.

The switching means S and S' each comprise a first and a second switch S and S2, S1' and S2' which are interlocked with each other.

That is, in the first channel, the first switch S1
For example, the movable contact a1 is connected to the reproducing head 4a, and its first and second fixed contacts b1 and b2 are connected to the input side of the reproducing amplifier 6 and the output side of the recording amplifier 12, respectively.

Further, for example, the movable contact a2 of the second switch S2 is connected to the recording head 3a, and the first and second fixed contacts b3 and b4 are connected to the output side of the recording amplifier 12 and the input side of the reproduction amplifier 60, respectively. Connect to.

In the second channel, for example, the movable contact a1' of the switch S1' is connected to the reproducing head 4b, and its first and second fixed contacts b1' and b2' are respectively connected to the reproducing amplifier 6'. It is connected to the input side and the output side of the recording amplifier 12'.

Also, for example, the movable contact a2' of the switch S2' is connected to the recording head 3b, and its first and second fixed contacts b
3' and b4' are connected to the output side of the recording amplifier 12' and the input side of the reproduction amplifier 6', respectively.

During track-synchronized recording, as shown in FIG. A delay circuit 13 similar to that shown in FIG. 3 or FIG. 3 for delaying a monitor reproduction signal or a signal to be recorded is connected.

The delay circuit 13 may be connected from the outside as an adapter, or may be built into the main body of the apparatus in advance.

t1 and t2 are the recording system input terminal and reproduction system output terminal of the first channel, respectively, and t3 and t4 are the recording system input terminal and reproduction system output terminal of the second channel, respectively.

Note that portions of the second channel that correspond to the configuration of the first channel are indicated by the same reference numerals with a dash attached.

In this configuration, during normal simultaneous recording of the first and second channels, the movable contacts a1 and a2 of the switches S1 and S2 are connected to the fixed contacts b1 and b3, respectively, as shown in FIG. 4A, and the switch S1 ' and S2' movable contact a
1' and a2' are connected to the fixed contacts b1' and b3', respectively, and at the same time both switches SW1 and SW2 between the erase head and the bias oscillator 9 are turned on to put the first and second tracks 5a and 5b into the recording state. If recording signals corresponding to the husband and wife are supplied from the terminals t1 and t3, simultaneous recording can be performed on the first and second tracks 5a and 5b.

Next, when performing track synchronous recording on the track 5a of the first channel, switch the movable contacts a1 and a2 of the switches S1 and S2 to the fixed contacts b2 and b4, respectively, and move the recording head 3a toward the reproducing amplifier 6 side. Then, the reproducing head 4a should be connected to the recording amplifier 12 side, and the movable contacts a1'/a2' of the switches S1'/and S2' should be switched to the fixed contacts b2' and b4', respectively, for monitoring. track 5
The reproducing head 4b of b is connected to the recording amplifier 12' side, and the recording head 3b is connected to the reproducing amplifier 6' side.

In this case, the reproducing head 4b is substantially connected to the output side of the recording amplifier 12' of the second channel via the switch 14, for example.
It is possible to prevent the recording signal from being supplied to the

At the same time, the switch SW2 is turned off and the switch SW1 is turned on to supply the output from the bias oscillator 9 only to the erasing head 2a.

Then, the delay circuit 13 is inserted into the output side of the amplifier 6' of the second channel to be monitored or the input side of the recording amplifier 12 of the first channel to be recorded.

In this way, the second channel recording head 3b is used as a reproducing head to reproduce the signal recorded on the second track 5b, and while monitoring this reproduced signal, the first channel to be recorded is reproduced. Since the head 4a is used as a recording head, a recording signal is recorded on the first track 5a.

In this way, during track-synchronized recording, the substantial reproducing head 3b of the second channel to be monitored is temporally earlier than the substantial recording head 4a of the first channel to be recorded with respect to the movement of the recording medium 1. Since the monitor is positioned so that either the monitor playback signal or the recording signal is delayed, errors in the monitor playback signal due to crosstalk can be avoided as in the case of FIGS. 2 and 3. , good track synchronization recording can be performed by monitoring a high quality playback signal.

In the above example, the present invention was explained using a two-channel recording/reproducing apparatus, but it is of course applicable to a multi-channel recording/reproducing apparatus having two or more channels.

Furthermore, in the above example, track synchronization recording for a specific channel is performed via a delay means, and during playback, each channel is simultaneously played back by a common multi-element playback head. When recording for a specific channel and ultimately obtaining mutually synchronized playback signals by simultaneously playing back each channel, recording for a specific channel is performed using the corresponding recording head, and playback signals for monitoring of other channels are recorded using the corresponding recording head. It is also possible to perform this with each playback head and delay the signal of a specific channel or other channels during playback to obtain a synchronized playback signal.

FIG. 5 shows an example of the reproduction mode in that case.

In this example, while monitoring the signals already recorded on the first and third tracks 5a and 5c corresponding to the first and third channels, the second track 5b corresponding to the second channel is monitored.
This is the case when the recording signal is recorded.

First, although not shown in the drawings, recording is performed by, for example, using a head arrangement similar to that shown in FIG. 2, and reproducing signals from the already recorded first and third tracks using their corresponding reproduction heads, and monitoring this. Meanwhile, a recording signal is recorded by the recording head corresponding to the second track 5b to be recorded.

Therefore, in the pattern of the tracks 5a, 5b and 5c of the first, second and third channels immediately after recording, as shown in FIG. 5, the track 5b of the second channel precedes the other tracks 5a and 5c.

When reproducing the next time, the reproduction signals from the reproduction heads 4a and 4c corresponding to the first and third channels are supplied to the mixing circuit 15 through the reproduction amplifiers 6a and 6c, respectively, and the signals of the second channel are reproduced. The reproduction signal is reproduced through the head 4b and the reproduction signal from the reproduction amplifier 6b is transmitted to the recording medium 1.
If the signal is supplied to the mixing circuit 15 through the delay circuit 13 which delays the transfer time between the recording head and the reproducing head, a synchronized reproduction signal from each track can be obtained through the speaker 8.

In this example, the present invention is applied to a recording/reproducing apparatus having a head arrangement similar to that shown in FIG. 2, but it can also be applied to a recording/reproducing apparatus having a head arrangement as shown in FIG.

As described above, according to the present invention, in a recording and reproducing apparatus capable of recording and reproducing a plurality of channels, during track synchronized recording, the substantial monitor playback head is moved in time from the recording head of a specific channel to be recorded. By placing the monitor playback signal or the recording signal to be recorded on a specific channel in advance and delaying the required time, a high quality playback signal can be obtained and extremely good track synchronization recording can be achieved. This makes it suitable for application to a recording/playback device using a recording method or a pulse recording method.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a recording state during track synchronous recording by a conventional recording/reproducing apparatus, FIGS. 2 and 3 are diagrams respectively showing a recording state during track synchronous recording by a recording/reproducing apparatus of the present invention, and FIG. Figures A and B are system diagrams showing recording states during simultaneous recording and track synchronized recording by a recording/reproducing apparatus according to another example of the present invention, and Fig. 5 shows a playback state during synchronized playback to provide an explanation of the present invention. FIG. 1 is a recording medium, 2 is an erasing head, 3 is a recording head, 4 is a reproduction head, 5a, 5b, 5c are first, second and third tracks, 6 and 6' are reproduction amplifiers, and 7 is an output increaser. 8 is a speaker, 9 is a bias oscillator, 10 is a microphone,
11 is a micro amplifier, 12 is a recording amplifier, and 13 is a delay circuit.

Claims (1)

[Claims] 1. In a recording and reproducing device equipped with a plurality of recording heads and reproducing heads corresponding to a plurality of channels, the recording head corresponding to a specific channel among the plurality of channels may be used to connect the reproducing head corresponding to another channel to a tape. The recording signal supplied to the recording head corresponding to the specific channel or the reproduction signal from the reproduction head corresponding to the other channel is delayed for a required period of time, and the recording signal for the specific channel is A recording/reproducing device configured to monitor a reproduced signal from the other channel and record it in synchronization with an already recorded signal of the other channel.