JPH0294171A - Digital signal reproducing and recording device - Google Patents

Abstract

PURPOSE:To eliminate the necessity of a separately provided analog recording and reproducing head by providing a delaying means which delays analog signals reproduced by the 2nd reproducing head so as to compensate the delay time produced at digital signal process circuits. CONSTITUTION:The 1st reproducing head 6A for reproducing digital signals and 2nd reproducing head 16R for reproducing the analog signal of the head 6A are provided at positions where relative running directions X of a recording medium 1 to the 1st and 2nd heads 6A and 16R become equal to each other. Digital signal process circuits 23 and 24 which process reproduced digital signals and a delaying means 25 which delays analog signals reproduced by the head 16R so as to compensate delay time t1 produced at digital signal process circuits 23 and 24 are provided. Therefore, no time lag is produced between prescribed signals obtained by processing the digital signals and the analog signals and the necessity of a separately provided analog recording and reproducing head is eliminated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to a fixed head type digital tape recorder that records and reproduces an analog signal such as a musical tone as a digital signal encoded by PCM modulation or the like. The present invention relates to a suitable digital signal reproducing device and recording device.

[Summary of the invention]

The present invention is a digital signal reproducing apparatus suitable for use in a fixed head digital tape recorder that records and reproduces analog signals such as musical tones as digital signals encoded by PC'1 modulation. The first playback head that plays back the digital signal of the track and the second playback head that plays back the analog signal track (for example, cueing) are placed at the same position with respect to the relative running direction with respect to the recording medium. and a digital signal processing circuit for processing the digital signal, and a delay means for delaying the analog signal to compensate for the delay time occurring in the digital signal processing circuit. A simple mechanical unit incorporating a second reproducing head is used to maintain synchronization between the original digital signal and the analog signal.

Further, the present invention is a digital signal recording device suitable for use in such a digital tape recorder, which includes a first recording head for recording digital signals on a digital signal rank and an analog signal track on an analog signal track. A second recording head for recording is arranged at the same position in the relative running direction with respect to the recording medium, and a digital signal processing circuit for processing the digital signal and a delay time caused by the analog signal in the digital signal processing circuit are arranged. By providing a delay means for compensating the delay, it is possible to change the recording position of the digital signal and the recording position of the analog signal using a simple mechanical unit that combines the first and second recording heads. This is to maintain inline property.

[Conventional technology]

Digital tape recorders such as PCJI recording/playback machines are becoming popular in place of conventional analog tape recorders because they are resistant to distortions and noises such as wow and flutter, and have a large dynamic range. There are two types of digital tape recorders: rotating F type and fixed F type; however, the multi-channel fixed F type is mainly used for applications that require complex editing functions. ing.

To edit a digitally recorded tape, it is necessary to run the tape at high or low speed to determine the editing point (cueing), but in general, it is possible to edit a digitally recorded tape by Although it is technically possible to run at a high speed and perform analog playback, this would not only complicate the processing circuit and increase the overall size of mW, but also significantly increase the manufacturing cost. Therefore,
To listen to the recorded content as sound by running the tape at a desired tape speed, you can use an analog signal with the same content as the digitally recorded signal or a related analog signal (cue signal) to another analog signal on the tape. It is a good idea to record in synchronization with a track and use the analog signal of that track when searching for the beginning.

FIG. 6 shows such a conventional digital tape recorder equipped with an analog signal track for cueing, which is disclosed in Japanese Patent Application Laid-Open No. 57-105813.
In FIG. 6, (1) is, for example, a 172-inch wide magnetic tape, (2R) and (2L) are analog signal tracks for cueing, and (3) is a digital signal [rack group]. This digital signal track group (3) consists of digital signal tracks (4A) to (4Z) for recording, for example, 24 channels of audio signals, control signals, and time code signals, respectively.

In addition, (5) is the digital signal track (4A) ~
Magnetic heads (6A) to (6Z) corresponding to (4Z) respectively
A digital playback head consisting of magnetic tape +1
1 travels at a predetermined speed in the X direction relative to the digital playback head (5), the magnetic head (6A
) The reproduced digital signal E1 generated from the reproduction node amplifier (7) is amplified, digitally processed in the PCM demodulator (8) and demodulated into an analog signal AE1*, and then sent to the analog signal output terminal ( 9), the signal is output to a speaker (not shown) or the like. Other magnetic heads (6B) ~ (
6Z) is also processed in the same way. Also, 00) is the digital Hakugo track (
Magnetic heads (11^) corresponding to 4A) to (4Z), respectively
- (IIZ), the analog signal ^E2 supplied to the analog signal input terminal 02) is digitally processed by the PCM modulation circuit θ3), and then sent in series via the recording amplifier 04). Recording digital 14
After being converted into the number E2*, it is recorded on the digital signal track (48) by the magnetic head (118).

Recording digital signals from the other magnetic heads (IIB) to (11Z) are similarly recorded on the corresponding digital signal tracks.

Also, 05) is an analog signal track (2R), (
Magnetic navel F (16R) corresponding to (2L), (
This is an analog recording/reproducing head consisting of a magnetic belly button (16L), and during reproduction, an analog signal Q generated by a magnetic belly button (16R) is sent to a movable contact (17) of a recording/reproducing selector switch (07).
a) and one fixed contact (17b) to the analog regenerative amplifier θ0, and this analog regenerative amplifier Q8
The output signal No. 1 is supplied as a cue signal (heading signal) from a cue signal output terminal 09) to a speaker or earphone (not shown). During recording, the cue signal port 2 supplied to the cue signal input terminal (2IO) is connected to the magnetic head (16R) via the other fixed contact (17c) and movable contact (17a) of the analog recording amplifier (21) and changeover switch 07. ) from the analog signal Q as the analog signal l
- Recorded on rack (2R). Magnetic head (16L)
works similarly. For example, if a guitar sound is recorded as a digital signal on the digital signal track (4A), the analog signal as a cue signal recorded on the analog signal track (2R) may include the guitar sound itself or the guitar sound. An analog signal such as a piano sound played simultaneously, that is, an analog signal corresponding to the digital signal is selected.

[Problem to be solved by the invention]

Since the cue signal Q recorded as an analog signal on the analog signal track (2R) is used, for example, to cue the beginning of musical tones etc. recorded as the digital signal E2* on the digital signal track (4A), the cue signal Q is used as the digital signal. The corresponding cue signal must be recorded at the same position in the tape running direction (width direction) of the magnetic tape (1) to maintain in-line property. Furthermore, even if the in-line nature of the digital signal and the cue signal is maintained on the magnetic tape (1), if there is a time lag between the analog signal that reproduces the digital signal and the cue signal, there will be a substantial Inlineness is no longer maintained.

However, simply its analog signal input terminal (12)
For example, even if an analog signal of the same musical tone is supplied to the cue signal input terminal QQl, a delay time t2 required for digital processing occurs in the PCM modulation circuit 03), and the tape moves during that time t2, so in-line property is not possible. Not retained. Therefore, conventionally, as shown in FIG. 6, the magnetic tape (2) is moved in the direction opposite to the relative running direction (X direction) of the magnetic tape (2) with respect to the digital recording head 00) during the delay time t2. Interval d2 corresponding to the distance traveled
0 analog recording/playback heads were fixed. Similarly, the delay time required for digital processing in the PCM demodulation circuit (8) during playback is 1. Taking into consideration, the digital playback head is placed at an interval d1 corresponding to the distance that the magnetic tape (2) travels during the delay time t1 in the opposite direction to the X direction with respect to the analog recording/playback head 05). By fixing (5), analog signals such as musical tones without time lag can be obtained from the analog signal output terminal (9) and the cue signal output terminal 09).

However, in a conventional digital tape recorder, it is necessary to separately provide an analog recording/reproducing head 09 in order to maintain its in-line property, and the analog recording/reproducing head 09 is required to be connected to the analog recording/reproducing head 09.
0) and the digital reproducing head (5) must be set accurately to predetermined values, which has the disadvantage of complicating the mechanism and requiring a large number of assembly steps. In addition, if the analog recording/reproducing head 09 is provided separately, it is necessary to provide an additional set of tape guides for the magnetic tape (2).
The mechanical part became even more complex.

In view of the above, the present invention provides a digital signal that reproduces and processes a digital signal recorded on a digital signal track to obtain a predetermined signal, and also reproduces an analog signal corresponding to the digital signal recorded on an analog signal track. It is an object of the present invention to prevent a time lag from occurring between a predetermined signal and an analog signal in a signal processing device without separately providing an analog recording/reproducing head.

Further, the present invention provides a digital signal recording device that records a digital signal obtained by processing a predetermined signal on a digital signal rack, and records an analog signal corresponding to the digital signal on an analog cog signal track. Another objective is to maintain the in-line nature of the digital signal and analog signal even if an analog recording/reproducing head is not provided separately.

[Means to solve the problem]

For example, as shown in FIG. 1, the digital signal reproducing device according to the present invention has a digital signal track (4A) on which a digital signal is recorded and an analog signal track (2R) on which an analog signal corresponding to the digital signal is recorded.
is formed on the recording medium (1), and a first reproducing head (6A) for reproducing the digital signal and a second reproducing head (6A) for reproducing the analog signal are connected to the recording medium (1). The first and second reproducing heads (68) and (16R) are arranged at the same position in the relative running direction (X direction), and the first reproducing head (6A)
) and a digital signal processing circuit (23) (24) for processing the digital signal reproduced from the second reproduction circuit.
Delay means (25) for delaying the analog signal reproduced from the node (16R) so as to compensate for the delay time t1 occurring in the digital signal processing circuits (23) and (24).
).

Further, the digital signal recording apparatus according to the present invention includes, for example, as shown in FIG. A second recording head (28R) that records an analog signal corresponding to the digital signal on the analog signal track (2R) of (1) is placed at the same position with respect to the relative running direction (X direction) with the recording medium (1). and its first recording head (
A digital signal processing circuit (29) (30) that processes the digital signal recorded by IIA), and an analog signal recorded by the second recording hen F' (28R) is processed by the digital signal processing circuit (29), (30)
A delay means (31) is provided to compensate for the delay time t2 caused by the delay time t2.

[For production]

According to the digital signal reprocessing device of the present invention, the first reproducing head (6A) and the second reproducing head (16R)
Even if they are integrated and fixed, no time lag occurs between the predetermined signal obtained by processing the reproduced digital signal and the reproduced analog signal. Therefore, there is no need to provide a separate analog recording/reproducing head to eliminate the time lag.

Further, according to the digital signal recording device of the present invention, the first recording head 1ζ(IIA) and the second recording head y)(
28R) and fixed, the in-line nature of the digital signal recorded on the digital signal track (4^) and the analog signal recorded on the analog signal track (2R) is maintained. Therefore, there is no need to separately install an analog recording/reproducing head in order to maintain the in-line property.

〔Example〕

Hereinafter, an embodiment of the digital signal reproducing apparatus and recording apparatus of the present invention will be described with reference to FIGS. 1 to 5M.

In this example, the present invention is applied to a fixed head type digital tape recorder, and in FIGS. 1 to 5, parts corresponding to those in FIG. 6 are given the same reference numerals, and detailed explanation thereof is omitted. do.

FIG. 1 shows the main parts of the digital tape recorder of this example. In this FIG. ), respectively corresponding magnetic heno),
(6A) to (6Z) and analog signal track (2R)
, (2L) respectively corresponding magnetic heads (16R)
, (16L) is the relative running direction (X
They are integrally formed so that they are placed at the same position with respect to the direction. As an integrated structure, in addition to the conventional bulk type structure in which two heads are arranged side by side, a structure in which a thin film magnetic head is integrated may be considered.

In addition, in this example, a PCJI decoder (2) is connected between the playback head amplifier (7) and the analog signal output terminal (9).
3) and digital-to-analog (D/A) converter (24
) to connect. This PCM decoder (23) converts the PCM decoder (23) into the digital signal E1 output from the reproducing head amplifier (7).
After performing CM demodulation, deinterleaving, error correction, etc., it is output to the D/A converter (24) as a digital signal with a predetermined sampling frequency, and is output from the analog signal output terminal (9) to its PCJI decoder (23) and D
One analog signal AF delayed by the delay time t1 by the /A converter (24) is supplied to a sound reproduction device (not shown).

Further, the reproduced analog signal Q1 of the magnetic head (16R) which is in sliding contact with the analog signal track (2R) is sent to the input terminal of the delay circuit (25) and one of the editing mode changeover switches (26) via the analog reproduction amplifier θ mark. Fixed contact (2
6b). This delay circuit (25) delays the human input signal by the delay time t1 and transfers the output signal to the other fixed contact (26a) of the editing mode changeover switch (26).
). Then, the movable contact (26c) of this changeover switch (26) and the cue signal output terminal 09) are connected. Movable contact (26c) of this changeover switch (26)
is normally connected to the fixed contact (26a), but as will be described later, when performing so-called hand-cut editing, it is connected to the fixed contact (26b).

In FIG. 1, (27) is a mixed recording head, and this mixed recording head (27) is connected to magnetic heads (I) corresponding to digital signal tracks (48) to (4Z), respectively.
IA) ~ (11Z) and analog signal track (2R)
(2L) respectively corresponding magnetic heads (28R), (
28L) are integrally formed so as to be arranged at the same position in the X direction. An analog-to-digital (A/D) converter (29) and a PCM encoder (3) are connected between the analog signal input terminal 0 and the recording amplifier α.
0). This Δ/D converter (29) samples and holds the analog signal AE2 at a predetermined sampling frequency, converts it into a digital signal, and supplies it to the PCM encoder (30).
adds an error correction code to the digital signal, performs interleaving processing, PCM modulation, etc., and sends it to the recording amplifier OO.
The magnetic heno l'(I
IA). This digital signal E2* is delayed by a delay time t2 caused by processing in the A/D converter (29) and PCM encoder (30) with respect to the input analog signal AE2.

In this example, the analog signal 02 for cueing inputted manually at the cue signal input terminal (2Q1) is supplied to the delay circuit (31), and the delay circuit (31) delays the analog signal port 2 by the delay time t2. The analog signal 02* obtained at the
R). Also, the mixed recording head (27) falls or separates from the mixed reproducing head (22) in the X direction for a time corresponding to the delay time t and the distance that the magnetic tape (1) travels during t2. and fix it. Therefore,
This interval corresponds to d and +d2 in the conventional example shown in FIG.

Further, (32) is a master oscillator, and this master oscillator (32) generates a master clock MCK that is a synchronizing signal for the entire operation of the digital tape recorder of this example, and uses this master clock MCK to control the tape running including the gap stun. The signal is supplied to the system (33), PCM decoder (23), delay circuit (25), ^/D converter (29), PCM encoder (30), delay circuit (31), etc. Its PCM decoder (23) and PCM encoder (30)
each internally generates a sampling pulse SP by dividing its master clock MCI, and in this example, assuming that the frequency of the master clock MCK is FM and the frequency of the sampling pulse SP is F, the so-called variable pulse
When the pinch is not changed, F M = 192F
Set to s-9,21,6MHzFs = 48k)Iz. Further, the delay times t and t2 in the delay circuits (25) and (31) are made proportional to the period 1/FM of the master clock MCK.

In this example, the frequency F+4 of the master full cock MCK of the master oscillator (32) can be increased or decreased by several percent. What if this master clock? ICK frequency F
, is decreased and the master clock MCK in Figure 2 is changed to the master clock MCJ in Figure 2B, and the capsun speed of the tape running system (33) and IIcM are decreased.
The operation of the Ic-da (23) also slows down proportionally. Therefore, the sampling period of the reproduced analog signal AEI obtained from the analog signal output terminal (9) changes from T to T1 shown in FIG. 3B, and the frequency substantially decreases. This means that by increasing or decreasing the frequency I/9 of the master clock MCK of the master oscillator (32), the frequency of ε1* can be increased or decreased in the reproduced analog signal, and the so-called variable pinch operation can be easily performed. means. In addition, in this example, the PC
Since the M decoder (23) and delay circuit (25) operate in synchronization with the master clock MCK, the PC
Delay time t caused by the M decoder (23) and D/A converter (24), and delay time t1 caused by the delay circuit (25)
changes in the same way in proportion to changes in the master clock MCK. Similarly, the delay time t2 caused by the PCM encoder (30) and the A/D converter (29) and the delay time t2 caused by the delay time (31) change in the same way in proportion to changes in the master clock MCK. . Therefore, according to this example, there is an advantage that even if the frequency of one E is changed to the reproduced analog signal by the variable pinch operation, there is no need to readjust the delay circuits (25) and (31).

Also, the lap of the master clock MCK! Ull/r)
Delay time proportional to I1. An example of a delay circuit (25) that can obtain the following is shown in FIG. In this Figure 4, (
34) is the terminal to which the master clock MCK is supplied, (
35) is a control circuit, (36) is a data bus, (37) is an address bus, (38) is a sample/hold circuit, (
39) is an A/D converter, (40) is a memory that can be written at any time (RAM), (41) is a launch circuit, and (42) is a D
/A converter. The control circuit (35) synchronizes with the master clock) ICK and controls one sample/ball circuit (three
8) Analog signal port 1 supplied via the analog reproduction amplifier 081 by operating the A/D converter (39) and the A/D converter (39)
Convert to digital value. And its control circuit (3
5) uses the address bus (37) to access its RAM (4
The digital values are sequentially written from the specified location of 0), and the RA? 1 (40), the digital values are sequentially read out from addresses shifted by one address from the predetermined address of 1 (40) and held in the launch circuit (41). Therefore, its launch circuit (
The analog signal 01* obtained by converting the output of 41) by the D/A converter (42) is delayed by a predetermined time with respect to the supplied analog signal Q1. In this case, by adjusting the discrepancy between the writing and reading addresses of the RAM (40), the predetermined time can be set to a delay time t.
1. Furthermore, this delay circuit (2
5) operates in synchronization with the master clock MCK, so the delay time t1 is the same as that of the master clock MCK.
It changes in proportion to the period 1/FM.

As the delay circuit (25), other than the example shown in FIG. 4, for example, a delay circuit using a CCD or a delay line formed by winding a conductive wire around a bobbin wrapped with copper tape via an insulating tape can be used.

Using the digital tape recorder of this example, convert analog signal AE2 to PC? To explain the operation when I-modulated and recorded on the digital signal track (4^) of the magnetic tape (1) and also record the analog signal 02 for cueing on the analog signal track (2R), the analog signal input The analog signal AE2 supplied from a microphone (not shown) to the terminal 02 is sent to the A/D converter (29) and the PC.
? I encoder (30) outputs its analog signal AE2.
The signal is recorded on the digital signal track (48) as a digital signal E2* delayed by a time t2. Further, the analog signal 02 for cueing supplied from the microphone etc. to the cue signal input terminal (20) is converted into two analog signals delayed by the time t2 from the analog signal Q2 by the delay circuit (31). Recorded on the analog signal track (2R).

Therefore, according to this example, since the digital signal E2* and the analog signal 02* are recorded with the same delay time, they are recorded on the magnetic tape file by the integrated mixed recording head (27). The two digital signals E and the analog signal 02* are recorded at the same position with respect to the relative traveling direction (X direction) in (1), which has the advantage of maintaining so-called in-line property.

Regarding the operation when using the digital tape recorder of this example to reproduce the digital signal E1 recorded on the digital signal track (4A) of the magnetic tape +11 and the analog signal 01 recorded on the analog signal track (2R) To explain, use the edit mode switch (2)
6) The movable contact (26c) is the other fixed contact (26a)
It is assumed that the in-line nature of the digital signal E1 and analog signal 01 on the magnetic tape (11) is maintained.

In this case, the digital signal E1 reproduced by the magnetic head (68) in sliding contact with the digital signal track (4A) is sent to the PCM decoder (23) and the D/A converter (24).
), the analog signal ΔE14 is delayed by a certain amount of time.
The signal is converted into an analog signal output terminal (9) and supplied to an external speaker or the like. Further, the analog signal 01 reproduced by the magnetic head (1f3R) in sliding contact with the analog signal track (2R) is transmitted to the delay circuit (25) for a time of 1. It is converted into an analog signal 01* that is delayed by a certain amount of time, and is supplied to external earphones etc. from the cue signal output terminal (1). Therefore, according to this example, the magnetic head (
By using one mixed playback head (22) formed by combining 6A) and (16R), there is an advantage that an analog signal AE1* and an analog signal 01* for cueing can be obtained without any time lag from each other. .

Furthermore, in this example, the PCM encoder (30), delay circuit (31), etc. are driven in synchronization with the master clock MCK of the master oscillator (32), so the delay time of E2 and its cue are input to the analog signal. Analog signal 02 of
The delay time changes in the same way as the master clock gate cK changes. Therefore, according to this example, even if a variable pitch operation is performed by changing the frequency F of the master clock MCK, the analog signal 02* recorded on the analog signal track (2R) and the digital signal track (4A) are recorded on the analog signal track (2R). ) is advantageous in that in-line properties with the digital signal E2* recorded in ) are maintained.

Similarly, even if the variable pitch operation is performed, no time lag occurs between the reproduced analog signal AE1* and the reproduced analog signal old* for cueing.

Next, we will use the digital tape recorder of this example to record the so-called “
To explain the operation when performing "hand-cut editing", first
In the figure, the movable contact (26c) of the edit mode F changeover switch (26) is switched to one fixed contact (26b).

Hand-cut editing means that the editor places marks B1 and B2 at two editing points on the magnetic tape +11 as shown in Figure 5B, and inserts the marks B1 and B2 between them as shown in Figure 5B. This refers to manually replacing the edited portion with another editing tape (43). Therefore, it is necessary to accurately cue and determine the editing point. In this example, the movable contact (26) of the edit mode changeover switch (26)
c) is switched to one fixed contact (26b) side, the analog signal 01 for cueing reproduced from the magnetic node (16R) in sliding contact with the analog signal track (2R) remains as it is without any delay time. The cue signal output terminal 09) supplies the signal to earphones, etc. Therefore, while listening to the sound of the earphones, etc., you can place the magnetic tape (1) at a desired location.
), and as shown in FIG. 5A, the first editing point is determined by attaching a mark B1 to the part of the magnetic tape (1) that overlaps with the mixed playback head (22). . Next, by running the magnetic tape (1) again in the X direction at a high to low speed, the magnetic tape (11) is similarly stopped at the next desired location. There is a mark B2 on the magnetic tape (1, 1) that overlaps the mixed playback head (22) shown in
The second editing point is determined by adding .

As described above, since the digital tape recorder of this example is provided with the editing mode changeover switch (26), there is an advantage that manual editing can be performed easily and accurately.

In addition, in this example, the mixed recording head (22) is spaced apart by D ("dl + a2) in the
27), which enables so-called "synchronous recording". This synchronous recording refers to, for example, recording another digital signal on the digital signal track (4^) in synchronization with the digital signal recorded on the digital signal 1-rank (4Z) (maintaining inline characteristics). . In this example, the digital signal track (4
The reproduced digital signal of the magnetic head (162) in sliding contact with the magnetic head (162) is converted into an analog signal by a P(Jl decoder, etc., not shown) with a delay time t, not shown, and this analog signal is emitted from an earphone or the like. When the analog signal AE2 to be recorded is supplied to the analog signal input terminal in accordance with the sound emitted from the etc., this analog signal AE2 is converted into a digital signal E2* with a delay time t2, and is output as a digital signal by the magnetic head (IIA). is recorded on the track (4A).In this case, the magnetic head (16
After the digital signal is reproduced from the magnetic head (
IIA), the total delay time until the digital signal is recorded is (t++tz).

However, in this example, the mixed recording head (27) has a time (t++t−z) with respect to the mixed reproduction head F (22).
In between, the magnetic tape +11 is fixed at a distance corresponding to the distance traveled in the X direction.

Therefore, according to this example, in-line synchronous recording can be achieved by simply inputting a desired analog signal from the analog signal input terminal 02), etc., in accordance with the analog signal output from the analog signal output terminal (9), etc. There are profits that can be made.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that changes can be made without departing from the gist of the present invention, such as by arranging an erasing head or a crossfader circuit.

〔Effect of the invention〕

Since the digital signal reproducing circuit of the present invention is configured as described above, it reproduces and processes the digital signal recorded in the digital signal I rank to obtain a predetermined signal, and also reproduces the digital signal recorded in the analog signal track. In a digital signal processing device that reproduces an analog signal corresponding to a signal, there is an advantage that a time lag can be prevented from occurring between a predetermined signal and an analog signal without separately providing an analog recording/reproducing head. Therefore, there is an advantage that the mechanical part is simplified and the number of assembly steps can be reduced.

Further, since the digital signal recording device of the present invention is configured as described above, it records a digital signal obtained by processing a predetermined signal on a digital signal track, and converts an analog signal corresponding to the digital signal into an analog signal. In the digital signal recording device that records on the track-ζ
, there is an advantage that the in-line nature of the digital signal and analog signal can be maintained without separately installing an analog recording/reproducing head. Therefore, there is an advantage that the mechanical part is simplified and the number of assembly steps can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram including a partial perspective view showing essential parts of an embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining the variable pull pitch operation of the embodiment, and FIG. Fig. 1 is a structural part showing an example of the delay circuit (25) in the example, Fig. 5 is a diagram for explaining hand-cut editing in the embodiment, and Fig. 6M is a part showing an example of a conventional digital tape recorder. FIG. 2 is a configuration diagram including a perspective view. B111 is a magnetic tape, (2R) and (2L) are analog signal tracks, (4A) to (4Z) are digital signal tracks, (6Δ) to (6Z), (IIA
) ~ (IIZ) , (16R) , (16L) (2
8R) and (281) are respectively magnetic heads, (22) is a mixed playback throat, (23) is a PCM decoder, and (24) is
is a D/A converter, (25) is a delay circuit, and (29) is an A/A converter.
]] converter, (30) is a PCM encoder, and (31) is a delay circuit.

Claims (1)

[Claims] 1. A first reproduction method in which a digital signal track on which a digital signal is recorded and an analog signal track on which an analog signal corresponding to the digital signal is recorded are formed on a recording medium, and the digital signal is reproduced. A head and a second reproducing head for reproducing the analog signal are arranged at the same position with respect to the relative running direction between the recording medium and the first and second reproducing heads, and the analog signal is reproduced by the first reproducing head. A digital signal reproducing device comprising: a digital signal processing circuit for processing a digital signal produced by the second reproducing head; and a delay means for delaying the analog signal reproduced by the second reproducing head so as to compensate for the delay time caused by the digital signal processing circuit. Device. 2. A first recording head that records a digital signal on a digital signal track of the recording medium and a second recording head that records an analog signal corresponding to the digital signal on an analog signal track of the recording medium are connected to the recording medium. a digital signal processing circuit for processing digital signals recorded by the first recording head, and a digital signal processing circuit for processing the analog signals recorded by the second recording head; A digital signal recording device provided with a delay means for compensating for a delay time occurring in a circuit.