JP2001216607A - Digital magnetic recorder and magnetic recording/ reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cost-wise advantageous and highly convenient digital magnetic recorder having the recording compatibility as to plural formats furnished with the similar basic parts. SOLUTION: When format discriminating signal Sf (dvcpro) is outputted by a format discriminating part 800, recording equalizers 21p, 24p adaptable to the DVCPRO format are selected by equalizing performance selecting parts 27, 28 through the selection of recording amplifiers 22p, 25p adaptable to the DVCPRO format. Also, when a format discriminating signal Sf (dv) is outputted, recording equalizers 821d, 824d adaptable to the DV format are selected by the equalizing performance selecting parts 27, 28 through the selection of recording amplifiers 822d, 823d adaptable to the DV format, and also the tape speed adaptable to the DV format is set in the capstan motor control system 3000.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital magnetic recording apparatus and a magnetic recording / reproducing apparatus, and more particularly to recording compatibility between a plurality of different formats, especially DVC.
The present invention relates to a technique for ensuring recording compatibility between a PRO format and a DV format. The present invention mainly targets a magnetic recording device / magnetic recording / reproducing device for business use. A camera-integrated type that also performs imaging is a suitable target. However, it is not necessary to limit to such a thing, and it is assumed that the present invention can be widely applied to any type of apparatus and apparatus.

[0002]

2. Description of the Related Art As an example of a conventional digital magnetic recording apparatus for business use, there is a D-7 of the VTR standard.
There is a magnetic recording device using the DVCPRO format corresponding to the above. This DVCPRO format is an extension of the DV format, which is a typical example of the consumer VTR standard, for business use (for broadcasting). The DVCPRO format is applicable to systems such as camcorders, studio VTRs, editing editors, and high-speed playback VTRs.

According to a digital magnetic recording / reproducing apparatus (studio machine) of the DVCPRO format for business use, in the 25 mega mode, a DV tape recorded in the DV format for consumer use can be reproduced. Has (playback compatibility).

[0004] The DV format and the DVCPRO format are described in "Digital Media Standard Guidebook" p114-p117, p138-p141 (edited by the Institute of Image Information and Television Engineers; Ohmsha Co., Ltd., 1999).
Can be referred to.

[0005] Hereinafter, "DVCPRO" which is a typical example of a digital magnetic recording / reproducing apparatus conforming to the standard D-7 relating to the prior art will be described. This "DVCP
RO "has playback compatibility between the DVCPRO tape and the DV tape (studio machine).

[0006] The DVCPRO format and the DV format have in common various aspects. 525/60
Regarding the methods, (1) video input signal: 4: 2: 2 component signal (2) video signal sampling frequency: 13.5 MHz (3) compression method: DV compression method (1/5 compression) (4) modulation method : 24-25 modulation method (5) Tracking method: ATF (Automatic Track Finding) (6) Tape width: 6.35 mm (1/4 inch) (7) Rotating head cylinder diameter: 21.7 mm (8) Rotating head cylinder (9) Effective winding angle: 174 ° (10) Track sector configuration: ITI sector, audio sector, video sector, subcode sector (11) Number of tracks for one frame: 10 tracks It is common with the DV format.

FIG. 16 shows a digital camera-integrated VT.
FIG. 17 is a block diagram showing an electrical configuration of a recording system 1000 for a camcorder “DVCPRO” as an example of R.
18 is a block diagram of the reproducing system 2000, FIG. 18 is a block diagram of the capstan motor control system 3000, FIG. 19 is a block diagram of the reel control system 4000, FIG. 20 is a block diagram of the flying erase control system 5000, and FIG. FIG. 22 is a block diagram of a control system 6000, FIG. 22 is a block diagram of a queue control system 7000, and FIG. 23 is a block diagram of a rotary head cylinder control system 8000.

FIG. 16 is a block diagram showing a recording system 1000.
, Reference numeral 11 denotes an analog / digital interface, 12 denotes a shuffling processing unit, 13 denotes a shuffle memory, 14 denotes a DCT unit (discrete cosine transform unit), and 15 denotes
Is an adaptive quantization section, 16 is a variable length coding section, 17 is an error correction / deshuffling processing section, 18 is a deshuffle memory, 19 is a 24-25 modulation section, 20 is a buffer, 21p
Is a first recording equalizer for DVCPRO, 22p is a first recording amplifier for DVCPRO, and 23p is a DVC
The first current control unit for PRO, 24p is DVC
PRO 2nd recording equalizer, 25p is DVCP
A second recording amplifier for RO, 26p is a second current control unit for DVCPRO, H (REC1) is a first recording head, H (REC2) is a second recording head, and 30 is a video signal processing unit It is. The basic operation of the recording system 1000 is well known, and a description thereof will be omitted.

FIG. 17 shows an electrical configuration of the reproducing system 2000.
, The symbol H (PB1) is the first read head, H (PB1
2) is the second reproducing head, 41 is the first head amplifier,
42 is a second head amplifier, 43 is a reproduction amplifier, 44 is an AGC unit (automatic gain control unit), 45p is a reproduction equalizer for DVCPRO, 46d is a reproduction equalizer for DV, 47 is an equalizing characteristic selection unit, 48 Is 24-2
5 demodulation unit, 49 is error correction / shuffling processing unit, 5
0 is a shuffle memory, 51 is a variable length decoding unit, 52 is an inverse adaptive quantization unit, 53 is an inverse DCT unit, 54 is a deshuffling processing unit, 55 is a deshuffle memory, 56 is a D / D
A conversion unit, 60 is a video signal processing unit, and 800 is a format determination unit.

The above-mentioned equalizer 45p for reproduction for DVCPRO is configured as having equalizing characteristics suitable for DVCPRO format reproduction, and the equalizer 46d for reproduction for DV is configured as having equalizing characteristics suitable for DV format reproduction. ing.

As a method of describing the format discrimination signal Sf from the format discrimination unit 800, the format discrimination signal Sf indicating the DVCPRO format recording mode is described as "Sf (dvcpro)", and the format discrimination signal indicating the DV format recording mode. The signal Sf is changed to “Sf
(dv) ".

A format discrimination signal Sf output from the format discrimination section 800 indicates a format discrimination signal Sf (dvcpr) indicating a DVCPRO format recording mode.
o), the equalizing characteristic selection unit 47
Selects a reproduction data signal from the reproduction equalizer 45p for DVCPRO and outputs it to the 24-25 demodulation unit 48.

When the format discrimination signal Sf is the format discrimination signal Sf (dv) for instructing the DV format recording mode, the equalizing characteristic selection section 47 outputs the reproduction data signal from the reproduction equalizer 46d for DV. And outputs it to the 24-25 demodulation unit 48.

The video signal processing unit 60 is shared by the DVCPRO format and the DV format.

In FIG. 18 showing the electrical configuration of the capstan motor control system 3000, reference numeral 70 denotes a capstan motor, 71 denotes an FG (Frequency Generator) amplifier, 72 denotes an FG detector, 73 denotes an internal target value counter,
4 is an FG error detector, 75 is an ATF (Automatic Track)
Finding) error detection unit, 76 is an ATF error amplifier, 77
Denotes an adder, 78 denotes an error amplifier, 79 denotes a capstan motor driver, 80 denotes a speed control unit, and 85 denotes a phase control unit.

The capstan motor control system 3 shown in FIG.
000 is also known in the art, and the operation will be described in an embodiment of the present invention, which will be described later, and therefore, the description thereof will be omitted.

In FIG. 19 showing the electrical configuration of the reel control system 4000, reference numeral 310 denotes a supply-side reel motor,
311 is a supply-side FG (Frequency Generator) amplifier,
312 is a supply-side FG detector, 320 is a take-up reel motor, 321 is a take-up FG amplifier, 322 is a take-up FG detector, 330 is a winding diameter / speed calculator, 313 is a supply-side tension control amplifier. 314 is a supply side reel driver, 323 is a take-up side tension control amplifier, 324 is a take-up side reel driver, 351 is a supply side tension sensor, 352 is a tension sensor amplifier, 353 is a target voltage, 354 is an error amplifier, and 355 is It is an adder. The basic operation of the reel control system 4000 is also well known, and the operation will be described in an embodiment of the present invention, which will be described later, and thus the description will be omitted.

In FIG. 20, which shows the electrical configuration of the flying erase control system 5000, reference numeral 401 denotes a flying erase oscillator, 402 denotes a flying erase control unit, 403 denotes a first flying erase amplifier,
Reference numeral 4 denotes a second flying erase amplifier, H (FE1) denotes a first flying erase head, and H (FE2) denotes a second flying erase head. Here, “flying erase (FE)” means “rotation erasure”. Since a pilot signal for ATF (Automatic Track Finding) is deeply recorded on a track, a flying erase is performed in order to erase the pilot signal prior to recording at the time of new recording. The basic operation of the flying erase control system 5000 is also well known, and the operation will be described in an embodiment of the present invention which will be described later.

In FIG. 21 showing the electrical configuration of the control head control system 6000, reference numeral 500 is a servo microcomputer, 501 is a control oscillator, 502 is a control amplifier, 503 is a control reproduction amplifier, and H (CTL) is a control amplifier. Head. The basic operation of the control head control system 6000 is also well known, and thus the description is omitted.

In FIG. 22, which shows the electrical configuration of the cue control system 7000, reference numeral 601 denotes an audio analog unit, 602 denotes a cue recording amplifier, 603 denotes a bias oscillator, 604 denotes an adder, and H (CUE) denotes a cue head. It is. The basic operation of the queue control system 7000 is also well known, and the operation will be described in an embodiment of the present invention, which will be described later.

In the above-described conventional digital magnetic recording / reproducing apparatus compatible with the DVCPRO format, recording and reproduction can be performed using a DVCPRO tape.
This can be achieved for playback. That is, playback compatibility is provided between the DVCPRO tape and the DV tape.

[0022]

However, in the digital magnetic recording / reproducing apparatus of the above-mentioned conventional DVCPRO tape, there is no recording compatibility between the DVCPRO tape and the DV tape. Therefore, there are the following problems.

At present, recording on a DV tape requires a magnetic recording / reproducing apparatus compatible with the DV format. In order to record on a DVCPRO tape, D
A magnetic recording / reproducing device compatible with the VCPRO tape is required. Therefore, in order to enable recording on both of these tapes, in other words, in other words, for example, recording on a DV tape and DVCPR are performed in accordance with the situation or the purpose of use.
In order to be able to properly use the recording with the O tape, both the DV format recording / reproducing device and the DVCPRO format recording / reproducing device must be purchased and stored. However, purchasing both recording / reproducing apparatuses requires a large initial cost. In order to store both recording / reproducing devices, running costs are high and a large storage space is required.

Particularly, in a digital magnetic recording / reproducing apparatus integrated with a camera, such as a camera recorder (camcorder), it must be frequently carried and carried for news gathering. Carrying and carrying together would be costly and especially demanding in terms of labor.

If the use of the DV tape and the DVCPRO tape as described above is stopped and all of them are supported by the DVCPRO tape, the DVCPRO tape may be for business use, so that the DVCPRO tape may be run more frequently than the consumer DV tape. The costs are considerably higher.

If the material to be imaged is of a relatively low grade and it is difficult to retake it, it is very convenient and practical to perform a temporary recording using a less expensive DV tape. It should be advantageous. When the results of the recording were later evaluated, full-fledged recording should be performed again using the DVCPRO tape, and when it died, recording on the DV tape was sufficient. Should be.

In addition, if the DVCPRO tape runs short during the coverage using the DVCPRO tape, the subsequent imaging cannot be performed, which hinders the work. that is,
This is because it is difficult to obtain the DVCPRO tape because the acquisition route of the DVCPRO tape is special and general electric stores do not sell the DVCPRO tape. In such a case, if both the DVCPRO tape and the DV tape can be recorded by a common recording / reproducing apparatus, it is possible to obtain the DV tape relatively easily and inexpensively, and to reduce the influence of the interruption of imaging. Should be reduced as much as possible so that resumption of imaging can be performed quickly.

However, in spite of such assumptions, a digital magnetic recording / reproducing apparatus compatible with recording of DV tapes and DVCPRO tapes has not been developed yet. In other words, the current situation is that coverage must be performed exclusively using DVCPRO tapes, and as a result, a very large burden of running costs is imposed.

As background of the above, DVCP
One of the reasons is that the following differences exist between the RO format and the DV format.

(1) Tape type DVCPRO MP tape (metal-coated tape) DV ME tape (metal-deposited tape) (2) Tape speed DVCPRO 33.8201 mm / sec DV 18.831 mm / sec (3) On magnetic tape Track width DVCPRO 18 μm DV 10 μm.

The same difference between the DVCPRO format and the DV format as described above exists between other formats.

The present invention has been made in order to solve the above-mentioned problem, and has a cost-effective and highly convenient digital device which has recording compatibility with respect to a plurality of formats similar to each other with respect to the basic part of the format. It is an object of the present invention to provide a magnetic recording device and a magnetic recording / reproducing device of a system.

[0033]

SUMMARY OF THE INVENTION The present invention, which is intended to solve the above-mentioned problems in a digital magnetic recording apparatus, is characterized in that an equalizing characteristic is varied in accordance with a result of discrimination of a recording format type. . Here, the “determination” of the recording format may include a case where the state set by the user is identified according to the tape type, and the detection of the loaded tape or its cassette may be performed by any detecting means. It may include the case of identifying the type.

The operation of the present invention is as follows.
Since the recording format is different, a plurality of types of magnetic tapes (for example, M
The greatest difference in recording compatibility between a plurality of types of recording formats that use a P tape and an ME tape is the equalizing characteristic. Therefore, an equalizing characteristic suitable for each recording format, that is, each tape to be used, is selected according to the type of the recording format. This makes it possible to provide recording compatibility for a plurality of types of recording formats.

As a result, the following advantages are obtained.

Conventionally, when a magnetic tape corresponding to the first type of recording format and a magnetic tape corresponding to the second type of recording format (for example, a DVCPRO tape and a DV tape) are selectively used, each recording format is adapted. Although two magnetic recording devices had to be prepared, according to the present invention, it is sufficient to prepare a single common digital magnetic recording device. The initial cost for the purchase is greatly reduced. The storage space is also about one half. In particular, in the case of a camera-integrated magnetic recording device, such as a camera recorder (camcorder), which is often transported and carried for news gathering, both types of magnetic recording devices are transported together as in the conventional case.・ No need to carry
This not only significantly reduces the labor burden but also saves money.

Further, it is possible to selectively use magnetic tapes corresponding to each recording format. For example, a tape which is more easily obtained because it is sold at a general electric store or the like is often used. By improving the usability, the usability and mobility can be improved. In addition, the running cost required for the tape can be significantly reduced by contriving, for example, to use a tape whose cost is lower for reasons such as consumer use.

In particular, in a camera-integrated magnetic recording device such as a camera recorder, the grade of the material to be imaged is relatively low, and when it is difficult to retake the material, a less expensive device is used. In addition, by temporarily recording using a tape that is more easily available, practical convenience and running cost reduction can be dramatically improved. Also, when recording high-grade material using a high-quality tape, if the tape runs out, switch to a lower-grade tape to continue recording without any problems. Becomes possible.
Further, when the lower-grade tape is not available, it is possible to easily obtain the tape at a general electronic store or the like and quickly resume recording while minimizing the influence of interruption of imaging.

Conventionally, when a tape recorded by a magnetic recording device corresponding to only the first type of recording format is reproduced by another reproducing device,
Playback can be performed only by a playback device of the same type, that is, the first type of format, and similarly, a tape recorded by a magnetic recording device that supports only the second type of recording format can be reproduced by another playback device. When performing playback,
Reproduction can only be performed by a reproduction device of the same type, that is, a second type of format-compatible reproduction device. In other words, when an image is to be taken from now on, the type of tape and the type of magnetic recording device are limited according to the format type of the reproducing device that is to be used for reproducing the recording tape. However, according to the present invention, the tape type is different from the tape type and the magnetic recording device type. Regardless of the format type of the reproducing apparatus in use, there is no need to switch the magnetic recording apparatus, and it is possible to cope with the mere mode switching using a single common magnetic recording apparatus.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be generally described.

The digital magnetic recording apparatus according to the first aspect of the present invention is characterized in that recording in a plurality of types of formats can be selected, and that the equalizing characteristics are varied according to the result of discrimination of the type of the recording format. Things.

The operation according to the first aspect of the present invention is substantially the same as that described in the above section [Means for Solving the Problems].

The digital magnetic recording apparatus according to the second aspect of the present invention comprises a first type recording equalizer corresponding to the first type recording format and a second type recording equalizer corresponding to the second type recording format. An equalizer, a format discriminator for discriminating the type of recording format, and an equalizing characteristic for selecting one of the first kind of recording equalizer and the second kind of recording equalizer according to the discrimination result of the format discriminator. And a selector. This corresponds to a more specific description of the first invention.

That is, a plurality of recording equalizers of a first type and a second type of recording are provided according to the number of types of recording formats, instead of a single type of equalizer. I have. Further, a format discriminating unit for discriminating the plurality of types of recording equalizers is provided, and an equalizing characteristic selecting unit for selecting any one of the recording equalizers based on the discrimination result is provided.

Here, the following should be noted. That is, in terms of expression, they are referred to as "first type" and "second type", but this is merely described as such in order to simplify the expression. That is, it should be understood that this does not only mean that the number of types of recording equalizers is two, but may include the case of three or more types. As for the “format discriminator”,
It should be interpreted in the same manner as described in the section of “Means for Solving the Problems” above.

The operation of the second invention is as follows. The format discriminating unit discriminates which recording format is used, and provides the discrimination result to the equalizing characteristic selecting unit. The equalizing characteristic selection unit selects a recording equalizer according to the given determination result. That is, when the discrimination result indicates the first type of recording format, the first type of recording equalizer is selected, and when the discrimination result indicates the second type of the recording format, the recording equalizer is selected. Select This makes it possible to realize recording compatibility while responding to changes in the equalizing characteristics depending on the tape type.

The digital magnetic recording apparatus according to a third aspect of the present invention is the digital magnetic recording apparatus according to the second aspect, wherein the first-type recording equalizer, the second-type recording equalizer, and the equalizing characteristic selection unit are connected to each other. A first type recording amplifier and a second type recording amplifier are individually interposed therebetween, and a first type recording amplifier and a second type recording amplifier are respectively inserted into the first type recording amplifier and the second type recording amplifier. It is characterized in that a kind of current control unit and a second kind of current control unit are provided.

The operation according to the third aspect of the invention is as follows. The magnetic recording device with the recording compatibility uses a plurality of types of magnetic tapes with different magnetization characteristics such as coercive force, but the difference in the magnetization characteristics may cause a difference in the magnitude of the recording current. There is. The present invention is intended to cope with the difference in the recording current. That is, when a tape corresponding to the first type of recording format requires a relatively larger (or smaller) recording current, the first type of current control unit supplies the first type of recording amplifier to the recording amplifier. An instruction is given to obtain a relatively large (or small) recording current. Also, tapes corresponding to the second type of recording format are relatively smaller (or larger).
If the recording current is sufficient, an instruction is given to the second type recording amplifier so that the relatively small (or large) recording current can be obtained from the second type current control unit. This makes it possible to realize recording compatibility while responding to changes in recording current depending on the tape type.

The digital magnetic recording apparatus according to a fourth aspect of the present invention is the digital magnetic recording apparatus according to the second or third aspect, wherein each of the constituent elements corresponds to each of a plurality of recording heads mounted on a rotary head cylinder. It is characterized by being attached separately. This corresponds to a more specific description of the second and third inventions. That is, a digital magnetic recording apparatus is generally of a helical scan type, and includes a rotary head cylinder. The rotating head cylinder generally traces a plurality of tracks on a magnetic tape in one rotation. In other words, a plurality of recording heads are mounted on the rotary head cylinder, and the respective constituent elements in the second and third inventions are individually provided for each recording head. Is what it is. In other words, if the fourth invention is not limited, the present invention
This also means that a single recording head mounted on the rotary head cylinder may be included.

The digital magnetic recording apparatus according to the fifth aspect of the present invention is the digital magnetic recording apparatus according to the first to fourth aspects, wherein the tape speed controlled by the capstan motor control system is:
It is characterized by being variable according to the result of the discrimination of the type of the recording format.

Although the type of magnetic tape to be used varies depending on the recording format, in general,
At the same time, the tape speed also changes. Therefore,
As described above, it is necessary to select a recording format, that is, an equalizing characteristic suitable for the used tape, and to configure the tape speed to be variable according to the used tape. This fifth invention describes that fact.

When a rotary head cylinder corresponding to the first type of recording format is used as the rotary head cylinder, the head width of the recording head may not directly correspond to the second type of recording format. There is. However, by adjusting the tape speed, overwriting is performed when the recording head traces the magnetic tape, and as a result of the overwriting, the track width corresponds to the second type of recording format.

The operation of the fifth aspect is as follows. The format discriminator determines which recording format is used, and varies the equalizing characteristics based on the discrimination result, and also controls the capstan motor control system based on the discrimination result to vary the tape speed. I do. This makes it possible to realize recording compatibility while coping with a change in the equalizing characteristics depending on the tape type and a change in the tape speed depending on the tape type.

The digital magnetic recording apparatus according to a sixth aspect of the present invention is the digital magnetic recording apparatus according to the fifth aspect, wherein the target value in the servo speed control section and the gain in the phase control section in the capstan motor control system are respectively Is changed in accordance with the result of the discrimination of the type of the recording format. This corresponds to a more specific description of the fifth invention.

The operation according to the sixth aspect of the invention is as follows. The gain in the servo phase control unit is varied based on the determination result of the recording format type together with the target value in the servo speed control unit. The format discriminating unit determines which recording format is used, varies the equalizing characteristics based on the discrimination result, and sets the target value and phase control in the servo speed control unit in the capstan motor control system. The gain in the section is varied. This makes it possible to realize recording compatibility in response to a change in the equalizing characteristic depending on the tape type, and in response to a change in the tape speed depending on the tape type while operating the capstan servo.

In the digital magnetic recording apparatus according to a seventh aspect of the present invention, in the sixth aspect, the target of the target value variable by the speed control unit is an FG error detection unit, and the variable target value is variable by the phase control unit. It is characterized in that the target of the gain to be performed is an ATF error amplifier. Here, "FG" is a frequency signal generator (Frequency Generator),
"AFT" means Automatic Track Detection
Finding). This corresponds to a more specific description of the sixth invention.

By the way, if the above-mentioned fifth invention is viewed in the opposite way, when not limiting the fifth invention,
The present invention can also include a case where the tape speed is not changed among a plurality of types of used tapes having different recording formats. That is the eighth invention described below.

The digital magnetic recording apparatus according to the eighth aspect of the present invention is the digital magnetic recording apparatus according to the first to fourth aspects, wherein the type of the recording format is determined with respect to the tape speed controlled by the capstan motor control system. It is characterized by not being variable regardless of the outcome.

The operation of the eighth invention is as follows. That is, when the used tape is changed, the equalizing characteristic varies according to the used tape, but the tape speed remains unchanged. In this case, reproduction compatibility is lost, but recording compatibility can be ensured.

That is, it is assumed that when recording is performed on the basis of the first type of recording format, the portion that had been recorded on the first type of magnetic tape was switched to the second type of magnetic tape.
In this case, the equalizing characteristics are switched to the second type of equalizing characteristics, but the tape speed remains the same as in the case of the first type of recording format.
The recording compatibility of the second type of magnetic tape recorded in this way is of course ensured, and the reproduction compatibility is ensured as long as the data is reproduced by the magnetic recording apparatus.

Contrary to the above, it is assumed that when the recording is performed on the basis of the second type of recording format, the place where the recording was performed on the second type of magnetic tape is switched to the first type of magnetic tape. In this case, the equalizing characteristic is switched to the first type of equalizing characteristic, but the tape speed remains the same as in the case of the second type of recording format. With the first-type magnetic tape recorded in this way, recording compatibility is of course ensured,
Reproduction compatibility is ensured as long as reproduction is performed in the magnetic recording device.

The digital magnetic recording apparatus according to the ninth aspect of the present invention is the digital magnetic recording apparatus according to the first to eighth aspects, wherein the tape tension controlled by the reel control system is changed according to the result of the discrimination of the recording format type. It is characterized by being variable.

A plurality of types of magnetic tapes to be changed according to the difference in recording format have different tape thicknesses, and the necessary tape tension changes accordingly. Therefore, as described above, it is necessary to select a recording format, that is, an equalizing characteristic suitable for a used tape, and to configure the tape tension to be variable according to the used tape. This ninth invention describes that fact.

The operation of the ninth invention is as follows. The format discriminating unit discriminates which recording format is used, varies the equalizing characteristics based on the discrimination result, and varies the tape tension by controlling the reel control system based on the discrimination result. This makes it possible to realize recording compatibility while coping with a change in the equalizing characteristics depending on the tape type and a change in the tape tension depending on the tape type.

The digital magnetic recording apparatus according to the tenth aspect of the present invention is the digital magnetic recording apparatus according to the ninth aspect, wherein the tape tension in said reel control system is varied by switching a target voltage for an error amplifier with respect to a supply-side tension sensor. It is characterized by performing with. This corresponds to a more specific description of the ninth invention.

The digital magnetic recording apparatus according to the eleventh aspect of the present invention is the digital magnetic recording apparatus according to the first to tenth aspects, wherein the erase signal for the flying erase head in the flying erase control system is determined by determining the type of the recording format. Is supplied or cut off according to the following conditions.

The magnetization characteristics such as the coercive force change depending on the type of the magnetic tape. Therefore, depending on the recording format, so-called deep recording may be performed in which recording is performed to a deep portion in the tape thickness direction. In particular, a signal having a relatively low frequency may result in deep recording. As such a signal, for example, a pilot signal for ATF (auto track finding), which is the basis of tracking servo, can be given. When such a deep recording has already been performed,
To surely erase the deep recording signal prior to recording, it is necessary to perform flying erase. However, depending on the type of the magnetic tape and the recording format, it may not be necessary to perform such flying erase. The eleventh invention is intended to cope with such an unnecessary difference of the flying erase.

The operation according to the eleventh invention is as follows. The format discriminating unit discriminates which recording format is used, varies the equalizing characteristics based on the discrimination result, and judges whether or not the flying erase is necessary based on the discrimination result, and supplies the erase signal. Or shut off. When the erase signal is supplied, the recording quality can be ensured, and when the erase signal is not supplied, useless power consumption can be avoided. By controlling in this manner, it is possible to realize recording compatibility while coping with a change in the equalizing characteristics depending on the tape type and with or without the need for flying erase depending on the tape type.

The digital magnetic recording apparatus according to the twelfth aspect of the present invention is the digital magnetic recording apparatus according to the first to eleventh aspects, wherein the control signal for the control head in the control head control system is added to the result of the discrimination of the recording format type. It is characterized by supplying or shutting off accordingly.

Some recording formats do not have the concept of a control track. This is mainly the case of a recording format in which ATF (auto track finding) is performed. However, with the recording of the control signal on the control track together with or instead of the ATF,
In some recording formats, the tape position and the track position are detected. For example, when running starts from a state in which the magnetic tape is stopped, it takes time until on-track, so that the responsiveness deteriorates only with the ATF. Therefore, if a control signal recorded in the control track is used, the tracking servo can be pulled in instantaneously. In this way, the start-up is made faster, and then the ATF is switched. This makes it possible to quickly start up while improving the tracking accuracy as a whole. This first
The second invention is intended to cope with such an unnecessary difference in control signal recording.

The operation of the twelfth invention is as follows. The format discriminating unit discriminates which recording format is used, varies the equalizing characteristics based on the discrimination result, and judges whether control signal recording is necessary based on the discrimination result. Supply or shut off. When the control signal is supplied, the tracking servo can be pulled in quickly, and when the control signal is not supplied, wasteful power consumption can be avoided. By controlling in this way, it is possible to realize recording compatibility while coping with a change in the equalizing characteristics depending on the tape type and also with the necessity of control signal recording depending on the tape type.

A digital magnetic recording apparatus according to a thirteenth aspect of the present invention is the digital magnetic recording apparatus according to the first to twelfth aspects, wherein the analog audio signal to the cue head in the cue control system is used as a result of the discrimination of the recording format type. It is characterized by supplying or shutting off accordingly.

Some recording formats do not have the concept of a cue track. This is mainly the case of a recording format compatible with consumer use. But,
In a recording format compatible with business, there is a recording format in which an analog audio signal is also recorded in a cue track in consideration of a case where a search for an insert point at the time of editing is performed using reproduced audio. The thirteenth invention is intended to cope with such an unnecessary difference in cue signal recording.

The operation of the thirteenth invention is as follows. The format discriminating unit discriminates which recording format is used, varies the equalizing characteristics based on the discrimination result, and determines whether the analog audio signal should be recorded on the cue track based on the discrimination result. Judge, and supply or cut off the analog audio signal. When the analog audio signal is supplied, the above cue reproduction can be favorably performed, and when the analog audio signal is not supplied, wasteful power consumption can be avoided. By controlling in this way, it is possible to realize recording compatibility while coping with a change in the equalizing characteristics depending on the tape type and with whether or not analog audio signal recording is required depending on the tape type.

In a digital magnetic recording apparatus according to a fourteenth aspect of the present invention, in the first to thirteenth aspects, the recording format is a DVCPRO format or a DV format.

According to the fourteenth aspect, the following operation is provided. That is, the recording compatibility between the DVCPRO format and the DV format is realized.

The magnetic tape compatible with the DV format is inexpensive, and is easily available at general electric stores, so that the running cost can be reduced.
Further, the magnetic recording apparatus, which has performed DV format recording using a DV tape, can be reproduced by a general consumer reproducing apparatus. Further, when the magnetic recording device has a reproducing function, a magnetic tape recorded using a general consumer digital recording device can be reproduced in the DV format mode. In addition, recording on a DV tape with the single device is also D
Recording on a VCPRO tape is also possible, and the initial cost burden is reduced. In addition, DVCPRO format recording and DV
Format recording can be used properly. DV
When performing imaging with CPRO tape, DVCP
When the RO tape runs out, DV
It is also possible to switch to tape and continue imaging.
As described above, the convenience in actual use is dramatically improved.

Further, it is advantageous that the circuit configuration for recording and reproducing the DVCPRO format and the circuit configuration for recording and reproducing the DV format have great commonality.
In the magnetic recording / reproducing apparatus compatible with both formats according to the present invention, the circuit scale is not significantly increased as compared with the conventional magnetic recording / reproducing apparatus. The increase in up can be sufficiently suppressed.

According to a fifteenth aspect of the present invention, there is provided a digital magnetic recording apparatus according to any one of the first to fourteenth aspects, in addition to the functions of the magnetic recording apparatus according to any one of the first to fourteenth aspects. Is characterized by having reproduction compatibility with respect to. According to the fifteenth aspect, not only recording compatibility but also reproduction compatibility can be ensured.

Hereinafter, specific embodiments of a digital magnetic recording / reproducing apparatus according to the present invention will be described in detail with reference to the drawings. In the following embodiment, a recording format having playback compatibility and recording compatibility between the DVCPRO format and the DV format will be described as an example.

The conditions necessary for reproduction compatibility and recording compatibility will be described in advance.

When two or more recording formats and tapes having different magnetization characteristics are used, that is, both an MP tape (metal-coated tape) and a ME tape (metal-deposited tape) can be used. In order to make the recording and reproduction compatible between the two or more formats, the characteristics of the magnetic recording on each magnetic tape must be considered. That is, the equalizing characteristics must match each tape. Otherwise, normal or good quality recording and reproduction cannot be performed. This is the basis.

In addition, the recording pattern on the magnetic tape in the still mode must be the same. For this purpose, the track on the tape must have the same inclination for each format when the tape is not running, and the track angle (lead angle) and cylinder diameter of the lower cylinder are determined so as to be such. There is a need to.

In the case of the DV format and the DVCPRO format, the number of revolutions of the cylinder (9000 revolutions) and the cylinder diameter (21.7 mm) are the same, and the track angle (9.15 °) of the lower cylinder and the head arrangement are also set to the same. Have been. Therefore, the DV format and the DVCPRO format have the same recording pattern on the tape in the still state. From another angle, if the tape pattern is the same, the cylinder diameter, the lower cylinder track angle, the rotation speed, the head arrangement, and the like can be freely set.

Next, the DV format and the DVCPR
The relationship between the tape speed and the track pitch for the O format will be described.

In the case of the DV format, the tape speed is 18.83 mm / sec. When the tape starts running from the still state at the above speed, the inclination of the track changes from 9.15 ° to 9.1668 in the case of still.
Stand up to °. However, this value is a value when there is no tension, and a slight difference occurs when tension is applied. When the position where the next head hits the tape is calculated, the distance from the center of the track being traced during the still to the center of the next track is 10 μm. If the tape continues to run at this speed, the next track will be written on the tape every 10 μm. The track pitch of 10 μm in the DV format is determined in this manner.

Next, in the case of the DVCPRO format, since the tape speed is 33.82 mm / sec, the tape speed is 9.9 ° from the track inclination (9.15 °) during still.
It will stand up to 1784 °. At this time, if the position where the next head hits the tape is calculated, it will be 18 μm behind the position traced during the still. If the tape keeps running at this speed, 18μ
The next track is written on the tape every m. Track pitch 18 in DVCPRO format
μm will be determined in this way.

From the above, it can be said that the tape speed is determined based on the track pitch of each format for recording compatibility and reproduction compatibility. In other words, when the recording is performed at a tape speed of 33.82 mm / sec, the track angle is about 9.17 ° and the track width is 18 μm, based on the DVCPRO format-compatible rotary head cylinder.
When recording is performed at a tape speed of 18.83 mm / sec, DV format recording can be performed at a recording track having a track width of 10 μm at substantially the same track angle.

However, as described in the eighth aspect of the present invention, the tape speed can be set arbitrarily if only the tape compatibility is to be ensured only for recording. It is also possible to employ tape speed.

Hereinafter, a digital DVCPRO / DV compatible magnetic recording / reproducing apparatus according to the embodiment will be specifically described.

FIG. 1 shows a DVCPRO according to an embodiment of the present invention.
System 10 for / DV compatible magnetic recording / reproducing device
FIG. 2 is a block diagram of a reproduction system 2000, FIG. 3 is a block diagram of a capstan motor control system 3000, and FIG. 4 is a reel control system 4000.
FIG. 5 shows a flying erase control system 500.
FIG. 6 shows a control head control system 60.
FIG. 7 is a block diagram of a cue control system 7000, FIG. 8 is a block diagram of a rotary head cylinder control system 8000, FIG. 9 is a block diagram of a format discriminator, and FIG. 10 is a screen display state when a format is designated. Figure, Figure 1
1 is a configuration diagram of a rotary head cylinder corresponding to the DVCPRO format, FIG. 12 is a side view of the rotary head cylinder, FIG. 13 is a track pattern diagram of the DVCPRO format, and FIG. 14 is a track pattern diagram of a general DV format. 15 is an explanatory diagram of overwriting.

FIG. 1 is a block diagram showing a recording system 1000 in the digital magnetic recording / reproducing apparatus of the present embodiment.
, Reference numeral 11 denotes an analog / digital interface, 12 denotes a shuffling processing unit, 13 denotes a shuffle memory, 14 denotes a DCT unit (discrete cosine transform unit), and 15 denotes
Is an adaptive quantization section, 16 is a variable length coding section, 17 is an error correction / deshuffling processing section, 18 is a deshuffle memory, 19 is a 24-25 modulation section, 20 is a buffer, 21p
Is a first recording equalizer for the DVCPRO format, 22p is a first recording amplifier for the DVCPRO format, and 23p is a first recording equalizer for the DVCPRO format.
24p is a second recording equalizer for the DVCPRO format, and 25p is a DVCPR
The second recording amplifier for O format, 26p is DV
A second current control unit for the CPRO format,
H (REC1) is a first recording head, H (REC2) is a second recording head, and 30 is a video signal processing unit. The above components are the same as in the case of the prior art (FIG. 16).

As new components in the present embodiment, reference numeral 821d denotes a first recording equalizer for DV format, 822d denotes a first recording amplifier for DV format, and 823d denotes a first recording amplifier for DV format. 824d, a second recording equalizer for DV format, 825d, a second recording amplifier for DV format, 826d, a second current control unit for DV format, and 27, first equalizing. A characteristic selecting unit, 28 is a second equalizing characteristic selecting unit, and 800 is a format determining unit.

The video signal processing unit 30 is shared by the DVCPRO format and the DV format.

The digital data supplied from the video signal processing unit 30 is supplied to four systems via the buffer 20.

In the first system, the recording current is supplied to the first recording equalizer 21p for DVCPRO, equalized, supplied to the next first recording amplifier 22p, and supplied to the first current control unit 23p. The control is performed and the result is output to the first equalizing characteristic selection unit 27.

In the second system, the recording current is supplied to the second recording equalizer 24p for DVCPRO, equalized, supplied to the next second recording amplifier 25p, and supplied to the second current control unit 26p. The control is performed, and the result is output to the second equalizing characteristic selection unit 28.

The recording equalizers 21p and 24p
The p, the recording amplifiers 22p and 25p, and the current control units 23p and 26p are configured to perform equalizing characteristics and recording current control suitable for DVCPRO format recording.

In the third system, the recording current is supplied to the first recording equalizer 821d for DV, equalized, supplied to the next first recording amplifier 822d, and supplied to the first current control unit 823d to control the recording current. The control is performed and the result is output to the first equalizing characteristic selection unit 27.

In the fourth system, the recording current is supplied to the second recording equalizer 824d for DV, equalized, supplied to the next second recording amplifier 825d, and supplied to the second current control unit 826d. The control is performed, and the result is output to the second equalizing characteristic selection unit 28.

These recording equalizers 821d and 821d
4d, recording amplifiers 822d and 825d, and current control units 823d and 826d are configured to perform equalizing characteristics and recording current control suitable for DV format recording.

The format discriminating unit 800 determines that the current recording mode set by the user is DVCPRO.
It is determined whether the recording is the format recording or the DV format recording, and a format discrimination signal Sf according to the discrimination result is output to each unit.

The format discriminating section 800 includes not only the recording system 1000 in FIG. 1 but also the reproducing system 2000 in FIG. 2, the capstan motor control system 3000 in FIG. 3, the reel control system 4000 in FIG. 4, and the flying erase control in FIG. System 500
0, the control head control system 6000 in FIG. 6, and the cue control system 7000 in FIG.

The specific configuration of the format determining section 800
The operation will be described later with reference to FIGS.

The output destination of the format discrimination signal Sf is a first equalizing characteristic selecting unit 27 and a second equalizing characteristic selecting unit 28 in the block configuration of FIG.

As a method of describing the format discrimination signal Sf from the format discrimination unit 800, the format discrimination signal Sf indicating the DVCPRO format recording mode is described as “Sf (dvcpro)”, and the format discrimination signal indicating the DV format recording mode is indicated. The signal Sf is changed to “Sf
(dv) ".

When the format discrimination signal Sf is DVCPRO
When the format discrimination signal Sf (dvcpro) indicates the format recording mode, the first and second equalizing characteristic selection units 27 and 28 receive signals from the DVCPRO first and second recording amplifiers 22p and 25p. Is selected and output to the first and second recording heads H (REC1) and H (REC2).

With the rotation of the rotary head cylinder 900 shown in FIG. 11, the first recording head H (REC1) and the second recording head H (REC2) alternately trace the magnetic tape. The recording data signals are recorded digitally on the magnetic tape by the recording heads H (REC1) and H (REC2).

As described above, the format determining section 8
When 00 designates the DVCPRO format recording mode, the recording equalizers 21p and 24p, the recording amplifier 22 for performing equalization characteristics and recording current control suitable for the DVCPRO format recording and its magnetic tape MP tape (metal coated tape).
The p and 25p and the current control units 23p and 26p are selected as a result, and the recording data signal in a state suitable for the DVCPRO format recording is supplied to the first and second recording heads H (REC1) and H (REC2). Will be.

When the format discrimination signal Sf is the format discrimination signal Sf (dv) for instructing the DV format recording mode, the first and second equalizing characteristic selection units 27 and 28 control the DV first discard. And the recording data signals from the second recording amplifiers 822d and 825d, and select the first and second recording heads H (REC).
1), output to H (REC2).

Thus, the format determining section 80
When 0 indicates the DV format recording mode,
DV format recording and ME as its magnetic tape
Recording equalizer 8 for equalizing characteristics and recording current control suitable for tape (metal-deposited tape)
21d and 824d, the recording amplifiers 822d and 825d, and the current control units 823d and 826d are selected as a result, and the recording data signals suitable for the DV format recording are supplied to the first and second recording heads H (REC).
1), H (REC2).

In FIG. 2 showing the electrical configuration of the reproducing system 2000, reference numeral H (PB1) denotes a first reproducing head and H (PB2)
Is a second reproducing head, 41 is a first head amplifier, 42
Is a second head amplifier, 43 is a reproduction amplifier, 44 is AG
C section (automatic gain control section), 45p is a reproduction equalizer for the DVCPRO format, 46d is a reproduction equalizer for the DV format, 47 is an equalizing characteristic selection section, 48 is a 24-25 demodulation section, and 49 is an error correction / shuffling. Processing unit, 50 is a shuffle memory, 51 is a variable length decoding unit, 52 is an inverse adaptive quantization unit, 53 is an inverse DCT
, 54 is a deshuffling processor, 55 is a deshuffle memory, 56 is a D / A converter, 60 is a video signal processor, and 800 is a format discriminator. The configuration shown in FIG. This is exactly the same as FIG. 17).

In FIG. 3 showing the electrical configuration of the capstan motor control system 3000, reference numeral 70 denotes a capstan motor, 71 denotes an FG (Frequency Generator) amplifier,
72 is an FG detector, 73 is an internal target value counter, 74 is an FG error detector, and 75 is an ATF (Automatic Track Find).
ing) Error detection unit, 76 is an ATF error amplifier, 77 is an adder, 78 is an error amplifier, 79 is a capstan motor driver, 80 is a speed control unit, 85 is a phase control unit,
These components are the same as in the case of the prior art (FIG. 18).

As new components in this embodiment, reference numeral 831 denotes a target value counter control unit, and reference numeral 832 denotes an error amplifier gain control unit. Reference numeral 800 denotes a format determination unit.

The basic operation of the speed control section 80 is as follows. That is, the capstan FG pulse (294 shots per capstan rotation) output from the capstan motor 70 is supplied to the capstan FG amplifier 71 and amplified, and then supplied to the FG detection unit 72, and the output is output as the FG error. The internal target value counter 73 in the detection unit 74
And an error component is output.

The basic operation of the phase control unit 85 is as follows. That is, the ATF signal input from the RF circuit is supplied to the ATF error detector 75, which detects the amount of track deviation, and supplies the output to the ATF error amplifier 76.

Then, after adding the error component from the FG error detection unit 74 and the error component from the ATF error detection unit 76, the error component is supplied to the error amplifier 78, and is supplied to the capstan motor driver 79 as a control signal. The capstan motor driver 79 drives the capstan motor 70 based on the control signal.

The format discriminating unit 800 sends the DVCPR
When the format determination signal Sf (dvcpro) indicating the O format recording mode is output, the target value counter control unit 831 sets a counter target value suitable for DVCPRO format recording in the internal target value counter 73.
The counter target value is a larger value than in the case of DV format recording. It is the tape speed of DVCPRO format recording (33.82 mm / sec).
This corresponds to c), and specifically, is set to 1580 Hz (the frequency of one cycle of the FG pulse).

Further, the error amplifier gain control section 832
At the time of the format determination signal Sf (dvcpro), a gain suitable for DVCPRO format recording is set for the ATF error amplifier 76. Specifically, the gain is set to a value about 10% larger than that in the case of DV format recording.

The format discriminating section 800 sends the DV
When the format discrimination signal Sf (dv) indicating the format recording mode is output, the target value counter control unit 831 sets a counter target value suitable for DV format recording in the internal target value counter 73. The counter target value is a smaller value than in the case of the DVCPRO format recording. It corresponds to the tape speed of DV format recording (18.83 mm / sec), and specifically, is set to 879 Hz (frequency of one cycle of FG pulse).

The above setting is based on the following reason. The number of capstan FG pulses output from the capstan motor 70 is 294 per rotation of the capstan.
This means that even in DVCPRO format recording mode, DV
The format recording mode is the same, and is constant irrespective of the tape speed fluctuation. The time required to output one reference pulse, that is, the cycle, changes according to the tape speed.

The FG error detecting section 74 is provided with a capstan FG.
The time required to output one pulse of the reference pulse, that is, the cycle, is compared with the time data from the internal target value counter 73, and the difference is output to the adder 77.

Further, the error amplifier gain control section 832
At the time of the format determination signal Sf (dv), a gain suitable for DV format recording is set for the ATF error amplifier 76. The gain is a smaller value than in the case of DVCPRO format recording.
The gain is set to a gain that is reduced by about 20% in the case of the VCPRO format recording.

This is because the MP tape is used for recording in the DVCPRO format, whereas the ME tape is used for recording in the DV format, to cope with the difference in the tape used.

The gain is adjusted in this manner, and the ATF error amplifier 76 outputs an error signal whose level has been optimized as in the case of DVCPRO format recording to the adder 77.

As described above, the error component due to the tape speed and the error component due to the difference between the tapes are added by the adder 77.
Are integrated. The total error component is further amplified by the error amplifier 78 and supplied to the capstan motor driver 79 as a control signal. The capstan motor driver 79 drives the capstan motor 70 based on the control signal.

Thus, the format determining section 80
When 0 indicates the DV format recording mode,
A tape speed suitable for DV format recording is set.

In FIG. 4 showing the electrical configuration of the reel control system 4000, reference numeral 310 indicates a supply-side reel motor,
11 is a supply-side FG amplifier, 312 is a supply-side FG detector,
Reference numeral 320 denotes a take-up reel motor, 321 denotes a take-up FG amplifier, 322 denotes a take-up FG detection unit, 330 denotes a winding diameter calculation / speed calculation unit, 313 denotes a supply-side tension control amplifier, 31
4 is a supply side reel driver, 323 is a take-up side tension control amplifier, 324 is a take-up side reel driver, 351 is a supply side tension sensor, 352 is a tension sensor amplifier, 354 is an error amplifier, 355 is an adder. Of the prior art (FIG. 1)
Same as 9).

As new components in this embodiment, reference numeral 841 denotes a target voltage switching control unit, and reference numeral 842 denotes a target voltage output unit. Reference numeral 800 denotes a format determination unit.

FG (Fr) from the take-up side reel motor 320
After the signal is supplied to the winding-side FG amplifier 321 and amplified, the signal is supplied to the winding-side FG detection unit 322, and the detection result is supplied to the winding diameter calculation / speed calculation unit 330, and the information is also obtained. Is calculated as the winding-side tension control voltage.
To the take-up side reel driver 324 as a take-up side reel torque control voltage. The take-up reel driver 324 drives the take-up reel motor 320 based on the supplied control voltage.

On the other hand, F from the supply side reel motor 310
After the G signal is supplied to the supply-side FG amplifier 311 and amplified, the signal is supplied to the supply-side FG detection unit 312, and the detection result is supplied to the winding diameter calculation / speed calculation unit 330, and the calculation is performed based on the information. The result is supplied to the supply-side tension control amplifier 313 as a supply-side tension control voltage, and is supplied to the adder 355 as a reel torque control voltage.

The tension voltage detected by the supply side tension sensor 351 is amplified by the tension sensor amplifier 352 and supplied to the error amplifier 354. Then, in the error amplifier 354, a difference between the voltage of the supply-side tension target value supplied from the target voltage output unit 842 and the detected tension voltage is obtained, and is output to the adder 355. The target voltage supplied from the target voltage output unit 842 is switched depending on whether the recording format is the DVCPRO format or the DV format. The tension control voltage supplied from the supply-side tension control amplifier 313 and the tension control voltage supplied from the error amplifier 354 are added in the adder 355, and the final tension control voltage resulting from the addition is supplied to the supply-side reel driver 314. Is supplied as a side reel torque control voltage. The supply-side reel driver 314 drives the supply-side reel motor 310 based on the supplied control voltage.

The format discriminating unit 800 sends the DVCPR
When the format determination signal Sf (dvcpro) indicating the O format recording mode is output, the target voltage switching control unit 841 sends the DVCPR to the target voltage output unit 842.
An instruction is issued to output a target voltage suitable for O-format recording. The target voltage is a larger value than in the case of DV format recording. It is DVCP
This is because the MP tape (metal-coated tape) used for RO format recording has a relatively large tape thickness, and it is necessary to apply a greater tension. As the target voltage in the case of the DVCPRO format recording, specifically, for example, the tension at the supply side outlet is 52.9 × 10 ⁻³ N
(Newton) (5.4 g weight) is output.

When the format discrimination signal Sf from the format discrimination section 800 is the format discrimination signal Sf (dv) indicating the DV format recording mode, the target voltage switching control section 841 sets the target voltage output section 8
42 is instructed to output a target voltage suitable for DV format recording. The target voltage is DVC
This value is smaller than that in the case of PRO format recording. The reason is that the tension to be applied may be smaller because the tape thickness of the ME tape (metal-deposited tape) used for DV format recording is smaller.
As the target voltage in the case of the DV format recording, specifically, for example, the tension at the supply side outlet is 44.1 × 1.
A voltage corresponding to about 0 ^-3 N (Newton) (4.5 g weight) is output.

In FIG. 5 showing the electrical configuration of the flying erase control system 5000, reference numeral 401 denotes a flying erase oscillator, 402 denotes a flying erase control unit, 403 denotes a first flying erase amplifier,
Reference numeral 4 denotes a second flying erase amplifier, H (FE1) denotes a first flying erase head, and H (FE2) denotes a second flying erase head. The above components are those of the prior art (FIG. 20). Is the same as

As new components in the present embodiment, reference numeral 851 is a current control unit for the first flying erase, and 852 is a current control unit for the second flying erase. Reference numeral 800 denotes a format determination unit.

In DVCPRO format recording, an MP tape (metal-coated tape) is used as the magnetic tape. AT which is the basis of tracking servo
The pilot signal for F (auto track finding) is recorded on the tape at a relatively low frequency, but when the frequency is low, the recording tends to be deep. And MP
In the case of a tape, since the coercive force is basically large, there is a strong tendency for deep recording. Therefore, in order to surely erase the pilot signal already recorded on the magnetic tape prior to recording at the next recording, it is necessary to perform flying erase.
It is necessary to supply relatively high power and relatively high frequency erase signals to (FE1) and H (FE2).

Therefore, the format determining section 800
When the format discrimination signal Sf (dvcpro) indicating the VCPRO format recording mode is output, the first and second flying erase current control units 851 and 852 correspond to each other, as in the case of the related art. The first and second flying erase amplifiers 403 and 404 are activated.

In this case, the flying erase oscillator 4
01 is supplied to the first and second flying erase amplifiers 403 and 404, and while the flying erase control unit 402 appropriately controls these amplifiers, the high frequency current for erasing is supplied to the first and second flying erase controllers. 2 flying erase heads H (FE1) and H (FE2).

On the other hand, in the case of DV format recording, an ME tape is used as the magnetic tape. M
The E tape has a characteristic that the coercive force is relatively low, so that deep recording is less likely to occur than the MP tape, and new recording is performed by simply performing overwrite recording while erasing the already recorded pilot signal. it can. Therefore, in the DV format, generally, the flying erase need not be performed.

Therefore, when the format discriminating section 800 outputs the format discriminating signal Sf (dv) instructing the DV format recording mode, the first and second discriminating signals are output.
Current control unit 851, for flying erase
852 makes the corresponding first and second flying erase amplifiers 403 and 404 inactive (inactive). As a result, a relatively high frequency erase signal current for erasing does not flow through the first and second flying erase heads H (FE1) and H (FE2).
Thus, useless power consumption can be avoided.

The flying erase head H (FE1)
, H (FE2) may be stopped by stopping the flying erase amplifiers 403 and 404, instead of stopping the flying erase oscillator 401. In addition, a switch is inserted at any point in the current path, and the on / off control of the switch is performed so that the flying erase is turned on / off between when recording in the DVCPRO format and when recording in the DV format. You may.

By the way, depending on the conditions, even in the case of recording in the DV format, it may be preferable to perform the flying erase when it is desired to surely erase the lower frequency components. Flying erase may be performed.

In FIG. 6 showing the electrical configuration of the control head control system 6000, reference numeral 500 is a servo microcomputer, 501 is a control oscillator, 502 is a control amplifier, 503 is a control reproduction amplifier,
H (CTL) is a control head, and the above components are the same as those of the prior art (FIG. 21).

As a new component in the present embodiment, reference numeral 861 is a control oscillator control section. Reference numeral 800 denotes a format determination unit.

There is no concept of a control track in DV format recording for consumer use. In the VHS, there is a control track standard for tracking servo, but in the DV format, the ATF (Auto
Since the pilot signal for matic track finding is performed by deep recording for the recording track,
It eliminates the need for control tracks.

On the other hand, in the DVCPRO format for business use, in addition to using the pilot signal for ATF (auto track finding),
A control signal for tracking servo recorded on a control track is also used. That is, for example, when running starts from a state where the magnetic tape is stopped, it takes time until on-track, so that the responsiveness deteriorates only with the ATF. Therefore, if a control signal recorded in the control track is used, the tracking servo can be pulled in instantaneously. In this way, the start-up is made faster, and then the ATF is switched. This makes it possible to quickly start up while improving the tracking accuracy as a whole.

Because of the above conditions, the following operation is performed.

[0149] The format discriminating section 800 outputs the DVCPR.
When the format discrimination signal Sf (dvcpro) indicating the O format recording mode is output, the control oscillator control unit 861 activates the control oscillator 501 as in the case of the related art. The control signal from the servo microcomputer 500 is transmitted to the control oscillator 50.
The control signal is modulated by 1 to generate a control signal, and the control signal is recorded on the control track of the magnetic tape from the control head H (CTL) via the control amplifier 502.

During playback, the control head H (C
TL) is supplied to the servo microcomputer 500 via the reproduction amplifier 503 for control.

On the other hand, the format determining section 800
Outputs a format discrimination signal Sf (dv) instructing the DV format recording mode, the control oscillator control unit 861 makes the control oscillator 501 inactive (inactive). As a result, no control signal is supplied to the control head H (CTL), and no control signal is recorded on the control track of the magnetic tape. Thus, useless power consumption can be avoided.

Instead of stopping the oscillation of the control oscillator 501, the control amplifier 502 may be stopped, or a switch may be inserted at any point in the current path and the switch may be turned on. /
By performing the off control, the control signal recording may be turned on / off at the time of the DVCPRO format recording and at the time of the DV format recording.

In FIG. 7 showing the electrical configuration of the cue control system 7000, reference numeral 601 denotes an audio analog unit,
602 is a cue recording amplifier, 603 is a bias oscillator, 604 is an adder, H (CUE) is a cue head,
The above components are the same as in the case of the related art (FIG. 22).

As a new component in the present embodiment, reference numeral 871 denotes an oscillator control unit. Also, 800
Is a format determination unit.

In the DV format recording for consumer use, there is no concept of a cue track. On the other hand, in the business-compatible DVCPRO format, a search for an insert point at the time of editing is performed using reproduced audio. When searching for fast forward (FF) or rewind (REW),
The audio signal by PCM recording reproduced from the recording track is interrupted. To compensate for this, an analog audio signal is also recorded on the cue track. Because of analog recording, the cue head H (CU
E) There is no interruption in the playback audio signal from.

Because of the above conditions, the following operation is performed.

The format discriminating unit 800 sends the DVCPR
When the format determination signal Sf (dvcpro) indicating the O format recording mode is output, the oscillator control unit 8
71 activates the bias oscillator 603. Then, as in the case of the prior art, an analog audio signal is supplied to the cue recording amplifier 602, and the bias oscillation signal from the bias oscillator 603 is added, and the cue track H (CUE) is transferred from the cue head H (CUE) to the cue track on the magnetic tape. Record the analog audio signal.

On the other hand, the format determining section 800
Outputs a format determination signal Sf (dv) instructing the DV format recording mode, the oscillator control section 871 sets the bias oscillator 603 to inactive (inactive). As a result, the cue head H (CUE)
No audio signal is supplied to the cue track of the magnetic tape, and no analog recording of the audio signal is performed. Thus, useless power consumption can be avoided.

Instead of stopping the oscillation of the bias oscillator 603, the cue recording amplifier 602 may be stopped, or a switch may be inserted at any point in the current path, and the switch may be turned off. By performing on / off control, cue recording may be turned on / off at the time of DVCPRO format recording and at the time of DV format recording.

FIG. 8 shows a rotary head cylinder control system 8000.
FIG. 23 is a block diagram showing an electrical configuration of this embodiment. This configuration is the same as that of FIG. 23 in the case of the prior art.

FIG. 9 is a block diagram showing an electrical configuration of the format determining section 800. In FIG. 9, reference numeral 8
01 is a menu operation unit, 802 is a menu determination unit, 80
3 is a control unit, 804 is a menu display control unit, and 805 is a menu display unit. FIG. 10 shows an example of a menu display displayed on the menu display unit 805.

The set value of the menu screen is changed by the menu operation unit 801 and the information is changed to the menu judgment unit 80.
2 and supplies the determination result to the control unit 803.
The control unit 803 changes the display of the menu display unit 805 via the menu display control unit 804 according to the result of the menu determination unit 802, and also controls the format determination signal Sf, ie, the format determination signal Sf (dvcpro), which is a control signal related thereto. Or format determination signal S
Output f (dv).

FIG. 11 shows the arrangement of heads in a rotary head cylinder 900 conforming to the DVCPRO format as viewed from the axial direction. As shown in FIG.
First recording head H (REC1) and second recording head H (REC2)
Are mounted on the rotating upper cylinder of the rotary head cylinder 900 at a distance of 180 ° from each other,
In addition, both recording heads H (REC1) and H (REC
2) means that the first read head H is shifted to a position shifted by 90 ° in phase.
(PB1) and the second reproducing head H (PB2)
They are mounted separately. In the upper cylinder, the first and second flying erase heads H (FE1) and H (FE2) are located immediately upstream of the first and second recording heads H (REC1) and H (REC2) in the rotational direction, respectively. It is installed.

FIG. 12 shows a head arrangement in a state where the rotary head cylinder 900 is developed in the circumferential direction. The first flying erase head H (FE1) is arranged above the first recording head H (REC1) in the axial direction, and as shown in the track pattern of FIG. Head H (FE1) is the first recording head H (REC1)
2 tracks ahead by two tracks.

Further, the first reproducing head H (PB1)
Rotating head cylinder 90 for recording head H (REC1)
The first read head H (PB1) is behind the first recording head H (REC1) by one track as shown in the track pattern of FIG. It is in a state.

The rotary head cylinder 900 has a diameter of 21.
The rotation speed is 9000 rpm, which is the same in the DVCPRO format recording mode and the DV format recording mode.

FIG. 13 shows a tape pattern in the DVCPRO format. Hereinafter, this will be described. 95
0 is magnetic tape, 951 is ITI (Insert and Trackin)
g Information) sector, 952 is audio sector,
953 is a video sector and 954 is a subcode sector. 955 is a control track and 956 is a cue track.

[0168] The ITI sector 951 is an area for recording tracking information for insert editing, and specifically records the position information of each sector and an identification code (position detection on a track). When editing inserts,
The first and second recording heads H (REC
1), playback by H (REC2) realizes accurate tracking and accurate insert position control in the track length direction.

An audio sector 952 is an area for recording digital audio information.
Information such as an edit start / end signal and the number of samples per frame is recorded in an (Audio auxiliary data) section. There are two channels, NTSC (525/6
In 0), each channel is recorded alternately every five tracks.

The video sector 953 is an area for recording digital video information, and further has a VAUX (Vide
o Closed caption signal etc. are recorded in the auxiliary data section. One frame is recorded on ten tracks.

In the subcode sector 954, a time code and a recording date and time (tape management information conforming to SMPTE / EBU) are recorded. In order to reproduce data even during high-speed reproduction, the sync block length is made shorter than other sectors, and data is recorded redundantly.

The first and second recording heads H (REC1), H
By alternately tracing the magnetic tape 950 by (REC2), the recording data signal is recorded digitally on the magnetic tape. Adjacent tracks are closely guardless.

FIG. 14 shows a tape pattern in the DV format recording mode. For helical scan tracks, ITI sector 951 and audio sector 95
2. The formats of the video sector 953 and the subcode sector 954 are exactly the same as the DVCPRO format. In the DV format, DVCPR
An area corresponding to the control track 955 and an area corresponding to the cue track 956 in the O format are blank areas as optional tracks. Adjacent tracks are closely guardless.

The tape pattern in the DVCPRO format recording mode shown in FIG.
In contrast, in the tape pattern in the DV format recording mode shown in FIG. 14, the track width is 10 μm. D with the larger track width
The tracking error is less likely to occur in the VCPRO format and the reliability is higher.

In the rotary head cylinder 900 conforming to the DVCPRO format shown in FIGS.
The head width of the first and second recording heads H (REC1) and H (REC2) is 18 μm. The head width of the first and second reproducing heads H (PB1) and H (PB2) is 21 μm.
m, and the head width of the first and second flying erase heads H (FE1) and H (FE2) is also 21 μm.

As shown in FIG. 15, in the digital magnetic recording / reproducing apparatus, in the DV format recording mode, the first and second recording heads H (REC1) and 18 (m) having a head width of 18 μm corresponding to the DVCPRO format are used.
By performing overwriting at H (REC2), recording is performed with a track width of 10 μm and a track pitch of 10 μm compatible with the DV format.

The tape speed at that time is 18.83 mm / sec conforming to the DV format. That is,
The target value corresponding to the DV format is set to the internal target value counter 73 by the target value counter control unit 831 in the capstan motor control system 3000 in accordance with the format determination signal Sf (dv) specifying the DV format recording mode from the format determination unit 800. And ATF error amplifier 76 by error amplifier gain control unit 832
Is determined based on the setting of the gain corresponding to the DV format with respect to.

The first recording head H (R) having a head width of 18 μm
EC1) traces the magnetic tape 950 to the odd-numbered track 971, and the even-numbered track 972 traced by the second recording head H (REC2) also having the head width of 18 μm is overwritten OW by 8 μm, As a result, the effective odd-numbered track 971a has a track width of 10 μm conforming to the DV format.

Similarly, the second recording head H (REC 2) traces the magnetic tape 950 on an even-numbered track 972.
On the other hand, the odd-numbered track 973 traced by the first recording head H (REC1) is overwritten OW by 8 μm. As a result, the effective even-numbered track 972a has a track width of 10 μm conforming to the DV format. Becomes

Further, the odd-numbered tracks 973 traced by the first recording head H (REC1) on the magnetic tape 950 are used.
On the other hand, the even-numbered track 974 continuously traced by the second recording head H (REC2) is overwritten OW by 8 μm. As a result, the effective odd-numbered track 973a has a track width of 10 μm conforming to the DV format. Becomes

Effective track 9 after overwriting
Looking at 71a, 972a, and 973a, the recording pattern is the same as the recording pattern in the DV format recording mode shown in FIG. That is, while using the rotary head cylinder 900 having the recording heads H (REC1) and H (REC2) having a head width of 18 μm conforming to the DVCPRO format as it is,
The rotational speed of the rotary head cylinder 900 is the same,
By adjusting the tape speed, recording in the DV format can be realized. In this case, as described above, the equalizing characteristic adjustment, tape tension adjustment, flying erase stop, control signal stop, and cue recording stop are performed together.

It is to be noted that any matter described in the specification or the drawings of the present application may be omitted, added to the appended claims, and modified in the detailed description of the invention.

[0183]

According to the present invention with respect to a digital magnetic recording apparatus, since the equalizing characteristics are varied in accordance with the result of discrimination of the type of the recording format, the magnetization characteristics such as coercive force are mutually different. Recording compatibility can be provided between a plurality of types of recording formats that use a plurality of different types of magnetic tapes (for example, an MP tape and an ME tape). As a result,
The following effects are produced.

When replacing different format recordings, it is not necessary to prepare a plurality of types of magnetic recording devices corresponding to the respective formats. It is sufficient to prepare a single common magnetic recording device, and the initial cost for obtaining the same is greatly reduced. Storage space can be greatly reduced. In particular, in the case of a camera-integrated magnetic recording device, such as a camera recorder (camcorder), which is often transported and carried for news gathering or the like, the burden of the work can be greatly reduced. It also saves money.

Further, it is possible to selectively use magnetic tapes corresponding to each recording format. For example, tapes that are easier to obtain because they are sold at general electric stores or the like are often used. By improving the usability, the usability and mobility can be improved. In addition, the running cost required for the tape can be significantly reduced by contriving, for example, to use a tape whose cost is lower for reasons such as consumer use.

In particular, in a camera-integrated magnetic recording device such as a camera recorder, the material to be imaged has a relatively low grade, and when it is difficult to retake the material, a less expensive device is used. In addition, by temporarily recording using a tape that is more easily available, practical convenience and running cost reduction can be dramatically improved. Also, when recording high-grade material using a high-quality tape, if the tape runs out, switch to a lower-grade tape to continue recording without any problems. Becomes possible.
Further, when the lower-grade tape is not available, it is possible to easily obtain the tape at a general electronic store or the like and quickly resume recording while minimizing the influence of interruption of imaging.

[0187] Regardless of the format type of the playback device to be used, there is no need to switch magnetic recording devices, and only mode switching using a common single magnetic recording device is required. Playback can be performed by any playback device.

As described above, according to the present invention, usability and convenience at the time of recording can be dramatically improved.

[Brief description of the drawings]

FIG. 1 is a digital DVC according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an electrical configuration of a recording system in a PRO / DV compatible magnetic recording and reproducing apparatus.

FIG. 2 is a block diagram showing an electrical configuration of a reproducing system of the compatible magnetic recording / reproducing apparatus.

FIG. 3 is a block diagram showing an electrical configuration of a capstan motor control system of the compatible magnetic recording / reproducing apparatus.

FIG. 4 is a block diagram showing an electrical configuration of a reel control system of the compatible magnetic recording / reproducing apparatus.

FIG. 5 is a block diagram showing an electrical configuration of a flying erase control system of the compatible magnetic recording / reproducing apparatus.

FIG. 6 is a block diagram showing an electrical configuration of a control head control system of the compatible magnetic recording / reproducing apparatus.

FIG. 7 is a block diagram showing an electric configuration of a cue control system of the compatible magnetic recording / reproducing apparatus.

FIG. 8 is a block diagram showing an electrical configuration of a rotary head cylinder control system of the compatible magnetic recording / reproducing apparatus.

FIG. 9 is a block diagram of a format determining unit of the compatible magnetic recording / reproducing apparatus.

FIG. 10 is a screen display state diagram when a format is specified for the compatible magnetic recording / reproducing apparatus.

FIG. 11 is a diagram showing D of the compatible magnetic recording / reproducing apparatus.
Configuration diagram of a rotary head cylinder compatible with the VCPRO format

FIG. 12 is a side elevational view of a rotary head cylinder of the compatible magnetic recording / reproducing apparatus.

FIG. 13 shows D for the compatible magnetic recording / reproducing apparatus.
Track pattern diagram of VCPRO format

FIG. 14 is a track pattern diagram of a general DV format.

FIG. 15 is an explanatory diagram of overwriting of the compatible magnetic recording / reproducing apparatus.

FIG. 16 shows a camcorder “DV” of a camera-integrated VTR, which is an example of a conventional digital magnetic recording / reproducing apparatus.
FIG. 2 is a block diagram showing an electrical configuration of a recording system for “CPRO”.

FIG. 17 is a block diagram showing an electrical configuration of a playback system for “DVCPRO” (studio machine), which is an example of a conventional digital playback apparatus.

FIG. 18 shows the above-mentioned conventional camcorder “DVCPR”.
Block diagram showing the electrical configuration of the capstan motor control system for O "

FIG. 19 is a diagram illustrating the conventional camcorder “DVCPR”;
Block diagram showing an electrical configuration of a reel control system for O "

FIG. 20 shows a conventional camcorder “DVCPR”.
Block diagram showing the electrical configuration of the flying erase control system for O "

FIG. 21 is a diagram showing the conventional camcorder “DVCPR”;
Block diagram showing the electrical configuration of the control head control system for O "

FIG. 22 shows a camcorder “DVCPR” according to the prior art.
Block diagram showing an electrical configuration of a queue control system for O "

FIG. 23 shows the above-mentioned conventional camcorder “DVCPR”.
Block diagram showing the electrical configuration of the rotary head cylinder control system for O "

[Explanation of symbols]

1000: recording system, 2000: reproduction system, 3000:
Capstan motor control system, 4000: reel control system, 5000: flying erase control system, 6000
... Control head control system, 7000 ... Cue control system, 8000 ... Rotating head cylinder control system, 11 ... Analog / digital interface, 12 ... Shuffling processing unit, 13 ... Shuffle memory, 14 ... DCT unit (discrete cosine transform unit), 15 ... Adaptive quantization unit, 16
... Variable length coding unit, 17 ... Error correction / deshuffling processing unit, 18 ... Deshuffle memory, 19 ... 24
-25 modulator, 20 ... buffer, 21p ... DVCPR
First recording equalizer for O format, 22p
... first recording amplifier for DVCPRO format,
23p: first current control unit for DVCPRO format; 24p, second recording equalizer for DVCPRO format; 25p, second recording amplifier for DVCPRO format; 26p, DVCPRO
A second current control for formatting, 27 ...
A first equalizing characteristic selecting unit, 28 a second equalizing characteristic selecting unit, 30 a video signal processing unit, 4
DESCRIPTION OF SYMBOLS 1 ... 1st head amplifier, 42 ... 2nd head amplifier, 43 ... reproduction amplifier, 44 ... AGC part (automatic gain control part), 45p ... reproduction equalizer for DVCPRO format, 46d ... reproduction for DV format Equalizer, 47 ... Equalizing characteristic selection part, 4
8 24-24 demodulation unit 49 error correction / shuffling processing unit 50 shuffle memory 51 variable length decoding unit 52 inverse adaptive quantization unit 53 inverse DCT
Unit, 54: deshuffling processing unit, 55: deshuffle memory, 56: D / A conversion unit, 60: video signal processing unit, 70: capstan motor, 71: FG
(Frequency Generator) amplifier, 72: FG detector, 73: internal target value counter, 74: FG error detector, 75: ATF (Automatic Track Finding) error detector, 76: ATF error amplifier, 77: adder, 78 ... Error amplifier, 79 ... Capstan motor driver, 80 ... Speed controller, 85 ... Phase controller,
310: supply side reel motor, 311: supply side FG
Amplifier, 312: supply side FG detection section, 313, supply side tension control amplifier, 314, supply side reel driver, 320, take up side reel motor, 321, take up side FG amplifier, 322, take up side FG detection section, 323 ...
Take-up side tension control amplifier, 324 ... Take-up side reel driver, 330 ... Winding diameter calculation / speed calculation section, 351 ...
Supply side tension sensor, 352: tension sensor amplifier, 354: error amplifier, 355: adder,
401: Flying erase oscillator, 402: Flying erase controller, 403: First flying erase amplifier, 404: Second flying erase amplifier, 500: Servo microcomputer, 501: Control oscillator, 502: Control amplifier , 503 ... playback amplifier for control, 601 ...
Audio analog section, 602: cue recording amplifier,
603: bias oscillator, 604: adder, 8
00: format determination unit, 801: menu operation unit, 802: menu determination unit, 803: control unit,
804: Menu display control unit, 805: Menu display unit, 821d: First recording equalizer for DV format, 822d: First recording amplifier for DV format, 823d: First current control for DV format 824d... Second recording equalizer for DV format; 825d... Second recording amplifier for DV format; 826d... Second current control unit for DV format; 841. target voltage switching control unit; ... Target voltage output section, 851 ... Current control section for first flying erase, 8
52: current control unit for second flying erase 861 ... oscillator control unit for control 87
1: Oscillator control unit, 900: rotary head cylinder,
950: Magnetic tape, 951: ITI (Insert and T
racking information) sector, 952 ... audio sector, 953 ... video sector, 954 ... subcode sector, 955 ... control track, 956
... cue track, 971 ... odd-numbered track, 9
72: Even-numbered track 973: Odd-numbered track 974: Even-numbered track 971a, 9
72a, 973a: valid track, H (REC1): first recording head, H (REC2): second recording head, H (PB1)
... the first read head, H (PB2) ... the second read head,
H (FE1) 1st first flying erase head,
H (FE2) ... second first flying erase head,
H (CTL): control head, H (CUE): cue head, Sf (dvcpro): format discrimination signal indicating DVCPRO format recording mode, Sf (dv): D
Format discrimination signal indicating V format recording mode, OW ... overwrite

Claims (15)

[Claims] 1. A digital magnetic recording apparatus, wherein recording in a plurality of types of formats is selectable, and an equalizing characteristic is varied according to a result of discrimination of the type of the recording format. 2. A first type recording equalizer corresponding to a first type recording format, a second type recording equalizer corresponding to a second type recording format, and a format discrimination for discriminating a type of the recording format. And an equalizing characteristic selection unit that selects one of the first type of recording equalizer and the second type of recording equalizer in accordance with the determination result of the format determination unit. Digital magnetic recording device. 3. A recording amplifier of a first type and a recording amplifier of a second type are respectively provided between the first type of recording equalizer and the second type of recording equalizer and the equalizing characteristic selection unit. That the first-type recording amplifier and the second-type recording amplifier are provided with a first-type current control unit and a second-type current control unit, respectively. 3. The digital magnetic recording apparatus according to claim 2, wherein: 4. The digital device according to claim 2, wherein each of the constituent elements is individually attached to each of a plurality of recording heads mounted on a rotary head cylinder. Type magnetic recording device. 5. The recording medium according to claim 1, wherein a tape speed controlled by a capstan motor control system is varied in accordance with a result of the discrimination of the recording format type. Digital magnetic recording device. 6. A method according to claim 1, wherein a target value in a servo speed control unit and a gain in a phase control unit in a capstan motor control system are varied in accordance with the discrimination result of the type of the recording format. The digital magnetic recording apparatus according to claim 5. 7. The apparatus according to claim 6, wherein a target of a target value variable by said speed control unit is an FG error detection unit, and a target of a gain variable by said phase control unit is an ATF error amplifier. Digital magnetic recording device. 8. The tape speed controlled by the capstan motor control system is not variable irrespective of the result of discrimination of the recording format type. A digital magnetic recording device according to any one of the above. 9. The digital recording medium according to claim 1, wherein the tape tension controlled by the reel control system is varied according to the result of the discrimination of the recording format type. Type magnetic recording device. 10. The digital magnetic recording apparatus according to claim 9, wherein the tape tension in the reel control system is changed by switching a target voltage for an error amplifier for a supply-side tension sensor. 11. An apparatus according to claim 1, wherein an erase signal for a flying erase head in a flying erase control system is supplied or cut off in accordance with a result of the discrimination of the type of the recording format.
The digital magnetic recording device according to any one of the above. 12. The control head according to claim 1, wherein a control signal for a control head in a control head control system is supplied or cut off according to a result of the discrimination of the type of the recording format. 3. A digital magnetic recording device according to claim 1. 13. The cue control system according to claim 1, wherein an analog audio signal to a cue head in the cue control system is supplied or cut off according to the result of the discrimination of the type of the recording format. 3. A digital magnetic recording device according to claim 1. 14. The recording format is DVCPRO.
14. The digital magnetic recording apparatus according to claim 1, wherein the digital magnetic recording apparatus is a digital format and a DV format. 15. In addition to the functions of the magnetic recording apparatus according to any one of claims 1 to 14, the apparatus has reproduction compatibility with a magnetic tape recorded in the plurality of types of formats. Digital magnetic recording and reproducing device.