JP2003078865A - Digital and magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a dubbing time of recorded information subjected to video recording, recorded on a hard disk, onto a magnetic tape in a digital and magnetic recording and reproducing device having recording media of the hard disk and the magnetic tape. SOLUTION: In this digital and magnetic recording and reproducing device, a digital video data signal recorded on the hard disk is reproduced at an N-fold speed of a recording mode, the digital video data signal reproduced at the N-fold speed is recorded on the magnetic tape at the N-fold speed, and the digital video data signal recorded on the magnetic tape can be reproduced in a mode being the same as that of recording the digital video data signal on the hard disk.

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 / reproducing apparatus for recording / reproducing a video signal in a high-efficiency coded compression and in a digital recording format.

[0002]

2. Description of the Related Art Recently, an international standard MPEG (Moving Picture Expert Group) for highly efficient coding and compression of image signals has been proposed.
The p) system has been adopted to enable fast-moving television images to be transmitted or recorded with high quality.

A digital magnetic recording / reproducing apparatus for recording a digital image signal generated by the MPEG system on a magnetic tape has also been developed and put into practical use.

This digital magnetic recording / reproducing apparatus is based on the M
When recording a PEG-compressed digital video signal on a magnetic tape, STD (standard), HS (high quality), LS2, depending on the running speed of the magnetic tape, the writing speed, the angle of the data track, the number of tracks, etc. And four LS3 recording / reproducing modes are provided.

When reproducing the digital video signal recorded on the magnetic tape, it is necessary to read and reproduce the digital image signal recorded on the magnetic tape in a reproduction mode corresponding to the recording mode at the time of recording on the magnetic tape. There is.

Further, in recent years, the recording capacity of a medium for recording various digital data has been rapidly increased, and
The EG-processed digital video signal can be recorded on a recording medium such as a hard disk, a DVD-RAM, and a non-volatile semiconductor memory in addition to the magnetic tape.

Due to the increase in recording capacity of this recording medium, for example, a digital magnetic recording / reproducing apparatus provided with both recording media of a magnetic tape and a hard disk has been developed and put into practical use.

[0008]

DISCLOSURE OF THE INVENTION A digital magnetic recording / reproducing apparatus capable of recording digital video data signals on both the magnetic tape and the hard disk recording medium has a recording medium of the magnetic tape and a hard disk. This has the advantage that the recording / recording information of a desired television program or the like can be promptly recorded / recorded on the hard disk without performing the operation of loading the cassette into the device.

However, in the case of storing the recording / recording information of a television program etc. recorded / recorded on the hard disk for a long period of time, the recording / recording information recorded / recorded on the hard disk is dubbed on a magnetic tape.

When the recording record information recorded and recorded on the hard disk is to be dubbed on the magnetic tape, the recording record information is reproduced from the hard disk in the same reproduction mode as the recording mode when recording and recorded on the hard disk, and the reproduced recording is carried out. The record information is recorded and recorded on the magnetic tape in the same mode as when recording the hard disk.

In this way, the recording and recording information is reproduced from the hard disk in the same mode as the recording mode of the recording and recording information recorded and recorded on the hard disk, and the reproduced recording and recording information is driven in the same mode as the reproduction mode of the hard disk. Recording and recording on a magnetic tape requires a dubing time which is the same as the recording time of the recording and recording information on the hard disk.

That is, if the recording recording information recorded and recorded on the hard disk is dubbed on the magnetic tape, the same time as the recording and recording on the hard disk is required for the dubbing, and there is a problem that the dubbing efficiency is very poor.

In view of the above problems, the digital magnetic recording / reproducing apparatus of the present invention shortens the dubbing time at the time of dubbing the image recording / recording information recorded and recorded on the hard disk to the magnetic tape. It is an object of the present invention to provide a digital magnetic recording / reproducing apparatus that enables dubbing in a shorter time.

[0014]

A digital magnetic recording / reproducing apparatus of the present invention is a digital magnetic recording / reproducing apparatus having a magnetic tape and a hard disk as a recording medium,
Video signal conversion for a hard disk that can reproduce a video data signal of a digital recording format recorded on the hard disk into a highly efficient encoded compressed signal that can be reproduced at a data rate N times (N is an integer) the digital recording signal format at the time of recording Means and a video signal recording means for magnetic tape for converting the high-efficiency encoded compressed signal converted by the hard disk video signal converting means into a video data signal of a digital recording format and recording it on a magnetic tape at N times speed.
It is characterized by having.

In the digital magnetic recording / reproducing apparatus of the present invention, when the video data signal of the digital recording format is recorded on the magnetic tape from the magnetic tape image signal recording means, the frequency of the control signal of the digital recording format is set. It is characterized in that it has a control signal control means for recording it on the magnetic tape by multiplying it by N times.

In the digital magnetic recording / reproducing apparatus of the present invention, the control signal control means records the control signal recorded on the magnetic tape in sliding contact with a track on which a video data signal of the digital recording format of the magnetic tape is recorded. The recording is performed so that the phase difference from the rotational position signal of the rotary head becomes 1 / N. The hard disk video signal converting means of the digital magnetic recording / reproducing apparatus of the present invention is a decoder for reproducing a video data signal of a digital recording format recorded in the hard disk and converting it into a transport stream of a high-efficiency encoded compressed image signal. It is characterized by consisting of.

The video signal recording means for the magnetic tape of the digital magnetic recording / reproducing apparatus of the present invention comprises an encoder for converting the transport stream of the high efficiency encoded compressed image signal into a video data signal of a digital recording format, and this encoder. A plurality of types of magnetic heads for recording the converted video data signal according to the recording mode of the digital recording format, and a capstan motor means for controlling the running speed of the magnetic tape according to the recording mode of the digital recording format. It is characterized by having and.

The plurality of types of magnetic heads of the digital magnetic recording / reproducing apparatus of the present invention include magnetic heads corresponding to a plurality of recording / reproducing modes of the digital recording format, and the plurality of types of magnetic heads are adapted to the recording / reproducing mode. The magnetic tape is driven at a running speed according to the recording / reproducing mode by controlling the capstan motor by timely selection.

In the digital magnetic recording / reproducing apparatus of the present invention, the reproduction speed of the video data signal of the digital recording format recorded in the hard disk by the hard disk video signal converting means is N times, and the video signal recording for the magnetic tape is performed. N times the magnetic tape speed at which the video data signal of the digital recording format is recorded by the means is the reproduction speed from the hard disk, the magnetic head used by the plurality of types of magnetic heads when recording on the magnetic tape, and the magnetic tape speed. It is characterized by being set in.

The digital magnetic recording / reproducing apparatus of the present invention reproduces in a reproducing mode N times as large as the recording mode to the hard disk, and the recording / recording information reproduced in the reproducing mode N times the same as the reproducing mode. By recording and recording on a magnetic tape in double recording mode, it has become possible to greatly reduce the time required for dubbing.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a digital magnetic recording / reproducing apparatus according to the present invention, and FIG. 2 is an explanatory view for explaining a phase relationship of control signals at the time of doubling of the digital magnetic recording / reproducing apparatus according to the present invention. is there.

The digital magnetic recording / reproducing apparatus of the present invention is a digital recording format video data of a digital VHS (hereinafter referred to as D-VHS) system in which a magnetic tape and a hard disk are used as a recording medium for recording a digital video data signal. A device that records and reproduces a signal will be described as an example.

The digital magnetic recording / reproducing apparatus of the present invention enhances a hard disk driver (hereinafter referred to as HDD) 11 having a hard disk and a digital video data signal of a hard disk logical format recorded on the hard disk by a driving operation of the HDD 11. It has an HDD format decoder 12 for converting a rate-encoded compressed signal (hereinafter referred to as an MPEG signal) into a transport stream.

Although not shown, the hard disk of the HDD 11 is a digital video data signal of the recording / recording information by an HDD format encoder which encodes the transport stream of the MPEG signal of the recording / recording information into the logical format of the hard disk. Is being recorded.

The MPEG transport stream converted by the HDD format decoder 12 is DV
It is supplied to the D-VHS format encoder 13 which is converted into an HS recording format signal. This D-VHS
D-VH converted and generated by the format encoder 13
The S recording format signal is amplified by the D-VHS head preamplifier 14 into a signal of a predetermined size, and the D-VHS head preamplifier 14 amplifies the signal.
It is supplied to the recording head 15 and recorded and recorded on a magnetic tape (not shown).

It should be noted that the D-VHS format encoder 13 is, in addition to the MPEG transport stream supplied from the HDD format decoder 12,
A transport stream of an MPEG signal of recording recording information (not shown) is converted into the D-VHS recording format signal, and the D-VHS head preamplifier 14
And a D-VHS recording head 15 for recording on a magnetic tape.

D-VHS recorded on the magnetic tape
The recording format signal is adapted to be converted into an MPEG transport stream by a D-VHS format decoder via a reproduction head and a reproduction head preamplifier (not shown). The D-VHS format decoder and the HDD Format decoder 1
The MPEG transport stream converted and generated in 2 is converted into an analog video signal by an MPEG decoder (not shown) and supplied to a video display device such as a television receiver to display a recorded video. .

The HDD 11, the HDD format decoder 12, the D-VHS format encoder 13, and the D-VHS preamplifier 14 are driven and controlled by a system microcomputer (hereinafter referred to as a system microcomputer) 16.

The system microcomputer 16 also controls the rotation drive of the capstan motor 20 which drives the magnetic tape for recording the D-VHS recording format signal by the D-VHS recording head 15. .

Further, the system microcomputer 16 causes a control signal (hereinafter referred to as a CTL recording amplifier) 17 for a control signal to be recorded on the magnetic tape together with the D-VHS recording format signal, via a control signal recording amplifier (hereinafter referred to as a CTL recording amplifier) 17. Called CTL head) 1
8 and a control signal read and reproduced from the magnetic tape by the CTL head 18 is controlled through a control signal reproduction amplifier (hereinafter referred to as CTL reproduction amplifier) 19.

This control signal serves as a reference signal for tracking with the D-VHS reproducing head when reproducing the video data signal of the D-VHS recording format recorded and recorded on the magnetic tape, and serves as a capstan motor 2.
It is designed to be used for controlling the rotation drive of 0.

Next, in the digital magnetic recording / reproducing apparatus having the above-mentioned configuration, the digital video data signal recorded and recorded on the hard disk of the HDD 11 is used for the D-VHS.
The operation when the recording head 15 is used to perform dub on a magnetic tape will be described.

It is assumed that, for example, a video data signal of the D-VHS recording format of the recording recording information is recorded and recorded in the hard disk of the HDD 11 in the STD (standard) recording / playback mode of the D-VHS recording format.

When the video data signal of the D-VHD recording format recorded and recorded on the hard disk of the HDD 11 is to be recorded on the air tape, the H
The DD 11 is driven to be played back at the double speed of the STD mode at the time of recording and recording the video data signal of the D-VHS recording format, and the D reproduced from the hard disk at the double speed.
-The video data signal of the VHS recording format is the H
The DD format decoder 12 converts it into an MPEG transport stream.

That is, the MPEG transport stream output from the HDD format decoder 12 has a double data rate of the STD data rate.

That is, from the HDD format decoder 12 to the D-VHS format encoder 13
The data rate of double speed of the MPEG transport stream input to the
It is the same as the data rate in S (high quality) mode.

Therefore, the MPE reproduced by the D-VHS format encoder 13 at the double data rate.
The G transport stream is converted into a video data signal in the D-VHS recording format, the video signal data in the D-VHS recording format is amplified to a predetermined size by the D-VHS head preamplifier 14, and the D-VHS
The HS mode recording head of the HS recording head 15 records and records in the HS mode on the magnetic tape.

Since the video data signal of the D-VHS recording format recorded and recorded in the HS mode on the magnetic tape is the STD mode video data signal, the video data signal recorded and recorded on the magnetic tape is recorded. Since it is necessary to reproduce in the STD mode when reproducing, S is added to the video data signal recorded and recorded on the magnetic tape.
The identification data indicating the TD mode is recorded.

At this time, the system microcomputer 16
Since the MPEG transport stream supplied to the D-VHS format encoder 13 has a double speed data rate, the cabstan motor 20
Is controlled to drive the magnetic tape in the HS mode.

Further, when recording at double speed on a magnetic tape, since the trace angle between the recording track of the video data signal to be recorded on the magnetic tape and the reproducing head in the STD mode at the time of reproducing slightly shifts, the system microcomputer 16
Based on the control from, the fine adjustment of the drum lead angle of the drum incorporating the recording head or the acceleration / deceleration adjustment control of the rotation of the drum is performed so that the reproduction head and the recording / recording track are accurately traced. Control.

Furthermore, the video data recorded in the STD mode output from the HDD format decoder 12 is reproduced at a double speed, and the video signal recorded and recorded on the magnetic tape in the HS mode is reproduced at a single speed which is the STD mode. When reproducing, a control signal for setting the trace start position of the reproducing head is sent from the system microcomputer 16 through the CTL recording amplifier 17 to the CTL head 18.
To record on the magnetic tape.

When recording this control signal, 1
At the time of double speed reproduction, the control signal is detected by the CTL head 18 at a regular position, and the CTL reproduction amplifier 1
It is supplied to the system microcomputer 16 through 9,
It is necessary for the system microcomputer 16 to trace the reproducing head from the correct position on the magnetic tape.

For this reason, as shown in FIG.
In order to output the control signal at the normal position during the double speed reproduction, the control signal is recorded at the double frequency during the double speed recording and recording shown in FIG. The recording position of this control signal is the D-VHS recording head 15,
And the phase difference T between the rotational phase value D-FF of the rotary head in which the reproducing head is incorporated and the normal position during the 1 × speed reproduction.
On the other hand, the phase difference T2 at the time of recording at the double speed recording is recorded on the magnetic tape so as to have a relationship of 1/2 of the phase difference T1 (T2 = T1 / 2).

The video data signal recorded in the HDD 11 is recorded and recorded in the LS2 or LS3 mode. When the LS2 or LS3 recording mode is STD mode and the magnetic tape is dubbed, the recording CTL is recorded. The recording pattern of the control signal is set in consideration of L-S of the head 18.

As described above, the video signal data recorded on the hard disk is reproduced in a reproduction mode N times (N is an integer) the mode at the time of recording on the hard disk of the HDD 11, and the reproduced video signal data is magnetically reproduced. N on tape
Recording is performed in a double (N is an integer) recording mode. This allows
The video signal data recorded and recorded in the HDD 11 can be dubbed onto the magnetic tape at a speed N times faster.

Specifically, as shown in Table 1, the HD
With respect to each recording mode of D11, the reproduction speed of the HDD 11 and the recording speed of the D-VHS recording head 15 on the magnetic tape corresponding to various recording heads can significantly reduce the doubling speed.

[0047]

[Table 1] In the above description, the digital magnetic recording / reproducing apparatus of the present invention has been described by using the example in which the hard disk and the magnetic tape are incorporated as the recording medium. However, an HDD recorder or a DVD capable of recording and reproducing the video data signal
It is also required to transmit the video data signal from the recorder to the digital magnetic recording / reproducing device and perform the duplication on the magnetic tape.

In such a case, the HDD recorder / DVD recorder and the digital magnetic recording / reproducing apparatus are connected to each other by an I-link, and commands for a double-speed reproducing mode and a double-speed recording mode different from those at the time of recording on the I-link are issued. By setting, high-speed dubbing can be realized.

[0049]

According to the digital recording / reproducing apparatus of the present invention, the video data signal recorded on the hard disk can be accurately and accurately dubbed on the magnetic tape at high speed, and the video signal data dubbed on the magnetic tape is recorded on the hard disk. In addition, it has the effect of being able to reproduce without loss of mode data at the time of recording.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a digital magnetic recording / reproducing apparatus according to the present invention.

FIG. 2 is an explanatory diagram illustrating a relationship of control signals in the digital magnetic recording / reproducing apparatus according to the present invention.

[Explanation of symbols]

11 ... Hard disk driver (HDDD) 12 ... H
DD format encoder, 13 ... D-VHS format decoder, 14 ... D-VHS head preamplifier,
15 ... D-VHS recording head, 16 ... System microcomputer, 17 ... Control signal recording amplifier, 1
8 ... Control head, 19 ... Control signal reproducing amplifier, 20 ... Capstan motor.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/783 H04N 5/781 510F 5/92 F term (reference) 5C018 JA02 JA07 JB05 JC04 KA04 5C053 FA15 FA21 FA23 GA11 GB21 HA24 5D044 AB07 BC01 CC03 CC04 DE11 DE17 DE46 EF05 EF06 GK08 HL07

Claims (7)

[Claims] 1. A digital magnetic recording / reproducing apparatus having a magnetic tape and a hard disk as a recording medium, wherein a video data signal of a digital recording format recorded on the hard disk is N times the digital recording signal format at the time of recording (N is Video signal converting means for a hard disk that can be reproduced at a data rate of (integer) and converts to a high efficiency encoded compressed signal, and the high efficiency encoded compressed signal converted by the hard disk video signal converting means to video data in a digital recording format. A digital magnetic recording / reproducing apparatus comprising: a video signal recording means for a magnetic tape, which converts the signal into a signal and records it on a magnetic tape at N times speed. 2. When the video data signal of the digital recording format is recorded on the magnetic tape from the magnetic tape image signal recording means, the frequency of the control signal of the digital recording format is multiplied by N, and the magnetic tape is recorded. 2. A digital magnetic recording / reproducing apparatus according to claim 1, further comprising control signal control means for recording on the recording medium. 3. The control signal recorded on the magnetic tape by the control signal control means is a rotational position signal of a rotary head which is in sliding contact with a track on which a video data signal of the digital recording format of the magnetic tape is recorded. 3. The digital magnetic recording / reproducing apparatus according to claim 2, wherein the recording is performed so that the phase difference between the two becomes 1 / N. 4. The hard disk video signal conversion means comprises a decoder for reproducing a video data signal of a digital recording format recorded in the hard disk and converting the video data signal into a transport stream of a high efficiency encoded compressed image signal. The digital magnetic recording / reproducing apparatus according to claim 1, wherein 5. The video signal recording means for magnetic tape comprises:
An encoder that converts a transport stream of the high-efficiency encoded compressed image signal into a video data signal of a digital recording format, and a plurality of encoders that record the video data signal converted by the encoder according to a recording mode of the digital recording format 2. A digital magnetic recording / reproducing apparatus according to claim 1, further comprising a magnetic head of one kind and a capstan motor means for controlling a traveling speed of the magnetic tape according to a recording mode of the digital recording format. . 6. The plurality of types of magnetic heads include magnetic heads compatible with a plurality of recording and reproducing modes of a digital recording format, and the plurality of types of magnetic heads are selected at appropriate times according to the recording and reproducing modes, and 6. The digital magnetic recording / reproducing apparatus according to claim 5, wherein the capstan motor is controlled to drive the magnetic tape at a traveling speed according to the recording / reproducing mode. 7. The N times the reproduction speed of the video data signal of the digital recording format recorded on the hard disk by the hard disk video signal converting means, and the video data of the digital recording format by the magnetic tape video signal recording means. N times the magnetic tape speed for recording a signal is set by a reproduction speed from the hard disk, a magnetic head used by the plurality of types of magnetic heads at the time of recording on the magnetic tape, and a magnetic tape speed. The digital magnetic recording / reproducing apparatus according to claim 1.