KR970005048Y1 - Variable-speed data recorder - Google Patents

Abstract

No content

Description

Variable speed data recorder

1 is an embodiment of a recording / playback apparatus according to the present invention.

2 is another embodiment of a recording / playback apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: deck drive unit 10a: optical disk

20: RF amplifier 30: signal processing unit

40: system control unit 50: servo unit

60: key input unit 70: display unit

80: divider 90: phase comparison unit

100: filter unit 110: voltage controlled oscillator (VCO)

120: A / D converter 130: D / A converter

140: optical pickup unit 150: regeneration amplifier

160: recording amplifier 170: address amplifier

180: rotation control unit 190: spindle motor

200: frequency signal generating means

The present invention relates to a variable speed data recording and reproducing apparatus in a recording and reproducing apparatus, and more particularly, to a variable speed data recording and reproducing apparatus capable of setting a wide range of a recording material tod speed.

In general, a recording and reproducing apparatus is a device for recording and reproducing information on a magnetic tape or an optical disk, which is a recording medium, and includes a tape recorder, a rotary digital audio tape recorder (R-DAT),

Digital audio tape recorders such as Stationary Digital Audio Tape Recoder (S-DAT), digital audio disc recorders such as Compact Disk Magneto Optical (CD-MO) or Compact Disk Write Once (CW-O) or Mini Disk Play (MDP). For example:

Such a recording and reproducing apparatus records information on a recording medium by a recording method of constant linear velocity.

During reproduction, the motor is controlled to match the reproduction linear velocity with the linear velocity at recording.

However, such a recording and reproducing apparatus is inconvenient that recording and reproducing at various speeds desired by a user can be performed by recording and reproducing only at a prescribed speed.

Accordingly, an object of the present invention is to provide a variable speed data recording and reproducing apparatus which can vary the recording and reproducing speed in order to solve the above problems.

In the variable speed data recording and reproducing apparatus having a system control unit for controlling the system as a whole, a key input unit for inputting a variable control key and a variable speed value, and a servo unit for controlling a tech drive, in order to achieve the above object, the key input unit includes: System control means for switching a variable speed value input by a user and a variable speed information value recorded on a recording medium into a system operating frequency range; and stabilizing the frequency switched by the system control means to a constant phase level. And a frequency signal generating means for generating a signal to the signal processor, and a signal processor for receiving a master clock of a frequency generated by the frequency signal generating means as an input and outputting a timing signal distributed to a predetermined value. Includes a variable speed data recording and reproducing apparatus characterized by It is characterized by.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a recording / playback apparatus according to the present invention, taking a digital audio tape recorder as an example.

In FIG. 1, the deck drive part 10 is a means for driving a tape. The RF amplifier 20 is a data record reproduction amplifier.

The signal processor 30 is a digital signal processor for recording and reproducing.

The system control unit 40 is a means for controlling the system as a whole.

The servo unit 50 inputs signals from the signal processor 30 and the system control unit 40 to control the drum, capstan, and reel motor required for driving the deck driver 10. Output a control signal.

The key input unit 60 is a means for applying a control command and data of a user. In particular, the key input unit 60 includes a variable speed control key and a key for applying a variable speed value.

The display unit 70 displays commands and data applied from the key input unit 60.

The divider 80 divides the master clock inputted into the signal processor 30 into N values.

The phase comparator 90 is a means for comparing the phase difference between the reference frequency output from the system controller 40 and the frequency output from the divider 80.

The filter unit 100 converts the direct current by integrating the phase difference as a low pass filtering means.

The VCO 110 converts a voltage input as a voltage controlled oscillator into a frequency.

An A / D (Analoge / Digital) converter 120 converts an input signal into a digital signal.

The D / A converter 130 converts the digital signal processed by the signal processor 30 into an analog signal.

Next, the operation of the block diagram shown in FIG. 1 will be described.

First, the operation for data recording will be described.

When the variable speed control key is applied from the key input unit 10 and the user sets a desired recording speed value, the value is input to the system control unit 40.

The system controller 40 switches to the reference frequency Verf according to the input recording speed value and outputs it.

The reference frequency output from the system controller 40 is input to the phase comparator 90.

In addition, a frequency obtained by dividing the master clock output from the VCO 110 by N is input to the phase comparator 90.

The phase comparator 90 compares the phases between the input frequencies and outputs the phase difference.

The signal output from the phase comparator 90 is attenuated by the filter unit 100 at a frequency higher than the cutoff frequency or the integrating circuit and is output as a DC voltage.

The VCO 110 converts the input DC voltage into a frequency and outputs the converted DC clock to the master clock of the signal processor 30.

In the divider 80, the value output from the VCO 110 is divided into N and input to the phase comparator 90.

The above-described operation is repeated until the N-divided value coincides with the reference frequency output from the system controller 40 and the frequency output from the VCO 110.

If the reference frequency output from the system control unit 40 and the frequency and phase of the frequency dividing the N output frequency from the VCO 110 coincide with each other, the system control unit 40 uses a recording speed corresponding to the reference frequency according to the variable speed. Control to start a recording operation.

That is, the signal Sin input from the outside is quantized through the A / D converter 120, and the quantized data is converted into a recording standard through the signal processor 30, and at the same time, the system controller 40 provides information about the speed. Is temporarily stored in a memory in the system control unit 40.

The main information processed by the signal processor 30 and the recording speed information stored in the memory in the system controller 40 are recorded on the tape, which is a recording medium, through the RF amplifier 20 and the deck driver 10.

On the other hand, for the above recording operation, the servo unit 50 mounts the tape to the drum in the deck drive unit 10 and controls the capstan and reel motor inside to correspond to the variable speed.

Next, the operation for data reproduction will be described.

When the reproduction operation is described at the default speed during the reproduction, the system controller 40 outputs a reference frequency Vref corresponding to the predetermined speed to operate the system after the master clock is determined.

When the system is running, it reads data from tape, which is a recording medium, and then detects subcode data with information about speed.

The system controller 40 resets the reference frequency Vref according to the detected speed data information.

The reset reference frequency is input to the phase comparator 90 to repeat the operations of the phase comparator 90, the filter unit 100, the VCO 110, and the divider 80 until a stable master clock is generated.

Until this time, the D / A converter 130 is muted.

When a stable master clock occurs, the playback start point is found and playback operation starts.

The data picked up by the deck driver 10 is input to the signal processor 30 through the RF amplifier 20.

The signal processor 30 decodes the data output from the RF amplifier 20, converts the analog signal from the D / A converter 130, and outputs the analog signal.

On the other hand, when a play command is input at a different speed through the key input unit 60, the system controller 40 outputs a reference speed corresponding to the input speed and generates a master clock to the signal processor 30 according to the reference speed. .

Therefore, if the key input is continuously controlled continuously, playback can be performed at the corresponding speed.

2 is a block diagram of an optical disc recording and reproducing system as another embodiment of a variable speed data recording and reproducing apparatus according to the present invention.

Components of FIG. 2 are an optical pickup unit 14 for picking up information recorded on the optical disc 10a, a reproduction amplifier 150 for reproducing and amplifying an optical signal, and a signal processor 30 for recording. Rotation control unit 180 and the optical disk to rotate the address amplifier 170 and the spindle motor 190 for determining the address position of the recording amplifier 160 and the recordable optical disk amplifying the signal processed in the It further comprises a spindle motor 190 for rotating 10a).

The recording operation of the block diagram shown in FIG. 2 is almost the same as the recording operation of FIG. 1, and the difference is recorded on the optical disc 10a through a recording amplifier 160 with a recording head (not illustrated), and the recorded position. Determination is made in the reproduction amplifier 150 and the address amplifier 170.

In addition, in the control of the servo, the optical disk 10a is rotated at a constant speed through the rotation controller 180 and the spindle motor 190 under the control of the servo unit 50, and focusing of the optical pickup unit 140 is performed. ) And tracking and feeding.

As described above, the present invention has the effect that a user can arbitrarily change the recording / playback speed during recording / playback in the recording / playback apparatus so that audio signals can be recorded and reproduced at various system speeds.

Claims (1)

A recording and reproducing apparatus comprising a system control unit 40 for controlling the overall system, a key input unit 60 for inputting a variable control key and a variable speed value, and a servo unit 50 for controlling motor rotation. The system control means 40 for switching the variable speed value input by the user from the input unit 60 and the variable speed information value recorded on the recording medium into the system operating frequency range, and the frequency switched by the system control means 40 A frequency signal generating means (200) for stabilizing at a constant phase level and generating a stable frequency; And a signal processing unit 30 which receives a master clock of a frequency generated by the frequency signal generating unit 200 as an input and outputs a timing signal distributed to a predetermined value to the servo unit 50. Variable speed data recording and reproducing apparatus.