JPS6130330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deplicator, and more particularly to a deplicator device for dubbing information from a disc.

Conventionally, magnetic tape deplicator devices use endless tape as a master player,
In general, a tape recorded at the normal tape speed of 19.05cm/s is played back at 16x or 32x high speed, and then recorded using a slave tape recorder corresponding to the tape speed. was increasing.

FIG. 1 is a block diagram of a tape deplicator system. A is _a tape type endless master reproducing _machine , B ₁ , B ₂ , _{B 3} .

With conventional endless master playback machines, when the tape speed is increased 32 times, the speed reaches 609 cm/sec, and the tape is easily damaged due to air resistance and sliding resistance, and discharge noise due to static electricity, etc. Because the tape is recorded on itself, if the master tape, scrape tape, or manufactured tape becomes defective, or if the endless tape becomes stuck to the guide or bottom plate of the tape running system due to the attraction force of static electricity, Not only are expensive master tapes cut into pieces and become unusable, but slave recorder tapes are also produced with defective products.
It contained problems that could cause significant damage. Also, since master tapes are produced by recording back and forth, the contents of the completed master tape cannot be changed, and there is the inconvenience of having to make a new master tape each time. Since it was necessary to create and keep a spare master tape, there was a problem of great effort and expense.

The present invention provides a deplicator device that eliminates the above-mentioned drawbacks, and is characterized in that it reproduces a first recording disk on which a round trip signal is recorded and a second recording disk on which a decoupling signal is recorded. The present invention relates to a deplicator device which is disposed in a magnetic recording/reproducing device and is configured to simultaneously record reciprocating tracks in a magnetic recording/reproducing device by reproducing a first recording disk in a forward direction and reproducing a second recording disk in a reverse direction.

An embodiment of the present invention will be described below using pulse coat modulation (P.
CM) Detailed information about digital disks. PC
Recording by magnetic, optical, and mechanical means has already been applied as a recording medium for M digital signals. Optical recording and reproducing including optical laser light is an excellent means of sampling analog signals by A-D conversion and recording quantized signals at high density, but the mechanism involved in recording and reproducing is Technically, a considerable degree of precision is required since this is performed without contacting the medium, but it is now possible to put it into practical use due to the miniaturization of the mass of the reproduction detection head and advances in servo technology. FIG. 3 is an explanatory diagram of the configuration of the master reproducing machine of the present invention, and FIG. 4 is a diagram showing a PCM optical disc. As an example, if the diameter of the optical disk is 30 mm and the amount of recorded information is determined, the sampling frequency is 47.25 KHZ, the quantization number is 16 bits stereo, two channels, and the recording time is 30 mm.
The amount of information is 2.716×10 ⁹ bits. or
If it is 60 minutes, the amount of information will be approximately 5.4432 x 10 ⁹ bits. Assuming this amount of information is the innermost diameter of 240mm, the outermost diameter is 280mm and the width of the recording band is approximately 25mm.
It is possible to record to a certain degree. The rotation speed at this time is approximately 200 RPM. This recorded disk
To play at 16x, it will be approximately 3.200rPm, and
When played at 32x, the speed is 6.400 RPM. Since the width of the recording band of the PCM signal is about 25 mm, the time it takes to move the playback detection head on a 30mm disc record (from the beginning to the end of recording) is about 0.1 seconds, and the end of the playback signal is detected. It is technically possible to move from that position to the playback start position and repeat the playback again. Also, during this time, the blank recording feed tape length of the slave recorder was set as a cassette.
It is about 0.15mm. Therefore, by recording the cue signal on the PCM optical disk, it is possible to easily return the playback detection head to the starting position for playback using the driving force of the linear motor. In order to achieve the above-described structure, the present invention has two optical disks coaxially connected with one driving force as shown in the explanatory diagram of FIG.
One side of the optical disk that rotates in the forward direction sequentially plays back the recorded signal tracks, and the other optical disk sequentially plays the recorded tracks in the opposite direction, and performs digital-to-analog (D-A) conversion on each side. The device converts the signal into an analog signal and serves the same purpose as a master tape recorder.

To explain the figures, 1 and 1' in Fig. 3 are optical disks, 3 and 3' are optical disk center holes 4 and 4' are clampers 5 and 4, respectively, which fix the optical disk to a disk fixing plate (turntable). 5' is a fixed plate. 6 is a motor with driving force. Although not shown, it goes without saying that the motor is rotated at a constant speed by a servo mechanism. A rotor 7 holds the disk fixing plate and rotates as a unit. Reference numerals 8 and 8' indicate axes for narrowing the ends of the rotor and fitting and fixing the clampers for fixing the optical disk. Reference numerals 9 and 9' denote optical signal detection heads for reproducing optical discs, which have a servo function by detecting the amount of light and are always adjusted to the best position. Reference numerals 12 and 12' are light condensing or converging optical paths. Reference numerals 10 and 10' refer to a mechanism for servoing the movement of the detection head on the track according to the amount of reflected light of the recording signal.

Since the present invention is configured as described above, by rotating the motor 6, the optical disk 1' reproduces information from the inner circumference 2', and the optical disk 1 reproduces information from the outer circumference 2'.
Slave recorder tape T for better playback
By combining the reciprocating signals DT as shown in FIG. 5, dubbing can be performed simultaneously from the reproduction start position S.

That is, recording of the left and right channels on the outbound route D starts from the beginning part using the optical disc 1, and recording of the left and right channels on the return route R starts simultaneously from the last part.

As can be easily seen from FIG. 3, the present invention is designed to simultaneously record the back and forth tracks of a stereo signal on a slave recorder as a deplicator master playback device, so that one optical disk is set in the forward direction and the other is set in the reverse direction. It has the ability to play back in different directions, and by arbitrarily changing the optical disk on one side, the content to be recorded back and forth on the slave recorder can be easily rearranged as desired, so it can be used like a conventional master tape. There is no need to go through the trouble of recording back and forth. It can also be configured vertically for playback on the same axis.
Since it is a disk, it has the advantage that it can be made smaller, and it is a highly productive and stable method, which has great effects. In the above embodiment, one unit is used for master playback, but it is easy to provide a plurality of units and select songs by random access.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional deplicator device, FIG. 2 is a tape plan view showing a track during reciprocating recording or playback, FIG. 3 is a schematic diagram of the deplicator device of the present invention, and FIG. FIG. 5 is a plan view of the optical disk used in the invention, and FIG. 5 is a plan view of a tape track for explaining the dubbing method of the invention. 1 and 1' are optical disks, 6 is a motor, 9 and 9' are detection heads, and 11 and 11' are servo mechanisms.

Claims (1)

[Claims] 1 a first recording disk on which an outgoing signal is recorded;
A second recording disk on which the recovered signal is recorded is placed in a disk reproducing device, and the first recording disk is reproduced in the forward direction, and the second recording disk is reproduced in the reverse direction to create a scrap tape in the magnetic recording and reproducing device. A deplicator device characterized by simultaneously recording reciprocating tracks.