JPH0481831B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a playback/recording device that combines a disk playback device such as a compact disk (CD) player and a magnetic tape recording device (tape recorder). be.

[Conventional technology]

Compact discs (hereinafter referred to as CDs) and their players are well known, for example, from "Compact Disc Reader" published by Ohmsha and written by Heitaro Nakajima. A CD player converts a digital signal into an analog signal and outputs it, so if a tape recorder is connected to the CD player, the contents of the CD can be recorded in analog on magnetic tape.

[Problem that the invention seeks to solve]

By the way, when transferring the recorded contents of a CD to a magnetic tape, turn the tape recorder forward (forward direction).
It may not be possible to transfer all of the contents of a CD to magnetic tape simply by running it. in this case,
If the tape recorder is configured with an auto-reverse system, it is possible to record the contents of a CD while running in reverse (reverse direction). However, reversing the running direction of the magnetic tape and switching the position or connection of the recording head cannot be accomplished instantaneously, and switching time is required. Therefore, a recording loss (sound dropout) corresponding to the switching time occurs.

[Means for solving problems]

The present invention for solving the above-mentioned problems is as follows:
A disk playback device that reads digital signals from a recorded disk in which analog signals are converted to digital signals, converts the digital signals to analog signals, and outputs the same; and a disk playback device that runs the magnetic tape in both forward and reverse directions. and a magnetic head that faces the magnetic tape to generate a forward recording track on the magnetic tape when the magnetic tape is running forward, and to generate a forward recording track on the magnetic tape when the magnetic tape is running reversely. a magnetic recording circuit configured to generate a reverse recording track and connected to the disk playback device so as to record an analog signal obtained from the disk playback device; and a recording area termination in forward running of the magnetic tape. a tape end detection device that detects the end of the magnetic tape; a switching device that switches the running direction of the magnetic tape from forward to reverse in response to the end detection output from the end detection device and switches recording tracks; and a switching device that switches the running direction of the magnetic tape from forward to reverse and switches the recording track; a reverse recording start signal generation circuit for obtaining a signal indicating that recording in reverse has become substantially possible by switching the direction and/or recording track; The present invention relates to a playback/recording device comprising a control circuit that controls the playback device to a pause state, releases the pause state in response to the reverse recording start signal, and controls the disk playback device to a play state. .

[Effect]

In the above invention, the disk reproducing device enters a pause state in response to the end of forward running of the magnetic tape, and when recording becomes possible in reverse run, the pause state is canceled and the play state is entered. Therefore, it is possible to automatically and easily prevent the contents from being lost when recording the contents of the disk across the forward and reverse directions of the magnetic tape.

〔Example〕

Next, referring to the drawings, we will explain embodiments of the present invention.
A combination device of a CD player and a tape recorder will be described.

In FIG. 1, a CD player 1 shown surrounded by a dotted line uses a well-known CD 2 to obtain an audio output. On this CD 2, an audio signal (analog signal) is converted into a digital signal and recorded in the form of a spiral track. Note that this digital signal is EFM (Eight to
Fourteen Modulation).

3 is a disk rotation device, which controls and drives the rotation of the CD 2. Reference numeral 4 denotes an optical head or pick-up, which is a device for reading the optical pits of the CD 2 with a laser beam. Note that a rotating mirror is disposed in the optical head 4, which performs tracking control and jumping control of the light beam. 5
is a feeding device for feeding the optical head 4 in the radial direction of the CD 2. 6 is an amplification and EFM demodulation circuit which amplifies the read output obtained from the head 4 and then returns the EFM signal (14 bits) to the original signal (8 bits). 7 is a digital signal processing circuit, and an amplification and EFM demodulation circuit 6
This circuit performs error correction of the 8-bit signal obtained from the 8-bit signal, separation of the main digital signal and the sub-digital signal (subcode), etc. Reference numeral 8 denotes a digital-to-analog converter, which converts the main digital signal obtained from the digital signal processing circuit 7 into an audio signal (analog signal) and sends it to the output terminal 9.

10 is a CPU, that is, a microcomputer,
It performs various controls of the CD player 1.
This microcomputer 10 has a memory 1
1, operation unit 12, and digital signal processing circuit 7
A sub digital signal line 13 is connected thereto, and a tape recorder side microcomputer 14 is also connected thereto. The microcomputer 10 is
This is for reading the sub digital signal (sub code) recorded on the CD 2 and obtaining various modes designated by the operation section 12. Therefore,
The output of the microcomputer 10 is supplied to a rotating device 3, a head 4, and a feeding device 5. Furthermore, the CD side microcomputer 10 is
In order to correlate the CD player 1 and the tape recorder, it is connected to a microcomputer 14 on the tape recorder side.

The tape recorder on the right side of the drawing has a pair of reels 1
5, 16, a pair of capstans 18, 19 for running the tape 17 forward and reverse, a pair of pinch rollers 20, 21, reels 15, 16, and capstans 18, 19 are driven. motor 22,2
It has a known tape running device consisting of 3 and 24 tapes. The tape recorder also includes a known recording circuit including a recording signal input terminal 25, a recording amplifier 26, and a recording head 27, and a reproduction circuit (not shown).
has. The output terminal of the D/A converter 8 of the CD player 1 is connected to the input terminal of a recording amplifier 26 via a switch 28.

29 is an auto-reverse switching device;
The reverse play state is set in response to the detection of the end of forward driving. More specifically, the first capstan 18 and the first pinch roller 20 are used for forward running of the tape 17, and the second capstan 18 and second pinch roller 21 are used for reverse running. Therefore, the switching device 29 causes the first pinch roller 20 to roll into contact with the first capstan 18 during forward running, and causes the second pinch roller 20 to contact the first capstan 18.
1 is separated from the second capstan 18. When traveling in reverse, the second pinch roller 21
is brought into rolling contact with the second capstan 18, and the first pinch roller 20 is separated from the first capstan 18. This auto-reverse switching device 29 further rotates the magnetic head 27 to switch recording tracks. That is, the position of the magnetic head 27 is changed from the first and second forward tracks to the third and fourth reverse tracks in stereo recording and reproduction. Instead of rotating the magnetic head 27, it is also possible to adopt a method in which the magnetic head 27 is moved up and down, or a method in which four channels of magnetic heads are arranged corresponding to four tracks and the heads are switched using an electric circuit. .

Reference numeral 30 denotes a tape end detection device, which in this example is composed of an optical sensor that optically detects the end of a light-transmitting tape that continues to the end of the recording area of the cassette tape 17.
and a light source 30b arranged opposite to each other via 7. The output shown in FIG. 2A is obtained from the light receiving element 30a in response to passage of the end of the light-transmitting tape. 31 is a termination detection circuit, and the light receiving element 30a
In response to the detection output of the second
This is a circuit that generates the termination detection signal in Figure B. 32
2 is a reverse recording start signal generating circuit, which generates the reverse recording start signal shown in FIG. 2C in synchronization with the falling edge of the pulse shown in FIG. 2A based on the detection output of the light receiving element 30a. Termination detection circuit 31
The reverse recording start signal generation circuit 32 is connected to the microcomputer 14.

The microcomputer 14 includes a memory 3 for storing sub digital signals (subcodes), etc.
2 and the operating section 33 are connected. Operation unit 33
are used to give various commands to the microcomputer 14. The microcomputer 14 is
In response to the termination detection signal obtained from the termination detection circuit 31, a signal for activating the auto-reverse switching device 29 is output, and the CD player 1
CD is the signal that controls the pause (pause) state.
The data is sent to the microcomputer 10 on the side. In addition, in response to the output of the reverse recording start signal generation circuit 32, which is generated in response to the completion of switching from forward running to reverse running by the auto-reverse switching device 29, the microcomputer 14 controls the CD-side microcomputer 14. computer 10
A signal is sent to the player to cancel the pause (pause), that is, to start play. Note that the microcomputer 14 controls the motors 22, 23, 2 in order to execute various controls.
It is also connected to the control circuit 35 of No. 4.

(Operation) Next, the operation of this device will be explained. First, the CD
When the user wants to transfer the recorded contents of No. 2 to the tape 17, the dubbing operation button provided on the operation section 34 is operated. This turns on the switch 28,
The CD player 1 and the tape recorder are electrically connected, and furthermore, the CD player 1 is in a play state, and the tape recorder is in a forward recording state. As a result, the digital signal read from the CD 2 is converted into an analog signal and recorded on the tape 17 by the magnetic head 27, producing a forward recording track. Thereafter, even though the playback of the CD 2 has not yet been completed, when the forward running recording area of the tape 17 reaches the end, the end of the optically transparent tape (leader tape) is located at the sensor 30, and the tape 17 is moved forward. The detection output shown in Figure 2A is generated. The leading edge of the detection output in FIG. 2A corresponds to the boundary between the magnetic tape and the leader tape. Figure 2A
2B from the termination detection circuit 31 based on the waveform of
When this signal is generated, the auto-reverse switching device 29 is activated and the CD player 1 is brought into a paused state. As a result, the tape 17 runs slightly forward at the leader tape portion, and then
Start driving in reverse. On the other hand, in the CD player 1, the scanning position by the beam is substantially fixed because the CD player 1 is controlled to be temporarily stopped. tape 17
When the tape starts running in reverse, the leader tape section immediately ends and becomes the magnetic tape section. As a result, the reverse recording start signal (switching completion signal) shown in FIG. enters the play state, beam scanning of the next track following the beam scanning position at the start of the pause state starts, and a reproduced audio signal is recorded on the tape 17 running in reverse.

(Modifications) The present invention is not limited to the above-described embodiments, but can be modified. For example, it is also applicable to the case where the tape is run both forward and reverse using a single capstan and pinch roller. It is also applicable to cases where a capacitive disc player or a piezoelectric disc player is combined with a tape recorder. In addition, microcomputers 10, 14 and memories 11, 3
It is also possible to use only one of 3 and to share it with the CD player and the tape recorder. Also,
The reverse recording start signal (switching completion signal) may be generated by a switch responsive to track switching of the magnetic head 27. Also, if the auto reverse switching time is almost constant, the third
The monostable multivibrator may be triggered at the leading edge of end detection shown in Figure A to generate a pulse corresponding to the switching time shown in Figure 3B, and this trailing edge may be used as the reverse recording start point (switching completion point). .

〔Effect of the invention〕

As is clear from the above, it is possible to easily prevent information content from being lost when switching from forward driving to reverse driving.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the principle of a combination device of a CD player and tape recorder according to an embodiment of the present invention, and FIG. 2 is a waveform diagram of each part of FIG. 1.
FIG. 3 is a waveform diagram of each part of the modified example. 1...CD player, 2...CD, 8...D/A
Converter, 10, 14... microcomputer,
11, 33...Memory, 17...Magnetic tape, 2
7...Magnetic head, 29...Auto reverse switching device, 30...Tape end detection device, 31
. . . End detection circuit, 32 . . . Recording start signal generation circuit.

Claims (1)

[Scope of Claims] 1. A disk playback device that reads digital signals from a disk on which analog signals are converted to digital signals, converts the digital signals to analog signals, and outputs the converted signals; and a disk playback device that forwards a magnetic tape. and a magnetic head that faces the magnetic tape, and generates a forward recording track on the magnetic tape when the magnetic tape runs forward, thereby recording the magnetic tape. a magnetic recording circuit configured to generate a reverse recording track on the magnetic tape during reverse running, and connected to the disk playback device so as to record an analog signal obtained from the disk playback device; and the magnetic tape. a tape end detection device for detecting the end of a recording area during forward running of the magnetic tape; and a switching device for switching the running direction of the magnetic tape from forward to reverse and switching recording tracks in response to the end detection output from the end detection device. , the tape running direction and/or by the switching device;
or a reverse recording start signal generation circuit for obtaining a signal indicating that recording in reverse has become substantially possible by switching recording tracks; A reproducing/recording device comprising: a control circuit that controls the disk reproducing device to be in a paused state, and in response to the reverse recording start signal, cancels the paused state and controls the disc reproducing device to be in a play state. 2. The magnetic tape has a magnetic recording area having a first light reflection or light transmission characteristic and a tape end having a second light reflection or light transmission characteristic, and the end detection device has a magnetic recording area having a first light reflection or light transmission characteristic. an optical sensor disposed near the magnetic head to detect the end of the tape by utilizing a difference between a light reflection or light transmission characteristic and the second light reflection or light transmission characteristic; 2. The reproducing/recording apparatus according to claim 1, wherein the signal generating circuit is a circuit for detecting the point of transition from the end of the tape to the magnetic recording area based on the output of the optical sensor. 3. The magnetic head is configured to be movable from a forward recording track to a reverse recording track, and the reverse recording start signal generation circuit detects completion of movement of the magnetic head from the forward recording track to the reverse recording track. The reproducing/recording apparatus according to claim 1, which is a circuit for performing.