JPH0458673B2 - - 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 an analog magnetic tape recording device (tape recorder). It is.

[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. An index of the contents of the disc is recorded in the lead-in part of the CD. Therefore, recorded information (songs) can be searched quickly.

[Problem that the invention seeks to solve]

By the way, there are cases where it is desired to record songs recorded on a CD onto a magnetic tape. In this case, if you connect the CD player's audio output terminal to the tape recorder's audio input terminal, the magnetic tape will be recorded.
CD songs can be recorded. However, the index signal recorded on a CD, ie, a sub-digital signal called a subcode, cannot be recorded on a magnetic tape. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a reproducing/recording device that can record on a magnetic tape not only an analog signal corresponding to the main digital signal recorded on a disk, but also a sub-digital signal indicating an index. .

[Means for solving problems]

In order to achieve the above-mentioned objects, the present invention has a main digital signal corresponding to an analog signal recorded therein, and a sub digital signal indicating an index of the analog signal on a track preceding the recording track of the main digital signal. a disk playback device that reads the main digital signal and the sub digital signal from a recording disk on which signals are recorded, converts the main digital signal into an analog signal and outputs the same; a magnetic tape running device; and the magnetic tape running device. a recording circuit for recording a magnetic tape signal run by the device; a memory for temporarily recording the sub-digital signal obtained from the disk reproducing device; and a modulator for modulating the sub-digital signal read from the memory. and a switch for selectively inputting a modulated wave of the sub digital signal obtained from the modulator and an analog signal corresponding to the main digital signal obtained from the disk playback device to the recording circuit. This relates to recording devices.

[Effect]

In the above invention, the auxiliary digital signal obtained from the disc playback device is temporarily stored in the memory. Since the memory has a time axis adjustment function, it is possible to output the sub digital signal at a speed suitable for recording the sub digital signal on the magnetic tape. The auxiliary digital signal read from the memory is modulated and recorded on the magnetic tape. After recording the sub digital signal on the magnetic tape, if an analog signal corresponding to the main digital signal obtained from the disk playback device is supplied to the recording circuit of the magnetic tape, the magnetic tape on which both the sub digital signal and the analog signal are recorded. You will get a tape.

〔Example〕

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

In the drawing, a CD player 1 shown surrounded by a dotted line uses a well-known CD 2 to obtain an audio output. In this CD2, the main digital signal corresponding to the audio signal (analog signal) is recorded in a spiral track form, and the audio signal is recorded at the track position (lead-in part) before the recording track position of the main digital signal. A sub-digital signal indicating an index is recorded. Note that the sub digital signal includes at least a signal indicating the positions of songs that are sequentially recorded (for example, a signal indicating which song, minute, second, and frame the song starts from). Such sub digital signals and main digital signals are
Recorded using EFM (Eight to Fourteen Modulation).

3 is a disk rotation device, which controls and drives the rotation of the CD 2. 4 is an optical head, which is a device for reading the optical pits of 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 the optical head 4
This is a feeding device for feeding CD2 in the radial direction.
6 is an amplification and EFM demodulation circuit which amplifies the read output obtained from head 4 and then
This is a circuit that returns the EFM signal (14 bits) to the original signal (8 bits). 7 is a digital signal processing circuit, and 8 obtained from the amplification and EFM demodulation circuit 6
This circuit performs error correction of bit signals, separation of sub digital signals and main digital signals, 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
The index sub-digital signal (sub-code) recorded in the lead-in portion of the CD 2 is read, and the sub-digital signal (sub-code) containing address information recorded in each frame is read, Set the selected mode. Therefore, the output of the microcomputer 10 is supplied to the rotating device 3, the head 4, the feeding device 5, etc., for example, searching for a desired address (song),
Used to control stop, fast forward, etc. Furthermore, CD
According to the present invention, the side microcomputer 10 includes:
The index sub-digital signal of the lead-in portion is supplied to the tape recorder side microcomputer 14. Further, the microcomputer 10 is
The CD player 1 is controlled in a pause mode in synchronization with the completion of reading of the index sub-digital signal, and the CD player 1 is controlled to release the pause in synchronization with the completion of recording of the index sub-digital signal in the tape recorder. .

The tape recorder on the right side of the drawing has a pair of reels 1
A known tape running device includes a magnetic tape 17 hung on a magnetic tape 17, a pinch roller 18 and a capstan 19 for running the tape 17, and motors 20, 21, 22 for driving the reels 15, 16 and the capstan 19. have The tape recorder also has a known recording circuit consisting of a recording signal input terminal 22, a recording amplifier 23, and a recording head 24, and a known recording circuit consisting of a reproduction head 25, a head amplifier 26, an output amplifier 27, and an output terminal 28. It has a reproducing circuit, and further has a control system consisting of a microcomputer 14, a memory 29, an operation section 30, and a motor control circuit 31a.

31 is a frequency modulator, which is provided according to the present invention. To explain this in detail,
The index sub digital signal obtained from the CD side microcomputer 10 is sent to the memory 29 via the tape recorder side microcomputer 14.
will be written to. The microcomputer 14 is
The index sub-digital signal written in the memory 29 is read out at a speed corresponding to the recording speed of the tape recorder and supplied to the modulator 31. The modulator 31 converts the index sub-digital signal into
For example, modulation is performed so that frequency ₁ in the inaudible frequency band corresponds to logic "1" and frequency ₂ corresponds to logic "0".

32 is a switch provided according to the present invention, which connects the output of the modulator 31 and the D/A of the CD player 1.
The output of the converter 8 is selectively connected to the recording amplifier 23. This switch 32 is controlled by the microcomputer 14, and connects the modulator 31 to the recording amplifier 23 only during the period when the index sub-digital signal is recorded on the tape 17, and releases the pause state of the CD player 1 after the recording is completed. The D/A converter 8 is connected to the recording amplifier 23 in synchronization with the recording amplifier 23.

33 is an FM demodulator, which is provided between the head amplifier 26 and the microcomputer 14. This demodulator 33 is used to record the tape 1 during playback mode.
The index sub digital signal obtained from the starting end of 7 is FM demodulated and sent to the microcomputer 1.
4 to the memory 29. A linear counter 34 generates a signal indicating the amount of travel of the tape 17 based on the operation of the tape travel device.

(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 12 is operated. As a result, the CD player 1 enters the playback state and starts reading the index sub-digital signal recorded at the beginning of the track on the CD 2, which is transferred to the memory 2 on the tape recorder side.
9 is written. When the reading and writing of the index sub digital signal is completed, the microcomputer 10 generates a pause command and the CD
Player 1 enters a pause state. The microcomputer 14 on the tape recorder side also executes dubbing mode control in response to the dubbing operation of the operating section 12. That is, first, the index sub digital signal is written into the memory 29, and at the same time the switch 32 is
Turn on contact b. Then, the index sub digital signal is read out from the memory 29, FM modulated by the modulator 31, and recorded on the tape 17. When the recording of this sub-index digital signal is completed, the microcomputer 14 generates a control signal to turn on contact a of the switch 32, and also generates a pause release signal for the CD player 1, and the CD player 1 records the main digital signal. Reproduction is started, and an audio signal is obtained from the D/A converter 8, which is supplied to the recording head 24 via the switch 32 and the amplifier 23, and the audio signal is recorded on the tape 17 in analog form.

When the tape 17 on which the index sub-digital signal and the audio signal are recorded is used for reproduction, the index sub-digital signal is first reproduced, FM demodulated and written into the memory 29. Thereafter, if the user wishes to search for and reproduce a desired song, the user specifies the number of the desired song using the operation unit 30. As a result, the time information (address) of the desired song based on the index sub-digital signal written in the memory 29 is read out and compared with the output of the linear counter 34. That is, in response to the search operation, the tape 17 enters a high-speed feeding state, and the linear counter 34 detects the amount of tape travel from the beginning of the tape. When the microcomputer 14 detects a match between the time information (desired address) of the desired song and the traveling distance information (detected address) obtained from the linear counter 34, high-speed forwarding is canceled, playback by normal forwarding starts, and the output terminal Audio output is obtained from 28.

(Modifications) The present invention is not limited to the above-described embodiments, but can be modified. For example, it is also applicable to a case where a capacitive disk player or a piezoelectric disk player is combined with a tape recorder. Furthermore, the modulator 31 may be replaced with one that makes the frequency zero in response to logic "0" and sends out a frequency signal (carrier) only in response to logic "1", that is, what is called analog AM or ASK modulation. Good too. In addition, microcomputer 1
0, 14 and memories 11, 29 may be used in common by a CD player and a tape recorder. In addition, the tape running device
It may also be used as a rotating head type tape running device for a VTR.

〔Effect of the invention〕

As is clear from the above, according to the present invention, not only the analog signal corresponding to the main digital signal obtained from the disk playback device is recorded on the tape, but also the index sub-digital signal is modulated and recorded on the magnetic tape. It is possible to provide a magnetic tape that is easy to use. Incidentally, since the index sub-digital signal is modulated and recorded, it can be easily distinguished from the analog signal.

[Brief explanation of the drawing]

The drawing is a block diagram showing the principle of a combination device of a CD player and a tape recorder according to an embodiment of the present invention. 1...CD player, 2...CD, 8...D/A
Converter, 10, 14... microcomputer,
11, 29...Memory, 17...Magnetic tape, 3
1...Modulator, 32...Switch.

Claims (1)

[Scope of Claims] 1. A main digital signal corresponding to the analog signal is recorded, and a sub digital signal indicating an index of the analog signal is recorded on a track before the recording track of the main digital signal. a disk playback device that reads the main digital signal and the sub digital signal from a recording disk, converts the main digital signal into an analog signal, and outputs it; a magnetic tape running device; and a magnetic tape running with the magnetic tape running device. a recording circuit for recording a signal on a tape; a memory for temporarily recording the sub-digital signal obtained from the disk playback device; a modulator for modulating the sub-digital signal read from the memory; and a modulator for modulating the sub-digital signal read from the memory. a switch for selectively inputting into the recording circuit a modulated wave of the sub digital signal obtained from the disc playback device and an analog signal corresponding to the main digital signal obtained from the disk playback device;
A reproducing/recording device equipped with.