JPH01245462A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable the correct recording of a disk reproducing signal by letting the driving speed of a recording medium to control the cycle of a clock signal and allowing the rotary speed of a disk corresponding with the driving speed of the recording medium. CONSTITUTION:The traveling speed of a tape is detected by a tape traveling speed detecting part 19 at a cassette tape recorder 18 side and the detection result thereof is output to a CD player 21 by converting it into the variation in a voltage level by a voltage converting circuit 20. At the CD player 21 side this voltage level is fed to a clock generation circuit 23 after subjecting to level adjusting by a level adjusting circuit 22 and a disk rotary driving system 24 is controlled based on the system clock to be output. The reproducing speed of a disk is varied by following up to the variation of the tape traveling speed and the disk reproducing speed and tape traveling speed thus correspond with. The disk reproducing signal can thus be correctly recorded on a tape with simple structure.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) This invention provides a method for using information signals obtained by reproducing a disc.
This invention relates to an improvement in a recording/reproducing device for recording onto other recording media.

(Prior Art) As is well known, when an analog information signal such as music played by a CD (compact disc) player is recorded on tape by a cassette tape recorder, the playback speed of the CD player and the running speed of the tape are must be constant.

In this case, the playback speed, that is, the rotational speed of the disc, of the CD player is maintained with high precision by a system clock controlled at a constant cycle by a PLL (phase locked loop) circuit. Therefore, variations in tape running speed are more noticeable than variations in playback speed of CD players.

Therefore, in the past, the cassette tape recorder side had to stabilize the tape running speed on its own, or the system clock of the CD player was used to keep the tape running speed constant. is considered.

FIG. 2 shows a conventional recording and reproducing apparatus that uses the system clock of a CD player to stabilize the tape running speed. First, on the CD player 11 side, the disk rotation drive system 13 is controlled based on the system clock output from the clock generation circuit 12 so that the disk playback speed is constant.

In addition, in the cassette tape recorder 14 (ill), the tape running speed is detected by a tape running speed detection section 15, and the tape drive system 17 is controlled by a servo circuit 16 that is synchronized with the system clock obtained from the CD player 11. The tape running speed is kept constant.

However, in such a conventional recording and reproducing device, it is necessary to install the servo circuit 16 on the cassette tape recorder 14 side, which makes the configuration difficult. ! This causes problems such as the formation of pheasants and increase in size, as well as being economically disadvantageous.

(Problems to be Solved by the Invention) As described above, in the conventional recording and reproducing apparatus, a servo means for controlling the driving speed of the recording medium is installed in the recording system that records the reproduction signal from the disk reproduction system. This has the problem of complicating the structure and increasing the size, which is also economically disadvantageous.

Therefore, the present invention was made in consideration of the above circumstances, and it is possible to accurately record the disc playback signal by making the disc playback speed correspond to the drive speed of the recording medium for recording the disc playback signal with a simple configuration. The purpose is to provide an extremely good recording and reproducing device.

[Structure 1 of the Invention (Means for Solving the Problems) In other words, the recording and reproducing apparatus according to the present invention controls the rotational speed of a disk based on a clock signal controlled at a constant cycle, and records data on the disk. The object of the present invention is to provide a disc reproducing system that reproduces information recorded on a disc, and a recording system that records information signals reproduced by the disc reproducing system on a recording medium to be driven.

The drive speed of the recording medium is detected and the period of the clock signal is controlled based on the detected output, so that the rotational speed of the disk corresponds to the drive speed of the recording medium.

(Function) According to the above configuration, the rotational speed of the disk is made to correspond to the driving speed of the recording medium by controlling the period of the clock signal based on the detection result of the driving speed of the recording medium. It is no longer necessary to provide a servo means or the like in the recording system as in the prior art, and it is possible to match the disc playback speed and the drive speed of the recording medium with a simple configuration, and accurately record the disc playback signal.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In FIG. 1, on the cassette tape recorder 18 side, the tape running speed is detected by a tape running speed detection section 19, and the detection result is sent to a voltage conversion circuit 20.
The voltage is converted into a change in voltage level and output to the CD player 21.

On the CD player 21 side, the cassette tape recorder 18
The voltage level corresponding to the tape running speed outputted from the tape is adjusted in level by a level adjustment circuit 22 and then supplied to a clock generation circuit 23. This clock generation circuit 2
3 generates a system clock having a period corresponding to the voltage level output from the level adjustment circuit 21.

The disk rotation drive system 24 is controlled based on the system clock output from the clock generation circuit 23.

According to the above configuration, for example, when the running speed of the tape decreases, the output voltage level of the voltage conversion circuit 20 decreases, the frequency of the system clock output from the clock generation circuit 23 decreases, and the rotational speed of the disk decreases. decreases. Furthermore, when the running speed of the tape increases, the output voltage level of the voltage conversion circuit 20 increases, the frequency of the system clock increases, and the rotational speed of the disk increases.

Therefore, according to the configuration as in the above actual flow example, the disk playback speed and tape running speed are made to correspond by changing the disk playback speed in accordance with fluctuations in the tape running speed. It is not necessary to install a servo means or the like on the cassette tape recorder 18 side as in the conventional case, and the disc playback signal can be accurately recorded on the tape with a simple configuration, which is economically advantageous.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As described in detail above, according to the present invention, the disk playback speed and the drive speed of the recording medium for recording the f-isk playback signal can be made to correspond with each other with a simple configuration, and the disk playback signal can be accurately recorded. It is possible to provide an extremely good recording and reproducing device that can perform the following operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a recording and reproducing apparatus according to the present invention, and FIG. 2 is a block diagram showing a conventional recording and reproducing apparatus. DESCRIPTION OF SYMBOLS 11... CD player, 12... Clock generation circuit, 13... Disk rotation drive system, 14... Cassette tape recorder, 15... Tape running speed detection section, 1
6... Servo circuit, 17... Tape drive system, 18.
...Cassette tape recorder, 19...Tape running speed detection unit, 20...Voltage conversion circuit, 21...CD player, 22...Level adjustment circuit, 23...Clock generation circuit, 24...・Disk rotation drive system.

Claims (1)

[Claims] A disk playback system that plays back information recorded on the disk by controlling the rotational speed of the disk based on a clock signal controlled at a constant cycle, and a recording medium that drives the information signal played back by this disk playback system. A recording and reproducing apparatus equipped with a recording system for recording, comprising a detection means for detecting a driving speed of the recording medium, and a control means for controlling the period of the clock signal based on the detection output of the detection means, A recording/reproducing apparatus characterized in that the rotational speed of the disk is configured to correspond to the driving speed of the recording medium.