JPH038170A - Dubbing device - Google Patents

Abstract

PURPOSE:To simplify the circuit constitution by selecting and outputting a signal removed with an address signal component by an HPF in an address signal section and transferring it to an optical disk recording device for dubbing. CONSTITUTION:A signal read out by an optical pickup means 2 from an optical disk 1 of an optical disk reproducing device 4 to be dubbed is removed with the address signal component by the HPF 11. Then, this is given by a delay unit 10 a delay in the same amt. as the delay time by the HPF 11, and is inputted to a changeover switch 12 through these units 10 and 11 respectively. Then, the address signal section of a regenerative signal is detected by an address signal detector 9 and inputted to the changeover switch 12, where an output of the HPF 11 in the case of the address signal section and an output of the delay unit 10 in the case of other than the address signal section are selected respectively to be outputted, and are transmitted to the optical disk recording device 8 for dubbing and recorded to the optical disk 7. Consequently, the circuit constitution is simplified, and moreover it is enough for the two optical disk recording and reproducing devices 4 and 8 to perform their synchronized operations by using the same rotary reference signal, and with a simple control.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dubbing device used for optical disc recorders or other disc-shaped media recording devices that record recordable and erasable digital signals.

Conventional technology An example of a recordable optical deynuk is shown in the fourth picture.

As shown in FIG. 4, address signals containing information such as track numbers are recorded in advance on the optical decoder at two diagonal locations, for example. By reproducing the address signal on this disk, the recording and reproducing positions of the two optical DENUC recording and reproducing devices can be controlled, and synchronized operation becomes possible.

Generally, when recording digital signals on the optical disk as described above, recording is performed as shown in FIG. Figure 6a
5 shows a signal to be recorded on the DINUK by superimposing the address signal previously recorded on the DINUK. 6th
As shown in the figure, in the section of the address signal recorded in advance for every % rotation, the address signal and a signal with a different frequency (for example, 6.67 selection) at a single frequency called an ampoule signal are recorded in an overlapping manner. In sections other than address signals, digital data is divided into several sectors (for example, 12 sectors per rotation) and recorded.

The conventional digital dubbing method, as shown in the block diagram in FIG. The digital data read out by the pink-up means 2 from the disk 1 of the original optical decoder playback device 4 is transferred to the decoder 3.
Errors 9 caused by dust or scratches on the disc are corrected, and error-free data is transmitted to the encoder 5 of the optical disc recording device 8 to which data is to be dubbed. Encoder 5 has an error υ correction code and address.

In order to add signals such as a synchronization signal and record on the disk, the data is modulated into serial data and sent to the laser drive circuit 6. The laser drive circuit 6 drives a laser according to an input signal, and performs dubbing by writing the signal onto the optical disc.

Problems to be Solved by the Invention However, in the conventional configuration as described above, a decoder circuit is required in the optical disc playback device that is the dubbing source.
An encoder is required for the optical disc recording device to which data is to be dubbed. Encoders and decoders are comprised of expensive circuits that perform complex operations such as demodulating data, correcting errors, adding synchronization signals, address signals, and adding correction codes.
The dubbing device itself is extremely complex, and input/output is performed on the memory during decoding, error correction, and encoding, resulting in a large time delay between the source optical disc playback device and the destination optical disc recording device. Delayed synchronous operation becomes very complex.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a dubbing device that can perform dubbing with a very simple circuit configuration.

Means for Solving the Problems In order to solve the above-mentioned problems, the dubbing device of the present invention converts information previously recorded on the disk, such as an address signal, from a signal recorded on a day to a high-pass filter, etc. The frequency of the address signal is separated, the address signal is selectively switched and outputted, and the signal is input to the laser drive circuit of the optical disc recording device to be dubbed.
It is configured to perform dubbing recording on an optical disc.

According to the above-described configuration, the present invention separates the frequency of the signal read out by the optical disc reproducing device of the dubbing source using a high-frequency F wave device, etc., and selectively switches the address signal section, thereby generating the address signal. and transmits the signal to the optical disc recording device to which it is to be dubbed.

Since the signal time delay at this time is about several hundred nanoseconds, synchronized operation of the dubbing source optical disk playback device and the dubbing destination optical disk recording device can be performed using the same rotation reference signal, and can be carried out with simple control. be able to.

Embodiment FIG. 1 is a block diagram showing an embodiment of a dubbing apparatus according to the present invention.

In FIG. 1, the signal recorded on the disc 1 read out by the optical pickup means 2 from the optical disc 1 of the optical disc reproducing device 4 as the dubbing source is passed through the high-pass filter 11.
Address signal components (several hundred convex to one wave) are sufficiently removed by this. Further, the delay device 10 provides the same amount of delay as the delay time caused by the high-pass filter 11. These signals are input to each input terminal of the switch 12, respectively.

Further, the address signal section of the reproduced signal is detected by the address signal detector 9 and inputted to the control terminal of the switch 12, and the output of the high-pass filter 11 is sent to the output of the high-pass filter 11 in the address signal section, and to the delay device 10 in other sections of the address signal. Select and output the respective outputs.

Fig. 2a shows the output signal of the pickup means 2, a signal in which the address signal taken from the disk and the ampoule signal are superimposed, and are shown respectively. In case b, there is some noise mixed in at the rising edge and falling edge of the address signal, but this is at a level that poses no problem for the stability of clock reproduction, which is the purpose of the ampoule signal.

The signal from which the address signal has been removed in this manner is transmitted to the laser drive circuit of the optical disc recording device 8 to which dubbing is to be performed, and is recorded on the optical disc. In this case, the signal picked up by the pickup means 2 of the optical disc reproducing device 4 of the dubbing source is processed and processed by the optical disc recording device 8 of the dubbing destination.
The time delay for transmitting the signal to the laser driving circuit is almost solely caused by the transmission delay of the high-frequency converter, and the delay time is approximately several tens of Qn to 1 μm. Therefore,
It is sufficient that the two optical disk recording and reproducing devices are operated synchronously using the same rotation reference signal.

Effects of the Invention As described above, according to the present invention, by replacing only the address signal section with a signal removed by a high-frequency door transducer, it is possible to perform optical dubbing recording with a very simple circuit configuration. The synchronized operation of the optical DENUK recording and reproducing equipment can be performed by very simple control, as it only needs to be moved so that it traces the same address using the same rotational reference signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a dubbing device according to an embodiment of the present invention, FIG. 2 is a waveform diagram of each part of FIG. 1, FIG. 3 is a block diagram of a conventional dubbing device, and FIG. FIG. 5 is a diagram showing the relationship between the address signal of the optical disc and the digital data to be recorded. 1...disc, 4...dubbing source optical disc playback device, 8...-dubbing destination optical disc recording device,
9... Address signal detector, 10... Delay device, 11
...High frequency P wave device, 12 switch.

Claims (1)

[Claims] A second recording and reproducing device that records digital signals on a disk-shaped recording medium on which address signals indicating the positions of guide grooves and the like are recorded in advance, and operates synchronously while reproducing the recorded disk with the first recording and reproducing device. In a dubbing/recording device, the reproduction original signal read out from the optical pickup of the first recording/reproduction device is input to a high-pass filter, and only the section in which the address signal is recorded is selectively switched with the reproduction original signal. A dubbing device that outputs a signal and inputs it to a laser drive circuit of a second recording/reproducing device to record it on a disc.