JPH03161826A - Disk type recording and reproducing device - Google Patents

Abstract

PURPOSE:To continuously execute recording operation by using a buffer memory with small capacity by controlling the rotation of a disk or the speed of signal processing, etc., in accordance with the transfer state of data sent from an external part and accumulation data stored in a buffer memory. CONSTITUTION:A controller 9 consists of a microcomputer and has a function for controlling the operations of a servo circuit 5, an interface 6, a buffer memory 7, a signal processing circuit 8, and so on. The control function includes functions for detecting the transfer state of data sent from an external equipment at the time of recording operation and the quantity of data stored in the buffer memory 7 and changing the frequency of a reference clock for determining the modulation processing speed of a signal processing circuit 8 and the gain of the servo circuit 5 in accordance with the data transfer state and the quantity of stored data. The rotation of the disk 2 or the signal processing speed of a recording system signal processing circuit is controlled in accordance with the data transfer state such as the interruption/restart of data transfer and the quantity of data stored in the buffer memory 7. Thus, the recording operation can be continuously executed without being interrupted.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a disk type recording/reproducing device.

BACKGROUND OF THE INVENTION When using a conventional disk-type recording/playback device as a data recorder for an external device such as a computer, the transfer speed of the data sent from the external device and the disk-type recording/playback device are the recording medium. To absorb the difference in recording speed when writing data to a certain disc, it is necessary to temporarily store the transferred data in a large-capacity buffer memory built into the disc-type recording/playback device, or to write the data to the disc. The recording operation was intermittent.

Problems to be Solved by the Invention However, using a large-capacity buffer memory as described above not only increases the cost of the device, but also increases the timing at which data is transferred from the outside and when the data is actually recorded on the disk. There is a problem in that the time difference between the timing and the timing is very large.

In addition, in the method of absorbing the difference between the writing speed and the data transfer speed by intermittent data recording operations on the disk, a gap (physical space) is created in the portion of the disk corresponding to the stoppage of the recording operation, especially when interleaving etc. When recording using this method, a larger gap is generated, resulting in a problem in that the recording space of the disc is reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disk-type recording/reproducing apparatus that can continuously record data transferred from the outside without using a large-capacity buffer memory.

Means for Solving the Problems The present invention comprises a buffer memory that temporarily stores data transferred from the outside, and a recording signal processing circuit that processes data read from the buffer memory into recordable signals. In a disk-type recording and reproducing apparatus using a disk as a recording medium, the following are provided: 2. Transfer state detection means for detecting the transfer state of data from the outside; Accumulated data amount detection means for detecting the amount of data stored in the buffer memory; The speed of disk rotation, signal processing in the recording system signal processing circuit, etc. is determined according to the data transfer state detected by the transfer state detection means and the data amount detected by the accumulated data amount detection means.
The present invention is a disc-type recording/reproducing device characterized by comprising a control means for controlling recording operations to be performed continuously.

According to the present invention, the speed of disk rotation and signal processing in the recording system signal processing circuit is controlled depending on the data transfer status such as interruption and resumption of data transfer and the amount of accumulated data stored in the buffer memory. Therefore, the recording operation is performed continuously without interruption.

Embodiment The drawing shows a disk type recording/reproducing device W which is an embodiment of the present invention.
FIG. 1 is a block diagram showing a schematic configuration of the computer.

This disk-type recording/playback device 1 is a recording/playback device that uses a write-once optical disk (hereinafter referred to as a disk) 2 as a recording medium, and the big-up 3 records data on the disk 2 and also records data on the disk 2. This is a device for reading the data.

The disk motor 4 is a drive source for rotationally driving the disk 2, and the operations of the disk motor 4 and the pickup 3 are controlled by a servo circuit 5.

The interface 6 is an input/output device for inputting data sent from an external device such as the host computer 10 and for outputting data read and reproduced from the disk 2 to the external device such as the host computer 10. be.

The buffer memory 7 is a recording device for temporarily storing data input from the outside via the interface 6, and for temporarily storing data read and reproduced from the disk 2 before outputting to the outside. It is.

4 The signal processing circuit 8 modulates the data input from the outside and temporarily stored in the buffer memory 7 into a recordable signal, and also demodulates the data read from the disk 2 by the big-up 3 into the original signal. This is a circuit for processing.

The controller 9 is composed of a microcomputer and has a function of controlling the operations of the servo circuit 5, interface 6, buffer memory 7, signal processing circuit 8, etc. described above. In particular, its control functions include the transfer status of data sent from an external device during recording operation (transfer interruption, restart, etc.), detection of the amount of accumulated data in the buffer memory 7, and response to the above data transfer status and accumulated data amount. It includes a function of changing the frequency of the basic clock that determines the modulation processing speed of the signal processing circuit 8 and the gain of the servo circuit 5 (including the gain related to the rotation speed control of the disk motor 4).

Next, a recording operation of the disc type recording/reproducing apparatus 1 will be described when the disc type recording/reproducing apparatus 1 is used as a data recorder for the host computer 10, which is an external device.

When a data recording system command is transmitted from the host computer 10 to the controller 9 via the interface 6, the controller 9 sends the data recording system command to the disk motor 4 via the servo circuit 5.
to set the disk 2 to a constant rotation. Also,
At the same time, the controller 9 sets the big up 3 to an operating state via the servo circuit 5.

When the standby state is set in this way, a signal is sent from the controller 9 to the host computer 10 via the interface 6 to inform that data can be transferred. begins to be transferred, and the data is sequentially stored in the buffer memory 7.

When the amount of data stored in the buffer memory 7 reaches a predetermined amount, the controller 9 reads out the data from the buffer memory 7 and sends it to the signal processing circuit 8l\. At this time, the controller 9 controls the signal processing circuit 8 to perform a modulation operation at a predetermined constant processing speed. The data sent to the signal processing circuit 8 and modulated into a recordable signal is sequentially recorded on the disk 2 by the backup 3.

When the data transfer from the host computer 10 is temporarily stopped under the above recording operation, the controller 9 detects the stop of inputting data from the interface 6, and from then on, the basic clock that determines the processing speed of the signal processing circuit 8 is activated. frequency and the gain set in the servo circuit 4 (including the gain related to the rotation speed control of the disk motor 4)
is changed, and the data recording speed on the disk 2 is gradually lowered. Therefore, the host computer 10
The data recording operation continues without interruption even after data transfer from the device stops.

After the data transfer is interrupted, data is transferred again from the host computer 10 via the interface 6, and when the amount of accumulated data stored in the buffer memory 7 reaches a certain amount, the controller 9 again transfers the data to the signal processing circuit 8. The basic clock and the gain of the servo circuit 5 are changed in stages to return the data recording speed to the disk 8 to the original speed.

In this way, suitable recording is performed while adjusting the data recording speed according to the state of data transfer from the host computer 10 while maintaining the continuity of the recording operation as much as possible.

Effects of the Invention As described above, according to the disk type recording and reproducing apparatus of the present invention, the rotation of the disk and the recording system are controlled depending on the transfer status of data sent from the outside and the amount of accumulated data stored in the buffer memory. Since the configuration is such that the speed of signal processing, etc. in the signal processing circuit is controlled, recording operations can be performed continuously using a small capacity buffer memory, and costs can also be reduced.

[Brief explanation of the drawing]

The drawing is a block diagram showing a schematic configuration of a disk-type recording and reproducing apparatus according to an embodiment of the present invention.92...disk, 3...big-up, 4...disk motor, 5... Servo circuit, 6...interface, 7.
...Buffer memory, 8...Signal processing circuit, 9...
controller

Claims (1)

[Claims] A recording disk including a buffer memory that temporarily stores data transferred from the outside and a recording signal processing circuit that processes the data read from the buffer memory into recordable signals. In a disk-type recording/playback device as a medium, a transfer state detection means detects the transfer state of data from the outside, an accumulated data amount detection means detects the amount of data stored in the buffer memory, and a transfer state detection means detects the amount of data stored in the buffer memory. The speed of disk rotation and signal processing in the recording system signal processing circuit is determined according to the data transfer state and the amount of data detected by the storage data amount detection means.
1. A disc-type recording/reproducing device comprising: a control means for controlling recording operations to be performed continuously.