JPH05234347A - Disk recorder/reproducer - Google Patents

Abstract

PURPOSE:To enable the checking of the protection of a voice signal with a shockproof memory by performing a detection during an effective operation of a memory with a shockproof memory operation judging circuit to show the results on a display section. CONSTITUTION:A signal read with a magnetooptical head 6 is decoded with a reproduction signal decoder 8 at the reproduction to be stored into a shockproof memory 4. As the supply of the signal to the memory 4 ceases from the decoder 8 because of focal deviation or others, the reading of a reproduction signal left in the memory 4 is performed. A shockproof memory operation judging circuit 9 detects accumulation of the signal of the memory 4 during the recording and a reduction in the signal of the memory 4 during the reproduction is detected to judge that the memory 4 is in effective operation. The results of the judgment are shown on a display section 11 through a display circuit 10. Thus, it can be learned that a voice signal is protected with the shockproof memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus equipped with a shock proof memory which eliminates a sound skipping phenomenon caused by external vibration.

[0002]

2. Description of the Related Art For example, in a magneto-optical disk player (hereinafter referred to as an MD player) having concentric or spiral tracks in which digital audio data is recorded as a magneto-optical information pit string, the disk has a constant linear velocity by a spindle motor. Alternatively, while rotating at an angular velocity, a laser beam is irradiated along a track on the disk to record or reproduce data.

In this case, when a shock such as an external vibration is applied, the focus is lost or the track is skipped, and the sound is interrupted. In order to prevent this, the sound being reproduced or recorded during the track returning operation is prevented from being interrupted by passing through the shock proof memory.

[0004]

However, since the storage capacity of the shock proof memory is limited, if the track is repeatedly missed, the sound will be interrupted. In such a case, there is a problem that it is impossible to know whether the shock proof memory is not working or the load larger than the capacity of the shock proof memory is applied.

The present invention has been made in view of the above circumstances, and is intended to display that the shock proof memory is operating.

[0006]

In order to solve such a problem, a disk recording / reproducing apparatus according to a first aspect of the present invention uses a regular track when a track deviation occurs due to a shock generated during reproduction or recording. In a disc recording / reproducing apparatus provided with a shock proof memory 4 for preventing a signal being reproduced or being recorded from being interrupted by the time it returns to the state, the shock proof memory 4 judges that the shock proof memory 4 is in effective operation. Shockproof memory operation determination circuit 9 as memory operation determination means
And a display unit 11 as a display unit for performing a display corresponding to the determination result of the shock proof memory operation determination circuit 9.

A disk recording / reproducing apparatus according to a second aspect is the recording / reproducing apparatus according to the first aspect, wherein the display unit 1 is provided.
1 displays the amount of data stored in the shock proof memory 4.

[0008]

In the disk recording / reproducing apparatus according to the first aspect of the present invention, when the shock proof memory operation judging circuit 9 judges that the shock proof memory 4 is in the effective operation, the display section 11 displays the fact.

In the disk recording / reproducing apparatus according to the second aspect, the data storage amount of the shock proof memory 4 is displayed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention. When a magneto-optical disk 1 contained in a cartridge is mounted, a shutter 2 is opened so that recording or reproduction is possible. There is. During recording or reproduction, the spindle motor 3 rotates and rotates the disk 1.

At the time of recording, the recording signal passes through the shock proof memory 4 and is converted into a recording signal by the recording signal encoder 5, and the recording signal is recorded on the disk 1 by the magneto-optical recording head 6.

If the focus is out of focus or the like due to the shock and the signal cannot be continuously recorded, the abnormality detecting circuit 7 detects the fact and feeds it back to the shock proof memory 4. Reference numeral 4 stores the recording signal in itself, and the recording signal is not supplied to the recording signal encoder 5.

Then, when recording becomes possible due to the completion of the track returning process, the recording signal stored up to that point is supplied from the shock proof memory 4 to the recording signal encoder 5, and recording is restarted. It

The recording density of the disc 1 used in the MD player is 5 as in the case of a CD (compact disc).
Since the shock-proof memory 4 can store a recording signal for 3 seconds since it is compressed and recorded twice, and if it takes 3 seconds for a recordable state, the accumulated signal is 0. It can be recorded in about 6 seconds.

During reproduction, the spindle motor 3 rotates and the signal read by the magneto-optical recording head 6 is reproduced by the reproduction signal decoder 8.
Is decoded and stored in the shock proof memory 4, and then read and output as a reproduction signal.

At this time, the signal is read so that the shock proof memory 4 is always fully stored. When no signal is supplied from the reproduction signal decoder 8 to the shock proof memory 4 due to defocusing or the like, only the reproduction signal remaining in the shock proof memory 4 is continuously read.

Thereafter, when the magneto-optical head 6 returns to the original track position, the signal from the reproduction signal decoder 8 is again supplied to the shock proof memory 4, and if it takes 3 seconds until then. In about 0.6 seconds thereafter, the data added to the shock proof memory 4 becomes full.

The shock proof memory operation determination circuit 9 is always operated during recording / reproduction, and during recording, it is determined that signals are accumulated in the shock proof memory 4 and it is determined that the operation is in progress. During reproduction, it is possible to detect that the data stored in the shock proof memory 4 is decreasing, and to detect that the operation is in progress. When the shock proof memory operation determination circuit 9 determines that the shock proof memory 4 is operating, the display unit 11 displays the fact that the shock proof memory 4 is operating through the display circuit 10 during that time.

The display of the display unit 11 is performed by, for example, an FLD or an LED, and as an example, a logo of a shock proof memory or an on / off character is displayed. FIG. 2 shows the display by the level meter 21.

During recording in the shock proof memory 4, the shaded portion in FIG. 3 (a) is the portion where signals are accumulated, and the lowermost portion is monitored by the pointer. Inputs come from the top and outputs come from the bottom. During playback, the shaded area is the portion where the signal remains, as shown in FIG. 3 (b), and the input is supplied from the bottom.
The output is taken from the top. Then, the top of the portion where the signal is accumulated is monitored by the pointer.

The level meter 21 displays the usage amount of the entire shock proof memory 4, that is, the effective remaining amount of the shock proof memory 4, as the usage amount. When recording, the portion not shaded in FIG. 3A is the remaining amount (margin), and when reproducing, FIG.
The shaded portion in (b) is the remaining amount (margin amount).

Therefore, in any case, if the distance L from the portion indicated by the symbol a to the pointer is displayed by the level meter 21, the remaining amount (margin amount) is displayed. In this case, the remaining amount portion is displayed, and the display amount decreases as the remaining amount decreases. Further, it is also possible to display the portion from the uppermost portion of FIGS. 3A and 3B to the pointer, that is, the usage amount. In this case, the part that is not displayed is the remaining amount.

[0023]

As described above, according to the disk recording / reproducing apparatus of the first aspect, it is determined that the shock proof memory is being effectively operated and displayed. Therefore, the sound signal is protected by the shock proof memory. You can know what is being done.

In the disk recording / reproducing apparatus according to the second aspect, since the storage amount of the shock proof memory is displayed, there is an effect that the margin of the memory capacity can be visually recognized.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of another embodiment of the present invention.

FIG. 3 is a diagram showing a state of signals accumulated in a shock proof memory.

[Explanation of symbols]

 1 Magneto-optical disk 2 Shutter 3 Spindle motor 4 Shock proof memory 5 Recording signal encoder 6 Magneto-optical recording head 7 Abnormality detection circuit 8 Reproduction signal decoder 9 Shock proof memory operation determination circuit 10 Display circuit 11 Display section 21 Level meter

Claims (2)

[Claims] 1. A shock proof memory for preventing interruption of a signal being reproduced or recorded during the time when a track deviation occurs due to a shock generated during reproduction or recording until the track returns to a regular track. In the disc recording / reproducing apparatus, a shock proof memory operation determining means for determining that the shock proof memory is in an effective operation, and a display means for performing a display corresponding to a result of the shock proof memory operation determining means are provided. A disk recording / reproducing device characterized by the above. 2. The disk recording / reproducing apparatus according to claim 1, wherein the display means further displays the amount of data stored in the shock proof memory.