JP2003157621A - Data recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data reproducing device which repeatedly reproduces data with few breaks. SOLUTION: In repetitive reproduction, specified data in a repetitive reproduction area which are recorded from the head of a repetitive reproduction area on a disk 200 to a specified position in the repetitive reproduction area are read out of the disk 200 and stored in a partial area of a quake-resistant memory 4 and reproduced by being read out of the quake-resistant memory 4 and data, other than the specified data in the repetitive reproduction area, which are recorded in the repetitive reproduction area are reproduced by being read out of the disk 200.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data reproducing apparatus for reproducing data recorded on a predetermined recording medium, and more particularly, for temporarily storing data read from the recording medium until it is output to the outside. The present invention relates to a repeat reproducing function for repeatedly reproducing data recorded in a designated area on a recording medium in a data reproducing apparatus having a storage means.

[0002]

2. Description of the Related Art A data reproducing apparatus having a repeat reproducing function for repeatedly reproducing data recorded in a specified area on a recording medium has been provided. Conventionally, when the data read position on the recording medium reaches the end of the specified area, the data read from the recording medium is temporarily stopped and the data read position on the recording medium is moved to the end of the specified area. Then, the repeat reproduction is realized by repeatedly performing a series of operations of restarting the reading of the data from the recording medium.

Further, in a portable data reproducing apparatus, static storage means such as a semiconductor memory (the writing and reading of data does not involve a mechanical operation until the data read from the recording medium is output to the outside). It is adapted to be temporarily stored in a storage means). With this configuration, even if the data read position on the recording medium is displaced due to a disturbance such as vibration, the data read position on the recording medium is normally restored before the static storage means becomes empty. If so, the data to be reproduced is not interrupted.

[0004]

As described above, when the data read from the recording medium is temporarily stored in the storage means, even in the repeat reproduction, the data on the recording medium is empty before the storage means becomes empty. When the movement of the read position of is completed, the reproduced data will not be interrupted.

However, as described above, in the conventional repeat reproduction, the read position is moved from the end to the tip of the designated area. Therefore, when the designated area is a relatively large area, the read position is changed. The time required to complete the movement tends to be long, and as a result, the movement of the data read position on the recording medium is not completed before the storage means becomes empty, and the reproduced data may be interrupted. It was very good.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a data reproducing device in which data reproduced during repeat reproduction is less likely to be interrupted. Another object of the present invention is to provide a data reproducing device with reduced power consumption during repeat reproduction.

[0007]

In order to achieve the above object, the present invention has a repeat reproducing function for repeatedly reproducing data recorded in a repeat reproducing area on a predetermined recording medium, and the recording medium. In a data reproducing apparatus provided with a storage means for temporarily storing the data read from, in the repeat reproduction, the data recorded from the tip of the repeat reproduction area to a predetermined position in the repeat reproduction area. Or, the repeat reproduction area specific data, which is the data recorded from a predetermined position in the repeat reproduction area to the end of the repeat reproduction area, is read from the recording medium to a partial area of the storage means. It is stored until the repeat playback is completed, and the specific data in the repeat playback area is Regenerated by reading from the storage means, whereas, for the repeat play area specific data other than the data recorded in the repeat playback region is to be reproduced by reading from the recording medium.

In the repeat reproduction, while the specific data in the repeat reproduction area is being read from the storage means, the supply of power to the portion which is only involved in reading the data from the recording medium is stopped. You may

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram of a disc player 100 that reproduces data recorded on a disc, which is a disc-shaped recording medium, according to an embodiment of the present invention.
Shown in. In the figure, 1 is a reading unit, 2 is a reproduction processing unit, 3 is a memory controller, 4 is an earthquake resistant memory, 5 is an expansion processing unit, 6 is a D / A conversion unit, and 7 is an output unit.
A disc 200 is detachable from the disc player 100.

The operation of reproducing the data recorded on the disk 200 will be described. The reading unit 1
The data recorded on the disk 200 is read by rotating the disk 200 at a predetermined speed, irradiating the disk 200 with light, and converting the reflected light from the disk 200 into an electric signal. The reproduction processing unit 2 subjects the data read by the reading unit 1 to demodulation processing for the modulation processing performed during recording and error correction processing, and outputs the data.

The memory controller 3 temporarily stores the data output from the reproduction processing unit 2 in the seismic resistant memory 4 and then reads it again from the seismic resistant memory 4 to expand it.
Control to be input to. That is, the earthquake resistant memory 4 is used as a buffer memory between the reproduction processing unit 2 and the expansion processing unit 5.

As a result, even if the data read position on the disk 200 is displaced due to a disturbance such as vibration, the data read position on the disk 200 is normally restored before the seismic memory 4 becomes empty. When it returns, the data to be reproduced is not interrupted. Seismic memory 4
Is composed of, for example, a DRAM which is a kind of semiconductor memory.

Further, in the present embodiment, at the time of normal reproduction, the entire area of the earthquake-proof memory 4 is used as a buffer memory between the reproduction processing unit 2 and the expansion processing unit 5.
As will be described later, when repeat reproduction is performed, a part of the seismic resistant memory 4 is secured as a data storage area, and the remaining area serves as a buffer memory between the reproduction processing unit 2 and the expansion processing unit 5. used.

The decompression processing section 5 decompresses input data and outputs it. The D / A conversion unit 6 converts the signal output from the expansion processing unit 5 into an analog signal. The output unit 7 is
The analog signal output from the D / A converter 6 is output to the outside.

The operation during repeat reproduction will be described.
First, as shown in FIG. 2, a partial area 4-1 of the seismic resistant memory 4 is secured as a data storage area, and the remaining area 4-2 of the seismic resistant memory 4 is expanded with the reproduction processing unit 2 and the expansion processing. It is set to be used as a buffer memory with the unit 5.

Next, assuming that the data recorded in the repeat reproduction area rpt on the disc 200 shown in FIG. 3 is repeatedly reproduced, from the tip S of the repeat reproduction area rpt to a predetermined position A in the repeat reproduction area rpt. The data recorded up to is read from the disk 200, stored in the data storage area 4-1 of the earthquake-resistant memory 4, and stored until the repeat reproduction is completed.

Then, from the tip S of the repeat reproduction area rpt on the disc 200 shown in FIG.
The data recorded up to a predetermined position A in pt is reproduced by reading it from the data storage area 4-1 of the seismic memory 4, and the remaining data recorded in the repeat reproduction area rpt (see FIG. 2). The data recorded from the predetermined position A in the repeat reproduction area rpt to the end E of the repeat reproduction area is reproduced by reading from the disc 200 each time.

With the above structure, the disk 2 shown in FIG.
When the data recorded in the repeat reproduction area rpt on 00 is repeatedly reproduced, when the data read position on the disk 200 becomes the end E of the repeat reproduction area rpt, the data read position on the disk 200 is changed to the conventional one. While it has been necessary to move to the tip S of the repeat reproduction area rpt, in the present embodiment, it is sufficient to move it to a predetermined position A of the repeat reproduction area rpt.

That is, in the present embodiment, the distance to move the data read position on the disk 200 during repeat reproduction is shorter than that in the conventional art. Therefore, the shorter the read position is moved, the more the read position is moved. Since the time required for completion tends to be short, the data reproduced during repeat reproduction is less likely to be interrupted.

In this embodiment, the seismic resistant memory 4 is used as an area for storing a part of the data recorded in the repeat reproduction area until the repeat reproduction is completed.
Since a part of the area is allocated, it is not necessary to add new memory.

During the repeat reproduction, it is not necessary to read the data from the disk 200 while the data stored in the data storage area 4-1 of the seismic memory 4 is being read, so the data is read from the disk 200. The supply of power to the part (specifically, the reading unit 1, the reproduction processing unit 2, etc.) related to only the power supply may be stopped. In this way, power consumption during repeat reproduction is reduced. Further, this makes it possible to use the battery for a long time when the battery is used as the power source.

At the time of repeat reproduction, the data recorded from the tip S of the repeat reproduction area rpt on the disk 200 shown in FIG. 3 to a predetermined position A in the repeat reproduction area rpt is read from the disk 200 and quake-proof. Instead of storing the data in the data storage area 4-1 of the memory 4 for reproduction until the end of the repeat reproduction, the repeat reproduction area rp from the predetermined position B in the repeat reproduction area rpt shown in FIG.
The data recorded up to the end E of t is recorded on the disc 20.
Data storage area 4 of the earthquake-proof memory 4 read from 0
It may be stored in 1 until the repeat reproduction is completed.

At this time, the data recorded from the predetermined position B in the repeat reproduction area rpt on the disc 200 to the end E of the repeat reproduction area rpt is read from the data storage area 4-1 of the seismic memory 4. The remaining data which is reproduced by reading and recorded in the repeat reproduction area rpt (the data recorded from the tip S of the repeat reproduction area to a predetermined position B in the repeat reproduction area rpt is read from the disc 200. It can be reproduced by

[0024]

As described above, according to the present invention,
Since a part of the data to be repeatedly reproduced is read from the recording medium and stored in the storage means, and is reproduced by being read from this storage means, the distance to move the read position of the data on the recording medium during the repeat reproduction is small. It is short, and as a result, the data is less likely to break.

Further, while reading a part of the data to be repeatedly reproduced from the storage means, the power supply to the part which is only involved in the reading of the data from the recording medium is stopped to reduce the power consumption. You can

[Brief description of drawings]

FIG. 1 is a block diagram of a disc player according to an embodiment of the present invention.

FIG. 2 is a diagram showing that a part of the seismic resistant memory is secured as a data storage area during repeat reproduction.

FIG. 3 is a diagram showing an area of a repeat reproduction area on a disc in which data read from the disc during repeat reproduction and stored in a data storage area of a seismic memory is recorded.

FIG. 4 is a diagram showing another example of an area of the repeat reproduction area on the disc in which the data read from the disk at the time of repeat reproduction and stored in the data storage area of the earthquake-resistant memory is recorded.

[Explanation of symbols]

1 reading section 2 Playback processing section 3 memory controller 4 Seismic memory 5 Expansion processing section 6 D / A converter 7 Output section

Claims (2)

[Claims] 1. A repeat reproduction function for repeatedly reproducing data recorded in a repeat reproduction area on a predetermined recording medium, and a storage unit for temporarily storing data read from the recording medium. In the data reproducing apparatus, in the repeat reproduction, the data recorded from the tip of the repeat reproduction area to a predetermined position in the repeat reproduction area, or the repeat reproduction from a predetermined position in the repeat reproduction area. The specific data in the repeat reproduction area, which is the data recorded up to the end of the area, is read from the recording medium and stored in a partial area of the storage means until the repeat reproduction is completed, and the repeat reproduction is performed. The specific data in the area is reproduced by reading it from the storage means, while Data reproducing apparatus for the repeated reproduction area specific data other than the data recorded in Pete reproducing region, characterized in that the reproduction by reading from the recording medium. 2. In the repeat reproduction, while the specific data in the repeat reproduction area is being read out from the storage means, the supply of power to a portion which is only involved in reading out data from the recording medium is stopped. The data reproducing apparatus according to claim 1, wherein