JP2001035079A - Digital dubbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital dubbling device in which the continuity of data is secured even when a recording error and a reproducing error are generated and which is capable of avoiding the redoing of a dubbing. SOLUTION: This digital dubbing device is provided with a transfer request controller 14 which stops the transferring of digital reproduced data from a shock-proof memory controller 4' to a sound compressor 7 when a data residual amount detector 12 or 13 detects that the residual amount of the digital reproduced data which are already stored in the shock-proof memory 5' of a CD player 1' is equal to or smaller than a prescribed amount or the residual amount of the dubbling data which are already stored in a shock-proof memory 9' is equal to or larger than the prescribed amount.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital dubbing apparatus for dubbing continuous digital data such as audio information recorded on a recording medium to another recording medium.

[0002]

2. Description of the Related Art An audio signal recording / reproducing system has shifted from an analog system to a digital system. As recording media for consumer use, compact discs (hereinafter referred to as CDs), which are optical discs exclusively for reproducing digital audio signals, and mini discs (hereinafter, referred to as MDs), which are magneto-optical discs capable of recording / reproducing / erasing. ) Etc. have been developed.

[0003] The MD is smaller than the CD, and has a diameter approximately half that of the CD. The digital audio signal recorded on the MD has an ATRAC (Adaptive Transform) in order to secure the same information recording amount as the CD.
Data is compressed to about 1/4 by an audio efficient coding method called Acoustic Coding.

FIG. 6 shows a configuration example of a conventional recording / reproducing apparatus (C
Example of configuration of recording / reproducing device for dubbing from D to MD)
Is shown. As shown in FIG. 6, the CD playback device 1 includes a CD disk 2, a CD playback signal processor 3, a shockproof memory controller 4, and a shockproof memory 5.
(For example, a 16 Mbit DRAM).

[0005] The CD disk 2 is reproduced at twice the normal speed. The reproduced data (hereinafter, referred to as digital reproduction data) is subjected to demodulation, error correction processing, and the like by a CD reproduction signal processor 3 and then to a shock proof memory 5 at double speed via a shock proof memory controller 4. Is temporarily stored intermittently. Thereafter, the data is read out from the shock proof memory 5 at 1 × speed via the shock proof memory controller 4 and transferred to the MD recording device 6 (indicated by b in FIG. 6). The shock proof memory controller 4 controls the address of the shock proof memory 5 and reads out digital reproduction data stored at the address.

[0006] As shown in FIG. 6, the MD recording device 6 includes a voice compressor 7, a shockproof memory controller 8,
Shock proof memory 9 (for example, 16 Mbit D
RAM), an MD recording signal processor 10, and an MD disk 11.

According to the above configuration, the 1 × digital reproduction data (see FIG. 6B) transferred from the CD reproduction apparatus 1 is subjected to data compression by the audio compressor 7 to about 1/4. The data is temporarily stored in the shock proof memory 9 as dubbing data. Thereafter, the dubbing data is intermittently read from the shock proof memory 9 at 1 × speed, and
The recording signal processor 10 adds an error correction code, performs modulation processing, and the like, and dubbs the MD disc 11.

However, dubbing (writing) to the MD disk 11 is intermittent recording with an intermittent ratio of 1/4. M
Dubbing to the D disk 11 is magnetic field modulation recording using a laser pickup (not shown), and is performed at 1 × speed due to laser power and the like.

FIG. 7 shows a CD in the recording / reproducing apparatus shown in FIG.
5 shows the elapsed time of the storage amount (data remaining amount) of digital reproduction data in the shock proof memory 5 of the reproduction device 1. In this example, the digital reproduction data is written to the shock proof memory 5 at a speed at which the 16-Mbit DRAM becomes full in 5 seconds (see the characteristic shown by the broken line in FIG. 7).

However, reading of the digital reproduction data from the CD disk 2 is performed intermittently so that the remaining amount of the digital reproduction data in the shock proof memory 5 becomes as full as possible. Shock proof memory 5
Read digital playback data from
The operation is continuously performed at a speed at which the 6-Mbit DRAM becomes empty (see the characteristics shown by the broken line in FIG. 7).

When a shock or the like occurs in the CD reproducing apparatus 1 and it becomes impossible to write data to the shock proof memory 5, only reading is performed, and the digital reproduction data stored up to that point is shock proof. Read from the memory 5. In this case, the shock proof ability is about 10 seconds.

FIG. 8 shows an MD in the recording / reproducing apparatus shown in FIG.
This shows the elapsed time of the storage amount (data remaining amount) of dubbing data in the shock proof memory 9 of the recording device 6. Since the data compression ratio is about 1/4, dubbing data is continuously written to the shock proof memory 9 at a speed at which the 16-Mbit DRAM becomes full in 40 seconds (the characteristic shown by the broken line in FIG. 8). See). Reading of dubbing data from the shock proof memory 9 is performed as follows.
The operation is performed at a speed at which a 16-Mbit DRAM is emptied in 0 seconds (see the characteristic shown by the broken line in FIG. 8). However,
Writing of dubbing data to the MD disk 11 is performed intermittently so that the remaining data amount becomes as empty as possible.

When a shock or the like occurs in the MD recording device 6 and reading of dubbing data from the shock proof memory 9 becomes impossible, only writing of dubbing data is performed. In this case, the shock proof ability is about 40 seconds.

The CD reproducing apparatus 1 shown in FIG. 6 has the shock proof memory 5, but there is also a case without the shock proof memory 5, and an example of this case is shown in FIG. Members having the same functions as those in FIG. 6 are denoted by the same reference numerals.

In this case, the CD disk 2 is rotated at 1 × speed. Data is transferred to the MD recording device 6 at 1 × speed. The CD reproducing device 1a does not have a shock-proof capability, and the sound is immediately interrupted due to vibration or the like.

The shock-proof memories 5 and 9 are:
It is used for shock proof as described above, but as other uses, it is necessary to prevent interruption of sound when performing a retry process when an error occurs during reproduction of the CD disk 2 and to prevent the MD disk 11 from being interrupted. A rewrite process is performed when there is an error during writing, but there is no sound interruption at this time.

[0017]

A reproduction control circuit having a dubbing function as described above, for example, in which a reproduction signal is not interrupted, responds to a change in the capacity of a signal written in a memory circuit. There has been proposed a technique for switching a reading speed of a signal from a disk (for example, see Japanese Patent Application Laid-Open No. 6-162664).

However, the above publication does not disclose processing when a reproduction error or a recording error occurs, but only discloses retry processing when an error occurs. In such an example, if a reproduction error or a recording error occurs during dubbing, the sound is interrupted.

Further, retry processing when an error occurs becomes complicated. This is because, for example, when an error occurs on the CD reproducing device, the MD recording device on which no error has occurred needs to perform the retry process.

Considering such a situation, originally, it is necessary to minimize the occurrence of an error state such as interruption of sound. For example, in the case of high-speed dubbing of about twice the speed, processing can be performed by using a shock-proof memory so that sound interruption does not occur for a certain error. However, if a reproduction error or a recording error occurs when performing high-speed digital dubbing at, for example, about 4 × speed, even if this shock proof memory is used, sound interruption will occur.

In this case, sound interruption (data stop) occurs in time, but when it is not necessary to convert to an audio signal in real time, continuity of data can be originally maintained. However, in a normal device, if discontinuous data occurs in time, assuming that it is converted into an acoustic signal in real time, the auditory correction (mute,
Smoothing, filtering, etc.) are generally performed.

[0022]

In order to solve the above-mentioned problems, a digital dubbing apparatus according to the present invention intermittently reads digital reproduction data from a first recording medium,
First memory control means for intermittently temporarily storing the read digital reproduction data in the first storage means; and compressing the digital reproduction data in the first storage means transferred via the first memory control means; Compression means for outputting dubbing data; and a second memory for temporarily storing the dubbing data in the second storage means, intermittently reading dubbing data from the second storage means, and sequentially dubbing the dubbing data to a second recording medium. Control means for detecting whether the remaining amount of digital reproduction data in the first storage means is equal to or less than a predetermined amount or the remaining amount of dubbing data in the second storage means is equal to or more than a predetermined amount; Data transfer control means for stopping the transfer of the digital reproduction data from the control means to the compression means.

According to the above invention, the first memory control means intermittently reads the digital reproduction data from the first recording medium and temporarily stores the digital reproduction data in the first storage means. First
The digital reproduction data read from the storage means is
Transferred to the compression means via the memory control means, where:
The compressed data is temporarily stored as dubbing data in the second storage unit via the second memory control unit. The dubbing data is sequentially and intermittently read from the second storage unit via the second memory control unit, and is dubbed to the second recording medium.

If a reproduction error occurs for some reason during such dubbing operation, the digital reproduction data cannot be stored in the first storage means thereafter, unless a recording error occurs. The digital reproduction data stored in the first storage means is transferred to the compression means via the first memory control means, and the dubbing data is dubbed to the second recording medium as described above.

That is, during the period of the reproduction error, the digital reproduction data read from the first recording medium is not stored in the first storage means, but is stored in the first storage means before the reproduction error occurs. Is read out as usual and transferred to the compression means via the first memory control means. As a result, the remaining amount of digital reproduction data stored in the first storage means decreases. On the other hand, the digital reproduction data transferred to the compression means is stored in the second storage means as dubbing data after being compressed here.
The remaining amount of dubbing data in the second storage means increases. Then, the dubbing data is read from the second storage means,
Dubbed to the second recording medium via the second memory control means.

While such an operation is being performed, the remaining amount of the digital reproduction data stored in the first storage means may be less than or equal to a predetermined amount, or the remaining amount of the dubbing data stored in the second storage means may be used. When it is detected that the amount is equal to or more than the predetermined amount, the transfer of the digital reproduction data from the first memory control means to the compression means is stopped by the data transfer control means.

Thereafter, when the reproduction error is restored to normal, the intermittent reading of the digital reproduction data from the first recording medium is restarted, and the digital reproduction data is temporarily stored in the first storage means. At this stage, the transfer of the digital reproduction data from the first memory control means to the compression means is still stopped by the data transfer control means, but the amount of the digital reproduction data stored in the first storage means gradually increases. When it is detected that the data is larger than the predetermined amount, the transfer of the digital reproduction data from the first memory control means to the compression means is restarted by the data transfer control means.

As a result, the digital reproduction data read from the first storage means is transferred from the first memory control means to the compression means, and the compressed data is temporarily stored in the second storage means as dubbing data. Is done. Thereafter, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, when the reproduction error occurs, the transfer of the digital reproduction data from the first memory control means to the compression means is stopped, so that the remaining amount of the digital reproduction data stored in the first storage means becomes a predetermined amount. Therefore, it is possible to reliably prevent the dubbing data stored in the second storage unit from becoming larger than the predetermined amount, so that the continuity of the dubbing data can be reliably maintained. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for some reason during the dubbing operation, the digital reproduction data is continuously stored in the first storage means, and the digital reproduction data stored in the first storage means is deleted. The data is transferred to the compression means, but the dubbing data in the second storage means is not dubbed to the second recording medium.

That is, even during the recording error period, the digital reproduction data is read from the first storage means and transferred to the compression means as usual, and after being compressed here, stored as dubbing data in the second storage means. Is done. However, since no dubbing operation is performed on the second recording medium,
The remaining amount of dubbing data stored in the second storage means increases without decreasing. In the course of performing such an operation, when it is detected that the remaining amount of the dubbing data stored in the second storage unit is equal to or more than a predetermined amount, the first memory control unit transmits the data to the compression unit. The transfer of the digital reproduction data is stopped by the data transfer control means.

Then, when the recording error is restored to normal, dubbing of the dubbing data temporarily stored in the second storage means to the second recording medium is resumed. At this stage,
Although the transfer of the digital reproduction data from the first memory control means to the compression means is still stopped by the data transfer control means, the remaining amount of the dubbing data stored in the second storage means is reduced. When it is detected that the amount is less than the fixed amount, the transfer of the digital reproduction data from the first memory control means to the compression means is restarted by the data transfer control means.

As a result, the digital reproduction data read from the first storage means is transferred from the first memory control means to the compression means, where the compressed data is temporarily stored as dubbing data in the second storage means. Then, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, at the time of a recording error, the transfer of the digital reproduction data from the first memory control means to the compression means is stopped, so that the remaining amount of the digital reproduction data stored in the first storage means is reduced. Since it is reliably avoided that the dubbing data is less than the fixed amount and the remaining amount of dubbing data stored in the second storage unit becomes larger than a predetermined amount, it is possible to reliably maintain the continuity of the dubbing data. .
Moreover, in this case, it is not necessary to redo the operations of the recording system and the reproducing system.

In order to solve the above problems, another digital dubbing apparatus according to the present invention reads out digital reproduction data from a first recording medium and transfers the read digital reproduction data, Compression means for compressing the digital reproduction data transferred via the reproduction data transfer control means and outputting the data as dubbing data; temporarily storing the dubbing data in the second storage means; A second memory control means for intermittently reading data and sequentially dubbing the data to a second recording medium; and detecting the reproduction data transfer when detecting that the remaining amount of dubbing data in the second storage means is equal to or more than a predetermined amount. Data transfer control means for stopping the transfer of the digital reproduction data from the control means to the compression means. That.

According to the above invention, the reproduction data transfer control means reads the digital reproduction data from the first recording medium and transfers it to the compression means, where the compressed data is stored in the second storage as dubbing data. It is temporarily stored in the means. The dubbing data is sequentially and intermittently read from the second storage unit via the second memory control unit, and is dubbed to the second recording medium.

If a reproduction error occurs during such dubbing operation for some reason, the digital reproduction data is not read out from the first recording medium. On the other hand, as long as no recording error has occurred, the second memory control means is not used. By
As described above, the dubbing data is dubbed to the second recording medium.

That is, during the period of the reproduction error, the digital reproduction data is not read from the first recording medium, but the dubbing data stored before the reproduction error occurs in the second storage means. The dubbing data is read from the second storage means and dubbed to the second recording medium.

After that, when the reproduction error returns to normal, the reading of the digital reproduction data from the first recording medium is restarted. The digital reproduction data read in this way is transferred to the compression means via the reproduction data transfer control means, and then the compressed data is temporarily stored in the second storage means as dubbing data. Along with this,
The amount of dubbing data stored in the second storage means increases,
When it is detected that the amount is equal to or larger than the predetermined amount, the transfer of the digital reproduction data from the reproduction data transfer control means to the compression means is stopped. During the suspension of the transfer, as long as no recording error occurs, the second memory control means
As described above, the dubbing data is dubbed to the second recording medium.

As described above, during reproduction, the remaining amount of dubbing data in the second storage means can be reliably prevented from exceeding a predetermined amount, so that the continuity of dubbing data can be reliably maintained. . Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs during the dubbing operation for some reason, dubbing cannot be performed. Unless a reproduction error occurs, digital reproduction data read from the first recording medium is transmitted to the reproduction data transfer. It is transferred to the compression means via the control means. After being compressed by the compression means, the data is temporarily stored as dubbing data in the second storage means via the second memory control means, but dubbing to the second recording medium is not performed. Therefore, the amount of dubbing data stored in the second storage means increases, and when it is detected that the amount of dubbing data is equal to or larger than the predetermined amount, the transfer of digital reproduction data from the reproduction data transfer control means to the compression means is stopped. .

Thereafter, when the recording error is restored to normal, the dubbing of the dubbing data temporarily stored in the second storage means to the second recording medium is restarted. At this stage,
Although the transfer of the digital reproduction data from the reproduction data transfer control means to the compression means is still stopped by the data transfer control means, the remaining amount of dubbing data stored in the second storage means decreases with the dubbing operation. If it is detected that the amount is less than the predetermined amount, the transfer of the digital reproduction data from the reproduction data transfer control means to the compression means is restarted by the data transfer control means.

As a result, the digital reproduction data read from the first storage means is transferred from the reproduction data transfer control means to the compression means, where the compressed data is temporarily stored as dubbing data in the second storage means. Thereafter, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, when the recording error occurs, the transfer of the digital reproduction data from the reproduction data transfer control means to the compression means is stopped, so that the remaining amount of the dubbing data stored in the second storage means exceeds the predetermined amount. Since the increase is reliably avoided, the continuity of the dubbing data can be reliably maintained. Moreover, in this case, it is not necessary to redo the operations of the recording system and the reproducing system.

Still another digital dubbing device according to the present invention intermittently reads compressed digital reproduction data from a first recording medium and intermittently reads the compressed digital reproduction data from a first recording medium. First memory control means for temporarily storing in the first storage means, and decompression means for decompressing the compressed digital reproduction data read from the first storage means via the first memory control means and outputting the same Compression means for compressing the decompressed digital reproduction data of the decompression means and outputting it as dubbing data;
A second memory control unit for temporarily storing the dubbing data in the second storage unit, intermittently reading the dubbing data from the second storage unit, and sequentially dubbing the dubbing data to a second recording medium; and the first storage unit. When it is detected that the remaining amount of the compressed digital reproduction data is equal to or smaller than a predetermined amount or the remaining amount of the dubbing data in the second storage unit is equal to or larger than a predetermined amount, the first memory control unit controls the decompression unit. And data transfer control means for stopping the transfer of the decompressed digital reproduction data to the compression means through the data transfer control means.

According to the invention, the first memory control means intermittently reads the compressed digital reproduction data from the first recording medium and temporarily stores the compressed digital reproduction data in the first storage means. The compressed digital reproduction data read from the first storage means via the first memory control means is decompressed by the decompression means and then transferred to the compression means, where the compressed data is converted as dubbing data. , Is temporarily stored in the second storage means via the second memory control means. The dubbing data is sequentially and intermittently read from the second storage unit via the second memory control unit, and is dubbed to the second recording medium.

If a reproduction error occurs for some reason during such dubbing operation, the compressed digital reproduction data cannot be stored in the first storage means thereafter, but no recording error has occurred. As long as the compressed digital reproduction data stored in the first storage means is decompressed by the decompression means, the data is transferred to the compression means, and the dubbing data is dubbed to the second recording medium as described above.

That is, during the period of the reproduction error, the compressed digital reproduction data read from the first recording medium is not stored in the first storage means, but is stored in the first storage means before the reproduction error occurs. The stored compressed digital reproduction data is read out via the first memory control means as usual, decompressed by the decompression means, and then transferred to the compression means.
As a result, the remaining amount of the compressed digital reproduction data stored in the first storage means decreases. On the other hand, since the decompressed digital reproduction data transferred to the compression means is stored here as dubbing data in the second storage means after being compressed, the remaining amount of dubbing data in the second storage means increases. Then, the dubbing data is read from the second storage means,
Dubbed to the second recording medium via the second memory control means.

During such an operation, the remaining amount of the compressed digital reproduction data stored in the first storage means is not more than a predetermined amount, or the dubbing data stored in the second storage means is shortly reached. When it is detected that the remaining amount is greater than or equal to the predetermined amount, the transfer of the expanded digital reproduction data from the first memory control unit to the compression unit via the expansion unit is stopped.

Thereafter, upon normal recovery from the reproduction error, the intermittent readout of the compressed digital reproduction data from the first recording medium is restarted and temporarily stored in the first storage means. At this stage, the transfer of the decompressed digital reproduction data from the first memory control means to the compression means via the decompression means is still stopped by the data transfer control means, but has been stored in the first storage means. When it is detected that the amount of the compressed digital reproduction data gradually increases and exceeds the predetermined amount, the transfer of the decompressed digital reproduction data from the first memory control means to the compression means via the decompression means is performed. Restarted by the data transfer control means.

As a result, the compressed digital reproduction data read from the first storage means via the first memory control means is decompressed by the decompression means and transferred to the compression means, where it is compressed. The data is temporarily stored in the second storage means as dubbing data. Thereafter, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, when the reproduction error occurs, the transfer of the decompressed digital reproduction data from the first memory control means to the compression means via the decompression means is stopped. Since the remaining amount of the compressed digital reproduction data is less than the predetermined amount and the remaining amount of the dubbing data stored in the second storage unit is prevented from becoming larger than the predetermined amount, the continuity of the dubbing data can be prevented. Can be reliably held. And in this case,
It becomes unnecessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for some reason during the dubbing operation, the compressed digital reproduction data is continuously stored in the first storage means via the first memory control means. The digital reproduction data stored in the storage means is decompressed by the decompression means and then transferred to the compression means. In this case, the dubbing data in the second storage means is not dubbed on the second recording medium.

That is, during the recording error period, the compressed digital reproduction data is stored in the first storage means as usual.
The data is read out via the memory control means, decompressed by the decompression means, transferred to the compression means, compressed here, and stored in the second storage means as dubbing data. However, since no dubbing operation is performed on the second recording medium, the remaining amount of dubbing data stored in the second storage means increases without decreasing. During such an operation, if it is detected that the remaining amount of the dubbing data stored in the second storage unit is equal to or more than a predetermined amount, the first storage unit may perform the first operation.
The transfer of the expanded digital reproduction data from the memory control means to the compression means via the expansion means is stopped by the data transfer control means.

Then, when the recording error is restored to normal, dubbing of the dubbing data temporarily stored in the second storage means to the second recording medium is resumed. At this stage,
Although the transfer of the expanded digital reproduction data from the first memory control means to the compression means via the expansion means is still stopped by the data transfer control means,
When it is detected that the remaining amount of the compressed dubbing data stored in the storage unit is less than the predetermined amount as the dubbing operation is restarted and the remaining amount is smaller than the predetermined amount, the first memory control unit performs the operation via the decompression unit. The transfer of the decompressed digital reproduction data to the compression means is restarted by the data transfer control means.

As a result, the compressed digital reproduction data read from the first storage means is decompressed by the decompression means and then transferred to the compression means. Here, the compressed data is converted as dubbing data into the second data. Temporarily stored in the storage means,
Thereafter, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, when the recording error occurs, the transfer of the expanded digital reproduction data from the first memory control unit to the compression unit, which is performed via the expansion unit, is stopped. Since the remaining amount of the compressed digital reproduction data is less than the predetermined amount and the remaining amount of the dubbing data stored in the second storage unit is prevented from becoming larger than the predetermined amount, the continuity of the dubbing data can be prevented. Can be reliably held. And in this case,
It is not necessary to redo the operations of the recording system and the reproduction system.

In order to solve the above problems, another digital dubbing apparatus according to the present invention intermittently reads digital reproduction data from a first recording medium and intermittently reads the read digital reproduction data from a first storage means. A first memory control means for temporarily storing the digital reproduction data continuously transferred via the first memory control means in the second storage means as dubbing data; A second memory control unit for intermittently reading dubbing data from the second storage unit and sequentially dubbing the dubbing data to a second recording medium; and determining whether a remaining amount of digital reproduction data in the first storage unit is equal to or less than a predetermined amount. Alternatively, upon detecting that the remaining amount of dubbing data in the second storage means is equal to or greater than a predetermined amount, the first memory control means may control the second memory control. And a data transfer control means for stopping the transfer of the digital reproduction data into stages.

According to the invention, the first memory control means intermittently reads the digital reproduction data from the first recording medium and temporarily stores the digital reproduction data in the first storage means. First
Digital reproduction data continuously read from the first storage means via the memory control means is transferred to the second storage means via the second memory control means, where the digital reproduction data is stored as dubbing data. Is temporarily stored. The dubbing data is sequentially and intermittently read from the second storage unit via the second memory control unit, and is dubbed to the second recording medium.

If a reproduction error occurs for any reason during such dubbing operation, the digital reproduction data cannot be stored in the first storage means thereafter, unless a recording error occurs. The digital reproduction data stored in the first storage means is transferred to the second storage means via the first and second memory control means, and the dubbing data is dubbed to the second recording medium as described above.

That is, during the period of the reproduction error, the digital reproduction data read from the first recording medium is not stored in the first storage means, but is stored in the first storage means before the reproduction error occurs. Is read out and transferred to the second storage means via the first memory control means as usual. As a result, the remaining amount of digital reproduction data stored in the first storage means decreases. On the other hand, since the digital reproduction data transferred to the second storage means is stored here as dubbing data, the remaining amount of dubbing data in the second storage means increases. Then, the dubbing data is read from the second storage means, and is dubbed to the second recording medium via the second memory control means.

While such an operation is being performed, the remaining amount of the digital reproduction data stored in the first storage means is not longer than a predetermined amount, or the remaining amount of the dubbing data stored in the second storage means is eventually over. When it is detected that the amount is equal to or more than the predetermined amount, the transfer of the digital reproduction data from the first memory control unit to the second memory control unit is stopped by the data transfer control unit.

After that, when the normal state is restored from the reproduction error, the intermittent reading of the digital reproduction data from the first recording medium is restarted, and the digital reproduction data is temporarily stored in the first storage means. At this stage, the transfer of the digital reproduction data from the first memory control unit to the second storage unit is still stopped by the data transfer control unit, but the amount of the digital reproduction data stored in the first storage unit is still small. When it gradually increases and is detected to be larger than the predetermined amount, the transfer of the digital reproduction data from the first memory control means to the second storage means is restarted by the data transfer control means.

As a result, the digital reproduction data read from the first storage means is transferred to the second storage means via the first and second memory control means, where it is transferred to the second storage means as dubbing data. Temporarily stored. Thereafter, the dubbing data is dubbed to the second recording medium in the same manner as described above.

As described above, at the time of the reproduction error, the transfer of the digital reproduction data from the first memory control means to the second storage means is stopped, so that the remaining amount of the digital reproduction data stored in the first storage means is reduced. Since it is avoided that the amount of dubbing data stored in the second storage means becomes larger than the predetermined amount, the continuity of the dubbing data can be reliably maintained. Become.
Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for any reason during the dubbing operation, the digital reproduction data is continuously stored in the first storage means, and the digital reproduction data stored in the first storage means is not stored. The data is transferred to the second storage means, but the dubbing data in the second storage means is not dubbed to the second recording medium.

That is, even during a recording error period, digital reproduction data is read from the first storage means and transferred to the second storage means as usual, where it is stored as dubbing data in the second storage means. However, since no dubbing operation is performed on the second recording medium, the remaining amount of dubbing data stored in the second storage means does not decrease,
To increase. Eventually, while these actions are being taken,
When it is detected that the remaining amount of the dubbing data stored in the second storage means is equal to or more than a predetermined amount, the transfer of the digital reproduction data from the first memory control means to the second memory control means is performed by the data transfer control means. Stopped by

After that, when the normal state is restored from the recording error, the dubbing of the dubbing data temporarily stored in the second storage means to the second recording medium is restarted. At this stage,
Although the transfer of the digital reproduction data from the first memory control means to the second memory control means is still stopped by the data transfer control means, the remaining amount of the dubbing data stored in the second storage means is not sufficient for the dubbing operation. When it is detected that it is less than the above-mentioned predetermined amount, the transfer of digital reproduction data from the first memory control means to the second storage means is restarted by the data transfer control means.

As a result, the digital reproduction data read from the first storage means is transferred from the first memory control means to the second memory control means, where it is temporarily stored as dubbing data. Then, the dubbing data is dubbed to the second recording medium.

As described above, when the transfer of the digital reproduction data from the first memory control means to the second memory control means is stopped at the time of the recording error, the remaining amount of the digital reproduction data stored in the first storage means is obtained. Is less than the predetermined amount, and the remaining amount of dubbing data stored in the second storage means is reliably prevented from becoming larger than the predetermined amount.
It is possible to reliably maintain the continuity of the dubbing data. Moreover, in this case, it is not necessary to redo the operations of the recording system and the reproducing system.

[0071]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, audio data generated from a continuous digital audio signal such as audio information recorded on a recording medium is compressed, temporarily stored in a shock-proof memory (buffer memory), and temporarily stored. The present invention relates to a digital dubbing apparatus for intermittently reading compressed data from a memory and dubbing the data to another recording medium, and particularly to dubbing audio information from a compact disk to a minidisk.

The digital dubbing apparatus according to the present embodiment has, for example, a configuration as shown in FIG. In the present embodiment, as an example, a CD playback system that plays back audio information from a CD playback device, and an MD recording system that records audio information on an MD in an MD recording device are provided. The following describes a digital dubbing apparatus configured to be able to dub.

FIG. 1 shows a configuration example of the digital dubbing apparatus (a configuration example for dubbing from a CD to an MD). Members having the same functions as those in FIG. 6 described above are denoted by the same reference numerals.

As shown in FIG. 1, the digital dubbing apparatus mainly comprises a CD reproducing apparatus 1 ', an MD recording apparatus 6', remaining data detectors 12 and 13 (data transfer control means), and a transfer request controller. 14 (data transfer control means)
It consists of

The CD reproducing apparatus 1 'intermittently reads digital reproduction data from the CD disk 2 via the CD reproduction signal processor 3, and intermittently reads the read digital reproduction data from the shockproof memory 5' (the 1 storage means) and a shock-proof memory controller 4 '(first memory control means) for temporarily storing the data.

The MD recording device 6 ′ comprises a voice compressor 7 for compressing the digital reproduction data of the shock proof memory 5 ′ transferred via the shock proof memory controller 4 ′ and outputting it as dubbing data; The data is stored in the shockproof memory 9 '(second
Storage means), and at the same time, dubbing data is read out intermittently from the shock proof memory 9 ',
This is transferred to the MD disc 1 via the MD recording signal processor 10.
1 is provided with an MD recording device 6 'having a shock-proof memory controller 8 (second memory control means) for sequentially dubbing.

The data remaining amount detector 12 detects that the remaining amount of digital reproduction data stored in the shock proof memory 5 ′ is less than a predetermined amount, and sends the detection result to the transfer request controller 14. The data remaining amount detector 13 includes:
It detects that the remaining amount of dubbing data stored in the shock proof memory 9 ′ is equal to or more than a predetermined amount, and sends the detection result to the transfer request controller 14. The transfer request controller 14
Based on the detection results of the data remaining amount detectors 12 and 13, stop and restart of the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 are controlled.

The data remaining amount detector 12 monitors the address of the shock proof memory 5 'of the CD reproducing apparatus 1', and based on the address, the remaining amount of the digital reproduction data stored in the shock proof memory 5 '. Has the ability to detect. Similarly, the data remaining amount detector 13 outputs M
It has a function of monitoring the address of the shock proof memory 9 'of the D recording device 6' and detecting the remaining amount of dubbing data stored in the shock proof memory 9 'based on the address.

The detection of the remaining digital reproduction data and the remaining dubbing data by the remaining data detectors 12 and 13 is not particularly limited. For example, the remaining data detectors 12 and 13 monitor the addresses of the shock proof memories 5 ′ and 9 ′, respectively, and detect the remaining addresses of the data, thereby detecting the remaining amounts of the digital reproduction data and the dubbing data. It is possible to

The transfer request controller 14 determines whether the remaining amount of the digital reproduction data stored in the shock proof memory 5 'is reduced to a predetermined amount or less, or the remaining amount of the dubbing data stored in the shock proof memory 9'. Is detected by the data remaining amount detector 12 or 13, the transfer request controller 14 outputs a transfer control signal e (in this case, a transfer stop request signal) to the shockproof memory. Output to the controller 4 '.

Upon receiving the transfer control signal e, the shock proof memory controller 4 ′ deactivates the data enable signal f to be sent to the audio compressor 7, and the audio compressor 7 keeps the dubbing data during that period. (Indicated by c in FIG. 1) is not supplied to the shockproof memory controller 8.

When receiving the transfer control signal e, the audio compressor 7 (shown by b in FIG. 1) of the digital reproduction data read from the shock proof memory 5 'via the shock proof memory controller 4'. Transfer to the compression means) is stopped.

When the digital playback data in the shock proof memory 5 'recovers due to an increase in the remaining amount, or when the dubbing data in the shock proof memory 9' recovers due to a decrease, the transfer control signal e (in this case) , A transfer start request signal) and digital reproduction data (FIG. 1) output from the shockproof memory controller 4 '.
(Indicated by b in FIG. 3) is resumed.

The transfer control signal e may be, for example, a binary logic high level corresponding to a transfer stop request signal, a low level corresponding to a transfer start request signal, or vice versa. May be. Alternatively, the transfer control signal e may be composed of two independent transfer stop request signals and a transfer start request signal.

By such an operation, the CD disk 2
1, that is, digital reproduction data (FIG. 1) which is processed by the CD reproduction signal processor 3 and output.
In this case, the intermittent ratio naturally changes. The remaining amount of digital reproduction data in the shock proof memory 5 'varies in the intermittent ratio so as not to overflow or underflow. The intermittent recording ratio on the MD disk 11, that is, the intermittent ratio of dubbing data (shown by d in FIG. 1) output from the shockproof memory controller 8 naturally changes. The intermittent ratio changes so that the shock proof memory 8 does not overflow or underflow.

FIG. 2 shows the time transition from the occurrence of the transfer stop request to the stop of the transfer of the digital reproduction data, and from the occurrence of the transfer start request to the restart of the transfer of the digital reproduction data. In FIG. 2, during the data transfer suspension period, the shock-proof memory controller 4 'makes the data enable signal f inactive (non-active), and during that period, the effective dubbing data (indicated by c in FIG. 1) is stored in the shock-proof memory. This indicates that the data is not supplied to the controller 8.

On the MD recording device 6 'side, only during the period when the data enable signal f is active, the audio compressor 7 compresses the digital reproduction data and converts it into dubbing data (indicated by c in FIG. 1). It is supplied to the controller 8.

Here, the operation of the digital dubbing apparatus will be described. Shockproof memory controller 4 '
Reads intermittently the digital reproduction data from the CD disk 2 via the CD reproduction signal processor 3 and temporarily stores the data in the shock proof memory 5 'intermittently. The digital reproduction data read from the shock proof memory 5 'is transferred to the audio compressor 7 via the shock proof memory controller 4', where the compressed data is transferred to the shock proof memory controller 8 as dubbing data. The data is temporarily stored in the shock proof memory 9 'through the memory. The dubbing data is sequentially read out intermittently from the shock proof memory 9 ′ via the shock proof memory controller 8, and is dubbed to the MD disk 11 via the MD recording signal processor 10.

If a reproduction error occurs for some reason during such dubbing operation, the digital reproduction data cannot be stored in the shock proof memory 5 'thereafter, while the recording error does not occur. The digital reproduction data stored in the shock proof memory 5 'is transferred to the audio compressor 7 via the shock proof memory controller 4', and the dubbing data is transferred to the MD via the MD recording signal processor 10 as described above. It is dubbed to the disk 11.

That is, during the period of the reproduction error, the digital reproduction data read from the CD disk 2 is not stored in the shock proof memory 5 ', but is stored in the shock proof memory 5' before the reproduction error occurs. The already reproduced digital reproduction data is read out and transferred to the audio compressor 7 via the shockproof memory controller 4 'as usual. As a result, the remaining amount of digital reproduction data stored in the shock proof memory 5 'decreases.
On the other hand, since the digital reproduction data transferred to the audio compressor 7 is compressed here and stored as dubbing data in the shock proof memory 9 ', the remaining amount of the dubbing data in the shock proof memory 9' increases. Then, dubbing data is read from the shock proof memory 9 ′, and the MD disc 1 is read via the shock proof memory controller 8 and the MD recording signal processor 10.
1 is dubbed.

While such an operation is being performed, the data remaining amount detector 12 will soon detect whether the remaining amount of digital reproduction data stored in the shock proof memory 5 'is less than a predetermined amount. Alternatively, when the remaining data amount detector 13 detects that the remaining amount of dubbing data stored in the shock proof memory 9 'is equal to or more than a predetermined amount, the transfer request controller 14 sends a transfer control signal e (in this case, A transfer stop request signal) is output to the shock proof memory controller 4 '.

Upon receiving the transfer control signal e, the shock proof memory controller 4 'deactivates the data enable signal f to be sent to the audio compressor 7, and the audio compressor 7 keeps the dubbing data during that period. (Indicated by c in FIG. 1) is not supplied to the shockproof memory controller 8 (second memory control means). When the transfer control signal e is received, the digital reproduction data (indicated by b in FIG. 1) read from the shock proof memory 5 'via the shock proof memory controller 4' is transferred to the audio compressor 7. Stopped.

Thereafter, upon normal recovery from the reproduction error, the intermittent reading of the digital reproduction data from the CD disk 2 is restarted and temporarily stored in the shockproof memory 5 '. At this stage, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 is still stopped by the transfer request controller 14, but the digital reproduction data stored in the shock proof memory 5' When the shock-proof memory controller 4 ′ detects that the data enable signal f to be sent to the audio compressor 7 is activated and the audio enable
Supplies dubbing data (indicated by c in FIG. 1) to the shockproof memory controller 8 (second memory control means).

In this way, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 is resumed by the transfer request controller 14, and as a result, the digital data read from the shock proof memory 5' The reproduced data is transferred from the shock-proof memory controller 4 'to the audio compressor 7, where the compressed data is temporarily stored in the shock-proof memory 9' as dubbing data. Hereinafter, in the same manner as described above,
The dubbing data is transmitted to the MD via the MD recording signal processor 10.
It is dubbed to the disk 11.

As described above, at the time of the reproduction error, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 is stopped, so that the remaining digital reproduction data stored in the shock proof memory 5' is left. Since the amount of the dubbing data is less than the predetermined amount and the remaining amount of the dubbing data stored in the shock proof memory 9 'is prevented from becoming larger than the predetermined amount, the continuity of the dubbing data is reliably maintained. Becomes possible. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for some reason during the dubbing operation, the digital reproduction data is continuously stored in the shock proof memory 5 'and the digital reproduction data stored in the shock proof memory 5' is stored. The data is transferred to the audio compressor 7, but the dubbing data in the shock proof memory 9 'is not dubbed to the MD disk 11.

That is, even during the recording error period, the digital reproduction data is read out from the shock proof memory 5 'and transferred to the audio compressor 7 as usual, and after being compressed, the data is compressed as dubbing data. 9 ′. However, since no dubbing operation is performed on the MD disk 11, the remaining amount of dubbing data stored in the shock proof memory 9 'increases without decreasing. During such an operation, when the data remaining amount detector 13 detects that the remaining amount of dubbing data stored in the shock proof memory 9 'is equal to or more than a predetermined amount, the shock proof memory controller The transfer of the digital reproduction data from 4 'to the audio compressor 7 is stopped by the transfer request controller 14.

Thereafter, when the recording error is restored to normal, the dubbing of the dubbing data temporarily stored in the shock proof memory 9 'to the MD disk 11 is resumed. At this stage, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 is still stopped by the transfer request controller 14, but the transfer of the dubbing data stored in the shock proof memory 9' is still in progress. When the remaining amount decreases and is detected by the data remaining amount detector 13 to be less than the predetermined amount, the transfer of the digital reproduction data from the shock proof memory controller 4 ′ to the audio compressor 7 is performed by the transfer request controller 14. Will be resumed by

As a result, the digital reproduction data read from the shock proof memory 5 'is transferred from the shock proof memory controller 4' to the audio compressor 7, where the compressed data is converted into dubbing data. 9 ', and the dubbing data is dubbed onto the MD disc 11 in the same manner as described above.

As described above, when the recording error occurs, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 is stopped, so that the remaining digital reproduction data stored in the shock proof memory 5' is left. Since the amount of the dubbing data is less than the predetermined amount and the remaining amount of the dubbing data stored in the shock proof memory 9 'is prevented from becoming larger than the predetermined amount, the continuity of the dubbing data is reliably maintained. Becomes possible. Moreover, in this case, it is not necessary to redo the operations of the recording system and the reproducing system.

As described above, according to the digital dubbing apparatus, if the data transfer order, data loss, and data duplication are continuous before and after the data transfer suspension period, the data transfer suspension period is time-dependent. Even if it becomes longer,
There is no problem in the dubbing operation. Therefore, it is not necessary to discard the recorded portion and perform dubbing again from the beginning of the music.

In the above description, the data remaining amount detectors 12, 1
3 has been described separately, but the present invention is not limited to this. The present invention is configured by one memory remaining amount detector, and both the shock proof memory 5 ′ and the shock proof memory 9 ′ are provided. It is also possible to detect the remaining amount of memory.

FIG. 3 shows a configuration example of another digital dubbing apparatus according to the present invention (a configuration example capable of dubbing from a CD to an MD). Members having the same functions as those in FIG. 1 are denoted by the same reference numerals, and detailed description will be omitted.

The digital dubbing apparatus shown in FIG.
A CD player 1a 'obtained by removing the shock proof memory controller 4' and the shock proof memory 5 'from the player 1' is referred to as a CD player 1a '.
Is not provided, and the digital reproduction data from the CD disk 2 is sent to the reproduction data transfer controller 20 (reproduction data transfer control means) via the CD reproduction signal processor 3, and the reproduction data transfer controller 20 It differs from the digital dubbing apparatus of FIG. 1 in that data is transferred between the transfer request controller 14 and the voice compressor 7 instead of the shock proof memory controller 4 '.

As shown in FIG. 3, the data remaining amount detector 13 monitors the address of the shock proof memory 9 'of the MD recording device 6', and the dubbing data stored in the shock proof memory 9 'exceeds a predetermined amount. It has a function to detect many things. When the data remaining amount detector 13 detects that the remaining amount of the dubbing data stored in the shock proof memory 9 'is larger than a predetermined amount, the transfer request controller 14 sends the reproduction data transfer controller 20 And C
A request is made to stop the transfer of the digital reproduction data read from the D disk 2. As a result, the supply of the dubbing data (indicated by c in FIG. 3) from the voice compressor 7 to the shockproof memory controller 8 is stopped, and the remaining amount of the shockproof memory 9 'is reduced to less than a predetermined amount and recovered. Thereafter, the transfer stop is released, the transfer of the digital reproduction data is restarted, and the state returns to the normal state.

Here, the operation of the digital dubbing apparatus will be described. The reproduction data transfer controller 20 reads the digital reproduction data from the CD disk 2 and transfers it to the audio compressor 7, where the compressed data is temporarily stored in the shock proof memory 9 'as dubbing data. The dubbing data is sequentially read out intermittently from the shock proof memory 9 ′ via the shock proof memory controller 8, and is dubbed to the MD disk 11 via the MD recording signal processor 10.

If a reproduction error occurs during the dubbing operation for some reason, the digital reproduction data is stored in the C.
The dubbing data is dubbed to the MD disk 11 by the shock proof memory controller 8 as described above, as long as no recording error occurs while the data is not read from the D disk 2.

That is, during the period of the reproduction error, the digital reproduction data is not read from the CD disk 2. However, since the dubbing data stored before the reproduction error occurs exists in the shock proof memory 9 ', The dubbing data is read out from the shock proof memory 9 ′ via the shock proof memory controller 8,
It is dubbed to the MD disk 11 via the D recording signal processor 10.

[0110] Thereafter, when the operation returns to the normal state from the reproduction error, the reading of the digital reproduction data from the CD disk 2 is restarted. The digital reproduction data read in this way is transferred to the audio compressor 7 via the reproduction data transfer controller 20, where the compressed data is temporarily stored in the shock proof memory 9 'as dubbing data. It is memorized. Accordingly, the amount of dubbing data stored in the shock proof memory 9 ′ increases, and when it is detected by the data remaining amount detector 13 that the amount is equal to or larger than the predetermined amount, the transfer request controller 14 controls the transfer control. A signal e (in this case, a transfer stop request signal) is output to the reproduction data transfer controller 20.

When receiving the transfer control signal e, the reproduction data transfer controller 20 makes the data enable signal f to be sent to the audio compressor 7 inactive (non-active), and the audio compressor 7 (Indicated by c in FIG. 3).
Will not be supplied.

When the transfer control signal e is received, digital reproduction data (indicated by b in FIG. 3) read from the CD disk 2 is transferred to the audio compressor 7 via the reproduction data transfer controller 20. Is stopped. Unless a recording error occurs during this transfer suspension, the second
As described above, the dubbing data stored in the shock proof memory 9 'is dubbed to the MD disk 11 by the memory control means.

When the remaining amount of the dubbing data stored in the shock proof memory 9 'decreases and recovers with the dubbing operation, a transfer control signal e (in this case, a transfer start request signal) is output, and the reproduction is performed. Data transfer controller 20
The transfer of the digital reproduction data (indicated by b in FIG. 3) output from is resumed.

The transfer control signal e may be, for example, such that a high level in binary logic corresponds to a transfer stop request signal, and a low level corresponds to a transfer start request signal, or vice versa. May be. Alternatively, the transfer control signal e may be two independent transfer stop request signals and transfer start request signals.

As described above, it is possible to reliably prevent the remaining amount of dubbing data in the shock proof memory 9 'from exceeding a predetermined amount during reproduction, so that the continuity of dubbing data can be reliably maintained. Become. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs during the dubbing operation for some reason, dubbing cannot be performed. However, as long as no reproduction error has occurred, digital reproduction data read from the CD disk 2 is used for reproduction data transfer control. Is transferred to the audio compressor 7 via the device 20. After being compressed by the audio compressor 7, the data is temporarily stored as dubbing data in the shock proof memory 9 'via the shock proof memory controller 8, but dubbing to the MD disk 11 is not performed. Therefore, the amount of dubbing data stored in the shock proof memory 9 'increases,
When the data remaining amount detector 13 detects that the amount is equal to or more than the predetermined amount, the transfer of the digital reproduction data from the reproduction data transfer controller 20 to the audio compressor 7 is stopped.

Thereafter, when the recording error is restored to normal, the dubbing of the dubbing data temporarily stored in the shock proof memory 9 'to the MD disk 11 is resumed. At this stage, the transfer of the digital reproduction data from the reproduction data transfer controller 20 to the audio compressor 7 is still stopped by the transfer request controller 14, but the dubbing data already stored in the shock proof memory 9 'is not yet transferred. When it is detected that the remaining amount decreases with the dubbing operation and is less than the predetermined amount, the transfer of the digital reproduction data from the reproduction data transfer controller 20 to the audio compressor 7 is restarted by the transfer request controller 14. Is done.

As a result, the digital reproduction data read from the CD disk 2 is transferred from the reproduction data transfer controller 20 to the audio compressor 7, where the compressed data is transferred as dubbing data to the shockproof memory 9 '. The dubbing data is dubbed to the MD disc 11 in the same manner as described above.

As described above, when the recording error occurs, the transfer of the digital reproduction data from the reproduction data transfer controller 20 to the audio compressor 7 stops, so that the remaining amount of the dubbing data stored in the shock proof memory 9 'is obtained. Is reliably prevented from becoming larger than the predetermined amount, so that the continuity of the dubbing data can be reliably maintained. Moreover, in this case, it is not necessary to redo the operations of the recording system and the reproducing system.

Although the above description has been made with respect to the dubbing of audio information from a CD to an MD, the present invention is not limited to this. Dubbing of audio information from an MD to an MD and audio information dubbing from a CD to a CD are described. May be adopted.

When dubbing from MD to MD is performed, as shown in FIG. 4, an MD reproducing apparatus 1 ″ is provided in place of the CD reproducing apparatus 1 ′ having the configuration shown in FIG. "Denotes the CD disk 2 of the CD player 1 '.
Is provided with an MD disk 2 'instead of the CD playback signal processor 3, and an MD playback signal processor 3' is provided instead of the CD playback signal processor 3.
The compressed digital reproduction data read from the MD disc 2 'is decompressed by a decompression circuit 21 (decompression means),
The data is transferred to the audio compressor 7 in the MD recording device 6 '. Other configurations are the same as those in FIG. 1, and thus detailed description of these other configurations will be omitted.

According to the digital dubbing apparatus, the shock-proof memory controller 4 'intermittently reads out the compressed digital reproduction data from the MD disk 2' and temporarily stores the data in the shock-proof memory 5 'intermittently. The compressed digital reproduction data read from the shock proof memory 5 'via the shock proof memory controller 4' is decompressed by the decompression circuit 21 and then transferred to the audio compressor 7, where it is compressed. The data is temporarily stored as dubbing data in the shock-proof memory 9 'via the shock-proof memory controller 8. The dubbing data is sequentially and intermittently read from the shock proof memory 9 ′ via the shock proof memory controller 8,
Is dubbed.

If a reproduction error occurs during this dubbing operation for some reason, it becomes impossible to store the compressed digital reproduction data in the shock proof memory 5 ', while a recording error occurs. Unless the compressed digital reproduction data stored in the shockproof memory 5 'is expanded by the expansion circuit 21, the compressed digital reproduction data is transferred to the audio compressor 7, and the dubbing data is stored in the M
Dubbed to the D disk 11.

That is, during the period of the reproduction error, the compressed digital reproduction data read from the MD disc 2 'is not stored in the shock proof memory 5'.
The compressed digital reproduction data stored in the shock proof memory 5 'before the reproduction error occurs is read out via the shock proof memory controller 4' and expanded by the expansion circuit 21 as usual, and then the audio compressor 7 is transferred. As a result, the remaining amount of the compressed digital reproduction data stored in the shock proof memory 5 'decreases. On the other hand, the decompressed digital reproduction data transferred to the audio compressor 7 is compressed here, and is stored as dubbing data in the shock proof memory 9 ′ via the shock proof memory controller 9. The remaining amount of 9 'dubbing data increases. Then, dubbing data is read from the shock proof memory 9 ′ and dubbed to the MD disk 11 via the shock proof memory controller 8.

While such an operation is being performed, the remaining amount of the compressed digital reproduction data stored in the shock proof memory 5 ′ is less than or equal to a predetermined amount, or the compressed digital reproduction data stored in the shock proof memory 9 ′ is soon. When it is detected that the remaining amount of dubbing data is equal to or more than the predetermined amount, the transfer request controller 14 sends a transfer control signal e (in this case, a transfer stop request signal) to the shockproof memory controller 4 ′.
Output.

Upon receiving the transfer control signal e, the shock proof memory controller 4 'deactivates the data enable signal f to be sent to the audio compressor 7 (non-active), and the audio compressor 7 (Indicated by c in FIG. 1) is not supplied to the shockproof memory controller 8 (second memory control means).

When the transfer control signal e is received, the transfer of the expanded digital reproduction data (indicated by b in FIG. 4) from the expansion circuit 21 to the audio compressor 7 (compression means) is stopped.

Thereafter, upon normal recovery from the reproduction error, the intermittent readout of the compressed digital reproduction data from the MD disk 2 'is restarted and temporarily stored in the shock proof memory 5'. At this stage, the transfer of the expanded digital reproduction data from the shock proof memory controller 4 ′ to the audio compressor 7 via the expansion circuit 21 is still stopped by the transfer request controller 14. When the amount of compressed digital reproduction data stored in the memory 5 'is gradually increased and is detected by the data remaining amount detector 12 to be larger than the predetermined amount, the shockproof memory controller 4' sends the data via the expansion circuit 21 via the expansion circuit 21. The transfer of the decompressed digital reproduction data to the audio compressor 7 is performed by the transfer request controller 1
4 restarts.

As a result, the compressed digital reproduction data read from the shock proof memory 5 ′ via the shock proof memory controller 4 ′ is
After being decompressed, the data is transferred to the audio compressor 7, where the compressed data is temporarily stored in the shock proof memory 9 'as dubbing data. Thereafter, the dubbing data is dubbed to the MD disc 11 in the same manner as described above.

As described above, when the reproduction error occurs, the transfer of the decompressed digital reproduction data from the shock proof memory controller 4 'to the audio compressor 7 via the decompression circuit 21 is stopped, whereby the shock proof memory 5 Since the remaining amount of the compressed digital reproduction data stored in the shock-proof memory 9 'is reliably prevented from becoming smaller than the predetermined amount, and the remaining amount of the dubbing data stored in the shock-proof memory 9' becomes larger than the predetermined amount. Therefore, it is possible to reliably maintain the continuity of the dubbing data. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for some reason during the dubbing operation, the compressed digital reproduced data is continuously stored in the shock-proof memory controller 4 'through the shock-proof memory controller 4'. The digital reproduction data stored in the shock proof memory 5 'is expanded by the expansion circuit 21 and then transferred to the audio compressor 7, but in this case, the dubbing data in the shock proof memory 9' is not dubbed to the MD disk 11. .

That is, even during the recording error period, the compressed digital reproduction data is read out from the shock proof memory 5 'via the shock proof memory controller 4' and decompressed by the decompression circuit 21 as usual. The data is transferred to the compressor 7, where it is compressed and stored as dubbing data in the shockproof memory 9 '.
However, since no dubbing operation is performed on the MD disk 11, the remaining amount of dubbing data stored in the shock-proof memory 9 'increases without decreasing.
During such an operation, when it is detected that the remaining amount of the dubbing data stored in the shock proof memory 9 'is equal to or more than a predetermined amount, the expansion circuit 21 is sent from the shock proof memory controller 4'. The transfer request controller 14 stops the transfer of the decompressed digital reproduction data to the audio compressor 7 through the transfer request controller 14.

Thereafter, when the recording error is restored to normal, the dubbing of the dubbing data temporarily stored in the shock proof memory 9 'to the MD disk 11 is resumed. At this stage, the transfer of the expanded digital reproduction data from the shock proof memory controller 4 ′ to the audio compressor 7 via the expansion circuit 21 is still stopped by the transfer request controller 14. When the remaining amount of the compressed dubbing data stored in the memory 9 'decreases with the restart of the dubbing operation and is detected by the data remaining amount detector 13 to be less than the predetermined amount, the shock proof memory controller 4 Then, the transfer request controller 14 restarts the transfer of the expanded digital reproduction data to the audio compressor 7 through the expansion circuit 21.

As a result, the compressed digital reproduction data read from the shock proof memory 5 'is decompressed by the decompression circuit 21 and then transferred to the audio compressor 7, where the compressed data is transferred to the dubbing data. The dubbing data is dubbed to the MD disc 11 in the same manner as described above.

As described above, when a recording error occurs, the transfer of the expanded digital reproduction data from the shock proof memory controller 4 ′ to the audio compressor 7 via the expansion circuit 21 is stopped, whereby the shock proof memory 5 is stopped. Since the remaining amount of the compressed digital reproduction data stored in the shock-proof memory 9 'is reliably prevented from becoming smaller than the predetermined amount, and the remaining amount of the dubbing data stored in the shock-proof memory 9' becomes larger than the predetermined amount. Therefore, it is possible to reliably maintain the continuity of the dubbing data. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

By the way, when dubbing from a CD to a CD, as shown in FIG. 5, a CD recording device 6 ″ is provided instead of the MD recording device 6 ′ of the configuration of FIG.
This CD recording device 6 ″ is an MD of the MD recording device 6 ′.
A CD disk 11 'is provided in place of the disk 11, and M
CD recording signal processor 1 instead of D recording signal processor 10
0 'is provided. Also, this CD recording device 6 "includes:
Since the audio compressor 7 of the MD recording device 6 'is not provided, the digital reproduction data read from the shock proof memory 5' is sent to the shock proof memory controller 8. Other configurations are the same as those in FIG. 1, and thus detailed description of these other configurations will be omitted.

According to this digital dubbing apparatus, the shock proof memory controller 4 ′ intermittently reads digital reproduction data from the CD disk 2 via the CD reproduction signal processor 3 and intermittently reads the digital reproduction data into the shock proof memory 5 ′. Store it temporarily. The digital reproduction data continuously read from the shock proof memory 5 'via the shock proof memory controller 4' is transferred to the shock proof memory 9 'via the shock proof memory controller 8, where it is used as dubbing data. Are temporarily stored in the shock proof memory 9 '. The dubbing data is read out intermittently from the shock proof memory 9 'via the shock proof memory controller 8 and dubbed to the CD disk 11' via the CD recording signal processor 10 '.

If a reproduction error occurs during this dubbing operation for some reason, it becomes impossible to store the digital reproduction data in the shock proof memory 5 'thereafter, while unless a recording error occurs. Is transferred to the shock proof memory 9 'via the shock proof memory controller 4', as described above.
The dubbing data is transferred to C via the CD recording signal processor 10 '.
It is dubbed to the D disk 11 '.

That is, during the period of the reproduction error, the digital reproduction data read from the CD disk 2 is not stored in the shock proof memory 5 ', but is stored in the shock proof memory 5' before the reproduction error occurs. The completed digital reproduction data is read out as usual, transferred to the shockproof memory controller 8 via the shockproof memory controller 4 ', and temporarily stored in the shockproof memory 9'. As a result, the remaining amount of digital reproduction data stored in the shock proof memory 5 'decreases. On the other hand, the digital reproduction data transferred to the shock proof memory 9 'is stored here as dubbing data.
The remaining amount of dubbing data increases. Then, the dubbing data is read from the shock proof memory 9 ′, and via the shock proof memory controller 8,
After the signal is processed by the CD recording signal processor 10 ', it is dubbed to a CD disk 11'.

While such an operation is being performed, the remaining amount of the digital reproduction data stored in the shock proof memory 5 ′ will soon be less than or equal to the predetermined amount, or the dubbing data stored in the shock proof memory 9 ′ will be shortly reached. When the data remaining amount detector 12 or 13 detects whether the remaining amount of the data is equal to or more than the predetermined amount, the transfer request controller 14 shocks the transfer control signal e (in this case, the transfer stop request signal). The data is output to the proof memory controller 4 '.

Upon receiving the transfer control signal e, the shock proof memory controller 4 ′ deactivates the data enable signal f to be sent to the shock proof memory controller 8, and the shock proof memory controller 8 The dubbing data is no longer supplied to the shockproof memory 9 '.

When receiving the transfer control signal e, the shock proof memory controller 8 of the digital reproduction data (indicated by b in FIG. 1) read from the shock proof memory 5 'via the shock proof memory controller 4'. The transfer to is stopped.

Thereafter, upon normal recovery from the reproduction error, the intermittent reading of the digital reproduction data from the CD disk 2 is restarted and temporarily stored in the shock proof memory 5 '. At this stage, the transfer of the digital reproduction data from the shock proof memory controller 4 ′ to the shock proof memory controller 8 is still stopped by the transfer request controller 14, but the digital reproduction data stored in the shock proof memory 5 ′ is still present. When the data amount gradually increases and is detected by the data remaining amount detector 12 to be larger than the predetermined amount, the first memory control means transfers the digital reproduction data from the shockproof memory controller 4 'to the shockproof memory controller 8. The transfer is resumed by the transfer request controller 14.

As a result, the digital reproduction data read from the shock proof memory 5 'is transferred from the shock proof memory controller 4' to the shock proof memory controller 8, and is temporarily stored in the shock proof memory 9 'as dubbing data. . Thereafter, the dubbing data is transferred to the CD recording signal processor 1 in the same manner as described above.
0 'is dubbed to the CD disk 11'.

As described above, when the transfer of the digital reproduction data from the shock proof memory controller 4 'to the shock proof memory controller 8 is stopped at the time of the reproduction error, the digital reproduction data stored in the shock proof memory 5' is deleted. Since the remaining amount is less than the predetermined amount and the remaining amount of the dubbing data stored in the shock proof memory 9 'is reliably prevented from becoming larger than the predetermined amount, the continuity of the dubbing data is reliably maintained. It becomes possible. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

On the other hand, if a recording error occurs for some reason during the dubbing operation, the digital reproduction data is continuously stored in the shock proof memory 5 ', and the digital reproduction data stored in the shock proof memory 5' is stored. The data is transferred to the shock proof memory 9 '.
No dubbing is performed on the D disk 11 '.

That is, even during the recording error period, the digital reproduction data is read from the shock proof memory 5 'and transferred to the shock proof memory 9' as usual, where it is stored as dubbing data. However, since no dubbing operation is performed on the CD disk 11 ', the remaining amount of dubbing data stored in the shock proof memory 9' increases without decreasing. During this operation, when it is detected that the remaining amount of the dubbing data stored in the shock proof memory 9 'is equal to or larger than a predetermined amount, the shock proof memory controller 4' sends the shock proof memory controller 4 '. 8 is stopped by the transfer request controller 14.

Thereafter, when the recording error is restored to normal, the dubbing of the dubbing data temporarily stored in the shock proof memory 9 'to the CD disk 11' is resumed. At this stage, the transfer of the digital reproduction data from the shock proof memory controller 4 'to the shock proof memory controller 8 is still stopped by the transfer request controller 14, but the dubbing data already stored in the shock proof memory 9' When the remaining data amount decreases with the restart of the dubbing operation and is detected by the data remaining amount detector 13 to be less than the predetermined amount, digital reproduction from the shock-proof memory controller 4 'to the shock-proof memory controller 8 is performed. Data transfer is resumed by the transfer request controller 14.

As a result, the digital reproduction data read from the shock proof memory 5 'is transferred from the shock proof memory controller 4' to the shock proof memory controller 8, and is temporarily stored in the shock proof memory 9 'as dubbing data. Thereafter, in the same manner as described above, the dubbing data is stored on the CD disk 11 '.
Is dubbed.

As described above, when the transfer of the digital reproduction data from the shock proof memory controller 4 'to the shock proof memory controller 8 is stopped at the time of the recording error, the digital reproduction data already stored in the shock proof memory 5' is stopped. Since the remaining amount is less than the predetermined amount and the remaining amount of the dubbing data stored in the shock proof memory 9 'is reliably prevented from becoming larger than the predetermined amount, the continuity of the dubbing data is reliably maintained. It becomes possible. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system.

By the way, as described above, many of the recent CD reproducing devices and MD recording / reproducing devices are equipped with a so-called shock-proof memory. Processing is performed so that no sound interruption occurs. According to the present invention, as described above, the transfer or stop of the digital data sent from the reproduction system to the recording system is controlled by the remaining amount of the shock proof memory.

Therefore, even if an error occurs while the digital data of the first recording medium is being dubbed to the second recording medium, the recording medium which is discontinuous to the recording data with simple control contents, It is possible to prevent data that has not been recorded from being inserted. Therefore, there is no need to redo the operations of the reproducing system and the recording system when an error occurs.

In the prior art, dubbing had to be repeated again because sound breakage occurred. However, according to the present invention, data continuity is maintained with a simple circuit configuration,
Dubbing can be performed without having to start over.

In the above description, 1 × speed dubbing is described. However, the present invention is more effective at 4 × speed dubbing. At the time of quadruple speed dubbing, the transfer rate of data transferred from the CD playback device to the MD recording device is quadrupled. However, the writing speed of the MD disk remains at 1 × speed. That is, the data rate written to the shock proof memory and the data rate read out become substantially equal, which means that the shock proof capability is lost. According to the present invention, even in such a case, dubbing can be performed without having to start over.

[0155]

According to the digital dubbing apparatus of the present invention,
As described above, the first memory control means for intermittently reading digital reproduction data from the first recording medium and temporarily storing the read digital reproduction data intermittently in the first storage means, and the first memory control means Compression means for compressing the digital reproduction data of the first storage means transferred via the first storage means and outputting the data as dubbing data; and temporarily storing the dubbing data in the second storage means;
A second memory control unit for intermittently reading dubbing data from the second storage unit and sequentially dubbing the dubbing data to a second recording medium; and determining whether a remaining amount of digital reproduction data in the first storage unit is equal to or less than a predetermined amount. Alternatively, when it is detected that the remaining amount of the dubbing data in the second storage means is equal to or more than a predetermined amount, the data transfer control means for stopping the transfer of the digital reproduction data from the first memory control means to the compression means may include Have.

Therefore, even if a reproduction error or a recording error occurs during dubbing operation for some reason, the remaining amount of digital reproduction data stored in the first storage means is equal to or less than a predetermined amount, When it is detected that the remaining amount of the dubbing data stored in the storage unit is equal to or more than a predetermined amount, the transfer of the digital reproduction data from the first memory control unit to the compression unit is stopped by the data transfer control unit. You. Therefore, at the time of a reproduction error, the remaining amount of the digital reproduction data stored in the first storage means may be less than the predetermined amount, and the remaining amount of the dubbing data stored in the second storage means may be larger than the predetermined amount. It is definitely avoided,
It is possible to reliably maintain the continuity of the dubbing data. Moreover, in this case, it is not necessary to redo the operations of the reproducing system and the recording system, so that a digital dubbing apparatus excellent in operability can be reliably provided.

[0157] As described above, another digital dubbing apparatus according to the present invention reads out digital reproduction data from the first recording medium and transfers the read digital reproduction data to the digital dubbing apparatus. Compression means for compressing the digital reproduction data transferred via the control means and outputting the data as dubbing data; temporarily storing the dubbing data in the second storage means; and intermittently storing the dubbing data from the second storage means. A second memory control means for sequentially dubbing the data and sequentially dubbing the read data to a second recording medium; and detecting that the remaining amount of dubbing data in the second storage means is equal to or more than a predetermined amount. Data transfer control means for stopping the transfer of the digital reproduction data to the compression means.

Therefore, even if a reproduction error or a recording error occurs for some reason during the dubbing operation, the remaining amount of dubbing data in the second storage means can be reliably prevented from exceeding the predetermined amount. Data continuity can be reliably maintained. In addition, in this case, it is not necessary to redo the operations of the reproducing system and the recording system, so that the digital dubbing apparatus excellent in operability can be reliably provided.

As described above, still another digital dubbing apparatus according to the present invention intermittently reads compressed digital reproduction data from the first recording medium and intermittently stores the compressed digital reproduction data in the first storage medium. First memory control means for temporarily storing the compressed digital reproduction data read from the first storage means via the first memory control means, and decompression means for outputting the data.
A compression means for compressing the decompressed digital reproduction data by the decompression means and outputting the data as dubbing data; and temporarily storing the dubbing data in a second storage means.
A second memory control unit for intermittently reading dubbing data from the storage unit and sequentially dubbing the dubbing data to a second recording medium; and a condition that the remaining amount of the compressed digital reproduction data in the first storage unit is equal to or less than a predetermined amount. Upon detecting that the remaining amount of dubbing data in the second storage means is equal to or greater than a predetermined amount,
Data transfer control means for stopping the transfer of the expanded digital reproduction data from the first memory control means to the compression means via the expansion means.

Therefore, even if a reproduction error or a recording error occurs during dubbing operation for some reason, the remaining amount of the compressed digital reproduction data stored in the first storage means becomes less than a predetermined amount; and Since the remaining amount of dubbing data stored in the second storage means is reliably prevented from becoming larger than a predetermined amount, continuity of dubbing data can be reliably maintained. In addition, in this case, it is not necessary to redo the operations of the reproducing system and the recording system, so that the digital dubbing apparatus excellent in operability can be reliably provided.

As described above, another digital dubbing apparatus according to the present invention intermittently reads digital reproduction data from the first recording medium and temporarily stores the read digital reproduction data intermittently in the first storage means. A first memory control means for causing the digital reproduction data continuously transferred via the first memory control means to be temporarily stored in the second storage means as dubbing data; A second memory control unit for intermittently reading dubbing data from the storage unit and dubbing the dubbing data sequentially to a second recording medium; and a digital reproduction data remaining amount in the first storage unit being equal to or less than a predetermined amount, or (2) When it is detected that the remaining amount of dubbing data in the storage means is equal to or more than a predetermined amount, the first memory control means transmits the data to the second memory control means. And a data transfer control means for stopping the transfer of the digital reproduction data.

Therefore, even if a reproduction error or a recording error occurs during dubbing operation for some reason, the transfer of the digital reproduction data from the first memory control means to the second memory control means is stopped. Since the remaining amount of the digital reproduction data stored in the first storage means is less than the predetermined amount and the remaining amount of the dubbing data stored in the second storage means is reliably prevented from being larger than the predetermined amount.
It is possible to reliably maintain the continuity of the dubbing data. In addition, in this case, it is not necessary to redo the operations of the reproducing system and the recording system, so that the digital dubbing apparatus excellent in operability can be reliably provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a digital dubbing device according to the present invention.

FIG. 2 is an explanatory diagram showing a time transition from a transfer stop request occurrence to a stop of digital reproduction data transfer and a transfer start request generation to a digital reproduction data transfer restart in the digital dubbing apparatus.

FIG. 3 is a block diagram illustrating a configuration example of another digital dubbing device according to the present invention.

FIG. 4 is a block diagram showing a configuration example of still another digital dubbing device according to the present invention.

FIG. 5 is a block diagram showing a configuration example of another digital dubbing device according to the present invention.

FIG. 6 is a block diagram illustrating a configuration example of a conventional recording and reproducing device.

FIG. 7 is an explanatory diagram showing a lapse of time of a storage amount of digital reproduction data in a shock proof memory of the CD reproduction device in the recording / reproduction device of FIG. 6;

8 is an explanatory diagram showing a lapse of time of a storage amount of dubbing data in a shock proof memory of the MD recording device in the recording and reproducing device of FIG. 6;

FIG. 9 is a block diagram illustrating a configuration example of another conventional recording / reproducing apparatus.

[Explanation of symbols]

1 'CD playback device 2 CD disk (first recording medium) 4' shock-proof memory controller (first memory control means) 5 'shock-proof memory (first storage means) 7 audio compressor (compression means) 8 shock-proof memory Controller (second memory control means) 9 'Shockproof memory (second storage means) 11 MD disk (second recording medium) 12 Remaining data detector (data transfer control means) 13 Remaining data detector (data transfer control) Means) 14 transfer request controller (data transfer control means)

Claims (4)

[Claims] A first memory control means for intermittently reading digital reproduction data from a first recording medium and intermittently temporarily storing the read digital reproduction data in a first storage means; Compression means for compressing the digital reproduction data transferred from the first storage means and outputting the data as dubbing data, and temporarily storing the dubbing data in the second storage means, and dubbing from the second storage means. A second memory control means for intermittently reading data and sequentially dubbing the data to a second recording medium; or a digital reproduction data remaining in the first storage means being equal to or less than a predetermined amount, or a second storage means. When detecting that the remaining amount of the dubbing data is equal to or more than a predetermined amount, the transfer of the digital reproduction data from the first memory control means to the compression means is performed. Digital dubbing device and a data transfer control means for stopping. 2. A reproduction data transfer control means for reading digital reproduction data from a first recording medium and transferring the read digital reproduction data, and a digital data reproduction control means for transmitting the digital reproduction data transferred via the reproduction data transfer control means. Compression means for compressing and outputting as dubbing data; temporarily storing the dubbing data in the second storage means; intermittently reading dubbing data from the second storage means; and sequentially dubbing the dubbing data to the second recording medium. Second memory control means, and data for stopping transfer of digital reproduction data from the reproduction data transfer control means to the compression means when detecting that the remaining amount of dubbing data in the second storage means is equal to or greater than a predetermined amount. A digital dubbing device comprising a transfer control unit. 3. A first memory control means for intermittently reading compressed digital reproduction data from a first recording medium and intermittently temporarily storing the compressed digital reproduction data in a first storage means; Expanding the compressed digital reproduction data read from the first storage means via the memory control means,
Decompression means for outputting the data, compression means for compressing the digital reproduction data which has been decompressed by the decompression means and outputting the data as dubbing data, and temporarily storing the dubbing data in the second storage means. A second memory control means for intermittently reading dubbing data and sequentially dubbing the dubbing data to a second recording medium; and wherein the remaining amount of the compressed digital reproduction data in the first storage means is less than or equal to a predetermined amount, or When detecting that the remaining amount of dubbing data in the storage unit is equal to or more than a predetermined amount, data for stopping transfer of the expanded digital reproduction data from the first memory control unit to the compression unit via the expansion unit. A digital dubbing device comprising a transfer control unit. 4. A first memory control means for intermittently reading digital reproduction data from a first recording medium and intermittently temporarily storing the read digital reproduction data in a first storage means, and said first memory control means. The digital reproduction data of the first storage means, which is continuously transferred via the first storage means, is temporarily stored in the second storage means as dubbing data, and the dubbing data is read out intermittently from the second storage means. (2) a second memory control means for sequentially dubbing to the recording medium; and (b) the remaining amount of digital reproduction data in the first storage means is less than a predetermined amount, or the remaining amount of dubbing data in the second storage means is more than a predetermined amount. When detecting that there is, the data transfer control means for stopping the transfer of the digital reproduction data from the first memory control means to the second memory control means. Example was digital dubbing apparatus.