JP2002117618A - Data recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a data recorder, which is capable of checking whether the once recorded information signal (data) is correctly recorded, by dubbing and surely and correctly recording the information signal by correcting errors, when there is one. SOLUTION: This data recorder 1 has a CD reproducing device 2, which reads the data of, for example, a CD, for example, an HD device 3 which is capable of writing and reading this data, a speed controller 5 which controls the CD reading speed of the CD reproducing device 2 and the writing and reading speeds of the HD device 3, an error-discriminating means which writes the data read by the CD reproducing device 2 to an HD, then reads out the written data by the HD device 3 by each of the prescribed units and discriminates the presence or absence of the occurrence of the error by comparing the read-out data with the data of the CD and a rewriting means 4 which rewrites the data of the error parts with the data read out of the CD of the CD reproducing device 2 when the error is discriminated by the error discriminating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for once writing an information signal (data) such as music on a recording source medium to a recording destination medium and then confirming whether the written data is correctly recorded. The present invention relates to a data recording device that corrects and reliably records data when there is an error.

[0002]

2. Description of the Related Art For example, a so-called car audio device is
In addition to a radio receiving device and a tape reproducing device, any reproducing / recording means of a CD (compact disc) reproducing device, an MD (mini disc) recording / reproducing device, or a DVD (digital video disc) recording / reproducing device is combined. It is mounted on a vehicle, and recently, a CD player and an MD
A combination of a recording / reproducing device or a DVD recording / reproducing device is considered, and an HD (hard disk) device is considered to be incorporated in the near future.

In particular, in the case of an on-vehicle electronic device in which a reproducing unit and a recording unit are combined, the C unit is used in the vehicle by using the reproducing unit.
An information signal read (reproduced) from a recording medium (hereinafter, abbreviated as “recording medium”) such as D, MD, or DVD is recorded on a recording medium (CD, MD, DVD, HD, or the like) using a recording unit. Hereinafter, it is possible to perform dubbing (writing) on a “recording destination medium”.

It is also conceivable to control the reproducing speed of the reproducing means and the recording speed of the recording means at double speed, to read from the recording medium at double speed, and to record (dub) the recording medium. Recording or dubbing an information signal from another recording source medium on a recording destination medium while listening to the information signal from the recording medium may be considered.

[0005]

However, in the case of recording (dubbing) in a vehicle, it is conceivable that many errors occur at the time of reading due to vibration or power fluctuation.

In the case of the above-mentioned double speed recording (dubbing), it is expected that many errors will occur during reading. This is particularly true when double speed recording is performed in a vehicle.

Further, in the case of double-speed recording or the above-mentioned reverse recording, recording is not performed while listening to the reproduced information signal. It cannot be confirmed whether or not it has been done.

[0008] The recording source medium is a so-called rental CD or the like. When dubbing these media, the media may be returned immediately after dubbing in the vehicle, so that dubbing is required more reliably.

[0009] Therefore, the present invention is to solve such a problem, and it is confirmed whether or not the information signal (data) is recorded once by recording (dubbing) and is correctly recorded, and there is an error. If so, correct it,
An object of the present invention is to provide a data recording method capable of reliably and correctly recording an information signal.

[0010]

Therefore, a data recording apparatus according to the first aspect of the present invention comprises: a reading unit capable of reading data recorded on a recording medium at a variable speed; A writing / reading unit that can write data to a recording destination medium and read data from the recording destination medium, and at least one of a writing speed and a reading speed is variable; and a reading speed of the reading unit, A speed control unit for controlling at least one of a writing speed and a reading speed of the writing / reading unit; and data of the recording source medium read by the reading unit to the recording destination medium by the writing / reading unit. After writing, the written data on the recording destination medium is read by the writing / reading means, and Error determining means for comparing the data with the data of the recording source medium for each predetermined data unit to determine the presence or absence of an error; and when the error determining means determines the error, the error exists. Rewriting control means for reading the data in the data unit from the recording medium by the reading means and rewriting the data by writing the data to the recording medium by the reading and writing means.

According to a second aspect of the present invention, in the data recording apparatus of the first aspect, the writing / reading means in the data recording apparatus of the first aspect reads the data written on the recording destination medium, and reads the read data. After the error discriminating unit makes an error discrimination, at least one of the reading speed of the reading unit, the writing speed and the reading speed of the writing and reading unit is changed by the speed control unit according to the result of the error discrimination. It is characterized in that the speed is made different from the speed before the error is determined by the control.

According to a third aspect of the present invention, in the data recording apparatus according to the first aspect, the data of the recording source medium read by the reading means in the data recording apparatus of the first aspect is written by the writing / reading means to the recording destination medium. When writing the data, if there is an error in the read data, information of the error is recorded together with the data on the recording destination medium.

According to a fourth aspect of the present invention, there is provided a data recording apparatus for reading data from the recording source medium and / or transmitting data to the recording destination medium in the data recording apparatus according to any one of the first to third aspects. The unit of writing and reading is performed in a data unit specified for each recording medium.

Further, a data recording device according to a fifth aspect of the present invention reads the data written to the recording destination medium by the writing / reading means in the data recording device according to the first aspect, and reads the read data into the data recording device. After the error discrimination by the error discriminating means, at least one of the reading speed of the reading means, the writing speed and the reading speed of the writing / reading means is changed according to the result of the error discrimination. It is characterized in that the speed is made lower than the speed before the error determination by the control.

Further, a data recording apparatus according to a sixth aspect of the present invention reads the data written on the recording destination medium by the writing / reading means in the data recording apparatus according to the first aspect, and reads the read data. The reading speed of the reading unit from the recording source medium after the error determination by the error determination unit is made slower than the speed before the error determination by the control of the speed control unit according to the result of the error determination. It is characterized by the following.

Further, the data recording apparatus according to the present invention can read data recorded on a recording source medium and write data on the recording source medium into a recording destination medium. Writing and reading means capable of reading data from the recording destination medium, and writing the data of the recording source medium read by the reading means to the recording destination medium by the writing and reading means, and Error determining means for reading the data of the recording destination medium by the writing / reading means, and comparing the read data with the data of the recording source medium for each predetermined data unit to determine whether there is an error; When an error is determined by the error determination unit, the data in the data unit where the error exists is recorded by the reading unit. Read from the original media, and a rewrite control means for rewriting by writing the data in the write reading unit to the recording destination medium.

Therefore, according to the first aspect of the present invention,
The writing speed and the reading speed can be selected in consideration of the speed at which an error is less likely to occur, the speed at which the error can be reliably corrected, and the efficiency of recording (dubbing).

According to the second aspect of the present invention,
Writing can be performed more reliably and accurately, and the writing time can be reduced.

According to the third aspect of the present invention, in addition to the operation of the first aspect, it is possible to jump to a write unit where an error signal exists and perform error correction of the unit. Can be. Further, in the case of a vehicle, even when the recording on the recording destination medium is interrupted due to the turning off of the engine or fluctuation of the power supply, the recording can be accurately resumed from the interrupted position.

According to the fourth aspect of the present invention, in addition to the effect of the first aspect of the present invention, the memory area of the error discriminating means can be small and the data unit can be small. The error can be finely determined.

According to the fifth aspect of the present invention, in addition to the operation of the first aspect, the data read by the read / write means can be written more reliably and accurately. it can.

Further, according to the invention described in claim 6, in addition to the effect of the invention described in claim 1, it is possible to suppress the occurrence of an error in the data read by the reading means, and to more reliably And it can write correctly.

According to the present invention, data from a recording source medium can be reliably and correctly written to a recording destination medium.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data recording apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a data recording apparatus according to the present invention, and FIG. 2 is an operation flowchart of the data recording apparatus shown in FIG.

First, the configuration of the data recording apparatus of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral 1 indicates a data recording device as a whole. The data recording device 1 includes a reading device 2, a writing / reading device 3, a main control device 4, a speed control device 5,
A DSP (Digital Signal Processor) 6, a buffer memory 7, a key input device 8, and a display device 9 are provided.

The reading device 2 includes, for example, a CD, an MD, and a DV.
A device such as a CD playback device, an MD playback device, and a DVD playback device that can read the information signal of a recording source medium on which an information signal such as music recorded on D or the like is written.

The writing / reading device 3 includes, for example, HD, MD,
An HD device capable of writing (recording) the information signal on a recording medium such as a CD-R or a DVD-RW and reading the written information signal;
It is a device such as a recording and reproducing device, a CD recording and reproducing device, and a DVD recording and reproducing device.

The main control unit 4 includes a CPU, ROM, RA
M and HD, and is configured mainly by a computer. The CPU calculates and judges data based on an execution program or an application program written in the memory by operating the key input device 8. This is a device that controls the entire recording device 1.

Therefore, the main control device 4 generally incorporates the following program. That is, when dubbing data on a recording source medium such as a rental CD, the data once written to a recording destination medium such as an HD or MD is read, and this is compared with data read from the recording source medium again. This is a program that performs an operation for confirming the presence or absence of an error, performs dubbing correctly and ends the operation.

Data comparison is performed for each data reading unit. Depending on the type of the recording medium in the data recording device 1, it may be a sector or a cluster. The unit for reading out the error may be written in the recording destination medium or may be stored in the memory.

If there is an error in the read data,
Alternatively, if there is an error even after error correction, the information of "error" is also written to the recording destination medium. The data may be written in track units, or may be written not in track units but in read units.
An error value or parity may be written. Since various methods are conceivable for this method, a program suitable for the target data is set. Further, when reading data in the error correction mode, it is desirable to reduce the reading speed more than in the recording (dubbing) mode so that an error can be reliably detected in the error correction mode. Therefore, it may be programmed so that only information that can determine “error present” may be written.

In addition, necessary or necessary software such as a writing / reading speed is stored in a memory or a hard disk of the main controller 4 as needed.
It is good to store it.

The speed controller 5 is controlled by the main controller 4 to generate a reading signal from the reading device 2 according to an input from the key input device 8.
And the writing speed of the writing / reading device 3.

The DSP 6 has an encoder function for compressing data read from the recording medium by the reading device 2 into a standard that can be written by the writing / reading device 3, for example, a standard such as MP3.

The buffer memory 7 is a memory for temporarily storing data of a predetermined unit read from the writing / reading device 3.

The key input device 8 sets the speed of the reading device 2 and the writing / reading device 3 and records the information signal (data) from the recording source medium read from the reading device 2 by the writing / reading device 3. The operation of recording on the destination medium (write mode), the reading and reading device 3 reads the data of the predetermined unit written on the recording destination medium, and the reading device 2 reproduces the data of the predetermined unit from the recording source medium. This is an apparatus including input keys for performing an operation (error correction mode) of comparing and judging the presence or absence of an error and writing correct data to the recording medium by the writing / reading device 3 again.

The display device 9 operates under the control of the main controller 4 such as a write mode, an error correction mode, a speed mode of the reading device 2 and the writing / reading device 3 at that time, an operation such as occurrence of an error, and the like. This is a device for displaying.

Next, the operation of the data recording apparatus 1 will be described with reference to the operation flowchart shown in FIG. In addition,
A CD is used as a recording source medium.
As the recording / reproducing device 3, a combination using an HD device (drive) as the recording / reproducing device can be cited.

In FIG. 2, steps (S1) to (S7) are normal recording operations.

First, in step (S1), the recording mode of the key input device 8 is operated to start recording data of the recording source medium on the recording destination medium (recording mode).

In step (S2), the beginning of the music is found.

In step (S3), the reader 2 reads desired music data, for example, one piece of music from the head from the CD. By operating the key input device 8, the reading device 2 and the writing / reading device 3 are controlled via the main control device 4 and the speed control device 5, so that the reading speed is performed at a double speed, for example, 8 times speed. It is desirable that the entire recording operation time can be saved.

In step (S4), after the read data is converted into the HD recording standard by the DSP 6, the data is transferred to the recording destination medium (HD) by the writing / reading device 3 through the buffer memory 7.
Write to. As described above, the reading unit is, specifically, a data unit defined for each recording medium, for example, a sector or a cluster. The unit from which this error is read may be written to a recording destination medium or may be stored in a memory.

Step (S5) and Step (S6)
Then, if there is an error in the read data, or if there is an error after error correction, the information of "error present" is also written to the recording destination medium. For example,
There is an error on the first track,
For example, write in another area. Writing may be performed for each read unit instead of for each track. An error value or parity may be written. Various methods can be considered for this method.

In this case, as will be described later, when reading in the error correction mode, it is desirable to reduce the reading speed more than in the recording mode, so that an error can be reliably detected in the error correction mode. Therefore, only the information which can determine “there is an error” may be used.

In step (S7), the writing of the data of one music is completed.

Next, it is checked whether or not the data (one piece of music data) from the recording source medium written in the recording destination medium in this manner has been reliably and correctly recorded on the recording destination medium. Steps (S8) to FIG.
Step (S14) shows the flow of the operation.

First, in a step (S8), it is confirmed whether or not all data of one music has no error. If there is no error, the process is terminated.

If there is an error in step (S8), reading and writing are started again from the beginning of the music in step (S9). However, instead of starting from the beginning of the music, error correction may be started immediately by jumping to the beginning of the first writing unit having an error in the read data unit.

In step (S10), the key input device 8 is operated, and in the error correction mode, reading is performed at a speed lower than the reading speed of the reading device 2 in the recording mode, for example, double speed. Of course, it is possible to perform the recording at the same speed as in the recording mode, but it is desirable to perform the recording at a lower speed. This is because the slower the speed, the more reliable the data reading, the more accurate the correct data can be written to the recording destination medium, which is more effective. Alternatively, it is conceivable that the writing or reading speed in the writing / reading device 3 may be made lower than the respective speeds before the error is determined. A plurality of such combinations of reading and writing speeds are set, and these combinations are set. It is preferable to write the information in a memory in main controller 4 in advance. Needless to say, the speed in the recording mode and the best speed in the error correction mode are programmed and written in the memory, and when the recording mode is selected by the key input device 8, the error correction is finished. May be configured to be automatically performed and terminated.

In step (S11), the data written to the recording medium is read, the data is written to the buffer memory 7, and the data is read from the recording medium.
It is determined whether there is an error in the data.

In step (S12), if there is an error in the data written to the recording destination medium, the data is read again from the recording source medium, compared with the data, and error-corrected. Write to the data part. This operation is repeated until all the songs are completed.

When all the error corrections of the music have been completed in step (S13), the operation of the data recording device 1 is completed (S14).

If the error correction result shows the error rate, write it in the recording mode,
It is also possible to adopt a method of comparing with the data after the error correction and writing the data with the lower error rate.

Although the reading unit is as described above, it differs depending on the recording medium, that is, the recording source medium and the recording destination medium. For example, in the case of MS (Memory Stick), it may be a block unit having digital data. This is much finer than a track (song) on a CD. If a method of performing error correction on a track-by-track basis is adopted, correction cannot be performed unless all tracks can be read at the next time. Therefore, a memory having such a large capacity is required. If recording is performed in a unit as small as possible, if there is an error in that unit, only the portion is read out again, thereby increasing the efficiency. In particular, when recording is performed in a running vehicle, the error correction may be good at one time, but may worsen at the next time.
It is possible that what was right before is wrong right after. Therefore, it is desirable to truncate the data in which the error has occurred as small as possible. That is, it is desirable to rewrite finely. In recent years, the capacity of a recording destination medium has been increasing. If the capacity is sufficiently large, it is advantageous to adopt such a fine rewriting method.

The number of times of the error correction mode (rewriting) is not limited to two times, and it may be configured so that the user can specify it. The data recording device 1 may be configured to automatically perform repetition.

In the above description, the reading speed is a combination of the 8 × speed and the 2 × speed. However, if the recording (dubbing) is to be performed more reliably, the reading speed may be reduced to the 1 × speed. If the data recorded on the recording medium has too many errors, or if the recording medium is a CD, for example, the reading method differs depending on the disc depending on the recording depth, the speed in the error correction mode may be different. It is better to have the same speed.

Further, in the above-described embodiment, the combination of recording the data of the CD as the recording medium on the HD as the recording medium in the vehicle having a lot of vibrations has been described. For recording on a recording destination medium, both the recording source medium and the recording destination medium may be MS.
In S, the recording medium may be a combination of HD.

Also, the example has been described in which the speed of the reading device 2 is reduced or the speed of the writing / reading device 3 is reduced when an error occurs.
It is conceivable to shorten the processing time by increasing the subsequent speed from the speed before the error is determined.

[0062]

As described above, according to the data recording apparatus of the present invention, at the time of recording (dubbing), double-speed recording (dubbing) and the sound of data such as back-recording are confirmed. However, when writing cannot be performed, or when writing to a recording destination medium is performed in a state where a reading operation such as writing in an in-vehicle device is unstable, writing can be performed more reliably. In some cases, it is not necessary to read and confirm the written data, which can reduce user frustration.

When the data recording apparatus of the present invention is mounted in a vehicle, for example, a user rents a recording medium such as a CD or MD at a rental shop, and dubbing in the vehicle while going out. Record), and after the end,
Soon they can be returned to the rental shop. Therefore, the trouble of having to go to the rental shop for return as in the past is eliminated. And, for example, if it has a capability of dubbing at a high speed such as 8 times speed, dubbing can be completed in a short time, and the battery does not run out while the user is leaving the vehicle. Numerous excellent effects can be obtained, such as being able to make secret recordings.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a data recording device of the present invention.

FIG. 2 is an operation flowchart of the data recording apparatus shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data recording device of one Embodiment of this invention, 2 ... Reading device, 3 ... Write / read device, 4 ... Main control device, 5 ... Speed control device, 6 ... DSP, 7 ... Buffer memory, 8 ... Key input Device, 9 ... Display device

Claims (7)

[Claims] 1. A reading means which can read data recorded on a recording medium at a variable speed, and which can write data on the recording medium to a recording medium and read data from the recording medium. And a writing / reading unit in which at least one of a writing speed and a reading speed is variable; and controlling at least one of a reading speed of the reading unit, a writing speed and a reading speed of the writing / reading unit. Speed control means, and after writing the data of the recording source medium read by the reading means to the recording destination medium by the writing and reading means, write and read the written data of the recording destination medium. Means for reading the read data and the data on the recording source medium for each predetermined data unit. Error determining means for comparing the presence or absence of an error, and when the error determining means determines an error, the reading means reads the data of the data unit having the error from the recording source medium, A data recording device comprising: rewriting control means for rewriting data by writing the data on a recording destination medium with the reading and writing means. 2. The reading speed of the reading unit after reading the data written on the recording destination medium by the writing / reading unit, and determining the error of the read data by the error determining unit. 2. The data according to claim 1, wherein at least one of the writing speed and the reading speed is made different from the speed before the error is determined by the control of the speed control means in accordance with the result of the error determination. Recording device. 3. When writing the data of the recording medium read by the reading means to the recording medium by the writing / reading means, if there is an error in the read data, the error is added together with the data. 2. The data recording apparatus according to claim 1, wherein the presence information is recorded on the recording destination medium. 4. A unit for reading data from the recording medium and / or writing / reading data to / from the recording medium is performed in a data unit defined for each recording medium. The data recording device according to claim 3. 5. The reading speed of the reading unit after reading the data written on the recording medium by the writing / reading unit and determining the read data as an error by the error determining unit. 2. The apparatus according to claim 1, wherein at least one of the writing speed and the reading speed of the means is made slower than the speed before the error is determined by the control of the speed control means in accordance with the result of the error determination. The data recording device according to the above. 6. A reading speed of the reading means from the recording source medium after reading the data written on the recording destination medium by the writing / reading means and determining an error in the read data by the error determining means. 2. The data recording apparatus according to claim 1, wherein, according to a result of the error determination, the speed is controlled to be lower than a speed before the error determination under the control of the speed control unit. 7. A reading means capable of reading data recorded on a recording medium, and a writing means capable of writing data on the recording medium to a recording medium and reading data from the recording medium. Writing means for reading the data of the recording medium read by the reading means on the recording medium by the writing and reading means, and then writing the written data of the recording medium to the writing and reading means. Error determining means for comparing the read data with the data of the recording source medium for each predetermined data unit to determine the presence or absence of an error; and when the error determining means determines an error, The reading unit reads out the data of the data unit in which the error exists from the recording source medium, and reads the data to the recording destination medium. A data recording device, comprising: rewriting control means for rewriting by writing the data with writing / reading means.