JPH0291857A - Data recording method - Google Patents

Abstract

PURPOSE:To shorten a recording time without recording a mark when recording is accurately performed by deciding whether or not data is accurately recorded based on the result obtained by reading out the result of recording in the case of recording the data having plural data parts and a mark part corresponding to the data. CONSTITUTION:In the case of recording the data on the recording medium such as an optical card 1 and the like having the plural data parts and the mark parts corresponding to the respective data parts, the card 1 is loaded on a card feeding device 11 and reciprocated in a track direction through by a controller 12 through a card driving circuit 13. The recording data of the controller 12 is modulated in a modulation/demodulation circuit 19 and the light outgoing from a light source 16 is written in the card 1 according to a modulation signal. Then, at the time of reproducing, a reproducing signal obtained by reading the reflected light from the card 1 by a photodetector 17 is demodulated in the circuit 19 and supplied to the controller 12. When the data is not recorded accurately, the information showing that the data is erroneous is recorded on the mark part corresponding to the data part, and the data is recorded again in other data part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording data on a recording medium such as an optical card, an optical disk, or a magnetic card.

[Prior Art] For example, disk-shaped optical disks, optical cards about the size of credit cards, and the like are conventionally known as optical recording media that record and reproduce data using light. FIG. 5 shows a schematic diagram of a conventionally proposed optical card. This optical card 1 includes a data recording area 2 formed by forming a plurality of trunks extending in the longitudinal direction of the card in parallel with the card width direction, and a track number etc. is recorded in this recording area 2 corresponding to each trunk. ID with information recorded in advance
sections 38 to 3n, and data sections 48 to 4n for writing data.
and 1, mark sections 58 to 5n are provided for writing marks indicating whether or not data has been correctly recorded in the data section.

In the conventional data recording method using this type of optical card, when recording data on each track, it may not be possible to record correctly depending on the track due to scratches, defects, dust, etc. on the card. After recording data in the data section as shown in the flowchart, read it out and check whether it was recorded correctly. If it was not recorded correctly, specify another track and record the same data again. When it is certain that the track has been correctly recorded, a mark indicating that the track has been correctly recorded is written in the mark section corresponding to the track. In this way, when it is confirmed that the track has been recorded correctly, a mark indicating that it has been recorded correctly is written in the corresponding mark section of the track, and only the track on which the mark is recorded is read at the time of reading. By preventing tracks on which no marks are recorded from being read, only correctly recorded tracks can be distinguished and read.

[Problem to be solved by the invention]

In the conventional data recording method for the above-mentioned optical card, when data is correctly recorded, a three-step operation is required: data writing→reading→mark writing. However, the error rate in optical cards is generally said to be 10-2 to 10-3, and it is possible to correctly write data to more than 90% of the tracks. For this reason, in conventional recording methods, marks indicating that data has been correctly recorded are written in more than 90% of the tracks on a single optical card, and the total recording of data is There is a problem that it takes a long time.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a data recording method that can shorten the total data recording time.

[Means and operations for solving the problem] In order to achieve the above object, in the present invention, when recording data on a recording medium having a plurality of data sections and a mark section corresponding to each data section, the data is recorded. After recording it in the required data section, it is read out, and based on the reading result, it is determined whether or not the data has been recorded correctly, and if it has been recorded correctly, the recording operation of the data is ended, and if it has not been recorded correctly, it is determined whether the data has been recorded correctly or not. If so, information indicating that the data is incorrect is recorded in the mark portion corresponding to the data portion, and the data is re-recorded in another data portion.

〔Example〕

FIG. 1 shows the configuration of an example of a data recording/reproducing apparatus embodying the present invention. This data recording and reproducing device is
Data is recorded and reproduced on the optical card 1 shown in FIG. It looks like this.

Further, an optical head 14 for recording and reproducing data by projecting a light spot onto the optical card 1 is connected to the optical card by a controller 12 via a head drive circuit 15 in order to seek a desired track on the optical card 1. The card is reciprocated in the card width direction which is orthogonal to the reciprocating direction of the first card. The optical head 14 includes a light source 16 and a photodetector 1.
7 and an optical system 18 that projects the light from the light source 16 onto the optical card 1 and guides the reflected light to the photodetector 17. During recording, the data to be recorded from the controller 12 is transferred to the modulation/demodulation circuit. 19, data is recorded using the light emitted from the light source 16 as a write intensity according to the modulation signal, and during reproduction, the light emitted from the light source 16 is kept at the same playback intensity, and the playback signal is read by a photodetector 17. is demodulated by a modulation/demodulation circuit 19 and supplied to the controller 12. The optical head 14 also has an actuator 20, and the focus/tracking control circuit 21 detects focus/tracking based on the output of the photodetector 17 under the control of the controller 12 during recording/reproduction.
A tracking control signal is supplied to the actuator 20, thereby causing the light from the light source 16 to follow a desired track on the optical card 1 in a predetermined focused state.

The data recording method of the present invention using the data recording/reproducing apparatus shown in FIG. 1 will be explained below.

FIG. 2 is a flowchart showing one embodiment of the present invention. First, the optical head 14 is moved in the width direction of the optical card 1 to seek a desired track, and then, while the optical card 1 is moved in the track direction, desired data is written in the data section of the track.

Next, after reading the written data from the write direction or the opposite direction, it is determined whether the data has been correctly written based on the read result. Here, if the read data matches the written data, it is determined that the data has been written correctly, and the write operation of the data is ended. On the other hand, if the read data does not match the written data, it is determined that recording has not been performed normally, and this indicates that the data written in the marked part of the track is incorrect. A mark is recorded, and then the write operation of the data is similarly performed on other designated tracks. Note that, as shown in FIG. 3, for example, a mark indicating a writing defect is a mark part 27 of the track 26 defined by the guide track 25, which has a certain mark that does not appear in the modulation rules of information in the ID part and the data part. Bit 28a, 2 in the interval
8b, . . . , 280 are written and configured.

In this way, by writing a mark indicating a writing defect only when it is determined that there is a writing defect, the number of tracks that can be written correctly on normal media is far greater than the number of tracks that cannot be written correctly. The time required for recording can be significantly reduced.

In addition, in the above embodiment, the mark indicating a writing defect is
However, in another embodiment of the present invention, the mark includes a specific pattern containing information, such as a track number for rewriting as a replacement for the defective track, as information in the mark. In this way, the track number on which data is re-recorded can be easily known by detecting and reading the mark in the mark portion during reproduction. The reproduction operation in this case will be explained with reference to the flowchart of FIG. First, seek the desired trunk while reading the mark part and ID part, and then depending on the presence or absence of information in the mark part, if there is no recorded information, read the recorded data in the data part of the sought track and transfer it as correct data. However, if there is recorded information, the alternative track indicated by the information is sought and the reproduction operation is performed in the same way.

Note that the present invention can be effectively applied to data recording using not only optical cards but also other recording media such as magnetic cards and optical disks.

〔Effect of the invention〕

As described above, according to the present invention, focusing on the fact that most data is normally recorded correctly, a mark is recorded in the corresponding mark section only when data is not recorded correctly in the data section, and the data is recorded correctly. Since the mark is not recorded when the data is correctly recorded, the total data recording time can be effectively shortened.

[Brief explanation of drawings]

Part 1 is a diagram showing the configuration of an example of a data recording/reproducing device implementing the present invention, Figure 2 is a flowchart showing an embodiment of the invention, Figure 3 is a diagram showing an example pattern of marks, and Part 4 is The figure is a flowchart of a reproduction operation in another embodiment of the present invention, and FIGS. 5 and 6 are diagrams for explaining the conventional technology. 1... Optical card 2... Data recording area 3
a-3n...ID section 48-4n...data section 58-5n...mark section 25...guide track 26...track 27...mark section 28a-28n...focus

Claims (1)

[Claims] 1. When recording data on a recording medium having a plurality of data sections and mark sections corresponding to each data section, the data is recorded in a required data section and then read out; Based on the read result, it is determined whether or not the data has been recorded correctly, and if the data has been recorded correctly, the recording operation of the data is finished, and if it has not been recorded correctly, the data is recorded in the mark section corresponding to the data section. A data recording method characterized by recording information indicating that the data is incorrect and rerecording the data in another data section.