JPS63191370A - Data recording method to card-like recording medium - Google Patents

Abstract

PURPOSE:To record a data so as to be readable from both directions, and to improve the recording efficiency by providing a recording start flag writing circuit, a recording end flag writing circuit, a recording start flag detecting circuit and a recording and flag detecting circuit. CONSTITUTION:In case of recording a data to an optical card, first of all, a recording start flag writing circuit 25 is driven, and a recording start flag is recorded to the optical card by an optical unit 14 through a laser driving circuit 13. Subsequently, a recording data is outputted from a sector buffer memory 11, the data is recorded to the optical card through a modulating circuit 12 and the circuit 13, and thereafter, based on an output of a recording end flag writing circuit 26, a recording end flag is recorded to the optical card through the circuit 13. Also, in case of reproduction, the corresponding flag is detected in a recording start flag detecting circuit 27 and a recording end flag detecting circuit 28 by a binarized reproducing signal from a signal processor 16, and in accordance with a detecting state, the memory 11 is controlled by a control circuit 18. In such a way, a data can be recorded so as to be readable from both directions, and the recording efficiency can be improved.

Description

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

[Conventional technology]

For example, in a data recording and/or reproducing system using an optical card as a recording medium, an optical card having a plurality of tracks parallel to each other and an optical system for optically recording and/or reproducing data on the optical card are used. Data recording and/or
Or trying to play.

- Optical cards used in such systems are disclosed, for example, in Japanese Patent Publication No. 58-500462, and the applicant has also proposed various optical cards.

FIG. 5 shows the configuration of the optical card proposed by the applicant. This optical card 1 includes a data recording area 2 formed by forming a plurality of tracks extending in the longitudinal direction of the card in parallel with the card width direction, and in this recording area 2, tracks are provided at both ends corresponding to each track. The ID section 34 records address information, etc., and a recording track section 5 for writing data between these ten sections 3 and 4 is provided.

FIG. 6 shows an enlarged view of the tracks of the optical card 1 shown in FIG. The recording track 6 is defined by a guide track 7 for tracking, and the 10th section 3 is used for recording the data section 8 on the recording track 6 and for reproducing it from the left side in the figure. is used when reproducing the data portion 8 from the right side.

As shown in FIGS. 7A and 7B, the 10 parts 3 and 4 are pull-in parts (SY
NC) 3a, 4a, synchronization pattern (DM) 3b, 4b indicating the beginning of data, and track number section (TRACK NO) 3c in which the track number is stored.
, 4c. Furthermore, as shown in FIG. 7C, the data section 8 includes data section synchronization patterns 8b indicating the beginning of the data on both sides of data 8a which is necessary information.
, 8c, and data section pull-in sections 8d and 8e for synchronization pull-in of self-regenerating clock generation. The data section pull-in section 8e and the data section synchronization pattern 8C are used when reproducing from.

FIG. 8 shows the configuration of a recording/reproducing apparatus using the optical card 11 described above. In such a configuration, the data section is recorded by modulating the recording data from the sector buffer memory 11 in the modulation circuit 12, and controlling the laser drive circuit 13 with the modulation signal so that the output light of the semiconductor laser in the optical unit 14 is Data is recorded on the optical card by changing the current value so that it exceeds the sensitivity of the recording material of the card. Here, the recording of the data portion is performed only in one direction of the relative reciprocating movement of the optical unit 14 and the optical card in the track direction, for example, from the left to the right in FIG. In addition, in reproducing data recorded in the data section, the output signal from the optical unit 14 is amplified by the preamplifier 15 and then converted to a binary reproduction signal by the signal processing circuit 16, which is then converted to a binary reproduction signal by the demodulation circuit 17.
After demodulating the demodulated signal, the demodulated signal is sent to the sector buffer memory 11.
I am trying to store it in . When reproducing this data, if the optical card is relatively moving in the same direction as when recording the data, the demodulated data is read from the beginning of the sector buffer memo January 1 according to the movement direction signal from the control circuit 18. When the demodulated data is stored and moved in the opposite direction, the demodulated data is stored from the end of the sector buffer memory 11.

[Problem that the invention seeks to solve]

However, in the data recording method described above,
Since the data recording direction is fixed to one predetermined direction,
For example, when data is to be continuously recorded on a plurality of tracks, it is necessary to temporarily return the optical card or optical unit to a predetermined recording start position after recording data for one track. Also, when recording data for one track, if the optical card or optical unit is on the opposite side from the recording start position, recording will be performed after returning to the start position in the same way. Therefore, there is a problem in that it takes time to record data and is inefficient.

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 on a card-shaped recording medium that can efficiently record data so that it can be read from both directions.

[Means and operations for solving the problem] In order to achieve the above object, the present invention records data together with information indicating the recording direction in both directions of relative reciprocating movement between the card-shaped recording medium and the recording head. .

〔Example〕

FIGS. 1A and 1B show a first embodiment of the invention. In this embodiment, data is recorded in the optical card shown in FIG. A recording end flag 22 representing the recording end flag 22 is recorded. The recording start and end flags 21 and 22 do not apply to the modulation rules of the data section 8,
And both are configured with different patterns.

That is, in this embodiment, when recording the data section 8, the recording start flag 21 is first recorded in both directions of relative reciprocating movement between the optical card and the recording head, and then the data section 8 is recorded, and then the recording end flag is set. Record 22. Therefore, FIG. 1A shows the data section 8 from left to right, and
Figure B shows the case where recording is performed from the right side to the left side.

When reproducing data recorded in this way, demodulated data is stored from the beginning of the sector buffer memory depending on which of the recording start flag 21 and recording end flag 22 is detected first prior to the detection of the data section 8. or store from the end. That is, when the recording start flag 21 is detected first, the demodulated data is stored from the beginning of the sector buffer memory, and conversely, when the recording end flag 22 is detected first, the recording direction is opposite to the reading direction. Therefore, the demodulated data is stored from the end of the sector buffer memory.

FIG. 2 is a block diagram showing the configuration of an example of a data recording/reproducing device in an optical card embodying the present invention.

This recording/reproducing apparatus has a recording start flag writing circuit 25, a recording end flag writing circuit 26, a recording start flag detecting circuit 27, and a recording end flag detecting circuit 28 added to the recording/reproducing apparatus shown in FIG. In such a configuration, when recording a data section, first the control circuit 1 is
8 drives the recording start flag writing circuit 25, and based on its output, the recording start flag is recorded on the recording track of the optical card in the optical unit 14 via the laser drive circuit 13, and then the recording start flag is written from the sector buffer memory 11. After outputting the data and similarly recording it via the modulation circuit 12 and the laser drive circuit 13, the recording end flag writing circuit 26 is driven and the recording end flag is written via the laser drive circuit 13 based on the output. Record.

In addition, during reproduction, the recording start flag detection circuit 27 and the recording end flag detection circuit 28 detect corresponding flags from the binary reproduction signal from the signal processing circuit 16, so that the recording start flag is detected first. The control circuit 18 controls the sector buffer memory 11 so that the demodulated data is stored from the beginning in the sector buffer memory 11, and when the recording end flag is detected first, the demodulated data is stored from the end.

In this way, by recording data in both directions of the relative reciprocating movement between the optical card and the optical unit 14, data can be efficiently recorded and there is no signal indicating the direction of relative movement. Data can be reliably reproduced in both directions.

FIGS. 3A and 3B show a second embodiment of the invention. In this embodiment, the recording end flag 22 is omitted from the first embodiment, and the data portion 8 is recorded from the left side to the right side in FIG. 3A, and from the right side to the left side in FIG. 3B. In this way, even if only the recording start flag 21 is recorded, it depends on the presence or absence of the recording start flag 21, that is, whether the recording start flag 21 is detected first or the data section 8 is detected. Since the recording direction can be recognized, the same effects as in the first embodiment can be obtained. Note that the recording start flag 21 may be omitted and only the recording end flag may be recorded, and the same effect can be obtained in this case as well.

FIGS. 4A and 4B show a third embodiment of the invention. This embodiment has a function of indicating the recording direction of the start and end of recording in the synchronization patterns 8b and 8c constituting the data section 8, without recording a flag indicating a special recording direction as in the first and second embodiments. FIG. 4A shows a case where the recording direction is from left to right, and FIG. 4B shows a case where the recording direction is from right to left. A recording/reproducing device having such a format configuration can be easily configured by preparing two types of synchronization pattern recording circuits and two types of detection circuits, and thereby obtain the same effect as the above embodiment. can.

Note that either one of the synchronization patterns 8b and 8c may also have the function of indicating the recording direction.

Although the above description has been made using an optical card as an example, the present invention can be effectively applied not only to optical cards but also to cases where a card-shaped recording medium such as a magnetic card is used.

〔Effect of the invention〕

As described above, according to the present invention, data is recorded in both directions along with information indicating the recording direction so that data can be read from both directions of relative reciprocating movement between the card-shaped recording medium and the recording head. , data can be recorded efficiently and in a short time.

[Brief explanation of the drawing]

~ Figures 1A and B are diagrams showing a first embodiment of the present invention, Figure 2 is a block diagram showing the configuration of an example of a data recording/reproducing device in an optical card implementing this invention, Figures 3A and B is a diagram showing a second embodiment of the present invention, FIGS. 4A and B are diagrams also showing a third embodiment, and FIG.
The figure shows the configuration of an optical card applicable to the present invention, and FIGS. 6, 7A-7C, and 8 are diagrams for explaining conventional examples. 1... Optical card 2... Data recording area 3
．． 4... 10 copies 5... Recording track section 6
... Recording track 7... Guide track 8.
...Data section 8b+8c...Synchronization pattern 21...Recording start flag 22...Recording end flag Fig. 5 Fig. 2 Fig. 8 Fig. 3 Fig. 7

Claims (1)

[Claims] 1. A method for recording data on a card-shaped recording medium, which comprises recording data together with information indicating the recording direction in both directions while relatively reciprocating the card-shaped recording medium and the recording head.