JPS61246928A - Recording method for light digital data - Google Patents

Abstract

PURPOSE:To make it possible to confirm which data recording area is the data recording area in reading by recording address data for discriminating each data recording area in prescribed position of each data recording area. CONSTITUTION:Actual data is recorded in this case in an area Q adjacent to the right of a bar P. The are Q is classified into five areas A, B, C, B', A'. In this case, characteristic address data is recorded in areas A, A'. An auxiliary mark used to correct inclination of a head 4 is recorded in area B, B', and data to be recorded is recorded in the area C. Data groups in areas A and A' are completely the same data and constituted of 7 bits. Data in this area is address data that indicates addresses of each data recording area and data is different for each data recording area. Accordingly, it is possible to recognize which data recording area is the data recording area being read at present by reading the address data by the head 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for recording optical digital data, and particularly to a method for recording optical digital data on an optical data recording card having a plurality of data recording areas.

[Technical background of the invention and its problems]

Currently, magnetic cards such as cash cards and credit cards are widely used, but in recent years, optical data recording cards that record information optically have been proposed in order to improve recording density and ensure recording reliability. . FIG. 2 shows an example of a conventionally proposed optical data recording card. Record card 1
A data recording section 2 is provided above, and a plurality of data recording areas 3 are formed in a stripe shape in this data recording section 2. FIG. 2(a) shows an example in which the data recording area 3 is formed vertically, and FIG. 2(b) shows an example in which it is formed horizontally. Data is optically recorded and read in each data recording area.

However, in this conventional data recording method, since the data to be recorded is simply written in each data recording area, it is difficult to determine which data recording area the data being read was recorded in. I can't know if there is. Therefore, when randomly accessing a specific data recording area, the reading head must be mechanically moved to that position using the absolute position of the data recording area on the recording card 1 as a clue. As the recording density increases, this position control requires considerable precision, and there is no means to confirm whether the data recording area being read is actually the desired one. As described above, the conventional data recording method has the drawback that it is not possible to confirm which data recording area is the data recording area that is being read.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical digital data recording method that can confirm which data recording area is currently being read for a data recording card having a plurality of data recording areas. shall be.

[Summary of the Invention] A feature of the present invention is that, in a method for recording optical digital data on an optical data recording card having a plurality of data recording areas, a recording medium is provided at a predetermined position of each data recording area to distinguish each data recording area. record address data,
The point is that it is possible to confirm which data recording area the data recording area that is being read is located in.

[Embodiments of the invention]

The present invention will be explained below based on the embodiment shown in FIG.

Figure 1 shows the data recording area 3 of the card shown in Figure 2 (a).
FIG. 2 is an explanatory diagram showing a state in which data is recorded using the method according to the present invention. Each area surrounded by a broken line in this figure represents one data recording area. Further, the dashed line in the figure indicates the position of the optical reading head 4. For this reading head 4, for example, a COD licensor or the like is used. The left and right positioning of the reading head 4 is performed by reading the positions of two bars P provided on the left side of each area. That is, position control is performed so that the two bars P are always at the left end of the reading head 4. These two bars P are 1
Within one area, it is configured as a continuous line from top to bottom (the central part is partially omitted in the figure), and the reading head 4 scans one area from top to bottom along this bar P. It turns out. The position of the reading head 4 shown in FIG. 1 is the position when reading the area 3-1, but a part of the right side portion of the reading head 4 overlaps the adjacent area 3-2.

Actual data is recorded in area Q adjacent to the right of bar P. In the case of this embodiment, the area Q further includes A, B, C,
It is classified into five areas: B' and A'. Address data, which is a feature of the present invention, is recorded in areas A and A'.

Auxiliary marks used to correct the inclination of the reading head 4 are recorded in areas B and B', and data to be recorded is recorded in area C (partially omitted in the figure).

The data in areas A and A' are exactly the same data, and in this embodiment are composed of 7 bits 1 to 1. This area consists of the beginning (area A) and the trailing area (area A') of each data recording area.
It is set in. The data in this area is address data indicating the address of each data recording area, and is different data for each data recording area. Therefore, by reading this address data with the reading head 4, it is possible to recognize which data recording area is the data recording area currently being read.

In this embodiment, the address data is expressed as 7-bit data based on the presence or absence of bars, but other methods such as expression using the interval between adjacent bars may be used. Furthermore, the address data is not limited to the beginning and end of each data recording area, but may be placed anywhere as long as it can be identified as address data.

〔Effect of the invention〕

As described above, according to the present invention, when recording optical digital data on an optical data recording card having a plurality of data recording areas, address data for distinguishing each data recording area is provided at a predetermined position of each data recording area. Since the data is recorded, it becomes possible to confirm which data recording area is the data recording area that is being read.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram that does not show the state in which data is recorded based on the recording method according to the present invention, and FIG. 2 is a diagram illustrating an example of a general optical data recording card. 1... Recording card, 2... Data recording section, 3...
Data recording area, 4...reading head, P...positioning bar, Q...data area, A, A'...address data area, B, B'...area for tilt correction, C
...Data area that should originally be recorded. Applicant's agent Kiyoshi Inomata Figure 1

Claims (1)

[Claims] 1. In a method for recording optical digital data on an optical data recording card having a plurality of data recording areas, address data for distinguishing each data recording area is provided at a predetermined position of each data recording area. An optical digital data recording method characterized by recording. 2. The method for recording optical digital data as set forth in claim 1, wherein the predetermined positions are a leading portion and a trailing portion of each data recording area.