JPS62149072A - Information record carrier - Google Patents

Abstract

PURPOSE:To surely identify information tracks by specifying the length and position etc., of information in an area that separates and distinguishes information tracks. CONSTITUTION:Tracks of each band 203 are constituted of separation areas 202, information tracks 201 of a group of unit data areas 204, identifying areas 205 etc., and the areas 202 are read by a sensor array 10 and corresponding tracks 201 are identified. Information of the areas 202 is made to 1/2 of the length in vertical direction of the direction of arrangement of information bits of tracks 201, and positioned in one side of information bits of the tracks 201. Accordingly, only information of areas 202 of corresponding tracks 201 is read out even in the case where the sensor 10 is slanted in some degree, and the information of adjoining track is not read out. Consequently, the information tracks can be identified surely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording carrier, and particularly to the format of an information recording carrier in which a plurality of information tracks are arranged.

[Background of the invention]

In recent years, many optical information recording and reproducing devices using information recording carriers such as optical files and compact discs have been proposed. Proposals have also begun to be made for a card-shaped optical information recording carrier (hereinafter referred to as an optical card) and a method for using the same.

FIG. 8 is a schematic plan view showing the recording format of the optical card.

In the figure, a recording area 2 is provided on an optical card 1 which is an information recording carrier, and a plurality of grooves 3 are arranged in the recording area 2 to form a shape 1t''.Furthermore, a band 3 is an information track. 4, and start bits and stop bits, which will be described later, are arranged in multiple formats, and the information track 4 consists of several dozen to
It has an answer of about 100 bits.゛In addition, each band is separated by a reference line (hereinafter referred to as I (line)).
This is the direction in which the optical card 1 is cut into four parts when S is produced.

Figure 10 is necessary in the f14 formation section of the former card Niu device u.

FIG. 11 is an explanatory diagram showing the rJJt reading #) operation of the reading head section.

In both figures, the optical card 1 can be moved in the direction of the arrow by a stringer 446, and the news recorded on the original card 1 is picked up and reproduced by the optical head 11 every 1'H news track. It will be done. Then, the light from the LED tx 7 is reflected by the lens system 8, illuminating the entire track 4 in which the IR information is recorded. The illuminated mound of the information track 4 is captured by the sensor array 10 by the imaging optical system 9.
An electric signal corresponding to the information recorded on the information track 4 is output from the sensor array 10. When the reading of the information track 4 is completed, the optical card 1 moves in the direction of arrow C, and the optical head 11 moves in the direction of arrangement of bands 3 (in the direction of arrow C), and reads 1' of the next 1R information track. *@i ftrc Tori 9 will be held on 111'' holiday. .

The sensor array IO includes a CCI) d sensor array (hereinafter abbreviated as CCD q array) and an MO8% sensor array (hereinafter abbreviated as mosg array) -#-.

When using a CCD type array (J, 14L loads accumulated in each sensor cell within a certain light time are simultaneously transferred for -IR report truck 9, the tail removal 9 is performed. When a type array is used, one round of scanning is carried out by line-scanning the -1 signal track of the sensor cell at a constant scanning time.

As mentioned above, in the case of a CCD g-array, the area of the optical card that is taken up by the output of a single sensor array in the event of a disaster is due to the μ card sending error and the light emitting time, and in the case of MO8 league play, the area of the optical card is taken up by the output of the sensor array. It is determined by the feed speed and scanning time.

FIG. 12(a) is an explanatory diagram showing the reading area of an optical card by the CCD fi array, and FIG. 12(b) is an explanatory diagram showing the Ut removal operation of the optical card by the MO8 type array.

In FIG. 12(a), one information track of an optical card is simultaneously processed by a CCD array. Therefore, it is necessary to remove the area parallel to the bit arrangement direction of the HV right track of the optical card and the sensor cell arrangement direction of the sensor array (diagonal in the figure) and the bit arrangement direction of the information track. are parallel9. '#f, the width d of the roof area to be removed is determined by the card feeding speed and the flashing time of the CCD array.

In Fig. 12(b), the information for one track of the optical card is m for each sensor cell by MO8 type play.
Since it is read the tth time, t*4)? Even if the bit alignment direction of the track and the sensor cell alignment direction of the sensor array are parallel, the gun-picking legal area (mid-diagonal υ part) and the bit alignment direction of the information track are not parallel, and have a 7i1 rhombus of 0. Angle υ and width eu, card feed speed and MO8
The scanning time for alliance play can be reduced.

Figure 9 shows a partially enlarged view of the recording format of the large card shown in Figure 8. However, 9f+ov in the diagram
The part represents 1 and 11".

I was in the same map once, and I went to both towns on the news truck 4.
A start bit 21 indicating the beginning (1#) of the horizontal track 4 and a stop bit 22 indicating the end are provided. Both bits 21 and 22 are opposite to each other (i.e., if the -10,000 ζi IK information is 11", the other is "
Furthermore, the optical characteristics of both pits 21 and 22 are reversed for each information track.

The R line 5 is in the form of a 2-bit stripe as shown in the figure, and the reading operation of the 1''k information track 4 by the sensor array 1o detects the information ``001100't-'' of the separated area containing the 2 bits of the R line 5. It is started by doing. At that time, the information of the start bit 21 is stored, and the information of the stop bit 22 is stored when the reading of ω of the information track 4 is completed. In this way, record the information for both pits 21 and 22.
．． By doing so, since both bit information are inverted for each information track, it is possible to recognize that the sensor array 1o has started reading the information track on a new information track 1'. The means for detecting such a new information track is such that the sensor array 100 runs and the optical card moves asynchronously, and the sensor array 10 tracks one rack several times. Required if

[Purpose of the invention]

However, if the focus alignment direction of the information track 4 and the sensor cell alignment direction of the sensor array 10 are not completely parallel but have a certain angle, this may be caused by manufacturing variations of the IH information record carrier or convenience of the information record carrier. etc., but in such a case, the sensor array 1
In some cases, the information on two information tracks is simultaneously divided into left and right sides. If the R line is formed over the entire track width, even if the R line is completely imaged on the sensor array 10, information beyond the R line will not be extracted for the above reason. Since the information on the same information track is not compatible with the R fin, it has been desired to improve the ability to read information from the information track.

SUMMARY OF THE INVENTION An object of the present invention is to meet these demands and provide an h\information record carrier that can reliably identify each information track.

[Summary of the invention]

The above purpose is to arrange a plurality of information tracks in a 71ic
In the information recording carrier, the length in the direction approximately perpendicular to the bit M direction of the information track of the information recording section in the area for separating and identifying any one information track is determined in the bit arrangement direction of the information track of the information track. Achieved by the information recording carrier of the present invention, characterized in that the information recording section (iii) is located on one side of the information track in the direction in which the bits are arranged, and is located further away from the long field in the substantially orthogonal direction. be done.

[Effect]

According to the information recording carrier of the present invention, when the sensor cell alignment direction of the sensor array and the bit alignment direction of the information track are no longer parallel, the area of the sensor cells occupying the information recording section of the R line decreases, and the information track The sensor array can reliably identify and determine whether the sensor is selected or not. The present invention is particularly effective for sensor arrays such as MO8-type playbacks in which the bit arrangement direction of the information track and the cut-out area are specific.

〔Example〕

Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a schematic diagram showing a recording capacity of an embodiment of an information recording carrier according to the present invention.

FIG. 3 is an explanatory diagram showing the state of a track having a reference line and a sensor array according to the present invention.

In both figures, an information track 201 is separated from adjacent information tracks in the bit arrangement direction of the information track 201 by a separation region 202. In addition, the identification area 205 serves as a pit/dot for the information track 201, and also serves as the separation area 202 to separate and identify adjacent information tracks in the direction orthogonal to the bit arrangement direction. accomplish

Further, a plurality of tracks each including an FF information track 201, a separation area 202, and an identification area 205 are arranged to form a band 203. The band 203 is arranged in multiple rows,
A row of separation regions 202 within band 203 separates adjacent information tracks.

Each unit data area 204 is composed of 5 bits, and the data to be stored is converted 415 times according to the conversion rules shown in Table 1, and further converted into NRZr and recorded.

Table 1 and FIG. 2 are explanatory diagrams of the 415 NRZ I modulation method adopted in this example. As shown in the figure, the hexadecimal data Eφ is converted to 415 and then NRZ I modulated, but the 1d signal recorded by the NRZI modulation method has one phase with lengths of T, 2T, and 3T. Contains only numbers.

Here, T is the minimum inversion interval of the signal, and corresponds to 1 bit in the recording format shown in FIG. That is, the 11v report recorded on the 1'# report track 201 does not include an inversion interval of 4T or more.

Therefore, in this embodiment, an area having an inversion interval of 4T is used as the separation area 202 for separating the information tracks. For example, as shown in Figure 2, "100001
A separation signal of `` is recorded in the reading direction or arrangement direction of the information track.

Of course, the information is not limited to this, and the information may be recorded in such a way that it can be distinguished when read.

The 415 NRZ I modulation method according to this embodiment has a higher accuracy in detecting the R line and identifying the information track than in the case where the information "001100" of the separated area shown in FIG. 49 is used. That is, when R line detection is performed using the information "001100" of the separated area, there is a possibility [F] that this information is also included in the information track.

It also has a unit data area 204 of 6 systems, consisting of a total of 80 bits, but in this embodiment, it is provided in the preamble area to obtain the self-clock during playback. I can't. However, there may be a preamble area.

In this way, from the separation area 202 to the information track 20
1 contains consecutive identical symbols that do not appear in R.
Detection of line 209 is certain.

Furthermore, the length (hereinafter referred to as width) in the direction approximately perpendicular to the bit arrangement of the information track of the t#m recording section 209a (oblique section in the figure) of the R line 209 is calculated as the +*w track other than the R line 209. As shown in FIG. 3, by forming the R line 209 to be shorter than the width of the R line 209, even if the parallelism of the area where the information track 201 and the sensor array 10 resist is not aligned, the R line 209 can be completely formed on the sensor array 10. to Vt
If so, it is guaranteed that the entire sensor array 10 is on the same information track.

When using MO8fi play, the above-mentioned figure 12 (b
), the actual reading area and the information track have a certain angle, so the position of the R line 209 with the shortened width of the information recording section 209a is set to one side of the information track in the fk information alignment direction as shown in FIG. By arranging the sensors to one side, it is possible to increase the probability that the entire sensor array exists on the same information track.

The width of the information recording section 209a of the R line 209 is determined by the angle between the bit arrangement direction of the information track and the reading area.
Sensor array readout cycle, cart feeding speed,
It is determined by factors such as the size of the sensor cell of the sensor array, the magnification of the reading optical system, and the ratio between the length of the f# information track in the bit alignment direction and the length of the R2-in information track in the bit alignment direction.

Among the above factors, if the quality of the bit arrangement direction of the information track 201 is equal to or smaller than the length of the information track of the R line 209 in the bit arrangement direction, the information recording of the R line The width of the portion 209a is 1
# The need for shortening the information track 201 and the wL sampling area of the sensor array 10 is reduced due to the increased tolerance for parallelism; however, the information track 20
The length of the information track 1 in the bit alignment direction is set to be sufficiently larger than the length of the +-s@i track of the R line 209 in the bit alignment direction, in order to increase the information density.
The information recording carrier of the present invention is effective. In the embodiment shown in FIG. 1, the ratio between the width of the information track and the width of the information recording section 209a of the R line 209 is approximately A. If the width of the information track 209a of the R line 209 is the same as the width of the information track other than the R line, as shown in FIG. At the right end of the sensor array 10, it is possible that an information line different from the R line that has been removed is being read.

In particular, when the width of the 19th information recording section of the R line is narrower than the track width, the information on the R2-in is inverted every time it moves to the next information track, and a new information track is created. It is also possible to identify when the change has occurred.

In addition, the Hibetsu Kou Area 205 (is made up of 2 or more bits and is created by changing the bit numbers and turns between adjacent tracks. By using this configuration, it is possible to use the role of the end bit and the transition to a new information track. 1″# of identification area 205
Since the information changes, it is possible to identify when a new information track has been moved.

In addition, by using both the separation area 202 and the identification area 205 to identify that the information track has moved to V
Any information track can be separated and identified from other information tracks with high precision.

It is garbage because the identification area is set to 2 bits or more.

#) The accuracy of errors is reduced.

In the embodiment shown in wJ1, it is 2 bits.

Next, an embodiment of the method for reproducing the information recording carrier will be described. Here, the original card is taken up as an information record carrier in 1 having the recording format shown in FIG. 1, and the Nyuso d shown in Section 10 is used as a device for erasing and completely reading from the optical card.

Furthermore, as shown in FIG. 5, one bit 206 in the recording area of the optical card corresponds to cell 2 of the sensor array 10.
The optical magnification is selected so that four images of 07 are formed. For example, the size of 1 bit 206 on an optical card is 1
If the thickness of the cell 207 of the -dimensional sensor array 10 is 0 μm and the thickness of the cell 207 is 15 μm, the imaging optical head 9 may be provided with a magnification of 4×15/10=6 (times).

FIG. 6 is an explanatory diagram showing a method for reproducing a t'# information record carrier according to the present invention.

In the figure, there is a band 203 in the recording area on the optical card.
and bands 203a and 20 adjacent to band 203.
3b and each band's information track 201゜201a, 2
Separation area 2 for separating 01b and % information track
02, 202a, and 202b are formed in the format shown in FIG.

Here, one band track consists of a separation area (6 bits), an information track (80 bits), and an identification area 2 bits, totaling 8 bits.
It is made up of 8 bits. Therefore, one band track has 352 cells 207 on the sensor array 10.
imaged on top.

Therefore, here, a MOS having 512 cells 207 is used.
An information track 201 used as the BM sensor array 10 and adjacent to the information track 201 to be continued.
The reading area 208 is set so that JL and a part of 201b are also imaged on the sensor array 10.

By providing the read vA area 208 in this manner, the clock can be taken out at the time of reading without providing a preamble area for obtaining a self-clock in the information track 201 serving as the read translation. That is, the sensor array 1 is
When 0 runs uphill, for example, 9 takes out a reproduction clock using information from a part of the information track 201a. Then, from the time when the separation area 202 is detected, the information that has been completely recorded on the ↑ floating information track 201 is reproduced using the extracted clock, and the information reproduction operation is stopped when the separation area 202b is detected.

Next, a reproducing apparatus that implements the optical card information reproducing method according to the present invention will be described.

FIG. 7 is a block diagram of an optical card reproducing apparatus that implements the above reproducing method.

In the same figure, a sensor array 10 having a cutout region 208 is driven by a drive clock 307 from a sensor array driver 306, and its output signal 308 is also amplified by the driver 306 and converted into a video signal 309 by a binarization circuit. 310. The binarization circuit 310 binarizes the PLL circuit 3 as 311.
Clock regeneration is performed at step 12. The PLL circuit output 313 is divided into a data section, a reference line section, and an end bit section, and is input to an NRZI demodulation circuit 314, a reference line detection circuit 316, and an end bit detection circuit 317. The r-yuto is demodulated into 315 by the NRZI Matata pitch circuit 314 and input to the 5/4 variation circuit 318. At the same time, the respective reference lines] and end bits are detected and the respective detection signals 319, 320 enter the 5/4 conversion circuit 318 when the information track of interest is separated and identified. When the detection signals 319 and 320 are input at the same time, the signal 3 from the NRZI demodulation circuit 314
15 is converted by a 5/4 conversion circuit 318, and the information is output as a reproduction signal to 1' of the information track of interest.

In R line detection, as mentioned above, in principle, the signal inversion interval can be determined by T, 2T, and 3T, so "011110"
When the interval of 4T is reached, the R line can be detected.

Furthermore, a signal other than '011110'' comes and 01 again.
By detecting 1110", it can be determined that the track has moved to a new track. By detecting the end bit, 01" can be determined.
It can be identified that the track has moved to a harder track by changing from "10" or vice versa to "01#".The detection status of the R line and end bit is memorized and the track is sequentially moved to the next track. If both R-line detection and end focus detection are used to identify the difference, 1. Even if the parallelism between the fin sensor and the track is lost, it will be possible to prevent malfunctions during playback and anti-skid errors.

Although the case of the 415NRZI modulation method is shown here, the present invention is applicable to any modulation method that is self-clockable and requires an area for obtaining an information clock, such as MFM or EFM modulation method. It is.

Furthermore, it is clear that the contact area used for extracting the reproduced clock may be the entire adjacent information track or an area spanning a plurality of bands.

Further, the present invention can be applied to record carriers such as magneto-optical record carriers of a type in which the magnetization direction is reversed, record carriers with concave and convex bits, and the like.

〔Effect of the invention〕

As described in detail above, according to the information recording carrier of the present invention, each information track can be reliably identified, so malfunctions and reading errors during reproduction can be prevented, and when This is effective when using a sensor array in which the bit arrangement direction of the information track and the viewing area are not parallel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a recording format of an embodiment of an information record carrier according to the present invention. FIG. 2 is an explanatory diagram of the 415NRZI modulation method adopted in this embodiment. FIG. 3 is an explanatory diagram showing the state of the sensor array and a track having m unreal rows of reference lines. FIG. 4 is an explanatory diagram showing the state of the sensor array and the track having reference lines. FIG. 6 is a diagram explaining the correspondence between the array and the recording area of the optical card; FIG. 6 is an explanatory diagram showing a non-embodiment reproduction method; FIG. 7 is a block diagram of an optical card reproduction device implementing the above reproduction method. , FIG. 8 is a schematic plan view showing the recording format of the optical card, and FIG. 9 is a partial enlarged view of the recording format. FIG. 10 is a schematic diagram of the optical card reproducing device. FIG. 11 is an explanatory diagram showing nine reading operations of the reading head section. Figure 12(a) is an explanatory diagram showing the reading area of an optical card by a CCD fi array, and Figure 12(b) is an explanatory diagram showing the reading area of an optical card by a MOS type array.10... Sensor array, 201...information track,
202... Separation region, 203... Band, 204...
...Unit data area, 205...Identification area, 206.
...Bit, 209...R line, 209a...Information Recording Department Agent Patent Attorney Jo Taira Yamashita Figure 1 Figure 2 εψ Approximate Figure 3 Figure 4 11 1; L+-10 Mouth Figure 8 - λ- Figure 9 Figure 10

Claims (1)

[Claims] In an information recording carrier in which a plurality of information tracks are arranged, the length in a direction substantially perpendicular to the bit arrangement direction of the information track of the information recording section in an area for separating and identifying any one information track. is shorter than the length of the information track in a direction substantially orthogonal to the bit arrangement direction of the information track,
The information recording carrier is characterized in that the information recording section is located off-centered to one side of the information track in the bit alignment direction.