JPS63117373A - Optical recording medium - Google Patents

Abstract

PURPOSE:To shorten a data transfer time by disposing plural data recording areas in parallel on an optical recording medium and recording and reproducing from two directions. CONSTITUTION:On addresses 6, 7 and the data recorded and reproduced in the plural data recording areas 2 disposed in parallel, the data is recorded or reproduced from the two directions and the addresses 6, 7 are recorded and reproduced from the two directions, the addresses 6, 7 are alternately dis posed at both opposite side ends in the adjacent data recording areas 2 and the recording and reproducing directions of the addresses 6, 7 and the data are set to two alternate both directions similarly. Therefore, at the time of recording and reproducing, the data recording area 2 by an optical recording and reproducing device 8, at least some data recording areas 2 are not complete ly returned to an original position but jumped to the next data recording area 2 to record and reproduce. Accordingly, the data transfer time can be shortened to a half to the maximum in comparison to the case when returning to the original position for every time due to a recording and reproducing only from one direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical recording medium for recording and reproducing information by optical means.

(Conventional technology).

In recent years, optical cards have come into use, which are optical recording media in the form of cards that record information as optically detectable data such as changes in reflectance, shape, and polarization.

Optical cards are broadly divided into playback-only optical cards that pre-record information, write-once optical cards that use heat-reactive materials to record additional information, and erasable optical cards that can record and play back information. Ru.

Therefore, there are two types of information recorded on an optical card: one is recorded when the card is manufactured, and the other is recorded after the card is manufactured.

Conventional write-once optical cards are shown in Figures 3 (a), (b) and 4.
This will be explained using figures. FIGS. 3(a) and 3(b) are diagrams showing a conventional optical card having a data recording area and an optical recording/reproducing device for recording and reproducing information on the card, and FIG. 4 shows the configuration of a conventional address. FIG. Figure 3 (a), (
b) and FIG. 4, 21 is an optical card, 22 is a data recording area, 23 is a track line, 24 is a data line, 25 is an address, 26 is an optical recording/reproducing device, 27 is a laser beam, 28 is a data bit, 29 is information, 30
is an "O" pit, and 31 is a [1] pit.

In the data recording area 22 of the optical card 21, several thousand data lines 24 are formed in parallel and divided by track lines 23. A laser beam 27 emitted from an optical recording/reproducing device 26 makes a relative reciprocating motion with respect to the optical card 21 along the track line 23 in the directions of arrows A and B, and outputs data bits 28, which are digitized information 29, to the data line 24. The data bits 28 that have already been recorded are reproduced and extracted as information 29.

The address 25 is formed when the optical card 21 is manufactured, and represents the address of the data line 24 using digital data of "0" and "1".

As shown in FIG. 4, address 25 has a long pit length.
It is composed of a "0" pit 30 and a "1" pit 31 with a short pit length, and each combination represents binary data,
It corresponds to address information representing the address of the data line 24, etc.

The address 25 is formed at the left end of the data line 24, and when the optical recording and reproducing device 26 records and reproduces data, it moves in the direction of arrow A as shown in FIG. Recording data bits 28 on data line 24 or reproducing data bits 28 that have already been written. Addresses 25 and data bits 28 are therefore read and recorded from left to right in the direction of arrow A on all tracks.

(Problems to be Solved by the Invention) When the optical recording/reproducing device 26 records data on the optical card 21 or reproduces data that has already been written, the case where all the plurality of data lines 24 are continuously recorded and reproduced. The problem is the total time.

FIG. 5 is a diagram showing a breakdown of the total time required for the optical recording and reproducing apparatus to start reproducing and recording one data line until it starts reproducing and recording the next data line. As shown in FIG. 5, the total time t for recording and reproducing one data line. is the sum of address playback time tll, data recording and playback time t2f, return time t for the optical recording/playback device to return in the direction of arrow B, and time t4 for jumping to the next data line. That is, t11=jt+tz+t3
It is represented by ``j4.'' It has been a conventional problem how to shorten this one data line recording and reproducing time tD to speed up data transfer.

The present invention provides an optical recording medium, such as an optical card, which allows data transfer to be performed at a much higher speed than in the past.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an optical recording medium such as an optical card for recording and reproducing information by optical means, in which a plurality of data on the optical recording medium is stored. The recording areas are arranged in parallel, and for the address and data to be recorded and reproduced in the small recording area, the data is recorded and reproduced from two directions, the address is recorded from two directions, or the address is adjacent to each other. The data recording area is provided alternately at left and right opposite ends, and the recording and reproducing directions of both the address and the data are similarly alternately left and right.

(Function) According to the present invention, with the above configuration, the optical recording and reproducing apparatus records and reproduces data in at least some of the data recording areas.

Recording and playback can be performed by jumping to the next data recording area without returning to the original position completely or at all.
Compared to the conventional case of recording and reproducing only from one direction and returning to the original position each time, the data transfer time can be reduced accordingly.

(Embodiment) First, an embodiment of claim (4) of the present invention will be described with reference to FIGS. 1(a) and 2(b) and FIG. 2. 1st
Figures (a) and (b) are diagrams showing an optical card having a data recording area according to an embodiment of the present invention and an optical recording/reproducing device for recording and reproducing information on the card, and Fig. 2 is an address diagram of the same embodiment. FIG. 2 is a diagram showing the configuration contents. 1(a), (b) and FIG. 2, 1 is an optical card, 2 is a data recording area, 3 is a track line, 4, 5 is a data line, 6, 7
is an address, 8 is an optical recording/reproducing device, 9 is a laser beam, 10 is a data bit, 11 is information, and 12 is an rOJ pit.

13 is a "1" pit.

In the data recording area 2 of the optical card 1, track lines 3 formed in parallel at equal intervals form several thousand columns of data lines 4, and provide a path for tracking control of the laser beam 9. A laser beam 9 emitted from an optical recording/reproducing device 8 records information 11 in the data line 4 in the form of digitized data bits 10 or extracts already recorded data bits 10 as information 11.

As shown in FIG. 1(b), addresses 6.7 indicating the address of the data line are placed at both ends, and are placed alternately on the left and right for each data line.

As shown in FIG. 2, the address 6.7 is composed of a long pit length "0" pit 12 and a short pit length "1" pit 13, and this rOJ pit 12 and "1" pit 13 are The address of each data line can be indicated by arranging them in base numbers from lowest to highest. The even address 6 is placed at the left end of the data line, and the reading direction is in the direction of arrow P, that is, from left to right.

Odd address 7 is placed at the right end of the data line,
The reading direction is the direction of arrow Q, that is, from right to left.

As shown in FIG. 1, the optical recording/reproducing device 8 tracks along the track line 3 in the data recording area 2 in the optical card 1 with a laser beam 9 emitted from it, while moving toward the left end of the card in the direction of arrow C. The information 11 at the address 6 indicating the address of the data line 4 is reproduced by moving horizontally from left to right.

After that, the optical recording/reproducing device 8 sends information 1 to the data line 4.
1 in the form of data bits 10, or while reproducing data bits 10 already written and extracting information 11, the card moves to the right end of the card.

When the optical recording/reproducing device 8 reaches the right end of the data line 4,
After jumping to the adjacent data line 5 along the arrow, move from right to left along the arrow E while tracking along the track line 3 again, and after reproducing address 7, the data in data line 5 is Record or play back and return to the left edge again.

In this way, the optical recording/reproducing device 8 can record or reproduce information on the data line of the data recording area 2 both when moving from left to right and when moving from right to left.

As a result, the recovery time t of the optical recording/reproducing apparatus shown in FIG. 5 can be eliminated. Since this return time t is almost the same as the data recording and reproducing time t2, the total recording and reproducing time tI per data line is approximately halved, and the data transfer speed can be approximately doubled.

Note that when recording and reproducing data in the data recording area 2 of the optical card 1, the optical recording and reproducing device 8 is moved along the arrows C, D, and E as described above.
Instead of moving along the data line, the same effect can be achieved by fixing the optical recording medium device @8 and moving the optical card 1 in the opposite direction of the arrow, and instead of forming the address in the data line. , the same effect can be achieved even if it is formed within the track line 3.

Furthermore, the addresses arranged alternately on the left and right in data lines 4 and 5 can be placed in the center, contrary to the above example, even if the addresses are placed at the right end and the odd addresses are placed at the left end, or even if they are not at both ends. The same effect can be obtained by placing it in the room.

Furthermore, as claimed in claims (1), (2), and (3), even if addresses and data in the data recording area of an optical recording medium such as an optical card are recorded and reproduced from two directions, Since the optical recording/reproducing device does not need to completely return to its original position for at least some data recording areas,
The return time t shown in FIG. 5 is longer than that in the case of only one direction as in the conventional example.

, and the data transfer time can be reduced accordingly.

Note that although an optical card is used as the optical recording medium in this embodiment, an optical disk may also be used.

(Effects of the Invention) The present invention provides a method for recording and reproducing addresses and data to be recorded and reproduced in a plurality of data recording areas arranged in parallel. Adjacent data recording areas are provided alternately at opposite ends of the left and right sides, and the recording and reproducing directions for both addresses and data are similarly alternately left and right, so that in either case, the optical recording/reproducing device records data in the data recording area. When performing playback, at least some data recording areas can be recorded and played back by jumping to the next data recording area without completely returning to the original position or without returning to the original position, so it is possible to record and play back from only one direction. Compared to the conventional case where the device returns to its original position one by one for reproduction, the data transfer time can be reduced by up to half.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are diagrams showing an optical card having a data recording area according to an embodiment of the present invention and an optical recording/reproducing device for recording and reproducing information on the card, and FIG. 1(a) is an elevational view. , (b
) is a plan view, FIG. 2 is a diagram showing the contents of the address structure of the same embodiment, and FIGS. 3(a) and 3(b) are a conventional optical card having a data recording area and information being recorded and reproduced on this card. FIG. 4 is a diagram showing an optical recording/reproducing device, in which (a) is an elevational view, (b) is a plan view, FIG. 4 is a diagram showing the configuration contents of a conventional address, and FIG.
The figure shows a breakdown of the total time required for the optical recording/reproducing apparatus to start reproducing/recording one data line until it starts reproducing/recording the next data line. 1... Optical card, 2... Data recording area, 3.
...Track line, 4,5...Data line,
6, 7... Address, 8... Optical recording/reproducing device,
9...Laser beam, 10...Data bit,
11... Information, 12... "O" bit, 1
3... "1" Pit. Figure 2 Roniniro 9 = x = Niro 8 Nikuchiro
7 Niroroni 6 Nironiro 5 Niniro = 4 220ro 3 Marubo A Y
Mizuzu 6.7・Ato Shimata 12""04t" 13 - 'IJ Hi'ato 3rd Figure'', 29 21 ・9 Card 22... Tie ↓ Self 4 Elephant Lead 9 23 Tokupukuku 4-24 ・Te-Cryso 27° Radiation Beam 28 ・Radio-9 Pit 29
+010 A mouth 22ro tool 9 = Niro 10008 0 Roroni 01117 20 knee 01106 022 = 01015 == Roni 01004 0 Ronnie 00113 2222 〇〇+02 S1 30 ・ I'0 , bit 31 ・ rl , c-t figure 5 address person 5 pestle support H day 9↓C 椪allowing Toooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong

Claims (4)

[Claims] (1) An optical recording medium for recording or reproducing information by optical means, characterized in that a plurality of data recording areas are arranged in parallel on the optical recording medium, and recording and reproduction are performed from two directions. . (2) The optical recording medium according to claim (1), wherein the optical recording medium is an optical card. (3) The optical recording medium according to claim (2), characterized in that the recording and reproducing directions of addresses representing the address, type, or characteristics of data in the data recording area are two directions. (4) The addresses of the data recording areas are provided alternately at opposite ends of the left and right sides of the adjacent data recording areas, and the recording and reproducing directions of both the addresses and data of the data recording areas are similarly arranged in two directions, alternately left and right. An optical recording medium according to claim (2), characterized in that: