WO1999039300A1 - Digital data storage - Google Patents
Digital data storage Download PDFInfo
- Publication number
- WO1999039300A1 WO1999039300A1 PCT/AU1998/000382 AU9800382W WO9939300A1 WO 1999039300 A1 WO1999039300 A1 WO 1999039300A1 AU 9800382 W AU9800382 W AU 9800382W WO 9939300 A1 WO9939300 A1 WO 9939300A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- digital data
- photosensitive medium
- matrix form
- dot matrix
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1384—Fibre optics
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
Definitions
- This invention relates broadly to the recording of digital data onto a photosensitive medium, in particular but not exclusively for long term archival storage of the data.
- the invention also relates to the retrieval of the data from the photosensitive medium.
- Photosensitive media such as used in photographic film can store "optical" information for up to 100 years with sustained contrast and this feature has been utilised for storing visually readable information on what is commonly referred to as microfilm.
- One example involves the library storage of book pages on "microfiche”.
- Such information is stored on the photosensitive medium by normal photogiaphic processing of the information, that is by either photographing a hard copy of the relevant data or by photographing such data off a computer screen.
- the present invention provides an apparatus for recording digital data onto a photosensitive medium.
- the apparatus includes means for storing the digital data, means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, and an optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium.
- the digital data is stored on the photographic medium in dot matrix form, that is without converting the data into a corresponding "intelligible" form such as text or graphics. Further, the data in dot matrix form may be compacted in the transfer process to achieve a storage density which is limited only by the grain size of the photosensitive medium to resolve the dot matrix form - 3 - representation of the digital data.
- the means for displaying the digital data may comprise a liquid crystal display (LCD) for displaying the whole or selected portions of the digital data which is held by the storing means.
- LCD liquid crystal display
- the means for displaying the digital data may comprise means for converting a digital signal containing the digital data into an optical signal, a bundle of optical fibres arranged to display the digital data in dot matrix form, and means for coupling components of the optical signal which correspond with respective bits of the digital data into respective ones of the optical fibres .
- the present invention also provides an apparatus for retrieving digital data which is stored in dot matrix form on a photosensitive medium.
- the apparatus comprises an optical system arranged to view the digital data stored on the photosensitive medium and to couple components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
- the means for converting the coupled components may comprise a bundle of optical fibres arranged in a manner so as to effect coupling of the components into respective ones of the bundle of optical fibres.
- the present invention may be defined further as providing a method for recording digital data onto a photosensitive medium.
- the method comprises the steps of storing the digital data, displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, and transferring the digital data in the dot matrix form onto the photosensitive medium utilising an optical system.
- the present invention may be defined further as providing a method for retrieving digital data which is - 4 - stored in dot matrix form on a photosensitive medium.
- the method comprises the steps of viewing the digital data stored on the photosensitive medium utilising an optical system, coupling components of the viewed data into means for converting the coupled components into a digital signal and converting the coupled components into a digital signal corresponding to the digital data.
- the present invention may be defined further as providing an apparatus for recording digital data onto a photosensitive medium and for retrieving digital data which is stored in dot matrix form on a photosensitive medium.
- the apparatus comprises means for storing the digital data, means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, a first optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium.
- the apparatus further comprises a second optical system arranged to view the digital data stored on the photosensitive medium and to couple components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
- the present invention may be defined further as providing a method of recording digital data onto a photosensitive medium and retrieving digital data which is stored in dot matrix form on a photosensitive medium.
- the method comprises both the steps of the method for recording digital data onto a photosensitive medium and the steps of the method for retrieving digital data which is stored in dot matrix form on a photosensitive medium as defined hereinbefore.
- the invention may be used for recording/retrieving single frames of digital data.
- the invention may be used for storing/retrieving successive frames of digital data.
- the - 5 - apparatus of the invention preferably comprises means for moving the photosensitive medium between storing/retrieving successive frames of digital data.
- the photosensitive medium in the invention as above defined is preferably a photographic film.
- Figure 1 is a schematic diagram of an apparatus for storing digital data on to a photosensitive medium.
- Figure 2 is a schematic diagram of another apparatus for storing digital data onto a photosensitive medium.
- Figure 3 is a schematic diagram of an apparatus for reading digital information stored on a photographic medium.
- FIG. 1 shows an apparatus 100 for storing digital information onto photosensitive medium.
- the apparatus 100 includes a storing unit 110 for storing digital data.
- the storing unit 110 may be arranged to generate the digital data.
- the digital data may be received from various sources such as a hard disc, a scanner, a disc drive or a CD ROM drive.
- the apparatus 100 further includes a display unit 111 comprising a control unit 112 which is arranged to receive the digital data which is stored in the storing unit 110 and to output a control signal (via connection 114) which controls a back lid liquid crystal display (LCD) 116 of the display unit 111.
- LCD liquid crystal display
- the LCD 116 comprises a plurality of components 118 which each display respective bits of the digital data as a - 6 - result of the control signal received from the control unit 112.
- the control unit 112 can be arranged to enable manipulation of the digital data prior to creating the output signal, e.g. to effect encoding of the digital data.
- the apparatus 100 further includes an optical system 120 arranged to photograph the LCD 116 onto a film 122 loaded in camera unit 124.
- Figure 2 shows another apparatus 10 for storing digital information on to photosensitive medium.
- the apparatus 10 comprises the storing unit 110 and the display unit 111.
- the apparatus 10 further comprises a bundle of optical fibres 20 arranged in a manner such that the light signal of each component 118 of the LCD 116 can be coupled into respective ones of the optical fibres 20.
- Cross sectional end portions 23 of the fibres are arranged in an array 22.
- the apparatus 10 further comprises an optical system 24 arranged to expose the photographic film 122 loaded in the camera unit 124 to light signals from the cross sectional end portions 23 in the array 22. Thereby, a photo of the array 22 can be taken containing digital data in a dot matrix form as a corresponding contrast pattern (not shown) on the photographic film 122. After a pull down of the photographic film 122 in the camera unit 124 subsequent bit arrays may be stored on the photographic film 122 in a predetermined order.
- FIG. 3 shows an apparatus 40 for reading digital information stored on a photographic medium.
- the apparatus 40 includes a projector unit 42 in which a photographic film 44 can be loaded and images thereon projected into the projection plane 46 utilising a light source 43 and an optical system 41.
- the apparatus 40 includes a plurality of optical fibres 48 arranged with cross sectional end portions 49 of the fibres in the projection plane 46.
- components of the projected optical signal are coupled into respective ones of the plurality of optical fibres 48 and transmitted via the optical fibres to a converter unit 52 of the apparatus 40.
- the converter unit 52 includes an optical to digital signal converter 54 in which the optical signal received from the optical fibres are individually converted into a digital signal which is then transferred to a control unit 56.
- the control unit 56 stores and arranges the digital signal in a predetermined bit array corresponding to the digital data stored on the photographic film 44 which can then be down loaded as an electronic, digital signal for use in eg. a central processor unit 60 of a computer (not shown) .
- the control unit 56 can be arranged to enable manipulation of the digital data, eg. to effect decoding of the digital data or removing unwanted data from the stored digital data.
- the grain size of the photographic films 26, 44 described hereinbefore is lO ⁇ m
- lOGiga-Bits of digital data in dot-matrix from may be stored thereon per square meter.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
An apparatus for recording digital data onto a photosensitive medium (122) and for retrieving digital data which is stored in dot matrix form on a photosensitive medium (44), the apparatus comprising means for storing (110) the digital data, means for displaying (111) the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, a first optical system (120) arranged to transfer the digital data in the dot matrix form onto the photosensitive medium (122). The apparatus further comprises a second optical system (41) arranged to view the digital data stored on the photosensitive medium (44) in the dot matrix form and to couple components of the viewed data into means for converting (54) the coupled components into a digital signal corresponding to the digital data.
Description
- 1 -
Digital Data Storage
Field of the Invention
This invention relates broadly to the recording of digital data onto a photosensitive medium, in particular but not exclusively for long term archival storage of the data. The invention also relates to the retrieval of the data from the photosensitive medium. Background of the Invention
To date, most digital information has been stored by utilising magnetic storage devices such as discs, hard discs, tapes and the like. The lifetimes of such storage devices are determined by their ability to maintain magnetically encoded data with a sufficient contrast and typically are of the order of 20 to 40 years. In newer storage devices such as compact discs (CD) again the lifetime is limited as a result of degradation of the stored information due to exposure to radiation. Whilst these lifetimes are sufficient for most domestic users and some smaller commercial users, it will be appreciated that a storage medium that provides a longer life of stored data would be advantageous.
Photosensitive media such as used in photographic film can store "optical" information for up to 100 years with sustained contrast and this feature has been utilised for storing visually readable information on what is commonly referred to as microfilm. One example involves the library storage of book pages on "microfiche". Such information is stored on the photosensitive medium by normal photogiaphic processing of the information, that is by either photographing a hard copy of the relevant data or by photographing such data off a computer screen.
The use of photographic film to store digital information, in particular digital soundtracks on motion picture film, is also known in the art. For example, US Patent 4,600,280 describes a technique for recording a
- 2 - digital soundtrack on a film strip by exposing the film to modulated light from a light source. In another method disclosed in the same patent an intermittent light beam (encoded with digital audio information) is scanned horizontally across the film and the film is then advanced vertically and the scanning process repeated. In an alternative mode the light is projected onto the film through a linear array of solid state shutters or Bragg cell modulators. However, to date, storage of digital information on to photosensitive medium by the process of photographing light signals has not proven to be competitive in terms of the density of data that can be accommodated due to limitations in the optical reduction onto the film whilst maintaining minimum contrast/focus requirements.
That is, no satisfactory method of storing digital data on photosensitive medium has previously been available to enable full advantage to be taken of the long storage life of the data on such a medium. Summary of the Invention
The present invention provides an apparatus for recording digital data onto a photosensitive medium. The apparatus includes means for storing the digital data, means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, and an optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium.
The digital data is stored on the photographic medium in dot matrix form, that is without converting the data into a corresponding "intelligible" form such as text or graphics. Further, the data in dot matrix form may be compacted in the transfer process to achieve a storage density which is limited only by the grain size of the photosensitive medium to resolve the dot matrix form
- 3 - representation of the digital data.
The means for displaying the digital data may comprise a liquid crystal display (LCD) for displaying the whole or selected portions of the digital data which is held by the storing means.
Alternatively, the means for displaying the digital data may comprise means for converting a digital signal containing the digital data into an optical signal, a bundle of optical fibres arranged to display the digital data in dot matrix form, and means for coupling components of the optical signal which correspond with respective bits of the digital data into respective ones of the optical fibres .
The present invention also provides an apparatus for retrieving digital data which is stored in dot matrix form on a photosensitive medium. The apparatus comprises an optical system arranged to view the digital data stored on the photosensitive medium and to couple components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
The means for converting the coupled components may comprise a bundle of optical fibres arranged in a manner so as to effect coupling of the components into respective ones of the bundle of optical fibres.
The present invention may be defined further as providing a method for recording digital data onto a photosensitive medium. The method comprises the steps of storing the digital data, displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, and transferring the digital data in the dot matrix form onto the photosensitive medium utilising an optical system.
The present invention may be defined further as providing a method for retrieving digital data which is
- 4 - stored in dot matrix form on a photosensitive medium. The method comprises the steps of viewing the digital data stored on the photosensitive medium utilising an optical system, coupling components of the viewed data into means for converting the coupled components into a digital signal and converting the coupled components into a digital signal corresponding to the digital data.
The present invention may be defined further as providing an apparatus for recording digital data onto a photosensitive medium and for retrieving digital data which is stored in dot matrix form on a photosensitive medium. The apparatus comprises means for storing the digital data, means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data, a first optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium. The apparatus further comprises a second optical system arranged to view the digital data stored on the photosensitive medium and to couple components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
The present invention may be defined further as providing a method of recording digital data onto a photosensitive medium and retrieving digital data which is stored in dot matrix form on a photosensitive medium. The method comprises both the steps of the method for recording digital data onto a photosensitive medium and the steps of the method for retrieving digital data which is stored in dot matrix form on a photosensitive medium as defined hereinbefore.
The invention may be used for recording/retrieving single frames of digital data. Alternatively, the invention may be used for storing/retrieving successive frames of digital data. In the latter embodiment, the
- 5 - apparatus of the invention preferably comprises means for moving the photosensitive medium between storing/retrieving successive frames of digital data.
The photosensitive medium in the invention as above defined is preferably a photographic film.
The invention will be more fully understood from the following description of preferred embodiments of an apparatus for storing digital data onto a photosensitive medium and of an apparatus for reading digital data stored on a photosensitive medium. The description is provided with reference to the accompanying drawings. Brief Description of the Drawings In the drawings
Figure 1 is a schematic diagram of an apparatus for storing digital data on to a photosensitive medium.
Figure 2 is a schematic diagram of another apparatus for storing digital data onto a photosensitive medium.
Figure 3 is a schematic diagram of an apparatus for reading digital information stored on a photographic medium.
Detailed Description of the Preferred Embodiments
Figure 1 shows an apparatus 100 for storing digital information onto photosensitive medium. The apparatus 100 includes a storing unit 110 for storing digital data. The storing unit 110 may be arranged to generate the digital data. Alternatively, the digital data may be received from various sources such as a hard disc, a scanner, a disc drive or a CD ROM drive. The apparatus 100 further includes a display unit 111 comprising a control unit 112 which is arranged to receive the digital data which is stored in the storing unit 110 and to output a control signal (via connection 114) which controls a back lid liquid crystal display (LCD) 116 of the display unit 111. The LCD 116 comprises a plurality of components 118 which each display respective bits of the digital data as a
- 6 - result of the control signal received from the control unit 112. The control unit 112 can be arranged to enable manipulation of the digital data prior to creating the output signal, e.g. to effect encoding of the digital data. The apparatus 100 further includes an optical system 120 arranged to photograph the LCD 116 onto a film 122 loaded in camera unit 124.
Figure 2 shows another apparatus 10 for storing digital information on to photosensitive medium. The apparatus 10 comprises the storing unit 110 and the display unit 111.
The apparatus 10 further comprises a bundle of optical fibres 20 arranged in a manner such that the light signal of each component 118 of the LCD 116 can be coupled into respective ones of the optical fibres 20. Cross sectional end portions 23 of the fibres are arranged in an array 22. The apparatus 10 further comprises an optical system 24 arranged to expose the photographic film 122 loaded in the camera unit 124 to light signals from the cross sectional end portions 23 in the array 22. Thereby, a photo of the array 22 can be taken containing digital data in a dot matrix form as a corresponding contrast pattern (not shown) on the photographic film 122. After a pull down of the photographic film 122 in the camera unit 124 subsequent bit arrays may be stored on the photographic film 122 in a predetermined order.
Figure 3 shows an apparatus 40 for reading digital information stored on a photographic medium. The apparatus 40 includes a projector unit 42 in which a photographic film 44 can be loaded and images thereon projected into the projection plane 46 utilising a light source 43 and an optical system 41. The apparatus 40 includes a plurality of optical fibres 48 arranged with cross sectional end portions 49 of the fibres in the projection plane 46. When digital data stored on the film 44 in a dot matrix form is
- 7 - projected into the projection plane 46, components of the projected optical signal are coupled into respective ones of the plurality of optical fibres 48 and transmitted via the optical fibres to a converter unit 52 of the apparatus 40. The converter unit 52 includes an optical to digital signal converter 54 in which the optical signal received from the optical fibres are individually converted into a digital signal which is then transferred to a control unit 56. The control unit 56 stores and arranges the digital signal in a predetermined bit array corresponding to the digital data stored on the photographic film 44 which can then be down loaded as an electronic, digital signal for use in eg. a central processor unit 60 of a computer (not shown) . The control unit 56 can be arranged to enable manipulation of the digital data, eg. to effect decoding of the digital data or removing unwanted data from the stored digital data.
If, for example, the grain size of the photographic films 26, 44 described hereinbefore is lOμm, lOGiga-Bits of digital data in dot-matrix from may be stored thereon per square meter.
Claims
1. An apparatus for recording digital data onto a photosensitive medium, the apparatus comprising: means for storing the digital data; - means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data; and an optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium.
2. The apparatus as claimed in claim 1 wherein the means for displaying the digital data comprises a liquid crystal display (LCD) for displaying the whole or selected portions of the digital data which is held by the storing means.
3. The apparatus as claimed in claim 1 wherein the means for displaying the digital data comprises: means for converting a digital signal containing the digital data into an optical signal; - a bundle of optical fibres arranged to display the digital data in dot matrix form; and means for coupling components of the optical signal which correspond with respective bits of the digital data into respective ones of the optical fibres.
4. An apparatus as claimed in claim 3 wherein the means for converting the digital signal comprises a back lid LCD.
5. An apparatus as claimed in any one of the preceding claims wherein the means for storing the digital data comprises means for generating the digital data.
6. An apparatus for retrieving digital data which is stored in dot matrix form on a photosensitive medium, the apparatus comprising: an optical system arranged to view the digital data stored on the photosensitive medium and to couple - 9 - components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
7. An apparatus as claimed in claim 6 wherein the means for converting the coupled components comprises a bundle of optical fibres arranged in a manner so as to effect coupling of the components of the viewed data into respective ones of the bundle of optical fibres.
8. An apparatus for recording digital data onto a photosensitive medium and for retrieving digital data which is stored in dot matrix form on a photosensitive medium, the apparatus comprising: means for storing the digital data; means for displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data; a first optical system arranged to transfer the digital data in the dot matrix form onto the photosensitive medium; - a second optical system arranged to view the digital data stored on the photosensitive medium in the dot matrix form and to couple components of the viewed data into means for converting the coupled components into a digital signal corresponding to the digital data.
9. The apparatus as claimed in claim 8 wherein the means for displaying the digital data comprises a liquid crystal display (LCD) for displaying the whole or selected portions of the digital data which is held by the storing means .
10. The apparatus as claimed in claim 8 wherein the means for displaying the digital data comprises: means for converting a digital signal containing the digital data into an optical signal; a first bundle of optical fibres arranged to display the digital data in dot matrix form; - 10 - and means for coupling components of the optical signal which correspond with respective bits of the digital data into respective ones of the first bundle of optical fibres.
11. An apparatus as claimed in claim 10 wherein the means for converting the digital signal comprises a back lid LCD.
12. An apparatus as claimed in any one of claims 8 to 11 wherein the means for converting the coupled components comprises a second bundle of optical fibres arranged in a manner so as to effect coupling of the components of the viewed data into respective ones of the second bundle of optical fibres.
13. An apparatus as claimed in any one of claims 8 to 12 wherein the means for storing the digital data comprises means for generating the digital data.
14. A method for recording digital data onto a photosensitive medium, the method comprising the steps of: storing the digital data; - displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data; and transferring the digital data in the dot matrix form onto the photosensitive medium utilising an optical system.
15. A method for retrieving digital data which is stored in dot matrix form on a photosensitive medium, the method comprising the steps of: viewing the digital data stored on the photosensitive medium utilising an optical system; coupling components of the viewed data into means for converting the coupled components into a digital signal; and converting the coupled components into a digital signal corresponding to the digital data. - 11 -
16. A method for recording digital data onto a photosensitive medium and for retrieving digital data which is stored in dot matrix form on a photosensitive medium, the method comprising the steps of:, - storing the digital data; displaying the digital data in a dot matrix form, wherein each dot corresponds with a respective bit of the digital data; transferring the digital data in the dot matrix form onto the photosensitive medium utilising a first optical system; viewing the digital data stored on the photosensitive medium in the dot matrix form utilising a second optical system; - coupling components of the viewed data into means for converting the coupled components into a digital signal; and converting the coupled components into a digital signal corresponding to the digital data.
17. An apparatus as claimed in any one of claims 1 to 13 wherein the photosensitive medium is a photographic film.
18. A method as claimed in any one of claims 14 to 16 wherein the photosensitive medium is a photographic film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU75131/98A AU7513198A (en) | 1998-01-30 | 1998-05-22 | Digital data storage |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP1574 | 1998-01-30 | ||
| AUPP1574A AUPP157498A0 (en) | 1998-01-30 | 1998-01-30 | Digital data storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999039300A1 true WO1999039300A1 (en) | 1999-08-05 |
Family
ID=3805851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU1998/000382 Ceased WO1999039300A1 (en) | 1998-01-30 | 1998-05-22 | Digital data storage |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AUPP157498A0 (en) |
| WO (1) | WO1999039300A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4461552A (en) * | 1980-09-09 | 1984-07-24 | Levine Arnold M | Film sound track recording and playback system |
| US4553833A (en) * | 1983-02-02 | 1985-11-19 | Fuji Photo Film Co., Ltd. | Side printing apparatus |
| US4659198A (en) * | 1984-10-08 | 1987-04-21 | Societe Anonyme Dite: Aaton Rg. | Process and system for inscription of coded information on the marginal part of a perforated cinematographic film, and for reading this information |
| AU4833793A (en) * | 1992-09-28 | 1994-04-26 | Olympus Optical Co., Ltd. | Dot code and information recording/reproducing system for recording/reproducing dot code |
| EP0717398A2 (en) * | 1994-12-16 | 1996-06-19 | Olympus Optical Co., Ltd. | Information recording medium and information reproduction system |
| EP0764944A2 (en) * | 1995-09-20 | 1997-03-26 | Olympus Optical Co., Ltd. | Information recording medium for recording multimedia information as optical readable code data thereon and information recording reproducing system using the same |
-
1998
- 1998-01-30 AU AUPP1574A patent/AUPP157498A0/en not_active Abandoned
- 1998-05-22 WO PCT/AU1998/000382 patent/WO1999039300A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4461552A (en) * | 1980-09-09 | 1984-07-24 | Levine Arnold M | Film sound track recording and playback system |
| US4553833A (en) * | 1983-02-02 | 1985-11-19 | Fuji Photo Film Co., Ltd. | Side printing apparatus |
| US4659198A (en) * | 1984-10-08 | 1987-04-21 | Societe Anonyme Dite: Aaton Rg. | Process and system for inscription of coded information on the marginal part of a perforated cinematographic film, and for reading this information |
| AU4833793A (en) * | 1992-09-28 | 1994-04-26 | Olympus Optical Co., Ltd. | Dot code and information recording/reproducing system for recording/reproducing dot code |
| EP0717398A2 (en) * | 1994-12-16 | 1996-06-19 | Olympus Optical Co., Ltd. | Information recording medium and information reproduction system |
| EP0764944A2 (en) * | 1995-09-20 | 1997-03-26 | Olympus Optical Co., Ltd. | Information recording medium for recording multimedia information as optical readable code data thereon and information recording reproducing system using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| AUPP157498A0 (en) | 1998-02-26 |
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