Title:
【発明の名称】フィルム上の専用磁気トラックを用いる自己クロッキングコード化/復号化フィルム情報交換システム
Document Type and Number:
Japanese Patent JP2911155
Kind Code:
B2
Abstract:
A virtually transparent magnetic layer is included as an additional layer in a color negative film. Information exchange between various users of the film-such as (for example) the film manufacturer, the camera user, the dealer and photofinisher-is carried via plural longitudinal magnetic tracks on the film that begin and end in individual frames. Each track is dedicated to the writing and reading of a predetermined set of parameters related to the corresponding frame. The photofinisher-dedicated tracts fill the exposed image area of each frame. The camera-dedicated tracks lie along the edges of the film between the film perforations, the perforations being widely spaced for this purpose. All data is recorded on the film using a novel self-clocking code which is completely self-clocking, in order to provide automatic data synchronization between the various users without requiring that any of them to transport the film at the same speed or even at a uniform speed when reading and writing. A start sentinel character and stop sentinel character, each having a predetermined self-clocking encoded binary bit sequence, are placed at the beginning and end of each track respectively, and facilitate automatic detection of film transport direction.
Inventors:
UOTSUSHU MAIKERU RII
HOITSUTOFUIIRUDO AASAA ARAN
HOITSUTOFUIIRUDO AASAA ARAN
Application Number:
JP51091289A
Publication Date:
June 23, 1999
Filing Date:
October 04, 1989
Export Citation:
Assignee:
IISUTOMAN KODATSUKU CO
International Classes:
G03B17/24; G03B27/46; G03C11/02; G03B31/00; G03C1/76; G03D15/00; G11B5/633; G11B13/04; (IPC1-7): G03B17/24; G03C1/76
Domestic Patent References:
| JP32905Y2 |
Attorney, Agent or Firm:
Masatake Shiga (3 outside)