Eastman-kodak Company

Fernando G Silva

Michael L Wash

Arthur A Whitfield

Paul L Taillie

Gary L Robison

Thomas J Quattrini

Dennis F Cullum

A magnetic head for a camera having a first track-forming portion, and an adjacent second track-forming portion wherein each track-forming portion is capable of either writing to or reading from a magnetic-memory portion of a film loaded in the camera and having a path of travel adjacent the head. According to the invention, the track-forming portion having read capability has a major dimension which is parallel to the plane of the film to allow an additional number of turns of wire to be wound without increasing the size of the camera. In addition, the second track-forming portion is preferably arranged furthest from the edge of the photographic image region of the film.

Compact magnetic head for a photographic camera

Overhead and data loss are reduced when transferring data via magnetic recording in a magnetic layer of an elongate photographic filmstrip, by providing a trappable data sentinel at the beginning of a data field. The data sentinel comprises a pair of reserved characters which establish a data character boundary for data in the field and also identify the nature of this data. The data sentinel is trapped by an identity comparator and also read by a host computer or processor. Data fields employing the data sentinel format can be embedded within a start sentinel/end sentinel track architecture.

Method and apparatus for magnetic communication via a photographic

The reliability of data transfer between stages of photographic filmstrip use and processing is enhanced by magnetically recording a limited data set repetitively along a wide track in a frame of the filmstrip. Plural laterally offset magnetic read heads monitor the data in the magnetic track and provide output data signals on parallel independently operating channels. The data content of the output data signals is examined to determine whether the data of an individual data signal contains corruption error. The combined linear and parallel redundancy of the system tends to ensure successful data transfer despite a less than perfect head-to-film interface and other data corrupting influences.

Method and apparatus for magnetically communicating via a photographic

An improved decoder circuit suitable for decoding an encoded binary data stream. The encoding is expected to generate a three-part code format, the format, in turn, comprising a pair of clock transitions that set-off a data transition. The improved decoder circuit establishes whether or not the expected format is in fact realized under arbitrary operating conditions, and in the event of a failure to realize the expected format, provides a suitable format for a subsequent decoding procedure.

Decoder circuit with missing clock generator

Electrical circuits suitable for decoding binary information, in accordance with a novel modulation method. The novel modulation method is referenced in the instant case, and it is explained that the method may be used when an encoding or decoding information transfer rate may be dependent on unpredictable and variable transfer rate velocities and accelerations. The present electrical circuits provide a novel means to realize the utility of the modulation method.

Circuit for decoding binary information

Electrical circuits suitable for decoding binary information, in accordance with either of two novel modulation methods. The novel modulation methods are referenced in the instant case, and it is explained that the methods may be used when an encoding or decoding information transfer rate may be dependent on unpredictable and variable transfer rate velocities and accelerations. The present electrical circuits provide a novel means to realize the utility of either of the modulation methods.

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Rochester, NY, United States of America

Fernando G Silva