Information reproducing apparatus and camera
AssigneeCanon Kabushiki Kaisha
InventorToshiharu Ueda
Life of this patent
Estimating the term…
Abstract
In a camera which reproduces information recorded at a magnetic recording part of each frame of a film, a reproducing circuit is arranged to make a discrimination, without being affected by noises, between the presence and absence of information recorded on the film and to lessen errors of reproduction of information, a noise removing filter is arranged to have a variable passband, and a passband switch-over circuit is arranged to vary the passband of the filter between a passband to be set in making the discrimination between the presence and absence of information recorded on the film and a passband to be set in performing a decoding action on the information recorded on the film.
Claims24
An information reproducing apparatus having a detecting circuit which detects an information signal recorded on a recording medium and a filter which receives a signal from said detecting circuit,
- a passband of said filter being arranged to be variable,
- said information reproducing apparatus comprising a varying circuit which varies the passband of said filter between a passband to be used when said information reproducing apparatus performs a deciding action to decide whether or not information is recorded on the recording medium and a passband to be used when said information reproducing apparatus performs a decoding action to decode information recorded on the recording medium.
A camera equipped with an information reproducing apparatus having a head which reads information recorded on a recording area provided for each of frames of a film and a filter which receives a signal from said head,
- a passband of said filter being arranged to be variable,
- said camera comprising a varying circuit which varies the passband of said filter between a passband to be used when said information reproducing apparatus performs a deciding action to decide whether or not information is recorded on the recording area and a passband to be used when said information reproducing apparatus performs a decoding action to decode information recorded on the recording area.
An information reproducing apparatus having a detecting circuit which detects an information signal recorded on a recording medium and an amplifying circuit which amplifies a signal from said detecting circuit,
- a gain of said amplifying circuit being arranged to be variable,
- said information reproducing apparatus comprising a varying circuit which varies the gain of said amplifying circuit between a gain to be used when said information reproducing apparatus performs a deciding action to decide whether or not information is recorded on the recording medium and a gain to be used when said information reproducing apparatus performs a decoding action to decode information recorded on the recording medium.
A camera equipped with an information reproducing apparatus having a head which reads information recorded on a recording area provided for each of frames of a film and an amplifying circuit which amplifies a signal from said head,
- a gain of said amplifying circuit being arranged to be variable,
- said camera comprising a varying circuit which varies the gain of said amplifying circuit between a gain to be used when said information reproducing apparatus performs a deciding action to decide whether or not information is recorded on the recording area and a gain to be used when said information reproducing apparatus performs a decoding action to decode information recorded on the recording area.
A reproducing apparatus having a reproducing circuit which reproduces information recorded on a recording medium, said reproducing apparatus comprising:
- a level deciding circuit which decides the level of a reproduced signal from said reproducing circuit;
- and
- a processing circuit which performs, on the recorded information, functional processing that varies according to a result of decision made by said level deciding circuit.
A camera equipped with a reproducing apparatus having a reproducing circuit which reproduces information recorded on a recording area provided for each of frames of a film, said camera comprising:
- a level deciding circuit which decides the level of a reproduced signal from said reproducing circuit;
- and
- a processing circuit which performs, on the recorded information, functional processing that varies according to a result of decision made by said level deciding circuit.
Dependencies are inferred from the claim text.