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US 5,841,513 AGranted
Apparatus for reproducing sound signals recorded on a motion picture film with digital sound track
AssigneeSony Corporation
InventorsShunji Yoshimura, Yoshiyuki Akiyama, Kiyoshi Ohsato, Isao Ichimura, Toshio Watanabe, Shinji Katsuramoto
Life of this patent
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Abstract
A device for recording/reproducing a digital pattern as a sound track of a cinefilm is disclosed. The device includes a cinefilm 1 having an image recording area 2 in which an image is recorded, a perforation section 3 for film feed and digital pattern data recording areas 5 and 6 provided in the vicinity of the perforation section 3. Plural channels of audio data are recorded as the digital patterns in the digital pattern data recording areas.
Claims29
An apparatus for reproducing digitally recorded sound signals, comprising:
- motion picture film having formed thereon an optically-readable digital sound track and plural images, the motion picture film having a direction of travel, the motion picture film comprising an elongate, flexible substrate, the substrate having opposed edges and having a line of sprocket holes formed therein adjacent to each of the edges, an elongate digital pattern recording area on the substrate in the vicinity of one of the lines of sprocket holes, the digital pattern recording area having plural dots formed therein in a rectangular array of tracks substantially perpendicular to the direction of travel of the motion picture film, and columns in the direction of travel, each of the dots being in one of a first state and a second state optically distinct from one another, the digital pattern recording area being divided along the tracks into a first tracking pattern area and a second tracking pattern area, the dots in each tracking pattern area being in opposite states in consecutive tracks to form a vertical synchronizing pattern, and a signal pattern area disposed between the first tracking pattern area and the second tracking pattern area, the states of the dots in the signal pattern area representing a digital sound signal of at least one channel;
- a line sensor aligned perpendicular to the direction of travel of the motion picture film, the line sensor operative to read the digital pattern recording area;
- a timing circuit operative to generate a timing signal based upon the vertical synchronizing pattern read by the line sensor;
- a tracking servo circuit responsive to the timing signal, the tracking servo circuit operative to generate scanning timing signals for controlling reading by the line sensor;
- and
- a sound signal reproducing circuit operative to generate sound signals based upon the states of the dots in the signal pattern area read by the line sensor.
3 more elements
An apparatus for reproducing digitally recorded sound signals, comprising:
- a motion picture film having an optically-readable digital sound track formed thereon, the motion picture film having a direction of travel, the motion picture film comprising an elongate, flexible substrate, the substrate having opposed edges and having a line of sprocket holes formed therein adjacent to each of the edges, an elongate digital pattern recording area on the substrate in the vicinity of one of the lines of sprocket holes, the digital pattern recording area having plural dots formed therein in a rectangular array of tracks substantially perpendicular to the direction of travel of the motion picture film, and columns in the direction of travel, each of the dots being in one of a first state and a second state optically distinct from one another, the digital pattern recording area being divided along the tracks into a first tracking pattern area and a second tracking pattern area, the dots in each track of the first tracking pattern area include a string of first dots adjacent to a string of second dots, the first dots being in a different state from the second dots and the first dots in consecutive tracks being in opposite states to form a vertical synchronizing pattern, and a signal pattern area disposed between the first tracking pattern area and the second tracking pattern area, the states of the dots in the signal pattern area representing a digital sound signal of at least one channel;
- a line sensor aligned perpendicular to the direction of travel of the motion picture film, the line sensor operative to read the digital pattern recording area;
- a timing circuit operative to generate a timing signal based upon the vertical synchronizing pattern read by the line sensor;
- a tracking servo circuit responsive to the timing signal, the tracking servo circuit operative to generate scanning timing signals for controlling reading by the line sensor;
- and
- a sound signal reproducing circuit operative to generate sound signals based upon the states of the dots in the signal pattern area read by the line sensor.
3 more elements
An apparatus for reproducing digitally recorded sound signals, comprising:
- a motion picture film having an optically-readable digital sound track formed thereon, the motion picture film having a direction of travel, the motion picture film comprising an elongate, flexible substrate, the substrate having opposed edges and having a line of sprocket holes formed therein adjacent to each of the edges, an elongate digital pattern recording area on the substrate in the vicinity of one of the lines of sprocket holes, the digital pattern recording area having plural dots formed therein, each of the dots being in one of a first state and a second state optically distinct from one another, the digital pattern recording area including an elongate first tracking pattern area and an elongate second tracking pattern area, the dots in the tracking pattern areas being arranged in a rectangular array of tracks substantially perpendicular to the direction of travel of the motion picture film, and columns in the direction of travel, the dots in the first tracking pattern area being arranged to form a vertical synchronizing pattern, the vertical synchronizing pattern including a string of first dots adjacent to a string of second dots in each track of the first tracking pattern area, the first dots being in a different state from the second dots, and the first dots in consecutive tracks being in opposite states, and an elongate signal pattern area between the first tracking pattern area and the second tracking pattern area, the dots in the signal pattern area being arranged in a rectangular array of tracks substantially perpendicular to the direction of travel of the motion picture film, and columns in the direction of travel, the tracks of the signal pattern area being offset relative to the tracks of the first tracking area by a pre-set amount in the direction of travel, the states of the dots in the signal pattern area representing a digital sound signal of at least one channel;
- a line sensor aligned perpendicular to the direction of travel of the motion picture film, the line sensor operative to read the digital pattern recording area;
- a timing circuit operative to generate a timing signal based upon the vertical synchronizing pattern read by the line sensor;
- a tracking servo circuit responsive to the timing signal, the tracking servo circuit operative to generate scanning timing signals for controlling reading by the line sensor;
- and
- a sound signal reproducing circuit operative to generate sound signals based upon the states of the dots in the signal pattern area read by the line sensor.
3 more elements
Dependencies are inferred from the claim text.