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US 4,399,465 AGranted
System for scanning of motion picture films to derive television signals
AssigneeRobert Bosch GmbH
InventorVolker Massmann
Life of this patent
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Abstract
To prevent cutting lines and overlap of frames upon reproduction of standard motion-picture film, in which the motion-picture film is scanned and the scanned signals are recorded in a store (16), the store is divided into storage blocks, each capable of storing 36 lines, addressing of the respective storage blocks such that two times seven or two times five storage blocks are utilized for storing of the frames, the sequence of the blocks with respect to the scanned lines changing from film frame to film frame, with the sequence repeating every four frames.
Claims10
System for scanning of film to derive standard television signals in which the film is scanned line-by-line without interlace, having
- a storage means (16) for storing signals connected to receive scanned signals derived from scanning of the film, line by line,
- recording address generating means (26a) for generating specified addresses for control of the storage means, and connected to the storage means, the scanned signals being stored in the storage means at specified addresses under control of the recording address generating means;
- reproduction address generating means (26b) for generating specified addresses for additional control of the storage means, and connected to the storage means, the stored signals being read-out from specified addresses under control of the reproductive address generating means in accordance with television (TV) transmission standards, including line and frame frequency;
- and wherein, upon scanning film of normal or Cinemascope format, and to derive signals for a 525 line/60 Hz interlace television standard, the storage means (16) comprises
- sixteen storage blocks (A-H;
- a-h) divided into two groups of eight blocks each, each block being capable of storing thirty-six lines of scanned signals corresponding to thirty-six lines;
- the recording address generating means controlling storage of the scanned signals in a predetermined sequence of an odd number of blocks of the two groups, and wherein the sequence, with respect to sequentially scanned sets of thirty-six lines, changes with succeeding film frames, the sequence repeating in cycles of four succeeding frames;
- and wherein the reproduction address generating means controls read-out of the stored signals for, alternatingly, reading-out the storage blocks of one group first, then the storage blocks of the other group, and, with respect to every other film frame, the storage blocks of the first group are read-out once more after read-out of the second block, whereby the first and third frames will have the first group of storage blocks read-out twice, and the second group of storage blocks read-out once between the double read-out of the first storage blocks.
5 more elements
Method of scanning a motion-picture film to derive standard television signals in which the film is scanned line-by-line without interlace, to derive scanned signals utilizing
- a storage means (16) for storing signals derived from scanning of the film, recording address generating means (26a) and generating specified addresses for control of the storage means connected to the storage means, the scanned signals being stored in the storage means at specified addresses under control of the recording address generating means, and reproduction address generating means (26b) and generating specified addresses for additional control of the storage means and connected to the storage means, the stored signals being read-out from specified addresses under control of the reproduction address generating means in accordance with television transmission standards, including line and frame frequency,
- and wherein, upon scanning film of normal format or Cinemascope format, to derive signals for a 525 line/60 Hz interlace television standard, the method comprises the steps of
- dividing the storage means into two groups (A-H;
- a-h), each having an odd number of storage blocks;
- storing the scanned signals of a frame in the blocks of the two groups, in which the storage sequence of the blocks, with respect to sequentially scanned sets of thirty-six lines changes with succeeding film frames, the sequence repeating in cycles of four film frames;
- reading-out, under control of the reproduction address generating means, said stored signals, alternatingly, by first reading-out the storage blocks of one group, then the storage blocks of the other group, and, with respect to every other frame, the storage blocks of the first group once more after read-out of the storage blocks of the second group, whereby the first and third frames have the first group of storage blocks read-out twice, with the second group of storage blocks read-out once between the double read-out of the first storage blocks.
3 more elements
Dependencies are inferred from the claim text.