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Phototypesetting system and method
| Details |
Inventors: Brown, Kenneth W.;
Assignee: Compugraphic Corporation (Wilmington, MA)
Primary Examiner: Smith; Jerry
Assistant Examiner:
Attorney, Agent or Firm: Kenway & Jenney
A method and system for use in phototypesetting. A type font character is scanned and character data representative of the font character is generated. The scan data is encoded in accordance with a first predetermined sequence of steps to have the form of an ordered succession of code words. The stored encoded font data is processed in conjunction with character selection control signals to specify a line-to-be-typeset. The selected character data is decoded in accordance with a second predetermined sequence of steps. The first (encoding) and second (decoding) sequences of steps are related so that the format of the stored encoded data is specifically ordered so that it may be utilized in the decoding process as that data is presented. The decoded selected character data is then converted to video signals for an output cathode ray tube. The decoding sequence may be performed to generate stroke signals for the output cathode ray tube (CRT) of a conventional phototypesetting system during the corresponding strokes in the raster pattern of that output CRT operation. The encoding sequence of steps is adapted so that the decoding sequence may be selectively modified to provide selective scaling of the reproduction of the selected characters. |
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DETAILED DESCRIPTION Briefly, the present invention is directed to a method and system for use in phototypesetting.
According to one aspect of the invention, a type font is scanned and character, or symbol, data representative of that image is generated.
The original font information which is scanned may be character cards or have some other conventional format.
The scan data is then encoded in accordance with a first predetermined sequence of steps.
The resultant encoded data may be temporarily stored in digital form on such a storage medium as a magnetic disc pack, for example.
According to this aspect of the invention, a library of disc packs, each containing a stored font data in relatively compact encoded form, may be established for a number of type fonts.
In some forms of the invention, encoded font data stored in the disc packs, or other media, may be encrypted prior to storage in the disc pack, or alternatively, that information may be extracted from the disc pack, encrypted, and then stored on some other medium, such as floppy disks.
In the latter forms of the invention, encryption produces a security aspect to the stored font information.
According to another aspect of the invention, the stored, encoded font data from the disc pack, or alternatively, from the floppy disks, or other storage medium, may be then processed by a decoding portion of the system in conjunction with character selection control signals specifying a line-to-be-typeset provided in a conventional manner.
Initially, the stored, encoded font data is read from the medium into a local decoder storage.
The selected character data is then decoded in accordance with a second predetermined sequence of steps.
The decoded selected character data is then converted to video signals for an output CRT.
In systems where the encoded font data is stored in encrypted form, a corresponding data decrypter is utilized at the font end of the decoding portion of the system.
The first (encoding) and second (decoding) sequences of steps are related so that the decoding sequence may be performed to generate stroke signals for the output CRT of a conventional phototypesetting system during the corresponding strokes in the raster pattern of that output CRT operation
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Graphic Cards 
