Data-recording apparatus
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorTomohisa Yoshimaru
Life of this patent
Estimating the term…
Abstract
A data recording apparatus has an optical scanner for optically scanning a document and for outputting an image signal corresponding to the document pattern, a modified Huffman coding circuit for compressing the image information output by the optical scanner for each scanning line, and a page buffer memory for storing the image signal compressed by the modified Huffman coding circuit as line image information items. The line image information items are read out from the page buffer memory in units of a fixed number of bits, and are divided into image data pieces of a fixed bit length. Dummy data is added to the terminal end image data which does not have the fixed bit length, thus forming a terminal end image data of the fixed bit length. Error correction data is set for each image data piece.
Claims9
A data recording apparatus, comprising:
- an optical scanner for optically scanning a document and for outputting an image signal corresponding to a pattern of the document;
- means for compressing the image signal from said optical scanner and for converting the image signal into a plurality of image information items each corresponding to at least one scanning line;
- means for dividing each of the image information items from said converting means into a plurality of image data pieces of a fixed bit length from an information item end which corresponds to one end of the scanning line;
- means for adding dummy data to the image data piece corresponding to the other end of the scanning line to form a terminal end image data piece of the fixed bit length;
- means for inserting error correction codes into the image data pieces and the terminal end image data piece;
- and
- means for recording the image data pieces and the error correction codes on a recording medium.
A data recording apparatus comprising:
- an optical scanner for optically scanning a document and for outputting an image signal corresponding to a pattern of the document;
- mens for forming a plurality of line image information items each composed of bit data and corresponding to a plurality of scanning lines by compressing the image signal from said optical scanner to decrease redundancy of the image signal;
- buffer memory means for storing the line image information items;
- dividing means for dividing each of the line image information items into image data pieces of a fixed bit length after reading out the respective line image information items from said buffer memory means in units of bits;
- means for forming a terminal image data piece of the fixed bit length by detecting a terminal end of the scanning line and adding dummy data to the bit data corresponding to the terminal end;
- means for forming one word by adding an error correction code to each of the image data pieces;
- and
- means for recording the word on a recording medium.
Dependencies are inferred from the claim text.