(under subclass 244) Subject matter in which image data are encoded using a variable length code, such that the most common image data have the shortest codes.
(1) Note. This coding requires a statistical analysis of the frequency of occurrence for different image data. This analysis can be part of the compression routine, or can be predetermined based upon the type of data likely to be compressed.
SEE OR SEARCH CLASS
341, Coded Data Generation or Conversion,
65, and 67 for Huffman coding and variable length coding, respectively, in digital converters.
