RLE

run-length encoding
RLE

   A kind of {compression} {algorithm} which replaces sequences
   ("runs") of consecutive repeated characters (or other units of
   data) with a single character and the length of the run.  This
   can either be applied to all input characters, including runs
   of length one, or a special character can be used to introduce
   a run-length encoded group.  The longer and more frequent the
   runs are, the greater the compression that will be achieved.
   This technique is particularly useful for encoding black and
   white {images} where the data units would be single bit
   {pixels}.

   (1994-10-27)
    

RLE
       Run-Length Encoded