| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a high compression rate even for data to be processed in which various tone data appear at short periods and the same tone data appear at long periods.SOLUTION: A computer 1 decides a bit number forming a notation part in a variable run length number notation header on the basis of a run length number where the subject of run length compression is image data. Since the notation part of the variable run length number notation header is variable, the notation part is shortened when the run length number is small and the notation part is extended when the run length number is large. The data being processed is then stored on the basis of a storage method pertinent to the variable run length number notation header. The length of an enumeration number of data following the notation part of the run length number can be suppressed to provide a higher compression rate. The run length number describable in the notation part can be increased and the number of headers can be suppressed to provide a higher compression rate.</p> |
