| 摘要 |
<p>There is disclosed a modulating system (30) for converting data of a basic data length of m bits into a variable length code (d, k; m, n; r) of a basic code length of n bits, which comprises the steps of: judging a binding length i (i=1 SIMILAR r) of the basic data; uniformly converting data of mxi bits into a code of nxr bits by using a conversion table for converting data of mxr bits where the binding length i is the maximum binding length r, and including at least one conversion table where the binding length i is less than r; and taking out specific bits from the code of nxr bits thus obtained on the basis of the judged binding length i to output them as a modulation code. Further, there is also disclosed a demodulating system (40) for converting, in reverse direction, a variable length code (d, k; m, n; r) of a basic code length of n bits into data of a basic data length of m bits, comprising the steps of: judging a binding length i of the variable length code; uniformly converting, in reverse direction, a variable length code of nxi bits into data of mxr bits by a reverse conversion table for converting, in reverse direction, a variable length code of nxr bits where the binding length i is the maximum binding length r, and including at least one reverse conversion table where the binding length i is less than r; and taking out specific bits from data thus obtained on the basis of the judged binding length i to output it as reproduction data. <IMAGE></p> |
