| 摘要 |
<p>The invention relates to a method and an apparatus for decoding RLL modulated data using tables of reduced sizes whereby the data are recorded on an optical disk, specifically a digital video disk (DVD). Even if an element such as a ROM is not used, a code reverse conversion can be realized by a sufficiently small scale circuit to be effective for integration. When code data group converted from 8-bit to 15-bit according to a predetermined rule is converted to original 8-bit code data group, an exclusive logic processor 11, a bit shift processor 12, a six-to-four decoder and an eleven-to-eight decoder 14 divides the 15(m) bit code (dividing by m at the maximum) into a plurality of areas, converts "1" (in the case of positive logic) in response to the generated bit position in the respective areas, and the numeric codes obtained by the numeric value converting means are added by an adder 15. <IMAGE></p> |
