| 摘要 |
<p>PROBLEM TO BE SOLVED: To directly generate an I-NRZ code which is suitable to a pilot signal without using any buffer by imposing a 1st and a 2nd I-NRZI modulation by performing a pipeline process for necessary parallel bits by a 2T type preencoder. SOLUTION: Three groups of 8-parallel-bit words are converted by a P/P (parallel) converter 102 into 24-bit words and a signal insertion part 104 adds a single digital additional bit 0 to generate 25-bit words, which are supplied to 2T type preencoder 106. According to the supplied. words, an encoder 105 performs the pipeline process to directly impose the 1st and 2nd I-NRZ modulations wherein the even bits are left as they are and the odd bits are made complement without using any buffer, and two kinds of preferable I-NRZ code are recorded between tracks of a recorder 124 as palette signals through P/S converters 112 and 110, etc.</p> |
