| 摘要 |
<p>PURPOSE:To suppress the DC component of a transmission data without increasing the redundancy with simple constitution by inverting a prescribed bit of a sample data. CONSTITUTION:The 2nd and 4th bits of the inputted 4-bit data counted from the MSB are inverted respectively by inverters 25,26, the results are subject to P/S conversion 3 by using a clock to obtain an NRZ modulation. As a result, the CDS to data near the zero level is frequently '0', and when the frequency of generation near the zero level of the input data is high, the CD suppression effect is improved and when the data sampling the audio signal is an input data, no redundancy is given and the DC suppression is attained.</p> |
