| 摘要 |
<p>PURPOSE:To reproduce recorded data stably by containing the same information signal of a minimum encoded information unit more than twice in the minimum unit block of an encoded digital signal part. CONSTITUTION:Magnetic tape 1, having a single track, is provided with analog audio signal part 2, digital encoded signal part 3 and digital discrimination signal part 4 and digital modulation uses a tone burst and is done at cycles of frequency f1. The tone burst signal has a tone burst of f1 when output Le is generated after digital demodulation and a no-signal part when outputting Hi. In this constitution, depending upon dropout and level lowering, etc. of each bit of data, even if part of data, i.e., either of high-order or low-order four Bits is normal or not, either of bits a normal bit for every bit, so that accurate data can easily be composed. Therefore, recorded data is reproduced stably.</p> |
