| 摘要 |
Method for reading information from mechanical phonogram relates to creation of systems for representation of audio-information from carriers with mono-relief record. In the method of reading information from mechanical phonogram of rarity carriers of record one performs reading with method of contact of needle with groove, rate of rotation of record carrier at reading is decreased more than 10 times compared to nominal rate of record, with transformation to digital code of information on profile of micro-relief information track. At reading one uses sound receiver with spherical tip compatible with dimensions of groove, with optical sensitive element built on basis of Michelson interferometer with use of differential photometry. Method for reading information from mechanical phonogram placed on rarity carriers (phonographic Edison’s cylinders, plates with deep record) makes it possible to decrease a lot dynamical load on surface of information carrier and to provide high-quality reading of sound signal without damage, to take profile of sound track itself with following registration in digital form, this provides more accurate representation of around signal, top perform reading of information from damaged carriers at presence of mechanical damages like cracks, chips. |
