Method and apparatus for recording and reproducing...

Method and apparatus for recording digital data by forming...

Method and apparatus of modulating/demodulating data for an...

Method and device for recording information in units

Method and system for computing digital sum variation of a...

Method for generating a binary signal having a predetermined...

Method for indicating a sector on a data medium and data...

Method for recording asynchronously produced digital data...

Method of converting bits of optical disk, demodulating...

Method of detecting data structure of non-return-to-zero...

Method of generating an efficient sequence of multi-level...

Method of registering a running time on an information...

Method of registering a running time on an information...

Method of registering a running time on an information...

Modulation device, modulation method and recording medium

Multi-level data processing method and apparatus

Multi-level information reproducing method

Multi-valued data elements for computer systems

Multilevel record modulator and demodulator