FIELD: engineering of data carrier, and of recording and reading devices, compatible with such a data carrier.
SUBSTANCE: each variant of aforementioned data carrier contains recording track, formed by a stream of recesses on the surface of carrier, data of recess represent information recorded on it, which contains main data and sub-code. In accordance to one of variants, information about physical characteristics of current data carrier is recorded in sub-code. In accordance to other variant, data carrier contains multiple individual reading/recording zones, physical characteristics of which are different, and each one of aforementioned zones contains zones for input, zones for program and ones for output, while in sub-code of input zone of each one of aforementioned zones, information about physical characteristics of appropriate individual reading/recording is recorded as well as information about starting position of input zone of next individual reading/recording zone. Each one of variants of recording device contains a certain device for determining physical characteristics of aforementioned data carrier by reading information about these from sub-code, and each variant of reading device contains aforementioned determining device and device for controlling reading.
EFFECT: increased quality of reading and writing of information.
6 cl, 94 dwg
