Rudolf Roth

Methods of and information recording devices for recording and/or inhibiting recording of an information signal having copy bits with logic values which alternate in accordance with a pattern

Recording system for recording only those types of information which are specified by the record carrier

System for recording and reading information on a record carrier at a constant scanning speed independent of the bit rate of such information

Recording device, a record carrier having preformatted address codes and auxiliary codes providing control data for use by the recording device, and an information recording system including both the recording device and the record carrier

Record carriers containing a user's preferred order of reproduction of items of information included therein, and apparatus for use with and/or for creating such record carriers

Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying

Method for recording data signals on an inscribable record carrier and reading device for the record carrier

Method for recording information on a record carrier having a track which is transversely modulated in accordance with an auxiliary signal including address codes and auxiliary codes, and a method for producing the track

Method and apparatus for recording on a record carrier a table of contents identifying all the recorded data signals

Method and apparatus for successively recording two EFM-modulated signals enabling detection of boundary condition for transitioning between signals