Abstract: [Problem] How to record and play back data at a high line density. [Means for Solving the Problem] A DSV control bit determining/inserting unit 11 inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit 12. The modulation unit 12 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: A DSV control bit determining/inserting unit inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit. This modulation unit converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit. The conversion table used by the modulation unit includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit. In addition, the conversion table enforces a conversion rule, according to which the remaineder of division of the “1” count of an element in a data string by 2 having a value of 0 or 1 shall always be equal to the remainder of division of the “1” count of an element in the code resulting from conversion of the data string by 2.

Abstract: How to record and play back data at a high line density. A DSV control bit determining/inserting unit 11 inserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unit 12. The modulation unit 12 converts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unit 13. The conversion table used by the modulation unit 12 includes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit.

Abstract: The invention relates to a method of storing a disc-ID on a record carrier (1) comprising tracks (4) in which information can be stored. This disc-ID comprises a predetermined fixed number of disc-ID bits (10). The disc-ID bits (10) are stored on the record carrier (1) in a scattered way. For example, the disc-ID bits (10) can be stored in groups of one disc-ID bit (1) and at positions reserved for storing non-data bits. The invention further relates to a device for reading the record carrier (1) with the scattered disc-ID, and to a record carrier (1).

Abstract: A method is described for reproducing video frames coded in accordance with an MPEG format, in which method a carrier provided with recordings is played with a speed which differs from the nominal playback speed, and in which the number of frames to be transferred to a display apparatus and generated by reading out is compensated in such a manner that the average number per unit of time is equal to a predetermined nominal number by repeating or by skipping B frames.