Reproducing apparatus reproducing data from a recording medium having a preformatted address area at a starting position of each sector

A reproducing apparatus of a recording medium having an address area preformatted at a starting position of each of a plurality of sectors at which a VFO pattern and an address of the sector are recorded, said apparatus comprising:

• pattern detection means for detecting the VFO pattern in said starting position of each sector;
• and
• timing creation means for creating an address reading timing for a sector which follows a preceding sector whose VFO pattern point has been detected by said pattern detection means, based on a time point of detection of said VFO pattern of said preceding sector;
• said timing creation means creating an address reading timing for a sector which follows the sector whose address has been read, based on a time point when said address has been read, and also creating reproducing timings for a data area of the sector whose address has been read, based on a time point when said address has been read.

A reproducing apparatus of a recording medium having an address area performatted at a starting position of each of a plurality of sectors at which an address of the sector and a CRC code corresponding to said address are recorded, said apparatus comprising:

• discrimination means for checking an address read from said address area of said recording medium on the basis of said CRC code corresponding to said address to determine whether said address has correctly been read;
• and
• timing creation means for creating an address reading timing for a sector which follows the sector whose address has been read, based on a time point when said address has correctly been read;
• said timing creation means creating reproducing timings for a data area of the sector whose address has correctly been read, based on a time point when said address has correctly been read.

A reproducing apparatus for reproducing data from a disc medium having thereon a plurality of tracks each being divided into a plurality of sectors, each of said sectors having an identification (ID) area and a data area in which an address unique to said sector and user data are respectively recorded, said ID area of each sector being preformatted with a VFO pattern, which is used to generate a synchronization clock for recording to and reproducing from said sector, and a CRC code which is used to check the address of said sector whether said address has correctly been read, said apparatus comprising:

• reproducing means for reproducing data on a sector of said disc medium;
• CRC operation means for performing a CRC operation to an address recorded in the ID area of said sector which is contained in said data reproduced by said reproducing means;
• counting means for performing a counting operation according to a result of said CRC operation;
• and
• starting-position indication means for generating a reference signal which provides a reference of a starting position of a given sector when said CRC operation of a sector preceding said given sector has successfully resulted and said CRC operation of said given sector successfully results by a time at which a count of said counting means reaches a predetermined value.