Recording defect substitution method for a disc-shaped recording medium, and a recording and reproducing apparatus for a dissc-shaped recording medium

A disc-shaped recording medium recording method for recording data in sector units to a disc-shaped recording medium (8) having a structure with a plurality of recording sectors, said disc-shaped recording medium recording method characterized by:

• error detection and correction coding data in both row and column directions, and segmenting said coded data into sector units;
• recording data coded in sector units to a sector in a first recording area (ADS) of the disc-shaped recording medium (8);
• determining (#400, #500) whether a sector is a defective sector by reproducing said sector;
• and
• recording data to be recorded to said defective sector to an alternate sector in a second recording area (ASS) provided on said disc-shaped recording medium (8) when said sector is determined to be a defective sector.

An apparatus for reproducing data from a disc-shaped recording medium (8) having a structure with a plurality of recording sectors characterized by

• a first recording area (ADS) comprising a data sector for recording data that is error detection and correction coded in both row and column directions, and segmented into sector units,
• a second recording area (ASS) comprising alternate recording sectors for alternately recording data recorded to a defective sector in the first recording area (ADS),
• a first address recording area (LiA, LoA) for recording sector addresses in the first area, and
• a second address recording area (PDL, SDL) for recording an alternate sector address corresponding to a defective sector;
• said disc-shaped recording medium reproducing apparatus characterized by comprising:
• means (31, #800) for detecting a recording data sector address from said first address recording area (LiA, LoA), and detecting an alternate sector address from said second address recording area (PDL, SDL);
• and
• reproduction control means (32, #1000) for controlling a data reader to sequentially access sectors based on the detected sector address and reproduce the recorded data.