Method of and apparatus for reproducing a recording medium

A method of reproducing a recording medium, which has address data recorded thereon, a set of data discretely recorded in a plurality of small recording areas thereon, and information indicative of connective relationships between the small recording areas recorded thereon, said reproducing method comprising the step of:

• storing the information indicative of connective relationships between the small recording areas read by a read means into a memory;
• executing control in high-speed reproduction by means of a controller so that said read means repeatedly accesses in accordance with the information stored in said memory and reads the data stored in the small recording areas in units of a predetermined data amount;
• executing further control so that, when said read means has moved to a position outside a preceding small recording area after an access, said read means accesses a position in a subsequent small recording area in a connective relationship with the preceding small recording area, and, when the position in said subsequent small recording area reached after the access is within a predetermined range of the start address of said subsequent small recording area, said read means reads data starting at said position;
• judging whether the data length of a subsequent small recording area reached after an access is smaller than a predetermined data length;
• and
• causing, when the length is judged to be smaller than the predetermined length, said read means to access a next-subsequent small recording area in accordance with the information stored in said memory.

A method of reproducing a recording medium, which has address data recording thereon, data discretely recorded in a plurality of small recording areas of a data-recording area thereof, and information indicative of connective relationships between the small recording areas, with said data of the small recording areas being constituted of a plurality of sectors, each sector being formed of a plurality of segments, and one data unit thereof being formed of a pair of sectors, said reproducing method comprising the steps of:

• storing the information indicative of connective relationships between the small recording areas read by a read means into a memory;
• executing control in high-speed reproduction by means of a controller so that said read means repeatedly accesses in accordance with the information stored in said memory and reads the data stored in the small recording areas in units of a predetermined data amount, and executing further control so that, when said read means has moved to a position outside a preceding small recording area after an access, said read means accesses a subsequent small recording area in a connective relationship with the preceding small recording area, and, when the position in said subsequent small recording area reached after the access is within a predetermined distance from a start address of said subsequent small recording area, said read means reads data starting at said position;
• and
• executing further control so that when said position in said subsequent small recording area is greater than a predetermined distance from the start address of said subsequent small recording area, said read means successively accesses at least one of a plurality of new positions on the recording medium and, when one of the plurality of new positions comes within said predetermined distance from a start address of said subsequent small recording area, said read means reads data recorded in said subsequent small recording area starting at said new position.

A reproducing method of a recording medium, which has address data recorded thereon, data discretely recorded in a plurality of small recording areas of a data-recording area thereof, and information indicative of connective relationships between the small recording areas recorded thereon, said data of the small recording areas being constituted of a plurality of sectors, each sector being formed of a plurality of segments, and one data unit thereof being formed of a pair of sectors, said reproducing method comprising the steps of:

• storing the information indicative of connective relationships between the small recording areas read by a read means into a memory;
• executing control in high-speed reproduction by means of a controller so that said read means repeatedly accesses in accordance with the information stored in said memory and reads the data stored in the small recording areas in units of a predetermined data amount, and executing further control so that, when said read means has moved to a position outside a preceding small recording area after an access, said read means accesses a subsequent small recording area in a connective relationship with the preceding small recording area, and, when said position in said subsequent small recording area is at an address within a predetermined range of the start address of Said subsequent small recording area, said read means reads data starting at said position;
• causing, in the high-speed reproduction, said read means to again access when the number of errors in the data read by said read means is over a predetermined number, and to reproduce data using segments other than a segment connecting both of said sectors in a pair.

A reproducing method of a recording medium, which has address data recorded thereon, data discretely recorded in a plurality of small recording areas of a data-recording area thereof, and information indicative of connective relationships between the small recording areas, said data being constituted of a plurality of sectors, each sector being formed of a plurality of segments, and one data unit thereof being formed of a pair of sectors, said reproducing method comprising the steps of:

• storing the information indicative of connective relationships between the small recording areas read by read means into a memory;
• executing control in high-speed reproduction by means of a controller so that said read means repeatedly accesses in accordance with the information stored in said memory and reads the data stored in the small recording areas in units of a predetermined data amount;
• and
• judging, by means of said controller, whether or not the data read by said read means is reproducible for each sector, and reproducing and outputting only the sectors judged to be reproducible.

A reproducing apparatus for a recording medium which has address data recorded thereon, a set of data discretely recorded in a plurality of small recording area thereon, and information indicative of connective relationships between the small recording areas recorded thereon, the reproducing apparatus comprising:

• read means for reading data recorded on the recording medium;
• a memory for storing the information indicative of connective relationships between the small recording areas read by the read means;
• and
• a controller for executing control in high-speed reproduction so that the read means repeatedly accesses a first small recording area in accordance with the information stored in the memory and reads the data stored in the first small recording area in units of a predetermined data amount and for further executing control so that, when the read means has moved to a position outside the first small recording area, the read means access a position in a second small recording area in a connective relationship with the first small recording area, and, when the position accessed in the second small recording area is off a start address of the second small recording area and within a predetermined range of the start address of the second small recording area, the read means repeatedly accesses the second small recording area and reads data in units of a predetermined amount starting at the position.