Recording medium, reproduction and recording method, reproduction and recording device
View Patent ↗Obtain an expanded address without altering the bit number of an address which is embedded in a wobble. Generate a virtual bit which is not recorded on a disc, and which is expressed by the disparity from the rules and the presence or absence of information embedded in part or all of the wobble address.
1. In an recording medium provided with a plurality of recording layers having areas where a plurality of clusters for recording data are recorded, the recording medium comprising:
an address, which is recorded by being wobbling-superimposed on a track on which data is recorded in synchronization with the cluster, and configured to indicate information including identification of clusters and an intra-cluster position, wherein the address is configured to indicate physical recording position on the recording medium, and includes: a layer number address indicating numbers of the plurality of recording layers, a cluster number address indicating data positions of the plurality of clusters, and an intra-cluster count value for specifying a physical position of the cluster;
a data structure, including twelve (12) bits of data including disc information, and being configured by dividing a block to which a first error correction code is added into a plurality of parts, and the address;
a code string, generated by adding a second error correction code to the data structure, and recorded on the recording medium with the code string modulated;
a virtual bit, configured to indicate whether or not the regularity of low-order 2 bits of the address is switched, and used as an expansion bit of the cluster number address, and is not recorded on the recording medium is virtually imbedded in the address, and whether or not the regularity of low-order 2 bits is a repetition of increments.
2. A recording method of recording data on the recording medium defined in claim 1 , the recording method comprising:
reading the recorded address from the recording medium;
restoring the virtual bit which is virtually embedded in the address;
detecting the address on the basis of the restored virtual bit; and
recording data on the recording medium with the detected address.
3. A recording device for recording data on the recording medium defined in claim 1 , the recording device comprising:
a pick-up, configured to read the recorded address from the recording medium;
an address reproduction circuit, configured to restore the virtual bit which is virtually embedded in the address and configured to detect the address on the basis of the restored virtual bit; and
a data recording circuit, configured to record data on the recording medium with the detected address.
4. A reproduction method of reproducing data from the recording medium defined in claim 1 , the reproduction method comprising:
reading the recorded address from the recording medium;
restoring the virtual bit which is virtually embedded in the address;
detecting the address on the basis of the restored virtual bit; and
reproducing data from the recording medium with the detected address.
5. A reproduction device for reproducing data from the recording medium defined in claim 1 , the reproducing device comprising:
a pick-up, configured to read the recorded address from the recording medium;
an address reproduction circuit, configured to restore the virtual bit which is virtually embedded in the address, and configured to detect the address on the basis of the restored virtual bit; and
a data reproduction circuit, configured to reproduce data from the recording medium with the detected address.
6. An address recording method in a recording medium provided with a plurality of recording layers having areas where a plurality of clusters for recording data are recorded, the address recording method comprising:
an address, configured to indicate information including identification of clusters and an intra-cluster position is recorded by wobbling-superimposing it on a track on which data is recorded in synchronization with the cluster, wherein the address is an address configured to indicate a physical recording position on the recording medium and includes: a layer number address indicating numbers of the plurality of recording layers, a cluster number address indicating data positions of the plurality of clusters, and an intra-cluster count value for specifying a physical position of the cluster;
a virtual bit, configured to indicate whether or not the regularity of low-order 2 bits of the address is switched, and used as an expansion bit of the cluster number address, and is not recorded on the recording medium is virtually imbedded in the address, and whether or not the regularity of low-order 2 bits is repetition of increments.