Address generating and detecting method and reproducing and recording apparatus
View Patent ↗Recording capacity per layer is detected from a disc and bit allocation of wobble addresses in a conventional optical disc and bit allocation in a high-density optical disc are controlled selectively to detect physical position addresses on the disc. Address detection can be performed for two kinds of discs which are equal in structure of addresses embedded in wobbles but different in bit allocation of addresses.
1. An address generating method for a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, the addresses including layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters, the method comprising the steps of:
generating the addresses based on either of a first bit allocation and a second bit allocation;
forming the first bit allocation from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number);
arranging the first bit allocation to an address bit of (h+i+j) bits on the recording medium; and
forming the second bit allocation from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, the second bit allocation having a virtual bit which is not recorded in the recording medium,
wherein the virtual bit indicates whether a regularity of lower two bits is a repetition of an increment, are used as extended bits of the cluster number addresses, and are arranged to an address bit of (h+i+j) bits on the recording medium by virtually embedding the virtual bit.
2. An address generating method for a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, the addresses including layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters, the method comprising the steps of:
generating the addresses based on either of a first bit allocation and a second bit allocation;
forming the first bit allocation from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number);
arranging the first bit allocation to an address bit of (h+i+j) bits on the recording medium; and
forming the second bit allocation from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, wherein:
the layer number address is arranged to an address bit of h bits, and
a part of bits of the cluster number address and the count value is arranged to an address bit of (i+j) bits.
3. An address detecting method for a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, the addresses including layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters, the method comprising the steps of:
forming a first bit allocation from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number);
arranging the first bit allocation to an address bit of (h+i+j) bits on the recording medium;
forming a second bit allocation from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, the second bit allocation having a virtual bit which is not recorded in the recording medium, wherein:
the virtual bits indicates whether a regularity of lower two bits is a repetition of an increment, are used as extended bits of the cluster number addresses, and are arranged to an address bit of (h+i+j) bits on the recording medium by virtually embedding the virtual bit; and
each address is detected based on either of the first bit allocation and the second bit allocation selected in accordance with bit allocation identification information stored in the recording medium.
4. An address detecting method for a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, the addresses including layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters, the method comprising the steps of:
forming a first bit allocation from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number);
arranging the first bit allocation to an address bit of (h+i+j) bits on the recording medium;
forming a second bit allocation from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, wherein:
the layer number address is arranged to an address bit of h bits;
a part of bits of the cluster number address and the count value is arranged to an address bit of (i+j) bits; and
each address is detected based on either of the first bit allocation and the second bit allocation selected in accordance with bit allocation identification information stored in the recording medium.
5. A reproducing apparatus for reproducing data from a recording medium, having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, wherein:
the addresses include layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters;
a first bit allocation is formed from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number), and the first bit allocation is arranged to an address bit of (h+i+j) bits on the recording medium;
a second bit allocation is formed from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, and the second bit allocation has a virtual bit which is not recorded in the recording medium;
the virtual bit indicates whether a regularity of lower two bits is a repetition of an increment, are used as extended bits of the cluster number addresses, and are arranged to an address bit of (h+i+j) bits on the recording medium by virtually embedding the virtual bit; and
data is reproduced from each address detected based on either a detection result of a first address reproducing unit and that of a second address reproducing unit selected in accordance with bit allocation identification information stored in the recording medium.
6. A reproducing apparatus for reproducing data from a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, wherein:
the addresses include layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters;
a first bit allocation is formed from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number), and the first bit allocation is arranged to an address bit of (h+i+j) bits on the recording medium;
a second bit allocation is formed from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits;
the layer number address is arranged to an address bit of h bits and a part of bits of the cluster number address and the count value is arranged to an address bit of (i+j) bits; and
data is reproduced from each address detected based on either a detection result of the first address reproducing unit and that of the second address reproducing unit selected in accordance with bit allocation identification information stored in the recording medium.
7. A recording apparatus for recording data on a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, wherein:
the addresses include layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters;
a first bit allocation is formed from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number), and the first bit allocation is arranged to an address bit of (h+i+j)bits on the recording medium;
a second bit allocation is formed from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits, and the second bit allocation has a virtual bit which is not recorded in the recording medium;
the virtual bit indicates whether a regularity of lower two bits is a repetition of an increment, are used as extended bits of the cluster number addresses, and are arranged to an address bit of (h+i+j) bits on the recording medium by virtually embedding the virtual bit; and
data is recorded on each address detected based on either detection result of a first address reproducing unit and a second address reproducing unit selected in accordance with bit allocation identification information stored in the recording medium.
8. A recording apparatus for recording data on a recording medium having an area for recording data regarding structure of recording layers and clusters, and addresses indicating physical recording positions on the recording medium, wherein:
the addresses include layer number addresses indicating numbers of the recording layers, cluster number addresses indicating data positions of the clusters, and in-cluster count values for counting inside of each of the clusters;
a first bit allocation is formed from a layer number address of h bits (h: natural number), a cluster number address of i bits (i: natural number) and a count value of j bits (j: natural number), and the first bit allocation is arranged to an address bit of (h+i+j) bits on the recording medium;
a second bit allocation is formed from a layer number address of h bits, a cluster number address of (i+k) bits (k: natural number) and a count value of j bits;
the layer number address is arranged to an address bit of h bits and a part of bits of the cluster number address and the count value is arranged to an address bit of (i+j) bits; and
data is recorded on each address detected based on either detection result of the first address reproducing unit and the second address reproducing unit selected in accordance with bit allocation identification information stored in the recording medium.