Two-layer optical disk
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakashi Ishida, Mamoru Shoji, Shunji Ohara, Shinichi Konishi, Yoshito Aoki, Yoshiyuki Miyabata, Yuji Hisakado, Hironori Deguchi
Life of this patent
Estimating the term…
Abstract
A two-layer optical disk has a first layer of a disk shaped recording medium for storing data and a second layer of a disk shaped recording medium placed over the first layer for storing data. Data blocks A, B, C are stored in the first layer in said order. Similarly, data blocks X, Y, Z are stored in the second layer in said order. When reading the data from the two-layer optical disk, the data blocks are read in the order of A, X, B, Y, C, Z.
Claims15
A two-layer optical disk, comprising:
- a first layer of a disk-shaped recording medium for storing data;
- a second layer of a disk-shaped recording medium, positioned over said first layer, for storing data;
- a plurality of data blocks stored in said first layer;
- and
- a plurality of data blocks stored in said second layer, said data blocks in said first layer and in said second layer being alternately linked to present one stream of information, odd data blocks being stored in one of said first layer and said second layer, and even data blocks being stored in an other of said first layer and said second layer, wherein a seek distance is less than a radius of a total recording area of said optical disk.
A method for reproducing a two-layer optical disk having a first layer of a disk-shaped recording medium for storing data, a second layer of a disk-shaped recording medium for storing data, the second layer positioned over the first layer, a plurality of data blocks stored in the first layer, and a plurality of data blocks stored in the second layer, the method comprising:
- (a) reading one block from said first layer;
- (b) reading one block from said second layer;
- (c) reading another block from said first layer;
- and
- (d) reading another block from said second layer, the plurality of data blocks being arranged in the first layer and in the second layer such that odd data blocks are stored in one of the first layer and the second layer, and even data blocks are stored in an other of the first layer and the second layer, so that a seek distance is less than a radius of a total recording area of the optical disk.
Dependencies are inferred from the claim text.