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US 5,517,484 AGranted
Optical disk and optical disk recording and reproducing apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYuji Takagi, Isao Satoh, Motoshi Ito, Yuji Hisakado
Life of this patent
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Abstract
A reproduction type optical disk having same sector structure as that of a recordable optical disk, can reproduce data even if a plurality of sectors are disabled from correction. The disk has data sectors for recording data, parity sectors obtained by a new error correction coding between a plurality of data sectors, wherein the error correction coding between the data sectors is performed by arranging a plurality of data sectors into a matrix and by coding them in directions of row and column doubly to make a product code.
Claims25
An optical disk, comprising:
- data sectors containing data, each data sector being error correction coded;
- first parity sectors containing first error correction coding information;
- and
- second parity sectors containing second error correction coding information, wherein for the optical disk,
- if the data sectors, the first parity sectors, and the second parity sectors are arranged in a matrix having rows and columns where data sectors and a first parity sector are elements of each of a plurality of rows, and data sectors and a second parity sector are elements of each of a plurality of columns,
- in each of the plurality of rows, the first error correction coding contained in the first parity sector of each of the plurality of rows would correspond to the data contained in the data sectors of that row, and
- in each of the plurality of columns, the second error correction coding contained in the second parity sector of each of the plurality of columns would correspond to the data contained in the data sectors of that column.
4 more elements
An optical disk, comprising:
- data sectors containing data;
- first parity sectors containing first error correction coding information;
- and
- second parity sectors containing second error correction coding information, wherein for the optical disk,
- if the data sectors, the first parity sectors, and the second parity sectors are arranged in a matrix having rows and columns where data sectors and a first parity sector are elements of each of a plurality of rows, and data sectors and a second parity sector are elements of each of a plurality of columns,
- in each of the plurality of rows, the first error correction coding contained in the first parity sector of each of the plurality of rows would correspond to the data contained in the data sectors of that row, and
- in each of the plurality of columns, the second error correction coding contained in the second parity sector of each of the plurality of columns would correspond to the data contained in the data sectors of that column,
- the data sectors and the parity sectors being located on the optical disk in an order that corresponds to the order of the data sectors and the parity sectors in the rows of the matrix, such that the sectors in a same column of the matrix are not aligned in a radial direction of the optical disk.
5 more elements
An optical disk, comprising:
- data sectors containing data;
- first parity sectors containing first error correction coding information;
- and
- second parity sectors containing second error correction coding information, wherein for the disk,
- if the data sectors, the first parity sectors, and the second parity sectors are arranged in a matrix having rows and columns where data sectors and a first parity sector are elements of each of a plurality of rows, and data sectors and a second parity sector are elements of each of a plurality of columns, such that when a number of rows of the matrix is m, a number of columns of the matrix is n, and a number of sectors recorded on one track of the optical disk is k, m and n are smaller than k,
- in each of the plurality of rows, the first error correction coding contained in the first parity sector of each of the plurality of rows would correspond to the data contained in the data sectors of that row, and
- in each of the plurality of columns, the second error correction coding contained in the second parity sector of each of the plurality of columns would correspond to the data contained in the data sectors of that column.
4 more elements
An optical disk, comprising:
- data sectors containing data;
- first parity sectors containing first error correction coding information;
- and
- second parity sectors containing second error correction coding information, wherein for the disk,
- if the data sectors, the first parity sectors, and the second parity sectors are arranged in a matrix having rows and columns where data sectors and a first parity sector are elements of each of a plurality of rows, and data sectors and a second parity sector are elements of each of a plurality of columns, such that, when a number of rows of the matrix is m, and a number of the sectors recorded on one track of the optical disk is k, m and k are prime to each other,
- in each of the plurality of rows, the first error correction coding contained in the first parity sector of each of the plurality of rows would correspond to the data contained in the data sectors of that row, and
- in each of the plurality of columns, the second error correction coding contained in the second parity sector of each of the plurality of columns would correspond to the data contained in the-data sectors of that column.
4 more elements
Dependencies are inferred from the claim text.