Error correction code block format
View Patent ↗An error correction code (ECC) block for a data storage disk, includes an array of data that is 88 rows by 172 columns. Each row includes ten bytes of inner parity code and each column includes sixteen bytes of outer parity making the array 104 rows by 182 columns. The ECC block is divided into eight sectors, each sector having eleven rows of data and two associated rows of outer parity, for a total of thirteen rows per sector. The ECC block in accordance with the present invention is half the size of a conventional ECC block but has a higher ratio of parity bytes to data. Consequently, the ECC block of the present invention is particularly advantageous with small form factor disks and first-surface media, i.e., disks with the recording layer on the exterior of the disk or under a very thin transparent layer.
1. A first-surface optical disk for use with a laser beam, comprising:
an information layer, and
a transparent layer overlaying tie information layer, wherein the thickness of the transparent layer with respect to the wavelength of the read/write laser beam is such that dust particles on the surface of the transparent layer are not defocused when reading data from the information layer with the laser beam passing through the transparent layer, and wherein the information layer is organized into ECC blocks, each ECC block forming an array of 104 rows and 182 columns of bytes, each row including ten bytes of inner parity and each column including sixteen bytes of outer parity.
2. The first-surface optical disk of claim 1 , wherein said array includes row codewords being RS(182,172,11) and column codewords being RS(104,88,17).
3. The first-surface optical disk of claim 1 , wherein said array is divided into eight sectors, each sector having thirteen rows.
4. The first-surface optical disk of claim 3 , wherein each sector comprises eleven rows of data and two rows of outer parity, each row having ten bytes of inner parity.
5. The first-surface optical disk of claim 3 , wherein each sector comprises:
a four byte identification data (ID) field;
a two byte ID error detection code field;
a two byte system information field;
a 1880 byte user data field; and
a four byte error detection cede field.