Patent ID: 7154835

Claim:
A digital signal processing method comprising the steps of: dividing input digital data signals every predetermined number of words to generate K data sectors each composed of M rows×N columns; dividing each data sector into two in a column direction to obtain first and latter K half data sectors each composed of M rows×N/2 columns; generating inner parity data based on each row data of the first and latter K half data sectors; generating outer parity data based on each column data of matrix data obtained by connecting the first and latter K half data sectors in the column direction; and outputting the first and latter K half data sectors, the inner parity data, and the outer parity data; wherein when a 1 st row of a first 1 st half data sector to a Mth row of a latter 1 st half sector are sequentially output in such a way that the 1 st row of the first 1 st half data sector, inner parity data with respect to the 1 st row of the first 1 st half data sector, the 1 st row of the latter 1 st half data sector, and inner parity data with respect to the 1 st row of the latter 1 st half data sector are sequentially output, and thus this output is repeated with respect to a 1 st data sector to a Kth data sector, one of each row of a first half outer parity data and each row of a latter half outer parity data generated on the basis of the K data sectors is alternately output for each data sector output.