METHOD, APPARATUS, STORAGE MEDIUM, AND CODING SCHEME FOR DATA STORAGE USING AMPLITUDE MODULATION

摘要

A method and an apparatus for encoding data as a two-dimensional array of pixels, as well as a method and an apparatus for decoding such data are described. Data bits for encoding are received via an input. An encoder determines blocks of pixels corresponding to the received data bits from an alphabet of allowed blocks of pixels. Each allowed block of pixels represents two or more data bits. Values of the pixels within each block of pixels in said alphabet are selected from three or more allowed values and increase continuously from a lowest value of a first pixel to a highest value of a last pixel when considering the pixels along a spiral or represent a plane having an orientation and an inclination. The blocks of pixels determined for the data bits are combined into a two-dimensional array of pixels. For decoding a pixel analyzer determines properties of pixel values of each retrieved block of pixels. A property analyzer then determines data bits for each retrieved block of pixels from the determined properties.