Device for controlling data storage and/or data reconstruction and method thereof

A data storage controlling method using a computer comprising:

• a step of dividing target data made by a set of elements, each element being expressed in multiple values, into groups of partial data made by a set of elements, each element being expressed in two values;
• a step of reserving a storage area smaller than a size of the target data and common to the partial data;
• a step of reversibly compressing the partial data and dividing the compressed data into a predetermined size of blocks, thereby generating compressed data blocks;
• a step of assigning an identifier for identifying the partial data from which a compressed data block is generated to each compressed data block;
• and
• a step of storing the generated compressed data block in the storage area,
• wherein each of the elements of the target data is expressed in multiple values by a plurality of bits that correspond to the partial data, respectively,
• each of the partial data is made by the bits,
• the data dividing section divides each element of the target data into the plurality of bits in a bit depth direction of the multiple values, and
• all of the bits of each partial data are the same in the bit depth direction.

A data storage controlling device comprising:

• a data dividing section for dividing target data made by a set of elements, each element being expressed in two values, into partial data made by a subset of the elements;
• a compression section for generating compressed data blocks by means of reversibly compressing the partial data and of dividing the compressed data into a predetermined size of blocks;
• an identifier assigning section for assigning an identifier for identifying the partial data from which the compressed data block is generated to each compressed data block;
• and
• a storage processing section for reserving a storage area that is smaller than a size of the target data and is common to the partial data and storing the generated compressed data blocks in the storage area ,
• wherein each of the elements of the target data is expressed in multiple values by a plurality of bits that correspond to the partial data, respectively, each of the partial data is made by the bits,
• the data dividing section divides each element of the target data into the plurality of bits in a bit depth direction of the multiple values, and
• all the bits of each partial data are the same in the bit depth direction.

A data storage controlling method using a computer comprising:

• a step of dividing target data made by a set of elements, each element being expressed in two values, into partial data made by a subset of the elements;
• a step of reserving a storage area smaller than a size of the target data and common to the partial data;
• a step of reversibly compressing the partial data and dividing the compressed data into a predetermined size of blocks, thereby generating compressed data blocks;
• a step of assigning an identifier for identifying the partial data from which the compressed data block is generated to each compressed data block;
• and
• a step of storing the generated compressed data block in the storage area,
• wherein each of the elements of the target data is expressed in multiple values by a plurality of bits that correspond to the partial data, respectively,
• each of the partial data is made by the bits,
• the data dividing section divides each element of the target data into the plurality of bits in a bit depth direction of the multiple values, and
• all of the bits of each partial data are the same in the bit depth direction.