Abstract:
It is an object of the present invention to provide an information input/output method that is capable of imparting different functions to dots of a dot pattern displayed on a printed matter, thereby, at the time of providing information from the dot pattern, recognizing directivity and speedily providing information and that is capable of checking an error relative to a dot layout state, and further, that is capable of enhancing security. Therefore, according to the present invention, the information input/output method is provided, and includes: defining as a block a rectangular area of a square or a rectangle, of a medium face such as a printed matter; while a straight line in a vertical direction and a horizontal direction configuring a frame of the block is defined as a standard grid line, providing a virtual reference grid point by predetermined interval on the reference grid line; laying out a reference grid point dot on a virtual reference grid point; connecting the virtual reference grid points to each other and defining a straight line parallel to the reference grid line as a grid line; defining a cross point between the grid lines as a virtual grid point; generating a dot pattern obtained by laying out one or a plurality of information dots, respectively, having a distance and a direction around the virtual grid point; reading such dot pattern as image information by optical reader means; numerically valuing the dot pattern; and reading and outputting information that corresponds to the numerically valued information from storage means.
Abstract:
According to one embodiment, an error correction parity bit sequence is generated for a data sequence obtained by adding a dummy symbol of a specific pattern to a digital information sequence modulated to convert into a form satisfying the request of a reproducing system. If the parity bit sequence meets the request of the reproducing system, the modulated digital information sequence excluding the dummy symbol and the parity bit sequence are output in such a manner that the information sequence and parity bit sequence correspond to each other. If the parity bit sequence does not meet the request of the reproducing system, a dummy symbol of another pattern is added to the modulated digital information sequence, thereby generating an error correction parity bit sequence.
Abstract:
In one embodiment, bit processing units are provided for the 1st to Mth rows (M=p1×m1) of a parity-check matrix that includes a first parity-check matrix and second parity-check matrix adjacent thereto. The first and second parity-check matrices include (n1×m1) and (n2×m2) permuted matrices, respectively. The bit processing units sequentially update bit information corresponding to column positions included in the respective rows of the first and second parity-check matrices, a bit at each of the column positions being set to “1”. Parity processing units update parity information corresponding to row positions in p1 columns of each of the n1 column blocks of the first parity-check matrix, and corresponding to row positions in p2 columns of each of the n2 column blocks of the second parity-check matrix, a bit at each of the row positions being set to “1”.
Abstract:
When received data is decoded, a CPU stores a value “1”, which is included in a vector obtained by multiplying the received data by a parity check matrix, as the number of parity errors and also stores hard-decision result information corresponding to the number of parity errors in an output candidate information storage area. If the CPU determines that the received data is uncorrectable after the received data is decoded a given number of times, it reads hard-decision result information corresponding to the smallest number of parity errors, which are included in the number of parity errors stored in the output candidate information storage area and outputs it as a decoding result.
Abstract:
According to one embodiment, a run length limiting apparatus comprises an input section configured to input, a digital data string including a predetermined number of symbols which have the same number of bits, a search section configured to search for a specific symbol having a pattern that does not match any of the symbols included in the input digital data string, a calculation section configured to perform an exclusive OR operation between the specific symbol searched for and each of the symbols included in the input digital data string, and an output section configured to output the calculated digital data string together with the specific symbol.
Abstract:
A holding apparatus for holding an optical element includes a measuring part configured to measure a coordinate of the optical element, and a driving part configured to move the optical element based on the coordinate measured by the measuring part, wherein the measuring part includes a first sensor configured to detect a displacement amount of a part of the optical element, and a second sensor configured to detect that a part of the optical element is located at a predetermined position.
Abstract:
A method and system for particle beam lithography, such as electron beam (EB) lithography, is disclosed. The method and system include selecting one of a plurality of cell patterns from a stencil mask and partially exposing the cell pattern to a particle beam, such as an electron beam, so as to selectively project a portion of the cell pattern on a substrate.
Abstract:
There is provided an apparatus which obtains a circumstance where LDPC codes are interleaved without damaging modulation rules and thereby a correction ability of LDPC encoding and decoding method is fully exhibited. The apparatus includes an RLL rule applying section which modulates user data by applying an RLL rule to the user data and thereby obtains RLL encoded sequence data, an interleave section which interleaves the RLL encoded sequence data and thereby obtains interleaved sequence data, an LDPC parity generating section which subjects the interleaved sequence data to LDPC encoding processing and thereby obtains LDPC parity sequence data, an inserting section which inserts parity of the LDPC parity sequence data in the RLL encoded sequence data in a distribution manner and thereby obtains output data, and an output section which records or transmits the output data.
Abstract:
Commands are provided for storing data in a plurality of different types of storage media, thereby eliminating the storage errors of important data and improving usability. A storage device comprises a host interface, a hard disk interface acting as an interface to a hard disk, a flash memory interface acting as an interface to a flash memory, a command analyzing section which analyzes the contents of a command inputted from the host interface, and a data write operation processing section which performs a data write operation on both of the hard disk and the flash memory when the command analyzed in the command analyzing section is a predetermined command for write-through acting as a command for writing data into a plurality of media.
Abstract:
A data process can be performed without lowering the data processing efficiency even when the sector length of the host device side is different from the sector length of the hard disk side. Partial data or whole data of a second data block which is based on a long sector defined on the hard disk side and surrounds the starting end and terminating end addresses of a first data block based on a host-defined sector is read from the hard disk and written to a flash memory before the data process using the flash memory as a cache is performed based on the command.