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Epson America headquarters in Los Alamitos, California. Seiko Epson Corporation, commonly known as Epson, [3] is a Japanese multinational electronics company and one of the world's largest manufacturers of printers and information- and imaging-related equipment.
1.5.7 MeSH E01.370.378 – diagnostic techniques, obstetrical and gynecological 1.5.8 MeSH E01.370.380 – diagnostic techniques, ophthalmological 1.5.9 MeSH E01.370.382 – diagnostic techniques, otological
Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.
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The first element of a CIRC decoder is a relatively weak inner (32,28) Reed–Solomon code, shortened from a (255,251) code with 8-bit symbols. This code can correct up to 2 byte errors per 32-byte block. More importantly, it flags as erasures any uncorrectable blocks, i.e., blocks with more than 2 byte errors.
Type I and type II errors. In statistical hypothesis testing, a type I error, or a false positive, is the rejection of the null hypothesis when it is actually true. For example, an innocent person may be convicted. A type II error, or a false negative, is the failure to reject a null hypothesis that is actually false.
Error-correcting codes are used in lower-layer communication such as cellular network, high-speed fiber-optic communication and Wi-Fi, as well as for reliable storage in media such as flash memory, hard disk and RAM. Error-correcting codes are usually distinguished between convolutional codes and block codes: