MIL-HDBK-1300A
ct. Embedded FEC - For MIL-STD-2045-44500 (TAC02), FEC is an element of a hardware unit with more general functionality.
cu. Encoder - An embodiment of an encoding process.
cv. Encoding process - A process that takes as its input a continuous-tone image and outputs compressed image data.
cw. Entropy - The lower bound on the number of bits required to encode the output of a source (of information).
cx. Entropy-coded (data) segment - An independently decodable sequence of entropy encoded bytes of compressed image data.
cy. Entropy decoder - A device that processes an encoded data stream to extract the original symbols with no loss of information. The device may be implemented in hardware or software.
cz. Entropy encoding - A lossless procedure that converts a sequence of input symbols into a sequence of bits so that the average number of bits-per-symbol approaches the entropy of the input symbols.
da. Error-Correcting Code (ECC) - A code in which each telegraph or data signal conforms to specific rules of construction so that departures from this construction in the received signals can generally be automatically detected and corrected. If the number of errors is not greater than the maximum correctable threshold of the code, then all errors are corrected. Note 1: Such codes require more signal elements than are necessary to convey the basic information. Note 2: The two main classes of error-correction codes are block codes and convolutional codes.
db. Error Detection and Correction (EDAC) - The application of one or several methods for the detection and correction of errors in a bit stream. For the purpose of MIL-STD-2045-44500 (TAC02), the term EDAC generally is used synonymously with FEC, but is sometimes used to refer to error control systems that make use of a backward channel (for example, retransmission requests).
dc. Extended Binary Coded Decimal Interchange Code (EBCDIC) - An 8-bit alphanumeric coded character set. (Developed and used by International Business Machines (IBM) mainframe computers.)
dd. Extended (DCT-based) process - A descriptive term for DCT-based encoding and decoding processes in which additional capabilities are added to the baseline sequential process.
de. Facsimile - 1. A form of telegraphy for the transmission of fixed images, with or without half-tones, with a view to their reproduction in a permanent form. In this definition the term telegraphy has the same general meaning as defined in the Convention. (RR) 2. A system of telecommunication for the transmission of fixed images with a view to their reception in a permanent form. (JCSI-D0D) (JCSI-NAT0) 3. The process, or the result of the process, by which fixed graphic
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