Data decoding apparatus and method and recording medium

Details Data decoding apparatus and method and recording medium Data decoding apparatus and method and recording medium

1996-04-10

1998-05-26

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

Byte length changed

341 59, H03M 700

Patent

active

057572968

ABSTRACT:
Even if an element such as a ROM is not used, a code reverse conversion can be realized by a sufficiently small scale circuit to be effective for integration. When code data group converted from 8-bit to 15-bit according to a predetermined rule is converted to original 8-bit code data group, an exclusive logic processor 11, a bit shift processor 12, a six-to-four decoder and an eleven-to-eight decoder 14 divides the 15(m) bit code (dividing by m at the maximum) into a plurality of areas, converts "1" (in the case of positive logic) in response to the generated bit position in the respective areas, and the numeric codes obtained by the numeric value converting means are added by an adder 15.

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patent: 5486828 (1996-01-01), Mikami
patent: 5491479 (1996-02-01), Wilkinson
Tang, et al: "Block Codes for a Class of Constrained Noiseless Channels", Information and Control 17, 436-461 (1970) pp. 436 and 451.
Schouhamer Immink K A et al., "Optimization of low-frequency properties of eight-to-fourteen modulation", Radio and Electronic Engineer, Feb. 1983, vol. 53, No. 2, pp.63-66.

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