(n-1) -bit information word into an n-bit channel word, and an encoding apparatus and method for decoding a channel word into an information word. bit information words into n-bit channel words and decoding arrangements and methods for decoding the channel words into information words)

摘要

An encoding apparatus for encoding an (n-1) -bit information word into an n-bit channel word to achieve a channel signal of a concatenated channel word is described. The channel signal is a bit sequence in which most k " 0 " s occur between " 1 " s. The encoding apparatus comprises input means (1) for receiving (n-1) -bit information weights, conversion means (2, 4, 5, 7, S ₁ to S ₉ ) and an output means (P) for supplying channel signals of the n-bit channel words. The converting means comprises insertion means (7.9, S ₅ ) for inserting one bit of the first or second binary value between the specific first and second neighboring bit positions (2.8, 2.9) in the (n-1) 0 " bits are inserted between the first and second neighboring positions of the information word, or the number of leading " 0 " s at the beginning of the information word exceeds a certain first integer (p-1). The conversion means sets the logical value of the specified third bit position (7.1) to a value of " 1 " when the number of leading " 0 " exceeds the specified first number, (S ₁ , S ₉ ) for setting a logical value of a specific fourth bit position (7.17) to a value of " 1 " when the number of bits of the information word exceeds a predetermined number (P) of the bit position, and the specific fourth bit position is one of a specific fourth number (q) of the trailing bit positions of the information word. The specific first and second numbers have a relationship with k. A corresponding decoding device is also described.