“ Encoding Method And Apparatus, And Program”

Abstract: An encoding method for dividing a bit string of an input signal at a position of x bits from a least significant bit into a high-order bit string and a low-order bit string, performing variable-length-encoding of the high-order bit string, and performing fixed-length-encoding of the low-order bit string includes deriving a reference integer I close to 2X (x = m/2, m is an integer of 0 or more); obtaining a quotient and a remainder that are determined by performing a dividing operation on numerical values represented respectively by the bit strings by using the reference integer I; and performing variable-length-encoding of each of quotients of two consecutive bit strings, combining remainders corresponding to the quotients and performing fixed-length-encoding of the result, and generating a codeword.

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