| 摘要 |
PROBLEM TO BE SOLVED: To encode data so as to improve encoding efficiency, and to decode the encoded data. SOLUTION: A flag generating section 30, generates a flag representing whether making the MDCT coefficient of corresponding frequency an encoding object or not for each frequency, and generates a first flag series by connecting the generated flags in order of frequencies. A flag rotation part 31 generates a second flag series having series of "0" at the end of the flag series by rotating the first flag series. An entropy encoding part 32 encodes data for restoring the first flag series from the MDCT coefficient of the encoding object and the second flag series, and also encodes the second flag series using a sign representing all of remaining sings are "0". COPYRIGHT: (C)2009,JPO&INPIT
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