PURPOSE: To provide an adaptive conversion encoding audio signal decoder error interpolating without sense of incongruity on acoustic feeling even when a bit error exists in an adaptive conversion encoding signal.
CONSTITUTION: This decoder is provided with an error detection means 101 detecting the error of the adaptive conversion encoding audio signal 110 added with the error detecting data at every block, an input signal storage means 102 having the capacity storing the adaptive conversion encoding audio signal of two blocks or above and storing the adaptive conversion encoding audio signal, a first address setting means 103 setting the read-out address and the write-in address of the input signal storage means, a decoding means 109 decoding the frequency area data from the adaptive conversion encoding audio signal, a repeat frequency removal means 107 making a data value of a specified position from the frequency area data only by a prescribed number zeroes and an inverse transformation means 108 inversely transforming the frequency area data to the time area data.
ISHIDA MASAYUKI
KURODA MASASHI
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