ENCODING DEVICE AND ENCODING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a voice encoding device for accurately encoding the shape of a spectrum of a signal with high tonality such as a vowel.

SOLUTION: A subband composition part 151 divides a first layer error conversion coefficient to be encoded into M subbands to generate M subband conversion coefficients. A shape vector encoding part 152 encodes each of the M subband conversion coefficients to obtain M pieces of shape encoding information, and calculates each target gain of the M subband conversion coefficients. A gain vector composition part 153 composes one gain vector by using M target gains. A gain vector encoding part 154 obtains gain encoding information by encoding the gain vector. A multiplexing part 155 multiplexes shape encoding information with gain encoding information.

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