To provide a voice encoding device for accurately encoding the spectral shape of a signal having a strong tonality, such as a vowel.
A sub-band constituting unit 151 divides a first layer error conversion coefficient to be encoded into M-pieces of sub-bands to generate M-pieces of sub-band conversion coefficients. A shape vector encoding unit 152 performs encoding on each of the M-pieces of sub-band conversion coefficients to obtain M-pieces of shape encoded information and calculates a target gain of each of the M-pieces of sub-band conversion coefficients. A gain vector forming unit 153 forms one gain vector by using M-pieces of target gains. A gain vector encoding unit 154 encodes the gain vector to obtain gain encoded information, and a multiplexing unit 155 multiplexes the shape encoded information with the gain encoded information.
MORII TOSHIYUKI
YAMANASHI TOMOHITO
| JP2004102186A | 2004-04-02 | |||
| JPH1130997A | 1999-02-02 | |||
| JPH03263100A | 1991-11-22 | |||
| JPH10282997A | 1998-10-23 |