| 摘要 |
PROBLEM TO BE SOLVED: To accurately specify a band having large errors from the whole band with small computational complexity. SOLUTION: A first position specifying part 201 searches the band having the large errors in relatively wide band width and generates first position information indicating a specified band over the whole band of an input signal by using a first layer error conversion coefficient indicating the errors of a decoding signal to the input signal. A second position specifying part 202 searches a target frequency band having the large errors in relatively narrow band width in the band specified in the first position specifying part 201, and generates second position information indicating a specified target frequency band. An encoding part 203 generates encoding information by encoding a first layer decoding error conversion coefficient included in the target frequency band. The first position information, the second position information and the encoding information are transmitted to a communication partner. COPYRIGHT: (C)2009,JPO&INPIT |
