APPARATUS FOR ENCODING AND APPARATUS FOR DECODING SPEECH AND MUSICAL SIGNALS

A speech and musical signal codec employing a band splitting technique encodes sound source signals of each of a plurality of bands using a small number of bits. The codec includes a second pulse position generating circuit, to which an index output by a minimizing circuit and a first pulse position vector P−=(P1, P2, . . . , PM) are input, for revising the first pulse position vector using a pulse position revision quantity d−i=(di1, di2, . . . , diM) specified by the index and outputting the revised vector to a second sound source generating circuit as a second pulse position vector P−t=(P1+di1, P2+di2, . . . , PM+diM).