| 摘要 |
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, ..., P M) are input, for revising the first pulse position vector using a pulse position revision quantity d- ; = (d i1 , d i2, ..., d iM) 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+d i1, P2+d i2, ..., P M+d iM).
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