SOUND SIGNAL PROCESSING APPARATUS, SOUND ENCODING APPARATUS AND SOUND DECODING APPARATUS

摘要

Provided is a sound signal processing apparatus capable of performing a sound signal processing, such as time scaling or frequency modulation, with only a small calculation amount. A sound signal processing apparatus for converting an input sound signal sequence by use of a predetermined adjustment factor comprises: a filter bank (2601) that is operative to convert an input sound signal sequence to a QMF (Quadrature Mirror Filter) factor sequence by use of a QMF analysis filter; and an adjusting unit (2602) for adjusting the QMF factor sequence by causing the QMF factor sequence to be dependent on the predetermined adjustment factor.