FIELD: physics.
SUBSTANCE: group of inventions relates to the effective implementation of high-frequency reconstruction (HFR), enhanced cross-pieces. Provided is subband block-based harmonic transposition, where the time block of complex discrete values of subbands is processed by common phase modification. Superposition of multiple modified discrete values yields the resultant effect of limiting undesirable cross products, making it possible to use coarser frequency resolution and/or lesser degree of oversampling.
EFFECT: ability to play a sound signal with high accuracy provided reduced computational costs.
3 cl, 9 dwg
