METHOD AND APPARATUS FOR PROCESSING DISCONTINUITIES IN DIGITAL SOUND SIGNALS CAUSED BY PITCH CONTROL

摘要

In pitch conversion, the small discontinuity point process can further improve the degree of discontinuity and simplify the processing. In the large discontinuity point process, the mutual quality at the time of overlapping can be prevented and the sound quality can be improved.;In small discontinuity point processing, the first-order FIR filter is used to smooth the current input data and the data before one sampling cycle, smooth the data before one sampling period, and generate a small discontinuity point within a period when a small discontinuity point occurs. Within a period of time, the degree of discontinuity is decreased by gradually approaching the data after one sampling period (at the time of key up) or the same (at the time of key down), and the change of weighting coefficient at the time of crossfade is changed in the large discontinuity point process. By not forming a straight line and taking the form of iron on two straight lines (cut lines), it is prevented from canceling each other at the time of superposition and the sound quality is improved.