Patent ID: 9640172
Date: 2017-05-02
CPC Classifications: G10H,G10L

Claim:
1. A sound synthesizing apparatus comprising: a waveform storage configured to store a plurality of unit waveforms extracted from different positions, on a time axis, of a single sound waveform which indicates a voiced sound and is temporally continued, wherein each of the plurality of unit waveforms is shorter in time length than the single sound waveform; and one or more first circuits configured to implement the functionality of: a waveform generator configured to generate, for each of a first processing period and a second processing period, a synthesized waveform by arranging the plurality of unit waveforms on the time axis, wherein the second processing period is an immediately succeeding processing period after the first processing period, wherein, for the first processing period, a first unit waveform for the first processing period and a second unit waveform for the first processing period are selected from among the plurality of unit waveforms extracted from the single sound waveform, the second unit waveform for the first processing period being different from the first unit waveform for the first processing period, a plurality of instances of the first unit waveform for the first processing period is arranged in a first waveform series for the first processing period so that intensities thereof increase with time in the first processing period, a plurality of instances of the second unit waveform for the first processing period is arranged in a second waveform series for the first processing period so that intensities thereof decrease with time in the first processing period, the synthesized waveform for the first processing period is a sum of the first waveform series for the first processing period and the second waveform series for the first processing period, the first waveform series for the first processing period and the second waveform series for the first processing period being cross-faded in the synthesized waveform for the first processing period, and each of the first unit waveform for the first processing period and the second unit waveform for the first processing period is shorter in time length than the single sound waveform, wherein, for the second processing period, a first unit waveform for the second processing period and a second unit waveform for the second processing period are selected from among the plurality of unit waveforms extracted from the single sound waveform, the second unit waveform for the second processing period being different from the first unit waveform for the second processing period, a plurality of instances of the first unit waveform for the second processing period is arranged in a first waveform series for the second processing period so that intensities thereof increase with time in the second processing period, and a plurality of instances of the second unit waveform for the second processing period is arranged in a second waveform series for the second processing period so that intensities thereof decrease with time in the second processing period, the synthesized waveform for the second processing period is a sum of the first waveform series for the second processing period and the second waveform series for the second processing period, the first waveform series for the second processing period and the second waveform series for the second processing period being cross-faded in the synthesized waveform for the second processing period, and each of the first unit waveform for the second processing period and the second unit waveform for the second processing period is shorter in time length than the single sound waveform.