Time-domain time/pitch scaling of speech or audio signals, with transient handling

摘要: Method and apparatus for time-scaling and/or pitch shifting by discarding repeating segments of a signal (302). The (302) is stored as series samples on memory (124) where it readable one or more read pointers (304, 306). Periodicity the determined evaluating normalized cross-correlation over range possible periods. Transients are detected monitoring changes in rms value. To achieve time compression stretching, segment skipped/discarded whenever maximum time-discrepancy between current output an ideal reached high periodicity detected, jump optimal length would not make this discrepancy too high, no transient present to be skipped/discarded.