Lesson plan
PSOLA
[[File:Analiza cech suprasegmentalnych języka polskiego Fig.7.1 (p.63).jpg|thumb|300px|Oscillograms, spectrograms and intonograms of Polish expression (a) "jajem" [egg] (b) "ja jem" [I'm eating] (c) "nawóz" [fertiliser] (d) "na wóz" [on a cart] PSOLA (Pitch Synchronous Overlap and Add) is a digital signal processing technique used for speech processing and more specifically speech synthesis. It can be used to modify the pitch and duration of a speech signal. It was invented around 1986. PSOLA works by dividing the speech waveform in small overlapping segments. To change the pitch of the signal, the segments are moved further apart (to decrease the pitch) or closer together (to increase the pitch). To change the duration of the signal, the segments are then repeated multiple times (to increase the duration) or some are eliminated (to decrease the duration). The segments are then combined using the overlap add technique. PSOLA can be used to change the prosody of a speech signal.
Article summary
[[File:Analiza cech suprasegmentalnych języka polskiego Fig.7.1 (p.63).jpg|thumb|300px|Oscillograms, spectrograms and intonograms of Polish expression (a) "jajem" [egg] (b) "ja jem" [I'm eating] (c) "nawóz" [fertiliser] (d) "na wóz" [on a cart] PSOLA (Pitch Synchronous Overlap and Add) is a digital signal processing technique used for speech processing and more specifically speech synthesis. It can be used to modify the pitch and duration of a speech signal. It was invented around 1986. PSOLA works by dividing the speech waveform in small overlapping segments. To change the pitch of the signal, the segments are moved further apart (to decrease the pitch) or closer together (to increase the pitch). To change the duration of the signal, the segments are then repeated multiple times (to increase the duration) or some are eliminated (to decrease the duration). The segments are then combined using the overlap add technique. PSOLA can be used to change the prosody of a speech signal.
Key claims
No claims recorded.
Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
No sources recorded.
Key claims and bibliography are generated from the same tracked claims and sources as the article page.