العربية
中国
Français
Deutsch
Ελληνική
हिन्दी
Italiano
日本語
Português
Русский
EspañolPITCH CONTOUR
In linguistics, speech synthesis, and music, the 'pitch contour' of a sound is a function or curve that tracks the perceived pitch of the sound over time. Because it deals with complex sounds involving many pitches, it is necessarily a relative measure that relates the frequency function at one point in time to the frequency function at a later point.
It is fundamental to the linguistic concept of tone, where the pitch or change in pitch of a speech unit over time affects the semantic meaning of a sound. It also indicates intonation in pitch accent languages.
One of the primary challenges in speech synthesis technology, particularly for Western languages, is to create a natural-sounding pitch contour for the utterance as a whole. Unnatural pitch contours result in synthesis that sounds "lifeless" or "emotionless" to human listeners, a feature that has become a stereotype of speech synthesis in popular culture.
In music, the pitch contour focuses on the relative change in pitch over time of a primary sequence of played notes. The same contour can be transposed without losing its essential relative qualities, such as sudden changes in pitch or a pitch that rises or falls over time.
Pure tones have a clear pitch, but complex sounds such as speech and music typically have intense peaks at many different frequencies. Nevertheless, by establishing a fixed reference point in the frequency function of a complex sound, and then observing the movement of this reference point as the function translates, one can generate a meaningful pitch contour consistent with human experience.
For example, the vowel ''e'' has two primary formants, one peaking between 400 and 600 Hz and one between 2200 and 2600 Hz. When a person speaks a sentence involving multiple ''e'' sounds, the peaks will shift within these ranges, and the movement of the peaks between two instances establishes the difference in their values on the pitch contour.
★ Reuven Tsur. Phonetic Cues and Dramatic Function Artistic Recitation of Metered Speech. Tel Aviv University. A research article containing images illustrating many specific examples of pitch contours for recited poetry.
It is fundamental to the linguistic concept of tone, where the pitch or change in pitch of a speech unit over time affects the semantic meaning of a sound. It also indicates intonation in pitch accent languages.
One of the primary challenges in speech synthesis technology, particularly for Western languages, is to create a natural-sounding pitch contour for the utterance as a whole. Unnatural pitch contours result in synthesis that sounds "lifeless" or "emotionless" to human listeners, a feature that has become a stereotype of speech synthesis in popular culture.
In music, the pitch contour focuses on the relative change in pitch over time of a primary sequence of played notes. The same contour can be transposed without losing its essential relative qualities, such as sudden changes in pitch or a pitch that rises or falls over time.
Pure tones have a clear pitch, but complex sounds such as speech and music typically have intense peaks at many different frequencies. Nevertheless, by establishing a fixed reference point in the frequency function of a complex sound, and then observing the movement of this reference point as the function translates, one can generate a meaningful pitch contour consistent with human experience.
For example, the vowel ''e'' has two primary formants, one peaking between 400 and 600 Hz and one between 2200 and 2600 Hz. When a person speaks a sentence involving multiple ''e'' sounds, the peaks will shift within these ranges, and the movement of the peaks between two instances establishes the difference in their values on the pitch contour.
| Contents |
| External links |
External links
★ Reuven Tsur. Phonetic Cues and Dramatic Function Artistic Recitation of Metered Speech. Tel Aviv University. A research article containing images illustrating many specific examples of pitch contours for recited poetry.
This article provided by Wikipedia. To edit the contents of this article, click here for original source.
psst.. try this: add to faves
