SpeechSynthesizer.VisemeReached Event

Definition

Namespace:

System.Speech.Synthesis

Assembly:

System.Speech.dll

Package:

System.Speech v9.0.0-rc.2.24473.5

Source:

SpeechSynthesizer.cs

Raised when a viseme is reached.

public:
 event EventHandler<System::Speech::Synthesis::VisemeReachedEventArgs ^> ^ VisemeReached;

public event EventHandler<System.Speech.Synthesis.VisemeReachedEventArgs> VisemeReached;

member this.VisemeReached : EventHandler<System.Speech.Synthesis.VisemeReachedEventArgs> 

Public Custom Event VisemeReached As EventHandler(Of VisemeReachedEventArgs) 

Event Type

EventHandler<VisemeReachedEventArgs>

Remarks

A viseme is the basic position of the mouth and face when pronouncing a phoneme. Visemes are visual representations of phonemes.

System.Speech supports 21 visemes for US English, each of which corresponds to one or more phonemes. VisemeReached events are raised when a new phoneme reached has a different corresponding viseme than the previous phoneme reached. Since some visemes represent more than one phoneme, a VisemeReached event is not generated if the next phoneme reached corresponds to the same viseme as the previous phoneme. For example, for the spoken words "this zone", a PhonemeReached event is raised for the "s" in "this" and the "z" in "zone". However, a VisemeReached event is not raised for the "z" in "zone" because it corresponds to the same viseme as the "s" in "this".

The following is a list of the 21 SAPI phonemes and phoneme groups that correspond to a viseme in US English.

Viseme	Phoneme(s)
0	silence
1	ae, ax, ah
2	aa
3	ao
4	ey, eh, uh
5	er
6	y, iy, ih, ix
7	w, uw
8	ow
9	aw
10	oy
11	ay
12	h
13	r
14	l
15	s, z
16	sh, ch, jh, zh
17	th, dh
18	f, v
19	d, t, n
20	k, g, ng
21	p, b, m

For information about data associated with the VisemeReached event, see VisemeReachedEventArgs.