C Specification
// Provided by XR_META_face_tracking_visemes
typedef enum XrFaceTrackingVisemeMETA {
XR_FACE_TRACKING_VISEME_SIL_META = 0,
XR_FACE_TRACKING_VISEME_PP_META = 1,
XR_FACE_TRACKING_VISEME_FF_META = 2,
XR_FACE_TRACKING_VISEME_TH_META = 3,
XR_FACE_TRACKING_VISEME_DD_META = 4,
XR_FACE_TRACKING_VISEME_KK_META = 5,
XR_FACE_TRACKING_VISEME_CH_META = 6,
XR_FACE_TRACKING_VISEME_SS_META = 7,
XR_FACE_TRACKING_VISEME_NN_META = 8,
XR_FACE_TRACKING_VISEME_RR_META = 9,
XR_FACE_TRACKING_VISEME_AA_META = 10,
XR_FACE_TRACKING_VISEME_E_META = 11,
XR_FACE_TRACKING_VISEME_IH_META = 12,
XR_FACE_TRACKING_VISEME_OH_META = 13,
XR_FACE_TRACKING_VISEME_OU_META = 14,
XR_FACE_TRACKING_VISEME_MAX_ENUM_META = 0x7FFFFFFF
} XrFaceTrackingVisemeMETA;Description
| Viseme | Phonemes | Examples | Mild Production | Emphasized Production | Rotated Image |
|---|---|---|---|---|---|
SIL ( |
neutral |
|
None |
|
|
PP ( |
p, b, m |
put, bat, mat |
|
|
|
FF ( |
f, v |
fat, vat |
|
|
|
TH ( |
th |
think, that |
|
|
|
DD ( |
t, d |
tip, doll |
|
|
|
KK ( |
k, g |
call, gas |
|
|
|
CH ( |
tS, dZ, S |
chair, join, she |
|
|
|
SS ( |
s, z |
sir, zeal |
|
|
|
NN ( |
n, l |
lot, not |
|
|
|
RR ( |
r |
red |
|
|
|
AA ( |
A: |
car |
|
|
|
E ( |
e |
bed |
|
|
|
IH ( |
ih |
tip |
|
|
|
OH ( |
oh |
toe |
|
|
|
OU ( |
ou |
book |
|
|
|
Document Notes
For more information, see the OpenXR Specification
This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright 2014-2026 The Khronos Group Inc.
This work is licensed under a Creative Commons Attribution 4.0 International License.