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522 Voice API for Windows Operating Systems Library Reference — November 2003
DX_XPB — input/output transfer parameter block
Table 18. G.721 Voice Coder Support Fields (DM3)
DX_XPB Field DX_XPB Field Value Note
wFileFormat FILE_FORMAT_WAV or
FILE_FORMAT_VOX
wDataFormat DATA_FORMAT_G721
nSamplesPerSec DRT_8KHZ
wBitsPerSample 4 32 kbps
Table 19. Linear PCM Voice Coder Support Fields (DM3)
DX_XPB Field DX_XPB Field Value Note
wFileFormat FILE_FORMAT_WAV or
FILE_FORMAT_VOX
wDataFormat DATA_FORMAT_PCM
nSamplesPerSec DRT_8KHZ
DRT_11KHZ
wBitsPerSample 8 or 16 64, 128, 88 or 176
kbps
Table 20. OKI ADPCM Voice Coder Support Fields (DM3)
DX_XPB Field DX_XPB Field Value Note
wFileFormat FILE_FORMAT_WAV or
FILE_FORMAT_VOX
wDataFormat DATA_FORMAT_DIALOGIC_ADPCM
nSamplesPerSec DRT_6KHZ or
DRT_8KHZ or
wBitsPerSample 4 24 or 32 kbps
Table 21. G.726 Voice Coder Support Fields (DM3)
DX_XPB Field DX_XPB Field Value Note
wFileFormat FILE_FORMAT_WAV or
FILE_FORMAT_VOX
wDataFormat DATA_FORMAT_G726
nSamplesPerSec DRT_8KHZ
wBitsPerSample 2, 3, 4, or 5 16, 24, 32, or 40 kbps