H263_B
The H263_B restricted profile contains the set of features required for support of ITU-T Rec. H.263 and a specific set of enhanced optional capabilities. Support of this profile is currently encouraged, but not required. This set of features is specified by the restrictions listed for the H263_A restricted profile, except for the following additional restrictions.
Restrictions on DXVA_ConnectMode
The following restriction on the DXVA_ConnectMode structure applies when the bDXVA_Func variable defined in the dwFunction member of DXVA_ConfigPictureDecode is equal to 1 (picture decoding).
| Structure Member | Value |
|---|---|
wRestrictedMode |
DXVA_RESTRICTED_MODE_H263_B |
Restrictions on DXVA_PictureParameters
The following restrictions on the DXVA_PictureParameters structure apply when the bDXVA_Func variable defined in the dwFunction member of DXVA_ConfigPictureDecode is equal to 1.
| Structure Member | Value |
|---|---|
bRcontrol |
Equal to zero or 1 |
bPicExtrapolation |
Equal to zero or 1 |
bPic4MVallowed |
Equal to zero or 1 |
bPicScanFixed |
Equal to zero or 1 |
Restrictions on DXVA_MBctrl_I_HostResidDiff_1, DXVA_MBctrl_I_OffHostIDCT_1, DXVA_MBctrl_P_HostResidDiff_1, and DXVA_MBctrl_P_OffHostIDCT_1
| Structure Member | Value |
|---|---|
MBscanMethod |
May be a value of zero (zigzag), a value of 1 (alternate vertical) or a value of 2 (alternate horizontal) if bConfigHostInverseScan is equal to zero. |
wMBtype |
Motion4MV flag contained in this structure member is equal to zero or 1. |
Restrictions on Bitstream Buffers
The contents of any bitstream buffers may also contain data in the H.263 video format with any subset of CPCF, CPFMT and Annexes D, I, N (single forward reference picture per output picture), and T.