| Microsoft DirectX 9.0 |
The following tablea describe the media types used for line 21 data.
Major Type
| GUID | Description |
| MEDIATYPE_AUXLine21Data | Line 21 data |
Subtypes
| GUID | Description |
| MEDIASUBTYPE_Line21_BytePair | Line 21 data as byte pairs |
| MEDIASUBTYPE_Line21_GOPPacket | Line 21 data in DVD GOP Packet |
| MEDIASUBTYPE_Line21_VBIRawData | Line 21 data in raw VBI format |