IDvbTerrestrialDeliverySystemDescriptor Interface
This topic applies to Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005 and later.
The IDvbTerrestrialDeliverySystemDescriptor interface enables the client to get a terrestrial delivery system descriptor from a DVB stream. The terrestrial delivery system descriptor may be present in the network information table (NIT). For more information, refer to ETSI EN 300 468.
Methods
The IDvbTerrestrialDeliverySystemDescriptor interface inherits the methods of the IUnknown interface.
In addition, IDvbTerrestrialDeliverySystemDescriptor defines the following methods.
| Method | Description |
|---|---|
Returns the bandwidth in use. |
|
Returns the center frequency. |
|
Returns the code rate for the high-priority (HP) stream. |
|
Returns the code rate for the low-priority (LP) stream. |
|
Returns the constellation pattern. |
|
Returns the guard interval. |
|
Returns the hierarchy alpha information. |
|
Returns the length of the descriptor body. |
|
Returns a flag that specifies whether other frequencies are in use. |
|
Returns the descriptor tag. |
|
Returns the transmission mode. |
Remarks
To obtain a pointer to this interface, do the following:
- Call IDvbSiParser::GetNIT to get the IDVB_NIT interface.
- Call IDVB_NIT::GetRecordDescriptorByTag and pass in the terrestrial delivery system descriptor tag (0x5A). If the descriptor is present, the method returns an IGenericDescriptor pointer.
- Query the returned IGenericDescriptor pointer for the IDvbTerrestrialDeliverySystemDescriptor interface.
Requirements
| Header | Declared in Dvbsiparser.h. |
See Also
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Build date: 12/4/2008