IDvbSatelliteDeliverySystemDescriptor Interface

Microsoft DirectShow 9.0

IDvbSatelliteDeliverySystemDescriptor Interface

This topic applies to Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005 and later.

The IDvbSatelliteDeliverySystemDescriptor interface enables the client to get a satellite delivery system descriptor from a DVB stream. The satellite delivery system descriptor may be present in the network information table (NIT). For more information, refer to ETSI EN 300 468.

In addition to the methods inherited from IUnknown, the IDvbSatelliteDeliverySystemDescriptor interface exposes the following methods.

Method Description
GetFECInner Returns the inner forward error correction (FEC) scheme.
GetFrequency Returns the frequency.
GetLength Returns the length of the descriptor body.
GetModulation Returns the modulation scheme.
GetOrbitalPosition Returns the orbital position.
GetPolarization Returns the polarization of the transmitted signal.
GetSymbolRate Returns the symbol rate.
GetTag Returns the descriptor tag.
GetWestEastFlag Returns a flag that specifies whether the satellite is in the western or eastern part of the orbit.


To obtain a pointer to this interface, do the following:

  1. Call IDvbSiParser::GetNIT to get the IDVB_NIT interface.
  2. Call IDVB_NIT::GetRecordDescriptorByTag and pass in the satellite delivery system descriptor tag (0x43). If the descriptor is present, the method returns an IGenericDescriptor pointer.
  3. Query the returned IGenericDescriptor pointer for the IDvbSatelliteDeliverySystemDescriptor interface.


Header: Include dvbsiparser.h.

See Also