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DXVA-HD

Microsoft DirectX Video Acceleration High Definition (DXVA-HD) is an API for hardware-accelerated video processing. DXVA-HD uses the GPU to perform functions such as deinterlacing, compositing, and color-space conversion.

DXVA-HD is similar to DXVA Video Processing (DXVA-VP), but offers enhanced features and a simpler processing model. By providing a more flexible composition model, DXVA-HD is designed to support the next generation of HD optical formats and broadcast standards.

The DXVA-HD API requires either a WDDM display driver that supports the DXVA-HD device driver interface (DDI), or a plug-in software processor.

Improvements over DXVA-VP

DXVA-HD expands the set of features provided by DXVA-VP. Enhancements include:

  • RGB and YUV mixing. Any stream can be either RGB or YUV. There is no longer a distinction between the primary stream and the substreams.
  • Deinterlacing of multiple streams. Any stream can be either progressive or interlaced. Moreover, the cadence and frame rate can can vary from one input stream to the next.
  • RGB background colors. Previously, only YUV background colors were supported.
  • Luma keying. When luma keying is enabled, luma values that fall within a designated range become transparent.
  • Dynamic switching between deinterlace modes.

DXVA-HD also defines some advanced features that drivers can support. However, applications should not assume that all drivers will support these features. The advanced features include:

  • Inverse telecine (for example, 60i to 24p).
  • Frame-rate conversion (for example, 24p to 120p).
  • Alpha-fill modes.
  • Noise reduction and edge enhancement filtering.
  • Anamorphic non-linear scaling.
  • Extended YCbCr (xvYCC).

This section contains the following topics.

Related topics

DirectX Video Acceleration 2.0
DXVA-HD Sample

 

 

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